Table of Contents
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA -
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
Revision:C
• PARTS LIST and RoHS PARTS LIST have been
changed.
Please void OB388 REVISED EDITION-B
E1
E1
E1
Outdoor unit service manual
MUZ-GA•VA Series (OB389)
MXZ-A•VA Series (OB377)
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·····················24
11. PARTS LIST······················································27
12. RoHS PARTS LIST···········································28
13. OPTIONAL PARTS···········································30
No. OB388
REVISED EDITION-C
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi MSZ-GA50VA
Summary of Contents for Mitsubishi MSZ-GA50VA
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS Please void OB388 REVISED EDITION-B INDOOR UNIT No. OB388 SERVICE MANUAL REVISED EDITION-C Wireless type Models MSZ-GA50VA - MSZ-GA60VA - MSZ-GA71VA - Outdoor unit service manual MUZ-GA•VA Series (OB389) MXZ-A•VA Series (OB377) CONTENTS 1. TECHNICAL CHANGES ····································2 2. -
Page 2: Technical Changes
• 9-2. Failure mode recall function has been changed. Revision:C • PARTS LIST and RoHS PARTS LIST have been changed. TECHNICAL CHANGES MSZ-A18YV - MSZ-GA50VA - MSZ-A24YV - MSZ-GA60VA - MSZ-A26YV - MSZ-GA71VA - 1. Indication of capacity has been changed.(BTU base kW base) 2. -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA Air cleaning filter (option) Grille (Anti-allergy enzyme filter:blue bellows type) Air inlet Catechin air filter Remote control receiving section Vertical vanes Horizontal vane Remote controller Operation section Display section (When the grille is opened) -
Page 4: Remote Controller
REMOTE CONTROLLER MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 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. WIDE VANE button (Vertical vane button) FAN SPEED CONTROL button... -
Page 5: Specification
SPECIFICATION Indoor model MSZ-GA50VA MSZ-GA60VA Cooling Heating Function Cooling Heating Single phase Single phase Power supply 230V, 50Hz 230V, 50Hz Capacity Air flow(High/Med./Low) 852/690/498 K /h 1,032/768/522 1,032/786/522 Power outlet Running current 1 0.45 0.60 Power input 1 Power factor 1 Fan motor current 1 0.45... -
Page 6: Noise Criteria Curves
Specifications and rating conditions of main electric parts (F11) T3.15AL 250V Fuse (MV1/ MV2) MP20/MP20 Vane motor (NR11) Varistor ERZV14D471 (TB) Terminal block NOISE CRITERIA CURVES MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA FAN SPEED SPL(dB(A)) LINE FAN SPEED SPL(dB(A)) LINE High High Test conditions Test conditions... -
Page 7: Outlines And Dimensions
OUTLINES AND DIMENSIONS MSZ-GA50VA Unit: mm MSZ-GA60VA MSZ-GA71VA 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 MSZ-GA50/60VA Liquid line [ 9.52- 0.5m... -
Page 8: Wiring Diagram
WIRING DIAGRAM MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA INDOOR ELECTRONIC CONTROL P.C. BOARD RT13 TAB3 230V~ RT12 DB111 T111 TO OUTDOOR UNIT RT11 12-24V NR11 CONNECTING CN201 LD104 CN211 105(T) POWER MONITOR RECEIVER SW P.C. MV2 MV2 P.C.BOARD P.C.BOARD BOARD REMOTE CONTROLLER SYMBOL... -
Page 9: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MSZ-GA50VA MSZ-GA60VA 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(main) heat RT12(main) heat exchanger exchanger Distributor Distributor Flared connection Flared connection Indoor coil... -
Page 10: Service Functions
SERVICE FUNCTIONS MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 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 11 Operation If the main power has been cut, the operation settings remain. After the power is restored, the unit restarts automatically according to the memory.(However, it takes at least 3 minutes for the compressor to start running.) How to release “AUTO RESTART FUNCTION” Turn OFF the main power for the unit.
