TECHNICAL & SERVICE MANUAL

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1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS TECHNICAL & SERVICE MANUAL R40A Outdoor unit [model names] SUZ-KA5VA SUZ-KA35VA SUZ-KA5VAH SUZ-KA35VAH SUZ-KA50VA SUZ-KA60VA SUZ-KA7VA [Service Ref.] SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA7VA.TH CONTENTS.OC3 REVISED EDITION-C HFC utilized R40A March 07 Revision: SUZ-KA50/60/7VA.TH are added in REVISED EDITION-C. Some descriptions have been modified. Please void OC3 REVISED EDITION-B. te: RoHS compliant products have <> mark on the spec name plate. For servicing of RoHS compliant products, refer to the RoHS Parts List. SUZ-KA5VA(H).TH SUZ-KA35VA(H).TH Indication of model name NOTE: This service manual describes technical data of the outdoor units. As for indoor units SLZ-KA5/35/50VA(L).TH and SEZ- KA35/50/60/7VA.TH, refer to the service manual OC3 and OC.. COMBINATION OF INDOOR AND OUTDOOR UNITS. TECHNICAL CHANES 3. PART NAMES AND FUNCTIONS 6 4. SPECIFICATION 7 5. NOISE CRITERIA CURVES 6. OUTLINES AND DIMENSIONS 7. WIRIN DIARAM 4 8. REFRIERANT SYSTEM DIARAM 8 9. PERFORMANCE CURVES 0. ACTUATOR CONTROL 50. SERVICE FUNCTIONS 5. TROUBLESHOOTIN 5 3. DISASSEMBLY INSTRUCTIONS PARTS LIST 9 5. RoHS PARTS LIST 97

2 Revision B: Compressor has been changed. (SUZ-KA50/60VA) Model PARTS LIST number RoHS PARTS LIST number Previous SNBFLDH E E New SNBFLDH E E COMBINATION OF INDOOR AND OUTDOOR UNITS Heat pump without electric heater Service Ref. SLZ-KA5VA(L).TH SLZ-KA35VA(L).TH SLZ-KA50VA(L).TH SEZ-KC5VA.W SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA7VA.TH MFZ-KA5VA-E MFZ-KA35VA-E MFZ-KA50VA-E Indoor unit Service Manual. OC3 OC OB409 KA5VA(H).TH KA35VA(H).TH Outdoor unit Heat pump type SUZ- KA50VA().TH KA60VA().TH KA7VA().TH (NOTE) Only the combination data of SLZ type and SEZ type have been described in this manual. Please refer to the service manual of indoor unit or the technical data book for other combination. TECHNICAL CHANES SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA7VA.TH.OUTDDOOR ELECTRONIC CONTROL P.C. BOARD has been changed..max. height difference 5m m (Except when combined with MFZ). 3.aranteed operating range Lower limit (Cooling/Outdoor) -0:DB -5:DB (Except when combined with MFZ) SUZ-KA5VA.TH SUZ-KA35VA.TH Lower limit (Heating/Outdoor) -0:DB -5:DB. SUZ-KA35VAH.TH Defrost finish temperature has been changed (Refer to ).

3 SUZ-A09VR.TH SUZ-KA5VA.TH SUZ-AVR.TH SUZ-KA35VA.TH.Indication of capacity has been changed.(btu base kw base).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-KA5VA) (KNB09FAAH KNB09FCAH: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..symbol on terminal block has been changed (to S/S/S3). SUZ-A8VR SUZ-KA50VA.TH SUZ-AVR SUZ-KA60VA.TH.Indication of capacity has been changed.(btu base kw base).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/ S/ 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. 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. 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 [5:](Mpa) Saturated steam density [5:](Kg/K) Combustibility ODP w WP w Refrigerant charge method Additional charge on leakage Kind Color Smell w :Ozone Depletion Potential : based on CFC- w :lobal Warming Potential : based on CO New refrigerant R40A HFC-: HFC-5 (50%:50%) Pseudo-azeotropic refrigerant t included A/A n combustible 0 7 From liquid phase in cylinder Possible Incompatible oil n n Previous refrigerant R R (00%) Single refrigerant Included A n combustible as phase Possible Compatible oil Light yellow n 3

4 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 each, 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.(kgf/f [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.(kgf/f [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 / UNF with threads. R40A tools Can R tools be used? Description R40A has high pressures beyond the measurement range of existing auge manifold gauges. Port diameters have been changed to prevent any other refrigerant from being charged into the unit. Charge hose as leak detector Hose material and cap size have been changed to improve the pressure resistance. Dedicated for HFC refrigerant. Torque wrench 6.35 mm and 9.5 mm.7 mm and 5.88 mm Flare tool Flare gauge New 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). Vacuum pump Provided to prevent the back flow of oil. This adapter enables you to use New adapter vacuum pumps. Electronic scale for It is difficult to measure R40A with a charging cylinder because the New refrigerant charging refrigerant bubbles due to high pressure and high-speed vaporization : t substitutable for R40A : Substitutable for R40A 4

5 . 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. 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 5

6 3 PART NAMES AND FUNCTIONS SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH OUTDOOR UNIT Air inlet (back and side) Piping Drain hose Air outlet ACCESSORIES SUZ-KA5VA.TH SUZ-KA35VA.TH Drain socket Drain outlet SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA7VA.TH OUTDOOR UNIT Air inlet (back and side) Piping Drain hose Air outlet ACCESSORIES Drain socket Drain cap [33 SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH Drain outlet 6

7 4 SPECIFICATION SLZ-KA VA(L).TH / SUZ-KA VA(H).TH Capacity Electrical data Compressor Fan motor Special remarks Outdoor Service Ref. Function Power supply Capacity Rated frequency(min.~max.) Dehumidification Air flow(high/loww) Starting current Compressor motor current Fan motor current Model Output Winding resistance(at :) Model Winding resistance(at :) Dimensions WOHOD Weight Sound level Fan speed(highw/loww, Highw/Medw/Loww) Fan speed regulator Refrigerant filling capacity(r40a) Refrigerating oil (Model) Thermistor RT6 (at 0:) Thermistor RT6 (at 00:) Thermistor RT64 (at 50:) Thermistor RT65 (at 5:) Thermistor RT6 (at 5:) Thermistor RT6 (at 00:) Thermistor RT64 (at 50:) Thermistor RT65 (at 5:) Thermistor RT68 (at 5:) kw r/h K /h A A A Coefficient of performance (C.O.P) W " " mm kg db rpm kg k" k" k" k" k" k" k" k" k" SUZ-KA5VA(H).TH Indoor Service Ref. SLZ-KA5VA(L).TH Cooling Heating Single phase V,50Hz.5(0.9-3.) 3.0( ) 0.5,058, NOTE : 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): 5m Measured under rated operating frequency. w Reference value KNB073FDVH(C) 550 U-V.53 U-W.53 V-W.53 RC0J50-AL WHT-BLK 37.5 BLK-RED 37.5 RED-WHT o550o w/650w 880w/80w/650w NEO SUZ-KA35VA(H).TH Indoor Service Ref. SLZ-KA35VA(L).TH Cooling Heating Single phase V,50Hz 3.5(.0-3.9) 4.0( )., KNB09FCAH 650 U-V U-W V-W RC0J50-AL WHT-BLK 37.5 BLK-RED 37.5 RED-WHT o550o w/760w 880w/800w/6w 3.05 NEO SUZ-KA50VA.TH SUZ-KA50VA.TH Indoor Service Ref. SLZ-KA50VA(L).TH Cooling Heating Single phase V,50Hz 4.6(.-5.) 5.0( ).,940/,650w,940/,w SNBFLDH or SNBFLDH 850 U-V U-W V-W PM8H60-UB WHT-BLK 5. BLK-RED 5. RED-WHT o850o3 53/5w 800/480w NEO /53w 800/6w 7

8 SEZ-KC VA.W, SEZ-KA VA.TH / SUZ-KA VA(H).TH Capacity Electrical data Outdoor Service Ref. Function Power supply Capacity Rated frequency(min.-max.) Dehumidification Air flow Starting current (Total) Compressor motor current Fan motor current Coefficient of performance(c.o.p) Compressor Fan motor Special remarks Model Output Winding resistance(at :) Model Winding resistance(at :) Dimensions WOHOD Weight Sound level Fan speed(highw/loww, High/Med.w/Loww) Fan speed regulator Refrigerant filling capacity(r40a) Refrigeration oil (Model) Thermistor RT6(at 0:) Thermistor RT6(at 00:) Thermistor RT64(at 50:) Thermistor RT65(at 5:) kw r/h K /h A A A W " " mm kg db(a) rpm kg k" k" k" k" SUZ-KA5VA(H).TH Indoor Service Ref. SEZ-KC5VA.W Cooling.5(0.9-3.).0, Single phase V,50Hz KNB073FDVH(C) 550 U-V.53 U-W.53 V-W.53 RC0J50-AL WHT-BLK 37.5 BLK-RED 37.5 RED-WHT o550o w/650w NEO Heating 3.0( ), w/80w/650w SUZ-KA35VA(H).TH Indoor Service Ref. SEZ-KA35VA.TH Cooling Heating Single phase V,50Hz 3.5(.0-3.9) 4.0( )., KNB09FCAH 650 U-V U-W V-W RC0J50-AL WHT-BLK 37.5 BLK-RED 37.5 RED-WHT o550o w/760w.05 NEO w/800w/6w 3 NOTE : Test conditions are based on ISO 55 Cooling : Indoor Dry-bulb temperature :Wet-bulb temperature 9: Outdoor Dry-bulb temperature 35:Wet-bulb temperature(:) Heating : Indoor Dry-bulb temperature :Wet-bulb temperature 5: Outdoor Dry-bulb temperature 7: Wet-bulb temperature 6: Refrigerant piping length (one way): 5m Measured under rated operating frequency w Reference value 8

