Table of Contents
Advertisement
Quick Links
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Wireless type
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).
All manuals and user guides at all-guides.com
E1
E1
E1
Revision A:
•RoHS PARTS LIST has been corrected.
Please void OB367 REVISED EDITION-A.
REVISED EDITION-B
Outdoor unit service manual
MUH-GA•VB Series (OB368)
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
10. DISASSEMBLY INSTRUCTIONS·····················19
11. PARTS LIST······················································21
12. RoHS PARTS LIST···········································23
13. OPTIONAL PARTS···········································25
No. OB367
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Mitsubishi Electric MUH-GA-VB Series
Summary of Contents for Mitsubishi Electric MUH-GA-VB Series
-
Page 1: Table Of Contents
All manuals and user guides at all-guides.com Revision A: •RoHS PARTS LIST has been corrected. SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS Please void OB367 REVISED EDITION-A. INDOOR UNIT No. OB367 SERVICE MANUAL REVISED EDITION-B Wireless type Models MSH-GA50VB - MSH-GA60VB - MSH-GA80VB - Outdoor unit service manual MUH-GA•VB Series (OB368) -
Page 2: Technical Changes
All manuals and user guides at all-guides.com Revision A: •RoHS PARTS LIST has been added. Revision B: •RoHS PARTS LIST has been corrected. 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. - Page 3 All manuals and user guides at all-guides.com 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...
-
Page 4: Specification
All manuals and user guides at all-guides.com 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 Power outlet Running current Power input Power factor Fan motor current 0.30... -
Page 5: Noise Criteria Curves
All manuals and user guides at all-guides.com 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: NC-70... -
Page 6: Outlines And Dimensions
All manuals and user guides at all-guides.com 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 7: Wiring Diagram
All manuals and user guides at all-guides.com 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... -
Page 8: Refrigerant System Diagram
All manuals and user guides at all-guides.com 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... -
Page 9: Service Functions
All manuals and user guides at all-guides.com 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 1-second Set time : 3 minute... - Page 10 All manuals and user guides at all-guides.com 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.
-
Page 11: Troubleshooting
All manuals and user guides at all-guides.com 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 12 All manuals and user guides at all-guides.com 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.
- Page 13 All manuals and user guides at all-guides.com 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.
- Page 14 All manuals and user guides at all-guides.com 9-4. Trouble criterion of main parts MSH-GA50VB MSH-GA60VB MSH-GA80VB Part name Check method and criterion Figure Measure the resistance with a tester. Room temperature (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.
- Page 15 All manuals and user guides at all-guides.com 9-5. Troubleshooting 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.
- Page 16 All manuals and user guides at all-guides.com 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”...
- Page 17 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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...
-
Page 19: Disassembly Instructions
All manuals and user guides at all-guides.com 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 (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. - Page 20 All manuals and user guides at all-guides.com 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.
-
Page 21: Parts List
All manuals and user guides at all-guides.com 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... - Page 22 All manuals and user guides at all-guides.com 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 15 16 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring...
-
Page 23: Rohs Parts List
All manuals and user guides at all-guides.com 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... - Page 24 All manuals and user guides at all-guides.com 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 15 16 12-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring...
-
Page 25: Optional Parts
All manuals and user guides at all-guides.com OPTIONAL PARTS AIR CLEANING FILTER AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. Normal life of AIR CLEANING FILTER is 4 months. However, when it becomes dirty, replace it as soon as possible. Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. - Page 26 All manuals and user guides at all-guides.com...
- Page 27 All manuals and user guides at all-guides.com...
- Page 28 All manuals and user guides at all-guides.com HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2007. No.OB367 REVISED EDITION-B 6 Distributed in May 2006. No.OB367 REVISED EDITION-A 6 New publication, effective May 2007 Distributed in Oct.
Need help?
Do you have a question about the MUH-GA-VB Series and is the answer not in the manual?
Questions and answers