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Mitsubishi Electric MUCFH-GA35VB Service Manual
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Mitsubishi Electric MUCFH-GA35VB Service Manual

Floor and ceiling type air conditioners
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FLOOR AND CEILING TYPE AIR CONDITIONERS

OUTDOOR UNIT

SERVICE MANUAL

Models
MUCFH-GA35VB -
MUCFH-GA50VB -
MUCFH-GA60VB -
MUCFH-GA50VB
NOTE:
This service manual describes technical data of the outdoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS PARTS LIST (RoHS compliant).
• The fan guard for MUCFH-GA 60VB-
has been changed.
Please void OB381 REVSED EDITION-A.
HFC
utilized
R410A
E1
E1
E1
Indoor unit service manual
MCFH-GA•VB Series (OB380)
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································6
4. NOISE CRITERIA CURVES ·······························7
5. OUTLINES AND DIMENSIONS ·························8
6. WIRING DIAGRAM ··········································10
7. REFRIGERANT SYSTEM DIAGRAM ··············11
8. PERFORMANCE CURVES ······························13
9. ACTUATOR CONTROL····································24
10. SERVICE FUNCTIONS·····································24
11. TROUBLESHOOTING ······································25
12. DISASSEMBLY INSTRUCTIONS·····················35
13. PARTS LIST······················································42
14. RoHS PARTS LIST···········································48
E1
No. OB381
REVISED EDITION-B

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Summary of Contents for Mitsubishi Electric MUCFH-GA35VB

  • Page 1: Table Of Contents

    Please void OB381 REVSED EDITION-A. OUTDOOR UNIT No. OB381 SERVICE MANUAL REVISED EDITION-B utilized R410A Models MUCFH-GA35VB - MUCFH-GA50VB - MUCFH-GA60VB - Indoor unit service manual MCFH-GA•VB Series (OB380) CONTENTS 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················5 3. SPECIFICATION·················································6 4.

  • Page 2: Technical Changes

    • RoHS PARTS LIST has been added. Revision B : • The fan guard for MUCFH-GA 60VB- has been changed. TECHNICAL CHANGES ➔ MUCFH-GA35VB - MUH-A12YV - 1. Indication of capacity has been changed. (BTU base ➔ kW) ➔ MUCFH-GA50VB - MUCFH-A18WV - 1.
  • Page 3 New Specification Current Specification The incompatible refrigeration oil easily separates from Since refrigerant and refrigerating oil are compatible each, refrigerant and is in the upper layer inside the suction muffler. refrigeration oil goes back to the compressor through the Raising position of the oil back hole enables to back the lower position oil back hole.
  • Page 4 2.Refrigerant piping 1 Specifications Use the refrigerant pipes that meet the following specifications. Outside diameter Wall Pipe Insulation material thickness 6.35 0.8 mm For liquid Heat resisting foam plastic 9.52 0.8 mm Specific gravity 0.045 Thickness 8 mm 12.7 0.8 mm For gas 1.0 mm 15.88...

  • Page 5: Part Names And Functions

    PART NAMES AND FUNCTIONS MUCFH-GA35VB MUCFH-GA50VB Air inlet Air inlet (back and side) (back and side) Piping Piping Drain hose Drain hose Air outlet Air outlet Drain outlet Drain outlet MUCFH-GA60VB Air inlet (back and side) Piping Drain hose Air outlet...

  • Page 6: Specification

    SPECIFICATION Outdoor model MUCFH-GA35VB MUCFH-GA50VB MUCFH-GA60VB Cooling Cooling Heating Cooling Heating Heating Function Single phase Single phase Single phase Power supply 230V, 50Hz 230V, 50Hz 230V, 50Hz Capacity Dehumidification — — — Air flow(High) K /h 1,710 2,196 2,760 Power outlet 10.51...

  • Page 7: Noise Criteria Curves

    NOISE CRITERIA CURVES MUCFH-GA35VB MUCFH-GA50VB SPL(dB LINE FUNCTION SPL(dB LINE FUNCTION COOLING COOLING HEATING HEATING Test conditions, Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:) Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:) Heating : Dry-bulb temperature 7: Wet-bulb temperature...

  • Page 8: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm MUCFH-GA35VB REQUIRED SPACE Air in Air in Drainage 3 holes [33 Air out Service panel Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35 Gas refrigerant pipe joint Refrigerant pipe (flared) [12.7 MUCFH-GA50VB REQUIRED SPACE Drainage hole [16.2...
  • Page 9 MUCFH-GA60VB Unit: mm Open as a rule 500mm or more if the front and both REQUIRED SPACE sides are open 100mm or more 200mm or more if 100mm or more there are obstacles to both sides Open as a rule 500mm or more if the back, 350mm or more both sides and top are open...

