Service manual

ManualsBrandsMitsubishi ManualsDomestic AppliancesMSZ-GA80 VA

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················8

8. SERVICE FUNCTIONS ······································9

9. TROUBLESHOOTING······································10

10. DISASSEMBLY INSTRUCTIONS·····················24

11. PARTS LIST······················································27

12. RoHS PARTS LIST···········································31

13. OPTIONAL PARTS···········································34

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

For servicing of RoHS compliant products, refer to the RoHS Parts List.

SERVICE MANUAL

Wireless type

Models

MSZ-GA22VA -

MSZ-GA25VA -

MSZ-GA35VA -

No. OB378

REVISED EDITION-C

INDOOR UNIT

Outdoor unit service manual

MUZ-GA·VA Series (OB379)

MXZ-A·VA Series (OB377)

MXZ-8A140VA1 (OC316)

Revision C:

• 3.SPECIFICATION has been corrected.

Please void OB378 REVISED EDITION-B.

OB378C--1.qxp 07.3.30 8:35 AM Page 1

Summary of content (36 pages)

PAGE 1
OB378C--1.qxp 07.3.30 8:35 AM Page 1 Revision C: SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS • 3.SPECIFICATION has been corrected. Please void OB378 REVISED EDITION-B. INDOOR UNIT No. OB378 SERVICE MANUAL REVISED EDITION-C Wireless type Models MSZ-GA22VA MSZ-GA22VA MSZ-GA22VA MSZ-GA25VA MSZ-GA25VA MSZ-GA25VA MSZ-GA35VA MSZ-GA35VA MSZ-GA35VA - E1 E2 E3 E1 E2 E3 E1 Outdoor unit service manual MUZ-GA·VA Series (OB379) MXZ-A·VA Series (OB377) MXZ-8A140VA1 (OC316) E2 E3 CONTENTS 1.
PAGE 2
OB378C--1.qxp 07.3.30 8:35 AM Page 2 Revision A: • MSZ-GA·VA- E2 has been added. Color of BOX and CORNER BOX has been changed to white. Revision B: • E3 model has been added. • Failure mode recall function(9-2.) has been changed. • RoHS PARTS LIST has been added. Revision C: • 3.SPECIFICATION has been corrected. Air flow of indoor units connecting to MXZ-8A140VA1 has been corrected.
PAGE 3
OB378C--1.qxp 2 07.3.
PAGE 4
OB378C--1.qxp 07.3.30 8:35 AM Page 4 MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA ACCESSORIES 1 Installation plate 1 2 Installation plate fixing screw 4 o 25 mm 5 3 Remote controller holder 1 4 Fixing screw for 3 3.5 o 1.
PAGE 5
OB378C--1.qxp 07.3.30 8:35 AM 3 Page 5 SPECIFICATION Indoor model MSZ-GA22VA Cooling Function Power supply A A W % A Special remarks K /h Electrical data Air flow(Super High/High) Air flow(Med./Low) Power outlet Running current ✽1 Power input ✽1 Power factor ✽1 Fan motor current ✽1 Fan motor Model Dimensions WOHOD Weight Air direction Sound level(Super High) Sound level(High/Med.
PAGE 6
OB378C--1.qxp 4 07.3.
PAGE 7
07.3.30 8:35 AM OUTLINES AND DIMENSIONS Unit : mm MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA 225 335 55 320 102 5 Installation plate { Liquid line [6.35-0.5m Gas line [9.52-0.43m Insulation [35 O.D [19 I.D Drain hose [16 (Connected part O.D) 90 Insulation [28 106 19 3 Wall hole [65 7 or more 100 298 Air out Required space (Indoor unit) 7 75 or more 66 or moreW 75 or more 10 or more 159 70 Air in 210 624.5 155 42.5 155 Indoor unit 58 55 215 41.5 780 53.5 225 214 234 273.5 287.
PAGE 8
OB378C--1.qxp 6 07.3.30 8:35 AM Page 8 WIRING DIAGRAM MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA 230V~ TO OUTDOOR UNIT CONNECTING TB S1 BLK S2 BLU RED S3 12-24V TAB3 INDOOR ELECTRONIC CONTROL P.C. BOARD F11 DB111 2 1 T111 GRN 5 MV SYMBOL DB111 F11 MF MV NR11 LD 101(A) 2 INTERLOCK SWITCH(FAN) RT12 1 1 2 3 4 5 6 LD104 CN 1R1 RT13 CN 111 NR11 CN201 CN 151 4 CN 3 112 2 LD 105(T) RT11 RED BLK WHT YLW BLU 5 MF CN211 2 6 POWER MONITOR RECEIVER P.C.BOARD SW P.C.
PAGE 9