9 SEZ-KA VA.TH / SUZ-KA VA.TH Capacity Electrical data Compressor Fan motor Special remarks Outdoor Service Ref. Function Power supply Capacity Rated frequency(min.~max.) Dehumidification Air flow(high/loww) Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Output Winding resistance(at :) Model Winding resistance(at :) Dimensions WOHOD Weight Sound level(high/loww) Fan speed(high/loww) Fan speed regulator Refrigerant filling capacity(r40a) Refrigerating oil (Model) Thermistor RT6 (at 5:) Thermistor RT6 (at 00:) Thermistor RT64 (at 50:) Thermistor RT65 (at 5:) Thermistor RT68 (at 5:) kw r/h K /h A A A W " " mm kg db rpm kg k" k" k" k" k" SUZ-KA50VA.TH SUZ-KA50VA.TH Indoor Service Ref. SEZ-KA50VA.TH Cooling Heating Single phase V,50Hz 5.0(.-5.6) 5.9(.-7.).9,940/,650w,940/,w SNBFLDH or SNBFLDH 850 U-V U-W V-W RC0J60-AA BLK-WHT 5. WHT-RED 5. RED-BLK o850o3 53/5w 800/480w NOTE : 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): 5m Measured under rated operating frequency. w Reference value NEO /53w 800/6w SUZ-KA60VA.TH SUZ-KA60VA.TH Indoor Service Ref. SEZ-KA60VA.TH Cooling Heating Single phase V,50Hz 5.5(.-6.3) 6.9( ).0,940/,650w,940/,w SNBFLDH or SNBFLDH 850 U-V U-W V-W RC0J60-AA BLK-WHT 5. WHT-RED 5. RED-BLK o850o3 53/5w 800/480w NEO /53w 800/6w SUZ-KA7VA.TH SUZ-KA7VA.TH Indoor Service Ref. SEZ-KA7VA.TH Cooling Heating Single phase V,50Hz 7.( ) 8.( ).7,940/,650w,940/,w TNB0FMCH(T) 0 U-V.4 U-W.4 V-W.4 RC0J60-AA BLK-WHT 5. WHT-RED 5. RED-BLK o850o3 53/5w 800/480w NEO /53w 800/6w 9

10 Specifications and rating conditions of main electric parts SUZ-KA5VA.TH SUZ-KA5VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH Model Item 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,TB) Relay (X63) Relay (X64) Relay (X66) R.V. coil (S4) Heater protector (H) SUZ-KA5VA.TH SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA7VA.TH SUZ-KA5VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH ETA9Z59BZ ETQ9Z7AY 6+ 4V D5XB60 50V A 50V 3.5A V W V W PS44-A-3 CAD-MDME VDC 0A 3.0mH 45m" 5W ( element) 50m" 5W ( elements) 5m" 5W 5." 5W 3P 5NB-a 4A-A-PS 5NB-a Open 45: STF-0AJ503 5NB-a Open 45: 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,,3) (CT,) (CT6) (F64) (F80) (F9) (HC9) (HPS) (IPM) (L) (LEV) (PFC) (R64A,B) (R937A,B) (RS~4) (SSR6) (TB) (TB) (X64) (S4) SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH V ETQ9Z68AY ETQ9Z53AY 50V A 50V 3.5A 50V A PS6-RZ PS44-A 340µH A CAM-MDME PS559-A 0" 0W." W % 0.04" 7W TLP3506 3P 3P 4A LD03 SUZ-KA7VA.TH SUZ-KA7VA.TH ACB-DB56 0

11 5 NOISE CRITERIA CURVES SUZ-KA5VA.TH SUZ-KA5VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.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-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA7VA.TH OUTDOORUNIT FAN SPEED High FUNCTION SPL(dB(A)) LINE COOLIN 53 HEATIN 55 m MICROPHONE OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (:) Heating : Dry-bulb temperature 7: Wet-bulb temperature 6: APPROXIMATE THRESHOLD OF HEARIN FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES, Hz NC-70 NC-60 NC-50 NC-40 NC- NC-

12 6 OUTLINES AND DIMENSIONS SUZ-KA5VA.TH SUZ-KA5VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH Unit: mm OUTDOOR UNIT 400 Air in Drain hole [4 (SUZ-KA5/KA35VA) Drain hole [33 (SUZ-KA5/KA35VAH) REQUIRED SPACE 00mm or more Basically open 00mm or more without any obstruction in front and on both sides of the unit. 00mm or more Air in Bolt pitch for installation 4~5 0mm or more 350mm or more.3 holes 0X Air out Service panel Open two sides of left, right, or rear side. Handle Liquid refrigerant pipe joint Refrigerant pipe (flared) [ Service port as refrigerant pipe joint Refrigerant pipe (flared) [ Bolt pitch for installation 800

13 SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA7VA.TH Unit: mm OUTDOOR UNIT REQUIRED SPACE mm or more Open as a rule 500mm or more if the front and both sides are open 00mm or more 0mm or more if there are obstacles to both sides Open as a rule 500mm or more if the back, both sides and top are open 350mm or more Service panel Liquid refrigerant pipe joint Refrigerant pipe(flared) [6.35 (SUZ-KA50/KA60VA) [9.5 (SUZ-KA7VA) as refrigerant pipe joint Refrigerant pipe(flared) [.7 (SUZ-KA50VA) [5.88 (SUZ-KA60/KA7VA) 3

14 7 WIRIN DIARAM SUZ-KA5VA.TH SUZ-KA35VA.TH OUTDOOR UNIT L6 BLK BLK BLK TAB63 F6 TB WHT V~ MODELS WIRIN DIARAM U S BLK WHT LD-U LD-V U DB6 L63 L6 TAB6 WHT CT76 P R64A R64B BLU S wc W RED RED V F80 C63B LD-W N C63C C63A LD70 X64 TAB6 RED S3 -V CN6 3 NR63 TO INDDOR UNIT CONNECTIN 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 S4 CN7 DSA6 TR8 RN N LDE ~/N V 50Hz CN7 RN/YLW 6 IC9 R83 DB65 PE POWER SUPPLY INVERTER P.C. BOARD LDY CN75 CN7 4 CN CN9 CN64 CN64 34 CN643 CN POWER P.C. BOARD RN MF RT6 RT6 RT64 RT65 WHITE BLU RED NOTE:. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing..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 R.V. COIL EXPANSION VALVE COIL SYMBOL SYMBOL L6 L6,L63 MC MF NR63,NR64 RT6 RT6 RT64 RT65 NAME SYMBOL R6,R83 CURRENT TRANSFORMER CT,CT76,CT78 R64A,R64B C63A,C63B,C63C TB,TB TR8 T80 X63,X64 S4 LEV NAME REACTOR CMC COIL COMPRESSOR OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR DISCHARE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR AMBIENT TEMPERATURE THERMISTOR SMOOTHIN CAPACITOR DIODE MODULE SURE ABSORBER FUSE (TAL50V) FUSE (T3.5AL50V) FUSE (T3.5AL50V) INTELLIENT POWER DEVICE INTELLIENT POWER MODULE DB6,DB65 DSA6 F6 F7 F80,F90 IC80 IPM,IC9 4

15 SUZ-KA5VAH.TH SUZ-KA35VAH.TH OUTDOOR UNIT MODELS WIRIN DIARAM L6 BLK BLK BLK U W BLK WHT LD-U LD-V U DB6 CT76 P TAB63 R64A MC RED RED V SYMBOL CT,CT76,CT78 C63A,C63B,C63C DB6,DB65 DSA6 F6 F7 F80,F90 IC80 IPM,IC9 LEV SYMBOL L6 L6,L63 MC MF NR63,NR64 RT6 RT6 RT64 RT65 R6,R83 SYMBOL R64A,R64B TB,TB TR8 T80 X63,X64,X66 S4 H H NAME CURRENT TRANSFORMER SMOOTHIN CAPACITOR DIODE MODULE SURE ABSORBER FUSE (TAL50V) FUSE (T3.5AL50V) FUSE (T3.5AL50V) INTELLIENT POWER DEVICE INTELLIENT POWER MODULE EXPANSION VALVE COIL F C63C CT 4 3 F90 IC9 LDY CN9 NOTE:. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing..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 R.V. 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 CN643 CN64 CN64 CN CN RN F6 TAB6 WHT BLK BLK BLK BLK MF RT65 RT6 RT6 RT64 BLK BLK RED YLW BLK TAB6 X66 CN7 3 L6 CN6 CN7 L63 6 CN75 CN7 4 POWER P.C. BOARD 3 LD-W N C63B C63A LD70 X64 W V WHT IPM CT78 R6 CN7 BLU T80 LD69 TB800 S4 IC80 CN7 TR8 BLK X63 LEV -V 6 F7 R83 DB65 INVERTER P.C. BOARD TO INDDOR UNIT CONNECTIN CIRCUIT BREAKER ~/N V 50Hz POWER SUPPLY V~ S S S3 L N TB TB PE RN/YLW H H BLU WHITE R64B WHT BLU RED RED 5

