SERVICE MANUAL MUCFH-GA35VB - MUCFH-GA50VB - MUCFH-GA60VB - E1. Wireless type Models HFC FLOOR AND CEILING TYPE AIR CONDITIONERS. No.

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1 FLOOR AND CEILING TYPE AIR CONDITIONERS SERVICE MANUAL Wireless type Models E MUCFH-GA35VB - E MUCFH-GA50VB - MUCFH-GA60VB - E HFC utilized R40A. OB38 CONTENTS Indication of model name MUCFH-GA50VB - E. TECHNICAL CHANGES 3 2. PART NAMES AND FUNCTIONS 6 3. SPECIFICATION 7 4. NOISE CRITERIA CURVES 8 5. OUTLINES AND DIMENSIONS 9 6. WIRING DIAGRAM 7. REFRIGERANT SYSTEM DIAGRAM 2 8. PERFORMANCE CURVES 4 9. ACTUATOR CONTROL SERVICE FUNCTIONS 25. TROUBLESHOOTING DISASSEMBLY INSTRUCTIONS PARTS LIST 43 NOTE: This service manual describes technical data of outdoor units. As for indoor units MCFH-GA35VB- E,MCFH-GA50VB- E and MCFH-GA60VB- E refer to the service manual OB380.

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3 TECHNICAL CHANGES MUH-A2YV - E MUCFH-GA35VB -. Indication of capacity has been changed. (BTU base kw) MUCFH-A8WV - E MUCFH-GA50VB -. Indication of capacity has been changed. (BTU base kw) MUCFH-A24WV - E MUCFH-GA60VB -. Indication of capacity has been changed. (BTU base kw) E E E INFORMATION FOR THE AIR CONDITIONER WITH R40A REFRIGERANT This room air conditioner adopts 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 R22 conditioners. As R40A has working pressure approximate.6 times as high as that of R22, some special tools and piping parts/ materials are required. Refer to the table below. 2 Take sufficient care not to allow water and other contaminations to enter the R40A refrigerant during storage and installation, since it is more susceptible to contaminations than R22. 3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R40A. (Refer to 2. Refrigerant piping.) 4 Composition change may occur in R40A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent composition change. Refrigeration Refrigerant oil New refrigerant Refrigerant R40A Composition (Ratio) HFC-32: HFC-25 (50%:50%) Refrigerant handling Pseudo-azeotropic refrigerant Chlorine t included Safety group (ASHRAE) A/A Molecular weight 72.6 Boiling point (:) -5.4 Steam pressure [25:](Mpa).557 Saturated steam density [25:](Kg/K) 64 Combustibility n combustible ODP w 0 GWP w2 730 Refrigerant charge method From liquid phase in cylinder Additional charge on leakage Possible Kind Incompatible oil Color n Smell n w :Ozone Destruction Parameter : based on CFC- w2 :Global Warmth Parameter : based on CO2 Previous refrigerant R22 R22 (00%) Single refrigerant Included A n combustible Gas phase Possible Compatible oil Light yellow n 3

4 Compressor New Specification Current Specification The incompatible refrigeration 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 refrigerating oil are compatible each, refrigeration oil goes back to the compressor through the lower position oil back hole. refrigeration oil of the upper layer to flow back to the compressor. Suction muffler Suction muffler Compressor Oil back hole Refrigeration oil Compressor Oil back hole Refrigerant Refrigeration 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 [Gauge]) =0.2(kgf/f [Gauge]) Conversion chart of refrigerant temperature and pressure (MPa [Gauge]) R40A Saturated liquid pressure R22 NOTE : The unit of pressure has been changed to MPa on the international system of units(si unit system). The conversion factor is: (MPa [Gauge]) =0.2(kgf/f [Gauge]) (:).Tools dedicated for the air conditioner with R40A refrigerant The following tools are required for R40A refrigerant. Some R22 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 20 threads to /2 UNF with 20 threads. R40A tools Can R22 tools be used? Description R40A has high pressures beyond the measurement range of existing Gauge manifold gauges. Port diameters have been changed to prevent any other refrigerant from being charged into the unit. Charge hose Gas 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 9.52 mm 2.7 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 R22 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 2.Refrigerant piping Specifications Use the refrigerant pipes that meet the following specifications. Pipe Outside diameter mm Wall thickness Insulation material For liquid mm 0.8 mm Heat resisting foam plastic For gas mm.0 mm Specific gravity Thickness 8 mm Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm (6.35, 9.52, 2.7),.0 mm (5.88). Never use any pipe with a thickness less than 0.8 mm (6.35, 9.52, 2.7),.0 mm (5.88), as the pressure resistance is insufficient. 2 Flaring work and flare nut Flaring work for R40A pipe differs from that for R22 pipe. For details of flaring work, refer to Installation manual FLARING WORK. Pipe diameter mm Dimension of flare nut R40A R Refrigerant oil Apply the special refrigeration 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 refrigeration 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. Union Stop valve Indoor unit Refrigerant gas cylinder operating valve Liquid pipe Gas pipe Service port Outdoor unit Gauge manifold valve (for R40A) Charge hose (for R40A) Refrigerant gas cylinder for R40A with siphon Refrigerant (liquid) Electronic scale for refrigerant charging 5

6 2 PART NAMES AND FUNCTIONS OUTDOOR UNIT MUCFH-GA35VB - E MUCFH-GA50VB - E Air inlet (back and side) Piping Drain hose Air inlet (back and side) Piping Drain hose Air outlet Air outlet Drain outlet Drain outlet MUCFH-GA60VB - E Air inlet (back and side) Piping Drain hose Air outlet Drain outlet ACCESSORIES Item Drain socket Drain cap [33 Drain cap [6 MUCFH-GA35VB- E 2 Q'ty MUCFH-GA50VB- 2 E MUCFH-GA60VB- 2 E 6

