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SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Wireless type
Models
MS-GA50VB -
MS-GA60VB -
MS-GA80VB -
Indication of model name
MS-GA50VB -
MS-GA60VB -
MS-GA80VB -
NOTE:
This service manual describes technical data of the indoor units.
As for outdoor units MU-GA50VB -
refer to service manual OB370.
( WH )
E1
( WH )
E1
( WH )
E1
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
E1
10. DISASSEMBLY INSTRUCTIONS·····················19
E1
11. PARTS LIST······················································21
E1
12. OPTIONAL PARTS···········································23
, MU-GA60VB -
and MU-GA80VB -
E1
E1
No. OB369
,
E1
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Table of Contents
Related Manuals for Mitsubishi Electric MS-GA50VB E1 WH
Summary of Contents for Mitsubishi Electric MS-GA50VB E1 WH
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Page 1: Table Of Contents
SPLIT-TYPE, AIR CONDITIONERS No. OB369 SERVICE MANUAL Wireless type Models MS-GA50VB - ( WH ) MS-GA60VB - ( WH ) MS-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 MS-A18WV - MS-GA50VB - MS-A24WV - MS-GA60VB - MS-A30WV - MS-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 W1,100aoH 325aoD 258a) PART NAMES AND FUNCTIONS INDOOR UNIT... -
Page 3: Remote Controller
REMOTE CONTROLLER MS-GA50VB - MS-GA60VB - MS-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 STOP (Horizontal vane button) -
Page 4: Specification
SPECIFICATION Indoor model MS-GA50VB - MS-GA60VB - Cooling Cooling 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 Power outlet Running current 0.30 0.30 Power input — Auxiliary heater A(kW) —... -
Page 5: Noise Criteria Curves
NOISE CRITERIA CURVES MS-GA50VB - MS-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: NC-70 NC-70 NC-60 NC-60 NC-50 NC-50... -
Page 6: Outlines And Dimensions
OUTLINES AND DIMENSIONS MS-GA50VB - Unit: mm MS-GA60VB - MS-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 for MS-GA50VB Liquid line [ 9.52- 0.5m... -
Page 7: Wiring Diagram
WIRING DIAGRAM MS-GA50VB - MS-GA60VB - MODELS WIRING DIAGRAM INDOOR UNIT TO OUTDOOR UNIT CN202 CONNECTING HIC1 RT12 CN112 CN201 NR11 SR141 TAB12 POWER SUPPLY CN211 CORD ELECTRONIC CONTROL ~/N 230V RT11 P. C. BOARD 50Hz CIRCUIT RECEIVER DISPLAY BREAKER P. -
Page 8: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MS-GA50VB - MS-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 heat RT12 heat exchanger exchanger Distributor Distributor Flared connection Flared connection Room temperature... -
Page 9: Service Functions
SERVICE FUNCTIONS MS-GA50VB - MS-GA60VB - MS-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 3-second (It takes 3 minutes for the compressor to start operation. - Page 10 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. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure.Then, the unit will restart automatically.
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Page 11: Troubleshooting
TROUBLESHOOTING MS-GA50VB - MS-GA60VB - MS-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 lighted during normal operation. Before taking measures, make sure that the symptom reappears, for accurate troubleshooting.
- Page 14 9-4. Trouble criterion of main parts MS-GA50VB - MS-GA60VB - MS-GA80VB - Figure Part name Check method and criterion 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 8 k"...
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Page 15: A 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 MS-GA80VB 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 MS-GA50VB - MS-GA60VB - MS-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 thermistor(RT12(main)) MS-GA80VB Indoor coil...
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Page 19: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS <"Terminal with lock mechanism" Detaching points> In case of terminal with lock mechanism, detach the terminal as shown below. There are two types ( Refer to (1) and (2)) of the terminal with lock mechanism. The terminal with no lock mechanism can be removed by pulling it out. Check the shape of the terminal and work. - 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 MS-GA50VB - (WH) MS-GA60VB - (WH) MS-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. Q'ty/unit Symbol MS-GA50... -
Page 22: Electrical Parts
MS-GA50VB - (WH) MS-GA60VB - (WH) MS-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. Q'ty/unit Symbol MS-GA50... -
Page 23: Optional Parts
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 24 HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Oct. 2004. No.OB369 6 New publication, effective Oct. 2004 Made in Japan Specifications subject to change without notice.
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