Mitsubishi MSZ-GA25VA - E2, MSZ-GA25VA - E3, MSZ-GA35VA - E1, MSZ-GA35VA - E2, MSZ-GA35VA - E3 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Wireless type
Models

Revision C:

• 3.SPECIFICATION has been corrected.

Please void OB378 REVISED EDITION-B.

No. OB378

REVISED EDITION-C

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

E2

E3

Outdoor unit service manual

MUZ-GA·VA Series (OB379)
MXZ-A·VA Series (OB377)
MXZ-8A140VA1 (OC316)

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

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 A:

• MSZ-GA·VA- has been added.
Color of BOX and CORNER BOX has been changed to white.

E2

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-8A140VA

1 has been corrected.

1

MSZ-A09YV - ➔ MSZ-GA22VA ­MSZ-A09YV - ➔ MSZ-GA25VA ­MSZ-A12YV - ➔ MSZ-GA35VA -

1. Indication of capacity has been changed.(BTU base ➔kW base)

2. Control method between indoor and outdoor has been changed.

3. Power supply method has been changed (change to supply from outdoor unit).

4. Power supply cord has been removed.

5. Indoor electronic control P.C. board has been changed.

6. Position of terminal block has been changed.

7. Indoor fan motor has been changed. ( AC ➔ DC)

8. Indoor heat exchanger has been changed.

9. The horizontal vane motor unit has been changed.
An external gear is added to the generalized
stepping motor.
The unit is structured so that the driving torque and
stopping torque would increase.

10. Air cleaning filer has been removed (available as an optional part).

11. Signal of remote controller has been changed. ( It is not available for the conventional models.)

12. Symbol on terminal block has been changed (to S1/S2/S3).

MSZ-GA22VA- ➔ MSZ-GA22VA­MSZ-GA25VA- ➔ MSZ-GA25VA­MSZ-GA35VA- ➔ MSZ-GA35VA-

1. Color of BOX and CORNER BOX has been changed to white.

TECHNICAL CHANGES

E1E1
E1E1
E1E1

NOTE:

Do not remove the vane motor
from the motor unit.
Do not disassemble the horizontal
vane motor unit.

Generalized stepping motor

E2E1
E2E1
E2E1

MSZ-GA22VA- ➔ MSZ-GA22VA­MSZ-GA25VA- ➔ MSZ-GA25VA­MSZ-GA35VA- ➔ MSZ-GA35VA-

1. The operation of thermo-off-unit has been changed. (When 2 or more indoor units are connected with a multi type outdoor
unit, and operated in heat mode.)

E2E1

< , > Indoor fan operates with very Low speed or stops.

E3

< > Indoor fan operates intermittently with very Low speed or stops.

MSZ-GA25VA- ➔ MSZ-GA25VA-

1. Indoor fan speed has been changed.

E3E2
E3E2
E3E2

E3E2

2

2

Line flow fan

Air outlet
Vertical vane

Air inlet

Display 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,Anti­Allergy Enzyme Filter,
Blue bellows type)

Emergency operation switch

Fan guard

Operation Indicator
lamp

PART NAMES AND FUNCTIONS

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA

3

1
2
3
4
5
6
7

Installation plate
Installation plate fixing screw 4 o 25 mm
Remote controller holder
Fixing screw for 3 3.5 o 1.6 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)

1
5
1
2
2
1
1

MSZ-GA22VA

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

ECONO COOL button

Indication of
remote controller
model is on back

MSZ-GA25VA
MSZ-GA35VA

ACCESSORIES

REMOTE CONTROLLER

4

3

T3.15AL 250V

MSBPC20M16 12V DC 250" (at 25˚C)

ERZV14D471

3P

INDOOR UNIT

Item
Fuse
Horizontal vane motor
Varistor
Terminal block

(F11)

(MV)

(NR11)

(TB)

MSZ-GA25VA MSZ-GA22VA MSZ-GA35VA

Indoor model

Function

Power supply

1

Single phase

230V,50Hz

630/504
384/258

10

0.25
33
57

0.25

RC0J30-CC

780O298O210

9
4

43

36/29/21

1,250/1,040

830/620

4

KM05B

Single phase

230V,50Hz

10

0.25
33
57

0.25

RC0J30-CC

780O298O210

9
4

43

36/29/21

4

KM05B

43

36/29/21

1,100

43

36/29/22

Cooling

600/480
366/234

1,200/1,000

800/580

2

486/408
336/258

1,010/880

750/620

Cooling

600/480
366/234

1,200/1,000

800/580

Heating

630/504
384/258

1,250/1,040

830/620

Single phase

230V,50Hz

10

0.25
33
57

0.25

RC0J30-CC

780O298O210

9
4

43

36/29/22

4

KM05B

Cooling

600/480
366/246

1,200/1,000

800/600

Heating

630/504
384/270

1,250/1,040

830/640

Air flow(Super High/High)
Air flow(Med./Low)
Power outlet
Running current ✽1
Power input ✽1
Power factor ✽1
Fan motor current ✽1
Model
Dimensions 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

