Revision D: • Parts numbers of indoor fan motor and motor band have been changed. • Some descriptions have been modified. SPLIT-TYPE AIR CONDITIONERS Please void OB367 REVISED EDITION-C. INDOOR UNIT No. OB367 SERVICE MANUAL REVISED EDITION-D Models MSH-GA50VB MSH-GA60VB MSH-GA80VB - E1 E1 E1 Outdoor unit service manual MUH-GA•VB Series (OB368) CONTENTS 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················3 3.
Use the specified refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. Revision A: •RoHS PARTS LIST has been added.
2 PART NAMES AND FUNCTIONS MSH-GA50VB MSH-GA60VB MSH-GA80VB Air cleaning filter (option) (White bellows type) Grille 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 (When the grille is opened) Operation indicator lamp Emergency operation switch Remote control receiving section ACCESSORIES 1 2 3 4 5 6 7 MSH-GA50VB MSH-GA60VB MSH-GA80VB 1 7 1 2 2 1 1 Inst
REMOTE CONTROLLER MSH-GA50VB MSH-GA60VB MSH-GA80VB Signal transmitting section Operation display section PM OPERATE /STOP (ON /OFF)button AM TOO ON/OFF WARM TOO COOL TEMPERATURE buttons Indication of remote controller model is on back. Open the front lid. CLOCK PM AM TOO ON/OFF WARM VANE button (Horizontal vane button) TOO COOL FAN STOP VANE START I FEEL COOL FAN SPEED CONTROL button OFF-TIMER button HEAT DRY ON-TIMER button MODE WIDE VANE HR.
3 SPECIFICATION Indoor model MSH-GA50VB Power supply Electrical data Fan motor Special remarks K /h A A W % A " mm kg dB rpm k" k" Heating Single phase 230V, 50Hz 768/642/528 10 0.3 60 87 0.
NOISE CRITERIA CURVES 4 MSH-GA50VB MSH-GA60VB FAN SPEED SPL(dB(A)) High FAN SPEED SPL(dB(A)) LINE High 42 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 10 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 63 125 NC-20 250 500 1000 2000 4000 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 10 8000 45 Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19: Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.
5 OUTLINES AND DIMENSIONS MSH-GA50VB MSH-GA60VB MSH-GA80VB Unit: mm Installation plate Indoor unit 7.5 173 98 414.5 414.5 173 47 2.5 47 255.5 1068 315 98 Wall hole [75 258 1100 Air in 5 Installation plate { 325 { 791 56 253 Air out 19 159 58 OB367D Drain hose [16 (Connected part O.D) Insulation [28 Power supply cord Lead to right 2.0m Lead to left 1.0m Wireless remote controller Downloaded from AC-Manual.com Manuals Liquid line [ 6.35- 0.5m Gas line [ 12-0.
6 WIRING DIAGRAM MSH-GA50VB MSH-GA60VB TO OUTDOOR UNIT CONNECTING 12V HIC1 3 TB POWER SUPPLY CORD ~/N 230V 50Hz L NR11 3 2 1 BLU CN 151 BRN BLU CN 102 15 BLK GRY YLW BRN WHT RED 3 CN 121 C11 1 F11 TAB12 BRN RT12 CN112 CN201 RED N 2 1 SR141 CN211 ELECTRONIC CONTROL CN P.C. BOARD 111 CN 101 3 3 4 1 2 3 4 5 6 MF RT11 3 PE MV2 MV2 MV1 GRN/YLW CIRCUIT BREAKER SYMBOL DISPLAY P.C.BOARD RECEIVER P.C.
7 REFRIGERANT SYSTEM DIAGRAM MSH-GA50VB MSH-GA60VB Unit:mm Refrigerant pipe [15.88 (with heat insulator) Refrigerant pipe [12.7 (with heat insulator) Indoor coil thermistor RT12 Distributor Indoor heat exchanger Indoor heat exchanger Flared connection Room temperature thermistor RT11 Indoor coil thermistor RT12 Distributor Room temperature thermistor RT11 Flared connection Flared connection Refrigerant pipe [6.35 (with heat insulator) Refrigerant pipe [6.
8 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 ➔ 1-second Set time : 3 minute ➔ 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit of JPG and JPS.) 8-2. P.C.
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. However if the unit is operated in “I FEEL CONTROL” mode before power failure, the operation is not memorized.
9 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.
9-2. Instruction of troubleshooting Start Indoor unit operates. Outdoor unit does not operate normally. Indoor unit operates. Outdoor unit does not operate. Outdoor unit does not operate even in Test Run operation.w Outdoor unit operates only in Test Run operation.w Check room temperature thermistor. Refer to 9-6. "Test point diagram and voltage". Refer to "Check of outdoor unit". Flash on and off at 0.
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. Self check table No. Abnormal point Operation indicator lamp 0.