OB378C--1.qxp 07.3.30 8:35 AM 8 Page 9 SERVICE FUNCTIONS MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA 8-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board. The time will be shortened as follows. (Refer to 9-7.) 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.
PAGE 10
OB378C--1.qxp 07.3.30 8:35 AM Page 10 8-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the 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. Operation 1 If the main power has been cut, the operation settings remain.
PAGE 11
OB378C--1.qxp 07.3.30 8:35 AM Page 11 3. Troubleshooting procedure 1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. 2) Before servicing, check that the connector and terminal are connected properly. 3) If the electronic control P.C.
PAGE 12
OB378C--1.qxp 07.3.30 8:35 AM Page 12 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.
PAGE 13
OB378C--1.qxp 07.3.30 8:35 AM Page 13 2. Indoor unit failure mode table Left lamp of OPERATION INDICATOR lamp Not lighted Abnormal point (Failure mode) Condition Correspondence Normal – – 1-time flash every 0.5-second Room temperature thermistor The room temperature thermistor short or open circuit is detected every 8 seconds during operation. Refer to the characteristics of the room temperature thermistor (Refer to 9-7.). 2-time flash 2.
PAGE 14
OB378C--1.qxp 07.3.30 8:35 AM Page 14 9-3. Instruction of troubleshooting Start Indoor unit operates. Outdoor unit doesn't operate. Indoor unit operates. Outdoor unit doesn't operate normally. Indoor unit doesn't receive the signal from remote controller. Outdoor unit operates only in Test Run operation. w Outdoor unit doesn't operate even in Test Run operation. w Unit doesn't operate normal operation in COOL or HEAT mode. Indoor unit operates, when EMERGENCY OPERATION switch is pressed.
PAGE 15
OB378C--1.qxp 07.3.30 8:35 AM Page 15 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. Lighted OPERATION INDICATOR No.
PAGE 16
OB378C--1.qxp 07.3.30 8:35 AM Lighted OPERATION INDICATOR No. Abnormal point Page 16 · Flashing of OPERATION INDICATOR lamp (all lamps) indicates abnormality. Blinking Not lighted Operation indicator lamp All lamps flash at the same time. Attachment 0.5-second ON of the 1 horizontal vane 0.5-second OFF OPERATION INDICATOR Lighted Blinking Not lighted No. 1 Abnormal point Symptom Condition Indoor unit and outdoor unit do not operate.
PAGE 17
OB378C--1.qxp 07.3.30 8:35 AM Page 17 9-6. Troubleshooting 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.
PAGE 18
OB378C--1.qxp 07.3.30 8:35 AM Page 18 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. Press OPERATE/STOP(ON/OFF) button on the remote controller. Is LCD display on the the remote controller visible? No Replace the batteries. (Refer to 9-1.4.
PAGE 19
OB378C--1.qxp 07.3.30 8:35 AM Page 19 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.
PAGE 20
OB378C--1.qxp 07.3.30 8:35 AM Page 20 • 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 every 0.5-second. Outdoor unit does not operate. D How to check mis-wiring and serial signal error Turn OFF the power supply. Is there rated voltage in the power supply? No Check the power supply. Yes Turn ON the power supply.
PAGE 21
OB378C--1.qxp 07.3.30 8:35 AM Page 21 When all lamps flash ON and OFF every 0.5-second. Indoor unit and outdoor unit do not operate. E Check of installation of the horizontal vane Turn OFF the power supply. Is the stopper of the horizontal vane locked to the indoor unit correctly? No Relock the stopper of the horizontal vane to the indoor unit. (Refer to 9-1.5.) Yes Turn ON the power supply.
PAGE 22
