Mitsubishi Electronics MSZ-GA22VA, MSZ-GA25VA, MSZ-GA35VA User Manual 2

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Wireless type
Models

E1

E1

E1

(WH)

(WH)

(WH)

MSZ-GA22VA ­MSZ-GA25VA ­MSZ-GA35VA -

No. OB378

Indication of model name

MSZ-GA22VA ­MSZ-GA25VA ­MSZ-GA35VA -

NOTE:

This service manual describes technical data of the indoor units.

•As for outdoor units MUZ-GA25VA- , MUZ-GA35VA- , MUZ-GA25VAH­and MUZ-GA35VAH- , refer to service manual OB379.

•As for outdoor units MXZ-3A54VA- , MXZ-4A71VA- and MXZ-4A80VA- ,

refer to service manual OB377.

E1

E1

E1

E1

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. OPTIONAL PARTS ···········································30

E1E1E1

E1E1E1

1

TECHNICAL CHANGES

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.

Generalized stepping motor

NOTE: Do not remove the vane motor from the motor unit.

Do not disassemble the horizontal vane motor unit.

E1E1
E1E1
E1E1

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).

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

INDOOR UNIT

MSZ-GA22VA ­MSZ-GA25VA ­MSZ-GA35VA -

E1

E1

E1

3

ACCESSORIES

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)

MSZ-GA22VA -

E1

MSZ-GA25VA -

E1

1
5
1
2
2
1
1

MSZ-GA35VA -

E1

INDOOR UNIT

MSZ-GA22VA ­MSZ-GA25VA ­MSZ-GA35VA -

Open the front lid.

E1

E1

E1

Signal transmitting section

Operation display section

OPERATE/STOP
(ON/OFF) button

Temperature buttons

Indication of
remote controller
model is on back

FAN SPEED CONTROL button

OPERATION SELECT button

ECONO COOL button

RESET button

(This diagram shows an overall view.)

4

OFF-TIMER button

ON-TIMER button

TIME SET buttons
FORWARD button
BACKWARD button

CLOCK SET button

VANE CONTROL button

3

T3.15AL 250V

MSBPC20M16 12V DC 250" (at 25˚C)

ERZV14D471

3P

INDOOR UNIT

Item

Model

Fuse
Horizontal vane motor
Varistor
Terminal block

MSZ-GA22VA -

E1

MSZ-GA25VA -

E1

MSZ-GA35VA -

E1

(F11)

(MV)

(NR11)

(TB)

MSZ-GA25VA -

E1

MSZ-GA22VA -

E1

MSZ-GA35VA -

E1

Indoor model

Function

Power supply

Single phase

230V,50Hz

10

0.25
33
—
57

0.25

RC0J30-CC

780O298O210

9
4

43

36W/29W/21

W

4
10
10
10

KM05B

Single phase

230V,50Hz

10

0.25
33
—
57

0.25

RC0J30-CC

780O298O210

9
4

43

36W/29W/21

W

4
10
10
10

KM05B

540

43

36W/29W/21

W

1,100

43

36W/29W/22

W

Cooling

600

480W/366W/234

W

1,200

1,000W/800W/580

W

Heating

630

504W/384W/258

W

1,250

1,040W/830W/620W

Cooling

600

480W/366W/234

W

1,200

1,000W/800W/580

W

Heating

630

504W/384W/258

W

1,250

1,040W/830W/620

W

Single phase

230V,50Hz

10

0.25
33
—
57

0.25

RC0J30-CC

780O298O210

9
4

43

36W/29W/22

W

4
10
10
10

KM05B

Cooling

600

480W/366W/246

W

1,200

1,000W/800W/600

W

Heating

630

504W/384W/270

W

1,250

1,040W/830W/640

W

Air flow(Super High)
Air flow(HighW/Med.W/LowW)
Power outlet
Running current ✽1
Power input ✽1
Auxiliary heater
Power factor ✽1
Fan motor current ✽1
Model
Dimensions WOHOD
Weight
Air direction
Sound level(Super High)
Sound level(HighW/Med.W/LowW)
Fan speed(Super High)
Fan speed(HighW/Med.W/LowW)
Fan speed regulator
Thermistor RT11(at25:)
Thermistor RT12(at25:)
Thermistor RT13(at25:)
Remote controller model