16 SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH OUTDOOR UNIT MODELS WIRIN DIARAM PFC L RED W CT TAB POWER SUPPLY ~/N V 50Hz R 3 X64 BRN CIRCUIT BREAKER CB3 CB CB RED RED S 3 4 YLW R64B R64A F64 TB NF L W MC YLW TAB4 BLU V V IPM BLK BLK NR64 CN5 N U CT6 TAB PE WHT CN903 BLK U CT RS3 RS BLK SSR6 RN/YLW RS4 RS CN CN CN90 F9 CN90 3 LDE CN9 CN6 3 RT64 NOISE FILTER P.C.BOARD POWER BOARD LD9 LD LD CN4 5 LDE 7 BLU BLU RN RN RN WHT WHT BLU RED BLK BLK BLK BLK BLK BLK BLK BLK BLK BLK S4 TO INDOOR UNIT CONNECTIN RY PNK ORN BLU YLW 3 CN CN CN78 ELECTRONIC CONTROL P.C.BOARD WHT CN60 V~ TB S 3 BLU F80 CN795 CN CN663 S RED -V 5 RED WHT BLK CN CN80 MF T80 S3 HC9 R937A 6 CN9 LEV R937B RT6 RT6 RT68 RT65.About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing..use copper conductors only (for field wiring). 3.Symbols below indicate. :Terminal block :Connector NOTES: SYMBOL NAME RT64 FIN TEMPERATURE THERMISTOR RT65 AMBIENT TEMPERATURE THERMISTOR SYMBOL NAME OUTDOOR FAN MOTOR NOISE FILTER MC COMPRESSOR MF OUTDOOR HEAT EXCHANER TEMPERATURE THERMISTOR RT68 NF NR64 VARISTOR SOLENOID COIL RELAY T80 TRANSFORMER SSR6 POWER FACTOR CONTROLLER PFC R64A,B RESISTOR F9 HC9 INTELLIENT POWER MODULE SYMBOL NAME CB~3 SMOOTHIN CAPACITOR CT, CURRENT TRANSFORMER CT6 CURRENT TRANSFORMER F64 FUSE (TAL 50V) F80 FUSE (T3.5AL 50V) FUSE (TAL 50V) TB TERMINAL BLOCK TB TERMINAL BLOCK R937A, B RESISTOR RS~4 RESISTOR X64 RELAY S4 R.V. COIL DEFROST THERMISTOR DISCHARE TEMPERATURE THERMISTOR RT6 RT6 IPM INTELLIENT POWER MODULE L REACTOR LEV EXPANSION VALVE COIL 6

17 SUZ-KA7VA.TH SUZ-KA7VA.TH OUTDOOR UNIT MODEL WIRIN DIARAM X64 3 R64A R64B TAB4 RED 3 L 4 RED YLW WHT BLU BLK LDE CN9 CN90 CN903 YLW BRN NOISE FILTER P.C.BOARD TO INDOOR UNIT CONNECTIN V~ TB S -V RN/YLW S3 3 CN6 RED CN663 5 CN3 PFC POWER SUPPLY ~/N V 50Hz CIRCUIT BREAKER RED HPS RED RT65 NR64 CN90 3 RS RS3 RS RS4 LD9 POWER BOARD RN RT64 F80 RED WHT CB CB CB3 BLU WHT BLU NF ELECTRONIC CONTROL P.C.BOARD CN68 BLK BLK BLK IPM CT 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 CN CN795 6 CN4 W 3 CN60 S TAB CT6 3 CN CN70 CN70 LD 3 LD CN80 CN LDE F9 F64 TB L N PE TAB S4 R S CN CN5 RT6 RT6 RT68 LEV T80 R937A R937B CN9 V V WHT W MC U MF SYMBOL NAME CB~3 SMOOTHIN CAPACITOR CT, CURRENT TRANSFORMER CT6 CURRENT TRANSFORMER F64 FUSE (TAL 50V) F80 FUSE (T3.5AL 50V) F9 FUSE (TAL 50V) HC9 INTELLIENT POWER MODULE HPS HIH PRESSURE SWITCH IPM INTELLIENT POWER MODULE L REACTOR LEV EXPANSION VALVE COIL SYMBOL NAME MC COMPRESSOR MF RT6 RT6 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 TB TERMINAL BLOCK X64 RELAY S4 R.V. COIL NOTES:.About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing..use copper conductors only (for field wiring). 3.Symbols below indicate. :Terminal block :Connector 7

18 8 REFRIERANT SYSTEM DIARAM SUZ-KA5VA.TH SUZ-KA5VAH.TH OUTDOOR UNIT Unit:mm Refrigerant pipe [9.5 (with heat insulator) Muffler 4-way valve Flared connection Stop valve (with service port) Discharge temperature thermistor RT6 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 [.0 0 Stop valve (with strainer) Expansion valve Muffler Strainer #00 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating SUZ-KA35VA.TH SUZ-KA35VAH.TH OUTDOOR UNIT Unit:mm Refrigerant pipe [9.5 (with heat insulator) 4-way valve Muffler Flared connection Stop valve (with service port) Discharge temperature thermistor RT6 Muffler Compressor Defrost thermistor RT6 Outdoor heat exchanger Ambient temperature thermistor RT65 Capillary tube [3.0 [.8 600( ) Flared connection Refrigerant pipe [6.35 (with heat insulator) Muffler Stop valve (with strainer) Expansion valve Strainer #00 R.V. coil heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating 8

19 SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH OUTDOOR UNIT Refrigerant pipe [.7 (SUZ-KA50VA) (with heat insulator) [5.88 (SUZ-KA60VA) 4-way valve Muffler #00 Unit:mm Flared connection Stop valve (with service port) Discharge temperature thermistor RT6 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 [.4 50 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 OUTDOOR UNIT Refrigerant pipe [5.88 (with heat insulator) Capillary tube [.8 [ Oil separator High-pressure 4-way valve switch Unit:mm Flared connection Stop valve (with service port) Strainer Defrost #00 thermistor RT6 Discharge temperature thermistor RT6 Outdoor heat exchanger Ambient temperature thermistor RT65 Refrigerant pipe [9.5 (with heat insulator) Flared connection Strainer Receiver #00 Stop valve Capillary tube [3.6 [.4 50 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 9

20 SUZ-KA5VA.TH SUZ-KA5VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH MAX. REFRIERANT PIPIN LENTH Models SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH Refrigerant piping Max. length : m A Piping size O.D : mm as Liquid MAX. HEIHT DIFFERENCE Indoor unit (SLZ/SEZ) w Max. Height difference m Refrigerant Piping Max. length A Outdoor unit w Height difference should be within m regardless of which unit, indoor or outdoor position is high. ADDITIONAL REFRIERANT CHARE (R40A:g) Models Outdoor unit precharged 5m 6m 7m Refrigerant piping length (one way) 8m 9m 0m m m 3m 4m 5m m SUZ-KA5VA.TH SUZ-KA5VAH.TH SUZ-KA35VA.TH SUZ-KA35VAH.TH, Calculation : Xg=g/mo(Refrigerant piping length(m) - 5)

21 SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA7VA.TH MAX. REFRIERANT PIPIN LENTH Model SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.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) w Max. Height difference m Refrigerant Piping Max. length A Outdoor unit w Height difference should be within m regardless of which unit, indoor or outdoor position is high. Max. Height difference of SUZ-KA50/60/7VA.TH : 5m SUZ-KA50/60/7VA.TH : m ADDITIONAL REFRIERANT CHARE(R40A : g) Model Outdoor unit precharged 7m 0m Refrigerant piping length (one way) 5m m 5m m SUZ-KA50VA.TH SUZ-KA50VA.TH, SUZ-KA60VA.TH SUZ-KA60VA.TH, Calculation : Xg=g/m (Refrigerant piping length (m) 7) Model SUZ-KA7VA.TH SUZ-KA7VA.TH Outdoor unit precharged 7m 0m Refrigerant piping length (one way) 5m m 5m m, ,5 Calculation : Xg=55g/mo(Refrigerant piping length(m)-7)

22 9 PERFORMANCE CURVES SLZ-KA5VA(L).TH / SUZ-KA5VA.TH, SUZ-KA5VAH.TH SLZ-KA35VA(L).TH / SUZ-KA35VA.TH, SUZ-KA35VAH.TH SLZ-KA50VA(L).TH / SUZ-KA50VA.TH, SUZ-KA50VA.TH 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% (7~53V), 50Hz () 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 () Indoor outlet air wet-bulb temperature : W.B. C () 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 sets of wet-and-dry-bulb thermometers to the indoor air inlet as shown in the figure, and at least 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.. Attach at least 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

23 Indoor air Wet-bulb temperature difference (degree) SUZ-KA5VA(H).TH Rated frequency 58Hz 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).TH Rated frequency 73Hz 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.TH Rated frequency 75Hz Outdoor intake air Dry-bulb temperature (:) Outdoor intake air Dry-bulb temperature (:) 3

24 Indoor air Dry-bulb temperature difference (degree) Indoor intake air Dry-bulb temperature (:) Indoor intake air Dry-bulb temperature (:) SUZ-KA5VA(H).TH Rated frequency 77Hz SUZ-KA35VA(H).TH Rated frequency 77Hz SUZ-KA50VA.TH Rated frequency 65Hz 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-KA5VA(H).TH (Hz) The operational frequency of compressor Input correction factors Correction of Cooling total input SUZ-KA5VA(H).TH SUZ-KA5VA(H).TH SUZ-KA5VA(H).TH (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).TH SUZ-KA35VA(H).TH SUZ-KA35VA(H).TH SUZ-KA35VA(H).TH (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().TH SUZ-KA50VA().TH SUZ-KA50VA().TH SUZ-KA50VA().TH (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.. 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 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.(kgf/f [auge])

