OB419A.qxp 06.6.5 11:08 AM Page 1 Revision:A SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS ● MSZ-GA80VA- A1 has been added. ● 9-2. Failure mode recall function has been changed. ● RoHS PARTS LIST has been added. Please void OB419. INDOOR UNIT No. OB419 SERVICE MANUAL REVISED EDITION-A Wireless type Models MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA - A1 A1 A1 A1 Outdoor unit service manual MUZ-GA·VA series (OB442) MXZ-A·VA series (OB447) MXZ-8A140VA1 (OC316) CONTENTS 1.
OB419A.qxp 06.6.5 11:08 AM Page 2 Revision:A • MSZ-GA80VA- A1 model has been added. • 9-2. Failure mode recall function has been changed. • RoHS PARTS LIST has been added. 1 TECHNICAL CHANGES MSZ-A18YV MSZ-A24YV MSZ-A26YV MSZ-A30YV 1. 2. 3. 4. 5. 6. - A1 - A1 - A1 - A1 ➔ MSZ-GA50VA ➔ MSZ-GA60VA ➔ MSZ-GA71VA ➔ MSZ-GA80VA - A1 - A1 - A1 - A1 Indication of capacity has been changed.(BTU base ➔kW base) Power supply cord has been removed. Indoor electronic control P.C. board has been changed.
OB419A.qxp 06.6.
OB419A.qxp 06.6.5 11:08 AM Page 4 REMOTE CONTROLLER MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button TOO ON/OFF WARM TOO COOL TEMPERATURE buttons Indication of remote controller model is on back. Open the front lid.
06.6.5 11:08 AM 3 Page 5 SPECIFICATION Indoor model Function Power supply Special remarks Electrical data Capacity Air flow(High/Med./Low) K /h Power outlet A Running current ✽1 A Power input ✽1 W Power factor ✽1 % Fan motor current ✽1 A Fan motor Model Dimensions WOHOD mm Weight kg Air direction Sound level(High/Med./Low) dB Fan speed(High/Med./Low) rpm Fan speed regulator Remote controller model MSZ-GA50VA Cooling Heating Single phase 230V, 50Hz 852/690/498 20 0.45 50 48 0.
OB419A.qxp 06.6.5 11:08 AM Page 6 Specifications and rating conditions of main electric parts (F11) Fuse (MV1/ MV2) Vane motor MP20/MP20 (NR11) Varistor ERZV14D471 (TB) Terminal block 4 T3.
06.6.5 11:08 AM 5 Page 7 OUTLINES AND DIMENSIONS MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA 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 { Liquid line [ 6.35- 0.5m Gas line [ 12-0.43m Insulation [ 50 O.D [ 32 I.D for MSZ-GA50/60VA Liquid line [ 9.52- 0.5m Gas line [ 12-0.43m Insulation [ 50 O.D [ 32 I.
OB419A.qxp 06.6.5 11:08 AM 6 Page 8 WIRING DIAGRAM MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA TB 230V~ S1 S2 TO OUTDOOR UNIT CONNECTING S3 12-24V TAB3 F11 BLK INDOOR ELECTRONIC CONTROL P.C. BOARD DB111 BLU RED 2 1 4 CN 111 NR11 1 2 3 4 5 6 GRN LD104 5 CN 151 5 MV2 MV2 MV1 SYMBOL CN 101 5 LD 105(T) 3 POWER MONITOR P.C.BOARD NAME RT12 1 T111 CN201 CN 152 RT13 CN 3 112 2 RT11 RED BLK 5 WHT YLW BLU MF CN211 2 3 RECEIVER P.C.BOARD REMOTE CONTROLLER SW P.C.
OB419A.qxp 06.6.5 11:08 AM 7 Page 9 REFRIGERANT SYSTEM DIAGRAM MSZ-GA50VA MSZ-GA60VA Unit:mm Refrigerant pipe [15.88 (with heat insulator) Refrigerant pipe [12.
OB419A.qxp 06.6.5 11:09 AM 8 Page 10 SERVICE FUNCTIONS MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA 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. However, the starting time is shortened by short circuit of JPG and JPS.) 8-2. P.C.
06.6.5 11:09 AM Page 11 Operation 1If the main power has been cut, the operation settings remain. 2After 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” 1Turn OFF the main power for the unit. 2Pull out the electronic control P.C. board, the receiver P.C. board and the display P.C.board. (Refer to 10.2.
OB419A.qxp 9 06.6.5 11:09 AM Page 12 TROUBLESHOOTING MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA 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.
OB419A.qxp 06.6.5 11:09 AM Page 13 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. 1. Flow chart of failure mode recall function for the indoor/outdoor unit.
OB419A.qxp 06.6.5 11:09 AM Page 14 2. Indoor unit failure mode table Left lamp of OPERATION INDICATOR lamp Abnormal point (Failure mode) Condition Correspondence Not lighted Normal – – 1-time flash every 0.5-second Room temperature thermistor When the room temperature thermistor short or open circuit is detected every 8 seconds during operation. Refer to the characteristics of the room temperature thermistor (9-7.). 2-time flash 2.