432/336/234

930/760/580

Heating

540

420/366/258

900/800/620

Cooling

582

468/354/246

1,200

1,000/800/600

Heating

618

504/390/270

1,230

1,040/850/640

Air flow(Super High)
Air flow(High/Med./Low)
Sound level(Super High)
Sound level(High/Med./Low)
Fan speed(Super High)
Fan speed(High/Med./Low)

K /h
K /h

dB(A)
dB(A)

rpm
rpm

Special

remarks

Capacity

43

36/29/21

1,100

Heating

1 :

E1 , E2 (serial number : ~ 6024700)

2 :

E2 (serial number : 6024701 ~) , E3

SPECIFICATION

When outdoor unit is MXZ-8A140VA

NOTE : Test conditions are based on ISO 5151

Specifications and rating conditions of main electric parts

Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19:
Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:
Refrigerant piping length (one way): 5m

✽1 Measured under rated operating frequency.

Outdoor Dry-bulb temperature 35:Wet-bulb temperature 24:
Outdoor Dry-bulb temperature 7:Wet-bulb temperature 6:

1.

5

4

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:

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

COOLING

FUNCTION

43
43

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:

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:

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

COOLING

FUNCTION

43
43

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:

NOISE CRITERIA CURVES

MSZ-GA22VA
MSZ-GA25VA

MSZ-GA35VA

6

5

155 155

335 320

41.5 215

42.5

214

3

287.5

7055

5555 225 225

or more7

100

90

106

298

102624.5

780

210 5

53.5
19

159

58

14273.5

234

Air in

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)

OUTLINES AND DIMENSIONS

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA

Unit : mm

7

6

Indoor
heat
exchanger

Flared connection

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT13(sub)

Flared connection

Refrigerant flow in cooling
Refrigerant flow in heating

Refrigerant pipe [9.52
(with heat insulator)

Refrigerant pipe [6.35
(with heat insulator)

Indoor coil
thermistor
RT12(main)

SYMBOL

DB111

F11

MF

MV

NR11

SYMBOL

RT11
RT12
RT13

T111

TB

NAME
DIODE STACK
FUSE (T3.15AL250V)
INDOOR FAN MOTOR
VANE MOTOR (HORIZONTAL)
VARISTOR

NAME
ROOM TEMPERATURE THERMIST OR
INDOOR COIL THERMISTOR (MAIN)
INDOOR COIL THERMISTOR (SUB)
TRANSFORMER
TERMINAL BLOCK

4
3
2
1

S2

POWER MONITOR
RECEIVER P.C.BOARD

2

6

230V~

BLU

INDOOR ELECTRONIC
CONTROL P.C. BOARD

SW P.C.
BOARD

INTERLOCK
SWITCH(FAN)

5

MV

TO OUTDOOR
UNIT
CONNECTING

BLK

RED

S3

TB

TAB3

DB111

NR11

F11

5

6

4

2

2

LD

105(T)

LD

101(A)

12-24V

RT13

1R1

CN

GRN

LD104

CN201

2
1

151

CN

T111

RED

WHT

111

CN

CN

112

CN211

BLU

YLW

BLK

MF

RT11

RT12

1
3
5

S1

WIRING DIAGRAM

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA

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

7

REFRIGERANT SYSTEM DIAGRAM

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA

8

Unit : mm

8

No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit

1 unit operation
No modification

–
–
–

2 units operation

Same as at left

Solder J1

–
–

3 units operation

Same as at left
Same as at left

Solder J2

–

4 units operation

Same as at left
Same as at left
Same as at left

Solder both J1 and J2

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. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification.
The board has a print as shown below :

NOTE : For modification, take out

the batteries and press the
OPERATE/STOP(ON/OFF)
button twice or 3 times at
first.
After finish modification,
put back the batteries then
press the RESET button.

J1

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.
After modification, press the RESET button.

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 indoor unit once they are
set.
The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.

9

Housing point

JR07

CN151 CN211CN112 CN1R1

BZ

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.

2 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”

1

Turn OFF the main power for the unit.

2Solder the Jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 9-7.)

NOTE:

• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the

remote controller.

• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is

cancelled.

• If the unit has been off with the remote controller 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 may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting
current by adding to the system that allows the units to start one by one.

9

TROUBLESHOOTING

MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA

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.

2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the
electronic control P.C. board.

3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.

4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

Lead wiring

10

3. Troubleshooting procedure

RESET button

Insert the negative pole of the
batteries first. Check if the polarity
of the batteries is correct.

OPERATION INDICATOR

Not lighted

Blinking

Lighted

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. board is supposed to be defective, check the copper foil pattern for disconnection and the

components for bursting and discoloration.

4) When troubleshooting, refer to 9-2., 9-3. and 9-4.

4. How to replace batteries

Weak batteries may cause the remote controller malfunction.
In this case, replace the batteries to operate the remote controller normally.

1 Remove the front lid and insert batteries.

Then reattach the front lid.

2 Press RESET button with tip end of ball point pen

or the like, and then use the remote controller.

NOTE : 1. If RESET button is not pressed, the remote controller may not operate correctly.