25 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Both indoor and outdoor unit are under the same temperature/humidity condition. Air flow : High speed 3 Operational frequency : 58Hz(SUZ-KA5VA(H).TH) 73Hz(SUZ-KA35VA(H).TH) 75Hz(SUZ-KA50VA().TH) Dry-bulb temperature Relative humidity(%) (kgf/f [auge]) (MPa [auge]) 4.4 Outdoor low pressure SUZ-KA5VA(H).TH. 58Hz ( C) (%) Ambient temperature( C) Ambient humidity(%) (kgf/f [auge]) (MPa [auge]) 4.4 Outdoor low pressure SUZ-KA35VA(H).TH 73Hz ( C) (%) Ambient temperature( C) Ambient humidity(%) (kgf/f [auge]) (MPa [auge]) 4.4 Outdoor low pressure SUZ-KA50VA().TH. 75Hz ( C) (%) Ambient temperature( C) Ambient humidity(%) 4 SUZ-KA5VA(H).TH 5 SUZ-KA35VA(H).TH 9.0 SUZ-KA50VA().TH Outdoor unit current(a) Hz Outdoor unit current(a) Hz Outdoor unit current(a) Hz ( 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,7,5,.0 C Wet bulb temperature,6,,4.5 C 3.0 SUZ-KA5VA(H).TH 4.0 SUZ-KA35VA(H).TH 7.0 SUZ-KA50VA().TH Outdoor unit current (A) Hz Outdoor unit current (A) Hz Outdoor unit current (A) Hz (:) Ambient temperature( C) (:) Ambient temperature( C) (:) Ambient temperature( C) 5

26 SEZ-KC5VA.W / SUZ-KA5VA.TH, SUZ-KA5VAH.TH SEZ-KA35VA.TH / SUZ-KA35VA.TH, SUZ-KA35VAH.TH SEZ-KA50VA.TH / SUZ-KA50VA.TH, SUZ-KA50VA.TH SEZ-KA60VA.TH / SUZ-KA60VA.TH, SUZ-KA60VA.TH SEZ-KA7VA.TH / SUZ-KA7VA.TH, SUZ-KA7VA.TH 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% (7~53V), 50Hz () 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 () Indoor outlet air wet-bulb temperature : W.B. C () 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 sets of wet-and-dry-bulb thermometers to the indoor air inlet as shown in the figure, and at least 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.. Attach at least 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 w The picture is SEZ-KA35, 50, 60, 7VA. SEZ-KC5VA is similar to SEZ-KA35, 50, 60, 7VA.

27 Indoor air Wet-bulb temperature difference (degree) SUZ-KA5VA(H).TH Rated frequency 63Hz 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).TH Rated frequency 73Hz Outdoor intake air Dry-bulb temperature (:) Outdoor intake air Dry-bulb temperature (:) Indoor air Wet-bulb temperature difference (degree) SUZ-KA50VA.TH Rated frequency 80Hz SUZ-KA60VA.TH Rated frequency 86Hz SUZ-KA7VA.TH Rated frequency 6Hz Indoor intake air Wet-bulb temperature(:) Outdoor intake air Dry-bulb temperature (:) Indoor intake air Wet-bulb temperature(:) Outdoor intake air Dry-bulb temperature (:)

28 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-KA5VA(H).TH Rated frequency 77Hz SUZ-KA35VA(H).TH Rated frequency 77Hz SUZ-KA50VA().TH Rated frequency 80Hz SUZ-KA60VA().TH Rated frequency 96Hz 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().TH Rated frequency 6Hz Outdoor intake air Wet-bulb temperature (:) Outdoor intake air Wet-bulb temperature (:) NOTE:The above curves are for the heating operation without any frost.

29 Capacity correction factors SUZ-KA5VA(H).TH SUZ-KA5VA(H).TH SUZ-KA5VA(H).TH SUZ-KA5VA(H).TH 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).TH SUZ-KA35VA(H).TH SUZ-KA35VA(H).TH SUZ-KA35VA(H).TH 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().TH SUZ-KA50VA().TH SUZ-KA50VA().TH SUZ-KA50VA().TH 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().TH SUZ-KA60VA().TH SUZ-KA60VA().TH SUZ-KA60VA().TH 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().TH SUZ-KA7VA().TH SUZ-KA7VA().TH SUZ-KA7VA().TH 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

30 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.. Test run operation starts and continue 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.(kgf/f [auge]) OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Both indoor and outdoor unit are under the same temperature/humidity condition. Air flow : High speed 3 Operational frequency : 63Hz(SUZ-KA5VA(H).TH) 73Hz(SUZ-KA35VA(H).TH) 80Hz(SUZ-KA50VA().TH) 87Hz(SUZ-KA60VA().TH) 6Hz(SUZ-KA7VA().TH) Dry-bulb temperature Relative humidity(%) SUZ-KA5VA(H).TH SUZ-KA35VA(H).TH SUZ-KA50VA().TH SUZ-KA60VA().TH (kgf/f [auge]) (MPa [auge]) (kgf/f [auge]) (MPa [auge]) Outdoor low pressure. 63Hz Outdoor low pressure Hz (kgf/f [auge]) (MPa [auge]) 4.4 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 6Hz Outdoor low pressure SUZ-KA7VA().TH ( C) (%) Ambient temperature( C) Ambient humidity(%) 80Hz (kgf/f [auge]) (MPa [auge]) Hz Outdoor low pressure Outdoor unit current(a) SUZ-KA5VA(H).TH 63Hz Outdoor unit current(a) SUZ-KA35VA(H).TH 73Hz Outdoor unit current(a) SUZ-KA50VA().TH 80Hz Outdoor unit current(a) SUZ-KA60VA().TH 87Hz ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) ( C) (%) Ambient temperature( C) Ambient humidity(%) Outdoor unit current(a) SUZ-KA7VA().TH 6Hz ( C) (%) Ambient temperature( C) Ambient humidity(%)

31 HEAT operation Condition indoor: Dry bulb temperature.0 C Wet bulb temperature 4.5 C Condition outdoor: Dry bulb temperature,7,5,.0 C Wet bulb temperature,6,,4.5 C Outdoor unit current (A) SUZ-KA5VA(H).TH 58Hz Outdoor unit current (A) SUZ-KA35VA(H).TH 58Hz Outdoor unit current (A) SUZ-KA50VA().TH 58Hz Outdoor unit current (A) SUZ-KA60VA().TH 58Hz (:) Ambient temperature( C) (:) Ambient temperature( C) (:) Ambient temperature( C) (:) Ambient temperature( C) SUZ-KA7VA().TH 3.0 Outdoor unit current (A) Hz (:) Ambient temperature( C) 3

32 PERFORMANCE DATA COOLIN operation Rated frequency 58Hz SLZ-KA5VA(L).TH / SUZ-KA5VA.TH, SUZ-KA5VAH.TH CAPACITY :.5(kW) INPUT : 690(W) SHF : 0.86 OUTDOOR D.B.(;) INDOOR INDOOR 5 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

33 PERFORMANCE DATA COOLIN operation Rated frequency 58Hz SLZ-KA5VA(L).TH / SUZ-KA5VA.TH, SUZ-KA5VAH.TH CAPACITY :.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 33

34 PERFORMANCE DATA COOLIN operation Rated frequency 73Hz SLZ-KA35VA(L).TH / SUZ-KA35VA.TH, SUZ-KA35VAH.TH CAPACITY : 3.5(kW) INPUT : 060(W) SHF : 0.77 OUTDOOR D.B.(;) INDOOR INDOOR 5 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 34

35 PERFORMANCE DATA COOLIN operation Rated frequency 73Hz SLZ-KA35VA(L).TH / SUZ-KA35VA.TH, SUZ-KA35VAH.TH 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 35

36 36 OUTDOOR D.B.(;) INDOOR INDOOR 5 D.B.(;) W.B.(;) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation Rated frequency 65Hz SLZ-KA50VA(L).TH / SUZ-KA50VA.TH SUZ-KA50VA.TH 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

37 37 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 Rated frequency 65Hz SLZ-KA50VA(L).TH / SUZ-KA50VA.TH SUZ-KA50VA.TH 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

38 PERFORMANCE DATA COOLIN operation Rated frequency 63Hz SEZ-KC5VA.W / SUZ-KA5VA.TH, SUZ-KA5VAH.TH CAPACITY :.5(kW) INPUT : 7(W) SHF : 0.74 OUTDOOR D.B.(;) INDOOR INDOOR 5 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 38

39 PERFORMANCE DATA COOLIN operation Rated frequency 63Hz SEZ-KC5VA.W / SUZ-KA5VA.TH, SUZ-KA5VAH.TH CAPACITY :.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 39

40 PERFORMANCE DATA COOLIN operation Rated frequency 73Hz SEZ-KA35VA.TH / SUZ-KA35VA.TH, SUZ-KA35VAH.TH CAPACITY : 3.5(kW) INPUT : 060(W) SHF : 0.77 OUTDOOR D.B.(;) INDOOR INDOOR 5 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 40

41 PERFORMANCE DATA COOLIN operation Rated frequency 73Hz SEZ-KA35VA.TH / SUZ-KA35VA.TH, SUZ-KA35VAH.TH 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 4

42 4 OUTDOOR D.B.(;) INDOOR INDOOR 5 D.B.(;) W.B.(;) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation Rated frequency 80Hz SEZ-KA50VA.TH / SUZ-KA50VA.TH SUZ-KA50VA.TH 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

43 43 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 Rated frequency 80Hz() SEZ-KA50VA.TH / SUZ-KA50VA.TH SUZ-KA50VA.TH 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

44 44 OUTDOOR D.B.(;) INDOOR INDOOR 5 D.B.(;) W.B.(;) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT PERFORMANCE DATA COOLIN operation Rated frequency 87Hz SEZ-KA60VA.TH / SUZ-KA60VA.TH SUZ-KA60VA.TH 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