K /h
K /h

A
A

W

A(kW)

%

A

mm

kg

dB(A)
dB(A)

rpm
rpm

k"
k"
k"

Electrical

data

Fan motor

Special

remarks

Capacity

MSZ-GA25VA -

E1

MSZ-GA22VA -

E1

MSZ-GA35VA -

E1

Indoor model

Function

Cooling

438W/342W/240

W

930W/760W/580

W

Heating

420W/366W/258

W

900W/800W/620

W

Cooling

438W/342W/240

W

930W/760W/580

W

Heating

420W/366W/258

W

900W/800W/620

W

Cooling

600

480W/366W/246

W

1,200

1,000W/800W/600

W

Heating

618

504W/390W/270

W

1,230

1,040W/850W/640

W

Air flow(Super High)
Air flow(HighW/Med.W/LowW)
Sound level(Super High)
Sound level(HighW/Med.W/LowW)
Fan speed(Super High)
Fan speed(HighW/Med.W/LowW)

K /h
K /h

dB(A)
dB(A)

rpm
rpm

Special

remarks

Capacity

540

43

36W/29W/21

W

1,100

SPECIFICATION

When outdoor unit is MXZ type.

NOTE : Test conditions are based on ISO 5151

Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19:

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

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

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

Refrigerant piping length (one way): 5m
w Reference value

✽1 Measured under rated operating frequency.

Specifications and rating conditions of main electric parts

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:

NOISE CRITERIA CURVES

MSZ-GA22VA ­MSZ-GA25VA -

E1
E1

MSZ-GA35VA -

Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

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

90

80

70

60

50

40

30

E1

FAN SPEED

Super High

FUNCTION

COOLING

HEATING

SPL(dB(A))

43
43

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

APPROXIMATE

20

THRESHOLD OF
HEARING FOR
CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

INDOORUNIT

WALL

1m

0.8m

MICROPHONE

NC-20

6

5

OUTLINES AND DIMENSIONS

MSZ-GA22VA ­MSZ-GA25VA ­MSZ-GA35VA -

INDOOR UNIT

298

53.5
58

E1
E1
E1

780

19

11X26 Oblong hole

Installation plate

Indoor unit

102624.5

41.5 215

100

Air out

11X20 Oblong hole

335 320

Air in

210 5

or more7

155 155

Installation plate

90

106

Unit : mm

14273.5

5555 225 225

234

214

7055

42.5

Wall hole [65

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)

Insulation [28

287.5

3

159

Required space (Indoor unit)

75 or more

10 or more

75 or more

W

66 or more

In case of left, left back, or

W

left under piping (using spacer),

115 or more

7

6

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 THERMISTOR
INDOOR COIL THERMISTOR (MAIN)
INDOOR COIL THERMISTOR (SUB)
TRANSFORMER
TERMINAL BLOCK

WIRING DIAGRAM

MSZ-GA22VA ­MSZ-GA25VA ­MSZ-GA35VA -

INDOOR UNIT

TO OUTDOOR
UNIT
CONNECTING

E1

E1

E1

GRN

230V~

12-24V

LD104

CN

151

5

MV

MODELS WIRING DIAGRAM

TB

S1
S2
S3

CN

1R1

INTERLOCK
SWITCH(FAN)

TAB3

BLK
BLU

2

RED

1

CN201

2

POWER MONITOR
RECEIVER P.C.BOARD

F11

NR11

101(A)

DB111

LD

6

INDOOR ELECTRONIC
CONTROL P.C. BOARD

T111

LD

105(T)