9-4. Trouble criterion of main parts MSH-GA50VB MSH-GA60VB MSH-GA80VB Part name Room temperature thermistor(RT11) Check method and criterion Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C) Figure Indoor coil thermistor Refer to 9-6."Test point diagram and voltage", (RT12(main), RT13(sub)) "Indoor electronic control P.C. board", for the chart of thermistor.
9-5. Troubleshooting flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor does not operate. A Check of indoor fan motor Turn OFF the power supply. Check connector CN211 visually. No Yes Are lead wires connected? Is soldered point of the connector correctly soldered? No Resolder it. Yes Reconnect the lead wires. Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board. Measure resistance between lead wires No.3 and No.4 and then No.1 and No.4.
The unit does not operate with the remote controller. Also, the OPERATION INDICATOR lamp does not light up by pressing the EMERGENCY OPERATION switch. C Check of indoor electronic control P.C. board Check the both “parts side” and “pattern side” of indoor electronic control P.C. board visually. Varistor (NR11) Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply.
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. D 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 • Turn ON the power supply. (indoor/ outdoor unit) • Press EMERGENCY OPERATION switch once. After 3 minutes, mis-wiring is indicated (0.5-second ON, 0.5-second OFF) on OPERATION INDICATOR lamp on indoor unit.w Yes Correct them.
9-6. Test point diagram and voltage MSH-GA50VB MSH-GA60VB MSH-GA80VB Indoor electronic control P.C. board w There are 2 types of electronic control P.C. boards (TYPE1/TYPE2). They are both compatible with MSH-GA50/60/80VB. TYPE 1 Fan motor power supply (CN211) } Power supply input 230 VAC + } 5 VDC Room temperature thermistor(RT11) Indoor coil thermistor(RT12 (main)) MSH-GA80VB Indoor coil thermistor(RT13 (sub)) Fuse (F11) T3.
MSH-GA50VB MSH-GA60VB MSH-GA80VB Indoor electronic control P.C. board TYPE 2 Fan motor power supply (CN211) } + Fuse (F11) { } 5 VDC Room temperature thermistor (RT11) Indoor coil thermistor (RT12 (main)) R132 12 VDC Power supply input 230 VAC MSH-GA80VB Indoor coil thermistor (RT13 (sub)) + CN121 Vane motor power supply (CN151) To disable “Auto restart function”, solder the jumper wire to JR07. (Refer to 8-3.) Emergency operation switch Timer short mode point (JPS, JPG) (Refer to 8-1.
10 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. Check the shape of the terminal before detaching. (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism.
OPERATING PROCEDURE PHOTOS 3. Removing the electrical box (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. board. (5) Remove the screws of earth wire. (6) Remove the fan motor lead wire and indoor coil thermistor from the electrical box.
11 PARTS LIST (non-RoHS compliant) MSH-GA50VB MSH-GA60VB MSH-GA80VB 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. INDOOR UNIT HEAT EXCHANGER 1 2 10 3 4 8 5 Optional parts (See 13.) 11 12 6 7 11-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. NO. 1 2 3 4 5 6 7 8 9 Part No.
PARTS LIST (non-RoHS compliant) MSH-GA50VB MSH-GA60VB MSH-GA80VB 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 1 21 11-4. ACCESSORY AND REMOTE CONTROLLER 20 24 2 3 25 12 4 11 19 13 5 6 15 14 10 7 8 9 18 16 17 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. NO. 1 2 3 4 5 6 7 8 9 10 11 Part No.
12 RoHS PARTS LIST (RoHS compliant) MSH-GA50VB MSH-GA60VB MSH-GA80VB 12-1. INDOOR UNIT STRUCTURAL PARTS 12-2. INDOOR UNIT HEAT EXCHANGER 1 2 10 3 4 8 5 Optional parts (See 13.) 11 12 6 7 12-1. INDOOR UNIT STRUCTURAL PARTS NO. RoHS Part number that is circled is not shown in the illustration. 1 2 3 4 5 6 7 8 9 G G G G G G G G G Part No.
RoHS PARTS LIST (RoHS compliant) MSH-GA50VB MSH-GA60VB MSH-GA80VB 12-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 1 21 12-4. ACCESSORY AND REMOTE CONTROLLER 20 24 25 2 3 12 4 11 19 13 5 6 15 14 10 7 8 9 18 16 17 12-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS NO. RoHS Part numbers that are circled are not shown in the illustration. 1 2 3 4 5 6 7 8 9 10 11 G G G G G G G G G G G Part No.
13 OPTIONAL PARTS AIR CLEANING FILTER ● ● ● ● 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. 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.
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN 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 Distributed in Oct. 2004. No.OB367 6 Made in Japan Downloaded from AC-Manual.com Manuals New publication, effective Jan.