2. This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced.
This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by
the battery replacement.

5. How to install the horizontal vane

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.

Stopper

21

Left

In procedure
stoppers until they click
into place.

Lock.

Insert this end first.

INFORMATION FOR MULTI SYSTEM AIR CONDITIONER
OUTDOOR UNIT : MXZ series

Multi system air conditioner can connect two or more indoor units with one outdoor unit.

•Unit won’t operate in case the total capacity of indoor units exceeds the capacity of outdoor units. Do not
connect indoor units beyond the outdoor unit capacity.
Operation indicator lamp flashes as shown in the figure below.

•When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and
the other for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor
units cannot operate, indicating as shown in the figure below. In this case, please set all the indoor units to
the same operation mode.

22

lock the

•When indoor units starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes
(max. 10 minutes) to blow out the warm air.

•In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant
flowing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it.

11

9-2. Failure mode recall function

Operational procedure

Yes

(Blinks)

No

(OFF)

Yes

No

Releasing the failure mode recall function

Note1.Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly.

2.If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

W2. Blinking pattern when the indoor unit is abnormal:

W3.Blinking pattern when the outdoor unit is abnormal:

ON

OFF

Beeps

Repeated cycle Repeated cycle

ON

OFF

No beep Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5­second interval

2.5-second OFF 3-second ON

Blinking at 0.5­second interval

Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5­second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5­second interval

Repeated cycle

Beeps

Does the left lamp of OPERATION INDICATOR
lamp on the indoor unit blink at the interval of 0.5
seconds?
Blinks: Either indoor or outdoor unit is abnormal.
Beep is emitted at the same timing
as the blinking of the left lamp of
OPERATION INDICATOR lamp. W2

The cause of abnormality cannot be found because the abnormality doesn't recur.

Setting up the failure mode recall function

Before blinking, does the left lamp of
OPERATION INDICATOR lamp stay ON for 3
seconds?
Stays ON for 3 seconds (without beep):
The outdoor unit is abnormal.

The indoor unit is abnormal.
Check the blinking 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 two buttons after all LCD except the set temperature in
operation display section of the remote controller is displayed after 3 seconds.

Deleting the memorized abnormal condition

1After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function" mentioned above.
2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed)
with the remote controller headed towards the indoor unit.

3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.
4Release the failure mode recall function according to "Releasing the failure mode recall function"

mentioned above.

Repair the defective parts.

Release the failure mode recall function by the following procedures.
Turn OFF the power supply and turn it ON again.
Press RESET button of the remote controller.

Judgment of indoor/outdoor abnormality

Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature
is displayed) with the remote controller headed towards the indoor unit. W1

Indoor unit is normal.
But the outdoor unit might be abnormal because there are some
abnormalities that can't be recalled with this way.
Confirm if outdoor unit is abnormal according to the detailed outdoor
unit failure mode recall function.

The outdoor unit is abnormal.
Check the blinking pattern, and confirm the abnormal point with the
outdoor unit failure mode table (Refer to outdoor unit service manual.)
Make sure to check at least two consecutive blinking cycles. W3

W1. Regardless of normal or abnormal condition,
a short beep is emitted once the signal
is received.

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

12

2. Indoor unit failure mode table

12-time flash

2.5-second OFF

Replace the indoor electronic control
P.C. board.

Indoor control system

It cannot properly read data in the nonvolatile
memory of the indoor electronic control P.C.
board.

11-time flash

2.5-second OFF

Refer to 9-6.A "Check of indoor fan
motor".

Indoor fan motor

The rotational frequency feedback signal is
not emit during the 12-second the indoor fan
operation.

2-time flash

2.5-second OFF

Refer 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 minutes.

1-time flash
every 0.5-second

Refer to the characteristics of the room
temperature thermistor (Refer to 9-7.).

Room temperature
thermistor

The room temperature thermistor short or
open circuit is detected every 8 seconds
during operation.

Not lighted –Normal –

Left lamp of OPERATION

INDICATOR lamp

Correspondence

Abnormal point
(Failure mode)

Condition

NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table(9-4.).

13

Start

Indoor unit
operates.
Outdoor unit
doesn't
operate.

Indoor unit
doesn't receive
the signal from
remote controller.

OPERATION INDICATOR
lamp on the indoor unit is
flashing on and off.

Outdoor unit
operates only
in Test Run
operation.

w

Outdoor unit
doesn't
operate
even in
Test Run
operation.

w

Indoor unit
operates, when
EMERGENCY
OPERATION
switch is pressed.

Indoor unit
doesn't operate,
when
EMERGENCY
OPERATION
switch is pressed.

Check room
temperature
thermistor.
Refer to 9-7.
"Test point
diagram and
voltage".

Refer to
"How to check
inverter/
compressor".

Refer to 9-6.B
"Check of
remote controller
and receiver
P.C. board".

1. Check indoor / outdoor
connecting wire.
(Check if the power
is supplied to the
indoor unit.)

2. Refer to 9-6.C
"Check of indoor
electronic control
P.C. board and indoor
fan motor".

Unit doesn't
operate
normal
operation in
COOL or
HEAT mode.