7 3 SPECIFICATION Outdoor model Function Power supply Capacity kw Dehumidification r/h Air flow(high) K /h Power outlet A Running current A Power input W Power factor % Starting current A Compressor motor current A Fan motor current A Coefficient of performance(c.o.p) Model Output W Winding " resistance(at 20:) Model Winding " resistance(at 20:) Dimensions WOHOD mm Weight kg Sound level(high) db Fan speed(high) rpm Fan speed regulator Refrigerant filling kg capacity(r40a) Refrigeration oil (Model) cc Thermistor RT6(at 0:) k" Capacity Electrical data Compressor Fan motor Special remarks MUCFH-GA35VB - E MUCFH-GA50VB - E MUCFH-GA60VB - E Cooling Heating Cooling Heating Single phase 230V, 50Hz Single phase 230V, 50Hz ,094, RN35VHSHT 900 C-R 2.79 C-S 3.36 RA6V33-JB WHT-BLK 25. BLK-RED o540o (NEO22) 33.8 Cooling Heating Single phase 230V, 50Hz , , , RN96VHSHT,300 C-R.80 C-S 3.00 RA6V50-PA WHT-BLK 79.5 BLK-RED o605o (NEO22) 33.8 NOTE: Test conditions are based on ISO 55. Cooling : Indoor DB27 C WB9 C Heating : Indoor DB20 C WB 5.5 C Outdoor DB35 C WB(24 C) Outdoor DB 7 C WB 6 C Indoor-Outdoor piping length : 5m 0.5 2,370 2, , NN29VBAHT,900 C-R 0.80 C-S.64 RA6V85-DA WHT-BLK 68.8 BLK-RED o850o ,200 (NEO22)

8 4 NOISE CRITERIA CURVES MUCFH-GA35VB - E FUNCTION SPL(dB(A)) LINE COOLING 49 HEATING Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:) Heating : Dry-bulb temperature 7: Wet-bulb temperature 6: 90 MUCFH-GA50VB - E FUNCTION COOLING HEATING SPL(dB(A)) Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:) Heating : Dry-bulb temperature 7: Wet-bulb temperature 6: LINE OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-30 NC-20 OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-30 NC-20 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz MUCFH-GA60VB - E FUNCTION COOLING HEATING SPL(dB(A)) Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:) Heating : Dry-bulb temperature 7: Wet-bulb temperature 6: LINE OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-30 NC-20 MICROPHONE OUTDOORUNIT m BAND CENTER FREQUENCIES, Hz 8

9 5 OUTLINES AND DIMENSIONS OUTDOOR UNIT MUCFH-GA35VB - E Air in REQUIRED SPACE 00mm or more 00mm or more 00mm or more Unit: mm Air in Drainage 3 holes [ Air out 25 Service panel 400mm or more 350mm or more Liquid refrigerant pipe joint Refrigerant pipe (flared) [ Gas refrigerant pipe joint Refrigerant pipe (flared) [2.7 MUCFH-GA50VB - E Drainage hole [ Air in 20 REQUIRED SPACE 00mm or more 00mm or more 00mm or more 248 Air in Drainage 3 holes [33 Air out mm or more Service panel 350mm or more Liquid refrigerant pipe joint Refregerant pipe (flared) [ Gas refregerant pipe joint Refregerant pipe (flared) [2.7 9

10 MUCFH-GA60VB - E REQUIRED SPACE 00mm or more Open as a rule 500mm or more if the front and both sides are open Unit: mm 00mm or more 200mm 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) [ Gas refrigerant pipe joint Refrigerant pipe (flared) [5.88 0

11 6 WIRING DIAGRAM MUCFH-GA35VB - E OUTDOOR UNIT MODEL WIRING DIAGRAM TO INDOOR UNIT CONNECTING 2V CIRCUIT BREAKER POWER SUPPLY ~/N 230V 50Hz TB2 3 N TB L PE N GRN/YLW BRN BLU RED BLK BRN DSAR BLU 2 3 2S4 RT6 CN730 F6 CN66 CN72 CN7 WHT SR6 2 BLK 3 RED T6 C65 NR6 SR62 TAB20 52C 4 3 DEICER P.C.BOARD C WHT C RED MC S R BLK MF SYMBOL NAME SYMBOL NAME SYMBOL NAME C COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR T6 TRANSFORMER MF C65 OUTDOOR FAN CAPACITOR (INNER FUSE) TB,TB2 TERMINAL BLOCK DSAR F6 SURGE ABSORBER FUSE(2A) NR6 RT6 VARISTOR DEFROST THERMISTOR 2S4 52C R.V. COIL COMPRESSOR CONTACTOR MC COMPRESSOR(INNER PROTECTOR) SR6,SR62 SOLID STATE RELAY NOTE:. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing. 2. Use copper conductors only. (For field wiring) 3. Symbols below indicate. /: Terminal block, : Connector MUCFH-GA50VB - E OUTDOOR UNIT SYMBOL C C65 DSAR F6 MC POWER SUPPLY ~ /N 230V 50Hz MODEL WIRING DIAGRAM TB2 3 TO INDOOR UNIT N CONNECTING 2V CIRCUIT BREAKER PE TB L N GRN/YLW RED BLK BRN BRN BLU DSAR BLU RT6 2 3 CN730 F6 TAB20 CN66 4 T6 52C NOTES:.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing. 2.Use copper conductors only. (For field wiring) 3.Symbols below indicate. : Terminal block : Connector 2S4 CN72 SR62 NR6 SR6 C65 3 DEICER P.C.BOARD C C WHT RED MC S R BLK RED ORN MF WHT BLK CN7 WHT BLK 2 RED 3 NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER SYMBOL MF NR6 RT6 NAME OUTDOOR FAN MOTOR (INNER PROTECTOR) VARISTOR DEFROST THERMISTOR SYMBOL TB,TB2 2S4 52C NAME TERMINAL BLOCK R.V. COIL COMPRESSOR CONTACTOR FUSE (2A) SR6,SR62 SOLID STATE RELAY COMPRESOR (INNER PROTECTOR) T6 TRANSFORMER

