TECHNICAL & SERVICE MANUAL R410A

Transcription

1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS TECHNICAL & SERVICE MANUAL R40A Outdoor unit [Model Name] SUZ-KA25VA SUZ-KA35VA SUZ-KA25VAH SUZ-KA35VAH SUZ-KA50VA SUZ-KA60VA SUZ-KA7VA SUZ-KA25VA(H).TH SUZ-KA35VA(H).TH [Service Ref.] SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAH.TH SUZ-KA35VAH.TH SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA50VAR2.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH Indication of model name SUZ-KA25VA(H)R.TH SUZ-KA35VA(H)R.TH SUZ-KA25VAR.TH SUZ-KA35VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VAHR.TH CONTENTS March 5. OC3 REVISED EDITION-J HFC utilized R40A Revision: Corrected the diagram for SUZ-KA25VAR.TH and SUZ-KA25VAHR.TH in "8. REFRIERANT SYSTEM DIARAM" in REVISED EDITION-J. Some descriptions have been modified. Please void OC3 REVISED EDITION-H. tes: This manual describes service data of the indoor units only. RoHS compliant products have <> mark on the spec name plate.. COMBINATION OF INDOOR AND OUTDOOR UNITS TECHNICAL CHANES PARTS NAMES AND FUNCTIONS SPECIFICATION NOISE CRITERIA CURVES OUTLINES AND DIMENSIONS WIRIN DIARAM REFRIERANT SYSTEM DIARAM PERFORMANCE CURVES ACTUATOR CONTROL SERVICE FUNCTIONS TROUBLESHOOTIN DISASSEMBLY PROCEDURE PARTS LIST RoHS PARTS LIST... 9

2 COMBINATION OF INDOOR AND OUTDOOR UNITS -. INDOOR UNIT SERVICE MANUAL Heat pump without electric heater Service Ref. SLZ-KA25VA(L).TH SLZ-KA35VA(L).TH SLZ-KA50VA(L).TH SEZ-KC25VA.W SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA7VA.TH SEZ-KD25VA(L).TH SEZ-KD35VA(L).TH SEZ-KD50VA(L).TH SEZ-KD60VA(L).TH SEZ-KD7VA(L).TH MFZ-KA25VA-E MFZ-KA35VA-E MFZ-KA50VA-E Indoor unit Service Manual. OC3 OC HWE07 OB409 Outdoor unit Heat pump type SUZ- KA25VA(H).TH KA35VA(H).TH KA50VA().TH KA60VA().TH KA25VA(H)R.TH KA60VAR2.TH KA7VA ().TH KA35VA(H)R.TH KA50VAR2.TH NOTES: Please refer to the service manual of indoor unit or the technical data book for the combination data. Only MFZ-KA VA series can be connected to SUZ-KA VAH series. -2. TECHNICAL DATA BOOK OCS03 OC3J 2

3 2 TECHNICAL CHANES SUZ-KA25VA.TH SUZ-KA25VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH SUZ-KA25VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VAR.TH SUZ-KA35VAHR.TH. Inverter P.C. board and Power P.C. board have been changed. 2. Refrigerant circuit has been changed. Compressor has been changed. (KNB073FDVH(C) KNB073FFDHC : SUZ-KA25VA(H)R.TH) (KNB092FCAH KNB092FFAHC : SUZ-KA35VA(H)R.TH) Muffler of liquid pipe side has been deleted. Muffler of gas pipe side has been changed. Capillary tube of liquid pipe side has been added. (SUZ-KA35VA(H)R.TH) 4-way valve and R.V. coil have been changed. Specification of LEV body has been changed. Stop valve has been changed. 3. Precharged refrigerant amount has been changed. (900 g 800 g : SUZ-KA25VA(H)R.TH) 4. Fan motor has been changed. (RC0J50-AL RC0J50-DB) 5. Outdoor heat exchanger temperature thermistor (RT68) has been added. SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA50VAR2.TH SUZ-KA60VAR2.TH. OUTDOOR ELECTRONIC CONTROL P.C. BOARD has been changed. 2. Compressor has been changed. (SNBFLDH() SNBFBH) 3. High pressure switch has been added. (SUZ-KA60VAR2.TH) 4. Thermistors (RT6, 62, 64, 65, 68) have been changed. (SUZ-KA50VAR2.TH) SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH. OUTDOOR ELECTRONIC CONTROL P.C. BOARD has been changed. 2. Max. height difference 5 m m (Except when combined with MFZ). 3. uaranteed operating range Lower limit (Cooling/Outdoor) 0:DB 5:DB (Except when combined with MFZ) SUZ-KA25VA.TH SUZ-KA35VA.TH Lower limit (Heating/Outdoor) 0:DB 5:DB. SUZ-KA35VAH.TH Defrost finish temperature has been changed (Refer to. SERVICE FUNCTIONS). SUZ-A09VR.TH SUZ-A2VR.TH SUZ-KA25VA.TH SUZ-KA35VA.TH. Indication of capacity has been changed.(btu base kw base) 2. Control method between indoor and outdoor unit has been changed. 3. Power supply method has been changed (change to supply from outdoor unit). 4. Terminal block for power supply has been added. 5. Power P.C. board has been changed. 6. Inverter P.C. board has been changed. 7. Refrigerant circuit has been changed. Compressor has been changed. (KNB073FBVH KNB073FDVH:SUZ-KA25VA) (KNB092FAAH KNB092FCAH:SUZ-KA35VA) Specification and position of muffler have been changed. Path of outdoor heat exchanger has been changed. 4-way valve and R.V. coil have been changed. Stop valve has been changed. 8. Fan motor has been changed. (AC DC) 9. Shape of grille has been changed. 0. Shape of service panel has been changed.. Shape of propeller has been changed. 2. Symbol on terminal block has been changed (to S/S2/S3). OC3J 3

4 SUZ-A8VR SUZ-AVR SUZ-KA50VA.TH SUZ-KA60VA.TH. Indication of capacity has been changed.(btu base kw base) 2. Power supply method has been changed (change to supply from outdoor unit). 3. Outdoor electronic control P.C. board has been changed. 4. ise filter P.C. board has been changed. 5. Length of fan motor lead wire has been changed. 6. Shape of relay panel has been changed. 7. Symbol on terminal block has been changed (to S/S2/S3). 8. Control method between indoor and outdoor unit has been changed. INFORMATION FOR THE AIR CONDITIONER WITH R40A REFRIERANT This room air conditioner adopts an HFC refrigerant (R40A) which never destroys the ozone layer. Pay particular attention to the following points, though the basic installation procedure is same as that for R conditioners. As R40A has working pressure approximate.6 times as high as that of R, some special tools and piping parts/ materials are required. Refer to the table below. 2 Take sufficient care not to allow water and other contaminations to enter the R40A refrigerant during storage and installation, since it is more susceptible to contaminations than R. 3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R40A. (Refer to 2. Refrigerant piping.) 4 Composition change may occur in R40A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent composition change. Refrigerant Refrigerant oil Refrigerant Composition (Ratio) Refrigerant handling Chlorine Safety group (ASHRAE) Molecular weight Boiling point (:) Steam pressure [25:](Mpa) Saturated steam density [25:](Kg/K) Combustibility ODP * WP *2 Refrigerant charge method Additional charge on leakage Kind Color Smell *. Ozone Depletion Potential : based on CFC- *2. lobal Warming Potential : based on CO 2 New refrigerant R40A HFC-: HFC-25 (50%:50%) Pseudo-azeotropic refrigerant t included A/A n combustible 0 7 From liquid phase in cylinder Possible Incompatible oil ne ne Previous refrigerant R R (00%) Single refrigerant Included A n combustible as phase Possible Compatible oil Light yellow ne OC3J 4

5 Compressor New Specification Current Specification The incompatible refrigerant oil easily separates from refrigerant and is in the upper layer inside the suction muffler. Raising position of the oil back hole enables to back the Since refrigerant and refrigerant oil are compatible with each other, refrigerant oil backs to the compressor through the lower position oil back hole. refrigerant oil of the upper layer to flow back to the compressor. Suction muffler Suction muffler Compressor Oil back hole Refrigerant oil Compressor Oil back hole Refrigerant Refrigerant oil /Refrigerant NOTE : The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversion factor is: (MPa [auge]) =0.2 (kgf/cm 2 [auge]) Conversion chart of refrigerant temperature and pressure (MPa [auge]) R40A Saturated liquid pressure R NOTE: The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversion factor is: (MPa [auge]) =0.2 (kgf/cm 2 [auge]) (:). Tools dedicated for the air conditioner with R40A refrigerant The following tools are required for R40A refrigerant. Some R tools can be substituted for R40A tools. The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit. Cap size has been changed from 7/6 UNF with threads to /2 UNF with threads. R40A tools auge manifold Charge hose as leak detector Torque wrench Flare tool Flare gauge Vacuum pump adapter Electronic scale for refrigerant charging : t substitutable for R40A Can R tools be used? New New New Description R40A has high pressures beyond the measurement range of existing gauges. Port diameters have been changed to prevent any other refrigerant from being charged into the unit. Hose material and cap size have been changed to improve the pressure resistance. Dedicated for HFC refrigerant mm and 9.52 mm 2.7 mm and 5.88 mm Clamp bar hole has been enlarged to reinforce the spring strength in the tool. Provided for flaring work (to be used with R flare tool). Provided to prevent the back flow of oil. This adapter enables you to use vacuum pumps. It is difficult to measure R40A with a charging cylinder because the refrigerant bubbles due to high pressure and high-speed vaporization : Substitutable for R40A OC3J 5

6 2. Refrigerant piping Specifications Use the refrigerant pipes that meet the following specifications. Pipe For liquid For gas Outside diameter mm Wall thickness mm Insulation material Heat resisting foam plastic Specific gravity Thickness 8 mm Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less than 0.8mm, as the pressure resistance is insufficient. 2 Flaring work and flare nut Flaring work for R40A pipe differs from that for R pipe. For details of flaring work, refer to Installation manual FLARIN WORK. Pipe diameter (mm) R40A 7 Dimension of flare nut (mm) 3. Refrigerant oil Apply the special refrigerant oil (accessories: packed with indoor unit) to the flare and the union seat surfaces. 4. Air purge Do not discharge the refrigerant into the atmosphere. Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant circuit. Use the vacuum pump for air purging for the purpose of environmental protection. 5. Additional charge For additional charging, charge the refrigerant from liquid phase of the gas cylinder. If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the outdoor unit. In this case, ability of the refrigerating cycle decreases or normal operation can be impossible. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly. R 7 Union Stop valve Indoor unit Liquid pipe as pipe Outdoor unit Refrigerant gas cylinder operating valve Service port auge manifold valve (for R40A) Charge hose (for R40A) Refrigerant gas cylinder for R40A with siphon Refrigerant (liquid) Electronic scale for refrigerant charging OC3J 6

7 3 PARTS NAMES AND FUNCTIONS SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAH.TH SUZ-KA35VAH.TH SUZ-KA25VAR.TH SUZ-KA35VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VAHR.TH OUTDOOR UNIT ACCESSORIES Air inlet (back and side) Piping Drain hose Air outlet SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAR.TH SUZ-KA35VAR.TH Drain socket Drain outlet SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA50VAR2.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH OUTDOOR UNIT Air inlet (back and side) Piping ACCESSORIES Drain hose Air outlet Drain outlet 2 Drain socket Drain cap [33 SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH SUZ-KA50VAR2.TH SUZ-KA60VAR2.TH 2 OC3J 7

8 4 SPECIFICATION Outdoor Service Ref. SUZ-KA25VA(H).TH SUZ-KA25VA(H)R.TH SUZ-KA35VA(H).TH SUZ-KA35VA(H)R.TH SUZ-KA50VA.TH SUZ-KA50VA.TH Electrical data Compressor Fan motor Special remarks Function Power supply Starting current ** Compressor motor current ** Fan motor current ** Model Output Winding resistance (at :) Model Winding resistance(at :) Air flow(high/low*) Dimensions WOHOD Weight Sound level ** Fan speed (High*/Low*, High*/Med*/Low*) Fan speed regulator Refrigerant filling capacity(r40a) Refrigerating oil (Model) A A A W " " K/h mm kg db rpm kg cc Cooling Heating Single phase 2 V, 50 Hz KNB073FFDH(C) 550 U-V.53 U-W.53 V-W.53 RC0J50-AL WHT-BLK 37.5 BLK-RED 37.5 RED-WHT , o550o * /650* , */80* /650* 3 3 (NEO) te : Test conditions are based on ISO 55 Cooling : Indoor D.B. : W.B. 9: Outdoor D.B. 35: W.B. : Heating : Indoor D.B. : W.B. 5: Outdoor D.B. 7: W.B. 6: Refrigerant piping length (one way): 5 m * Reference value ** Measured under rated operating frequency. Cooling Heating Single phase 2V, 50Hz KNB073FFDH(C) 550 U-V.70 U-W.70 V-W.70 RC0J50-DB WHT-BLK 37.0 BLK-RED 37.0 RED-WHT , o550o * /760* 880*/80* /650* ,938 3 (NEO) Cooling Heating Single phase 2V, 50Hz KNB092FCAH 650 U-V 0.49 U-W 0.49 V-W 0.49 RC0J50-AL WHT-BLK 37.5 BLK-RED 37.5 RED-WHT , o550o * /480* */800* /6 3 (NEO) Cooling Heating Single phase 2V, 50Hz KNB092FFAH(C) 650 U-V.9 U-W.9 V-W.9 RC0J50-DB WHT-BLK 37.0 BLK-RED 37.0 RED-WHT * /760* 2, o550o */800* /6* (NEO) Cooling Heating Single phase 2V, 50Hz SNBFLDH or SNBFLDH 850 U-V 0.45 U-W 0.45 V-W 0.45 RC0J60-AA WHT-BLK 5.2 BLK-RED 5.2 RED-WHT 5.2 2,940 /,650* 2,940 /,650* 840o850o /5* 55/53* 800/480* 800/6* 2.60 FLDH: 450 /FLDH: 600(NEO) OC3J 8

9 Outdoor Service Ref. SUZ-KA50VAR2.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH Electrical data Compressor Fan motor Function Power supply Starting current ** Compressor motor current ** Fan motor current ** Model Output Winding resistance (at :) Model Winding resistance(at :) A A A W " " Cooling Heating Single phase 2V, 50Hz SNBFBH(T) 900 U-V 0.98 U-W 0.98 V-W 0.98 RC0J60-AA WHT-BLK 5.2 BLK-RED 5.2 RED-WHT 5.2 Cooling Heating Single phase 2V, 50Hz SNBFLDH or SNBFLDH 850 U-V 0.45 U-W 0.45 V-W 0.45 RC0J60-AA WHT-BLK 5.2 BLK-RED 5.2 RED-WHT 5.2 Cooling Heating Single phase 2V, 50Hz SNBFBH(T) 900 U-V 0.98 U-W 0.98 V-W 0.98 RC0J60-AA WHT-BLK 5.2 BLK-RED 5.2 RED-WHT 5.2 Cooling Heating Single phase 2V, 50Hz TNB0FMCH(T) 0 U-V.4 U-W.4 V-W.4 RC0J60-AA WHT-BLK 5.2 BLK-RED 5.2 RED-WHT 5.2 Capacity Air flow(high/low*) K /h 2,940/,650* 2,940/2,* 2,940/650* 2,940/2,* 2,940/650* 2,940/2,* 2,940/650* 2,940/2,* Special remarks Dimensions WOHOD Weight Sound level * Fan speed(high*/low*, High*/Med*/Low*) Fan speed regulator Refrigerant filling capacity(r40a) Refrigerating oil (Model) mm kg db rpm kg cc 840o850o /5* 800/480* /53* 800/6* 450 (NEO) 840o850o o850o /5* 55/53* 53/5* 55/53* 800/480* 800/6* 800/480* 800/6* FLDH: 450 /FLDH: 600 (NEO) 450 (NEO) 840o850o /5* 800/480* /53* 800/6* 870 (NEO) te : Test conditions are based on ISO 55 Cooling : Indoor D.B. : W.B. 9: Outdoor D.B. 35: W.B. : Heating : Indoor D.B. : W.B. 5: Outdoor D.B. 7: W.B. 6: Refrigerant piping length (one way): 5 m * Reference value ** Measured under rated operating frequency. OC3J 9

10 Specifications and rating conditions of main electric parts SUZ-KA25VA.TH SUZ-KA25VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH Item Model Current transformer (CT) Current transformer (CT76, CT78) Smoothing capacitor (C63A, C63B, C63C) Diode module (DB6, DB65) Fuse (F6) Fuse (F7, F80, F90) Defrost heater (H) Intelligent power module (IPM) Expansion valve coil (LEV) Reactor (L6) Current-detecting resistor (R6) Current-detecting resistor (R83) Current-limiting resistor (R64A, R64B) Terminal block (TB,TB2) Relay (X63) Relay (X64) Relay (X66) R.V. coil (2S4) Heater protector (H) Item Smoothing capacitor Current transformer Current transformer Fuse Fuse Fuse Intelligent power module High pressure switch Intelligent power module Reactor Expansion valve coil Power factor controller Resistor Resistor Resistor Solenoid coil relay Terminal block Terminal block Relay R.V. coil Model (CB,2,3) (CT,2) (CT6) (F64) (F80) (F9) (HC9) (HPS) (IPM) (L) (LEV) (PFC) (R64A,B) (R937A,B) (RS~4) (SSR6) (TB) (TB2) (X64) (2S4) SUZ-KA25VA.TH SUZ-KA25VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH ETA9Z59BZ ETQ9Z7AY 6+ 4V D25 B60 250V A 250V 3.5A 2V W 2V W PS44-A-3 CAD-MD2ME 2VDC 0A 23.0mH 45m" 5W ( element) 50m" 5W (2 elements) 25m" 5W 5." 5W 3P 5NB-a 4A-A-PS 5NB-a 5NB-a STF-0AJ503 Open 45: SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH Open 45: SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA50VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH V ETQ9Z68AY ETQ9Z53AY 250V 2A 250V 3.5A 250V A PS6-RZ ACB-DB56 (for R2) ACB-DB56 PS44-A 340μH A 2 V DC PS5259-A 0" 0W." 2W 2% 0.04" 7W TLP3506 3P 3P 4A 0 0 V AC OC3J 0

11 SUZ-KA25VAR.TH SUZ-KA35VAR.TH SUZ-KA50VAR2.TH SUZ-KA25VAHR.TH SUZ-KA35VAHR.TH Item Current transformer Smoothing capacitor Diode module Fuse Defrost heater Intelligent power module Expansion valve coil Reactor Currentdetecting resistor Current-limiting PTC thermistor Terminal block Relay R.V. coil Heater protector IBT Model (CT) (CT76, CT78) (C6) (C62, C63) (DB6) (DB65) (F6) (F70, F80, F90) (H) (IPM) (LEV) (L6) (R6) (R6,R62) (R825) (R937, R938, R939) (R937A, R937B) (PTC64, PTC65) (TB, TB2) (X63) (X64) (X66) (2S4) (H) (TR82) SUZ-KA25VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VAR.TH SUZ-KA35VAHR.TH SUZ-KA50VAR2.TH A 5 A 6 μf 4 V 6 μf 4 V 5 A 600 V 25 A 600 V 25 A 600 V TAL250V T3.5AL250V 2 V 2 V W W 5 A 600 V A 600 V 2 V DC 23 mh 45 mω 5 W ( element) 00 mω 5 W (2 elements) 80 mω 5 W (2 elements) 25 mω 5 W 4 mω 2 W. Ω 2 W 33 Ω 3 P 3 A 250 V A 250 V 3 A 250 V 3 A 250 V 0 0 V AC Open 45 C Open 45 C A 600 V OC3J

12 5 NOISE CRITERIA CURVES SUZ-KA25VA.TH SUZ-KA25VAH.TH SUZ-KA25VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH SUZ-KA35VAR.TH SUZ-KA35VAHR.TH FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE High Med. COOLIN HEATIN High Med. COOLIN HEATIN Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (:) Heating : Dry-bulb temperature 7: Wet-bulb temperature 6: 90 OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE THRESHOLD OF HEARIN FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES, Hz NC-70 NC-60 NC-50 NC-40 NC- NC- Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (:) Heating : Dry-bulb temperature 7: Wet-bulb temperature 6: 90 OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE THRESHOLD OF HEARIN FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES, Hz NC-70 NC-60 NC-50 NC-40 NC- NC- SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA50VAR2.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR FAN SPEED High FUNCTION SPL(dB(A)) LINE COOLIN HEATIN Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (:) Heating : Dry-bulb temperature 7: Wet-bulb temperature 6: 90 APPROXIMATE THRESHOLD OF HEARIN FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES, Hz NC-70 NC-60 NC-50 NC-40 NC- NC- OUTDOORUNIT m MICROPHONE OC3J 2