  • Page 10: Wiring Diagram

    WIRING DIAGRAM MUCFH-GA35VB 21S4 RT61 CN661 CN721 INDOOR UNIT CN711 CONNECTING SR61 CIRCUIT BREAKER POWER SUPPLY TAB20 230V 50Hz DEICER P.C.BOARD NAME SYMBOL SYMBOL NAME SYMBOL NAME TRANSFORMER COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR (INNER FUSE) TERMINAL BLOCK OUTDOOR FAN CAPACITOR...

  • Page 11: Refrigerant System Diagram

    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 REFRIGERANT SYSTEM DIAGRAM MUCFH-GA35VB Unit:mm Refrigerant pipe [12.7 4-way valve (with heat insulator) Stop valve...
  • Page 12 MUCFH-GA50VB Refrigerant pipe [12.7 4- way valve (with heat insulator) Oil separator Stop valve #100 (with service port) Outdoor heat Defrost Flared connection exchanger thermistor RT61 Capillary tube [2.5o[0.6o1,000 Compressor Capillary tube [3.0o[1.6o750 Flared connection (2 pcs) Capillary tube [3.0o[1.6o650 R.V.

  • Page 13: Performance Curves

    MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Refrigerant piping Piping size O.D. : mm Model MAX. length : m Liquid MUCFH-GA35VB {12.7 {6.35 MUCFH-GA50VB {15.88 MUCFH-GA60VB wIt does not matter which unit is higher. A: Refrigerant piping Max.length 25m ADDITIONAL REFRIGERANT CHARGE (R410A : g) If pipe length exceeds 7m, additional refrigerant (R410A) charge is required.
  • Page 14 How to measure the indoor air wet-bulb/dry-bulb temperature difference 1. 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.
  • Page 15 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 : 1(MPa [Gauge]) =10.2(kgf/f f [Gauge]) MUCFH-GA35VB (kgf/F[Gauge])(MPa[Gauge]) 230V 230V...
  • Page 16 HEAT operation Condition Indoor : Dry bulb temerature 20.0: Outdoor : Dry bulb temerature 7,15,20: Wet bulb temerature 14.5: Wet bulb temerature 6,12,14.5: MUCFH-GA35VB MUCFH-GA50VB 230V 230V 25(:) Ambient temperature (:) Ambient temperature(˚C) Ambient humidity (%) Ambient humidity(%) MUCFH-GA60VB 230V...
  • Page 17 PERFORMANCE DATA COOL operation (230V) MCFH-GA35VB : MUCFH-GA35VB CAPACITY :3.5(kW) SHF :0.70 INPUT :1160(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 4.11 2.14 0.52 3.94 2.05 0.52 3.78 1.97 0.52 1021 3.64 1.89 0.52...
  • Page 18 PERFORMANCE DATA COOL operation (230V) MCFH-GA35VB : MUCFH-GA35VB CAPACITY :3.5(kW) SHF :0.70 INPUT :1160(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 3.43 1.78 0.52 1137 3.15 1.64 0.52 1206 3.03 1.57 0.52 1230 3.61 1.44 0.40...
  • Page 19 PERFORMANCE DATA COOL operation(230V) MCFH-GA50VB : MUCFH-GA50VB CAPACITY :4.8(kW) SHF :0.65 INPUT :1810(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 5.64 2.65 0.47 1448 5.40 2.54 0.47 1520 5.18 2.44 0.47 1593 4.99 2.35 0.47 1665...
  • Page 20 PERFORMANCE DATA COOL operation(230V) MCFH-GA50VB : MUCFH-GA50VB CAPACITY :4.8(kW) SHF :0.65 INPUT :1810(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 4.70 2.21 0.47 1774 4.32 2.03 0.47 1882 4.15 1.95 0.47 1919 4.94 1.73 0.35 1846 4.61 1.61 0.35...
  • Page 21 PERFORMANCE DATA COOL operation(230V) MCFH-GA60VB : MUCFH-GA60VB CAPACITY :6.0(kW) SHF :0.64 INPUT :2450(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 7.05 3.24 0.46 1960 6.75 3.11 0.46 2058 6.48 2.98 0.46 2156 6.24 2.87 0.46 2254...
  • Page 22 PERFORMANCE DATA COOL operation(230V) MCFH-GA60VB : MUCFH-GA60VB CAPACITY :6.0(kW) SHF :0.64 INPUT :2450(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 5.88 2.70 0.46 2401 5.40 2.48 0.46 2548 5.19 2.39 0.46 2597 6.18 2.10 0.34 2499 5.76 1.96 0.34...
  • Page 23 PERFORMANCE DATA HEAT operation(230V) MCFH-GA35VB : MUCFH-GA35VB CAPACITY : 3.7(kW) INPUT : 1020(W) OUTDOOR WB(:) INDOOR DB(:) INPUT INPUT INPUT INPUT INPUT INPUT INPUT 2.33 2.81 3.29 3.77 4.26 1030 4.70 1061 5.18 1081 2.22 2.66 3.15 3.59 1010 4.07 1061 4.51...