12 MUCFH-GA60VB - E OUTDOOR UNIT MODEL WIRING DIAGRAM CIRCUIT BREAKER TB L POWER SUPPLY ~/N 230V 50Hz TO INDOOR UNIT CONNECTING 2V N TB2 3 N P E GRN/YLW BRN DSAR BLU BLU BRN BLU BRN RT6 3 CN66 X62 X52 DEICER P.C.BOARD 52C 4 SR6 A 52C A2 BLK WHT BLK WHT 2 RED ORN C2 CN7 CN72 X X52 COM SYMBOL NAME C COMPRESSOR CAPACITOR C2 OUTDOOR FAN CAPACITOR DSAR SURGE ABSORBER F6 FUSE (3.5A) MC COMPRESSOR (INNER PROTECTOR) MF OUTDOOR FAN MOTOR (INNER PROTECTOR) NR6 VARISTOR RT6 DEFROST THERMISTOR SR6 SOLID STATE RELAY TB TERMINAL BLOCK TB2 TERMINAL BLOCK T6 TRANSFORMER X52 CONTACTOR X62 R. V. COIL RELAY 2S4 R. V. COIL 52C COMPRESSOR CONTACTOR NOTES:.Use copper conductors only (For field wiring). 2.Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers (3,N). 3.Symbols below indicate. : Terminal block, : Connector NO TAB52 CN730 7 T6 5 NR6 F6 3 WHT MF ORN RED 3 C COM RED NO BLK S C MC R BLU 2S4 RED BLU 7 REFRIGERANT SYSTEM DIAGRAM MUCFH-GA35VB - E OUTDOOR UNIT Refrigerant pipe [2.7 (with heat insulator) 4-way valve Unit:mm Flared connection Stop valve (with service port) Muffler Defrost thermistor RT6 Outdoor heat exchanger Capillary tube [3.0x[.4x500(2pcs) Compressor Capillary tube [3.0x[.6x600 Flared connection Strainer #00 Capillary tube [3.0x[.6x050 R.V. coil heating ON cooling OFF Refrigerant pipe [6.35 (with heat insulator) Stop valve Check valve Refrigerant flow in cooling Refrigerant flow in heating 2

13 MUCFH-GA50VB - E OUTDOOR UNIT Refrigerant pipe [2.7 (with heat insulator) 4- way valve Flared connection Stop valve (with service port) Oil separator #00 Defrost thermistor RT6 Outdoor heat exchanger Capillary tube [2.5o[0.6o,000 Compressor Flared connection Refrigerant pipe[6.35 (with heat insulator) Stop valve Receiver Strainer #00 Capillary tube [3.0o[.6o650 Check valve Capillary tube [3.0o[.6o500 Capillary tube [3.0o[.6o750 (2 pcs) R.V. coil Heating ON Cooling OFF Refrigerant flow in cooling Refrigerant flow in heating MUCFH-GA60VB - E OUTDOOR UNIT Refrigerant pipe [5.88 (with heat insulator) 4- way valve Flared connection Stop valve (with service port) Muffler Muffler #00 Outdoor heat exchanger Compressor Defrost thermistor RT6 Flared connection Capillary tube [3.0X[2.0X400 Receiver Refrigerant pipe [6.35 (with heat insulator) Stop valve Strainer #00 Capillary tube [3.0X[2.0X800 R.V. coil Heating ON Check valve Cooling OFF Refrigerant flow in cooling Refrigerant flow in heating 3

14 MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Model MUCFH-GA35VB - E MUCFH-GA50VB - E MUCFH-GA60VB - E Refrigerant piping MAX. length : m A 25 Gas {2.7 {5.88 Piping size O.D. : mm Liquid {6.35 wit does not matter which unit is higher. W Max. Height difference 0m A: Refrigerant piping Max.length 25m ADDITIONAL REFRIGERANT CHARGE (R40A : g) If pipe length exceeds 7m, additional refrigerant (R40A) charge is required. Models MUCFH-GA35VB - E MUCFH-GA50VB - E MUCFH-GA60VB - E Outdoor unit: precharged,000,850 2,200 Calculation : g = 20g/m (Refrigerant piping length (m)-7) 7m 0 Refrigerant piping length (one way) 0m 5m 20m m PERFORMANCE CURVES MUCFH-GA35VB - E MUCFH-GA50VB - E MUCFH-GA60VB - E The standard data contained in these specifications apply 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. () GUARANTEED VOLTAGE 98~264V, 50Hz (2) AIR FLOW Air flow should be set at MAX. (3) MAIN READINGS COOLING () Indoor intake air wet-bulb temperature : CWB (2) Indoor outlet air wet-bulb temperature : CWB (3) Outdoor intake air dry-bulb temperature : CDB (4) Total input : W HEATING () Indoor intake air dry-bulb temperature : CDB (2) Indoor outlet air dry-bulb temperature : CDB (3) Outdoor intake air wet-bulb temperature : CWB (4) Total input : W Indoor air wet/dry-bulb temperature difference on the left side of the chart on next 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. 4