13 6 OUTLINES AND DIMENSIONS SUZ-KA25VA.TH SUZ-KA25VAH.TH SUZ-KA25VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH SUZ-KA35VAR.TH SUZ-KA35VAHR.TH 400 Air in Drain hole [42 (SUZ-KA25/KA35VA) Drain hole [33 (SUZ-KA25/KA35VAH) REQUIRED SPACE 00mm or more Basically, leave this space open. Only if front and both sides are open, leave 00 mm at minimum. 00mm or more Unit: mm Air in.3 23 Service panel Handle 550 Bolt pitch for installation 4~5 0mm or more 350mm or more 2 holes 0 2 Air out Leave any two sides among right, left or rear open. Liquid refrigerant pipe joint Refrigerant pipe (flared) [ Service port as refrigerant pipe joint Refrigerant pipe (flared) [ Bolt pitch for installation 800 OC3J 3

14 SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA50VAR2.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH Unit: mm REQUIRED SPACE Drain holes [33 Basically, leave this space open. Only if front and both sides are open, leave 500 mm at minimum mm or more 00 mm or more mm or more. Leave any two sides among right, left or rear open. 350 mm or more Service panel 850 Liquid refrigerant pipe joint Refrigerant pipe(flared) [6.35 (SUZ-KA50/KA60VA) [9.52 (SUZ-KA7VA) as refrigerant pipe joint Refrigerant pipe(flared) [2.7 (SUZ-KA50VA) [5.88 (SUZ-KA60/KA7VA) OC3J 4

15 7 WIRIN DIARAM SUZ-KA25VA.TH SUZ-KA35VA.TH L6 BLK BLK BLK F6 TB2 WHT 2V~ MODELS WIRIN DIARAM U S BLK WHT LD-U LD-V U DB BLU S2 C63B TAB63 R64A X64 L63 L62 TAB6 WHT CT76 P R64B wc W RED RED CN6 V F80 LD-W N C63C C63A LD70 TAB62 RED S3 2-V 3 NR63 TO INDDOR UNIT CONNECTIN 2 3 W V CT78 WHT IPM R6 BLK T80 BLU 4 CT NR64 CN7 LD69 6 TB CIRCUIT BREAKER TB800 X63 F7 LEV L IC80 F90 2S4 2 CN72 DSA6 TR82 RN N LDE ~/N 2V 50Hz CN7 RN/YLW 6 IC9 R83 DB65 PE POWER SUPPLY INVERTER P.C. BOARD LDY CN725 CN7 4 CN CN9 CN64 CN CN643 2 CN POWER P.C. BOARD RN MF RT6 RT62 RT64 RT65 WHITE BLU RED NOTES:. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only. (For field wiring) 3. Symbols below indicate. /: Terminal block, : Connector NAME CURRENT-DETECTIN RESISTOR CURRENT-LIMITIN RESISTOR TERMINAL BLOCK SWITCHIN POWER TRANSISTOR TRANSFORMER RELAY REVERSIN VALVE COIL EXPANSION VALVE COIL SYMBOL R6,R83 R64A,R64B TB,TB2 TR82 T80 X63,X64 2S4 LEV NAME REACTOR CMC COIL COMPRESSOR OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR DISCHARE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR AMBIENT TEMPERATURE THERMISTOR SYMBOL L6 L62,L63 MC MF NR63,NR64 RT6 RT62 RT64 RT65 NAME CURRENT TRANSFORMER SMOOTHIN CAPACITOR DIODE MODULE SURE ABSORBER FUSE (TAL250V) FUSE (T3.5AL250V) FUSE (T3.5AL250V) INTELLIENT POWER DEVICE INTELLIENT POWER MODULE SYMBOL CT,CT76,CT78 C63A,C63B,C63C DB6,DB65 DSA6 F6 F7 F80,F90 IC80 IPM,IC9 OC3J 5

16 SUZ-KA25VAR.TH SUZ-KA35VAR.TH NOTES:. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only. (For field wiring) 3. Symbols below indicate. : Terminal block OC3J 6

17 SUZ-KA25VAH.TH SUZ-KA35VAH.TH MODELS WIRIN DIARAM L6 BLK BLK BLK U W BLK WHT LD-U LD-V U DB6 CT76 P SYMBOL CT,CT76,CT78 C63A,C63B,C63C DB6,DB65 DSA6 F6 F7 F80,F90 IC80 IPM,IC9 LEV TAB63 R64A SYMBOL L6 L62,L63 MC MF NR63,NR64 RT6 RT62 RT64 RT65 R6,R83 MC SYMBOL R64A,R64B TB,TB2 TR82 T80 X63,X64,X66 2S4 H H NAME CURRENT TRANSFORMER SMOOTHIN CAPACITOR DIODE MODULE SURE ABSORBER FUSE (TAL250V) FUSE (T3.5AL250V) FUSE (T3.5AL250V) INTELLIENT POWER DEVICE INTELLIENT POWER MODULE EXPANSION VALVE COIL RED RED CN6 V F80 + CT 4 3 F90 IC9 NOTES:. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only. (For field wiring) 3. Symbols below indicate. /: Terminal block, : Connector NAME CURRENT-LIMITIN RESISTOR TERMINAL BLOCK SWITCHIN POWER TRANSISTOR TRANSFORMER RELAY REVERSIN VALVE COIL DEFROST HEATER HEATER PROTECTOR NAME REACTOR CMC COIL COMPRESSOR OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR DISCHARE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR AMBIENT TEMPERATURE THERMISTOR CURRENT-DETECTIN RESISTOR RN NR64 NR63 LDE DSA6 R83 LDY CN9 CN643 CN64 CN642 CN CN RN F6 TAB6 WHT MF RT65 RT6 RT62 RT64 BLK BLK BLK BLK BLK BLK 2 RED YLW + + BLK TAB62 2 X66 CN7 3 R64B CN7 6 CN725 CN7 4 L62 POWER P.C. BOARD C63C 2 3 LD-W N C63B C63A LD70 X64 V WHT W IPM CT78 R6 L63 CN7 2 BLU T80 LD69 TB S4 IC80 CN72 TR82 BLK 2-V X63 LEV 6 F7 DB65 INVERTER P.C. BOARD TO INDDOR UNIT CONNECTIN CIRCUIT BREAKER ~/N 2V 50Hz POWER SUPPLY 2V~ S S2 S3 L N TB2 TB PE RN/YLW H H BLU WHITE WHT BLU RED RED OC3J 7

18 SUZ-KA25VAHR.TH SUZ-KA35VAHR.TH NOTES:. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only. (For field wiring) 3. Symbols below indicate. : Terminal block OC3J 8

19 SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH R64B WHT BLU LDE2 CN92 YLW BRN RN/YLW NOISE FILTER P.C.BOARD TO INDOOR UNIT CONNECTIN 2V~ 2-V S3 3 CN6 RED CN CN3 2 PFC POWER SUPPLY ~/N 2V 50Hz CIRCUIT BREAKER RT65 R64A NR64 CN RS RS2 RS3 RS4 LD9 POWER BOARD RN RT64 F80 RED WHT CB CB2 CB3 BLU WHT BLU NF ELECTRONIC CONTROL P.C.BOARD L BLK BLK BLK IPM CT2 CT U RY PNK ORN BLU YLW RED WHT BLK RED BLK HC9 BLK BLK BLK BLK BLK BLK BLK BLK BLK BLK RN RN BLU BLU SSR6 S TB2 CN CN795 6 CN4 2 W 3 CN60 S2 TAB CT6 2 X CN CN702 2 CN70 LD2 3 LD CN80 CN LDE F9 F64 TB L N PE TAB2 2S4 TAB4 2 RED RED S 3 4 YLW R 7 2 CN CN2 2 CN903 2 CN5 RT6 RT62 RT68 LEV T80 R937A R937B CN9 V V WHT W MC U MF SYMBOL NAME CB~3 SMOOTHIN CAPACITOR CT, 2 CURRENT TRANSFORMER CT6 CURRENT TRANSFORMER F64 FUSE (T2AL 250V) F80 FUSE (T3.5AL 250V) FUSE (TAL 250V) F9 HC9 INTELLIENT POWER MODULE IPM INTELLIENT POWER MODULE L REACTOR LEV EXPANSION VALVE COIL SYMBOL NAME MC COMPRESSOR MF RT6 RT62 OUTDOOR FAN MOTOR NOISE FILTER NF NR64 VARISTOR PFC R64A,B RESISTOR POWER FACTOR CONTROLLER R937A, B RESISTOR RS~4 RESISTOR DEFROST THERMISTOR DISCHARE TEMPERATURE THERMISTOR SYMBOL NAME RT64 FIN TEMPERATURE THERMISTOR RT65 AMBIENT TEMPERATURE THERMISTOR RT68 OUTDOOR HEAT EXCHANER TEMPERATURE THERMISTOR T80 TRANSFORMER SSR6 SOLENOID COIL RELAY TB TERMINAL BLOCK TB2 TERMINAL BLOCK X64 RELAY 2S4 REVERSIN VALVE COIL NOTES:. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only (for field wiring). 3. Symbols below indicate. :Terminal block :Connector OC3J 9

20 SUZ-KA50VAR2.TH L6 ORN YLW X64 PTC64 F70 LD63 BLK LD-E PTC65 CT POWER SUPPLY ~/N 2V 50Hz TB RN/YLW U N L L62 DSA CIRCUIT BREAKER U U BRN BLU LD-S 3 LD62 LD TO INDOOR UNIT CONNECTIN 2-V 2V~ TB2 S3 S2 S RED BLU BRN F6 BRN C6 C62 IC802 T80 F80 R937B R937A F90 INVERTER P.C. BOARD HC9 CN7 CN64 CN643 CN644 CN642 CN93 CN9 3 5 RT62 RT6 RT65 RT68 RT64 MS 3~ W MS 3~ MC U LD70 LD66 DB65 DB6 C63 V RED WHT BLK 3 3 2S4 X63 2CN72 RED 6 WHT M BLK LDW LDV LDU R825 TR82 LEV W V U IPM N P R6 MF. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only (for field wiring). NOTES: SYMBOL NAME R6 CURRENT-DETECTIN RESISTOR SYMBOL NAME LEV EXPANSION VALVE COIL CURRENT-DETECTIN RESISTOR CURRENT-DETECTIN RESISTOR R937A, B TB,TB52 TERMINAL BLOCK SWITCHIN POWER TRANSISTOR MC COMPRESSOR R825 MF SYMBOL NAME CT CURRENT TRANSFORMER C6,62,63 SMOOTHIN CAPACITOR DB6,DB65 DIODE MODULE DSA SURE ABSORBER F6 FUSE (TAL 250V) F70,F80,F90 FUSE (T3.5AL 250V) HC9,IPM INTELLIENT POWER MODULE IC802 INTELLIENT POWER DEVICE L6 REACTOR L62 REACTOR FAN MOTOR CIRCUIT PROTECTION 3. Symbols below indicate. :Terminal block T80 TRANSFORMER TR82 2S4 REVERSIN VALVE COIL X63,X64 RELAY DEFROST THERMISTOR DISCHARE TEMP. THERMISTOR FIN TEMP. THERMISTOR AMBIENT TEMP. THERMISTOR PTC64,PTC65 RT6 RT62 RT64 RT65 OUTDOOR HEAT EXCHANER TEMP. THERMISTOR RT68 OC3J

21 SUZ-KA60VAR2.TH SYMBOL NAME CB~3 SMOOTHIN CAPACITOR CT, 2 CURRENT TRANSFORMER CT6 CURRENT TRANSFORMER F64 FUSE (T2AL 250V) F80 FUSE (T3.5AL 250V) F9 FUSE (TAL 250V) HC9 INTELLIENT POWER MODULE HPS HIH PRESSURE SWITCH IPM INTELLIENT POWER MODULE L REACTOR SYMBOL NAME LEV EXPANSION VALVE MC COMPRESSOR MF FAN MOTOR NOISE FILTER NF NR64 VARISTOR PFC POWER FACTOR CONTROLLER RS~4 RESISTOR RT6 DEFROST THERMISTOR RT62 DISCHARE TEMP. THERMISTOR RT64 FIN TEMP. THERMISTOR SYMBOL NAME RT65 AMBIENT TEMP. THERMISTOR RT68 OUTDOOR HEAT EXCHANER TEMP. THERMISTOR R64A,B RESISTOR R937A, B RESISTOR SSR6 SOLENOID COIL RELAY TB TERMINAL BLOCK TB2 TERMINAL BLOCK T80 TRANSFORMER X64 RELAY 2S4 REVERSIN VALVE COIL NOTES:. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only (for field wiring). 3. Symbols below indicate. :Terminal block OC3J 2

22 SUZ-KA7VA.TH SUZ-KA7VA.TH X64 3 R64A R64B TAB4 RED 2 3 L 4 RED YLW WHT BLU BLK LDE2 CN92 CN902 2 CN903 2 YLW BRN NOISE FILTER P.C.BOARD TO INDOOR UNIT CONNECTIN 2V~ 2-V RN/YLW S3 3 CN6 RED CN CN3 2 PFC POWER SUPPLY ~/N 2V 50Hz CIRCUIT BREAKER RED HPS RED RT65 NR64 CN RS RS3 RS2 RS4 LD9 POWER BOARD RN RT64 F80 RED WHT CB CB2 CB3 BLU WHT BLU NF ELECTRONIC CONTROL P.C.BOARD CN68 2 BLK BLK BLK IPM CT2 CT U RY PNK ORN BLU YLW RED WHT BLK RED BLK HC9 BLK BLK BLK BLK BLK BLK BLK BLK BLK RN RN BLU BLU SSR6 S TB2 CN CN795 6 CN4 2 W 3 CN60 S2 TAB CT CN CN702 2 CN70 LD2 3 LD CN80 CN LDE F9 F64 TB L N PE TAB2 2S4 R S CN2 2 CN5 RT6 RT62 RT68 LEV T80 R937A R937B CN9 V V WHT W MC U MF SYMBOL NAME CB~3 SMOOTHIN CAPACITOR CT, 2 CURRENT TRANSFORMER CT6 CURRENT TRANSFORMER F64 FUSE (T2AL 250V) F80 FUSE (T3.5AL 250V) F9 FUSE (TAL 250V) HC9 INTELLIENT POWER MODULE HPS HIH PRESSURE SWITCH IPM INTELLIENT POWER MODULE L REACTOR LEV EXPANSION VALVE COIL SYMBOL NAME MC COMPRESSOR MF RT6 RT62 RT64 OUTDOOR FAN MOTOR NOISE FILTER NF NR64 VARISTOR POWER FACTOR CONTROLLER PFC R64A,B RESISTOR R937A, B RESISTOR RS~4 RESISTOR DEFROST THERMISTOR DISCHARE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR SYMBOL NAME RT65 AMBIENT TEMPERATURE THERMISTOR RT68 OUTDOOR HEAT EXCHANER TEMPERATURE THERMISTOR SOLENOID COIL RELAY T80 TRANSFORMER SSR6 TB TERMINAL BLOCK TB2 TERMINAL BLOCK X64 RELAY 2S4 REVERSIN VALVE COIL NOTES:. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only (for field wiring). 3. Symbols below indicate. :Terminal block :Connector OC3J

23 8 REFRIERANT SYSTEM DIARAM SUZ-KA25VA.TH SUZ-KA25VAH.TH Unit: mm Refrigerant pipe [9.52 (with heat insulator) Muffler 4-way valve Flared connection Stop valve (with service port) Discharge temperature thermistor RT62 Muffler Compressor Defrost thermistor RT6 Outdoor heat exchanger Ambient temperature thermistor RT65 Flared connection Refrigerant pipe [6.35 (with heat insulator) Capillary tube [3.0 [2.0 0 Stop valve (with strainer) LEV Muffler Strainer #00 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating SUZ-KA25VAR.TH SUZ-KA25VAHR.TH Unit: mm Refrigerant pipe ø9.52 (with heat insulator) Flared connection Muffler Stop valve (with service port) 4-way valve Discharge temperature thermistor RT62 Muffler Compressor Defrost thermistor RT6 Outdoor heat exchanger Outdoor heat exchanger temperature thermistor RT68 Ambient temperature thermistor RT65 Flared connection Refrigerant pipe ø6.35 (with heat insulator) Stop valve (with strainer) Capillary tube ø3.0 ø2.0 0 LEV Strainer #00 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating OC3J 23

24 SUZ-KA35VA.TH SUZ-KA35VAH.TH Unit: mm Refrigerant pipe [9.52 (with heat insulator) 4-way valve Muffler Flared connection Stop valve (with service port) Discharge temperature thermistor RT62 Muffler Compressor Defrost thermistor RT6 Outdoor heat exchanger Ambient temperature thermistor RT65 Capillary tube [3.0 [.8 600( 2) Flared connection Refrigerant pipe [6.35 (with heat insulator) Muffler Stop valve (with strainer) LEV Strainer #00 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating SUZ-KA35VAR.TH SUZ-KA35VAHR.TH Refrigerant pipe ø9.52 (with heat insulator) Flared connection Muffler Stop valve (with service port) 4-way valve Discharge temperature thermistor RT62 Muffler Compressor Defrost thermistor RT6 Capillary tube ø3.0 ø.8 600( 2) Outdoor heat exchanger Outdoor heat exchanger temperature thermistor RT68 Ambient temperature thermistor RT65 Unit: mm Flared connection Refrigerant pipe ø6.35 (with heat insulator) Stop valve (with strainer) Capillary tube ø3.0 ø2.0 0 LEV Strainer #00 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating OC3J

25 SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH Unit: mm Refrigerant pipe [2.7 (SUZ-KA50VA) (with heat insulator) [5.88 (SUZ-KA60VA) 4-way valve Muffler #00 Flared connection Stop valve (with service port) Discharge temperature thermistor RT62 Defrost thermistor RT6 Outdoor heat exchanger Ambient temperature thermistor RT65 Flared connection Refrigerant pipe [6.35 (with heat insulator) SUZ-KA50VAR2.TH Stop valve Strainer Receiver #00 Capillary tube [3.6 [ Compressor LEV Strainer #00 Outdoor heat exchanger temperature thermistor RT68 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating 4-way valve Muffler #00 Unit: mm Refrigerant pipe ø2.7 (with heat insulator) Flared connection Stop valve (with service port) Discharge temperature thermistor RT62 Defrost thermistor RT6 Outdoor heat exchanger Ambient temperature thermistor RT65 Flared connection Refrigerant pipe ø6.35 (with heat insulator) Stop valve (with strainer) Receiver Capillary tube ø3.6 ø Compressor LEV Strainer #00 Outdoor heat exchanger temperature thermistor RT68 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating OC3J 25

26 SUZ-KA60VAR2.TH Refrigerant pipe [5.88 (with heat insulator) 4-way valve Muffler #00 Unit: mm Flared connection Stop valve (with service port) Discharge temperature thermistor RT62 High-pressure switch Defrost thermistor RT6 Outdoor heat exchanger Ambient temperature thermistor RT65 Flared connection Refrigerant pipe [6.35 (with heat insulator) Stop valve Strainer Receiver #00 Capillary tube [3.6 [ Compressor LEV Strainer #00 Outdoor heat exchanger temperature thermistor RT68 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating SUZ-KA7VA.TH SUZ-KA7VA.TH Unit:mm Refrigerant pipe [5.88 (with heat insulator) Capillary tube [.8 [ Oil separator High-pressure 4-way valve switch Flared connection Stop valve (with service port) Strainer Defrost #00 thermistor RT6 Discharge temperature thermistor RT62 Outdoor heat exchanger Ambient temperature thermistor RT65 Refrigerant pipe [9.52 (with heat insulator) Flared connection Strainer Receiver #00 Stop valve Capillary tube [3.6 [ Compressor LEV Strainer #00 Outdoor heat exchanger temperature thermistor RT68 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating OC3J