Refer to
"Check of
R.V. coil".

Left lamp
Flash on and off
at 0.5-second
intervals
Cause:
Indoor/
Outdoor unit

• Mis-wiring
or trouble
of serial signal

Left

lamp
2-time flash
Cause:
Indoor unit

• Trouble of
room temp­ erature/
indoor coil
thermistor

Left

lamp
3-time flash
Cause:
Indoor unit

• Trouble of
indoor fan
motor

Left lamp
5-time 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.

Refer to 9-6.
E "Check of
installation of
the horizontal
vane".

Check room
temperature
thermistor
and indoor
coil thermis­tor.
Refer to 9-7.
"Test point
diagram and
voltage".

Refer to 9-6.
A "Check of
indoor fan
motor".

Refer to
"How to check
inverter/
compressor".

Refer to
"Check of
outdoor
thermistors".

Replace the
inverter P.C.
board or
the outdoor
electronic
control P.C.
board.

Left lamp
14-time flash
Cause:
Outdoor unit

• Other
abnormality

Check
"Flow chart of
the detailed
outdoor unit
failure mode
recall function."

Left lamp
4-time flash
Cause:
Indoor unit

• Trouble of
indoor unit
control
system

Replace the
indoor
electronic
control
P.C. board.

Refer to outdoor unit service manual.

Indoor unit operates.
Outdoor unit doesn't
operate normally.

If blinking of OPERATION
INDICATOR lamp cannot be
checked, it can be checked with
failure mode recall function.

w

"Test Run operation" means the
operation within 30 minutes after
EMERGENCY OPERATION switch
is pressed.

9-3. Instruction of troubleshooting

14

9-4. Troubleshooting check table

Not lighted

Blinking

OPERATION INDICATOR

Lighted

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.

· Flashing of OPERATION INDICATOR lamp (left-hand side lamp)
indicates abnormalities.

Abnormal

No.

1

2

point

Mis-Wiring
or serial
signal

Outdoor
control
system

Left lamp flashes.

0.5-second ON

0.5-second OFF

Left lamp lights up

SymptomOperation indicator lamp

Indoor unit
and outdoor
unit do not
operate.

Outdoor unit
does not
operate.

The serial signal from the outdoor unit is not
received for a maximum of 6 minutes.

It cannot properly read data in the nonvolatile
memory of the inverter P.C. board or the
outdoor electronic control P.C. board.

Condition

Correspondence

• Refer to 9-6.D "How to check
mis-wiring and serial signal

error".

• Check the blinking pattern of
the LED on the inverter P.C.
board or the outdoor electronic
control P.C. board.

Indoor coil
thermistor

3

Room
tempera­ture
thermistor

Indoor fan

4

motor

Indoor
control

5

system

Outdoor
power

6

system

Outdoor

7

thermistors

Outdoor
control

8

system

Other

9

abnormality

Left lamp flashes.
2-time flash

2.5-second OFF

Left lamp flashes.
3-time flash

2.5-second OFF

Left lamp flashes.
4-time flash

Left lamp flashes.
5-time flash

2.5-second OFF
Left lamp flashes.

6-time flash

2.5-second OFF

Left lamp flashes.
7-time flash

Left lamp flashes.
14-time flash

2.5-second OFF

2.5-second OFF

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.

Indoor unit
and outdoor
unit do not
operate.

Indoor unit
and outdoor
unit do not
operate.

Indoor unit
and outdoor
unit do not
operate.

Indoor unit
and outdoor
unit do not
operate.

The indoor coil or the room temperature
thermistor is short or open circuit.

The rotational frequency feedback signal is
not emitted during the indoor fan operation.

It cannot properly read data in the nonvolatile
memory of the indoor electronic control P.C.
board.

It consecutively occurs 3 times that the
compressor stops for overcurrent protection or
start-up failure protection within 1 minute after
start-up.

The outdoor thermistors short or open circuit
during the compressor operation.

It cannot properly read data in the nonvolatile
memory of the inverter P.C. board or the
outdoor electronic control P.C. board.

An abnormality other than above mentioned is
detected.

• Refer to 9-7.the
characteristics of indoor coil
thermistor, and the room
temperature thermistor.

• Refer to 9-6.A "Check of
indoor fan motor".

• Replace the indoor electronic
control P.C. board.

• Refer to "How to check of

inverter/compressor".
Refer to outdoor unit service
manual.

• Check the stop valve.

• Refer to "Check of outdoor

thermistor".
Refer to outdoor unit service
manual.

• Replace the inverter P.C.

board or the outdoor
electronic control P.C. board.
Refer to outdoor unit service
manual.

• Confirm the abnormality in

detail using the failure mode
recall function for outdoor
unit.

15

OPERATION INDICATOR

Not lighted

Blinking

Lighted

OPERATION INDICATOR

Not lighted

Blinking

Lighted

No.

1

SymptomOperation indicator lamp

Condition

Correspondence

Abnormal

point

0.5-second ON

0.5-second OFF

The electricity is not conducted to the interlock
switch (Fan) of the horizontal vane.