15 How to measure the indoor air wet-bulb/dry-bulb temperature difference. Attach at least 2 sets of wet and dry-bulb thermometers to the indoor air inlet as shown in the figure, and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high. 2. Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air inlet. Cover the thermometers to prevent direct rays of the sun. 3. Check that the air filter is cleaned. 4. Open windows and doors of the room. 5. Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY 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. Air out INDOOR UNIT Wet and dry-bulb thermometers OUTDOOR UNIT Air in FRONT VIEW Wet and dry-bulb thermometers BACK VIEW MCFH-GA35VB- E MUCFH-GA35VB- E MCFH-GA50VB- E MUCFH-GA50VB- E MCFH-GA60VB- E MUCFH-GA60VB- E MCFH-GA35VB- E MUCFH-GA35VB- E MCFH-GA50VB- E MUCFH-GA50VB- E MCFH-GA60VB- E MUCFH-GA60VB- E OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Both indoor and outdoor units are under the same temperature/humidity condition. Dry Bulb temperature ( C) Relative humidity (%)

16 2 Air flow should be set at MAX. 3 The unit of pressure has been changed to MPa on the international system of units(si unit system). The conversion factor is : (MPa [Gauge]) =0.2(kgf/f [Gauge]) (kgf/f[gauge])(mpa[gauge]) Outdoor low pressure MUCFH-GA35VB- E 230V Outdoor unit current (A) V Ambient temperature( C) Ambient humidity(%) 35(:) (%) Ambient temperature( C) Ambient humidity(%) 35(:) (%) (kgf/f [Gauge])(MPa [Gauge]) 2.2 MUCFH-GA50VB- E Outdoor low pressure V Outdoor unit current (A) V (:) (%) Ambient temperature (:) Ambient humidity (%) (:) (%) Ambient temperature (:) Ambient humidity (%) (kgf/f [Gauge])(MPa [Gauge]). MUCFH-GA60VB- E 2 Outdoor low pressure V Outdoor unit current (A) V (:) (%) Ambient temperature (:) Ambient humidity (%) (:) (%) Ambient temperature (:) Ambient humidity (%) 6

17 HEAT operation Condition Indoor : Dry bulb temerature 20.0: Outdoor : Dry bulb temerature 7,5,20: Wet bulb temerature 4.5: Wet bulb temerature 6,2,4.5: MUCFH-GA35VB- E Outdoor unit current (A) V MUCFH-GA50VB- E Outdoor unit current (A) 230V Ambient temperature( C) Ambient humidity(%) 25(:) (%) (:) (%) Ambient temperature (:) Ambient humidity (%) MUCFH-GA60VB- E 6 Outdoor unit current (A) V (:) (%) Ambient temperature (:) Ambient humidity (%) 7

18 PERFORMANCE DATA COOL operation (230V) MCFH-GA35VB - E : MUCFH-GA35VB - E CAPACITY :3.5(kW) SHF :0.70 INPUT :60(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) 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 8

19 PERFORMANCE DATA COOL operation (230V) MCFH-GA35VB - E : MUCFH-GA35VB - E CAPACITY :3.5(kW) SHF :0.70 INPUT :60(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) 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 9

20 PERFORMANCE DATA COOL operation(230v) MCFH-GA50VB - E : MUCFH-GA50VB - E CAPACITY :4.8(kW) SHF :0.65 INPUT :80(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) 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 20

21 PERFORMANCE DATA COOL operation(230v) MCFH-GA50VB - E : MUCFH-GA50VB - E CAPACITY :4.8(kW) SHF :0.65 INPUT :80(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) 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 2

22 PERFORMANCE DATA COOL operation(230v) MCFH-GA60VB - E : MUCFH-GA60VB - E CAPACITY :6.0(kW) SHF :0.64 INPUT :2450(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) 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 22

23 PERFORMANCE DATA COOL operation(230v) MCFH-GA60VB - E : MUCFH-GA60VB - E CAPACITY :6.0(kW) SHF :0.64 INPUT :2450(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) 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 23

24 PERFORMANCE DATA HEAT operation(230v) MCFH-GA35VB - E : MUCFH-GA35VB - E CAPACITY : 3.7(kW) INPUT : 020(W) OUTDOOR WB(:) INDOOR DB(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT HEAT operation(230v) MCFH-GA50VB - E : MUCFH-GA50VB - E CAPACITY :5.0(kW) INPUT :890(W) HEAT operation(230v) MCFH-GA60VB - E : MUCFH-GA60VB - E OUTDOOR WB(:) INDOOR DB(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT CAPACITY :6.8(kW) INPUT :2720(W) OUTDOOR WB(:) INDOOR DB(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT NOTE Q :Total capacity (kw) INPUT:Total power input (W) DB : Dry-bulb temperature WB : Wet-bulb temperature

25 9 ACTUATOR CONTROL MUCFH-GA35VB - E MUCFH-GA50VB MUCFH-GA60VB - E 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. Example. In case of power ON with remote controller (COOL / DRY) (HEAT) 5 sec. 5 sec. Compressor R.V. coil Outdoor fan ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF 0 SERVICE FUNCTIONS MUCFH-GA35VB - E MUCFH-GA50VB - E MUCFH-GA60VB - E 0-. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JPDS and JPSG (MUCFH-GA35VB/GA50VB) / JPG and R87 (MUCFH-GA60VB) on the outdoor deicer P.C. board, defrosting mode can be accomplished regardless of the defrost interval restriction. Defrost thermistor RT6 must read below -3:. (Refer to -5.) 0-2. CHANGE IN DEFROST SETTING <JRF> When the JRF wire of the deicer P.C. board is cut, the defrost interval time will be changed. <JRG> When the JRG wire of the deicer P.C. board is cut, the defrost temperature will be changed. (Refer to -5.) Model MUCFH-GA35VB- MUCFH-GA50VB- MUCFH-GA60VB- E E E Jumper wire JRF JRG Change point Defrost interval time changes from 40 minutes to 5 minutes. Defrost start temperature changes from -3: to 0:. (MUCFH-GA35VB/GA50VB) Defrost start temperature does not change.(-3.0:) (MUCFH-GA60VB) Defrost finish temperature changes 0.:.(MUCFH-GA35VB) Defrost finish temperature changes from 3.: to 0.:.(MUCFH-GA50VB) Defrost finish temperature changes from 3.: to 5:.(MUCFH-GA60VB) 25