27 SUZ-KA25VA.TH SUZ-KA25VAH.TH SUZ-KA25VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH SUZ-KA35VAR.TH SUZ-KA35VAHR.TH MAX. REFRIERANT PIPIN LENTH Models SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAH.TH SUZ-KA35VAH.TH SUZ-KA25VAR.TH SUZ-KA35VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VAHR.TH Refrigerant piping Max. length: m A Piping size O.D: mm as Liquid MAX. HEIHT DIFFERENCE Indoor unit (SLZ/SEZ) Max. Height difference 2 m* Refrigerant Piping Max. length A Outdoor unit * Height difference should be within 2 m regardless of the height position at which either indoor or outdoor is placed higher. ADDITIONAL REFRIERANT CHARE (R40A: g) Models SUZ-KA25VA.TH SUZ-KA25VAH.TH SUZ-KA25VAR.TH SUZ-KA25VAHR.TH Outdoor unit precharged m 0 6 m 0 7 m 0 Refrigerant piping length (one way) 8 m 90 9 m 0 m 50 m 80 2 m 3 m 0 4 m 0 5 m 0 m 450 SUZ-KA35VA.TH SUZ-KA35VAH.TH SUZ-KA35VAR.TH SUZ-KA35VAHR.TH, Calculation : Xg=g/mo(Refrigerant piping length(m) 5) OC3J

28 SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA50VAR2.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH MAX. REFRIERANT PIPIN LENTH Model SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA50VAR2.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH Refrigerant piping Max. length: m A Piping size O.D: mm as Liquid MAX. HEIHT DIFFERENCE Indoor unit (SLZ/SEZ) Max. Height difference m* Refrigerant Piping Max. length A Outdoor unit * Height difference should be within m regardless of the height position at which either indoor or outdoor is placed higher. Max. Height difference of SUZ-KA50/60/7VA.TH : 5 m SUZ-KA50/60/7VA.TH : m SUZ-KA50/60VAR2.TH : m ADDITIONAL REFRIERANT CHARE (R40A: g) Model Outdoor unit precharged 7m Refrigerant piping length (one way) 0m 5m m 25m m SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA50VAR2.TH, SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH, Calculation : Xg=g/m o (Refrigerant piping length(m) 7) Model SUZ-KA7VA.TH SUZ-KA7VA.TH Outdoor unit precharged 7m 0m Refrigerant piping length (one way) 5m m 25m m 2, ,5 Calculation : Xg=55g/m o (Refrigerant piping length(m) 7) OC3J

29 9 PERFORMANCE CURVES Model SLZ-KA25VA(L)/SUZ-KA25VA SLZ-KA35VA(L)/SUZ-KA35VA SLZ-KA50VA(L)/SUZ-KA50VA The standard data contained in these specifications applies only to the operation of the air conditioner under normal condition. Operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve. () UARANTEED VOLTAE Rated voltage: ±0% (7 253V), 50Hz (2) AIR FLOW Air flow should be set at MAX. (3) MAIN READINS COOLIN HEATIN () Indoor intake air wet-bulb temperature: W.B. C () Indoor intake air dry-bulb temperature: D.B. C (2) Indoor outlet air wet-bulb temperature: W.B. C (2) Indoor outlet air dry-bulb temperature: D.B. C (3) Outdoor intake air dry-bulb temperature: D.B. C (3) Outdoor intake air wet-bulb temperature: W.B. C (4) Total input: W (4) Total input: W Indoor air wet/dry-bulb temperature difference on the side of the chart on page shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service. How to measure the indoor air wet-bulb/dry-bulb temperature difference. Attach at least 2 sets of wet-and-dry-bulb thermometers to the indoor air inlet as shown in the figure, and at least 2 sets of wet-and-dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high. 2. Attach at least 2 sets of wet-and-dry-bulb thermometers to the outdoor air inlet. Cover the thermometers to prevent direct rays of the sun. 3. Check that the air filter is cleaned. 4. Open windows and doors of the room. 5. Press the EMERENCY OPERATION switch once to start the EMERENCY COOL (HEAT) MODE. 6. When system stabilizes after more than 5 minutes, measure temperature and take an average temperature minutes later, measure temperature again and check that the temperature does not change. INDOOR UNIT OUTDOOR UNIT Wet-and dry-bulb thermometers BACK VIEW OC3J

30 Indoor air Wet-bulb temperature difference (degree) SUZ-KA25VA(H) at Rated frequency Indoor intake air Wet-bulb temperature(:) Indoor intake air Wet-bulb temperature(:) Outdoor intake air Dry-bulb temperature (:) Outdoor intake air Dry-bulb temperature (:) Indoor air Wet-bulb temperature difference (degree) Indoor intake air Wet-bulb temperature(:) Indoor intake air Wet-bulb temperature(:) SUZ-KA35VA(H) at Rated frequency Outdoor intake air Dry-bulb temperature (:) Outdoor intake air Dry-bulb temperature (:) Indoor air Wet-bulb temperature difference (degree) Indoor intake air Wet-bulb temperature(:) Indoor intake air Wet-bulb temperature(:) SUZ-KA50VA at Rated frequency Outdoor intake air Dry-bulb temperature (:) Outdoor intake air Dry-bulb temperature (:) OC3J

31 Indoor air Dry-bulb temperature difference (degree) Indoor intake air Dry-bulb temperature (:) Indoor intake air Dry-bulb temperature (:) SUZ-KA25VA(H) at Rated frequency SUZ-KA35VA(H) at Rated frequency SUZ-KA50VA at Rated frequency Outdoor intake air Wet-bulb temperature (:) Outdoor intake air Wet-bulb temperature (:) NOTE: The above curves are for the heating operation without any frost. Capacity correction factors Correction of Cooling capacity SUZ-KA25VA(H) (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input SUZ-KA25VA(H) SUZ-KA25VA(H) SUZ-KA25VA(H) (Hz) The operational frequency of compressor Capacity correction factors Correction of Heating capacity (Hz) The operational frequency of compressor Input correction factors Correction of Heating total input (Hz) The operational frequency of compressor Capacity correction factors Correction of Cooling capacity SUZ-KA35VA(H) SUZ-KA35VA(H) SUZ-KA35VA(H) SUZ-KA35VA(H) (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input (Hz) The operational frequency of compressor Capacity correction factors Correction of Heating capacity (Hz) The operational frequency of compressor Input correction factors Correction of Heating total input (Hz) The operational frequency of compressor Capacity correction factors Correction of Cooling capacity SUZ-KA50VA SUZ-KA50VA SUZ-KA50VA SUZ-KA50VA (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (Hz) The operational frequency of compressor OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT Capacity correction factors (Hz) The operational frequency of compressor Input correction factors (Hz) The operational frequency of compressor <How to operate fixed-frequency operation (Test run operation)>. Press the EMERENCY OPERATION switch or the Test button to COOL or HEAT mode. 2. Test run operation starts and continues to operate for minutes. 3. Compressor starts at rated frequency in COOL mode or 58 Hz in HEAT mode. 4. Indoor fan operates at High speed. 5. After minutes, test run operation finishes and EMERENCY OPERATION starts. 6. To cancel test run operation (EMERENCY OPERATION), press the EMERENCY OPERATION switch or the ON/OFF button on remote controller. NOTE : The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversion factor is: (MPa [auge]) =0.2 (kgf/cm 2 [auge]) OC3J 3

32 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Both indoor and outdoor units are under the same temperature/humidity condition. 2 Air flow : High speed 3 Operation: TEST RUN OPERATION Dry-bulb temperature Relative humidity(%) SUZ-KA25VA(H) (kgf/f [auge])(mpa [auge]) 4.4 SUZ-KA35VA(H) (kgf/f [auge])(mpa [auge]) 4.4 SUZ-KA50VA (kgf/f [auge])(mpa [auge]) 4.4 Outdoor low pressure Outdoor low pressure Outdoor low pressure ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) 4 SUZ-KA25VA(H) 5 SUZ-KA35VA(H) 9.0 SUZ-KA50VA Outdoor unit current(a) Outdoor unit current(a) Outdoor unit current(a) ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) HEAT operation Condition indoor: Dry bulb temperature.0 C Wet bulb temperature 4.5 C Condition outdoor: Dry bulb temperature 2, 7, 5,.0 C Wet bulb temperature, 6, 2, 4.5 C 3.0 SUZ-KA25VA(H) 4.0 SUZ-KA35VA(H) 7.0 SUZ-KA50VA Outdoor unit current (A) Outdoor unit current (A) Outdoor unit current (A) (:) Ambient temperature( C) (:) Ambient temperature( C) (:) Ambient temperature( C) OC3J

33 Model SEZ-KC25VA/SUZ-KA25VA SEZ-KA35VA/SUZ-KA35VA SEZ-KA50VA/SUZ-KA50VA SEZ-KA60VA/SUZ-KA60VA SEZ-KA7VA/SUZ-KA7VA The standard data contained in these specifications applies only to the operation of the air conditioner under normal condition. Operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve. () UARANTEED VOLTAE Rated voltage: ±0% (7 253V), 50Hz (2) AIR FLOW Air flow should be set at MAX. (3) MAIN READINS COOLIN HEATIN () Indoor intake air wet-bulb temperature: W.B. C () Indoor intake air dry-bulb temperature: D.B. C (2) Indoor outlet air wet-bulb temperature: W.B. C (2) Indoor outlet air dry-bulb temperature: D.B. C (3) Outdoor intake air dry-bulb temperature: D.B. C (3) Outdoor intake air wet-bulb temperature: W.B. C (4) Total input: W (4) Total input: W Indoor air wet/dry-bulb temperature difference on the side of the chart on page shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service. How to measure the indoor air wet-bulb/dry-bulb temperature difference. Attach at least 2 sets of wet-and-dry-bulb thermometers to the indoor air inlet as shown in the figure, and at least 2 sets of wet-and-dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high. 2. Attach at least 2 sets of wet-and-dry-bulb thermometers to the outdoor air inlet. Cover the thermometers to prevent direct rays of the sun. 3. Check that the air filter is cleaned. 4. Open windows and doors of the room. 5. Press the TEST button twice to start the COOL (HEAT) MODE. 6. When system stabilizes after more than 5 minutes, measure temperature and take an average temperature minutes later, measure temperature again and check that the temperature does not change. INDOOR UNIT OUTDOOR UNIT Air outlet Wet-and dry-bulb thermometers Air inlet Wet-and dry-bulb thermometers BACK VIEW te: The picture is SEZ-KA35, 50, 60, 7VA. SEZ-KC25VA is similar to SEZ-KA35, 50, 60, 7VA. OC3J 33

34 Indoor air Wet-bulb temperature difference (degree) SUZ-KA25VA(H) at Rated frequency Indoor intake air Wet-bulb temperature(:) Indoor intake air Wet-bulb temperature(:) Outdoor intake air Dry-bulb temperature (:) Outdoor intake air Dry-bulb temperature (:) Indoor air Wet-bulb temperature difference (degree) Indoor intake air Wet-bulb temperature(:) Indoor intake air Wet-bulb temperature(:) SUZ-KA35VA(H) at Rated frequency Outdoor intake air Dry-bulb temperature (:) Outdoor intake air Dry-bulb temperature (:) Indoor air Wet-bulb temperature difference (degree) SUZ-KA50VA at Rated frequency SUZ-KA60VA at Rated frequency SUZ-KA7VA at Rated frequency Indoor intake air Wet-bulb temperature(:) Outdoor intake air Dry-bulb temperature (:) Indoor intake air Wet-bulb temperature(:) Outdoor intake air Dry-bulb temperature (:) OC3J 34

35 Indoor air Dry-bulb temperature difference (degree) Heating capacity Indoor intake air Dry-bulb temperature (:) Total input (heating) Indoor intake air Dry-bulb temperature (:) SUZ-KA25VA(H) at Rated frequency SUZ-KA35VA(H) at Rated frequency SUZ-KA50VA at Rated frequency SUZ-KA60VA at Rated frequency Outdoor intake air Wet-bulb temperature (:) Outdoor intake air Wet-bulb temperature (:) Indoor air Dry-bulb temperature difference (degree) Heating capacity Indoor intake air Dry-bulb temperature (:) Total input (heating) Indoor intake air Dry-bulb temperature (:) SUZ-KA7VA at Rated frequency Outdoor intake air Wet-bulb temperature (:) Outdoor intake air Wet-bulb temperature (:) NOTE: The above curves are for the heating operation without any frost. OC3J 35

36 Capacity correction factors SUZ-KA25VA(H) SUZ-KA25VA(H) SUZ-KA25VA(H) SUZ-KA25VA(H) Correction of Cooling capacity (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input (Hz) The operational frequency of compressor Capacity correction factors Correction of Heating capacity (Hz) The operational frequency of compressor Input correction factors Correction of Heating total input (Hz) The operational frequency of compressor Capacity correction factors SUZ-KA35VA(H) SUZ-KA35VA(H) SUZ-KA35VA(H) SUZ-KA35VA(H) Correction of Cooling capacity (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (Hz) The operational frequency of compressor Capacity correction factors (Hz) The operational frequency of compressor Input correction factors (Hz) The operational frequency of compressor Capacity correction factors SUZ-KA50VA SUZ-KA50VA SUZ-KA50VA SUZ-KA50VA Correction of Cooling capacity (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (Hz) The operational frequency of compressor Capacity correction factors (Hz) The operational frequency of compressor Input correction factors (Hz) The operational frequency of compressor Capacity correction factors SUZ-KA60VA SUZ-KA60VA SUZ-KA60VA SUZ-KA60VA Correction of Cooling capacity (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (Hz) The operational frequency of compressor Capacity correction factors (Hz) The operational frequency of compressor Input correction factors (Hz) The operational frequency of compressor Capacity correction factors SUZ-KA7VA SUZ-KA7VA SUZ-KA7VA SUZ-KA7VA Correction of Cooling capacity (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input Correction of Heating capacity Correction of Heating total input (Hz) The operational frequency of compressor Capacity correction factors (Hz) The operational frequency of compressor Input correction factors (Hz) The operational frequency of compressor OC3J 36

37 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT <How to operate fixed-frequency operation (Test run operation)>. Press the TEST button to COOL or HEAT mode. 2. Test run operation starts and continues to operate for minutes. 3. Compressor starts at rated frequency in COOL mode or 58Hz in HEAT mode. 4. Indoor fan operates at High speed. 5. After minutes, test run operation finishes and EMERENCY OPERATION starts. 6. To cancel test run operation (EMERENCY OPERATION), press the ON/OFF button on remote controller. NOTE : The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversion factor is: (MPa [auge]) =0.2 (kgf/cm 2 [auge]) OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Both indoor and outdoor units are under the same temperature/humidity condition. 2 Air flow : High speed 3 Operation: TEST RUN OPERATION Dry-bulb temperature Relative humidity(%) Outdoor low pressure SUZ-KA25VA(H) SUZ-KA35VA(H) SUZ-KA50VA SUZ-KA60VA (kgf/f [auge])(mpa [auge]) (kgf/f [auge])(mpa [auge]) (kgf/f [auge])(mpa [auge]) (kgf/f [auge])(mpa [auge]) Outdoor low pressure Outdoor low pressure ( C) ( C) ( C) ( C) (%) (%) (%) (%) Ambient temperature( C) Ambient humidity(%) Ambient temperature( C) Ambient humidity(%) Ambient temperature( C) Ambient humidity(%) Ambient temperature( C) Ambient humidity(%) (kgf/f [auge])(mpa [auge]) 4.4 Outdoor low pressure SUZ-KA7VA ( C) (%) Ambient temperature( C) Ambient humidity(%) Outdoor low pressure SUZ-KA25VA(H) 5 SUZ-KA35VA(H) 0 SUZ-KA50VA 2 SUZ-KA60VA Outdoor unit current(a) Outdoor unit current(a) Outdoor unit current(a) Outdoor unit current(a) ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) 2 SUZ-KA7VA Outdoor unit current(a) ( C) (%) Ambient temperature( C) Ambient humidity(%) OC3J 37

38 HEAT operation Condition indoor: Dry bulb temperature.0 C Wet bulb temperature 4.5 C Condition outdoor: Dry bulb temperature 2, 7, 5,.0 C Wet bulb temperature, 6, 2, 4.5 C 4.0 SUZ-KA25VA(H) 4.0 SUZ-KA35VA(H) 7.0 SUZ-KA50VA 7.0 SUZ-KA60VA Outdoor unit current (A) Outdoor unit current (A) Outdoor unit current (A) Outdoor unit current (A) (:) Ambient temperature( C) (:) Ambient temperature( C) (:) Ambient temperature( C) (:) Ambient temperature( C) SUZ-KA7VA 3.0 Outdoor unit current (A) (:) Ambient temperature( C) OC3J 38

39 PERFORMANCE DATA COOLIN operation at Rated frequency SLZ-KA25VA(L)/SUZ-KA25VA(H) CAPACITY : 2.5(kW) INPUT : 690(W) SHF : 0.86 OUTDOOR D.B.(:) INDOOR INDOOR 2 25 D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 39

40 PERFORMANCE DATA COOLIN operation at Rated frequency SLZ-KA25VA(L)/SUZ-KA25VA(H) CAPACITY : 2.5(kW) INPUT : 690(W) SHF : 0.86 OUTDOOR D.B.(:) INDOOR INDOOR D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 40

41 PERFORMANCE DATA COOLIN operation at Rated frequency SLZ-KA35VA(L)/SUZ-KA35VA(H) CAPACITY : 3.5(kW) INPUT : 060(W) SHF : 0.77 OUTDOOR D.B.(:) INDOOR INDOOR 2 25 D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 4

42 PERFORMANCE DATA COOLIN operation at Rated frequency SLZ-KA35VA(L)/SUZ-KA35VA(H) CAPACITY : 3.5(kW) INPUT : 060(W) SHF : 0.77 OUTDOOR D.B.(:) INDOOR INDOOR D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 42

43 43 OUTDOOR D.B.(:) INDOOR INDOOR 2 25 D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation at Rated frequency SLZ-KA50VA(L)/SUZ-KA50VA CAPACITY : 4.6(kW) INPUT : 6(W) SHF : 0.68 NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J

44 44 OUTDOOR D.B.(:) INDOOR INDOOR D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation at Rated frequency SLZ-KA50VA(L)/SUZ-KA50VA CAPACITY : 4.6(kW) INPUT : 6(W) SHF : 0.68 NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J

45 PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KC25VA/SUZ-KA25VA(H) CAPACITY : 2.5(kW) INPUT : 7(W) SHF : 0.74 OUTDOOR D.B.(:) INDOOR INDOOR 2 25 D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 45

46 PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KC25VA/SUZ-KA25VA(H) CAPACITY : 2.5(kW) INPUT : 7(W) SHF : 0.74 OUTDOOR D.B.(:) INDOOR INDOOR D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 46

47 PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KA35VA/SUZ-KA35VA(H) CAPACITY : 3.5(kW) INPUT : 060(W) SHF : 0.77 OUTDOOR D.B.(:) INDOOR INDOOR 2 25 D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 47

48 PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KA35VA/SUZ-KA35VA(H) CAPACITY : 3.5(kW) INPUT : 060(W) SHF : 0.77 OUTDOOR D.B.(:) INDOOR INDOOR D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 48

49 49 OUTDOOR D.B.(:) INDOOR INDOOR 2 25 D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KA50VA/SUZ-KA50VA CAPACITY : 5.0(kW) INPUT : 780(W) SHF : 0.75 NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J

50 50 OUTDOOR D.B.(:) INDOOR INDOOR D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KA50VA/SUZ-KA50VA CAPACITY : 5.0(kW) INPUT : 780(W) SHF : 0.75 NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J

51 5 OUTDOOR D.B.(:) INDOOR INDOOR 2 25 D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KA60VA/SUZ-KA60VA CAPACITY : 5.5(kW) INPUT : 960(W) SHF : 0.75 NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J

52 52 OUTDOOR D.B.(:) INDOOR INDOOR D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KA60VA/SUZ-KA60VA CAPACITY : 5.5(kW) INPUT : 960(W) SHF : 0.75 NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J

53 PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KA7VA/SUZ-KA7VA CAPACITY : 7.(kW) INPUT : 60(W) SHF : 0.74 INDOOR INDOOR D.B.(:) W.B.(:) OUTDOOR D.B.(:) 2 25 Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 53

54 PERFORMANCE DATA COOLIN operation at Rated frequency SEZ-KA7VA/SUZ-KA7VA CAPACITY : 7.(kW) INPUT : 60(W) SHF : 0.74 OUTDOOR D.B.(:) INDOOR INDOOR D.B.(:) W.B.(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature OC3J 54

55 PERFORMANCE DATA HEATIN operation SLZ-KA25VA(L)/SUZ-KA25VA(H) CAPACITY : 3.0(kW) INPUT : 8(W) INDOOR 5 0 D.B.(:) Q INPUT Q INPUT at Rated frequency Q INPUT OUTDOOR W.B.(:) 0 5 Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT SLZ-KA35VA(L)/SUZ-KA35VA(H) at Rated frequency CAPACITY : 4.0(kW) INPUT : 00(W) OUTDOOR W.B.(:) INDOOR D.B.(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT SLZ-KA50VA(L)/SUZ-KA50VA at Rated frequency CAPACITY : 5.0(kW) INPUT : 550(W) INDOOR D.B.(:) Q INPUT OUTDOOR W.B.(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT OC3J 55

