Mitsubishi Electric MSH-GA50VB Service Manual
Wireless type
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- Operating instructions manual (13 pages) ,
- Operating instructions manual (24 pages) ,
- Service manual (28 pages)
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Wireless type
Models
MSH-GA50VB -
MSH-GA60VB -
MSH-GA80VB -
Indication of model name
MSH-GA50VB -
MSH-GA60VB -
MSH-GA80VB -
NOTE:
This service manual describes technical data of the indoor units.
As for outdoor units MUH-GA50VB -
refer to service manual OB368.
( WH )
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( WH )
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( WH )
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CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································4
4. NOISE CRITERIA CURVES ·······························5
5. OUTLINES AND DIMENSIONS ·························6
6. WIRING DIAGRAM ············································7
7. REFRIGERANT SYSTEM DIAGRAM ················8
8. SERVICE FUNCTIONS ······································9
9. TROUBLESHOOTING·······································11
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10. DISASSEMBLY INSTRUCTIONS·····················19
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11. PARTS LIST······················································21
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12. OPTIONAL PARTS···········································23
, MUH-GA60VB -
and MUH-GA80VB -
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No. OB367
,
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Table of Contents
Related Manuals for Mitsubishi Electric MSH-GA50VB
Summary of Contents for Mitsubishi Electric MSH-GA50VB
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS No. OB367 SERVICE MANUAL Wireless type Models MSH-GA50VB - ( WH ) MSH-GA60VB - ( WH ) MSH-GA80VB - ( WH ) CONTENTS 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················2 3. SPECIFICATION·················································4 4. NOISE CRITERIA CURVES ·······························5 5. -
Page 2: Technical Changes
TECHNICAL CHANGES MSH-A18WV - MSH-GA50VB - MSH-A24WV - MSH-GA60VB - MSH-A30WV - MSH-GA80VB - 1. Model name has been changed. Indication of capacity has been changed. (BTU kW) 2. Grille design has been changed. 3. Unit size has been changed.(W 1,100aoH 325aoD 227a... -
Page 3: Remote Controller
REMOTE CONTROLLER MSH-GA50VB - MSH-GA60VB - MSH-GA80VB - Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button ON/OFF WARM COOL TEMPERATURE buttons Indication of remote controller model is on back. Open the front lid. CLOCK ON/OFF WARM COOL VANE button... -
Page 4: Specification
SPECIFICATION Indoor model MSH-GA50VB - MSH-GA60VB - Cooling Cooling Heating Heating Function Single phase Single phase Power supply 230V, 50Hz 230V, 50Hz Capacity Air flow(High/Med. /Low ) 768/672 /588 K /h 768/642 /528 768/642 /528 Power outlet Running current Power input... -
Page 5: Noise Criteria Curves
NOISE CRITERIA CURVES MSH-GA50VB - MSH-GA60VB - FAN SPEED SPL(dB(A)) LINE FAN SPEED SPL(dB(A)) LINE High High Test conditions, Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19: Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19: Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5: Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:... -
Page 6: Outlines And Dimensions
OUTLINES AND DIMENSIONS MSH-GA50VB - Unit: mm MSH-GA60VB - MSH-GA80VB - INDOOR UNIT Installation plate Indoor unit 1068 414.5 414.5 Wall hole [75 Liquid line [ 6.35- 0.5m 1100 Air in Installation plate Gas line [ 12-0.43m Insulation [ 50 O.D [ 32 I.D... -
Page 7: Wiring Diagram
WIRING DIAGRAM MSH-GA50VB - MSH-GA60VB - MODELS WIRING DIAGRAM INDOOR UNIT HIC1 TO OUTDOOR RT12 UNIT CONNECTING CN112 CN201 NR11 SR141 TAB12 POWER SUPPLY CN211 CORD ELECTRONIC CONTROL ~/N 230V RT11 P.C. BOARD 50Hz DISPLAY RECEIVER CIRCUIT BREAKER P.C.BOARD P.C.BOARD... -
Page 8: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MSH-GA50VB - MSH-GA60VB - Unit:mm INDOOR UNIT INDOOR UNIT Refrigerant pipe [15.88 Refrigerant pipe [12.7 (with heat insulator) (with heat insulator) Indoor coil Indoor coil thermistor Indoor Indoor thermistor RT12 RT12 heat heat exchanger exchanger Distributor Distributor... -
Page 9: Service Functions
SERVICE FUNCTIONS MSH-GA50VB - MSH-GA60VB - MSH-GA80VB - 8-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. The time will be shortened as follows. Set time : 1 minute... - Page 10 How to release “AUTO RESTART FUNCTION” Turn off the main power for the unit. Pull out the electronic control P.C. board, the receiver P.C. board and the display P.C.board. (Refer to page 19.) Solder jumper wire to JR07 on the indoor electronic control P.C.