45 45 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 Rated frequency 87Hz SEZ-KA60VA.TH / SUZ-KA60VA.TH SUZ-KA60VA.TH 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

46 PERFORMANCE DATA COOLIN operation Rated frequency 6Hz SEZ-KA7VA.TH / SUZ-KA7VA.TH SUZ-KA7VA.TH CAPACITY : 7.(kW) INPUT : 60(W) SHF : 0.74 OUTDOOR D.B.(;) INDOOR INDOOR 5 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 46

47 PERFORMANCE DATA COOLIN operation Rated frequency 6Hz SEZ-KA7VA.TH / SUZ-KA7VA.TH SUZ-KA7VA.TH CAPACITY : 7.(kW) INPUT : 60(W) SHF : 0.74 OUTDOOR D.B.(;) INDOOR D.B.(;) INDOOR 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 47

48 PERFORMANCE DATA HEATIN operation SLZ-KA5VA(L).TH / SUZ-KA5VA(H).TH CAPACITY : 3.0(kW) INPUT : 8(W) INDOOR -5-0 D.B.(;) Q INPUT Q INPUT Q INPUT Rated frequency 77Hz OUTDOOR W.B.(;) 0 5 Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT SLZ-KA35VA(L).TH / SUZ-KA35VA(H).TH Rated frequency 77Hz 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).TH / SUZ-KA50VA.TH SUZ-KA50VA.TH Rated frequency 65Hz CAPACITY : 5.0(kW) INPUT : 550(W) OUTDOOR W.B.(;) INDOOR D.B.(;) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

49 SEZ-KC5VA.W / SUZ-KA5VA(H).TH Rated frequency 77Hz 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.TH / SUZ-KA35VA(H).TH Rated frequency 77Hz 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.TH / SUZ-KA50VA.TH SUZ-KA50VA.TH Rated frequency 80Hz CAPACITY : 5.9(kW) INPUT : 840(W) OUTDOOR W.B.(;) INDOOR D.B.(;) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT SEZ-KA60VA.TH / SUZ-KA60VA.TH SUZ-KA60VA.TH Rated frequency 96Hz CAPACITY : 6.9(kW) INPUT : 50(W) OUTDOOR W.B.(;) INDOOR D.B.(;) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q Q INPUT INPUT SEZ-KA7VA.TH / SUZ-KA7VA.TH SUZ-KA7VA.TH Rated frequency 6Hz CAPACITY : 8.(kW) INPUT : 360(W) OUTDOOR W.B.(;) INDOOR D.B.(;) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

50 0 ACTUATOR CONTROL SUZ-KA5VA(H).TH SUZ-KA35VA(H).TH SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH 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-. R.V. coil control Heating ON Cooling OFF Dry OFF NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor. <COOL> <HEAT> 5 seconds 5 seconds ON Compressor OFF R.V.coil ON OFF ON or OFF ON or OFF Outdoor fan motor ON OFF 0-3. Relation between main sensor and actuator SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH Sensor Discharge temperature thermistor Purpose Protection Indoor pipe temperature thermistor Cooling : Coil frost prevention Heating : High pressure protection Defrost thermistor Cooling : High pressure protection Heating : Defrosting Fin temperature thermistor Protection Cooling : Low ambient temperature operation Ambient temperature thermistor Heating:Defrosting(Heater) Compressor LEV Actuator Outdoor fan motor RV-coil Indoor fan motor Defrost heater SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH Sensor Discharge temperature thermistor Purpose Protection Compressor Actuator Outdoor LEV fan motor 4-way valve Indoor pipe temperature thermistor Cooling : Coil frost prevention Heating : High pressure protection Defrost thermistor Heating : Defrosting Fin temperature thermistor Protection Ambient temperature thermistor Protection Outdoor heat exchanger temperature Cooling : High pressure protection 50

51 SERVICE FUNCTIONS SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH 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 -6-.) JS Jumper wire soldered (Initial setting) none (cut) SUZ-KA5VA.TH 5: 8: Defrost finish temperature SUZ-KA5VAH.TH SUZ-KA35VA.TH 8: 0: 5: 3: SUZ-KA35VAH.TH 3: 0: 5: 3: Serial. ~67P003 68P0033~ TROUBLESHOOTIN SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH -. Cautions on troubleshooting. Before troubleshooting, check the following: ) Check the power supply voltage. ) Check the indoor/outdoor connecting wire for mis-wiring.. 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. ) 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 to 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. ) 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 -. and -3. 5

52 -. 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. 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. 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. W 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. W 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 W. 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 --4.) The indoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point. Make sure to check at least two consecutive blinking cycles. W The outdoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point(-.3.). Make sure to check at least two consecutive blinking cycles. W3 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. Press RESET button of the remote controller. OPERATION INDICATOR lamp Repair the defective parts. te.make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly..if the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized. W. 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..5 sec. st nd 3 rd n th st nd On 0.5 sec. On 0.5 sec. On 0.5 sec. On 0.5 sec. Number of blinks/beeps in pattern indicates the check code in the next page (i.e., n=5 for P5 ) Off Approx..5 sec. On 0.5 sec. On 0.5 sec. Repeated Number of blinks/beeps in pattern indicates the check code in the next page W3.Blinking pattern when the outdoor unit is abnormal:[output pattern B] Beeper sounds OPERATION INDICATOR lamp blink pattern Beep Beep Beep Beep Beep Beep Beep Off Self-check Approx..5 sec. starts (Start signal received) On Approx. 3 sec. st nd 3 rd n th st nd On 0.5 sec. On On 0.5 sec. 0.5 sec. On 0.5 sec. Number of blinks/beeps in pattern indicates the check code in the next page (i.e., n=5 for U ) Off Approx..5 sec. On Approx. 3 sec. On 0.5 sec. On 0.5 sec. Repeated Number of blinks/beeps in pattern indicates the check code in the next page 5

53 --. 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. 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-MAA CLOCK OPERATION CLEAR A --3. 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 P P P9 E6,E7 P4 P5 P6 EE P8 Beeper sounds/operation INDICATOR Symptom lamp blinks (Number of times) Intake sensor error Pipe (TH) sensor error Pipe (TH5) sensor error 3 Indoor/outdoor unit communication error 4 Drain sensor error 5 Drain pump error 6 Freezing/Overheating protection operation 7 Communication error between indoor and outdoor units 8 Pipe temperature error E4, E5 9 Remote controller signal receiving error 0 Fb Indoor unit control system error (memory error, etc.) E0, E3 Remote controller transmission error E, E Remote controller control board error [Output pattern B] Wired remote controller Check code E9 UP U3,U4 UF U U,Ud U5 U8 U6 U7 U9,UH Others Errors detected by unit other than indoor unit (outdoor unit, etc.) Wireless remote controller 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/49c worked/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 * 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 ( sec.) 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. Remark Remark For details, check the LED display of the outdoor controller board. 53

54 --4. Outdoor unit failure mode table SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH LED indication Abnormal point (Outdoor unit) (Failure mode) -time flash every Outdoor thermistors.5 seconds -time flash.5 seconds OFF 3-time flash.5 seconds OFF 4-time flash.5 seconds OFF 5-time flash Outdoor control.5 seconds OFF system Details of abnormal Detection method Check point Discharge temperature Defrost thermistor Ambient temperature thermistor Fin temperature thermistor P.C. board temperature thermistor nvolatile memory data When thermistors short or open during compressor running. When nonvolatile memory data cannot be read properly, unit stops. Check the outdoor thermistors wdefective 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..5 seconds OFF board temperature overheat Fin temperature/ P.C. board temperature overheat protection When fin temperature exceeds 83 : (SUZ-KA5VA(H))/ 8:(SUZ-KA35VA(H)), or P.C. board temperature exceeds 85 : (SUZ-KA5VA(H))/ 8:(SUZ-KA35VA(H)). Check around outdoor unit. Check outdoor unit air passage. Check the outdoor fan motor. 8-time flash Converter control.5 seconds OFF system 9-time flash.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.5 seconds OFF Overcurrent protection Compressor open-phase protection When 4A(SUZ-KA5VA(H))/ A(SUZ- KA35VA(H)) current flow into 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. Reconnect compressor connector. Check the inverter/compressor. -time flash.5 seconds OFF -time flash.5 seconds OFF Lighting Overcurrent protection Refrigerant system High pressure protection Low discharge temperature Overcurrent protection Compressor synchronous abnormality ( Compressor start-up failure protection) Discharge temperature overheat protection High pressure protection (Overheat protection) Low discharge temperature protection When 4A(SUZ-KA5VA(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 themistor(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 (w) 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. w Operation indicator lamp of the indoor unit (only the wireless remote controller use model) blinks twice. Refer to --. w3 and --3.[Outdoor pattern B]. 54