56 SEZ-KC25VA/SUZ-KA25VA(H) at Rated frequency CAPACITY : 3.0(kW) INPUT : 8(W) OUTDOOR W.B.(:) INDOOR D.B.(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT SEZ-KA35VA/SUZ-KA35VA(H) at Rated frequency CAPACITY : 4.0(kW) INPUT : 00(W) OUTDOOR W.B.(:) INDOOR D.B.(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT SEZ-KA50VA/SUZ-KA50VA at Rated frequency CAPACITY : 5.9(kW) INPUT : 840(W) OUTDOOR W.B.(:) INDOOR D.B.(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT SEZ-KA60VA/SUZ-KA60VA at Rated frequency CAPACITY : 6.9(kW) INPUT : 50(W) OUTDOOR W.B.(:) INDOOR D.B.(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q Q INPUT INPUT Q Q INPUT INPUT SEZ-KA7VA/SUZ-KA7VA at Rated frequency CAPACITY : 8.(kW) INPUT : 2360(W) OUTDOOR W.B.(:) INDOOR D.B.(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT OC3J 56

57 0 ACTUATOR CONTROL SUZ-KA25VA(H) SUZ-KA35VA(H) SUZ-KA50VA SUZ-KA60VA SUZ-KA7VA 0-. Outdoor fan motor control The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 5 seconds after the compressor has stopped running. Compressor Outdoor fan ON OFF ON OFF 5 seconds 5 seconds 0-2. R.V. coil control Heating... ON Cooling... OFF Dry... OFF <COOL> NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor. <HEAT> 5 seconds 5 seconds ON Compressor OFF R.V.coil ON OFF ON or OFF ON or OFF Outdoor fan ON motor OFF 0-3. Relation between main sensor and actuator SUZ-KA25VA(H).TH SUZ-KA35VA(H).TH Sensor Discharge temperature thermistor Purpose Protection Compressor LEV Actuator Outdoor fan motor RV-coil Indoor fan motor Defrost heater Indoor pipe temperature thermistor Cooling: Coil frost prevention Heating: High pressure protection Defrost thermistor Cooling: High pressure protection Heating: Defrosting Fin temperature thermistor Protection Ambient temperature thermistor Cooling: Low ambient temperature operation Heating: Defrosting (Heater) SUZ-KA25VA(H)R.TH Sensor SUZ-KA35VA(H)R.TH Purpose Compressor LEV Actuator Outdoor fan R.V.coil motor Indoor fan motor Defrost heater Discharge temperature thermistor Protection Indoor coil temperature thermistor Cooling: Coil frost prevention Heating: High pressure protection Defrost thermistor Heating: Defrosting Fin temperature thermistor Protection Ambient temperature Cooling: Low ambient temperature operation thermistor Heating: Defrosting (Heater) Outdoor heat exchanger temperature thermistor OC3J Cooling: Low ambient temperature operation Cooling: High pressure protection 57

58 SUZ-KA50VA/VA/VAR2.TH SUZ-KA60VA/VA/VAR2.TH SUZ-KA7VA/VA.TH Sensor Discharge temperature thermistor Indoor pipe temperature thermistor Defrost thermistor Fin temperature thermistor Ambient temperature thermistor Outdoor heat exchanger temperature Purpose Protection Cooling: Coil frost prevention Heating: High pressure protection Heating: Defrosting Protection Protection Cooling: High pressure protection Compressor Actuator Outdoor LEV fan motor 4-way valve SERVICE FUNCTIONS SUZ-KA25VA(H) SUZ-KA35VA(H) CHANE IN DEFROST SETTIN <JS> When the JS wire of the outdoor Inverter P.C. board is cut/ soldered, the defrost finish temperature is changed. (Refer to 2-6- SUZ-KA25/35VA(H).TH) (Refer to SUZ-KA25/35VA(H)R.TH) Defrost finish temperature Jumper wire SUZ-KA25VA SUZ-KA25VAH SUZ-KA35VA SUZ-KA35VAH Soldered (Initial setting) 5 C 8 C 0 C 3 C 0 C JS ne (cut) 8 C 5 C 3 C 5 C 3 C Serial. Up to 9XP002 Up to 67P003 From 68P0033 Defrost finish temperature Jumper wire SUZ-KA25VA SUZ-KA25VAH SUZ-KA35VA SUZ-KA35VAH Soldered 8 C JS ne (Initial setting) 5 C Serial. From 9YP00 2 TROUBLESHOOTIN SUZ-KA25VA(H) SUZ-KA35VA(H) SUZ-KA50VA SUZ-KA60VA SUZ-KA7VA 2-. Cautions on troubleshooting. Before troubleshooting, check the following: ) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care the following during servicing. ) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and turn off the breaker. 2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board. 3) When removing the electrical parts, be careful of the residual voltage of smoothing capacitor. 4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components. 5) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. Lead wire Housing point 3. Troubleshooting procedure ) First, check if the OPERATION INDICATOR lamp is blinking on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is blinking on and off before starting service work. 2) Before servicing check that the connector and terminal are connected properly. 3) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration. 4) When troubleshooting, refer to "2-2. Failure mode recall function" and "2-3. Troubleshooting check table". OC3J 58

59 2-2. Failure mode recall function As this air conditioner has a function to memorize all the failures that had happened, the latest failure detail can be recalled by following the procedures below. Use this function when the check code is not displayed with wired remote controller or the remote controller at use is wireless type Flow chart of the indoor/outdoor unit failure mode recall function Operational procedure (For wireless remote controller) Setting up the failure mode recall function Turn ON the power supply. While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time, press RESET button. 2 First, release RESET button. And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds. AUTO COOL HEAT DRY TOO TOO FAN VANE COOL SELECT TIME RESET While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time, press RESET button. 2 First, release RESET button. And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds. * Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed). Does OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: Either indoor or outdoor unit is abnormal. Beep sounds are emitted at the same timing of the blinking of OPERATION INDICATOR lamp. *2 Judgment of indoor/outdoor abnormality (Blinks) Before blinking, does POWER lamp stay ON for 3 seconds? Stays ON for 3 seconds (without beep): The outdoor unit is abnormal. (OFF) ON/OFF TOO WARM h TOO COOL *. Regardless of normal or abnormal, a short beep is emitted once as the signal is received. Indoor unit is normal. There is a possibility that the plasma or outdoor unit is abnormal. Confirm the failure detail on the LED display of the outdoor controller board.(refer to Outdoor unit failure mode table.) The indoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point. Make sure to check at least two consecutive blinking cycles. *2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures. With the remote controller headed towards the indoor unit, press any button that is not used in this failure mode recall function (e.g. TIMER button). OR Turn OFF the power supply and turn ON it again. 2Press RESET button of the remote controller. The outdoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point (Refer to Failure mode table (Wireless remote controller/ Wired remote controller) ). Make sure to check at least two consecutive blinking cycles. *3 OPERATION INDICATOR lamp Repair the defective parts. tes. Make sure to release the failure mode recall function once it is set up, otherwise the unit cannot operate properly. 2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized. *2. Blinking pattern when the indoor unit is abnormal: [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION INDICATOR lamp blink pattern Self-check starts (Start signal received) Off Approx. 2.5 s st 2 nd 3 rd n th st 2 nd On 0.5 s On 0.5 s On 0.5 s On 0.5 s *3. Blinking pattern when the outdoor unit is abnormal:[output pattern B] Beeper sounds OPERATION INDICATOR lamp blink pattern Off Approx. 2.5 s Number of blinks/beeps in pattern indicates the check code in the next page (i.e., n=5 for P5 ) On 0.5 s On 0.5 s Repeated Number of blinks/beeps in pattern indicates the check code in the next page Beep Beep Beep Beep Beep Beep Beep st 2 nd 3 rd n th st 2 nd Repeated Off Self-check Approx. 2.5 s starts (Start signal received) On Approx. 3 s On 0.5 s On 0.5 s On 0.5 s On 0.5 s Off Approx. 2.5 s Number of blinks/beeps in pattern indicates the check code in the next page (i.e., n=5 for U2 ) On Approx. 3 s On 0.5 s On 0.5 s Number of blinks/beeps in pattern indicates the check code in the next page OC3J 59

60 Wired remote controller B E D C C TEMP. MENU ON/OFF C SIMPLE ON/OFF FILTER A CHECK button B Refrigerant address C TEMP. button D IC: Indoor unit OC: Outdoor unit E Check code Turn on the power. 2 Press the [CHECK] button twice. 3 Set refrigerant address with [TEMP] button if system control is used. 4 Press the [ON/OFF] button to stop the self-check. BACK MONITOR/SET DAY CHECK TEST PAR-2MAA CLOCK OPERATION CLEAR A Failure mode table (Wireless remote controller/wired remote controller) [Output pattern A] Errors detected by indoor unit Wired remote controller Wireless remote controller Check code Beeper sounds/operation INDICATOR lamp blinks Symptom (Number of times) P Intake sensor error P2 Pipe (TH2) sensor error 2 P9 Pipe (TH5) sensor error E6,E7 3 Indoor/outdoor unit communication error P4 4 Drain sensor error/float switch connector open P5 5 Drain pump error P6 6 Freezing/Overheating protection operation EE 7 Communication error between indoor and outdoor units P8 8 Pipe temperature error E4, E5 9 Remote controller signal receiving error 0 Fb 2 Indoor unit control system error (memory error, etc.) E0, E3 Remote controller transmission error E, E2 Remote controller control board error [Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.) Wired remote controller Wireless remote controller Check code E9 UP U3,U4 UF U2 U,Ud U5 U8 U6 U7 U9,UH Others Beeper sounds/operation INDICATOR lamp blinks (Number of times) Symptom Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit) Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked) Abnormal high discharging temperature/insufficient refrigerant Abnormal high pressure (63H worked)/overheating protection operation Abnormal temperature of heat sink Outdoor unit fan protection stop Compressor overcurrent interruption/abnormal of power module Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/current sensor error Other errors Remark Remark For details, check the LED display of the outdoor controller board. If the beeper does not sound again after the initial two beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not come on, there are no error records. If the beeper sounds three times continuously beep, beep, beep ( seconds) after the initial two beeps to confirm the self-check start signal was received, the specified refrigerant address is incorrect. On wireless remote controller The continuous buzzer sounds from receiving section of indoor unit. Blink of operation lamp On wired remote controller Check code displayed in the LCD. OC3J 60

61 Outdoor unit failure mode table SUZ-KA25VA(H) SUZ-KA35VA(H) (Except for SUZ-KA25/35VA(H)R.TH) LED indication (Outdoor unit) -time flash every 2.5 seconds 2-time flash 2.5 seconds OFF Abnormal point (Failure mode) Details of abnormal Detection method Check point Outdoor thermistors Discharge temperature When thermistors short or open during Check the outdoor thermistors Defrost thermistor compressor running. Ambient temperature thermistor 3-time flash 2.5 seconds OFF 4-time flash 2.5 seconds OFF 5-time flash Outdoor control 2.5 seconds OFF system Fin temperature thermistor P.C. board temperature thermistor nvolatile memory data When nonvolatile memory data cannot be read properly, unit stops. te: Defective outdoor thermistors can be identified by checking the blinking pattern of LED. Replace the inverter P.C. board. 7-time flash Fin temperature/p.c. Fin 2.5 seconds OFF board temperature temperature/p.c. board overheat temperature overheat protection When fin temperature exceeds 83: (SUZ-KA25VA(H))/82: (SUZ-KA35VA(H)), or P.C. board temperature exceeds 85: (SUZ-KA25VA(H))/8: (SUZ-KA35VA(H)). Check around outdoor unit. Check outdoor unit air passage. Check the outdoor fan motor. 8-time flash Converter control 2.5 seconds OFF system 9-time flash 2.5 seconds OFF DC voltage Compressor each phase current When DC voltage of inverter cannot be detected normally. When compressor each phase current cannot be detected normally. Check the inverter/compressor. 0-time flash Overcurrent protection Compressor open-phase 2.5 seconds OFF protection -time flash Overcurrent protection Overcurrent protection 2.5 seconds OFF 2-time flash 2.5 seconds OFF Lighting Refrigerant system High pressure protection Low discharge temperature Compressor synchronous abnormality (Compressor start-up failure protection) Discharge temperature overheat protection High pressure protection (Overheat protection) Low discharge temperature protection When 4A (SUZ-KA25VA(H))/A Reconnect compressor connector. (SUZ-KA35VA(H)) current flow into Check the inverter/compressor. intelligent power module (IPM). When the open-phase protection of compressor is detected. When the interphase short out occurs in the output of the intelligent power module (IPM). When the compressor winding shorts out. When 4A (SUZ-KA25VA(H))/A (SUZ- KA35VA(H)) current flow into intelligent power module (IPM). When waveform of compressor current is distorted. When discharge temperature exceeds 6:. When the indoor coil thermistor (TH5) exceeds 70: in HEAT mode. When the defrost thermistor exceeds 70:in COOL mode. When discharge temperature has been 50: or less for minutes. Reconnect compressor connector. Check the inverter/compressor. Check the stop valve. Reconnect compressor connector. Check the inverter/compressor. Check the refrigerant circuit and refrigerant amount. Check the LEV. Check the outdoor thermistors. Check refrigerant circuit and refrigerant amount. Check the stop valve. Check the refrigerant circuit and refrigerant amount. Check the LEV. Outdoor fan Outdoor fan protection When outdoor fan has stopped within seconds 3 times in a row after outdoor fan start-up, unit stops. Check the outdoor fan motor. Check the inverter P.C. board. Outdoor power system* Outdoor power system When it consecutively occurs 3 times that the compressor stops for overcurrent protection or start-up failure protection within minute after start-up. Reconnect compressor connector. Check the inverter/compressor. Check the stop valve. *Operation indicator lamp of the indoor unit (only the wireless remote controller use model) blinks twice. Refer to *3. Bliking pattern when the outdoor unit is abnormal: [Output pattern B] in 2-2-, and [Outdoor pattern B] in OC3J 6

62 SUZ-KA50VA SUZ-KA60VA SUZ-KA7VA (Except for SUZ-KA50VAR2.TH) Outdoor LED indication Abnormal point LED LED2 (Failure mode) Lighting Once Outdoor thermistors Twice Details of abnormal Detecting method Check point Discharge temperature thermistor When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor Check the outdoor thermistors. after 0 minutes of compressor start-up. Defrost thermistor When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 5 minutes of compressor start-up. Ambient temperature thermistor When a short or open circuit is detected in the thermistor during operation. 3 times 4 times 9 times 5 times 6 times Outdoor control system EEPROM Converter control system Fin temperature thermistor P.C. board temperature thermistor Outdoor heat exchanger temperature thermistor Communication error between P.C. boards Replace the outdoor electronic control P.C. board. When a short circuit is detected in the Check the outdoor thermistors. thermistor during operation, or when an open circuit is detected in the thermistor after 5 minutes (in cooling) and 0 minutes (in heating) of compressor start-up. When nonvolatile memory data cannot Replace the outdoor electronic be read properly, unit stops. control P.C. board. When the communication between Check the connecting wire boards protection stop is continuously between outdoor electronic performed twice. control P.C. board and power board. 5 times 6 times 7 times oes out oes out Communication between Communication error occurs between P.C. boards protection the electronic control P.C.board and power board for more than 0 seconds. Current sensor Current sensor protection stop is continuously performed twice. Current sensor protection When a short or open circuit is detected in the current sensor during compressor operating. Zero cross detecting circuit The protection stop of the zero cross detecting circuit is continuously performed 0 times. Zero cross detecting When zero cross signal cannot be circuit protection detected while the compressor is operating. Converter protection When a failure is detected in the operation of the converter during operation. Bus-bar voltage protection () When the bus-bar voltage exceeds 400 V, or falls to 0 V or below during compressor operating. Bus-bar voltage protection (2) When the bus-bar voltage exceeds te: Even if this protection 400 V, or falls to 50 V or below during stop is performed compressor operating. continuously 3 times, it does not mean the abnormality in outdoor power system. Replace the power board. Check the connecting wire among electronic control P.C. board, noise filter P.C. board and power board. Replace the power board. OC3J 62

63 Outdoor LED indication Abnormal point Details of abnormal Detecting method Check point LED LED2 (Failure mode) Once oes out Overcurrent protection IPM protection When overcurrent is detected after seconds of compressor start-up. Lock protection When overcurrent is detected within seconds after the compressor gets started. 3 times oes out 4 times oes out Fin temperature/p.c. board temperature overheat Fin temperature overheat protection P.C.boad temperature overheat protection When the fin temperature exceeds 87: during operation. When the P.C. board temperature exceeds 70: during operation. Check the connection of the compressor connecting wire. Check the inverter/ compressor. Check the stop valve. Check around outdoor unit. Check outdoor unit air passage. Check the outdoor fan motor. Lighting Lighting Refrigerant system Discharge temperature overheat protection When discharge temperature exceeds 6:. Check refrigerant circuit and refrigerant amount. Check the LEV. Check the outdoor thermistors. High pressure protection Low discharge temperature Outdoor fan Outdoor power system HPS protection High pressure protection (Overheat protection) Low discharge temperature protection Outdoor fan protection Outdoor power system When high-pressure is detected with the high-pressure switch (HPS) during operation. When the indoor coil thermistor (TH5) exceeds 70: in HEAT mode. When the outdoor heat exchanger thermistor exceeds 70: in COOL mode. When the frequency of the compressor is kept 80Hz or more and discharge temperature is kept under 39: for more than minutes. When outdoor fan has stopped within seconds 3 times in a row after outdoor fan start -up,unit stops. When IPM protection stop or lock protection stop is continuously performed 3 times within minute after the compressor get started, or when converter protection stop or bus-bar voltage protection stop is continuously performed 3 times within 3 minutes after start-up. Check refrigerant circuit and refrigerant amount. Check the stop valve. Check refrigerant circuit and refrigerant amount. Check the LEV. Check the outdoor fan motor. Reconnect compressor connector. Check the inverter/ compressor. Check the stop valve. Check the PAM module. OC3J 63

64 SUZ-KA25VA(H)R.TH SUZ-KA35VA(H)R.TH SUZ-KA50VAR2.TH Abnormal point (Failure mode/protection) LED indication (Outdoor P.C. board) Condition Correspondence ne (rmal) Outdoor power system Overcurrent protection stop is continuously performed 3 times within minute after the compressor gets started. Reconnect connectors. Refer to 2-5. a "How to check inverter/compressor". Check stop valve. Discharge temperature thermistor Defrost thermistor -time flash every 2.5 seconds Fin temperature thermistor 3-time flash 2.5 seconds OFF P.C. board temperature thermistor Ambient temperature thermistor Overcurrent 4-time flash 2.5 seconds OFF 2-time flash 2.5 seconds OFF -time flash 2.5 seconds OFF Thermistor shorts or opens during compressor running. Refer to 2-5. g "Check of outdoor thermistors". Defective outdoor thermistors can be identified by checking the blinking pattern of LED. Large current fl ows into intelligent power module. Reconnect compressor connector. Refer to 2-5. a "How to check inverter/compressor". Check stop valve. Compressor synchronous abnormality (Compressor startup failure protection) 2-time flash 2.5 seconds OFF Waveform of compressor current is distorted. Reconnect compressor connector. Refer to 2-5. a "How to check inverter/compressor". Discharge temperature Temperature of discharge temperature thermistor exceeds 6 C, compressor stops. Compressor can restart if discharge temperature thermistor reads 00 C or less 3 minutes later. Check refrigerant circuit and refrigerant amount. Refer to 2-5. k "Check of LEV". High pressure Temperature indoor coil thermistor exceeds 70 C in HEAT mode. Temperature defrost thermistor exceeds 70 C in COOL mode. Check refrigerant circuit and refrigerant amount. Check stop valve. Fin temperature/p.c. board temperature 7-time flash 2.5 seconds OFF Temperature of fi n temperature thermistor on the inverter P.C. board exceeds 75 to 80 C, or temperature of P.C. board temperature thermistor on the inverter P.C. board exceeds 70 to 75 C. Check around outdoor unit. Check outdoor unit air passage. Refer to 2-5. i "Check of outdoor fan motor". Outdoor fan motor nvolatile memory data 5-time flash 2.5 seconds OFF Outdoor fan has stopped 3 times in a row within seconds after outdoor fan start-up. nvolatile memory data cannot be read properly. Refer to 2-5. i "Check of outdoor fan motor". Refer to 2-5. n "Check of inverter P.C. board". Replace the inverter P.C. board. Discharge temperature Temperature of discharge temperature thermistor has been 50 C or less for minutes. Refer to 2-5. k "Check of LEV". Check refrigerant circuit and refrigerant amount. DC voltage 8-time flash 2.5 seconds OFF DC voltage of inverter cannot be detected normally. Refer to 2-5. a "How to check inverter/compressor". Each phase current of compressor 9-time flash 2.5 seconds OFF Each phase current of compressor cannot be detected normally. Overcurrent Compressor openphase 0-time flash 2.5 seconds OFF Large current fl ows into intelligent power module (IPM). The open-phase operation of compressor is detected. The interphase short out occurs in the output of the intelligent power module (IPM). The compressor winding shorts out. Reconnect compressor connector. Refer to 2-5. a "How to check inverter/compressor". Stop valve (Closed valve) 4-time flash 2.5 seconds OFF Closed valve is detected by compressor current. Check stop valve NOTE: Blinking patterns of this mode differ from the ones of 2-3.Troubleshooting check table. OC3J 64

