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Mitsubishi Electric MU-GA50VB Service Manual
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Mitsubishi Electric MU-GA50VB Service Manual

Mitsubishi Electric MU-GA50VB Service Manual

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SPLIT-TYPE, AIR CONDITIONERS
OUTDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MU-GA50VB -
MU-GA60VB -
MU-GA80VB -
NOTE:
• This service manual describes technical data of 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.
A1
A1
A1
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································3
4. NOISE CRITERIA CURVES ·······························5
5. OUTLINES AND DIMENSIONS ·························6
6. WIRING DIAGRAM ············································7
7. REFRIGERANT SYSTEM DIAGRAM ················9
8. PERFORMANCE CURVES ······························12
9.TROUBLESHOOTING·······································20
10. DISASSEMBLY INSTRUCTIONS·····················28
MU-GA50VB
11. PARTS LIST······················································32
12. RoHS PARTS LIST···········································34
No. OB464
HFC
utilized
R410A
Indoor unit service manual
MS-GA·VB (OB463)

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  • Page 1: Table Of Contents

    SPLIT-TYPE, AIR CONDITIONERS OUTDOOR UNIT No. OB464 SERVICE MANUAL utilized R410A Wireless type Models MU-GA50VB - MU-GA60VB - MU-GA80VB - Indoor unit service manual MS-GA·VB (OB463) CONTENTS 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················3 3. SPECIFICATION·················································3 4. NOISE CRITERIA CURVES ·······························5 5.

  • Page 2: Technical Changes

    TECHNICAL CHANGES MU-A18WV - MU-GA50VB - 1. Model name has been changed. Indication of capacity has been changed. (BTU 2. Valve cover has been added. 3. Fan motor has been changed. (RA6V50-OG RA6V60-MA) MU-A24WV - MU-GA60VB - 1. Model name has been changed.

  • Page 3: Part Names And Functions

    PART NAMES AND FUNCTIONS OUTDOOR UNIT MU-GA50VB MU-GA60VB MU-GA80VB Air inlet Air inlet (back and side) (back and side) Piping Drainage hose Air outlet Air outlet Drain outlet SPECIFICATION Outdoor model MU-GA50VB MU-GA60VB Function Cooling Cooling Single phase Single phase...
  • Page 4 Outdoor model MU-GA80VB Function Cooling Single phase Power supply 230V, 50Hz Capacity Dehumidification Air flow(High/Low) K /h 2,940/1,470 Power outlet Running current 12.91 Power input 2,881 Power factor Starting current 45 or less Compressor motor current 12.34 Fan motor current 0.57 Maximum current 20.0...

  • Page 5: Noise Criteria Curves

    NOISE CRITERIA CURVES MU-GA50VB FAN SPEED SPL(dB(A)) LINE High Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24: NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz...

  • Page 6: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MU-GA50VB Unit: mm REQUIRED SPACE OUTDOOR UNIT Drainage hole [16.2 Air in Air in Drainage Air out 3holes [33 Service panel Liquid refrigerant pipe joint Refrigerant pipe (Flared) [6.35 Gas refrigerant pipe joint Refrigerant pipe (flared) [12.7...

  • Page 7: Wiring Diagram

    WIRING DIAGRAM MU-GA50VB OUTDOOR UNIT INDOOR UNIT CONNECTING DSAR CIRCUIT BREAKER POWER SUPPLY 230V 50Hz GRN/YLW SYMBOL NAME SYMBOL NAME SYMBOL NAME COMPRESSOR CAPACITOR COMPRESOR (INNER PROTECTOR) COMPRESSOR CONTACTOR OUTDOOR FAN CAPACITOR OUTDOOR FAN MOTOR (INNER PROTECTOR) DSAR SURGE ABSORBER...
  • Page 8 MU-GA60VB MU-GA80VB OUTDOOR UNIT RT62 RT63 6 5 4 3 CIRCUIT BREAKER CN711 CN662 CN724 SR62 SR61 TAB52 CN730 DEICER NR61 P.C. BOARD LD83 LD81 LD80 LD82 NOISE FILTER PC BOARD SYMBOL NAME SYMBOL NAME SYMBOL NAME CURRENT TRANS COMPRESSOR (INNER PROTECTOR) SR62 SOLID STATE RELAY COMPRESSOR CAPACITOR...

