Table of Contents
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SPLIT-TYPE AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Models
MSH-GA50VB -
MSH-GA60VB -
MSH-GA80VB -
NOTE:
This service manual describes technical data of the indoor 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).
Downloaded from AC-Manual.com Manuals
Revision D:
• Parts numbers of indoor fan motor and
motor band have been changed.
• Some descriptions have been modified.
Please void OB367 REVISED EDITION-C.
E1
E1
E1
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES ·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM ················9
8. SERVICE FUNCTIONS ····································10
9. TROUBLESHOOTING······································12
10. DISASSEMBLY INSTRUCTIONS·····················21
11. PARTS LIST······················································23
12. RoHS PARTS LIST···········································25
13. OPTIONAL PARTS···········································27
No. OB367
REVISED EDITION-D
Outdoor unit service manual
MUH-GA•VB Series (OB368)
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi MSH-GA50VB
Summary of Contents for Mitsubishi MSH-GA50VB
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Page 1: Table Of Contents
• Some descriptions have been modified. Please void OB367 REVISED EDITION-C. INDOOR UNIT No. OB367 SERVICE MANUAL REVISED EDITION-D Models MSH-GA50VB - MSH-GA60VB - MSH-GA80VB - Outdoor unit service manual MUH-GA•VB Series (OB368) CONTENTS 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················3 3. -
Page 2: Technical Changes
Revision D: • Parts numbers of indoor fan motor and motor band have been changed. • Some descriptions have been modified. TECHNICAL CHANGES MSH-A18WV - MSH-GA50VB - MSH-A24WV - MSH-GA60VB - MSH-A30WV - MSH-GA80VB - 1. Model name has been changed. -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS MSH-GA50VB MSH-GA60VB Air cleaning filter (option) MSH-GA80VB Grille (White bellows type) Air inlet To breaker Front panel Power supply cord Catechin air filter Remote control receiving section Vertical vanes Horizontal vane Remote controller Operation section Display section... - Page 4 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 FAN SPEED CONTROL button...
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Page 5: 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) K /h 768/642/528 768/672/588 768/642/528 Breaker capacity Running current Power input Power factor Fan motor current 0.30... -
Page 6: 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 7: Outlines And Dimensions
OUTLINES AND DIMENSIONS MSH-GA50VB Unit: mm MSH-GA60VB MSH-GA80VB 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 for MSH-GA50/60VB Liquid line [ 9.52- 0.5m... -
Page 8: Wiring Diagram
WIRING DIAGRAM MSH-GA50VB MSH-GA60VB 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 REMOTE CONTROLLER SYMBOL SYMBOL NAME NAME SYMBOL... -
Page 9: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MSH-GA50VB MSH-GA60VB Unit:mm 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 Flared connection Flared connection Room temperature... -
Page 10: 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. (Refer to 9-6.) Set time : 1 minute... - Page 11 8-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shutoff of the main power.
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Page 12: 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 turn OFF the main unit first with the remote controller, and then after confirming the horizontal vane is closed, turn OFF the breaker and / or disconnect the power plug. - Page 13 9-2. Instruction of troubleshooting Start Indoor unit Indoor unit Indoor unit operates. OPERATION INDICATOR operates. does not receive Outdoor unit lamp on the indoor unit is Outdoor unit the signal from does not operate flashing on and off. does not remote controller.
- Page 14 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 15 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) Indoor coil thermistor Refer to 9-6."Test point diagram and voltage", (RT12(main), RT13(sub)) "Indoor electronic control P.C.
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Page 16: Troubleshooting Flow
9-5. Troubleshooting flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor does not 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 17 The unit does not operate with the remote controller. Also, the OPERATION INDICATOR lamp does not light up by pressing the EMERGENCY OPERATION switch. Check of indoor electronic control P.C. board Check the both “parts side” and “pattern Varistor (NR11) side”...
- Page 18 When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not 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 19 9-6. Test point diagram and voltage w There are 2 types of electronic control P.C. boards MSH-GA50VB MSH-GA60VB MSH-GA80VB (TYPE1/TYPE2). Indoor electronic control P.C. board They are both compatible with MSH-GA50/60/80VB. TYPE 1 Fan motor power supply (CN211) Power supply input...
- Page 20 MSH-GA50VB MSH-GA60VB MSH-GA80VB Indoor electronic control P.C. board TYPE 2 Fan motor power supply (CN211) Power supply input 230 VAC Fuse (F11) 5 VDC Room temperature thermistor (RT11) R132 Indoor coil thermistor (RT12 (main) MSH-GA80VB Indoor coil thermistor (RT13 (sub)
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Page 21: Disassembly Instructions
Locking lever lever. Connector 10-1. MSH-GA50VB MSH-GA60VB MSH-GA80VB NOTE: Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the front panel Photo 1 (1) Remove the screw caps of the front panel. - Page 22 OPERATING PROCEDURE PHOTOS Photo 3 3. Removing the electrical box Screws of the earth 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 23: Parts List
PARTS LIST (non-RoHS compliant) MSH-GA50VB MSH-GA60VB MSH-GA80VB 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. INDOOR UNIT HEAT EXCHANGER Optional parts (See 13.) 11-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. - Page 24 PARTS LIST (non-RoHS compliant) MSH-GA50VB MSH-GA60VB MSH-GA80VB 11-4. ACCESSORY AND 11-3. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS 16 17 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration.
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Page 25: Rohs Parts List
RoHS PARTS LIST (RoHS compliant) MSH-GA50VB MSH-GA60VB MSH-GA80VB 12-1. INDOOR UNIT STRUCTURAL PARTS 12-2. INDOOR UNIT HEAT EXCHANGER Optional parts (See 13.) 12-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. - Page 26 RoHS PARTS LIST (RoHS compliant) MSH-GA50VB MSH-GA60VB MSH-GA80VB 12-4. ACCESSORY AND 12-3. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS 16 17 12-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration.
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Page 27: 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 cleaning filter (White bellows type) OB367D Downloaded from AC-Manual.com Manuals... - Page 28 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2007 MITSUBISHI ELECTRIC CORPORATION Distributed in Jan. 2012. No.OB367 REVISED EDITION-D Distributed in Aug. 2011. No.OB367 REVISED EDITION-C Distributed in May 2007. No.OB367 REVISED EDITION-B 6 Distributed in May 2006. No.OB367 REVISED EDITION-A 6 New publication, effective Jan.