65 2-3. Troubleshooting check table SUZ-KA25VA(H) SUZ-KA35VA(H) (Except for SUZ-KA25/35VA(H)R.TH). 2 3 NOTE. The location of LED is illustrated at the right figure. Refer to "2-6-. Inverter P.C. board". 2. LED lights up during normal operation. Symptom LED indication Abnormal point/ Condition Detection method Check point Outdoor unit does not operate -time flash every 2.5 seconds Outdoor power system Outdoor thermistors Outdoor control system When it consecutively occurs 3times that the compressor stops for overcurrent protection or start-up failure protection within minute start-up. When discharge temperature thermistor, fin temperature thermistor, defrost thermistor, P.C. board temperature thermistor or ambient temperature thermistor shorts or opens during compressor running. When nonvolatile memory data cannot be read properly, compressor stops. Inverter P.C. board (Parts side) Flashing LED Check stop valve. Reconnect connector of compressor. Refer to 2-5.A "How to check inverter/ compressor". Refer to 2-5. "Check of outdoor thermistors". Replace inverter P.C. board 'Outdoor unit stops and restarts 3 minutes later' is repeated 6-time flash 2.5 seconds OFF 4-time flash 2.5 seconds OFF 2-time flash 2.5 seconds OFF 3-time flash 2.5 seconds OFF Serial signal Outdoor unit (Other abnormality) Overcurrent protection Discharge temperature overheat protection When the communication failure between the indoor and outdoor unit for 3 minutes. When outdoor unit is defective. When 4A (SUZ-KA25VA(H))/A (SUZ-KA35VA(H)) current flows into intelligent power module. When discharge temperature thermistor exceeds 6:, compressor stops. Compressor can restart if discharge temperature thermistor reads 00: or less 3 minutes later. Refer to 2-5.O "How to check mis-wiring and serial signal error". Refer to "Failure mode table". Check [output pattern B] Check stop valve. Reconnect connector of compressor. Refer to 2-5.A "How to check inverter/compressor". Check refrigerant circuit and refrigerant amount. Refer to 2-5.L "Check of LEV" Outdoor unit operates Outdoor unit operates 4-time flash 2.5 seconds OFF 5-time flash 2.5 seconds OFF -time flash 2.5 seconds OFF 3-time flash 2.5 seconds OFF 4-time flash 2.5 seconds OFF 7-time flash 2.5 seconds OFF Fin temperature /P.C. board temperature thermistor overheat protection High pressure protection 8-time flash 2.5 seconds OFF Compressor synchronous abnormality 0-time flash 2.5 seconds OFF 2-time flash 2.5 seconds OFF 3-time flash 2.5 seconds OFF 8-time flash 2.5 seconds OFF 9-time flash 2.5 seconds OFF Outdoor fan Each phase current of compressor Frequency drop by current protection Frequency drop by high pressure protection Frequency drop by defrosting in COOL mode Frequency drop by discharge temperature protection Low discharge temperature protection PAM protection PAM: Pulse Amplitude Modulation Inverter check mode When temperature of fin temperature thermistor on the heat sink exceeds 83: (SUZ-KA25VA(H))/82: (SUZ-KA35VA(H)) or temperature of P.C. board temperature thermistor exceeds 85: (SUZ-KA25VA(H))/8: (SUZ-KA35VA(H)), compressor stops and restarts 3 minutes later. When indoor coil thermistor exceeds 70: in HEAT mode. When the defrost thermistor exceeds 70: in COOL mode. When the waveform of compressor current is distorted. When outdoor fan has stopped within seconds 3 times a row after outdoor fan start-up, unit stops. When compressor each phase current cannot be detected normally When current from power outlet exceeds 6.A (SUZ-KA25VA(H))/9.2A (SUZ-KA35VA(H)), compressor frequency lowers. When indoor coil thermistor exceeds 55: in HEAT mode, compressor frequency lowers. When indoor coil thermistor reads 8: or less in COOL mode, compressor frequency lowers. When discharge temperature thermistor exceeds :, compressor frequency lowers. When discharge temperature has been 50: or less for minutes. When the overcurrent flows into IBT (Insulated ate Bipolar transistor : TR82) or when the bus-bar voltage reaches 3V or more, PAM stops and restarts. When the connector of compressor is disconnected, inverter check mode starts. Check around outdoor unit. Check outdoor unit air passage. Refer to 2-5.I "Check of outdoor fan motor". Check refrigerant circuit and refrigerant amount. Check stop valve. Reconnect connector of compressor. Refer to 2-5.A "How to check inverter/compressor". Refer to 2-5.I "Check of outdoor fan motor. Refer to 2-5.N "Check of inverter P.C. board. Refer to 2-5.A "How to check inverter/compressor". DC voltage When DC voltage of inverter cannot be detected normally. Refer to 2-5.A "How to check inverter/compressor". The unit is normal, but check the following. Check if indoor filters are clogged. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled. Check refrigerant circuit and refrigerant amount. Refer to 2-5.L "Check of LEV". Refer to 2-5. "Check of outdoor thermistors". Refer to 2-5.L "Check of LEV". Check refrigerant circuit and refrigerant amount. This is not malfunction. PAM protection will be activated in the following cases; Instantaneous power voltage drop (Short time power failure) 2 When the power supply voltage is high. Check if the connector of the compressor is correctly connected. Refer to 2-5.A "How to check inverter/ compressor". The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF. (Example) When the flashing frequency is second ON 0.5-second ON ON OFF 2.5-second OFF 2.5-second OFF OC3J 65

66 SUZ-KA50VA SUZ-KA60VA SUZ-KA7VA (Except for SUZ-KA50VAR2.TH). Symptom Outdoor unit does not operate. Indication LED (Red) LED2 (Yellow) Abnormal point/condition Lightning Twice Outdoor power system Condition Correspondence When IPM protection stop or lock protection stop is continuously Check the connection of the compressor performed three times within minute after the compressor gets connecting wire. started, or when converter protection stop or bus-bar voltage Refer to 2-5.U "How to check inverter/ protection stop is continuously performed three times within 3 minutes compressor". after start-up. Check the stop valve. 2 Lightning 3 times Discharge temperature thermistor When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 0 minutes of compressor start-up. Refer to 2-5.V "Check of outdoor thermistor". 3 Lightning 4 times Fin temperature thermistor P.C board temperature thermistor When a short or open circuit is detected in the thermistor during operation. Refer to 2-5.V "Check of outdoor thermistor". Replace the outdoor electronic control P.C. board. Ambient temperature thermistor When a short or open circuit is detected in the thermistor during operation. 4 Lightning 5 times Outdoor heat exchanger temperature thermistor When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 5 minutes (in cooling) and 0 minutes (in heating) of compressor start-up. Refer to 2-5.V "Check of outdoor thermistor". Defrost thermistor When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 5 minutes of compressor start-up. 5 6 Lightning 6 times Serial signal Lightning 7 times nvolatile memory data When the communication fails between the indoor and outdoor unit for 3 minutes. When the nonvolatile memory data cannot be read properly. Refer to 2-5.R "How to check mis-wiring and serial signal error". Replace the outdoor electronic control P.C. board Lightning 8 times Current sensor Current sensor protection stop is continuously performed twice. Replace the power board. Lightning times Communication error between P.C. boards Lightning 2 times Zero cross detecting circuit 'Outdoor unit stops and IPM protection restarts 3 minutes later' Twice oes out is repeated. Lock protection 3 times oes out Discharge temperature protection When the communication protection stop between boards is continuously performed twice. The protection stop of the zero cross detecting circuit is continuously performed 0 times. When over-current is detected after seconds of compressor start-up. When over-current is detected within seconds of compressor start-up. When temperature of discharge temperature thermistor exceeds 6:, compressor stops. Compressor can restart if discharge temperature thermistor reads 00: or less 3 minutes later. Check the connecting wire between outdoor electronic control P.C. board and power board. Check the connecting wire among outdoor electronic control P.C. board, noise filter P.C. board and power board. Reconnect compressor connector. Refer to 2-5.U "How to check inverter/ compressor". Check the stop valve. Check the power module (PAM module). Check the amount of gas and refrigerant circuit. Refer to 2-5.T "Check of LEV" Fin temperature protection 4 times oes out P.C. board temperature protection When the fin temperature exceeds 87: during operation. When the P.C. board temperature exceeds 70: during operation. When high-pressure is detected with the high-pressure switch (HPS) during operation. 5 times oes out High-pressure protection When the outdoor heat exchanger temperature exceeds 70: during cooling or when indoor gas pipe temperature exceeds 70: during heating. 8 times oes out Converter protection When a failure is detected in the operation of the converter during operation. Replace the power board. Bus-bar voltage When the bus-bar voltage exceeds 400V or falls to 0V or below Replace the power board. protection () during compressor operating. 9 times oes out Bus-bar voltage When the bus-bar voltage exceeds 400V or falls to 50V or below protection (2) during compressor operating. Check refrigerant circuit and refrigerant amount. Refer to 2-5.T "Check of LEV". Check around of gas and the refrigerant circuit. Check of stop valve. 6 3 times oes out Outdoor fan motor When failure occurs continuously three times within seconds after the fan gets started. Refer to 2-5.W "Check of outdoor fan motor". 7 Lighting 8 times Current sensor protection When a short or open circuit is detected in the current sensor during compressor operating. Replace the power board. 8 Lighting times Communication between Communication error occurs between the outdoor electronic control Check the connecting wire between outdoor P.C. boards protection P.C. board and power board for more than 0 seconds. electronic control P.C. board and power board. 9 Lighting 2 times Zero cross detecting When zero cross signal cannot be detected while the compressor is Check the connecting wire among outdoor circuit protection operating. electronic control P.C. board, noise filter P.C. board and power board. NOTE. The location of LED is illustrated at the right figure. Outdoor electronic control P.C. board (Parts side) 2. LED is lighted during normal operation. LED2 LED The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF. (Example) When the flashing frequency is second ON 0.5-second ON Lighting ON OFF OC3J 2.5-second OFF 2.5-second OFF 66

67 . 2 Symptom Outdoor unit operates. Indication LED (Red) LED2 (Yellow) Once Lighting Twice Lighting Abnormal point/condition Primary current protection Secondary current protection High-pressure protection Defrosting in cooling Condition When the input current exceeds 5A. When the current of the compressor exceeds 5A. When the indoor gas pipe temperature exceeds 45: during heating. When the indoor gas pipe temperature falls 3: or below during cooling. Correspondence These symptoms do not mean any abnormality of the product, but check the following points. Check if indoor filters are clogged. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled. 3 times Lighting Discharge temperature protection When the discharge temperature exceeds 00: during operation. Check refrigerant circuit and refrigerant amount. Refer to 2-5.T "Check of LEV". Refer to 2-5.V "Check of outdoor thermistors" times Lighting Low discharge temperature protection When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 39: for more than minutes. Refer to 2-5.T "Check of LEV". Check refrigerant circuit and refrigerant amount. 5 times Lighting Cooling high-pressure protection When the outdoor heat exchanger temperature exceeds 58: during operation. This symptom does not mean any abnormality of the product, but check the following points. Check if indoor filters are clogged. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled. 25 Outdoor unit operates 9 times Lighting Inverter check mode When the unit is operated with emergency operation switch. - Lighting Lighting rmal - - OC3J 67

68 SUZ-KA25VA(H)R.TH SUZ-KA35VA(H)R.TH SUZ-KA50VAR2.TH. Symptom LED indication Abnormal point/ Condition Outdoor unit -time flash every Outdoor power system does not operate. 2.5 seconds 6-time flash 2.5 seconds OFF -time fl ash 2.5 seconds OFF 4-time flash 2.5 seconds OFF 'Outdoor unit 2-time flash stops and 2.5 seconds OFF restarts 3 minutes later' is repeated. Outdoor unit operates. Outdoor unit operates. 3-time ash 2.5 seconds OFF Outdoor thermistors Outdoor control system Serial signal Stop valve/ Closed valve Outdoor unit (Other abnormality) Overcurrent protection Discharge temperature overheat protection Condition Overcurrent protection stop is continuously performed 3 times within minute after the compressor gets started, or failure of restart of compressor has repeated times. Discharge temperature thermistor, fin temperature thermistor, defrost thermistor, P.C. board temperature thermistor or ambient temperature thermistor shorts or opens during compressor running. Correspondence Reconnect connector of compressor. Refer to 2-5. a "How to check inverter/compressor". Check stop valve. Refer to 2-5. g "Check of outdoor thermistors". nvolatile memory data cannot be read properly. Replace inverter P.C. board. (The left lamp of OPERATION INDICATOR lamp of the indoor unit lights up or fl ashes 7-time.) The communication fails between the indoor and outdoor unit Refer to 2-5. p "How to check misfor 3 minutes. wiring and serial signal error. Closed valve is detected by compressor current. Check stop valve. Outdoor unit is defective. Large current fl ows into intelligent power module, or compressor repeats after 5 seconds when overcurrent protection occurs within 0 seconds after compressor starts. (Repeated times at Maximum) Temperature of discharge temperature thermistor exceeds 6 C, compressor stops. Compressor can restart if discharge temperature thermistor reads 00 C or less 3 minutes later. Refer to "Flow chart of the detailed outdoor unit failure mode recall function". Reconnect connector of compressor. Refer to 2-5. a "How to check inverter/compressor". Check stop valve. Check refrigerant circuit and refrigerant amount. Refer to 2-5. k "Check of LEV". 4-time flash Fin temperature/p.c. Temperature of fin temperature thermistor on the heat sink Check around outdoor unit. 2.5 seconds OFF board temperature exceeds 75 to 80 C or temperature of P.C. board temperature Check outdoor unit air passage. thermistor overheat thermistor on the inverter P.C.board exceeds 70 to 75 C. Refer to 2-5. i "Check of outdoor protection fan motor". 5-time flash High pressure protection Indoor coil thermistor exceeds 70 C in HEAT mode. Defrost Check refrigerant circuit and refrig- 2.5 seconds OFF thermistor exceeds 70 C in COOL mode. erant amount. Check stop valve. 8-time flash Compressor synchronous The waveform of compressor current is distorted. Reconnect connector of compres- abnormality 2.5 seconds OFF sor. Refer to 2-5. a "How to check inverter/compressor". 0-time flash Outdoor fan motor Outdoor fan has stopped 3 times in a row within seconds Refer to 2-5. i "Check of outdoor 2.5 seconds OFF after outdoor fan start-up. fan motor. Refer to 2-5. n "Check of inverter P.C. board. 2-time flash Each phase current Each phase current of compressor cannot be detected normally Refer to 2-5. a "How to check in- 2.5 seconds OFF of compressor verter/compressor". 3-time flash DC voltage DC voltage of inverter cannot be detected normally. Refer to 2-5. a "How to check in- 2.5 seconds OFF verter/compressor". -time flash Frequency drop by Current from power outlet reaches the protection current, and The unit is normal, but check the 2.5 seconds OFF current protection compressor frequency lowers. following. 3-time flash Frequency drop by Temperature of indoor coil thermistor exceeds 55 C in HEAT Check if indoor fi lters are clogged. 2.5 seconds OFF high pressure protection mode, compressor frequency lowers. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled. Frequency drop by Indoor coil thermistor reads 8 C or less in COOL mode, compressor defrosting in COOL frequency lowers. mode 4-time flash 2.5 seconds OFF 7-time flash 2.5 seconds OFF Frequency drop by discharge temperature protection Low discharge temperature protection Temperature of discharge temperature thermistor exceeds Check refrigerant circuit and refrigerant amount. C, compressor frequency lowers. Refer to 2-5. k "Check of LEV". Refer to 2-5. g "Check of outdoor thermistors". Temperature of discharge temperature thermistor has been Refer to 2-5. k "Check of LEV". 50 C or less for minutes. Check refrigerant circuit and refrigerant amount. 9 8-time flash 2.5 seconds OFF 9-time flash 2.5 seconds OFF PAM protection PAM: Pulse Amplitude Modulation Inverter check mode The overcurrent fl ows into IBT (Insulated ate Bipolar transistor : TR82) or when the bus-bar voltage reaches 3 V or more, PAM stops and restarts. The connector of compressor is disconnected, inverter check mode starts. NOTE:. The location of LED is illustrated at the right fi gure. Refer to or Inverter P.C. board. 2. LED is lighted during normal operation. The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF. (Example) When the fl ashing frequency is second ON 0.5-second ON This is not malfunction. PAM protection will be activated in the following cases; Instantaneous power voltage drop (Short time power failure) 2 When the power supply voltage is high. Check if the connector of the compressor is correctly connected. Refer to 2-5. a "How to check inverter/ compressor". Inverter P.C. board(parts side) LED Flashing ON OFF 2.5-second OFF 2.5-second OFF OC3J 68

69 2-4. Trouble criterion of main parts () SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAR.TH SUZ-KA35VAR.TH SUZ-KA25VAH.TH SUZ-KA35VAH.TH SUZ-KA25VAHR.TH SUZ-KA35VAHR.TH Part name Defrost thermistor (RT6) Check method and criterion Figure Fin temperature thermistor (RT64) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor(rt68) (SUZ-KA25/35VA(H)R.TH) Measure the resistance with a tester. Refer to 2-6. Test point diagram and voltage, or Inverter P.C. board, for the chart of thermistor. Discharge temperature thermistor (RT62) Compressor Outdoor fan motor R.V. coil Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up. Refer to 2-6. Test point diagram and voltage, or Inverter P.C. board, for the chart of thermistor. Measure the resistance between the terminals with a tester. (Part temperature: to 40 C) rmal U-V U-W V-W SUZ-KA25VA(H).TH SUZ-KA35VA(H).TH SUZ-KA25VA(H)R.TH SUZ-KA35VA(H)R.TH. to.66 " 0.4 to 0.53 ".36 to.93 " Measure the resistance between the terminals with a tester. (Part temperature: to 40 C) Color of the lead wire rmal SUZ-KA25/35VA(H).TH SUZ-KA25/35VA(H)R.TH WHT - BLK BLK - RED RED - WHT 3 to 4 " to 42 " Measure the resistance between the terminals with a tester. (Part temperaure: to 40 C) rmal SUZ-KA25/35VA(H).TH SUZ-KA25/35VA(H)R.TH. to.55 k".9 to.78 k".52 to 2.7 " WHT RED BLK 2 3 W V U WHT RED BLK 2 3 W V U Expansion valve coil (LEV) Measure the resistance with a tester. (Part temperature: to 40 C) Color of the lead wire WHT - RED RED - ORN YLW - BRN BRN - BLU rmal 37 to 54 " WHT6 RED ORN4 LEV YLW5 BRN2 BLU3 Defrost heater SUZ-KA VAH Measure the resistance with a tester. (Part temperature: to 40 C) rmal 333 to 4 " OC3J 69