OB378C--1.qxp 07.3.30 8:35 AM Page 22 F 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.
PAGE 23
OB378C--1.qxp 07.3.30 8:48 AM Page 23 9-7. Test point diagram and voltage MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA Indoor electronic control P.C. board Power supply input 230V AC } Varistor (NR11) Fuse(F11) (T3.15AL250V) R111 Indoor fan motor (CN211) 1311V DC 3(-) Fiducial terminal of cathode side on measuring high-voltage DC 415V DC 5(+)3-6V DC 6(+)0V DC or 15V DC Release of Auto restart function Solder the Jumper wire to JR07 (Refer to 8-3.
PAGE 24
OB378C--1.qxp 10 07.3.30 8:35 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.
PAGE 25
OB378C--1.qxp 07.3.30 8:35 AM Page 25 OPERATING PROCEDURE PHOTOS 2. Removing the electronic control P.C. board, the power monitor receiver P.C. board, SW P.C. board and the terminal block (1) Remove the horizontal vane, the panel (Refer to 1.) and the corner box. (2) Remove the screw of V.A. clamp, and then the indoor/outdoor connecting wire. (See Photo 2.) (3) Remove the switch holder from the electrical cover. (See Photo 3.) (4) Remove the screw of the electrical cover, and then the electrical cover.
PAGE 26
OB378C--1.qxp 07.3.30 8:35 AM Page 26 OPERATING PROCEDURE PHOTOS Photo 5 4. Removing the horizontal vane motor unit (1) Remove the horizontal vane and the panel. (Refer to 1.) (2) Remove the screws of the horizontal vane motor unit, and pull out the horizontal vane motor unit. (See Photo 5.) (3) Disconnect the connector from the horizontal vane motor unit. 5. Removing the indoor fan motor and the line flow fan (1) Remove the horizontal vane, the panel (Refer to 1.) and the corner box.
PAGE 27
OB378C--1.qxp 07.3.30 8:35 AM 11 Page 27 PARTS LIST (non-RoHS compliant) MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. ACCESSORY AND REMOTE CONTROLLER 1 11 10 9 8 2 7 (See 13.) 3 4 5 6 11-1. INDOOR UNIT STRUCTURAL PARTS No. 1 2 3 4 5 6 7 8 9 Part No.
PAGE 28
OB378C--1.qxp 07.3.30 8:35 AM Page 28 PARTS LIST (non-RoHS compliant) MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 21 20 19 17 18 1 2 3 4 5 6 7 14 15 13 12 15 11 10 11-4.
PAGE 29
OB378C--1.qxp 07.3.30 8:35 AM Page 29 PARTS LIST (non-RoHS compliant) 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Part No.
PAGE 30
OB378C--1.qxp 07.3.
PAGE 31
OB378C--2.qxp 07.3.30 8:37 AM 12 Page 31 RoHS PARTS LIST (RoHS compliant) MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA 12-1. INDOOR UNIT STRUCTURAL PARTS 12-2. ACCESSORY AND REMOTE CONTROLLER 1 11 10 9 8 2 7 (See 13.) 3 4 5 6 No. RoHS 12-1. INDOOR UNIT STRUCTURAL PARTS 1 2 3 4 5 6 7 8 9 G G G G G G G G G Part No.
PAGE 32
OB378C--2.qxp 07.3.30 8:37 AM Page 32 RoHS PARTS LIST (RoHS compliant) MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA 12-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 21 20 19 17 18 1 2 3 4 5 6 7 14 15 13 12 15 11 10 12-4.
PAGE 33
OB378C--2.qxp 07.3.30 8:37 AM Page 33 RoHS PARTS LIST (RoHS compliant) No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 RoHS 12-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS G G G G G G G G G G G G G G G G G G G G G G G G Part No.
PAGE 34
OB378C--2.qxp 13 07.3.30 8:37 AM Page 34 OPTIONAL PARTS 13-1. 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.
PAGE 35
OB378C--2.qxp 07.3.
PAGE 36
OB378C--2.qxp 07.3.30 8:37 AM Page 36 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Apr. 2007. No. OB378 REVISED EDITION-C 6 Distributed in Jan. 2007. No. OB378 REVISED EDITION-B 6 Distributed in Jan. 2006. No. OB378 REVISED EDITION-A 6 Distributed in Jan. 2005. No. OB378 6 Made in Japan New publication, effective Apr. 2007 Specifications subject to change without notice.