• Refer to 9-6.E "Check of
installation of the horizontal
vane".

Indoor unit
and outdoor
unit do not
operate.

Attachment
of the
horizontal
vane

All lamps flash at the same time.

No.

SymptomOperation indicator lamp

Condition

Correspondence

Abnormal

point

1

MXZ type

Operation
mode
setting

Outdoor unit
operates but
indoor unit
does not
operate.

The operation mode of the each indoor
unit is differently set to COOL(includes DRY)
and HEAT at the same time, 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

9-5. Trouble criterion of main parts

Part name FigureCheck method and criterion

Indoor fan motor(MF)

Measure the resistance with a tester.
Refer to 9-7."Test point diagram and voltage",

"Indoor electronic control P.C. board", the chart of thermistor.

Room temperature
thermistor(RT11)

Indoor coil thermistor
(RT12(MAIN), RT13(SUB))

Horizontal vane
motor(MV)

Normal

BRN-other one

Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)

235 " ~ 255 "

Color of the lead wire

Check 9-6. A.

RED

YLW
BRN

ORN

GRN

ROTOR

· 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.

MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA

16

w If more than 12 seconds or more passes after EMERGENCY OPERATION

switch is pressed, the voltage mentioned above 2 goes 0V DC although
the indoor electric control P.C. board is normal.

Indoor electronic
control P.C. board

Pay careful attention to the high voltage on
the fan motor connector CN211.

Yes

No

No

No
(Changed)

Yes
(Unchanged)

Is there any foreign matter that
interferes the rotation of the
line flow fan?

Turn OFF the power supply.

Remove the foreign matter and
adjust the line flow fan.

Turn ON the power supply, wait 5 seconds or more, and then press
EMERGENCY OPERATION switch.
Measure the supply voltage as follows within 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 OPERATION switch
is pressed?

Yes

Replace the indoor fan motor.

CN211

Replace the indoor electronic control P.C. board.

The indoor fan motor error has occurred, and the indoor fan repeats "12-second ON and 30-second OFF" 3 times, and then stops.

Measure the voltage between CN211
6(+) and 3(-) while the fan
motor is rotating.

Is it unchanged holding
0V DC or 15V DC?

Replace the indoor fan motor.

Replace the indoor electronic control P.C. board.

The indoor fan motor error has occurred, and the indoor fan doesn't operate.

9-6. Troubleshooting flow

When OPERATION INDICATOR lamp flashes 3-time.
Indoor fan does not operate.

A

Check of indoor fan motor

17

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

B

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?

Yes

Remove the batteries, then set them back
and press RESET button. (Refer to 9-1.4.)
Check if the unit operates with the remote
controller.

Does the unit operate with the
remote controller?

Yes

OK

No
(not clear)

No

Replace the batteries. (Refer to 9-1.4.)

Turn ON a radio to AM and press
OPERATE/STOP(ON/OFF) button on
the remote controller.

Is noise heard from radio?

Yes

Are there any fluorescent lights of
inverter or rapid-start type within
the range of 1m?

No

Replace the indoor electronic
control P.C. board.

No

Yes

Replace the remote controller.

● Reinstall the unit away from lights.

● Attach a filter on receiving part.

18

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

C

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.

Yes

Does the unit operate with the remote controller?
Does OPERATION INDICATOR lamp light up by
pressing EMERGENCY

Turn OFF the power supply.
Check both “parts side” and “pattern
side” of the indoor electronic control P.C.
board visually.

OPERATION switch?

No

Measure the resistance between CN211 3
and 4 of the indoor fan motor connector.

Measure the resistance of the horizontal vane
motor coil.
Refer to 9-5.

Replace the varistor(NR11) and fuse(F11).

Yes

Are the varistor(NR11) burnt
and the fuse(F11) blown?

Be sure to check both the fuse
and the varistor in any case.

Is the fuse(F11) blown only?

Yes

Measure the resistance between
1(+) and 3(-) of the indoor fan
motor connector.
w1,w2

Is the resistance 1M'
or more?

Yes

Replace the fuse (F11).

No

No

No

Short/open circuit:
Replace the indoor fan motor.

Short/open circuit:
Replace the horizontal vane motor and the indoor
electronic control P.C. board.

w1. The fan motor connector's 1 lead wire is red, whereas 3 is black.
w2. Connect "+" of the tester to fan motor connector's 1 lead

wire, and "-" to 3 lead wire, otherwise the resistance cannot be
measured properly.

Replace the fuse (F11) and the indoor fan motor.

Measure the resistance of cement
resistor R111 on the indoor electronic
control P.C. board.

Indoor electronic
control P.C.Board

Varistor(NR11)
Fuse(F11)
CN211

Is the resistance
approx. 4'?

Yes

Replace the indoor electronic control P.C. board.

No

Replace the indoor electronic control P.C. board
and the indoor fan motor.

19

• 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.

· Turn OFF inverter-controlled lighting
equipment.

· Turn OFF the power supply and then
turn ON again.