70 2-4. Trouble criterion of main parts (2) SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA50VAR2.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA60VAR2.TH SUZ-KA7VA.TH SUZ-KA7VA.TH Part name Check method and criterion Figure Defrost thermistor (RT6) Fin temperature thermistor (RT64) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) Measure the resistance with a tester. Refer to 2-6. Test point diagram and voltage, Outdoor electronic control P.C. board or Inverter P.C. board, for the chart of thermistor. Discharge temperature thermistor (RT62) Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up. Refer to 2-6. Test point diagram and voltage, Outdoor electronic control P.C. board or Inverter P.C. board, for the chart of thermistor. Compressor Measure the resistance between the terminals with a tester. (Part temperature: 0 to 40 C) rmal SUZ-KA50/60VA().TH SUZ-KA50/60VAR2.TH 0.40 to 0.49 " 0.86 to.06 " SUZ-KA7VA().TH. to.49 " V WHT W RED U BLK Measure the resistance between lead wires with a tester. (Part temperature: 0 to 40 C) RED U (W) Outdoor fan motor Color of the lead wire RED - BLK BLK - WHT WHT - RED rmal 3.4 to 6.4 " WHT V (V) BLK W (U) Measure the resistance with a tester. (Part temperature: 0 to 40 C) R.V. coil SUZ-KA50/60VAR2.TH. to.62 k" rmal Other models 2.6 to 3.3 k" Expansion valve coil (LEV) Measure the resistance with a tester. (Part temperature: 0 to 40 C) Color of the lead wire rmal WHT - RED RED - ORN 37.4 to 53.9 " YLW - BRN BRN - BLU WHT RED ORN LEV YLW BRN BLU High pressure switch (HPS) SUZ-KA60VAR2.TH SUZ-KA7VA().TH Pressure 3.7 ± 0.5 MPa MPa - 0. Close Open OC3J 70

71 2-5. Troubleshooting flow Outdoor unit does not operate. [SUZ-KA25/35VA(H).TH] A How to check inverter/compressor Disconnect the connector (CN6) between compressor and the intelligent power module (IPM). Check the voltage between terminals. See B Check of open phase. Are the voltages balanced? Check the resistance of the intelligent power module. See C 'Check of intelligent power module'. Check the compressor. See D Check of compressor. Is the resistance infinite? (0 several ") Replace the inverter P.C. board. B Check of open phase Replace the inverter P.C. board and compressor. With the connector between compressor and the intelligent power module disconnected, activate the inverter and check if the inverter is normal by measuring the balance of voltage between terminals. Output voltage [V] 5V << Operation method>> Start cooling or heating operation by pressing the EMERENCY OPERATION switch on the indoor unit. (test-run mode : refer to page 3 for SLZ/SUZ and 37 for SEZ/SUZ.) <<Measurement point>> Measure AC voltage between the lead wires at 3 points. BLK (U)-WHT (V) BLK (U)-RED (W) WHT(V)-RED (W) tes. Output voltage varies according to power supply voltage. 2. Measure the voltage by analog type tester. 3. During this check, LED of inverter P.C. board flashes 9 times. 9-time flash Inverter P.C. board Flashing LED 2.5-second OFF C Check of intelligent power module Measure the resistance between terminals on the intelligent power module. <<Measurement point>> at 6 points BLK-WHT, WHT-BLK BLK-RED, RED-BLK WHT-RED, RED-WHT ohmmeter indication " X rmal (infinite) <<Judgement>> Infinite ["] rmal 0 dozens of Abnormal (short) " X Abnormal (0 dozens of ") OC3J 7

72 [SUZ-KA25/35VA(H).TH] D Check of compressor E "Check of compressor winding". Is the compressor normal? Replace the compressor. F "Check of compressor operation time". Does the compressor operate continuously? Is the compressor operation time more than 0 seconds? Replace the compressor. OK Check the refrigerant circuit. E Check of compressor winding Disconnect the connector (CN6) between compressor and intelligent power module, and measure the resistance between the compressor terminals. Measurement point at 3 points of lead wire. BLK-WHT BLK-RED WHT-RED <<Judgment>> Refer to 2-4.Trouble criterion of main parts. 0["] Abnormal [short] Infinite["] Abnormal [open] tes. Be sure to zero the ohmmeter before measurement. 2. Winding resistance for each phase at :. Refer to 4. SPECIFICATION. Ohmmeter indication " " " X X X rmal ( several ") Abnormal (0" short) Abnormal (infinite open) WHT 2 3 W V RED BLK U Compressor motor F Check of compressor operation time 0 second Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to over current. <<Operation method>> [For wireless remote controller use model] Start heating or cooling operation by pressing the EMERENCY OPERATION switch on the indoor unit. (Test-run mode) [For wired remote controller use model] Start heating or cooling operation by pressing the TEST button 0 seconds twice on the remote controller. (Test-run mode) <<Measurement>> Measure the time from the start of outdoor fan running to the stop of compressor due to over current. <<Judgment>> For reference 5 minutes 0 to0 seconds Abnormal (compressor short or poor contact) (compressor lock-out) 0 seconds to 5 minutes Abnormal (refrigerant circuit defect) more than 5 minutes rmal Outdoor fan starts Abnormal (Compressor winding short or layer short) (compressor connector poor contact) (compressor lock-out) Abnormal (Refrigerant circuit defect, etc.) rmal OC3J 72

73 The thermistors in the outdoor unit are abnormal. [SUZ-KA25/35VA(H).TH] Check of outdoor thermistors Defrost thermistor RT6 Measure the resistance between CN64 and 2. Disconnect the connectors CN64, CN642 and CN643 from the inverter P.C. board. (Check the characteristics of each thermistor.) Discharge temperature thermistor RT62 Measure the resistance between CN64 3 and 4. Fin temperature thermistor RT64 Measure the resistance between CN642 and 2. Ambient temperature thermistor RT65 Measure the resistance between CN643 and 2. Is the resistance of thermistor normal? (Refer to 2-6-.) Replace the thermistor except RT64. In case that RT64 is abnormal, replace the inverter P.C. board, since RT64 is combined with the inverter P.C. board. Reconnect the connectors CN64, CN642 and CN643. Turn ON the power supply and press EMERENCY OPERATION switch (For wireless remote controller use model)./test button twice (For wired remote controller use model). Replace the inverter P.C. board. Does the unit operate 0 minutes or more? OK (Cause is poor contact.) H Check of R.V. coil First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 2-4.Trouble criterion of main parts. In case CN72 is not connected or R.V. coil is open, voltage is generated between the terminal pins of the connector although no signal is being transmitted to R.V. coil. Check if CN72 is connected. Unit operates COOL mode even if it is set to HEAT mode. Disconnect connector (CN6) between compressor and intelligent power module. [For wireless remote controller use model] Turn ON the power supply and press the EMERENCY OPERATION switch (HEAT switch). [For wired remote controller use model] Turn ON the power supply and press the TEST button twice (HEAT mode). Is there 2V AC between CN72 and 2 on the power P.C. board 3 minutes after the power supply is turned ON? Replace the 4-way valve. Replace the power P.C. board. CN72 Power P.C. board (soldered side) Unit operates HEAT mode even if it is set to COOL mode. Disconnect connector (CN6) between compressor and intelligent power module. [For wireless remote controller use model] Turn ON the power supply and press the EMERENCY OPERATION switch (COOL switch). [For wired remote controller use model] Turn ON the power supply and press the TEST button twice (COOL mode). Is there 2 V AC between CN72 and 2 on the power P.C.board 3 minutes after the power supply is turned ON? Defective R.V. coil Defective 4-way valve Replace the power P.C. board. OC3J 73

74 Outdoor fan motor does not operate. I Check of outdoor fan motor [SUZ-KA25/35VA(H).TH] Is the resistance between each terminal of outdoor fan motor normal? (Refer to 2-4.) Disconnect CN9 from the inverter P.C. board. Inverter P.C. board (Solder side) Turn ON the power supply. Rotate the outdoor fan slowly by hand, and measure the voltage of CN93 (Measurement of feedback output). Between (+) and 5( ) Between 2(+) and 5( ) Between 3(+) and 5( ) CN93 CN9 ( Fixed to either 5 or 0 V DC) Does the voltage between each terminal repeat 5 and 0 V DC by turns? Does the outdoor fan rotate smoothly? Replace the outdoor fan motor. Check the inverter P.C. board. (Refer to 2-5.N) Inverter does not operate. J Check of power supply Disconnect the connector (CN6) between compressor and intelligent power module. [For wireless remote controller use model] Turn ON power supply and press EMERENCY OPERATION switch. [For wired remote controller use model] Turn ON the power supply and press the TEST button twice. Rectify indoor/outdoor connecting wire. Indoor/outdoor connecting wire Outdoor terminal block S3 S2 S Does POWER lamp on the indoor unit light up? Is there voltage 2 V AC between the indoor terminal block S and S2? Replace the indoor electronic control P.C. board. Is there voltage 0 to 370 V DC between DB6 (+) and DB6 ( ) on the inverter P.C. board? Refer to Check the electric parts in main circuit. Dose LED on the inverter P.C. board light up or flash? Refer to OK If flash, refer to 2-3. Replace the inverter P.C. board. DB6 0 to 370 V DC Inverter P.C. board (Solder side) OC3J 74

75 Outdoor unit does not operate at all or stops immediately due to over current. K Check of current limiting resistor [SUZ-KA25/35VA(H).TH] When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly. Does the current-limiting resistor (R64A or R64B) on the power P.C. board short out? (rmal resistance : 5 ', 5% ) Turn ON the power supply and press EMERENCY OPERATION switch of the indoor unit. Does LED on the inverter P.C. board light up? Replace the power P.C. board or the inverter P.C. board. Replace the power P.C. board. Does the rush current limiting relay (X64) work properly? (rmally it close minutes after outdoor unit power ON.) Replace the power P.C. board or the compressor. Replace the power P.C.board. Check other electric parts in the main circuit together in the case of the defective current-limiting resistor. Heating/Cooling does not work sufficiently. L Check of LEV (Expansion valve) (For wireless remote controller use model) Turn ON the power supply. <Preparation of the remote controller> While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time, press RESET button. 2 First, release RESET button. And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds. ON/OFF AUTO COOL HEAT TOO WARM DRY MODE FAN VANE TOO COOL SELECT TIME RESET Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. * Expansion valve operates in full-opening direction. h Do you hear the expansion valve "click, click "? Do you feel the expansion valve vibrate on touching it? Is LEV properly fixed to the expansion valve? Does the resistance of LEV have the characteristics? (Refer to 2-4.) Replace the LEV. OK Properly fix the LEV to the expansion valve. ON/OFF TOO WARM Measure each voltage between connector pins of CN7 on the inverter P.C. board..pin3( ) Pin(+) 2.Pin4( ) Pin(+) 3.Pin5( ) Pin(+) 4.Pin6( ) Pin(+) Is there about 3 to 5 V AC between each? NOTE: Measure the voltage by an analog tester. TOO COOL *. Regardless of normal or abnormal, a short beep is emitted once as the signal is received. NOTE : After check of LEV, do the undermentioned operations.. Turn OFF the power supply and turn ON again. 2. Press the RESET button on the remote controller. Replace the inverter P.C. board. Replace the expansion valve. OC3J 75

76 L Check of LEV (Expansion valve) (For wired remote controller use model) [SUZ-KA25/35VA(H).TH] Start Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely. Is "click - click" sound heard? Or, do you feel vibration of the LEV coil with a hand? rmal Disconnect the connector CN7 is there normal resistance to LEV coil? Replace the LEV coil. Replace the inverter P.C. board. Outdoor base gets frozen. M Check of defrost heater <SUZ-KA25VAH SUZ-KA35VAH> Check the following points before checking electric continuity. ) Does the resistance of ambient temperature thermistor have the characteristics? Refer to Inverter P.C. board. 2) Is the resistance of defrost heater normal? Refer to 2-4. Trouble criterion of main parts. 3) Does the heater protector remain conducted (not open)? 4) Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors? In HEAT mode, for more than 5 minutes, let the ambient temperature thermistor continue to read 5: or less, and let the defrost thermistor continue to read : or less. NOTE: In case both thermistors are more than the above temperature, cool them with cold water, etc. Is there 2 V AC between CN7 and 3 on the power P.C. board? Refer to Power P.C. board. problem of the power P.C. board. Is the voltage between CN7 2(+) 3( ) on the power P.C. board 0 V DC? Refer to Power P.C. board. Replace the inverter P.C. board. Replace the power P.C. board. 2 3 CN7 3 2 CN7 2 H H 2 2 V AC OC3J 76

77 [SUZ-KA25/35VA(H).TH] Outdoor fan motor does not operate, or stops immediately after starting up. N Check of inverter P.C. board Check the outdoor fan motor. Refer to2-5.i. Is the fuse (F90) blown on the inverter P.C. board? Check the connection of the connectors (CN93, CN9) of outdoor fan motor. If the connection is poor, make it correct. Inverter P.C.board (Solder side) CN93 CN9 Operate the outdoor unit by starting EMERENCY OPERATION. Check the LED indication on the inverter P.C. board. Does the LED blink 0-time? (0-time blink) Check the corresponding parts following LED indication. (Refer to 2-3.Troubleshooting check table.) Replace the inverter P.C. board. OC3J 77

78 [SUZ-KA25/35VA(H).TH] O How to check miswiring and serial signal error (when outdoor unit does not work) (For wireless remote controller use model) Turn OFF the power supply. Is there rated voltage in the power supply? Turn ON the power supply. Check the power supply. Is there rated voltage between outdoor terminal block S and S2? Check the wiring. Press EMERENCY OPERATION switch once. Does the lamp of OPERATION INDICATOR lamp light up? <Confirmation of the power to the indoor unit> Is serial signal error indicated 6 minutes later? Is there any miswiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Make them correct. A As for indoor unit. B Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not mis-wiring. Short-circuit outdoor terminal block is S2 and S3. * Turn ON the power supply. *. Miswiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. *3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C.board or the outdoor electronic control P.C.board is normal, LED blinks 6 times after 3 minutes. Inverter P.C.board (Parts side) LED Blinking A Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON it again. Press EMERENCY OPERATION switch. Is serial signal error indicated 6 minutes later? B Reinstall the unit apart from inverter-contro lled lighting equipment. Attach a filter on receiving section of the indoor unit. Does the LED on the inverter P.C. board or the outdoor electronic control P.C.board repeat "3.6-second-OFF and 0.8-secondquick blinking"? *3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S2? <Confirmation of power voltage> Be sure to release the failure-mode recall function after checking. Replace the indoor electronic control P.C. board. (Lighted or not lighted) Replace the inverter P.C. board or the outdoor electronic control P.C.board. *2 *2 Be careful of the residual voltage of smoothing capacitor. Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Replace the indoor/outdoor connecting wire. Replace the indoor/outdoor connecting wire. OC3J 78

79 [SUZ-KA25/35VA(H).TH] O How to check miswiring and serial signal error (when outdoor unit does not work) (For wired remote controller use model) Turn OFF the power supply. Is there rated voltage in the power supply? Turn ON the power supply. Check the power supply. Is there rated voltage between outdoor terminal block S and S2? Press TEST button twice. Check the wiring. Does POWER lamp on remote controller light up? <Confirmation of the power to the indoor unit> Is the self-check of the remote controller displayed 6 minutes after? Serial signal error display Is there any mis wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Make them sure. POWER lamp blinks. A As for indoor unit. B Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not mis-wiring. Short-circuit outdoor terminal block is S2 and S3. * Turn ON the power supply. *. Miswiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. *3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C.board or the outdoor electronic control P.C.board is normal, LED blinks 6 times after 3 minutes. Inverter P.C.board (Parts side) A Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON it again. Press TEST button twice. Is serial signal error indicated 6 minutes later? B LED Blinking Reinstall the unit apart from inverter-contro lled lighting equipment. Attach a filter on receiving section of the indoor unit. Does the LED on the inverter P.C. board or the outdoor electronic control P.C.board repeat "3.6-second-OFF and 0.8-secondquick blinking"? *3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S2? <Confirmation of power voltage> Be sure to release the failure-mode recall function after checking. Replace the indoor electronic control P.C. board. (Lighted or not lighted) Replace the inverter P.C. board or the outdoor electronic control P.C.board. *2 *2 Be careful of the residual voltage of smoothing capacitor. Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Replace the indoor/outdoor connecting wire. Replace the indoor/outdoor connecting wire. OC3J 79

80 [SUZ-KA25/35VA(H).TH SUZ-KA50/60/7VA().TH SUZ-KA60VAR2.TH] P Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3 m? Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit. Is the distance between the TV sets or radios and the indoor unit within m, or is the distance between the TV sets or radios and the outdoor unit within 3 m? Extend the distance between the TV sets and/or radios and the indoor unit, or the TV sets or radios and the outdoor unit. Are the antennas damaged? Is the coaxial cable damaged? Is there any poor contact in the antenna wiring? Replace or repair the antenna. Replace or repair the coaxial cable. Is the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas close? Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas. Even if all of the above conditions are fulfilled, the electromagnetic noise may enter, depending on the electric field strength or the installation condition (combination of specific conditions such as antennas or wiring). Check the following before asking for service..devices affected by the electromagnetic noise TV sets, radios (FM/AM broadcast, shortwave) 2.Channel, frequency, broadcast station affected by the electromagnetic noise 3.Channel, frequency, broadcast station unaffected by the electromagnetic noise 4.Layout of ; indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, grounding wire, antennas, wiring from antennas, receiver 5.Electric field intensity of the broadcast station affected by the electromagnetic noise 6.Presence or absence of amplifier such as booster 7.Operation condition of air conditioner when the electromagnetic noise enters in. )Turn OFF the power supply once, and then turn ON the power supply. In this situation check for the electromagnetic noise. 2)Within 3 minutes after turning ON the power supply, press OPERATE/STOP (ON/OFF) button on the remote controller for power ON, and check for the electromagnetic noise. 3)After a short time (3 minutes later after turning ON), the outdoor unit starts running. During operation, check for the electromagnetic noise. 4)Press OPERATE/STOP (ON/OFF) button on the remote controller for power OFF, when the outdoor unit stops but the indoor/outdoor communication still runs on. In this situation check for the electromagnetic noise. After checking the above, consult the service representative. OC3J 80

81 Outdoor unit does not operate. (LED display: display OFF) [SUZ-KA50/60/7VA().TH SUZ-KA60VAR2.TH] Q Check of power supply Start Check the connecting of parts of main power supply circuit. Turn on power supply. Is there voltage of 2 V AC in the power supply terminal block? Check the power supply cable. Is the output voltage from the noise filter P.C. board 2 V AC? Is fuse (F64) blown? Replace the noise filter P.C. board. Replace the fuse. Is the input voltage to the power board 2 V AC? Replace the reactor. Is the input voltage to the outdoor electronic control P.C. board 5 V DC? Replace the power board. Replace the outdoor electronic control P.C. board. OC3J 8

82 [SUZ-KA50/60/7VA().TH SUZ-KA60VAR2.TH] When unit cannot operate neither by the remote controller nor by EMERENCY OPERATION switch. Indoor unit does not operate. Outdoor unit does not operate. R How to check miswiring and serial signal error (when outdoor unit does not work) (For wireless remote controller use model) As for indoor unit. Turn OFF the power supply. Is there rated voltage in the power supply? Turn ON the power supply. Check the power supply. Is there rated voltage between outdoor terminal block S and S2? Check the wiring. Press EMERENCY OPERATION switch once. Does the lamp of OPERATION INDICATOR lamp light up? <Confirmation of the power to the indoor unit> Is serial signal error indicated 6 minutes later? Is there any miswiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Make them correct. A Outdoor electronic control P.C. board (Parts side) LED2 LED Blinking B Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not mis-wiring. Short-circuit outdoor terminal block is S2 and S3. * Turn ON the power supply. *. Miswiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. *3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C.board or the outdoor electronic control P.C.board is normal, LED blinks 6 times after 3 minutes. A Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON it again. Press EMERENCY OPERATION switch. Is serial signal error indicated 6 minutes later? B OC3J Reinstall the unit apart from inverter-contro lled lighting equipment. Attach a filter on receiving section of the indoor unit. Does the LED on the inverter P.C. board or the outdoor electronic control P.C.board repeat "3.6-second-OFF and 0.8-secondquick blinking"? *3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S2? <Confirmation of power voltage> Be sure to release the failure-mode recall function after checking. 82 Replace the indoor electronic control P.C. board. (Lighted or not lighted) Replace the inverter P.C. board or the outdoor electronic control P.C.board. *2 *2 Be careful of the residual voltage of smoothing capacitor. Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Replace the indoor/outdoor connecting wire. Replace the indoor/outdoor connecting wire.