2

SW P.C.
BOARD

CN

112

CN211

CN

111

4
3
2
1

1
2
3
4
5
6

RED

BLK

WHT

YLW

BLU

RT13
RT12

RT11

5

MF

7

REFRIGERANT SYSTEM DIAGRAM

MSZ-GA22VA ­MSZ-GA25VA ­MSZ-GA35VA -

INDOOR UNIT

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

E1

E1

E1

Refrigerant pipe [9.52
(with heat insulator)

Indoor coil

Indoor
heat
exchanger

thermistor
RT12(main)

Flared connection

Indoor coil
thermistor
RT13(sub)

Room temperature
thermistor
RT11

Unit : mm

Refrigerant flow in cooling
Refrigerant flow in heating

8

Flared connection

Refrigerant pipe [6.35
(with heat insulator)

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 -

E1

E1

E1

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 :

Remote controller model : KM05B

NOTE : For remodelling, take out

the batteries and press the
OPERATE/STOP(ON/OFF)
button twice or 3 times at
first.
After finish remodelling,
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”

1Turn 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 the following during servicing.

1) Before servicing the air conditioner, be sure to turn off the 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

E1E1E1

3. Troubleshooting procedure

RESET button

Insert the negative pole of the
batteries first. Check if the polarity
of the batteries are 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 will start the operation later 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

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

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 0.5-

second 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 sounds are emitted at the same timing
of 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 refer to confirm the
abnormal point(9-2. 2.).
Make sure to check at least two consecutive blinking cycles. W2

Turn ON the power supply.
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 since all LCD in operation display
section of the remote controller is displayed after 3 seconds.

Deleting the abnormal condition

1After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function" mentioned above.
2Press EMERGENCY OPERATION switch so that the memorized
abnormal condition is deleted.
3Release 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.
1With the remote controller headed towards the indoor unit, press any button
that is not used in this failure mode recall function (e.g. TIMER button) .
OR

1Turn OFF the power supply and turn ON it again.
2Press RESET button of the remote controller.

Judgment of indoor/outdoor abnormality

W1
Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature
is displayed).
With the remote controller headed towards the indoor unit, press TOO COOL or TOO
WARM button to adjust the set temperature to 24:.

Indoor unit is normal.
There is a possibility that the outdoor unit is abnormal.
Confirm the presence of abnormality according to the flow chart of the
detailed outdoor unit failure mode recall function.

The outdoor unit is abnormal.
Check the blinking pattern, and refer to confirm the abnormal point.
Make sure to check at least two consecutive blinking cycles. W3

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 since all LCD
in operation display section of the remote controller
is displayed after 3 seconds.

As for outdoor unit MUZ type, refer to service manual OB379.
As for outdoor unit MXZ type, refer to service manual OB377.

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 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 the indoor/outdoor unit failure mode recall function

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

When 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

When the rotational frequency feedback
signal is not emitted during 12-second the
indoor fan operation.

2-time flash

2.5-second OFF

Refer to the characteristic of the main
indoor coil thermistor, the sub indoor coil
thermistor (9-7.).

Indoor coil thermistor

When 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 miswiring
and serial signal error".

Serial signal error

When the serial signal from the 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 (9-7.).

Room temperature
thermistor

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

Not lighted –Normal –

Left lamp of

OPERATION

INDICATOR lamp

Check point

Abnormal point

(Failure mode)

Detection method

NOTE:Blinking patterns of this mode differs 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 in
only Test Run
operation.
w1

Outdoor unit
doesn't
operate
even in
Test Run
operation.
w1

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
(when
outdoor unit
doesn't work)".

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.

As for outdoor unit MUZ type,

refer to service manual OB379.
As for outdoor unit MXZ type,
refer to service manual OB377.

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.

w1
"Test Run operation" means the
operation within 30 minutes after
EMERGNCY OPERATION switch
is pressed.

9-3. Instruction of troubleshooting

14

No.

1

3

6

7

SymptomOperation indicator lamp Detection method

Check point

Left lamp flashes.