  • Page 24: Actuator Control

    MUCFH-GA60VB 10-1. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JPDS and JPSG (MUCFH-GA35VB/GA50VB) / JPG1 and R871 (MUCFH-GA60VB) on the outdoor deicer P.C. board, defrosting mode can be accomplished regardless of the defrost interval restriction. Defrost thermistor RT61 must read below -3:. (Refer to 11-5.) 10-2.

  • Page 25: Troubleshooting

    TROUBLESHOOTING MUCFH-GA35VB MUCFH-GA50VB MUCFH-GA60VB 11-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following: (1) Check the power supply voltage. (2) Check the indoor/outdoor connecting wire for mis-wiring. 2. Take care the following during service. (1) 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.
  • Page 26 11-2. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit Indoor unit Indoor unit operates. operates. OPERATION INDICATOR doesn't receive Outdoor unit Outdoor unit lamp on the indoor unit is the signal from doesn't doesn't operate flashing on and off. remote controller. operate. normally.
  • Page 27 11-3. TRUBLE CRITERION OF MAIN PARTS MUCFH-GA35VB MUCFH-GA50VB MUCFH-GA60VB Figure Part name Check method and criterion Defrost Measure the resistance with a tester. thermistor (RT61) (Part temperature -10°C ~ 40°C) Normal Abnormal 5kΩ ~ 60kΩ Open or short-circuit Compressor (MC) Measure the resistance between the terminals with a tester.

  • Page 28: Troubleshooting Flow

    11-4. TROUBLESHOOTING FLOW Compressor and/or outdoor fan motor doesn’t operate. Check of outdoor unit MUCFH-GA35VB MUCFH-GA50VB 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.
  • Page 29 Compressor and/or outdoor fan motor doesn’t operate. Check of outdoor unit MUCFH-GA60VB 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 230V AC between Is there 5V DC between Make the connection...
  • Page 30 Is there 230V AC between outdoor terminal power supply cord and block L-N (TB1)? connection. Is there 5V DC between J205 + –J101 - (MUCFH-GA35VB/GA50VB)/ Replace the deicer P.C. board. J101 + –J401 - (MUCFH-GA60VB) on the deicer P.C. board? Turn ON the power supply(indoor unit).
  • Page 31 EMERGENCY OPERATION switch. After 3 minutes, does the unit operate in HEAT mode? Is there 230V AC between CN7211 – 2 (MUCFH-GA35VB/GA50VB)/ Replace the R.V. coil. CN7211 – 3 (MUCFH-GA60VB) on the deicer P.C. board? Replace the...
  • Page 32 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? Is there 230V AC between CN7211 – 2 (MUCFH-GA35VB/GA50VB)/ Replace the CN7211 – 3 (MUCFH-GA60VB) deicer P.C. board on the deicer P.C. board? Replace the R.V.
  • Page 33 11-5. TEST POINT DIAGRAM AND VOLTAGE MUCFH-GA35VB MUCFH-GA50VB Outdoor deicer P.C. board CN711 CN721 Power supply input Outdoor fan motor R.V. coil 230V AC 230V AC 230V AC NR61 Varistor Fuse 2A/250V R601 5~10V DC Defrost interval time short pin (JPDS, JPSG) (Refer to 10-1.)
  • Page 34 MUCFH-GA60VB Outdoor deicer P.C. board Defrost thermistor (RT61) -20 -10 10 20 30 40 Temperature(:) CN661 1-2 Defrost thermistor (RT61) Fan motor (Refer to 11-4.E.) Varistor (CN711) (NR62) 230V R.V. coil (CN721) 230V Defrost interval time short 12V DC pin(JPG1, R871) Fuse (F61) (Refer to...