83 When unit cannot operate neither by the remote controller. Indoor unit does not operate. Outdoor unit does not operate. R [SUZ-KA50/60/7VA().TH SUZ-KA60VAR2.TH] How to check miswiring and serial signal error (when outdoor unit does not work) (For wired remote controller use model) As for indoor unit. Turn OFF the power supply. Is there rated voltage in the power supply? Turn ON the power supply. Check the power supply. Is there rated voltage between outdoor terminal block S and S2? Press TEST button twice. Check the wiring. Does the left lamp of OPERATION INDICATOR lamp on remote controller light up? <Confirmation of the power to the indoor unit> Serial signal error display The left lamp of OPERATION INDICATOR lamp blinks. Is the self-check of the remote controller displayed 6 minutes after? Is there any mis wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Make them sure. A Outdoor electronic control P.C. board (Parts side) LED2 LED Blinking B Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not mis-wiring. Short-circuit outdoor terminal block is S2 and S3. * Turn ON the power supply. *. Mis-wiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. *3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C.board or the outdoor electronic control P.C.board is normal, LED blinks 6 times after 3 minutes. A Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON it again. Press TEST button twice. Is serial signal error indicated 6 minutes later? B OC3J Reinstall the unit apart from inverter-contro lled lighting equipment. Attach a filter on receiving section of the indoor unit. Does the LED on the inverter P.C. board or the outdoor electronic control P.C.board repeat "3.6-second-OFF and 0.8-secondquick blinking"? *3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S2? <Confirmation of power voltage> Be sure to release the failure-mode recall function after checking. 83 Replace the indoor electronic control P.C. board. (Lighted or OFF) Replace the inverter P.C. board or the outdoor electronic control P.C.board. *2 *2 Be careful of the residual voltage of smoothing capacitor. Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Replace the indoor/outdoor connecting wire. Replace the indoor/outdoor connecting wire.

84 [SUZ-KA50/60/7VA().TH SUZ-KA60VAR2.TH] The cooling operation or heating operation does not operate. (LED display: Both LED and LED2 lighting) S Check of R.V. coil When heating operation does not work.. Disconnect the lead wire leading to the compressor minutes after turning on the power supply, start EMERENCY OPERATION in HEAT mode. Is there voltage of 2 V AC between pin and pin 2 at connector CN92?* Turn off power supply of indoor and outdoor unit.. Turn off power supply of indoor and outdoor unit, and disconnect the connector CN78 in the outdoor electronic control P.C. board minutes after turning on the power supply, start EMERENCY OPERATION in HEAT mode. Disconnect the connector CN92 in noise filter P. C. board. Is there normal resistance to R.V. coil? Replace the 4-way valve. Replace the R.V. coil. Is there voltage 2 V DC between the connector CN78 pin 5 (+) and pin 3 ( )? Replace the noise filter P.C. board. Replace the electronic control P.C. board. When cooling operation does not work.. Disconnect the lead wire leading to the compressor minutes after turning on the power supply, start EMERENCY OPERATION in COOL mode. * If the connector CN92 is not connected or R.V. coil is open, voltage occurs between terminals even when the control is OFF. Is there voltage of 2V AC between pin and pin 2 at connector CN92?* Replace the 4-way valve.. Turn off power supply of indoor and outdoor unit, and disconnect the connector CN78 in the outdoor electronic control P.C. board minutes after turning on the power supply, start EMERENCY OPERATION in COOL mode. Is there voltage 2 V DC between the connector CN78 pin 5 (+) and pin 3 ( )? Replace the noise filter P.C. board. Replace the outdoor electronic control P.C. board. OC3J 84

85 [SUZ-KA50/60/7VA().TH SUZ-KA60VAR2.TH] When cooling, heat exchanger of non-operating indoor unit frosts. When heating, non-operating indoor unit get warm. T Check of LEV LED display: LED LED2 Lighting Lighting 6 time oes out Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely. Is "click - click" sound heard? Or, do you feel vibration of the LEV coil with a hand? Disconnect the connector CN795. Is there normal resistance to LEV coil? Replace the LEV coil. rmal Replace the outdoor electronic control P.C. board. When heating, room does not get warm. When cooling, room does not get cool. U How to check inverter/ compressor LED display: LED LED2 Lighting Lighting Lighting Twice Twice oes out Disconnect the terminal of the compressor. 3 minutes after turning on the power supply, start EMERENCY OPERATION. Measure the voltage between each lead wire leading to the compressor. U (BLK) V (WHT) V (WHT) W (RED) W (RED) U (BLK) Is voltage output on right table? Is output balanced? tes: After the outdoor fan starts running, wait for minutes or more before measuring the voltage. The output voltage values have the tolerance of i%. COOL 50 V (48 Hz) HEAT 70 V (64 Hz) Is the input voltage to the outdoor electronic control P.C. board 370 V or more? Replace the power board. Turn off power supply of indoor and outdoor unit, and measure the compressor winding resistance between the compressor terminals. Is the resistance between each terminal normal? Reconnect the lead wire of compressor, and turn on power supply to indoor and outdoor unit. 3 minutes later, starts EMERENCY OPERATION. Replace the compressor. Clarify the causes by counting time until the inverter stops. 0 to 0 seconds: compressor rare short 0 to 60 seconds: compressor lock 60 seconds to 5minutes: refrigerant circuit defective 5 minutes or more: normal OC3J 85

86 When thermistor is abnormal. [SUZ-KA50/60/7VA().TH SUZ-KA60VAR2.TH] V Check of outdoor thermistors Disconnect the connector in the outdoor electronic control P.C. board or the outdoor power board (see below table), and measure the resistance of thermistor. Is the thermistor normal? Replace the thermistor. Reconnect the connector CN66 on the outdoor electronic control P.C. board and CN3 on the power board, and disconnect the lead wire leading to the compressor. 3 minutes after turning on the power supply, start (EMERENCY) OPERATION. Does thermistor operate 0 minutes or more though the thermistor abnormality is not displayed? rmal Replace the outdoor electronic control P.C. board. Thermistor Defrost thermistor Discharge temperature thermistor Outdoor heat exchanger temperature thermistor Fin temperature thermistor Ambient temperature thermistor Symbol RT6 RT62 RT68 RT64 RT65 Connector, Pin. Between CN66 pin and pin2 on the outdoor electronic control P.C. board Between CN66 pin3 and pin4 on the outdoor electronic control P.C. board Between CN66 pin7 and pin8 on the outdoor electronic control P.C. board Between CN3 pin and pin2 on the outdoor power board Between CN663 pin and pin2 on the outdoor electronic control P.C. board Fan motor does not operate or stops operating shortly after starting the operation. W Check of outdoor fan motor Start Check the connection between the connector CN93 and CN9. Is the resistance between each terminal of outdoor fan motor normal? Disconnect CN9 from outdoor electronic control P.C. board, and turn on the power supply. Rotate the outdoor fan motor manually and measure the voltage of CN93. Between (+) and 5( ) Between 2(+) and 5( ) Between 3(+) and 5( ) (Fixed to either 5 or 0 V DC) Replace the outdoor DC fan motor. Does the voltage between each terminal become 5 and 0 V DC repeatedly? Does the outdoor fan motor rotates smoothly? Replace the outdoor electronic control P.C. board. OC3J 86

87 [SUZ-KA50/60/7VA().TH SUZ-KA60VAR2.TH] When the operation frequency does not go up from lowest frequency. X Check of HPS SUZ-KA60VAR2.TH SUZ-KA7VA().TH. Disconnect the connector CN68 in the electronic control P.C. board. 2. Check the resistance of HPS after minutes have passed since the outdoor unit power supply was turned off. Check the resistance between each terminal. 0" Infinity Replace HPS. Reconnect CN68. Turn on power supply to the indoor and outdoor unit. 3 minutes later, starts EMERENCY OPERATION. Is HPS protection displayed immediately after compressor starts? rmal Replace the electronic control P.C. board. Outdoor unit does not operate at all, or stops immediately due to overcurrent. Y Check of current-limiting resistor When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly. Is the resistance of current-limiting resistor (R64A or R64B) on the noise filter P.C. board normal? (rmal resistance : 5' i5%) t open Turn ON the power supply and press EMERENCY OPERATION switch. Does LED on the outdoor electronic control P.C. board light up? Replace the noise filter P.C. board or the outdoor electronic control P.C. board. Open Replace the power P.C. board. Does the rush current limiting relay(x64) work properly? Replace the outdoor electronic control P.C. board or power P.C.board or the compressor. Replace the noise filter P.C.board. OC3J 87

88 a How to check inverter/compressor [SUZ-KA25/35VA(H)R.TH SUZ-KA50VAR2.TH] Disconnect the connector (CN6) between compressor and the intelligent power module (IPM). Check the voltage between terminals. See b Check of open phase. Are the voltages balanced? Check the compressor. Replace the inverter P.C. board. See d Check of compressor. b Check of open phase With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if the inverter is normal by measuring the balance of voltage between the terminals. The output voltage values have the tolerance of ± %. << Operation method>> Start cooling or heating operation by pressing EMERENCY OPERATION switch on the indoor unit. (TEST RUN OPERATION : Refer to page 3 for SLZ/SUZ and page 37 for SEZ/SUZ.) <<Measurement point>> At 3 points BLK (U) WHT (V) 9-time flash BLK (U) RED (W) WHT (V) RED (W) 2.5-second OFF NOTE:. Output voltage varies according to power supply voltage. 2. Measure the voltage by analog type tester. 3. During this check, LED of the inverter P.C. board flashes 9 times. (Refer to " (KA25/35VA) or Inverter P.C. Board.") d Check of compressor Refer to e Check of compressor winding. Is the compressor normal? Replace the compressor. Refer to f Check of compressor operation time. Does the compressor operate continuously? Is the compressor operation time more than 0 seconds? Replace the compressor. OK Check the refrigerant circuit. OC3J 88

89 e Check of compressor winding [SUZ-KA25/35VA(H)R.TH SUZ-KA50VAR2.TH] Disconnect the connector (CN6) between the compressor and intelligent power module, and measure the resistance between the compressor terminals. <<Measurement point>> at 3 points BLK WHT BLK RED Measure the resistance between the lead wires at 3 points. WHT RED <<Judgement>> Refer to "2-4.Trouble criterion of main parts". 0 [Ω] Abnormal [short] Infinite [Ω] Abnormal [open] NOTE: Be sure to zero the ohmmeter before measurement. f Check of compressor operation time Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to over current. <<Operation method>> Start heating or cooling operation by pressing EMERENCY OPERATION switch on the indoor unit. (TEST RUN OPERATION : Refer to page 3 for SLZ/SUZ and page 37 SEZ/SUZ.) <<Measurement>> Measure the time from the start of compressor to the stop of compressor due to overcurrent. <<Judgement>> 0 second second 2 seconds 0 seconds 0 minutes Compressor starts Abnormal (IPM failure) (Compressor winding short) Abnormal (Compressor lock out) (Starting defect) Abnormal (Poor contact,) (Outdoor P.C. board defect) (Disconnected connector) Abnormal (Refrigerant circuit defect) (Closed valve) rmal g Check of outdoor thermistors Disconnect the connector of thermistor in the outdoor P.C. board (see below table), and measure the resistance of thermistor. Is the thermistor normal? (Refer to " or Inverter P.C. board". ) Reconnect the connector of thermistor. Turn ON the power supply and press EMERENCY OPERATION switch. Replace the thermistor except RT64. When RT64 is abnormal, replace the inverter P.C. board or the outdoor power board. Does the unit operate for 0 minutes or more without showing thermistor abnormality? OK (Cause is poor contact.) Replace the inverter P.C. board or the outdoor power board. Thermistor Symbol Connector, Pin. Board Defrost RT6 Between CN64 pin and pin2 Discharge temperature RT62 Between CN64 pin3 and pin4 Fin temperature RT64 Between CN642 pin and pin2 Inverter P.C. board Ambient temperature RT65 Between CN643 pin and pin2 Outdoor heat exchanger temperature RT68 Between CN644 pin and pin3 OC3J 89

90 h Check of R.V. coil [SUZ-KA25/35VA(H)R.TH SUZ-KA50VAR2.TH] First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to "2-4. Trouble criterion of main parts" In case CN72 is not connected or R.V. coil is open, voltage is generated between the terminal pins of the connector although any signal is not being transmitted to R.V. coil. Check if CN72 is connected. Unit operates COOL mode even if it is set to HEAT mode. Disconnect connector (CN6) between the compressor and the intelligent power module. Turn ON the power supply and press EMERENCY OPERATION switch twice (HEAT mode). Is there 2 V AC between CN72 and on the inverter P.C. board 3 minutes after the power supply is turned ON? Replace the inverter P.C. board. Replace the 4-way valve. Unit operates HEAT mode even if it is set to COOL mode. Disconnect connector (CN6) between the compressor and the intelligent power module. Turn ON the power supply and press EMERENCY OPERATION switch once (COOL mode). Is there 2 V AC between CN72 and on the inverter P.C. board 3 minutes after the power supply is turned ON? Replace the 4-way valve. Replace the inverter P.C. board. i Check of outdoor fan motor Check the connection between the connector CN93 and CN9. Is the resistance between each terminal of outdoor fan motor normal? (Refer to 2-4.) Disconnect CN9 from outdoor electronic control P.C. board or the inverter P.C. board, and turn on the power supply. Rotate the outdoor fan motor manually and measure the voltage of CN93. Between (+) and 5( ) Between 2(+) and 5( ) Between 3(+) and 5( ) Replace the outdoor fan motor. (Fixed to either 5 or 0 V DC) Does the voltage between each terminal become 5 and 0 V DC repeatedly? Does the outdoor fan motor rotate smoothly? Replace the outdoor electronic control P.C. board or the inverter P.C. board. OC3J 90

91 j Check of power supply [SUZ-KA25/35VA(H)R.TH SUZ-KA50VAR2.TH] V DC Disconnect the connector (CN6) between compressor and intelligent power module. Turn ON power supply and press EMERENCY OPERATION switch. Does the left lamp of OPERATION INDICATOR lamp on the indoor unit light up? Rectify indoor/outdoor connecting wire. Is there voltage 2 VAC between the indoor terminal block S and S2? DB6 Inverter P.C. board (Solder side) Replace the indoor electronic control P.C. board. Is there voltage VDC between DB6 (+) and DB6 ( ) on the inverter P.C. board? (Refer to or ) Dose LED on the inverter P.C. board light up or flash? (Refer to or ) Replace the inverter P.C. board. Check the electric parts in main circuit. If light up, OK. If flash, refer to 2-3. k Check of LEV (For wireless remote controller use model) Turn ON the power supply. <Preparation of the remote controller> While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time, press RESET button. First, release RESET button. And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds. ON/OFF AUTO COOL HEAT TOO WARM DRY MODE FAN VANE TOO COOL SELECT TIME RESET Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. * Expansion valve operates in full-opening direction. ON/OFF TOO WARM h TOO COOL Do you hear the expansion valve "click, click "? Do you feel the expansion valve vibrate on touching it? OK *. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received. Is LEV coil properly fixed to the expansion valve? Does the resistance of LEV coil have the characteristics? (Refer to 2-4.) Replace the LEV coil. Properly fix the LEV coil to the expansion valve. Measure each voltage between connector pins of CN7 on the inverter P.C. board.. Pin ( ) Pin (+) 2. Pin ( ) Pin (+) 3. Pin ( ) Pin (+) 4. Pin ( ) Pin (+) Is there about 3 to 5 V AC between each? NOTE: Measure the voltage by an analog tester. Replace the expansion valve. NOTE : After check of LEV, do the undermentioned operations.. Turn OFF the power supply and turn ON it again. 2. Press RESET button on the remote controller. OC3J 9

92 [SUZ-KA25/35VA(H)R.TH SUZ-KA50VAR2.TH] m Check of LEV (Expansion valve) (For wired remote controller use model) Start Turn on power supply to the outdoor unit after checking LEV coil is fixed to the LEV body securely. rmal Is "click - click" sound heard? Or, do you feel vibration of the LEV coil with a hand? Disconnect the connector CN7 is there normal resistance to LEV coil? Replace the inverter P.C. board. Replace the LEV coil. n Check of inverter P.C. board Check the outdoor fan motor. (Refer to i.) Is the fuse (F90) blown on the inverter P.C. board? Check the connection of the connectors (CN93, CN9) of the outdoor fan motor. If the connection is poor, make it correct. Operate the outdoor unit by starting EMERENCY OPERATION. Check the LED indication on the inverter P.C. board. Does the LED flash 0 times? (0-time flash) Check the corresponding parts following LED indication. (Refer to 2-3.) Replace the inverter P.C. board. OC3J 92

93 p How to check miswiring and serial signal error [SUZ-KA25/35VA(H)R.TH (For wireless remote controller use model) SUZ-KA50VAR2.TH] Turn OFF the power supply. Is there rated voltage in the power supply? Turn ON the power supply. Check the power supply. Is there rated voltage between outdoor terminal block S and S2? Check the wiring. Press EMERENCY OPERATION switch once. Does the left lamp of OPERATION INDICA- TOR lamp light up? <Confirmation of the power to the indoor unit> Is serial signal error indicated 6 minutes later? Is there any miswiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Correct them. A A Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON again. Press EMERENCY OPERATION switch. Is serial signal error indicated 6 minutes later? B As for indoor unit. Reinstall either the unit or the light away from each other. Attach a filter on remote control receiving section of the indoor unit. B Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not miswiring. Short-circuit outdoor terminal block S2 and S3. * Turn ON the power supply. Does the LED on the inverter P.C. board or the outdoor electronic control P.C. board repeat "3.6-second-OFF and 0.8-second- ON quick blinking"? *3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S2? <Confirmation of power voltage> *. Miswiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. *3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C. board or the outdoor electronic control P.C. board is normal, LED blinks 6 times after 3 minutes. (Lighted or not lighted) Replace the indoor electronic control P.C. board. Be sure to release the failure-mode recall function after checking. Replace the inverter P.C. board or the outdoor electronic control P.C. board. *2 *2. Be careful of the residual voltage of smoothing capacitor. Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Replace the indoor/ outdoor connecting wire. Replace the indoor/ outdoor connecting wire. OC3J 93

94 q How to check miswiring and serial signal error [SUZ-KA25/35VA(H)R.TH (For wired remote controller use model) SUZ-KA50VAR2.TH] Turn OFF the power supply. Is there rated voltage in the power supply? Turn ON the power supply. Check the power supply. Is there rated voltage between outdoor terminal block S and S2? Check the wiring. Press TEST button once. Does the left lamp of OPERATION INDICA- TOR lamp light up? <Confirmation of the power to the indoor unit> Is serial signal error indicated 6 minutes later? Is there any miswiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Correct them. A A Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON again. Press EMERENCY OPERATION switch. Is serial signal error indicated 6 minutes later? B As for indoor unit. Reinstall either the unit or the light away from each other. Attach a filter on remote control receiving section of the indoor unit. B Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not miswiring. Short-circuit outdoor terminal block S2 and S3. * Turn ON the power supply. Does the LED on the inverter P.C. board or the outdoor electronic control P.C. board repeat "3.6-second-OFF and 0.8-second- ON quick blinking"? *3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S2? <Confirmation of power voltage> *. Miswiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. *3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C. board or the outdoor electronic control P.C. board is normal, LED blinks 6 times after 3 minutes. (Lighted or not lighted) Replace the indoor electronic control P.C. board. Be sure to release the failure-mode recall function after checking. Replace the inverter P.C. board or the outdoor electronic control P.C. board. *2 *2. Be careful of the residual voltage of smoothing capacitor. Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? Replace the indoor/ outdoor connecting wire. Replace the indoor/ outdoor connecting wire. OC3J 94

95 [SUZ-KA25/35VA(H)R.TH SUZ-KA50VAR2.TH] r Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the antennas and the indoor unit within 3 m, or is the distance between the antennas and the outdoor unit within 3 m? Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit. Is the distance between the TV sets or radios and the indoor unit within m, or is the distance between the TV sets or radios and the outdoor unit within 3 m? Extend the distance between the TV sets and/or radios and the indoor unit, or the TV sets or radios and the outdoor unit. Are the antennas damaged? Is the coaxial cable damaged? Is there any poor contact in the antenna wiring? Replace or repair the antenna. Replace or repair the coaxial cable. Is the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas close? Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas. Even if all of the above conditions are fulfilled, the electromagnetic noise may enter, depending on the electric field strength or the installation condition (combination of specific conditions such as antennas or wiring). Check the following before asking for service.. Devices affected by the electromagnetic noise TV sets, radios (FM/AM broadcast, shortwave) 2. Channel, frequency, broadcast station affected by the electromagnetic noise 3. Channel, frequency, broadcast station unaffected by the electromagnetic noise 4. Layout of ; indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, earth wire, antennas, wiring from antennas, receiver 5. Electric field intensity of the broadcast station affected by the electromagnetic noise 6. Presence or absence of amplifier such as booster 7. Operation condition of air conditioner when the electromagnetic noise enters in ) Turn OFF the power supply once, and then turn ON the power supply. In this situation, check for the electromagnetic noise. 2) Within 3 minutes after turning ON the power supply, press OPERATE/STOP (ON/OFF) button on the remote controller for power ON, and check for the electromagnetic noise. 3) After a short time (3 minutes later after turning ON), the outdoor unit starts running. During operation, check for the electromagnetic noise. 4) Press OPERATE/STOP (ON/OFF) button on the remote controller for power OFF, when the outdoor unit stops but the indoor/outdoor communication still runs on. In this situation, check for the electromagnetic noise. OC3J 95