  • Page 9: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MU-GA50VB Unit:mm OUTDOOR UNIT Oil separator Refrigerant pipe [12.7 Capillary tube (with heat insulator) Muffler [2.5o[0.6o1,000 Stop valve Outdoor (with service heat port) Flared connection exchanger Strainer #100 Compressor Flared connection Stop valve Capillary tube [3.0o[1.6o350 Refrigerant pipe[6.35...
  • Page 10 Refrigerant pipe [6.35 (MU-GA60VB) (with heat insulator) MAX. REFRIGERANT PIPING LENGTH Refrigerant piping : m Piping size O.D : mm Model Max. length Max. Height difference Liquid MU-GA50VB 12.7 6.35 MU-GA60VB 15.88 MU-GA80VB 9.52 MAX. HEIGHT DIFFERENCE Indoor unit Max. Height difference Max.
  • Page 11 ADDITIONAL REFRIGERANT CHARGE(R410A : g) Refrigerant piping length (one way) Outdoor unit precharged Model 1,600 MU-GA50VB Calculation : Xg=20g (Refrigerant piping length (m)–7) Refrigerant piping length (one way) Outdoor unit precharged Model 2,400 MU-GA60VB Calculation : Xg=20g (Refrigerant piping length (m)–7)

  • Page 12: Performance Curves

    PERFORMANCE CURVES MU-GA50VB MU-GA60VB MU-GA80VB The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions, since operating conditions vary according to the areas where these units are installed. The following information has been pro- vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
  • Page 13 2 2 Air flow should be set at MAX. (MPa[Gauge]) MU-GA50VB MU-GA50VB 230V 230V 35(:) 70(%) 70(%) Ambient temperature(˚C) Ambient temperature(˚C) Ambient humidity(%) Ambient humidity(%) MU-GA60VB MU-GA60VB (MPa[Gauge]) 230V 230V 35(:) 70(%) 70(%) Ambient temperature(˚C) Ambient temperature(˚C) Ambient humidity(%) Ambient humidity(%)
  • Page 14 PERFORMANCE DATA COOL operation MS-GA50VB : MU-GA50VB (230V) CAPACITY : 5.1(kW) SHF : 0.81 INPUT : 1750(W) OUTDOOR DB (:) INDOOR INDOOR DB (:) WB (:) SHF INPUT SHF INPUT SHF INPUT SHF INPUT 5.99 3.78 0.63 1400 5.74 3.61 0.63...
  • Page 15 PERFORMANCE DATA COOL operation MS-GA50VB : MU-GA50VB (230V) CAPACITY : 5.1(kW) SHF : 0.81 INPUT : 1750(W) OUTDOOR DB (:) INDOOR INDOOR DB (:) WB (:) SHF INPUT SHF INPUT SHF INPUT 5.00 3.15 0.63 1715 4.59 2.89 0.63 1820 4.41...
  • Page 16 PERFORMANCE DATA COOL operation MS-GA60VB : MU-GA60VB (230V) CAPACITY : 6.5(kW) SHF : 0.76 INPUT : 2320(W) OUTDOOR DB (:) INDOOR INDOOR DB (:) WB (:) SHF INPUT SHF INPUT SHF INPUT SHF INPUT 7.64 4.43 0.58 1856 7.31 4.24 0.58 1949 7.02...
  • Page 17 PERFORMANCE DATA COOL operation MS-GA60VB : MU-GA60VB (230V) CAPACITY : 6.5(kW) SHF : 0.76 INPUT : 2320(W) OUTDOOR DB (:) INDOOR INDOOR DB (:) WB (:) SHF INPUT SHF INPUT SHF INPUT 6.37 3.69 0.58 2274 5.85 3.39 0.58 2413 5.62 3.26 0.58...
  • Page 18 PERFORMANCE DATA COOL operation MS-GA80VB : MU-GA80VB (230V) CAPACITY : 7.8(kW) SHF : 0.69 INPUT : 2950(W) OUTDOOR DB (:) INDOOR INDOOR DB (:) WB (:) SHF INPUT SHF INPUT SHF INPUT SHF INPUT 9.17 4.67 0.51 2360 8.78 4.48 0.51 2478 8.42...
  • Page 19 PERFORMANCE DATA COOL operation MS-GA80VB : MU-GA80VB (230V) CAPACITY : 7.8(kW) SHF : 0.69 INPUT : 2950(W) OUTDOOR DB (:) INDOOR INDOOR DB (:) WB (:) SHF INPUT SHF INPUT SHF INPUT 7.64 3.90 0.51 2891 7.02 3.58 0.51 3068 6.75 3.44 0.51...