  • Page 35: Disassembly Instructions

    2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 12-1. MUCFH-GA35VB OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the top panel. Screws of the front panel and motor support (2) Remove the screw of the service panel.
  • Page 36 OPERATING PROCEDURE PHOTOS 2. Removing the deicer P.C. board Photo 4 (1) Remove the service panel and the cabinet. (2) Disconnect all the connectors and the terminals on the Deicer deicer P.C. board. Screws P.C. board (3) Remove the deicer P.C. board. Terminal Relay panel Screw...
  • Page 37 OPERATING PROCEDURE PHOTOS 4. Removing the compressor Photo 6 (1) Remove the cabinet. (Refer to 1.) (2) Remove the relay panel. Suction pipe Discharge pipe (3) Remove the soundproof felt. (4) Remove the terminal cover on the compressor. (5) Disconnect lead wires from the glass terminal of the com- pressor.
  • Page 38 12-2. MUCFH-GA50VB OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the cabinet. (2) Hold the bottom of the cabinet on both sides and remove the cabinet. Photo 2 Screws of the cabinet Service Screws of panel the cabinet 2.
  • Page 39 OPERATING PROCEDURE PHOTOS 3. Removing the propeller and the outdoor fan motor (1) Remove the cabinet. (Refer to 1.) Photo 4 Set screws of the (2) Remove the propeller nut and the propeller. outdoor fan motor Propeller NOTE : Loose the propeller in the rotating direction for Lead clamps removal.
  • Page 40 12-3. MUCFH-GA60VB OPERATING PROCEDURE PHOTOS 1.Removing the cabinet Photo 1 Screw of the top panel (1) 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.
  • Page 41 PHOTOS OPERATING PROCEDURE 3. Removing the propeller and the outdoor fan motor Photo 5 (1) Remove the cabinet. (Refer to 1.) (2) Remove the propeller nut and the propeller. NOTE : Loose the propeller in the rotating direction for Set screws of the removal.

  • Page 42: Parts List

    PARTS LIST (non-RoHS compliant) MUCFH-GA35VB 13-1. OUTDOOR UNIT STRUCTURAL PARTS...
  • Page 43 PARTS LIST (non-RoHS compliant) MUCFH-GA35VB 13-1. OUTDOOR UNIT STRUCTURAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part name Remarks MUCFH-GA35VB- Diagram E02 837 630 OUTDOOR HEAT EXCHANGER E02 815 232...
  • Page 44 PARTS LIST (non-RoHS compliant) MUCFH-GA35VB 13-3. ACCESSORY 13-2. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 13-2. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No.
  • Page 45 PARTS LIST (non-RoHS compliant) MUCFH-GA50VB 13-4. OUTDOOR UNIT STRUCTURAL PARTS, 13-5. ACCESSORY ELECTRICAL PARTS AND FUNCTIONAL PARTS DEFROST THERMISTOR 13-4. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring...
  • Page 46 PARTS LIST (non-RoHS compliant) MUCFH-GA60VB 13-6. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 13-7. ACCESSORY...
  • Page 47 PARTS LIST (non-RoHS compliant) MUCFH-GA60VB 13-6. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part Name Remarks MUCFH-GA60VB - Diagram E02 819 297 TOP PANEL E02 821 630 OUTDOOR HEAT EXCHANGER...

  • Page 48: Rohs Parts List

    RoHS PARTS LIST (RoHS compliant) MUCFH-GA35VB 14-1. OUTDOOR UNIT STRUCTURAL PARTS...
  • Page 49 PARTS LIST (non-RoHS compliant) MUCFH-GA35VB 14-1. OUTDOOR UNIT STRUCTURAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Remarks Part name MUCFH-GA35VB- Diagram E12 837 630 OUTDOOR HEAT EXCHANGER E12 815 232...
  • Page 50 RoHS PARTS LIST (RoHS compliant) MUCFH-GA35VB 14-3. ACCESSORY 14-2. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 14-2. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part name in Wiring Part No.
  • Page 51 RoHS PARTS LIST (RoHS compliant) MUCFH-GA50VB 14-4. OUTDOOR UNIT STRUCTURAL PARTS, 14-5. ACCESSORY ELECTRICAL PARTS AND FUNCTIONAL PARTS DEFROST THERMISTOR 14-4. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring...
  • Page 52 RoHS PARTS LIST (RoHS compliant) MUCFH-GA60VB 14-6. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 14-7. ACCESSORY...
  • Page 53 RoHS PARTS LIST (RoHS compliant) MUCFH-GA60VB 14-6. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part Name Remarks MUCFH-GA60VB - Diagram E12 819 297 TOP PANEL E12 821 630 OUTDOOR HEAT EXCHANGER...
  • Page 56 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jun 2010. No.OB381 REVISED EDITION-B 5 Distributed in May 2006. No.OB381 REVISED EDITION-A 6 New publication, effective Jun. 2010 Distributed in Jan. 2005. No.OB381 6 Specifications subject to change without notice.

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