· Press EMERGENCY OPERATION
switch.

Is serial signal
error indicated
6 minutes later?

A

· Reinstall
either the
unit or the
light each
other away.

No

· Attach a filter
on remote
control
receiving

Yes

B

section of
the indoor
unit.

Is there rated voltage in
the power supply?

Yes

Turn ON the power supply.

Is there rated voltage between
outdoor terminal block S1 and
S2?

Yes

Press EMERGENCY OPERATION switch once.

Does the left lamp of OPERATION INDICATOR
lamp light up?
<Confirmation of the power to the indoor unit>

Is serial signal error indicated 6 minutes later?

Turn OFF the power supply.
Check once more if the indoor/outdoor
connecting wire is not mis-wiring.

B

Short-circuit outdoor terminal block S2 and
S3.
W1

Turn ON the power supply.

Does the LED on the inverter P.C. board
or the outdoor electronic contorol P.C. board
repeat "3.6-second-OFF and 0.8-second-ON
quick blinking"?

Turn 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.

Be sure to release the failure-mode
recall function after checking.

Refer to outdoor unit service manual.

Yes

Yes

A

W3

Yes

Yes

Yes

No

No

No

Check the power
supply.

Check the wiring.

No

Is there any mis-wiring,
poor contact, or wire

No

disconnection of the
indoor/outdoor
connecting wire?

No

W1. Mis-wiring may damage indoor electronic control
P.C. board during the operation.
Be sure to confirm the wiring is correct before the
operation starts.
W3.Be sure to check this within 3 minutes after turning
ON. After 3 minutes, LED blinks 6 times. Even when
the inverter P.C.board or the outdoor electronic control
P.C.board is normal, LED blinks 6 times after
3 minutes.
(Except for outdoor unit of multi system type)

Replace the inverter P.C. board or

No

(Lighted or
not lighted)

No

the outdoor electronic control P.C.board.

W2

W2 Be careful to the residual

voltage of smoothing capacitor.

Is there any error of the
indoor/outdoor connecting wire,
such as the damage of the wire,
intermediate connection, poor
contact to the terminal block?

No

Is there any error of the
indoor/outdoor connecting wire,
such as the damage of the wire,
intermediate connection, poor
contact to the terminal block?

No

Yes

Yes

Yes

Correct them.

Replace the
indoor/outdoor
connecting wire.

Replace the
indoor/outdoor
connecting wire.

20

Replace the
indoor electronic
control P.C. board.

Replace the
interlock switch(Fan).

Is the stopper of the horizontal vane
locked to the indoor unit correctly?

Yes

No

Is there resistance 0 "?

Relock 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 unit and outdoor unit do not operate.

Check of installation of the horizontal vane

E

21

Electromagnetic noise enters into TV sets or radios

Replace or repair the antenna.
Replace or repair the coaxial cable.

No

No

No

Yes

Yes

No

No

Yes

Yes

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?

Is the distance between the
TV sets or radios and the
indoor unit within 1m, or is
the distance between the TV
sets or radios and the
outdoor unit within 3m?

Are the antennas damaged?
Is the coaxial cable damaged?
Is there any poor contact in
the antenna wiring?

Is the indoor/outdoor
connecting wire of the air
conditioner and the wiring of
the antennas close?

Even if all of the above conditions are fulfilled, the electromagnetic noise may enter, depending on
the electric field strength or the installation condition (combination of specific conditions such as
antennas or wiring).
Check the followings before asking for service.

1.Devices affected by the electromagnetic noise
TV sets, radios (FM/AM broadcast, shortwave)

2.Channel, frequency, broadcast station affected by the electromagnetic noise

3.Channel, frequency, broadcast station unaffected by the electromagnetic noise

4.Layout of ;
indoor/outdoor unit 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 situation, check for
the electromagnetic noise.

2)Within 3 minutes after turning ON the power supply, press OPERATE/STOP (ON/OFF) button
on the remote controller for power ON, and check for the electromagnetic noise.

3)After a short time (3 minutes later after turning ON), the outdoor unit starts running. During
operation, check for the electromagnetic noise.

4)Press OPERATE/STOP (ON/OFF) button on the remote controller for power OFF, when the
outdoor unit stops but the indoor/outdoor communication still runs on. In this situation, check for
the electromagnetic noise.

After checking the above, consult the service representative.

Is the unit earthed?

Earth the unit.

Extend the distance between
the antennas and the indoor
unit, and/or the antennas and
the outdoor unit.

Extend the distance between
the TV sets and/or radios and
the indoor unit, or the TV sets
or radios and the outdoor unit.

Extend the distance between
the indoor/outdoor connecting
wire of the air conditioner and
the wiring of the antennas.

F

22

Indoor coil thermistor [RT12 (MAIN), RT13 (SUB)]
Room temperature thermistor (RT11)

Temperature (:)

Resistance (k")

9-7. Test point diagram and voltage

MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA

Indoor electronic control P.C. board

Varistor (NR11)

Release of Auto restart
function
Solder the Jumper wire
to JR07
(Refer to 8-3.)