55 SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH Outdoor LED indication Abnormal point LED LED (Failure mode) Lighting Once Outdoor thermistors Twice 3 times Details of abnormal Detecting method Check point Discharge temperature thermistor Defrost thermistor Ambient temperature thermistor Fin 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. 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. When a short or open circuit is detected in the thermistor during operation. Check the outdoor thermistors. 4 times 9 times 5 times 6 times Outdoor control system EEPROM Converter control system P.C. board temperature thermistor Outdoor heat exchanger temperature thermistor Communication error between P.C. boards 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. When nonvolatile memory data cannot be read properly, unit stops. When the communication between boards protection stop is continuously performed twice. Replace the outdoor electronic control P.C. board. Check the outdoor thermistors. Replace the outdoor electronic control P.C. board. Check the connecting wire between outdoor electronic control P.C. board and power board. 5 times 7 times oes out Communication between P.C. boards protection Current sensor Current sensor protection Zero cross detecting circuit Communication error occurs between the electronic control P.C.board and power board for more than 0 seconds. Current sensor protection stop is continuously performed twice. When a short or open circuit is detected in the current sensor during compressor operating. The protection stop of the zero cross detecting circuit is continuously performed 0 times. Replace the power board. Check the connecting wire among electronic control P.C. board, noise filter P.C. board and power board. Zero cross detecting circuit protection Converter protection Bus-bar voltage protection () When zero cross signal cannot be detected while the compressor is operating. When a failure is detected in the operation of the converter during operation. When the bus-bar voltage exceeds 400V or falls to 0V or below during compressor operating. Replace the power board. 6 times oes out Bus-bar voltage protection () When the bus-bar voltage exceeds weven if this protection stop is 400V or falls to 50V or below during performed continuously 3 compressor operating. times, it does not mean the abnormality in outdoor power system. 55

56 Outdoor LED indication Abnormal point LED LED (Failure mode) Once oes out Overcurrent protection Details of abnormal Detecting method Check point IPM protection Lock protection When overcurrent is detected after Check the connection of the compressor seconds of compressor start-up. connecting wire. When overcurrent is detected within Check the inverter/ compressor. seconds after the compressor gets started. Check the stop valve. 3 times oes out Fin temperature/p.c. board temperature overheat Fin temperature overheat protection When the fin temperature exceeds 87: during operation. Check around outdoor unit. Check outdoor unit air passage. Check the outdoor fan motor. 4 times oes out P.C.boad temperature overheat protection When the P.C. board temperature exceeds 70: during operation. 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. 56

57 -3. Troubleshooting check table SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH NOTE. The location of LED is illustrated at the right figure. Refer to LED lights up during normal operation. Inverter P.C. board (Parts side) Flashing LED. Symptom LED indication Abnormal point/ Condition Detection method Check point Outdoor unit does not operate -time flash every.5 seconds Outdoor power system When it consecutively occurs 3times that the compressor stops for overcurrent protection or start-up failure protection within minute start-up. Check stop valve. Reconnect connector of compressor. Refer to -5.A "How to check inverter/ compressor". 3 Outdoor thermistors Outdoor control system 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. Refer to -5. "Check of outdoor thermistors". Replace inverter P.C. board time flash.5 seconds OFF 4-time flash.5 seconds OFF Serial signal Outdoor unit (Other abnormality) When the communication failure between the indoor and outdoor unit for 3 minutes. When outdoor unit is defective. Refer to -5.O "How to check miswiring and serial signal error. Refer to --3. Check [output pattern B] 6 7 'Outdoor unit stops and restarts 3 minutes later' is repeated -time flash.5 seconds OFF 3-time flash.5 seconds OFF Overcurrent protection Discharge temperature overheat protection When 4A(SUZ-KA5VA(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. Check stop valve. Reconnect connector of compressor. Refer to -5.A "How to check inverter/compressor". Check refrigerant circuit and refrigerant amount. Refer to -5.L "Check of LEV". 8 4-time flash.5 seconds OFF Fin temperature /P.C. board temperature thermistor overheat protection When temperature of fin temperature thermistor on the heat sink exceeds 83:(SUZ-KA5VA(H))/ 8:(SUZ-KA35VA(H)) or temperature of P.C. board temperature thermistor exceeds 85:(SUZ-KA5VA(H))/ 8:(SUZ-KA35VA(H)), compressor stops and restarts 3 minutes later. Check around outdoor unit. Check outdoor unit air passage. Refer to -5.I "Check of outdoor fan motor". 9 5-time flash.5 seconds OFF High pressure protection When indoor coil thermistor exceeds 70: in HEAT mode. When the defrost thermistor exceeds 70: in COOL mode. Check refrigerant circuit and refrigerant amount. Check stop valve. 0 8-time flash.5 seconds OFF Compressor synchronous abnormality When the waveform of compressor current is distorted. Reconnect connector of compressor. Refer to -5.A "How to check inverter/compressor". 3 0-time flash.5 seconds OFF -time flash.5 seconds OFF 3-time flash.5 seconds OFF Outdoor fan Each phase current of compressor 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 Refer to -5.I "Check of outdoor fan motor. Refer to -5.N "Check of inverter P.C. board. Refer to -5.A "How to check inverter/compressor". DC voltage When DC voltage of inverter cannot be detected normally. Refer to -5.A "How to check inverter/compressor" Outdoor unit operates Outdoor unit operates -time flash.5 seconds OFF 3-time flash.5 seconds OFF 4-time flash.5 seconds OFF 7-time flash.5 seconds OFF 8-time flash.5 seconds OFF 9-time flash.5 seconds OFF 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 current from power outlet exceeds 6.A(SUZ- KA5VA(H))/ 9.A(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 : TR8) 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. 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 -5.L "Check of LEV". Refer to -5. "Check of outdoor thermistors". The flashing frequency shows the number of times the LED blinks after every.5-second OFF. (Example) When the flashing frequency is. 0.5-second ON 0.5-second ON Refer to -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) When the power supply voltage is high. Check if the connector of the compressor is correctly connected. Refer to -5.A "How to check inverter/ compressor". ON OFF.5-second OFF 57.5-second OFF

58 SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH. Symptom Outdoor unit does not operate. Indication LED(Red) LED(Yellow) Abnormal point / Condition Lightning Twice Outdoor power system Condition When IPM protection stop or lock protection stop is continuously performed three times within minute after the compressor gets started, or when converter protection stop or bus-bar voltage protection stop is continuously performed three times within 3 minutes after start-up. Correspondence Check the connection of the compressor connecting wire. Refer to -5.U "How to check inverter/compressor". Check the stop valve. 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 -5.V "Check of outdoor thirmistor". 3 Lightning 4 times Fin temperature thermistor P.C board temperature thermistor Ambient temperature thermistor When a short or open circuit is detected in the thermistor during operation. When a short or open circuit is detected in the thermistor during operation. Refer to -5.V "Check of outdoor thirmistor". Replace the outdoor electronic control P.C. board. 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 -5.V "Check of outdoor thirmistor". 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 Lightning 6 times Serial signal When the communication fails between the indoor and outdoor unit for 3 minutes. Refer to -5.R "How to check mis-wiring and serial signal error Lightning 7 times nvolatile memory data When the nonvolatile memory data cannot be read properly. 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 Lightning times times Communication error between P.C. boards Zero cross detecting circuit 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. 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. 0 'Outdoor unit stops and restarts 3 minutes later' is repeated. Twice oes out IPM protection Lock protection When over-current is detected after minutes of compressor start-up. When over-current is detected within minutes of compressor start-up Reconnect compressor connector. Refer to -5.U "How to check inverter/compressor". Check the stop valve. Check the power module (PAM module) times oes out 4 times oes out 5 times oes out 8 times oes out 9 times oes out Discharge temperature protection Fin temperature protection P.C. board temperature protection High-pressure protection Converter protection Bus-bar voltage protection () Bus-bar voltage protection () When temperature of discharge temperature thermistor exceeds 6:, compressor stops. Compressor can restart if discharge temperature thermistor reads 00: or less 3 minutes later. 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. When the outdoor heat exchanger temperature exceeds 70: during cooling or when indoor gas pipe temperature exceeds 70: during heating. When a failure is detected in the operation of the converter during operation. When the bus-bar voltage exceeds 400V or falls to 0V or below during compressor operating. When the bus-bar voltage exceeds 400V or falls to 50V or below during compressor operating. Check the amount of gas and refrigerant circuit. Refer to -5.T "Check of LEV". Check refrigerant circuit and refrigerant amount. Refer to -5.T "Check of LEV". Check around of gas and the refrigerant circuit. Check of stop valve. Replace the power board. Replace the power board. 3 times oes out Outdoor fan motor When failure occurs continuously three times within seconds after the fan gets started. Refer to -5.W "Check of outdoor fan motor". Lighting 8 times Current sensor When a short or open circuit is detected in the current sensor during protection compressor operating. Replace the power board. Lighting times Communication between P.C. Communication error occurs between the outdoor electronic control P.C. Check the connecting wire between outdoor electronic control boards protection board and power board for more than 0 seconds. P.C. board and power board. Lighting times Zero cross detecting circuit When zero cross signal cannot be detected while the compressor is Check the connecting wire among outdoor electronic control protection operating. P.C. board, noise filter P.C. board and power board. NOTE. The location of LED is illustrated at the right figure.. LED is lighted during normal operation. The flashing frequency shows the number of times the LED blinks after every.5-second OFF. (Example) When the flashing frequency is. 0.5-second ON Outdoor electronic control P.C. board(parts side) LED LED Lighting 0.5-second ON ON OFF.5-second OFF.5-second OFF 58

59 . Symptom Outdoor unit operates. Indication LED(Red) LED(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 -5.T "Check of LEV". Refer to -5.V "Check of outdoor thermistors". 3 4 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 -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. 5 Outdoor unit operates 9 times Lighting Inverter check mode When the unit is operated with emergency operation switch. - Lighting Lighting rmal

