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Mitsubishi Electric MSZ-CB22VA, Service Manual, Page: 24 / 36

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Mitsubishi Electric MSZ-CB22VA Service Manual Download Page 24

24

DISASSEMBLY INSTRUCTIONS

10

(1)  Slide the sleeve and check if there is a locking lever or not.

(2) The terminal with this connector has the 
      locking mechanism.

1

Slide the sleeve.

2

Pull the terminal while 

   pushing the locking
   lever.

1

Hold the sleeve, and 

   pull out the terminal 
   slowly.

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.

<"Terminal with locking mechanism" Detaching points>

Connector

Sleeve

Locking lever

MSZ-GA22VA

MSZ-GA25VA

MSZ-GA35VA

INDOOR UNIT

OPERATING PROCEDURE

PHOTOS

Photo 1

1.  Removing the panel

(1) Remove the horizontal vane. 
(2) Remove the screw caps of the panel.

Remove the screws. (See Photo 1.)

(3) Hold the lower part of both ends on the panel and pull it 

slightly toward you, and then remove the panel by pushing 
it upward.

Screws of the panel

Horizontal vane

OB378C--1.qxp  07.3.30 8:35 AM  Page 24

Summary of Contents for MSZ-CB22VA

Page 1: ...T 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 GA22VA MSZ GA22VA MSZ GA25VA MSZ GA25VA MSZ GA25VA MSZ GA35VA MSZ GA35VA MSZ GA35VA E3 E2 E1 E3 E2 E1 E3 E2 E1 No OB378 REVISED EDITION C INDOOR UNIT Outdoor unit service manual MUZ GA VA Ser...

Page 2: ... MSZ GA35VA E2 E1 E2 E1 E2 E1 TECHNICAL CHANGES 1 MSZ A09YV MSZ GA22VA MSZ A09YV MSZ GA25VA MSZ A12YV MSZ GA35VA E1 E1 E1 E1 E1 E1 NOTE Do not remove the vane motor from the motor unit Do not disassemble the horizontal vane motor unit Generalized stepping motor 10 Air cleaning filer has been removed available as an optional part 11 Signal of remote controller has been changed It is not available f...

Page 3: ... section Front panel Panel Heat exchanger Horizontal vane Operation section When the front panel is opened Remote controller Remote control receiving section Catechin air filter Air cleaning filter Optional parts Anti Allergy Enzyme Filter Blue bellows type Emergency operation switch Fan guard Operation Indicator lamp ...

Page 4: ...t rear piping 1 5 1 2 2 1 1 MSZ GA22VA MSZ GA25VA MSZ GA35VA ON TIMER button CLOCK SET button TIME SET buttons FORWARD button BACKWARD button OFF TIMER button This diagram shows an overall view Open the front lid RESET button VANE CONTROL button Signal transmitting section Operation display section Temperature buttons OPERATE STOP ON OFF button FAN SPEED CONTROL button OPERATION SELECT button ECON...

Page 5: ...mensions WOHOD Weight Air direction Sound level Super High Sound level High Med Low Fan speed Super High High Fan speed Med Low Fan speed regulator Remote controller model K h A A W A mm kg dB A dB A rpm Electrical data Fan motor Special remarks Capacity MSZ GA25VA MSZ GA22VA MSZ GA35VA Indoor model Function Cooling 528 432 336 234 930 760 580 Heating 540 420 366 258 900 800 620 Cooling 528 432 33...

Page 6: ... High FAN SPEED HEATING Heating Dry bulb temperature 20 Wet bulb temperature 15 MSZ GA22VA MSZ GA25VA INDOOR UNIT WALL MICROPHONE 0 8m 1m 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz Test conditions Cooling Dry bulb temperature 27 Wet bulb temperature 19 APPROXIMA...

Page 7: ... Air out Wall hole 65 Indoor unit Installation plate Installation plate 11X20 Oblong hole 11X26 Oblong hole 10 or more 75 or more 66 or more W 75 or more W In case of left left back or left under piping using spacer 115 or more Insulation 28 Drain hose 16 Connected part O D Liquid line 6 35 0 5m Gas line 9 52 0 43m Insulation 35 O D 19 I D Required space Indoor unit MSZ GA35VA MSZ GA22VA ...

Page 8: ...HORIZONTAL VARISTOR NAME ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR MAIN INDOOR COIL THERMISTOR SUB TRANSFORMER TERMINAL BLOCK NOTE 1 About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block Connector MSZ GA22VA MSZ GA25VA MSZ GA35VA 4 3 2 1 S2 POWER MONITOR R...