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Page 11: Troubleshooting
TROUBLESHOOTING MSH-GA50VB - MSH-GA60VB - MSH-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 12 9-2. Instruction of troubleshooting Start Indoor unit Indoor unit Indoor unit operates. OPERATION INDICATOR operates. doesn't receive Outdoor unit lamp on the indoor unit is Outdoor unit the signal from doesn't operate flashing on and off. doesn't remote controller. normally. operate.
- Page 13 9-3. Troubleshooting check table • The following indication applies regardless of shape of the indicator. Operation Indicator Lighted Not lighted · Flashing of the OPERATION INDICATOR lamp (on the left-hand side) indicates possible abnormalities. · The OPERATION INDICATOR lamp (on the left-hand side) is lighting during normal operation. Before taking measures, make sure that the symptom reappears, for accurate troubleshooting.
- Page 14 9-4. Trouble criterion of main parts MSH-GA50VB - MSH-GA60VB - MSH-GA80VB - Part name Check method and criterion Figure Room temperature Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C) thermistor(RT11) Normal Abnormal Indoor coil thermistor Open or short-circuit (RT12(main), RT13(sub)) 8 k"...
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Page 15: Check Of Indoor Fan Motor
9-5. Troubleshoot flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor doesn’t operate. Check of indoor fan motor Turn OFF the power supply. Check connector CN211 visually. Is soldered point of the connector Are lead wires connected? Resolder it. correctly soldered? Reconnect the lead wires. -
Page 16: Check Of Indoor Electronic Control P.c. Board
The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by press- ing the EMERGENCY OPERATION switch. Check of indoor electronic control P.C. board Check the both “parts side” and “pattern Varistor (NR11) side” of indoor electronic control P.C. board visually. -
Page 17: How To Check Mis-Wiring
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit doesn’t operate. How to check mis-wiring w Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self -check to be displayed in 3 seconds. Start •... - Page 18 9-6. Test point diagram and voltage MSH-GA50VB - MSH-GA60VB - MSH-GA80VB - Indoor electronic control P.C. board Fan motor power supply Power supply input 230V AC 5V DC Fuse (F11) 250V AC 3.15A Room temperature ther- mistor(RT11) R132 Indoor coil...
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Page 19: Disassembly Instructions
1Hold the sleeve, and 2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector MSH-GA50VB - MSH-GA60VB - MSH-GA80VB - INDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the front panel Photo 1 (1) Remove the screw caps of the front panel. - Page 20 OPERATING PROCEDURE PHOTOS Photo 3 3. Removing the electrical box Screws of the ground wire (1) Remove the front panel. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211 and CN121) and the vane motor connector (CN151) on the electronic control P.C.
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Page 21: Parts List
PARTS LIST MSH-GA50VB - (WH) MSH-GA60VB - (WH) MSH-GA80VB - (WH) 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. INDOOR UNIT HEAT EXCHANGER CATCH Optional parts SCREW (See page 23.) 11-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. -
Page 22: Electrical Parts
MSH-GA50VB - (WH) MSH-GA60VB - (WH) MSH-GA80VB - (WH) 11-4. ACCESSORY AND 11-3. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS SLEEVE BEARING ROOM TEMPERATURE THERMISTOR 15 16 VARISTOR FUSE 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. -
Page 23: Optional Parts
Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. DO NOT reuse AIR CLEANING FILTER even if it is washed. DO NOT remove or attach AIR CLEANING FILTER during unit operation. Model Part No. MSH-GA50VB - MSH-GA60VB - MAC-1700FT MSH-GA80VB - Air cleanig filter (White bellows type) - Page 24 HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD New publication, effective Oct. 2004 Distributed in Oct. 2004. No.OB367 6 Specifications subject to change without notice. Made in Japan...