96 2-6. Test point diagram and voltage Inverter P.C. board SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAH.TH SUZ-KA35VAH.TH Back side of unit DB V DC (+) ( ) 2 V AC DB6 Smoothing capacitor (C63C) Smoothing capacitor (C63B) Smoothing capacitor (C63A) Fuse (F80) Fuse (F90) LED monitor lamp Output to drive compressor (LDW, LDV, LDU) (+) 2(+) 3(+) 45V 5ND Rotational frequency feedback signal of outdoor fan motor (CN93) Jumper wire for change in defrost setting (JS) Front side of unit Connecting wire with power P.C. board (CN725) LEV connector (CN7) Defrost thermistor/rt6 (CN64) Discharge temperature thermistor/rt62 (CN64) Ambient temperature thermistor /RT65 (CN643) Fin temperature thermistor/rt64 (CN642) Output to drive outdoor fan motor (CN9) Connector for indoor/ outdoor communication (CN60) Resistance(k") Fin temperature thermistor(rt64) Temperature(:) Resistance(k") Defrost thermistor(rt6) Ambient temperature thermistor(rt65) Temperature(:) Resistance(k") Discharge temperature thermistor(rt62) Temperature(:) OC3J 96

97 Power P.C. board SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAH.TH SUZ-KA35VAH.TH Back side of unit Varistor (NR63) Varistor (NR62) Varistor (NR64) Front side of unit 2 V AC R.V. coil (CN72) 2 V AC Connecting wire with inverter P.C.board (CN7) Refer to 2-5.M 2 V AC Heater connector (CN7) Refer to 2-5.M } SUZ-KA25VAH SUZ-KA35VAH OC3J 97

98 Inverter P.C. board SUZ-KA25VAR.TH SUZ-KA35VAR.TH SUZ-KA25VAHR.TH SUZ-KA35VAHR.TH Back side of unit 2 V AC DB6 0 0 V DC ( ) (+) Smoothing capacitor (C63) Smoothing capacitor (C62) Fuse (F80) 250 V 3.5 A Smoothing capacitor (C6) Fuse (F70) 250 V 3.5 A Heater connector (CN7) SUZ-KA25/35 VAHR.TH R.V.coil (CN72) 2 VAC Fuse (F90) 250 V 3.5 A Output to drive compressor (LDU, LDV, LDW) 2 V AC Front side of unit Output to drive outdoor fan motor (CN9) Fin temperature thermistor /RT64 (CN642) Outdoor heat exchanger temperature thermistor /RT68 (CN644) Ambient temperature thermistor /RT65 (CN643) Defrost thermistor /RT6(CN64) Discharge temperature thermistor /RT62 (CN64) LEV connector (CN7) LED monitor lamp Jumper wire for changing defrost setting (JS) Resistance(kΩ) Defrost thermistor(rt6) Ambient temperature thermistor(rt65) Outdoor heat exchanger temperature thermistor(rt68) Temperature( C) Resistance(kΩ) Discharge temperature thermistor(rt62) Temperature( C) Resistance(kΩ) Fin temperature thermistor(rt64) Temperature( C) OC3J 98

99 Outdoor electronic control P.C. board SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA60VAR2.TH SUZ-KA7VA().TH Resistance (k') Temperature (;) ( ( ( ( ( CN9 90 V AC Temperature (;) 40 Fin temperature thermistor (RT64) 0 80 ( ( ( ( ( ( ( ( Resistance (k') 40 2 V DC pulse wave ( ) CN78 ND (power board) 2 V DC ( ) Rush current relay ( ) R.V. coil (+) CN795 (+) LEV 0 5V 5V 0 To fan CN93 motor 5 V DC pulse wave 5V ND CN66 Defrost thermistor (RT6) 0 CN663 Ambient temperature thermistor (RT65) CN70 ( ) Signal transmission (+) (To power board) 5V DC pulse wave (+) CN702 Signal reception ND (From power board) ( ) 5V DC pulse wave 00 Outdoor heat exchanger temperature thermistor (RT68) 0 Discharge temperature thermistor (RT62) Resistance (k') Defrost thermistor (RT6) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) Discharge temperature thermistor (RT62) Temperature (;) LED LED 2 CN80 5 V DC 370 V DC Input F80 FUSE 3.5A/250V ( 99 ( ( OC3J SUZ-KA60VAR2 SUZ-KA7VA() CN68 High pressure switch CN60 2 V AC 50 Hz Input Serial signal Room A 5 0 V DC

100 ise filter P.C. board SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA60VAR2.TH SUZ-KA7VA().TH CN90 To electronic control P.C. board CN902 To power board CN903 To power board { { 2 V AC 50Hz Input CN92 R.V. coil 2 V AC { 2 V AC 50Hz Output { 2 V AC 50Hz Output NR64 VARISTOR F64 FUSE 2A/250V F9 FUSE A/250V OC3J 00

101 Outdoor power board SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA60VAR2 SUZ-KA7VA().TH Connect to the compressor Voltage among phases: 5 to 80 V V DC Output (Red) (+) ( ) 3 (White) Connect to the earth CN2 Connect to the controller board (+) 5( ): Signal transmission (To electronic control P.C. board) 5 V DC pulse wave 2(+) 5( ): Zero cross signal 3 4 : t used 6(+) 5( ): 5 V 7(+) 5( ): 5 V CN3 Fin temperature thermistor RT64 Signal reception (From electronic control P.C. board) 5 V DC pulse wave ) CN5 Primary current detection (Connect to the noise filter) Connect to the compressor Voltage among phases: 5V to 80V 5 370V DC Output (Red) (+) ( ) 3 (White) Connect to the earth CN2 Connect to the controller board (+) 5( ): Signal transmission (To electronic control P.C. board) 5 V DC pulse wave 2(+) 5( ): Zero cross signal 3 4 : t used 6(+) 5( ): 5 V 7(+) 5( ): 5 V CN3 Fin temperature thermistor RT64 Signal reception (From electronic control P.C. board) 5 V DC pulse wave ) CN5 Primary current detection (Connect to the noise filter) OC3J 0

102 Inverter P.C. board SUZ-KA50VAR2.TH Back side of unit 2 V AC DB6 0 0 V DC ( ) (+) Smoothing capacitor (C63) Smoothing capacitor (C62) Fuse (F80) 250 V 3.5 A Smoothing capacitor (C6) Fuse (F70) 250 V 3.5 A R.V.coil (CN72) 2 V AC Fuse (F90) 250 V 3.5 A Output to drive compressor (LDU, LDV, LDW) 2 V AC Front side of unit Fin temperature thermistor /RT64 (CN642) Outdoor heat exchanger temperature thermistor /RT68(CN644) Ambient temperature thermistor /RT65 (CN643) Defrost thermistor /RT6(CN64) Discharge temperature thermistor /RT62 (CN64) Output to drive outdoor fan motor (CN9) Signal of outdoor fan motor (CN93) LEV connector (CN7) LED monitor lamp Resistance(k ) Defrost thermistor(rt6) Ambient temperature thermistor(rt65) Outdoor heat exchanger temperature thermistor(rt68) Temperature( ) Resistance(k ) Discharge temperature thermistor(rt62) Temperature( ) Resistance(k ) Fin temperature thermistor(rt64) Temperature( ) OC3J 02

103 3 DISASSEMBLY PROCEDURE <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to () and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. () Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. Sleeve Locking lever Slide the sleeve. 2Pull the terminal while pushing the locking lever. Connector Hold the sleeve, and pull out the terminal slowly. SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAH.TH SUZ-KA35VAH.TH OUTDOOR UNIT NOTE: Turn OFF power supply before disassembling. OPERATIN PROCEDURE. Removing the cabinet. () Remove the screw fixing the service panel. (See Photo 2.) (2) Pull down the service panel and remove it. (See Photo 2.) (3) Disconnect the power supply and indoor/outdoor connecting wire. (4) Remove the screws fixing the top panel. (See Photo.) (5) Remove the top panel. (See Photo.) (6) Remove the screws fixing the cabinet. (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the back panel. Photo Screws of the top panel Screws of the cabinet PHOTOS Screws of the top panel Photo 2 Back panel Screw of the service panel Direction to remove Screws of the cabinet Service panel Hooks Screws of the cabinet OC3J 03

104 OPERATIN PROCEDURE 2. Removing the inverter assembly, inverter P.C. board and power P.C. board () Remove the top panel, cabinet and service panel. (Refer to procedure.) (2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to procedure.) (3) Disconnect the ground wires (See Photo 3.), the lead wire to the reactor and the following connectors; <Power P.C. board> CN72 (4-way valve) CN7 (Defrost heater) SUZ-KA25/KA35VAH <Inverter P.C. board> CN93,CN9 (Fan motor) CN64 (Defrost thermistor and discharge temperature thermistor) CN643 (Ambient temperature thermistor) CN7 (LEV) (4) Remove the compressor connector (CN6). (5) Remove the screws fixing the relay panel. (See Photo 3.) (6) Remove the inverter assembly. (See Photo 3.) (7) Disconnect all connectors and lead wires on the inverter P.C. board. (See Photo 4.) (8) Remove the inverter P.C. board from the inverter assembly. (9) Remove the screw fixing the power P.C. board. (See Photo 4.) (0) Disconnect all connectors and lead wires on the power P.C. board. () Remove the power P.C. board from the inverter assembly. Photo 3 Photo 4 Heat sink PHOTOS Screws of the relay panel Inverter P.C. board Power P.C. board Screws of the ground wires 3. Removing R.V. coil () Remove the top panel, cabinet and service panel. (Refer to procedure.) (2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to procedure.) (3) Remove the inverter assembly. (Refer to procedure 2.) (4) Remove the R.V. coil. (See Photo 5.) 4. Removing the discharge temperature thermistor and defrost thermistor () Remove the top panel, cabinet and service panel. (Refer to procedure.) (2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to procedure.) (3) Remove the inverter assembly. (Refer to procedure 2.) (4) Pull out the discharge temperature thermistor from its holder. (See Photo 5.) (5) Pull out the defrost thermistor from its holder. (See Photo 6.) Photo 5 Screw of the power P.C. board R.V. coil Discharge temperature thermistor OC3J 04

105 OPERATIN PROCEDURE 5. Removing outdoor fan motor () Remove the top panel, cabinet and service panel. (Refer to procedure.) (2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to procedure.) (3) Disconnect the connectors for outdoor fan motor. (4) Remove the propeller nut. (5) Remove the propeller. (6) Remove the screws fixing the fan motor. (See Photo 7.) (7) Remove the fan motor. Photo 6 PHOTOS 6. Removing the compressor and 4-way valve () Remove the top panel, cabinet and service panel. (Refer to procedure.) (2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to procedure.) (3) Remove the inverter assembly. (Refer to procedure 2.) (4) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa). (5) Detach the welded part of the suction and the discharge pipe connected with compressor. (6) Remove the nuts of compressor legs. (7) Remove the compressor. (8) Detach the welded part of pipes connected with 4-way valve. (See Photo 8.) Photo 7 Defrost thermistor Screws of the outdoor fan motor Photo 8 Propeller Welded parts of 4-way valve OC3J 05

106 SUZ-KA25VAR.TH SUZ-KA25VAHR.TH OUTDOOR UNIT SUZ-KA35VAR.TH SUZ-KA35VAHR.TH OPERATIN PROCEDURE. Removing the cabinet () Remove the screw fixing the service panel. (2) Pull down the service panel and remove it. (3) Disconnect the power supply and indoor/outdoor connecting wire. (4) Remove the screws fixing the top panel. (5) Remove the top panel. (6) Remove the screws fixing the cabinet. (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the back panel. Photo NOTE: Turn OFF power supply before disassembling. Screws of the top panel PHOTOS Screws of the top panel Back panel Screws of the cabinet Service panel Photo 2 Screw of the cabinet Screw of the service panel Direction to remove Screws of the cabinet Hooks OC3J 06

107 OPERATIN PROCEDURE 2. Removing the inverter assembly, inverter P.C. board () Remove the cabinet and panels. (Refer to procedure.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C. board> CN72 (R.V. coil) CN7 (Defrost heater) SUZ-KA25/35VAHR.TH CN9 (Fan motor) CN64 (Defrost thermistor and discharge temperature thermistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor) CN7 (LEV) (3) Remove the compressor connector (CN6). (4) Remove the screws fixing the relay panel. (Photo 3) (5) Remove the inverter assembly. (Photo 4) (6) Remove the screw of the earth wire and screw of the T.B.support. (Photo 4) (7) Remove the relay panel from the inverter assembly. (8) Remove the inverter P.C. board from the relay panel. Photo 3 PHOTOS Screws of the relay panel Photo 4 (Inverter assembly) Heat sink Inverter P.C. board Screw of the T.B.support 3. Removing R.V. coil () Remove the cabinet and panels. (Refer to procedure.) (2) Disconnect the following connectors: <Inverter P.C. board> CN72 (R.V. coil) (3) Remove the R.V. coil. (Photo 5) T.B.support Relay panel Screw of the earth wire 4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger temperature thermistor and ambient temperature thermistor () Remove the cabinet and panels. (Refer to procedure.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C. board> CN64 (Defrost thermistor and discharge temperature thermistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor) (3) Pull out the discharge temperature thermistor from its holder. (Photo 5) (4) Pull out the defrost thermistor from its holder. (Photo 6) (5) Pull out the outdoor heat exchanger temperature thermistor from its holder. (Photo 6) (6) Pull out the ambient temperature thermistor from its holder. Photo 5 R.V. coil Discharge temperature thermistor OC3J 07

108 OPERATIN PROCEDURE 5. Removing outdoor fan motor () Remove the cabinet and panels. (Refer to procedure.) (2) Disconnect the following connectors: <Inverter P.C. board> CN9 (Fan motor) (3) Remove the propeller nut. (Photo 7) (4) Remove the propeller. (Photo 7) (5) Remove the screws fixing the fan motor. (Photo 7) (6) Remove the fan motor. Photo 6 PHOTOS Outdoor heat exchanger temperature thermistor 6. Removing the compressor and 4-way valve () Remove the cabinet and panels. (Refer to procedure.) (2) Remove the inverter assembly. (Refer to procedure 2.) (3) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa). (4) Detach the welded part of the suction and the discharge pipe connected with compressor. (5) Remove the nuts of compressor legs. (6) Remove the compressor. (7) Detach the welded part of pipes connected with 4-way valve. (Photo 8) Photo 7 Defrost thermistor Screws of the outdoor fan motor Propeller Propeller nut Photo 8 Welded parts of 4-way valve OC3J 08

109 SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA50VAR2.TH SUZ-KA60VAR2.TH OUTDOOR UNIT OPERATIN PROCEDURE. Removing the cabinet () Remove the screws of the service panel. (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover. (4) Remove the service panel. (5) Remove the top panel. (6) Remove the valve cover. (7) Remove the screws of the cabinet. (8) Remove the cabinet. (9) Remove the screws of the back panel. (0) Remove the back panel. NOTE: Turn OFF power supply before disassembling. Photo Screws of the cabinet PHOTOS Screw of the top panel Photo 3 Screw of the motor support Photo 2 Screws of the cabinet Screw of the service panel Screws of the back panel Screws of the cabinet Screws of the top panel Set screws of the back panel Screw of the valve cover OC3J 09

110 OPERATIN PROCEDURE 2. Removing the inverter assembly, inverter P.C. board and power board (except for SUZ-KA50VAR2.TH) () Remove the top panel, cabinet and service panel. (Refer to.) (2) Remove the back panel. (Refer to procedure.) (3) Disconnect the following connectors; <Electronic control P.C. board> CN93 and CN9 (Fan motor) CN795 (LEV) CN66 (Discharge temperature thermistor, defrost thermistor and outdoor heat exchanger temperature thermistor) <ise filter P.C. board> CN92 (4-way valve) (4) Remove the compressor connector. (5) Remove the screws fixing the relay panel. (6) Remove the inverter assembly. (7) Disconnect all connectors and lead wires on the electronic control P.C. board. (8) Remove the electronic control P.C. board from the inverter assembly. (9) Remove the screws fixing the power board assembly. (0) Disconnect all connectors and lead wires on the power board. () Remove the power board from the inverter assembly. (2) Disconnect all connectors and lead wires on the noise filter P.C. board. (3) Remove the noise filter P.C. board from the inverter assembly. (SUZ-KA50VAR2.TH) () Remove the cabinet and panels. (Refer to procedure.) (2) Disconnect the lead wire to the reactor and the following connectors; <Inverter P.C. board> CN72 (R.V.coil) CN9 (Fan motor) CN64 (Defrost thermistor and discharge temperature thermistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor) CN7 (LEV) (3) Remove the compressor connector (CN6). (4) Remove the screws fixing the relay panel. (Photo 5) (5) Remove the inverter assembly. (Photo 6) (6) Remove the screw of the earth wire and screw of the T.B.support. (Photo 6) (7) Remove the screw of the PB fixture. (8) Remove the relay panel from the PB support. (9) Remove the inverter P.C. board from the inverter assembly. PHOTOS Photo 4 Screws of the power board assembly Screws of the relay panel Photo 5 (SUZ-KA50VAR2.TH) Photo 6 (SUZ-KA50VAR2.TH) Heat sink Hook of the PB support Inverter P.C. board PB support Screws of the relay panel Screws of the reactor Screw of the T.B.support T.B.support 3. Removing R.V. coil () Remove the top panel, cabinet and service panel. (Refer to procedure ) (2) Remove the back panel. (Refer to procedure.) (3) Disconnect the following connectors; Except for SUZ-KA50VAR2.TH <ise filter P.C. board> CN92 (R.V. coil) SUZ-KA50VAR2.TH <inverter P.C. board> CN72 (R.V. coil) (4) Remove the R.V. coil. (Photo ) Hook of the PB support Relay panel Screw of the PB fixture Screw of the earth wire OC3J 0

111 OPERATIN PROCEDURE 4. Removing the defrost thermistor, discharge temperature thermistor, outdoor heat exchanger temperature thermistor and ambient temperature thermistor () Remove the top panel, cabinet and service panel. (Refer to procedure.) (2) Remove the back panel. (Refer to procedure.) (3) Remove the inverter assembly. (Refer to procedure 2.) (4) Pull out the defrost thermistor from its holder. (Photo 8) (5) Pull out the discharge temperature thermistor from its holder. (Photo 7) (6) Pull out the outdoor heat exchanger temperature thermistor from its holder. (Photo 8) (7) Pull out the ambient temperature thermistor from its holder. (Photo 8) Photo 7 PHOTOS Discharge temperature thermistor Photo 8 Outdoor heat exchanger temperature thermistor Ambient temperature thermistor Defrost thermistor 5. Removing outdoor fan motor () Remove the top panel, cabinet and service panel. (Refer to procedure.) (2) Remove the back panel. (Refer to procedure.) (3) Disconnect the following connectors; Except for SUZ-KA50VAR2.TH <Electric control P.C. board> CN93 and CN9 (Fan motor) SUZ-KA50VAR2.TH <Inverter P.C. board> CN93 and CN9 (Fan motor) (4) Remove the propeller. (5) Remove the screws fixing the fan motor. (6) Remove the fan motor. Photo 9 Propeller Screws of the outdoor fan motor OC3J

112 OPERATIN PROCEDURE 6. Removing the compressor and 4-way valve () Remove the top panel, cabinet and service panel. (Refer to procedure.) (2) Remove the back panel. (Refer to procedure.) (3) Remove the inverter assembly. (Refer to procedure 2.) (4) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm² (0 MPa). (5) Detach the welded part of the suction and the discharge pipe connected with compressor. (Photo ) (6) Remove the compressor nuts. (7) Remove the compressor. (8) Detach the welded part of 4-way valve and pipe. (Photo 0) Photo 0 PHOTOS Welded parts of 4-way valve Photo R.V. coil Welded part of the discharge pipe Welded part of the suction pipe 7. Removing the reactor () Remove the top panel. (Refer to procedure.) (2) Disconnect the reactor lead wire. (3) Remove the screws of the reactor, and remove the reactor. Photo 2 Screws of the reactor OC3J 2