Page 9: ... Same as at left Same as at left Solder both J1 and J2 Table 1 How to set the remote controller exclusively for particular indoor unit After you turn the breaker ON the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit The indoor unit will only accept the signal from the remote controller that has been assigned to the ind...

Page 10: ...ntroller before power failure the auto restart function does not work as the power button of the remote controller is off To prevent breaker off due to the rush of starting current systematize other home appliance not to turn ON at the same time When some air conditioners are connected to the same supply system if they are operated before power failure the starting current of all the compressors m...

Page 11: ...ies Then reattach the front lid If horizontal vane is not installed correctly all of the operation indicator lamps will blink In this case install the horizontal vane correctly by following the procedures 1 to 2 NOTE Before installation of the horizontal vane turn OFF the power supply 5 How to install the horizontal vane In procedure 2 2 lock the stoppers until they click into place INFORMATION FO...

Page 12: ...g pattern and confirm the abnormal point with the indoor unit failure mode table Refer to 9 2 2 Make sure to check at least two consecutive blinking cycles W2 Turn ON the power supply Preparation of the remote controller 1 While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button 2 First release RESET button And release the other t...

Page 13: ...to the characteristics of the main indoor coil thermistor the sub indoor coil thermistor Refer to 9 7 Indoor coil thermistor The indoor coil thermistor short or open circuit is detected every 8 seconds during operation 3 time flash 2 5 second OFF Refer to 9 6 D How to check mis wiring and serial signal error Serial signal The serial signal from outdoor unit is not received for a maximum of 6 minut...

Page 14: ...ime flash Cause Outdoor unit Outdoor power system abnormality Left lamp 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit Left lamp 7 time flash Cause Outdoor unit Trouble of outdoor control system Refer to 9 6 D How to check of mis wiring and serial signal error All lamps Flash on and off at 0 5 second intervals Cause Indoor unit The horizontal vane is not installed correctly ...

Page 15: ...it do not operate Indoor unit and outdoor unit do not operate Left lamp flashes 5 time flash 2 5 second OFF Left lamp flashes 6 time flash 2 5 second OFF Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not operate Other abnormality An abnormality other than above mentioned is detected Confirm the abnormality in detail using th...

Page 16: ...ime the operation mode of the indoor unit that has operated at first has the priority Unify the operation mode Refer to outdoor unit service manual 2 5 second OFF Right lamp flash Flashing of OPERATION INDICATOR lamp all lamps indicates abnormality Flashing of OPERATION INDICATOR lamp right hand side lamp indicates abnormality OPERATION INDICATOR lamp left hand side lamp is lighted 9 5 Trouble cri...

Page 17: ...n 12 seconds after EMERGENCY OPERATION switch is pressed If more than 12 seconds passes by turn OFF the power supply and turn ON it again then measure the voltage w 1 Measure the voltage between CN211 1 and 3 2 Measure the voltage between CN211 5 and 3 Is there 325V DC between CN211 1 and 3 and does the voltage between CN211 5 and 3 rise to the range of 3 to 6V DC within 12 seconds after EMERGENCY...

Page 18: ...from radio Are there any fluorescent lights of inverter or rapid start type within the range of 1m Replace the indoor electronic control P C board Replace the remote controller Reinstall the unit away from lights Attach a filter on receiving part Press OPERATE STOP ON OFF button on the remote controller Is LCD display on the the remote controller visible Remove the batteries then set them back and...

Page 19: ...e resistance between CN211 3 and 4 of the indoor fan motor connector Short open circuit Replace the indoor fan motor Short open circuit Replace the horizontal vane motor and the indoor electronic control P C board Turn OFF the power supply Check both parts side and pattern side of the indoor electronic control P C board visually Replace the varistor NR11 and fuse F11 Are the varistor NR11 burnt an...

Page 20: ... OFF the power supply Remove the short circuit between outdoor terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20V DC between outdoor terminal block S2 and S3 Confirmation of serial signal Is there rated voltage between indoor terminal block S1 and S2 Confirmation of power voltage Replace the indoor electronic control P C board Replace the inverter P C board or the ou...

Page 21: ...lock the stopper of the horizontal vane to the indoor unit Refer to 9 1 5 Yes Are all lamps flashing Yes No No OK Turn ON the power supply To check the continuity of the interlock switch Fan measure the resistance of connector 1 2 connected to CN1R1 on the indoor electronic control P C board Turn OFF the power supply Turn OFF the power supply When all lamps flash ON and OFF every 0 5 second Indoor...