26 TROUBLESHOOTING MUCFH-GA35VB - E MUCFH-GA50VB - E MUCFH-GA60VB - E -. Cautions on troubleshooting. Before troubleshooting, check the following: () Check the power supply voltage. (2) Check the indoor/outdoor connecting wire for mis-wiring. 2. Take care the following during service. () Before servicing the air conditioner, be sure to turn off the main unit first with the remote controller, and then after confirming the horizontal vane has completely closed, turn off the breaker. (2) Be sure to unplug the power cord before removing the air inlet grille, the front panel, the cabinet, the top panel and the electronic control P.C. boards. (3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components. (4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. 3. Troubleshooting procedure () First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. (2) 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. (3) When troubleshooting, refer to -2. Instruction of troubleshooting. 26

27 -2. Instruction of troubleshooting Start Indoor unit operates. Outdoor unit doesn't operate. Indoor unit operates. Outdoor unit doesn't operate normally. Indoor unit doesn't receive the signal from remote controller. OPERATION INDICATOR lamp on the indoor unit is flashing on and off. Outdoor unit operates in only Test Run operation. Outdoor unit doesn't operate even in Test Run operation. Outdoor unit doesn't stop even if indoor unit stops. Unit doesn't operate normal operation in COOL or HEAT mode. Indoor unit operates, when the EMERGENCY OPERATION switch is pressed. Indoor unit doesn't operate, when the EMERGENCY OPERATION switch is pressed. Check room temperature thermistor. Refer to -5. "Test point diagram and voltage". Refer to -4. A "Check of outdoor unit". Refer to -4. C "Check of outdoor unit". Refer to -4. D "Check of R.V. coil". Refer to "Check of remote controller and receiver P.C. board".. Check indoor / outdoor connecting wire. 2. Refer to "Check of indoor electronic control P.C. board". Flash on and off at 0.5- second interval Cause: Indoor/ Outdoor unit Mis-wiring or trouble of serial signal 2-time flash Cause: Indoor unit Trouble of room temperature/ indoor coil thermistor 4-time flash Cause: Indoor unit Trouble of indoor electric control P.C. board 6-time flash Cause: Outdoor unit Trouble of thermistor in outdoor unit 7-time flash Cause: Outdoor unit Trouble of outdoor control system Refer to -4. B "How to check miswiring and serial signal error (When outdoor unit doesn't work)". Check room temperature thermistor and indoor coil thermistor. Refer to -5. "Test point diagram and voltage". Refer to "Check of indoor electric control P.C. board". Refer to -4. E "Check of outdoor thermistor". Replace the deicer P.C. board. As for indoor unit refer to the service manual OB

28 -3. Trouble criterion of main parts MUCFH-GA35VB - E MUCFH-GA50VB - E MUCFH-GA60VB - E Part name Defrost thermistor (RT6) Check method and criterion Measure the resistance with a tester. (Part temperature -0 C ~ 40 C) rmal Abnormal 5kΩ ~ 60kΩ Open or short-circuit Figure Compressor (MC) INNER PROTECTOR MUCFH-GA35VB 55i 5: OPEN 90i0: CLOSE MUCFH-GA50VB /GA60VB 60i 5: OPEN 90i0: CLOSE Measure the resistance between the terminals with a tester. (Part temperature -0 C ~ 40 C) Color of lead wire C-R C-S rmal MUCFH-GA35VB MUCFH-GA50VB MUCFH-GA60VB 2.46 ~ 3.0Ω 2.96 ~ 3.63Ω.05 ~.30Ω 2.38 ~ 2.92Ω 0.84 ~.04Ω.82 ~ 2.24Ω Abnormal Open or short-circuit WHT C P AUX. MAIN S RED R BLK MUCFH-GA35VB MAIN AUX. Outdoor fan motor (MF) MUCFH-GA35VB INNER FUSE 45i2: CUT OFF MUCFH-GA50VB /GA60VB INNER PROTECTOR 45i 8: OPEN ( 88i5: CLOSEw) Measure the resistance between the terminals with a tester. (Part temperature -0 C ~ 40 C) Color of lead wire WHT-BLK BLK-RED BLK-YLW YLW-RED 9 ~ 23 Ω 272 ~ 330 Ω rmal MUCFH-GA35VB MUCFH-GA50VB MUCFH-GA60VB 70 ~ 86 Ω 74 ~ 89 Ω 6 ~ 74 Ω 83 ~ 00 Ω Abnormal Open or short-circuit BLK MUCFH-GA50VB P BLK FUSE MAIN AUX RED WHT REDORNWHT MUCFH-GA60VB MAIN AUX P BLK RED ORN WHT R.V. coil (2S4) Measure the resistance using a tester. (Part temperature -0 C ~ 40 C) rmal Abnormal.94 kω ~ 2.39 kω Open or short-circuit w Reference value P : INNER PROTECTOR 28