60 -4. Trouble criterion of main parts () SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH Part name Defrost thermistor (RT6) Ambient temperature thermistor(rt65) Discharge temperature thermistor(rt6) Fin temperature thermistor(rt64) Compressor(MC) Outdoor fan motor(mf) R.V. coil(s4) Check method and criterion Measure the resistance with a tester. (Part temperature 0 C ~ 40 C) rmal 5 k" ~ 55 k" Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up. (Part temperature 0 C ~ 40 C) rmal 50 k" ~ 600 k" rmal k" ~ 80 k" Measure the resistance between the terminals with a tester. (Part temperature C ~ 40 C) Color of the lead wire WHT BLK BLK RED RED WHT rmal 3 " ~ 4 " 3 " ~ 4 " 3 " ~ 4 " Measure the resistance between the terminals with a tester. (Part temperature C ~ 40 C) rmal. k" ~.55 k" Abnormal Open or short-circuit Abnormal Open or short-circuit Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up. (Part temperature 0 C ~ 40 C) Abnormal Open or short-circuit Measure the resistance between the terminals with a tester. (Part temperature C ~ 40 C) U-V U-W V-W SUZ-KA5VA SUZ-KA5VAH. " ~.66 " rmal SUZ-KA35VA SUZ-KA35VAH 0.4 " ~ " Abnormal Open or short-circuit Abnormal Open or short-circuit Abnormal Open or short-circuit Figure WHT RED BLK 3 W V U WHT RED BLK 3 W V U LEV(Expansion valve coil) Measure the resistance with a tester. (Part temperature : C ~ 40 C) Color of the lead wire rmal WHT RED RED ORN 38 " ~ 50 " YLW BRN BRN BLU Abnormal Open or short-circuit WHT6 RED ORN4 LEV YLW5 BRN BLU3 Defrost heater(h) Measure the resistance with a tester. (Part temperature - C ~ 40 C) rmal 333 " ~ 4 " Abnormal Open or short-circuit 60

61 -4. Trouble criterion of main parts () SUZ-KA50VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA7VA.TH Part name Defrost thermistor (RT6) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) Discharge temperature thermistor (RT6) Measure the resistance with a tester. (Part temperature : -0 C ~ 40 C) rmal 5kΩ ~ 55kΩ rmal 00kΩ ~ 50kΩ Check method and criterion Abnormal Open or short-circuit Measure the resistance with a tester, after warming up the thermistor by holding by hand. (Part temperature : C ~ 40 C) Abnormal Opened or short-circuit Fin temperature thermistor (RT64) Compressor (MC) V WHT W RED U BLK Outdoor fan motor (MF) Measure the resistance with a tester. (Part temperature : 0 C ~ 40 C) rmal 5kΩ ~ 00kΩ Measure the resistance between terminals with a tester. (Winding temperature : -0 C ~ 40 C) rmal SUZ-KA50/60VA().TH SUZ-KA7VA().TH 0.40Ω ~ Ω.Ω ~.49Ω Measure the resistance between lead wires with a tester. (Part temperature : -0 C ~ 40 C) Abnormal Open or short-circuit abnormal Open or short-circuit RED U (W) WHT V (V) BLK W (U) Color of lead wire RED - BLK BLK - WHT WHT - RED rmal 3.4Ω ~ 6.4Ω Abnormal Open or short-circuit (t including WHT - ORN) Measure the resistance with a tester. (Part temperature : -0 C ~ 40 C) R. V. coil (S4) rmal.6kω ~ 3.3kΩ Abnormal Open or short-circuit Expansion valve (LEV) WHT RED LEV ORN YLW BRN BLU Measure the resistance with a tester.(part temperature : -0 C ~ 40 C) Color of lead wire WHT - RED RED - ORN YLW - BRN BRN - BLU rmal 37.4Ω ~ 53.9Ω Abnormal Open or short-circuit High pressure switch (HPS) SUZ-KA7VA.TH SUZ-KA7VA.TH HPS Pressure rmal abnormal Operation OFF Other than Short 3.7 ± 0.5MPa those listed at left MPa Open 0. 6

62 [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH] -5. Troubleshooting flow Outdoor unit does not operate. 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 for SLZ/SUZ and for SEZ/SUZ.) <<Measurement point>> w Measure AC voltage between the lead wires at 3 points. BLK (U)-WHT (V) BLK (U)-RED (W) WHT(V)-RED (W) NOTE. Output voltage varies according to power supply voltage.. 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.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 ") 6

63 [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.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 ["] Abnormal [short] Infinite["] Abnormal [open] NOTE. Be sure to zero the ohmmeter before measurement.. Winding resistance for each phase at :. Refer to 4. SPECIFICATION. Ohmmeter indication " " " X X X rmal (~several ") Abnormal (0" short) Abnormal (infinite open) WHT 3 V RED BLK W U Compressor motor 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>> [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 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 0~0 seconds Abnormal (compressor short or poor contact) (compressor lock-out) 0 seconds~5 minutes Abnormal (refrigerant circuit defect) more than 5 minutes rmal 0 second 0 seconds 5 min. Outdoor fan starts Abnormal (Compressor winding short or layer short) (compressor connector poor contact) (compressor lock-out) Abnormal (Refrigerant circuit defect, etc.) rmal 63

64 The thermistors in the outdoor unit are abnormal. [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH] Check of outdoor thermistors Defrost thermistor RT6 Measure the resistance between CN64 and. Disconnect the connectors CN64, CN64 and CN643 from the inverter P.C. board. (Check the characteristics of each thermistor.) Discharge temperature thermistor RT6 Measure the resistance between CN64 3 and 4. Fin temperature thermistor RT64 Measure the resistance between CN64 and. Ambient temperature thermistor RT65 Measure the resistance between CN643 and. Is the resistance of thermistor normal? (Refer to -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, CN64 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 w First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to -4.. w In case CN7 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 CN7 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 V AC between CN7 and 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. CN7 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 V AC between CN7 and 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. 64

65 [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH] Outdoor fan motor does not operate. I Check of outdoor fan motor Is the resistance between each terminal of outdoor fan motor normal? (Refer to -4.) Disconnect CN9 from the inverter P.C. board. 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 (+) and 5(-) Between 3(+) and 5(-) Inverter P.C. board (Solder side) CN93 CN9 ( Fixed to either 5V or 0V DC) Does the voltage between each terminal repeat 5V and 0V DC by turns? Does the outdoor fan rotate smoothly? Replace the outdoor fan motor. Check the inverter P.C. board. (Refer to -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 S S Does POWER lamp on the indoor unit light up? Is there voltage V AC between the indoor terminal block S and S? Replace the indoor electronic control P.C. board. Is there voltage 0V ~ 370V DC between DB6 (+) and DB6 ( ) on the inverter P.C. board? Refer to -6.. Check the electric parts in main circuit. Dose LED on the inverter P.C. board light up or flash? Refer to -6-. Ok. If flash, refer to -3. Replace the inverter P.C. board. DB6 0V~370V DC Inverter P.C. board (Solder side) 65

66 [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH] Outdoor unit does not operate at all or stops immediately due to over current. K Check of current limiting resistor 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. 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. W 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 -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(+).Pin4(-) Pin(+) 3.Pin5(-) Pin(+) 4.Pin6(-) Pin(+) Is there about 3~5V AC between each? NOTE: Measure the voltage by an analog tester. TOO COOL W. 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.. Press the RESET button on the remote controller. Replace the inverter P.C. board. Replace the expansion valve. 66

67 [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH] L 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 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-KA5VAH SUZ-KA35VAH> Check the following points before checking electric continuity. ) Does the resistance of ambient temperature thermistor have the characteristics? Refer to -6-. ) Is the resistance of defrost heater normal? Refer to -4. 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... 3 CN7 Is there V AC between CN7 and 3 on the power P.C. board? Refer to -6-. Is the voltage between CN7 (+)-3(-) on the power P.C. board 0V DC? Refer to -6-. Replace the inverter P.C. board. problem of the power P.C. board. Replace the power P.C. board. 3 CN7 H H V AC 67

68 [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.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 to-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? Check the corresponding parts following LED indication. (Refer to -3.) (0-time blink) Replace the inverter P.C. board. 68

69 [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH] O How to check mis-wiring 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 S? 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 mis-wiring, 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 S and S3. W Turn ON the power supply. W. 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. W 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 invertercontrolled 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"? W 3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S? <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. W W Be careful to 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. 69

70 [SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH] O How to check mis-wiring 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 S? 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 miswiring, 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 S and S3. W Turn ON the power supply. W. 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. W 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 invertercontrolled 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"? W 3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S? <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. W W Be careful to 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. 70

71 [SUZ-KA5/35VA(H).TH SUZ-KA50/60/7VA().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 3m? 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 3m? 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 followings before asking for service..devices affected by the electromagnetic noise TV sets, radios (FM/AM broadcast, shortwave).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. )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. 7

72 Outdoor unit does not operate. (LED display: display OFF) Q Check of power supply [SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH] Start Check the connecting of parts of main power supply circuit. Turn on power supply. Is there voltage of V AC in the power supply terminal block? Check the power supply cable. Is the output voltage from the noise filter P.C. board V AC? Is fuse (F64) blown? Replace the noise filter P.C. board. Replace the fuse. Is the input voltage to the power board V AC? Replace the reactor. Is the input voltage to the outdoor electronic control P.C. board 5V DC? Replace the power board. Replace the outdoor electronic control P.C. board. 7

73 [SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().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 mis-wiring 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 S? 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 mis-wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Make them correct. A Outdoor electronic control P.C. board (Parts side) LED 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 S and S3. W Turn ON the power supply. W. 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. W 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 Reinstall the unit apart from invertercontrolled 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"? W 3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S? <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. W W Be careful to 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. 73

74 [SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH] When unit cannot operate neither by the remote controller. Indoor unit does not operate. Outdoor unit does not operate. R How to check mis-wiring 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 S? 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 miswiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Make them sure. A Outdoor electronic control P.C. board (Parts side) LED 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 S and S3. W Turn ON the power supply. W. 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. W 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 Reinstall the unit apart from invertercontrolled 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"? W 3 Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S and S3. Turn ON the power supply. Is there amplitude of 0 to V DC between outdoor terminal block S and S3? <Confirmation of serial signal> Is there rated voltage between indoor terminal block S and S? <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 OFF) Replace the inverter P.C. board or the outdoor electronic control P.C.board. W W Be careful to 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. 74