Power supply input
230V AC Fuse(F11)

}

(T3.15AL250V)

R111

Indoor fan motor
(CN211)

1311V DC
3(-) Fiducial terminal of

cathode side on measur­ing high-voltage DC

415

V DC

5(+)3-6V DC
6(+)0V DC or 15V DC

Interlock switch(Fan)
(CN1R1)

5V DC

Power monitor
receiver P.C.
board

Emergency
operation switch

SW P.C. board

12V DC

Indoor coil thermistor
RT12(MAIN) 12
RT13(SUB) 34

(CN112)
Horizontal vane

motor(CN151)
Room temperature

thermistor(RT11)

Timer short mode
point JPG, JPS

}

(Refer to 8-1.)

23

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.

1Slide the sleeve.
2Pull the terminal while

pushing the locking
lever.

1Hold 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

DISASSEMBLY INSTRUCTIONS

MSZ-GA22VA MSZ-GA25VA MSZ-GA35VA
INDOOR UNIT

OPERATING PROCEDURE

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.

PHOTOS

Photo 1

Screws of the panel

Horizontal vane

24

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. (See Photo 3.)

(5) Remove the earth wire connected to the indoor

electronic control P.C. board from the electrical box.

(See Photo 4.)

(6) Unhook the power monitor receiver P.C. board holder from

the catch. (See Photo 4.)

(7) Open the rear cover of the power monitor receiver P.C.

board holder and pull out the power monitor receiver P.C.

board.
(8) Open the switch holder and pull out SW P.C. board.
(9) Pull the electronic control P.C. board slightly toward you

from the electrical box, and disconnect TAB3 and all the

connectors on the electronic control P.C. board.

(LD101 and LD105 are direct-mounted to the electronic

control P.C. board.)

(10)

Pull out the electronic control P.C. board from the electrical

box.
(11)

Remove the earth wire connected 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.

Photo 2

Screws of
the terminal
block cover

Drain hose

Photo 3

Screw of V.A. clamp

Switch holder

Screw of the
electrical cover.

3. Removing the electrical box

(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 and the electrical cover.

(See Photo 3.)

(4) Remove the earth wire connected to the heat exchanger

from the electrical box. (See Photo 4.)

(5) Disconnect the following connectors on the electronic

control P.C. board; the fan motor connector <CN211>, the
indoor coil thermistor connector <CN112>, the vane motor
connector <CN151>, the connector of the interlock switch
(Fan) of the horizontal vane <CN1R1>.

(6) Unhook the catches of the electrical box, and pull out the

electrical box.

Photo 4

Earth wire

Fan motor
connector (CN211)

Connector of the
interlock switch(Fan)
(CN1R1)

Indoor coil thermistor
connector (CN112)

Vane motor
connector (CN151)

Power monitor
receiver P.C.
board holder

25

OPERATING PROCEDURE PHOTOS

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.

(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.
(5) Loosen the screw fixing the line flow fan.
(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 out the indoor fan motor.
(8) Remove the screws fixing the left side of the heat

exchanger.
(9) Lift the heat exchanger, and pull out the line flow fan to the

lower-left.

(See Photo 8.)

(See Photo 6.)

(See Photo 7.)

Photo 5

Photo 6

Screws of
the motor
bed

Photo 7

Screws of the
horizontal vane
motor unit

Motor band

Screw of
the line
flow fan

Photo 8

Screws of the
left side of the
heat exchanger

26

PARTS LIST (non-RoHS compliant)11

No.

Part No.

Part name

Remarks

Symbol

in Wiring

Diagram

Q'ty/unit

1
2

3
4
5
6
7

8
9

10
11

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

KM05B

BOX
BOX
PANEL ASSEMBLY
SCREW CAP
FRONT PANEL
CATECHIN AIR FILTER (LEFT)
CATECHIN AIR FILTER (RIGHT)
AIR CLEANING FILTER
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
1

11111

1

1
1

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA
11-1. INDOOR UNIT STRUCTURAL PARTS

11-2. ACCESSORY AND REMOTE

CONTROLLER

1

2

3

4

5

11-1. INDOOR UNIT STRUCTURAL PARTS

9

10

11

8

7
(See 13.)

6

11-2. ACCESSORY AND REMOTE CONTROLLER

27

PARTS LIST (non-RoHS compliant)

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA

11-3. INDOOR UNIT ELECTRICAL PARTS

AND FUNCTIONAL PARTS

19

21

1

2

3
4

5

6

7

15

20

14
13

12

11

18

15

17

11-4. INDOOR UNIT HEAT EXCHANGER

23

24

22

28

10

9

8

15

16

BEARING MOUNT
SLEEVE BEARING
DRAIN HOSE
NOZZLE ASSEMBL Y
VANE MOTOR UNIT (HORIZONTAL)
INTERLOCK SWITCH(FAN)
HORIZONTAL VANE
FUSE
FUSE
VARISTOR
POWER MONITOR RECEIVER P.C. BOARD HOLDER
V.A. CLAMP
TERMINAL BLOCK COVER
TERMINAL BLOCK HOLDER
TERMINAL BLOCK
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
SWITCH HOLDER
INDOOR FAN MOTOR W2
MOTOR BAND
LINE FLOW FAN

UP & DOWN

T3.15AL250V
T3.15AL250V

AUTO RESTART
AUTO RESTART
AUTO RESTART

RC0J30-

MV

F11
F11

NR11

TB

RT11

RT12, RT13

MF

No. Part No.