29 -4. Troubleshooting flow Compressor and/or outdoor fan motor doesn t operate. A Check of outdoor unit MUCFH-GA35VB - E MUCFH-GA50VB - E Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch. 3-minute time delay works. Test run operation operates for 30 minutes. Compressor doesn't operate. Is there 5V DC between J205 + J0 on the deicer P.C. board? w Is there 230V AC between 3 on the compressor contactor (52C) and N on the outdoor terminal block (TB)? Check the compressor and compressor capacitor. Refer to -3. Replace the deicer P.C. board. Is there 230V AC between 4 on the compressor contactor (52C) and TAB20 on the deicer P.C. board? w Replace the deicer P.C. board. Rectify the indoor and outdoor connecting wire. Is there 230V AC between L N on the outdoor terminal block (TB)? Rectify the connecting wire. Outdoor fan motor doesn't operate. Rectify the indoor and outdoor connecting wire. Is there 5V DC between J205 + J0 on the deicer P.C. board? w Is there 230V AC between 4 on the compressor contactor (52C) and TAB 20 on the deicer P.C. board? w Is there 230V AC between L N on the outdoor terminal block (TB)? Check the outdoor fan motor. Refer to -3. Replace the deicer P.C. board. Rectify the connecting wire. w Refer to

30 Compressor and/or outdoor fan motor doesn t operate. A Check of outdoor unit MUCFH-GA60VB - E Start Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch. 3-minute time delay works. Test run operation operates for 30 minutes. Compressor doesn't operate. Is there 5V DC between J0 + - J40 on the deicer P.C. board? w Is there 230V AC between CN730-3 on the deicer P.C. board? w Replace the deicer P.C. board. Make the connection of wiring correct. Is there 230V AC between A-A2 on the compressor contactor(52c)? Replace the deicer P.C. board. Is there 230V AC between 4 on the compressor contactor(52c) and N on the outdoor terminal block? Check the compressor. Refer to -3.. Is there 230V AC between 3 on the compressor contactor(52c) and N on the outdoor terminal block? Replace the compressor contactor(52c). Make the connection of wiring correct. Outdoor fan motor doesn't operate. Is there 5V DC between J0 + - J40 on the deicer P.C. board? w Is there 230V AC between CN730-3 on the deicer P.C. board? w Replace the deicer P.C. board. Make the connection of wiring correct. Is there 230V AC between CN7-3 or 2-3 on the deicer P.C. board? w Replace the deicer P.C. board. Check the outdoor fan motor. Refer to -3. w Refer to

31 When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. B How to check mis-wiring and serial signal error (when outdoor unit does not work) Start Make them sure. Is this mis-wiring, poor contact, or disconnection of wire?. Turn OFF the power supply(indoor/outdoor unit) and disconnect indoor and outdoor connecting wire on indoor side. 2. Short-circuit between indoor terminal block N and Turn ON the power supply(indoor unit) and press once EMERGENCY OPERATION switch. Is there 20V DC between both ends of R32 on indoor electronic control P.C. board? ( By tester, the stylus is between 0 ~ 20V. ) Turn OFF the power supply(indoor unit). Connect ON indoor and outdoor connecting wire. Replace the indoor electronic control P.C. board. Turn ON the power supply(outdoor unit). Is there 230V AC between outdoor terminal block L-N (TB)? Check the outdoor power supply, power supply cord and connection. Is there 5V DC between J205 + J0 - (MUCFH-GA35VB/GA50VB)/ J0 + J40 - (MUCFH-GA60VB) on the deicer P.C. board? Replace the deicer P.C. board. Turn ON the power supply(indoor unit). During EMERGENCY OPERATION, is there 0V DC between both ends of R60? (By tester, the stylus is between 5 ~0V) Make the wiring between CN730 on the deicer P.C. board and outdoor terminal block correct. Replace the deicer P.C. board. As for indoor unit, refer to the service manual OB380. 3

32 Compressor and/or outdoor fan motor doesn t stop. C Check of outdoor unit MUCFH-GA35VB - E MUCFH-GA50VB - E Turn OFF the power supply. 2 After 30 seconds, turn ON the power supply again. 3 Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch. 4 Operate the unit for minute or more and stop it by pressing the EMERGENCY OPERATION switch again. Does compressor stop? OK Is there 230V AC between 3 on the compressor contactor (52C) and N on the outdoor terminal block (TB)? Replace the deicer P.C. board. Rectify the connecting wire. Does outdoor fan motor stop? Replace the deicer P.C. board. OK MUCFH-GA60VB - E Turn OFF the power supply. 2 After 30 seconds, turn ON the power supply again. 3 Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch. 4 Operate the unit for minute or more and stop it by pressing the EMERGENCY OPERATION switch again. After 30 seconds, does compressor stop? Is there 230V AC between A-A2 on the compressor contactor(52c)? Is there 230V AC between 4 on the compressor contactor and N on the outdoor terminal block? Make the connection of wiring correct. OK Replace the deicer P.C. board. Replace the compressor contactor(52c). After 30 seconds, does outdoor fan motor stop? Replace the deicer P.C. board. OK Unit operates HEAT mode even if it is set to COOL mode. D Check of R.V. coil w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit. Disconnect the TAB52 on the deicer P.C. board. (MUCFH-GA60VB) Turn ON the power supply and operate the indoor unit in COOL mode by pressing the EMERGENCY OPERATION switch. After 3 minutes, does the unit operate in HEAT mode? OK Is there 230V AC between CN72 2 (MUCFH-GA35VB/GA50VB)/ CN72 3 (MUCFH-GA60VB) on the deicer P.C. board? Replace the deicer P.C. board. Replace the R.V. coil. 32