0.5-second ON

0.5-second OFF

Mis-Wiring
or serial
signal

Outdoor
power
system

Outdoor
thermistors

Outdoor
control
system

Indoor coil
thermistor

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

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

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

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

• Refer to "Check of outdoor
thermistor".

Refer to service manual
OB379 or OB377.

• Refer to "Check of inverter/
compressor".

Refer to service manual
OB379 or OB377.
Check the stop valve.

• Replace the inverter P.C.

board or the outdoor

electronic control P.C. board.

Refer to service manual

OB379 or OB377.

• Refer to 9-6.D "How to check

mis-wiring and serial signal

error".

4

Indoor fan
motor

8

Abnormal

point

Room
tempera­ture
thermistor

Left lamp flashes.
2-time flash

2.5-second OFF

When the indoor coil or the room temperature
thermistor is shorts or opens circuit.

• Refer to 9-7.the

characteristics of indoor coil
thermistor, and the room
temperature thermistor.

Left lamp flashes.
3-time flash

2.5-second OFF

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

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

Indoor unit
and outdoor
unit 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 the failure mode
recall function.

Indoor unit
and outdoor
unit do not
operate.

Indoor unit
and outdoor
unit do not
operate.

9

5

Left lamp flashes.
4-time flash

2.5-second OFF

Indoor
control
system

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

Indoor unit
and outdoor
unit do not
operate.

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

Outdoor
control
system

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

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

2

Outdoor unit
does not
operate.

Left lamp lights up

Left lamp flashes.
7-time flash

2.5-second OFF

Left lamp flashes.
14-time flash

2.5-second OFF

9-4. Troubleshooting check table

Not lighted

Blinking

OPERATION INDICATOR

Lighted

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

NOTE : Before taking measures, make sure that the symptom reappears for accurate troubleshooting.

Self check table

NOTE : When the indoor unit has started operation and the above 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.

15

OPERATION INDICATOR

Not lighted

Blinking

Lighted

OPERATION INDICATOR

Not lighted

Blinking

Lighted

No.

1

SymptomOperation indicator lamp Detection method

Check point

Abnormal

point

0.5-second ON

0.5-second OFF

When 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 Detection method

Check point

Abnormal

point

1

MXZ type

Operation
mode
setting

Outdoor unit
operates but
indoor unit
does not
operate.

When 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 service manual
OB377.

2.5-second OFF

Right lamp flash

· Flashing of OPERATION INDICATOR lamp (all lamps) indicates abnormality.

Part name FigureCheck method and criterion

Indoor fan motor(MF)

Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C)

Normal

8 k" ~ 20 k"

Abnormal

Open or short-circuit

Room temperature
thermistor(RT11)

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

Horizontal vane
motor(MV)

Normal

BRN-other one

Abnormal

Open or short-circuit

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

NOTE : Before taking measures, make sure that the symptom reappears for accurate troubleshooting.

Self check table

· Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates
abnormality.

· OPERATION INDICATOR lamp (left-hand side lamp) is lighted.

NOTE : When the indoor unit has started operation and the above 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.

9-5. Trouble criterion of main parts

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

E1E1E1

16

wIf 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

Changed

Unchanged

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

Turn OFF the power supply.
Insert a stick such as a screw driver
into the air outlet, and check if there is
any catch in the rotation of the line
flow fan.

Adjust the line flow fan and
remove the foreign matter.

w

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.

1.Measure the voltage between CN211 1(+) and 3(-).

2.Measure the voltage between CN211 5(+) and 3(-).

Is there 311V 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" 3times, 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.

Switch 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 switch 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?

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

w3. Short circuit:
The indoor fan motor is
abnormal.

Measure the resistance between CN211 3
and 4 of the indoor fan motor connector.
Normal value is approx. 30k' to 50k'.

Measure the resistance of the horizontal vane
motor coil.
Normal value is approx. 300' to 250'.

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?

w1,2

Yes

Measure the resistance between
1(+) and 3(-) of the indoor fan
motor connector (to CN211 on the
indoor electronic control P.C. board) .

w3

Is the resistance 1M'
or more?