Part name

Remarks

Symbol
in Wiring
Diagram

Q'ty/unit

1
2
3
4
5
6
7

8

9
10
11
12
13
14

15

16
17
18
19
20
21

22
23
24

INDOOR HEAT EXCHANGER
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
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

E02 913 620
E02 815 666
E02 151 667

1
1
1

W1 Including SW P.C. BOARD and POWER MONITOR RECEIVER P.C. BOARD
W2 Including FAN MOTOR RUBBER MOUNT (2 PCS/SET)

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

1
1
1

1
1
1

MSZ-GA22VA- MSZ-GA25VA- MSZ-GA35VA-

E1 E1 E1E2 E2 E2

PARTS LIST (non-RoHS compliant)

11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

11-4. INDOOR UNIT HEAT EXCHANGER

29

30

RoHS PARTS LIST (RoHS compliant)12

No.

Part No.

Part name

Remarks

Symbol

in Wiring

Diagram

Q'ty/unit

1
2
3
4
5
6
7
8
9

G
G
G
G
G
G
G
G
G

1011G

G

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

KM05B

BOX
PANEL ASSEMBLY
SCREW CAP
FRONT PANEL
CATECHIN AIR FILTER (LEFT)
CATECHIN AIR FILTER (

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

111

1

1
1

1
1

RoHS

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA
12-1. INDOOR UNIT STRUCTURAL PARTS

12-2. ACCESSORY AND REMOTE

CONTROLLER

1

2

3

4

5

12-1. INDOOR UNIT STRUCTURAL PARTS

9

10

11

8

7
(See 13.)

6

12-2. ACCESSORY AND REMOTE CONTROLLER

31

RoHS PARTS LIST (RoHS compliant)

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA

12-3. INDOOR UNIT ELECTRICAL PARTS

AND FUNCTIONAL PARTS

19

21

1

2

3
4

5

6

7

15

20

14
13

12

11

18

15

17

12-4. INDOOR UNIT HEAT EXCHANGER

23

24

22

32

10

9

8

15

16

BEARING MOUNT
SLEEVE BEARING
DRAIN HOSE
NOZZLE ASSEMBL Y
VANE MOTOR UNIT (HORIZONTAL)
INTERLOCK SWITCH(FAN)
HORIZONTAL VANE
FUSE
VARISTOR
POWER MONITOR RECEIVER P.C. BOARD HOLDER
V.A. CLAMP
TERMINAL BLOCK COVER
TERMINAL BLOCK HOLDER
TERMINAL BLOCK
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
SWITCH HOLDER
INDOOR FAN MOTOR W2
MOTOR BAND
LINE FLOW FAN

UP & DOWN

T3.15AL250V

AUTO RESTART
AUTO RESTART
AUTO RESTART
AUTO RESTART

RC0J30-

MV

F11

NR11

TB

RT11

RT12, RT13

MF

No. Part No.

Part name

Remarks

Symbol

in Wiring

Diagram

Q'ty/unit

1
2
3
4
5
6
7
8

9
10
11
12
13
14

15

16
17
18
19
20
21

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

22
23
24

G
G
G

INDOOR HEAT EXCHANGER
UNION (GAS)
UNION (LIQUID)

{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
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

E12 913 620
E12 815 666
E12 151 667

1
1
1

W1 Including SW P.C. BOARD and POWER MONITOR RECEIVER P.C. BOARD
W2 Including FAN MOTOR RUBBER MOUNT (2 PCS/SET)
W3 Serial number : ~6024700
W4 Serial number : 6024701~

Refer to 3.SPECIFICATION as for difference between W3 and W4.

1
1
1
1
1
1
1
1
1
1
1
1
1
1

1

W3

1

W4

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

MSZ-GA22VA- MSZ-GA25VA- MSZ-GA35VA-

E2 E2 E2E3 E3 E3

RoHS

RoHS PARTS LIST (RoHS compliant)

12-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

12-4. INDOOR UNIT HEAT EXCHANGER

33

MAC-093SS-E

Model Part No.

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA

Heat exchanger

13

Model

Part No.

MAC-415FT-E

MSZ-GA22VA
MSZ-GA25VA
MSZ-GA35VA

Air cleaning filter
(Blue bellows type)

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.

● 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.

Replacement of the air cleaning filter

(1) Remove the catechin air filter(left one)

The air cleaning filter is not attached
to the right side catechin air filter

(2) Remove the air cleaning filter(Blue

bellows type) from the catechin air filter.

13-2. QUICK CLEAN KIT

● You can sweep the surface of heat exchanger if you install the special-made brush to your vacuum cleaner.

34

35

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CC

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.