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Page 12: Troubleshooting
TROUBLESHOOTING MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 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 of 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: Failure Mode Recall Function
9-2. Failure mode recall function Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (9-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur. - Page 14 2. Indoor unit failure mode table Left lamp of Abnormal point OPERATION Condition Correspondence (Failure mode) INDICATOR lamp Not lighted Normal – – When the room temperature thermistor Room temperature Refer to the characteristics of the room 1-time flash short or open circuit is detected every 8 thermistor temperature thermistor (9-7.).
- Page 15 9-3. Instruction of troubleshooting Start Indoor unit Indoor unit Indoor unit operates. OPERATION INDICATOR operates. doesn't receive Outdoor unit doesn't lamp on the indoor unit is Outdoor unit the signal from operate normally. flashing on and off. doesn't remote controller. operate.
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Page 16: Troubleshooting Check Table
9-4. Troubleshooting check table Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and the following detection method has detected an abnormality (the first detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing. - Page 17 2.5-second OFF setting priority. operate. 9-5. Trouble criterion of main parts MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA Part name Check method and criterion Figure Room temperature Measure the resistance with a tester. thermistor(RT11) Refer to 9-7.
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Page 18: Troubleshooting Flow
9-6. Troubleshooting flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan does not operate. Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan doesn't operate. Turn OFF the power supply. Pay careful attention to the high voltage on the fan motor connector CN211. -
Page 19: Check Of Remote Controller And Receiver P.c. Board
Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller. Check of remote controller and receiver P.C. board wCheck if the remote controller is exclusive for this air conditioner. Press OPERATE/STOP(ON/OFF) but- ton on the remote controller. Is LCD display on the the remote Replace the batteries. - Page 20 The unit does not operate with the remote controller. Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch. Check of indoor electronic control P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 and Measure the resistance between CN211 3 Short/open circuit: and 4 of the indoor fan motor connector.
- Page 21 • When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate. • When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. How to check mis-wiring and serial signal error (when outdoor unit does not work) Turn OFF the power supply.
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Page 22: Electromagnetic Noise Enters Into Tv Sets Or Radios
Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the Extend the distance between antennas and the indoor the antennas and the indoor unit within 3m, or is the unit, and/or the antennas and distance between the the outdoor unit. - Page 23 9-7. Test point diagram and voltage MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA Indoor electronic control P.C. board Release of Auto restart Power supply input function Varistor (NR11) 230V AC Fuse(F11) Solder the Jumper wire to JR07 Cement resistor (Refer to 8-3.) (R111) Indoor fan motor...
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Page 24: Disassembly Instructions
2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA OPERATING PROCEDURE PHOTOS 1. Removing the front panel Photo 1 (1) Remove the screw caps of the front panel. Front panel Remove the screws. - Page 25 OPERATING PROCEDURE PHOTOS Indoor coil Screw of the 3. Removing the electrical box Photo 3 thermistors 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 thermistors. (4) Disconnect the motor connector (CN211) and the vane motor connector (CN151 and CN152) on the electronic control P.C.
- Page 26 PARTS LIST (non-RoHS compliant) MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 11-2. INDOOR UNIT HEAT EXCHANGER 11-1. INDOOR UNIT STRUCTURAL PARTS 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.
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Page 27: Parts List
PARTS LIST (non-RoHS compliant) MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 11-4. ACCESSORY AND 11-3. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit... -
Page 28: Rohs Parts List
RoHS PARTS LIST (RoHS compliant) MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 12-2. INDOOR UNIT HEAT EXCHANGER 12-1. INDOOR UNIT STRUCTURAL PARTS 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 29 RoHS PARTS LIST (RoHS compliant) MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 12-4. ACCESSORY AND 12-3. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS 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 30: Optional Parts
3 months. Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. Do not remove or attach AIR CLEANING FILTER during unit operation. Model Part No. MSZ-GA50VA MSZ-GA60VA MAC-2300FT MSZ-GA71VA Air cleaning filter... - Page 32 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jan. 2007. No.OB388 REVISED EDITION-C 6 Distributed in May 2006. No.OB388 REVISED EDITION-B 6 Distributed in Sep. 2006. No.OB388 REVISED EDITION-A 6 New publication, effective Jan.