  • Page 20: Troubleshooting

    TROUBLESHOOTING MU-GA50VB MU-GA60VB MU-GA80VB 9-1. 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 servicing. (1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.
  • Page 21 Test Run EMERGENCY if indoor unit OPERATION Test Run operation.w OPERATION stops. switch is pressed. operation.w switch is pressed. MU-GA50VB 1. Check indoor / Refer to Check of wiring Check room MU-GA60/ outdoor "Check of diagram of outdoor temperature GA80VB connecting wire.
  • Page 22 9-3. Trouble criterion of main parts MU-GA50VB MU-GA60VB MU-GA80VB Part name Check method and criterion Figure Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up. Discharge temperature (Part temperature 0˚C ~ 40˚C)
  • Page 23 9-4. Troubleshooting flow Compressor and/or outdoor fan motor doesn’t operate. Check of outdoor unit MU-GA60VB MU-GA80VB Turn ON the power supply. Is there 230V AC to Check the outdoor power supply between on the and connection of wiring. outdoor terminal block Compressor does not operate.
  • Page 24 Compressor and/or outdoor fan motor doesn’t stop. Check of outdoor unit MU-GA60VB MU-GA80VB 1 Turn OFF the power supply. 2 After 30 seconds, turn ON the power supply again. 3 Operate the unit in COOL mode by pressing the EMERGENCY OPERATION switch. 4 Operate the unit for 1 minute or more and stop it by pressing the EMERGENCY OPERATION switch again.
  • Page 25 When OPERATION INDICATOR lamp flashes 10-time. Cooling doesn't operate. Check of LEV (Expansion valve) MU-GA60VB MU-GA80VB Turn ON the power supply. 1 While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time, press RESET button. 2 First, release RESET button.
  • Page 26 9-5. Test point diagram and voltage 1. Outdoor deicer P.C. board MU-GA60VB MU-GA80VB Ambient temperature thermistor (RT63) Discharge temperature thermistor(RT62) -20 -10 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 110 120 Temperature(:) Temperature(:) CN662 1-2 CN662 3-4...
  • Page 27 2. Noise filter P.C. board MU-GA60VB MU-GA80VB LD83 LD81 Power supply Power supply input 230V AC output 230V AC LD80 LD82 3. Soft start relay MU-GA60VB MU-GA80VB Terminal 1 Terminal 2...

  • Page 28: Disassembly Instructions

    2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 10-1. MU-GA50VB OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the cabinet. (2) Hold the down of the cabinet on the both side and remove Screws the cabinet.
  • Page 29 OPERATING PROCEDURE PHOTOS 3. Removing the propeller and the outdoor fan motor Hook Photo 4 (1) Remove the cabinet. (Refer to 1.) (2) Disconnect the connector and remove the hooked lead wire from the fan motor. (3) Remove the propeller nut and remove the propeller. (4) Remove screws fixing the outdoor fan motor.
  • Page 30 10-2. MU-GA60VB MU-GA80VB OUTDOOR UNIT 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.
  • Page 31 OPERATING PROCEDURE PHOTOS 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 removal. Set screws of the When attaching the propeller, align the mark on the outdoor fan motor...

  • Page 32: Parts List

    PARTS LIST (non-RoHS compliant) MU-GA60VB MU-GA80VB 11-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS...
  • Page 33 PARTS LIST (non-RoHS compliant) MU-GA60VB MU-GA80VB 11-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Remarks Part No. Part Name in Wiring MU-GA60VB MU-GA80VB Diagram TOP PANEL E02 819 297 OUTDOOR HEAT EXCHANGER E02 819 630...

  • Page 34: Rohs Parts List

    RoHS PARTS LIST (RoHS compliant) MU-GA50VB 12-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS...
  • Page 35 RoHS PARTS LIST (RoHS compliant) MU-GA50VB 12-1. 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 MU-GA50VB- Diagram E12 A27 233...
  • Page 36 HEAD OFFICE: TOKYO BLDG.,2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jul. 2006. No.OB464 6 New publication, effective Jul. 2006 Made in Japan Specifications subject to change without notice.

This manual is also suitable for:

Mu-ga60vbMu-ga80vb

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