Yes

Replace the fuse (F11).

No

No

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.

No

Short circuit:
Replace the indoor fan motor.

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

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

Indoor electronic
control P.C.Board

Measure the cement resistance R111 on
the 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 POWER lamp flashes ON and OFF in every 0.5-second.

Is there rated voltage of
230V AC in the power
supply?

In 3 minutes after turning ON the
power supply of the outdoor unit, does
the LED on the inverter P.C. board
repeat quick blinking "3.6-second-OFF
and 0.8-second-ON"?
Be sure to check above in 3 minutes
after turning ON. After 3 minutes, LED
blinks 6 times. When the inverter P.C.
board is normal, LED also blinks 6
times after 3 minutes.

Is there any mis-wiring,
poor contact, or wire
disconnection of the
indoor/outdoor
connecting wire?

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.

(Lighting)

No

Yes

No

Yes

Yes

No

Yes

No

Yes

No

W2 Be careful to the residual
voltage of smoothing capacitor.

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

No

No

Yes

No

Yes

Serial signal error display

Yes

Yes

No

Yes

As for outdoor unit MUZ type,refer to service manual OB379.
As for outdoor unit MXZ type,refer to service manual OB377.

Inverter P.C.board
(Parts side)

LED

Blinking

Turn OFF the power supply.

Turn ON the power supply.

Is there 230V AC between
outdoor terminal block S1 and
S2?

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

Press EMERGENCY OPERATION switch.

Check the power
supply.

Is the self-check of the indoor unit displayed 6
minutes after?

The left lamp of
OPERATION
INDICATOR lamp
blinks quickly.

A

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

Short-circuit outdoor terminal block S2 and
S3.
W1

B

Turn ON the power supply of the outdoor unit.

Check the wiring.

Make them sure.

Remove the short-circuit between
outdoor terminal block S2 and S3.
Is there amplitude of 10 to 20V DC
between outdoor terminal block S2
and S3? <Confirmation of serial
signal>

Is there 230V AC between outdoor
terminal block S1 and S2?
<Confirmation of power voltage>

Replace the indoor electronic control P.C. board.

Replace the inverter
P.C. board.
W2

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?

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?

Replace the
indoor/outdoor
connecting.

Replace the
indoor/outdoor
connecting.

Is serial signal
error indicated
6 minutes later?

Yes

No

· Turn OFF inverter-controlled lighting
equipment.

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

· Press EMERGENCY OPERATION
switch.

B

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

· Attach a filter
on receiving
section of
the indoor
unit.

A

Outdoor unit does not operate.

D

How to check mis-wiring and serial signal error

20

Start

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 lamp 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 the antennas.
Replace 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?

Is there any antennas damage
by rust or something , coaxial
cable damage, or poor
contact such as loosing of
the connectors or wire
disconnection of wiring of the
antennas?

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

Even if all of the above conditions is 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, or the antennas and the
outdoor unit.

Extend the distance between
the TV sets 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

9-7. Test point diagram and voltage

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

Indoor electronic control P.C. board

Power supply input

Varistor (NR11)

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

230V AC Fuse(F11)

E1E1E1

}

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)

Power monitor
receiver P.C.
board.

Emergency
operation switch

SW P.C. board

12V DC

5V 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.)

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

23

Resistance (k")

Temperature (:)

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.

Photo 1

Horizontal vane

E1E1E1

PHOTOS

Screws of the panel

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 ground 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 ground 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 ground 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

Ground wires

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

26

Screw of
the line
flow fan

Photo 8

Screws of the
left side of the
heat exchanger

PARTS LIST11

MSZ-GA22VA - (WH)
MSZ-GA25VA - (WH)
MSZ-GA35VA - (WH)

E1

E1

E1

11-1. INDOOR UNIT STRUCTURAL PARTS

1

2

3

4

9

8

7
(See 12.)