75 S Check of R.V. coil [SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH] The cooling operation or heating operation does not operate. (LED display: Both LED and LED lighting) When heating operation does not work.. Disconnect the lead wire leading to the compressor.. 3 minutes after turning on the power supply, start EMERENCY OPERATION in HEAT mode. Is there voltage of V AC between pin and pin at connector CN9? W 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.. 3 minutes after turning on the power supply, start EMERENCY OPERATION in HEAT mode. Disconnect the connector CN9 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 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.. 3 minutes after turning on the power supply, start EMERENCY OPERATION in COOL mode. W If the connector CN9 is not connected or R.V. coil is open, voltage occurs between terminals even when the control is OFF. Is there voltage of V AC between pin and pin at connector CN9? W 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.. 3 minutes after turning on the power supply, start EMERENCY OPERATION in COOL mode. Is there voltage 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. 75

76 When cooling, heat exchanger of non-operating indoor unit frosts. When heating, non-operating indoor unit get warm. [SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH] T Check of LEV LED display: LED LED 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 LED 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? W 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 50V (48Hz) HEAT 70V (64Hz) Is the input voltage to the outdoor electronic control P.C. board 370V 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 76

77 When thermistor is abnormal. [SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().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 RT6 RT68 RT64 RT65 Connector, Pin. Between CN66 pin and pin 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 pin on the outdoor power board Between CN663 pin and pin 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 (+) and 5(-) Between 3(+) and 5(-) (Fixed to either 5V or 0V DC) Replace the outdoor DC fan motor. Does the voltage between each terminal become 5V DC and 0V DC repeatedly? Does the outdoor fan motor rotates smoothly? Replace the outdoor electronic control P.C. board. 77

78 [SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH] When the operation frequency does not go up from lowest frequency. X Check of HPS SUZ-KA7VA.TH. Disconnect the connector CN68 in the electronic control P.C. board.. 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. 78

79 -6. Test point diagram and voltage -6-. Inverter P.C. board SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH Back side of unit DB6 0V ~ 370V DC (+) (-) 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) (+) (+) 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 (CN75) LEV connector (CN7) Discharge temperature thermistor/rt6 (CN64) Defrost thermistor/rt6 (CN64) Fin temperature thermistor/rt64 (CN64) Ambient temperature thermistor /RT65 (CN643) 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(:) 79 Resistance(k") Discharge temperature thermistor(rt6) Temperature(:)

80 -6-. Power P.C. board SUZ-KA5VA.TH SUZ-KA35VA.TH SUZ-KA5VAH.TH SUZ-KA35VAH.TH Back side of unit Varistor (NR63) Varistor (NR6) Varistor (NR64) Front side of unit V AC R.V. coil (CN7) V AC Connecting wire with inverter P.C.board (CN7) Refer to -5.M V AC Heater connector (CN7) Refer to -5.M } SUZ-KA5VAH SUZ-KA35VAH 80

81 OC3C--3qxp :44 PM Page Outdoor electronic control P.C. board SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH Defrost thermistor (RT6) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) Discharge temperature thermistor (RT6) Resistance (k') Temperature (;) LEV CN795 V DC pulse wave ( ( ( (+) ( ( ) CN78 (+) V R.V. coil ( ) DC Rush current relay ( ) ND (power board) ( ( ( ( ( CN93 ND 5V 5V DC pulse wave CN9-90V AC 5V 5V CN70 ( ) Signal reception (From power board) ND To fan motor ( 5V DC pulse wave (+) CN70 Signal transmission (+) (To power board) ( ) 5V DC pulse wave CN663 Ambient temperature thermistor (RT65) Temperature (;) CN66 Outdoor heat exchanger temperature thermistor (RT68) ( 00 Fin temperature thermistor (RT64) 0 80 Resistance (k') 0 Discharge temperature thermistor (RT6) ( Defrost thermistor (RT6) ( Resistance (k') Temperature (;) LED LED CN80 5V DC ~ 370V DC Input F80 FUSE 3.5A/50V ( SUZ-KA7VA.TH CN68 High pressure switch 8 V AC 50 Hz Input ( CN60 Serial signal Room A 5~0V DC (

82 -6-4. ise filter P.C. board SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH CN90 To electronic control P.C. board CN90 To power board CN903 To power board { { V AC 50Hz Input CN9 R.V. coil V AC { V AC 50Hz Output { V AC 50Hz Output NR64 VARISTOR F64 FUSE A/50V F9 FUSE A/50V 8

83 -6-5. Outdoor power board SUZ-KA50VA().TH SUZ-KA60VA().TH SUZ-KA7VA().TH Connect to the compressor Voltage among phases: 5V to 80V 5-370V DC Output (Red) (+) ( ) 3 (White) Connect to the earth CN Connect to the controller board (+)-5( ): Signal transmission (To electronic control P.C. board) 5V DC pulse wave (+)-5( ): Zero cross signal 3-4 : t used (+)6-5( ): 5V (+)7-5( ): 5V CN3 Fin temperature thermistor RT64 Signal reception (From electronic control P.C. board) 5V 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 CN Connect to the controller board (+)-5( ): Signal transmission (To electronic control P.C. board) 5V DC pulse wave (+)-5( ): Zero cross signal 3-4 : t used (+)6-5( ): 5V (+)7-5( ): 5V CN3 Fin temperature thermistor RT64 Signal reception (From electronic control P.C. board) 5V DC pulse wave ) CN5 Primary current detection (Connect to the noise filter) 83

84 3 DISASSEMBLY INSTRUCTIONS <"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 ()) 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. () The terminal with this connector has the locking mechanism. Sleeve Locking lever Slide the sleeve. Pull the terminal while pushing the locking lever. Connector Hold the sleeve, and pull out the terminal slowly. SUZ-KA5VA.TH SUZ-KA5VAH.TH OUTDOOR UNIT SUZ-KA35VA.TH SUZ-KA35VAH.TH OPERATIN PROCEDURE. Removing the cabinet. () Remove the screw fixing the service panel. (See Photo.) () Pull down the service panel and remove it. (See Photo.) (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 Back panel Screw of the service panel Direction to remove Screws of the cabinet Service panel Hooks Screws of the cabinet 84

85 OPERATIN PROCEDURE. Removing the inverter assembly, inverter P.C. board and power P.C. board () Remove the top panel, cabinet and service panel. (Refer to.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) (3) Disconnect the ground wires(see Photo 3.), the lead wire to the reactor and the following connectors; <Power P.C. board> CN7 (4-way valve) CN7 (Defrost heater) SUZ-KA5/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.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) (3) Remove the inverter assembly. (Refer to.) (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.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) (3) Remove the inverter assembly. (Refer to.) (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 85

86 OPERATIN PROCEDURE PHOTOS 5. Removing outdoor fan motor () Remove the top panel, cabinet and service panel. (Refer to.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) (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 6. Removing the compressor and 4-way valve () Remove the top panel, cabinet and service panel. (Refer to.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) (3) Remove the inverter assembly. (Refer to.) (4) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm (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 Propeller Photo 8 Welded parts of 4-way valve 86

87 SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH SUZ-KA50VA.TH SUZ-KA60VA.TH SUZ-KA7VA.TH OUTDOOR UNIT OPERATIN PROCEDURE. Removing the cabinet () Remove the screws of the service panel. () 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. Photo Screws of the cabinet PHOTOS Screw of the top panel Photo 3 Screw of the motor support Photo 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 87

88 OPERATIN PROCEDURE. Removing the inverter assembly, inverter P.C. board and power board () Remove the top panel, cabinet and service panel. (Refer to.) () Remove the back panel.(refer to.) (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> CN9 (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. () 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. PHOTOS Photo 4 Screws of the power board assembly Screws of the relay panel 3. Removing R.V. coil () Remove the top panel, cabinet and service panel. () Remove the back panel. (Refer to.) (3) Remove the inverter assembly. (Refer to.) (4) Remove the R.V. coil. (Photo 9) 88

89 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.) () Remove the back panel. (Refer to.) (3) Remove the inverter assembly. (Refer to.) (4) Pull out the defrost thermistor from its holder. (Photo 6) (5) Pull out the discharge temperature thermistor from its holder. (Photo 5) (6) Pull out the outdoor heat exchanger temperature thermistor from its holder. (Photo 6) (7) Pull out the ambient temperature thermistor from its holder. (Photo 6) Photo 5 PHOTOS Discharge temperature thermistor Photo 6 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.) () Remove the back panel. (Refer to.) (3) Remove the inverter assembly. (Refer to.) (4) Remove the propeller. (5) Remove the screws fixing the fan motor. (6) Remove the fan motor. Photo 7 Propeller Screws of the outdoor fan motor 89

90 OPERATIN PROCEDURE 6. Removing the compressor and 4-way valve () Remove the top panel, cabinet and service panel. (Refer to.) () Remove the back panel. (Refer to.) (3) Remove the inverter assembly. (Refer to.) (4) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm (0 MPa). (5) Detach the welded part of the suction and the discharge pipe connected with compressor. (Photo 9) (6) Remove the compressor nuts. (7) Remove the compressor. (8) Detach the welded part of 4-way valve and pipe. (Photo 8) Photo 8 PHOTOS Welded parts of 4-way valve Photo 9 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.) () Disconnect the reactor lead wire. (3) Remove the screws of the reactor, and remove the reactor. Photo 0 Screws of the reactor 90

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