33 Unit operates COOL mode even if it is set to HEAT mode. D Check of R.V. coil w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit. Disconnect the TAB52 on the deicer P.C. board. (MUCFH-GA60VB) Turn ON the power supply and operate the indoor unit in HEAT mode by pressing the EMERGENCY OPERATION switch. After 3 minutes, does the unit operate in COOL mode? OK Is there 230V AC between CN72 2 (MUCFH-GA35VB/GA50VB)/ CN72 3 (MUCFH-GA60VB) on the deicer P.C. board? Replace the R.V. coil. Replace the deicer P.C. board When OPERATION INDICATOR lamp flashes 6-time. Thermistors in the outdoor unit are abnormal. E Check of outdoor thermistor w Disconnect the connectors CN66 from the deicer P.C. board. (Check the characteristics of each thermistor.) Turn OFF the power supply. Defrost thermistor(rt6) Measure resistance between CN 66 and 2. Does the resistance of thermistor have the characteristics on -5.? Replace the thermistor. Reconnect CN66. Turn ON the power supply and press the EMERGENCY OPERATION switch. Replace the deicer P.C. board. Does the unit operate 0 minutes or more? OK W. W. It is thought defective contact of the connector. 33

34 230V AC} -5. Test point diagram and voltage MUCFH-GA35VB - E MUCFH-GA50VB - E Outdoor deicer P.C. board CN7 Outdoor fan motor 230V AC } CN72 R.V. coil 230V AC } Power supply input NR6 Varistor 5V DC J205 J (Refer to -4.A or B.) } F6 Fuse 2A/250V + -- R60 5~0V DC CN66-2 Defrost thermistor RT6 (Refer to -4.E.) } } Defrost interval time short pin (JPDS, JPSG) (Refer to 0-.) Jumper wire for change in defrost setting (JRF,JRG) (Refer to 0-2.) 2V DC J204 J

35 MUCFH-GA60VB - E Outdoor deicer P.C. board Defrost thermistor (RT6) Resistance(k") Temperature(:) CN66-2 Defrost thermistor (RT6) (Refer to -4.E.) Fan motor (CN7) 230V Varistor (NR62) Defrost interval time short pin(jpg, R87) (Refer to 0-.) J0 + 5V DC J40 (Refer to -4.A or B.) } Jumper wire for change in defrost setting (JRF, JRG) (Refer to 0-2.) + R.V. coil } (CN72) 230V } 2V DC Fuse (F6) 3.5A / 250V Varistor (NR6) Power supply input } CN V AC (Refer to -4.A.) } R60 0V DC + (Refer to -4.B.) 35

36 2 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 (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. () Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. Sleeve Locking lever Slide the sleeve. 2Pull the terminal while pushing the locking lever. Connector Hold the sleeve, and pull out the terminal slowly. 2-. MUCFH-GA35VB - OUTDOOR UNIT OPERATING PROCEDURE. Removing the cabinet () Remove the screws of the top panel. (2) Remove the screw of the service panel. (3) Remove the screws of the cabinet. (4) Remove the screws of the front panel and motor support. (5) Remove the service panel, and remove the screw from the insides. (6) Remove the top panel. (7) Remove the cabinet. E Photo PHOTOS Screws of the front panel and motor support Photo 3 Screws of the cabinet Screws of the service panel Screws of the top panel Photo 2 Screws of the cabinet Service panel Screw of the top panel Screws of the cabinet 36

37 OPERATING PROCEDURE 2. Removing the deicer P.C. board () Remove the service panel and the cabinet. (2) Disconnect all the connectors and the terminals on the deicer P.C. board. (3) Remove the deicer P.C. board. Photo 4 PHOTOS Deicer P.C. board Screws Screw Relay panel Terminal block 3. Removing the propeller and the outdoor fan motor () Remove the cabinet. (Refer to.) (2) Remove the propeller nut. (3) Remove the propeller. NOTE : Loose the propeller in the rotating direction for removal. When attaching the propeller, align the mark on the propeller and the motor shaft cut section. Set the propeller in position by using the cut on the shaft and the mark on the propeller. (4) Remove lead clamps and disconnect the outdoor fan motor connector. (5) Remove screws fixing the fan motor. (6) Remove the outdoor fan motor. Photo 5 Propeller nut Screws of the outdoor fan motor Propeller Hook Lead clamps Outdoor fan motor connector Screws of the outdoor fan motor 37

38 OPERATING PROCEDURE 4. Removing the compressor () Remove the cabinet. (Refer to.) (2) Remove the relay panel. (3) Remove the soundproof felt. (4) Remove the terminal cover on the compressor. (5) Disconnect lead wires from the glass terminal of the compressor. (6) Recover gas from the refrigerant circuit. NOTE : Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa). (7) Disconnect the welded part of the discharge pipe. (8) Disconnect the welded part of the suction pipe. (9) Remove nuts fixing the compressor. (0) Remove the compressor. Photo 6 Glass terminal Compressor Discharge pipe PHOTOS Suction pipe Compressor nuts Terminal cover 38

39 2-2. MUCFH-GA50VB - OUTDOOR UNIT OPERATING PROCEDURE. Removing the cabinet () Remove the screws of the cabinet. (2) Hold the bottom of the cabinet on both sides and remove the cabinet. E Photo PHOTOS Photo 2 Screws of the cabinet Screws of the cabinet Service panel 2. Removing the deicer P.C. board () Remove the service panel and the cabinet. (2) Disconnect all the connectors and the terminals on the deicer P.C. board. (3) Remove the deicer P.C. board. Photo 3 Screw of the relay panel Deicer P.C. board Terminal blocks Relay panel Screw of the relay panel 39