Page 22: ...nit of the air conditioner indoor outdoor wiring grounding wire antennas wiring from antennas receiver 5 Electric field intensity of the broadcast station affected by the electromagnetic noise 6 Presence or absence of amplifier such as booster 7 Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and then turn ON the power supply In this...

Page 23: ... Indoor coil thermistor RT12 MAIN 12 RT13 SUB 34 CN112 Horizontal vane motor CN151 9 7 Test point diagram and voltage SW P C board Power monitor receiver P C board 12V DC 5V DC Interlock switch Fan CN1R1 Power supply input Indoor fan motor CN211 Varistor NR11 Room temperature thermistor RT11 Timer short mode point JPG JPS Refer to 8 1 5 3 6V DC 415V DC 3 Fiducial terminal of cathode side on measur...

Page 24: ...e terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching Terminal with locking mechanism Detaching points Connector Sleeve Locking lever MSZ GA22VA MSZ GA25VA MSZ GA35VA INDOOR UNIT OPERATING PROCEDURE PHOTOS Photo 1 1 Removing the panel 1 Remove the horizontal vane 2 Remove the screw caps of the pan...

Page 25: ...nected to the heat exchanger from the electrical box See Photo 4 12 Unhook the catches of the electrical box and pull out the electrical box 13 Remove the screws of the terminal block cover and then the terminal block cover and the terminal block holder See Photo 2 14 Remove the terminal block by sliding it OPERATING PROCEDURE PHOTOS Screw of the electrical cover Switch holder Photo 3 3 Removing t...

Page 26: ...orner box 2 Remove the switch holder and the electrical box Refer to 3 3 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 4 Remove the screws fixing the motor bed See Photo 6 5 Loosen the screw fixing the line flow fan See Photo 7 6 Remove the motor bed together with fan motor and motor band 7 Release the hooks of the motor band and remove the motor band then pull ou...

Page 27: ... CORNER BOX RIGHT CORNER BOX RIGHT INSTALLATION PLATE Including No 3 4 2PCS SET MAC 415FT E MSZ GA22VA E1 E2 E1 E2 E1 E2 MSZ GA25VA MSZ GA35VA 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 E02 897 234 E02 A32 234 E02 915 000 E02 913 067 E02 915 010 E02 915 100 E02 916 100 E02 913 975 E02 A32 975 E02 913 970 1 1 E02 915 426 E02 527 083 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1...

Page 28: ... non RoHS compliant 28 11 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS MSZ GA22VA MSZ GA25VA MSZ GA35VA 4 2 5 3 9 1 6 22 11 4 INDOOR UNIT HEAT EXCHANGER 10 8 7 12 13 14 15 16 21 24 23 11 15 15 19 17 18 20 ...

Page 29: ...UNION GAS UNION LIQUID 9 52 6 35 E02 751 509 E02 001 504 E02 897 702 E02 915 235 E02 897 303 E02 897 316 E02 913 040 E02 127 382 E02 A49 382 E02 661 385 E02 915 095 E02 897 784 E02 897 780 E02 897 779 E02 913 375 E02 915 452 E02 916 452 E02 917 452 E02 897 308 E02 913 307 E02 915 782 E02 915 300 E02 897 333 E02 897 302 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Page 30: ...30 ...

Page 31: ...R RIGHT AIR CLEANING FILTER CORNER BOX RIGHT INSTALLATION PLATE Including No 3 4 2PCS SET MAC 415FT E MSZ GA22VA E2 E3 E2 E3 E2 E3 MSZ GA25VA MSZ GA35VA 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 E12 A32 234 E12 915 000 E12 913 067 E12 915 010 E12 915 100 E12 916 100 E12 A32 975 E12 913 970 1 1 E12 915 426 E12 527 083 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Page 32: ...RTS LIST RoHS compliant 12 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS MSZ GA22VA MSZ GA25VA MSZ GA35VA 4 2 5 3 9 1 6 22 12 4 INDOOR UNIT HEAT EXCHANGER 10 8 7 12 13 14 15 16 21 24 23 11 15 15 19 17 18 20 ...

Page 33: ...9 52 6 35 E12 751 509 E12 001 504 E12 897 702 E12 915 235 E12 897 303 E12 897 316 E12 913 040 E12 A49 382 E12 661 385 E12 915 095 E12 897 784 E12 897 780 E12 897 779 E12 913 375 E12 916 452 E12 B39 452 E12 B40 452 E12 B41 452 E12 897 308 E12 913 307 E12 915 782 E12 915 300 E12 897 333 E12 897 302 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

Page 34: ...eaning filter Blue bellows type from the catechin air filter Replacement of the air cleaning filter 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 a...

Page 35: ...35 ...

Page 36: ...C 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 ...

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