11-2. ACCESSORY AND REMOTE

CONTROLLER

10

11

5 6

11-1. INDOOR UNIT STRUCTURAL PARTS

Symbol

No.

E02 897 234

1

E02 915 000

2

E02 913 067

3

E02 915 010

4

E02 915 100

5

E02 916 100

6

7

E02 913 975

8

E02 913 970

9

Part No.

Part name

BOX
PANEL ASSEMBLY (WH)
SCREW CAP
FRONT PANEL (WH)
CATECHIN AIR FILTER (LEFT)
CATECHIN AIR FILTER (RIGHT)
AIR CLEANING FILTER
CORNER BOX (RIGHT)
INSTALLATION PLATE

in Wiring

Diagram

11-2. ACCESSORY AND REMOTE CONTROLLER

E02 915 426

10

E02 527 083

11

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

Q'ty/unit

MSZ-GA22VA -

E1

MSZ-GA25VA -

(WH) (WH)

1
1
2
1
1
1
1
1
1

1
1

E1

(WH)

1
1
2
1
1
1
1
1
1

1
1

MSZ-GA35VA -

E1

1
1
2
1
1
1
1
1
1

1
1

Including No.3,4
2PCS/SET

MAC-415FT-E

KM05B

Remarks

27

MSZ-GA22VA - (WH)
MSZ-GA25VA - (WH)
MSZ-GA35VA - (WH)

E1

E1

E1

11-3. INDOOR UNIT ELECTRICAL PARTS

AND FUNCTIONAL PARTS

1

2

3
4

5

INTERLOCK
SWITCH (FAN)

6

7

POWER MONITOR
RECEIVER P.C. BOARD

15

21

20

19

18

14
13

12

11

SW P.C. BOARD

15

17

11-4. INDOOR UNIT HEAT EXCHANGER

23

24

22

28

10

9

VARISTOR

8

FUSE

15

ROOM
TEMPERATURE
THERMISTOR

16

11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

Symbol

No. Part No.

E02 751 509

1

E02 001 504

2

E02 897 702

3

E02 915 235

4

E02 897 303

5

E02 897 316

6

E02 913 040

7

E02 127 382

8

E02 661 385

9

E02 915 095

10

E02 897 784

11

E02 897 780

12

E02 897 779

13

E02 913 375

14

E02 915 452
E02 916 452

15

E02 917 452
E02 897 308

16

E02 913 307

17

E02 915 782

18

E02 915 300

19

E02 897 333

20

E02 897 302

21

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

BEARING MOUNT
SLEEVE BEARING
DRAIN HOSE
NOZZLE ASSEMBLY
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
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
SWITCH HOLDER
INDOOR FAN MOTOR W2
MOTOR BAND
LINE FLOW FAN

Part name

in Wiring

Diagram

NR11

RT11

RT12, RT13

MSZ-GA22VA - E1MSZ-GA25VA - E1MSZ-GA35VA -

MV

F11

TB

MF

(WH)

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

1
1
1
1
1
1

Q'ty/unit

(WH)

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

1

1
1
1
1
1
1

11-4. INDOOR UNIT HEAT EXCHANGER

E02 913 620

22
23

E02 815 666

24

E02 151 667

INDOOR HEAT EXCHANGER
UNION (GAS)
UNION (LIQUID)

1
1
1

1
1
1

(WH)

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

1
1
1
1
1
1
1

1
1
1

E1

Remarks

UP & DOWN

3.15A

AUTO RESTART
AUTO RESTART
AUTO RESTART

RC0J30-

{9.52
{6.35

29

12

Model

Part No.

E1
E1

MAC-415FT-E

MSZ-GA22VA­MSZ-GA25VA­MSZ-GA35VA-

E1

Air cleaning filter
(Blue bellows type)

OPTIONAL PARTS

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.

30

31

HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN

CC

Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in Jan. 2005. No. OB378 6
Made in Japan

New publication, effective Jan. 2005
Specifications subject to change without notice.