40 OPERATING PROCEDURE PHOTOS 3. Removing the propeller and the outdoor fan motor () Remove the cabinet. (Refer to.) (2) Remove the propeller nut and the propeller. NOTE : Loose the propeller in the rotating direction for removal. When attaching the propeller, align the mark on the propeller and the motor shaft cut section. Set the propeller in position by using the cut on the shaft and the mark on the propeller. (3) Remove the clamp of outdoor fan motor lead wire and disconnect the outdoor fan motor connector. (4) Remove the screws fixing the outdoor fan motor. (5) Remove the outdoor fan motor. Photo 4 Propeller Set screws of the outdoor fan motor Lead clamps Propeller nut Set screws of the outdoor fan motor Outdoor fan motor 4. Removing the compressor () Remove the cabinet. (Refer to.) (2) Remove the relay panel. (3) Remove the soundproof felt. (4) Remove the terminal cover on the compressor. (5) Disconnect lead wires from the compressor. (6) Recover gas from the refrigerant circuit. NOTE : Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa). (7) Disconnect the welded part of the discharge pipe. (8) Disconnect the welded part of the suction pipe. (9) Remove nuts fixing the compressor. (0) Remove the compressor. Photo 5 Discharge pipe Terminal cover Compressor Suction pipe Compressor nuts 40

41 2-3. MUCFH-GA60VB - OUTDOOR UNIT E OPERATING PROCEDURE.Removing the cabinet () Remove the screws of the service panel. (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover. (4) Remove the service panel. (5) Remove the top panel. (6) Remove the valve cover. (7) Remove the screws of the front panel. (8) Remove the front panel. (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 2 Screws of the cabinet Screw of the service panel Screws of the back panel Screws of the front panel Screws of the top panel Set screws of the back panel Screw of the valve cover 2. Removing the deicer P.C. board () Remove the service panel and the cabinet. (2) Disconnect all the connectors and the terminals on the deicer P.C. board. (3) Remove the deicer P.C. board. Photo 4 Deicer P.C. board Terminal blocks Screws of the relay panel Screws of the relay panel 4

42 OPERATING PROCEDURE 3. Removing the propeller and the outdoor fan motor () Remove the cabinet. (Refer to.) (2) Remove the propeller nut and the propeller. NOTE : Loose the propeller in the rotating direction for removal. When attaching the propeller, align the mark on the propeller and the motor shaft cut section. Set the propeller in position by using the cut on the shaft and the mark on the propeller. (3) Remove the clamp of outdoor fan motor lead wire and disconnect the outdoor fan motor connector. (4) Remove the screws fixing the outdoor fan motor. (5) Remove the outdoor fan motor. Photo 5 Propeller nut PHOTOS Set screws of the outdoor fan motor Propeller Set screws of the outdoor fan motor 4. Removing the compressor () Remove the cabinet. (Refer to.) (2) Remove the relay panel. (3) Remove the soundproof felt. (4) Remove the terminal cover on the compressor. (5) Disconnect lead wires from the compressor. (6) Recover gas from the refrigerant circuit. NOTE : Recover gas from the pipes until the pressure gauge shows 0 kg/cm 2 (0 MPa). (7) Disconnect the welded part of the discharge pipe. (8) Disconnect the welded part of the suction pipe. (9) Remove nuts fixing the compressor. (0) Remove the compressor. Photo 6 Suction pipe Discharge pipe Terminal cover Compressor nuts 42

43 3 PARTS LIST MUCFH-GA35VB - E 3-. OUTDOOR UNIT STRUCTURAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty/unit. Part. Part name in Wiring Remarks Diagram MUCFH-GA35VB- E E E E E E E E E E E E E E E E E E OUTDOOR HEAT EXCHANGER CABINET GRILLE(OUT) COMPRESSOR COMPRESSOR RUBBER SET BASE STOP VALVE(GAS) STOP VALVE(LIQUID) 4-WAY VALVE SERVICE PANEL BACK PANEL MOTOR SUPPORT TOP PANEL CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE MC 3 2 RN35VHSHT 3RUBBERS/SET {2.7 {6.35 {3.0x{.4x500 {3.0x{.6x600 {3.0x{.6x050 43

44 MUCFH-GA35VB - E 3-2. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 3-3. ACCESSORY OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty/unit. Part. Part name in Wiring Remarks MUCFH-GA35VB- E Diagram E E E E E E E E E E E PROPELLER OUTDOOR FAN MOTOR COMPRESSOR CAPACITOR DEICER P.C. BOARD SURGE ABSORBER TERMINAL BLOCK TERMINAL BLOCK DEFROST THERMISTOR R. V. COIL FUSE VARISTOR MF C DSAR TB TB2 RT6 2S4 F6 NR6 RA6V /440V AC 3P 2P 250V /2A 3-3. ACCESSORY 2 3 E E DRAIN SOCKET DRAIN CAP 2 [33 2PCS/SET 44

45 MUCFH-GA50VB - E 3-4. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 2 DEFROST THERMISTOR ACCESSORY Part numbers that are circled are not shown in the illustration Part. E E E E E E E E E E E E E E E E E E E E E E E E E E E E E ACCESSORY E E E OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part Name BACK PANEL CABINET GRILLE OUTDOOR HEAT EXCHANGER PROPELLER MOTOR SUPPORT COMPRESSOR RUBBER SET COMPRESSOR BASE STOP VALVE(GAS) STOP VALVE(LIQUID) SERVICE PANEL 4-WAY VALVE COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR SURGE ABSORBER DEICER P.C. BOARD TERMINAL BLOCK TERMINAL BLOCK DEFROST THERMISTOR HANDLE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE FUSE R.V. COIL CHECK VALVE VARISTOR DRAIN SOCKET DRAIN CAP DRAIN CAP Symbol in Wiring Diagram 45 MC C MF DSAR TB TB2 RT6 F6 2S4 NR6 Q'ty/unit MUCFH-GA50VB E Remarks 3RUBBERS/SET RN96VHSHT {2.7 { /440V AC RA6V50-3P 2P {3.0 { {3.0 { {3.0 { {2.5 { V / 2A [33 2PCS/SET [6