OB419A.qxp 06.6.5 11:09 AM Page 15 9-3. Instruction of troubleshooting Start Indoor unit operates. Outdoor unit doesn't operate. Outdoor unit operates only in Test Run operation. w Check room temperature thermistor. Refer to 9-7. "Test point diagram and voltage". Indoor unit operates. Outdoor unit doesn't operate normally. Indoor unit doesn't receive the signal from remote controller. OPERATION INDICATOR lamp on the indoor unit is flashing on and off.
OB419A.qxp 06.6.5 11:09 AM Page 16 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.
OB419A.qxp 06.6.5 11:09 AM Page 17 Lighted · Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates abnormality. · OPERATION INDICATOR lamp (left-hand side lamp) is lighted. Blinking Not Lighted No. Abnormal point 1 MXZ type Operation mode setting Operation indicator lamp Right lamp flash 2.5-second OFF Symptom Condition Outdoor unit operates but indoor unit does not operate.
OB419A.qxp 06.6.5 11:09 AM Page 18 9-6. Troubleshoot flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan does not operate. A 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.
OB419A.qxp 06.6.5 11:09 AM Page 19 Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller. B Check of remote controller and receiver P.C. board wCheck if the remote controller is exclusive for this air conditioner. Switch ON the remote controller. Is LCD display on the the remote controller visible? No Replace the batteries. (Refer to 9-1.4.) (not clear) Yes Remove the batteries, then set them back and press RESET button. (Refer to 9-1.4.
OB419A.qxp 06.6.5 11:09 AM Page 20 The unit does not operate with the remote controller. Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch. C Check of indoor electronic control P.C. board and indoor fan motor 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. Measure the resistance between CN211 3 and 4 of the indoor fan motor connector.
OB419A.qxp 06.6.5 11:09 AM 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. D How to check mis-wiring and serial signal error (when outdoor unit does not work) Turn OFF the power supply. Is there rated voltage in the power supply? No Check the power supply. Yes Turn ON the power supply.
OB419A.qxp 06.6.5 11:09 AM Page 22 E Electromagnetic noise enters into TV sets or radios No Is the unit earthed? Earth the unit. Yes Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3m? Yes Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit.
06.6.5 11:09 AM Page 23 9-7. Test point diagram and voltage MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA Indoor electronic control P.C. board Varistor (NR11) Power supply input 230V AC Fuse(F11) } Release of Auto restart function Solder the Jumper wire to JR07. (Refer to 8-3.) Indoor fan motor (CN211) 1325V DC 3(-) Fiducial terminal of cathode side on measuring high-voltage DC 415V DC Display P.C. board.
OB419A.qxp 10 06.6.5 11:09 AM Page 24 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.
OB419A.qxp 06.6.5 11:09 AM Page 25 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 thermistors. (4) Disconnect the motor connector (CN211) and the vane motor connector (CN151 and CN152) on the electronic control P.C. board. (5) Remove the screw of earth wire to the heat exchanger.
OB419A.qxp 06.6.5 11:09 AM 11 Page 26 PARTS LIST (non-RoHS compliant) MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. INDOOR UNIT HEAT EXCHANGER 1 2 11 3 4 8 5 9 (See 11-5.) 12 13 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 10 Part No.
OB419A.qxp 06.6.5 11:09 AM Page 27 PARTS LIST (non-RoHS compliant) MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA 11-4. ACCESSORY AND REMOTE CONTROLLER 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 1 20 19 23 24 2 3 4 11 18 12 5 6 14 13 17 10 7 8 9 15 17 16 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. No. Part No.
OB419A.qxp 06.6.5 11:09 AM Page 28 PARTS LIST (non-RoHS compliant) 11-5. AIR CLEANING FILTER (ANTI-ALLERGY ENZYME 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 1 year. If AIR CLEANING FILTER is to be washed, soak AIR CLEANING FILTER in water (when showing dirt, in lukewarm water) and rinse it delicately, without removing the filter from the frame about once every 3 months.
06.6.5 11:09 AM 12 Page 29 RoHS PARTS LIST (RoHS compliant) MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA 12-1. INDOOR UNIT STRUCTURAL PARTS 12-2. INDOOR UNIT HEAT EXCHANGER 1 2 11 3 4 8 5 9 (See 12-5.) 12 13 6 7 12-1. 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 10 RoHS OB419A.qxp Part No.
OB419A.qxp 06.6.5 11:09 AM Page 30 RoHS PARTS LIST (RoHS compliant) MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA MSZ-GA80VA 12-4. ACCESSORY AND REMOTE CONTROLLER 12-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 1 20 19 23 24 2 3 4 11 18 12 5 6 14 13 17 10 7 8 9 15 17 16 12-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS No. RoHS Part numbers that are circled are not shown in the illustration. Part No.
OB419A.qxp 06.6.5 11:09 AM Page 31 RoHS PARTS LIST (RoHS compliant) 12-5. AIR CLEANING FILTER (ANTI-ALLERGY ENZYME 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 1 year. If AIR CLEANING FILTER is to be washed, soak AIR CLEANING FILTER in water (when showing dirt, in lukewarm water) and rinse it delicately, without removing the filter from the frame about once every 3 months.
OB419A.qxp 06.6.5 11:09 AM Page 32 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jun. 2006. No.OB419 REVISED EDITION-A 6 Distributed in Jun. 2005. No.OB419 6 Made in Japan New publication, effective Jun. 2006 Specifications subject to change without notice.
