Mitsubishi OB452 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Wireless type
Models

No. OB452

MSZ-HA25VA ­MSZ-HA35VA -

E1

E1

Outdoor unit service manual

MUZ-HA·VA Series (OB453)

CONTENTS

1. TECHNICAL CHANGES ····································2

2. PART NAMES AND FUNCTIONS······················2

3. SPECIFICATION·················································4

4. NOISE CRITERIA CURVES·······························5

5. OUTLINES AND DIMENSIONS·························6

6. WIRING DIAGRAM ············································7

7. REFRIGERANT SYSTEM DIAGRAM················7

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

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

10. DISASSEMBLY INSTRUCTIONS·····················22

11. PARTS LIST······················································25

12. RoHS PARTS LIST···········································28

13. OPTIONAL PARTS ···········································31

NOTE:

This service manual describes technical data of the indoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.

1

Air outlet

Vertical vane

Air inlet

Operation Indicator
lamp

Front panel

Air filter (Anti-mold)

Horizontal vane

Remote controller

Remote control
receiving section

Emergency operation switch (E.O. SW)

TECHNICAL CHANGES

MSZ-GA25VA - ➔ MSZ-HA25VA -

MSZ-GA35VA - ➔ MSZ-HA35VA -

1. Indoor model has been changed.

2

PART NAMES AND FUNCTIONS

MSZ-HA25VA
MSZ-HA35VA

E1E1

E1E1

2

1
2
3
4
5
6

Installation plate
Installation plate fixing screw 4 o 25 mm
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
2
2
1
1

MSZ-HA25VA

Time set buttons

RESET button

Vane control button

Signal transmitting section

Operation display section

Temperature buttons

ON/OFF (operate/stop) button

Fan speed control button

Operation select button

Timer mode select button

ECONO COOL button

MSZ-HA35VA

ACCESSORIES

REMOTE CONTROLLER

3

3

INDOOR UNIT

Fuse
Horizontal vane motor
Varistor
Terminal block

(F11)

(MV)

(NR11)

(TB)

T3.15AL 250V

12V DC

ERZV14D471

3P

MSZ-HA25VA MSZ-HA35VA

Indoor model

Function

Power supply

Single phase

230V,50Hz

10

0.22
23

0.22

RCOJ 40-ED

788O295O225

9
4

43

38/32/26

4

MP06B

Single phase

230V,50Hz

10

0.22
23

0.22

RCOJ 40-ED

788O295O225

9
4

43

38/32/26

4

MP06B

Cooling

630

558/420/318

1110

1000/800/650

Heating

546

468/390/306

980

870/750/630

Cooling

630

558/420/318

1110

1000/800/650

Heating

660

546/426/306

1150

980/810/630

Air flow(Super High)
Air flow(High/Med./Low)
Power outlet
Running current ✽1
Power input ✽1
Fan motor current ✽1
Model
Dimensions WOHOD
Weight
Air direction
Sound level(Super High)
Sound level(High/Med./Low)
Fan speed(Super High)
Fan speed(High/Med./Low)
Fan speed regulator
Remote controller model

K /h
K /h

A
A

W

A

mm

kg

dB(A)
dB(A)

rpm
rpm

Electrical

data

Fan motor

Special

remarks

Capacity

SPECIFICATION

NOTE : Test conditions are based on ISO 5151

Cooling : Indoor Dry-bulb temperature 27

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
✽1 Measured under rated operating frequency.

:Wet-bulb temperature 19:

Specifications and rating conditions of main electric parts

4

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

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

COOLING

FUNCTION

43
43

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

INDOORUNIT

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

COOLING

FUNCTION

43
43

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

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

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

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NOISE CRITERIA CURVES

MSZ-HA25VA

MSZ-HA35VA

5

5

50

42

58

42

60753 128

295

58

42

2255

42

57

7459

41.5

214

235

253.5

18.5

320335

155 155

21540.5

254.5

5959 225 225

2

119

137

8

100

57

140

18

Piping

Insulation

[35 O.D

Liquid line

[6.35 - 0.5m (Flared connection [6.35)

Gas line

[9.52 - 0.43m (Flared connection [9.52)

Drain hose

Inslation[28 Connected part [16 O.D

Air in

Air out

Installation plate

Piping

Drain hose

11X26 Oblong hole

Installation plate

Indoor unit

Wall hole [65

788

11X20 Oblong hole

OUTLINES AND DIMENSIONS

MSZ-HA25VA
MSZ-HA35VA

Unit : mm

6

6

Indoor
heat
exchanger

Flared connection

Room temperature
thermistor
RT11

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

WIRING DIAGRAM

MSZ-HA25VA
MSZ-HA35VA

7

REFRIGERANT SYSTEM DIAGRAM

MSZ-HA25VA
MSZ-HA35VA

Unit : mm

7

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-HA25VA
MSZ-HA35VA

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 :

J2

J1

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.

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.

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.

8

JR07

Indoor electronic
control P.C. board

CN10A CN111CN151 CN112

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

9

Insert the minus pole of the
batteries first. Check if the polarity
of the batteries are correct.

Housing point

TROUBLESHOOTING

MSZ-HA25VA MSZ-HA35VA

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 P.C. board.

3) When removing the 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

3. Troubleshooting procedure

1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.
To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2) Before servicing check that the connector and terminal are connected properly.

3) If the 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 back lid and insert batteries.

Then reattach the back 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.

10

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 0.5-

second 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 upper 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 are emitted at the same timing
as the blinking of the upper 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 upper 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(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 in operation display section of the

remote controller is displayed after 3 seconds.

Deleting the abnormal memorized 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,
a short beep is emitted once as 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

11

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 emit during the 12-seconds the
indoor fan operation.

2-time flash

2.5-second OFF

Refer to the characteristics of the 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 mis-wiring
and serial signal error".

Serial signal

When 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 (9-7.).

Room temperature
thermistor

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

Not lighted —Normal —

Upper 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.).

12

9-3. Instruction of troubleshooting

Start

Indoor unit
operates.
Outdoor unit
doesn't
operate.

Outdoor unit
operates only
in Test Run
operation.

w

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

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

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

w

Refer to
"How to check
inverter/
compressor".

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

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

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

Indoor unit
operates, when
EMERGENCY
OPERATION
switch is pressed.

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

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

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

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
P.C. board and indoor
fan motor".

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.

Refer to outdoor unit service manual.

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

• Mis-wiring
or trouble
of serial signal

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

".

Upper

lamp
2-time flash
Cause:
Indoor unit

• Trouble of
room temp­ erature/
indoor coil
thermistor

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

Upper

lamp
3-time flash
Cause:
Indoor unit

• Trouble of
indoor fan
motor

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

Upper

lamp
4-time flash
Cause:
Indoor unit

• Trouble of
indoor unit
control
system

Replace the
indoor
electronic
control
P.C. board.

Upper

lamp
5-time flash
Cause:
Outdoor unit

• Outdoor
power
system
abnormality

Refer to
"How to check
inverter/
compressor".

Upper

lamp
6-time flash
Cause:
Outdoor unit

• Trouble of
thermistor
in outdoor
unit

Refer to
"Check of
outdoor
thermistors".

Upper

lamp
7-time flash
Cause:
Outdoor unit

• Trouble of
outdoor
control
system

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

Upper

lamp
14-time flash
Cause:
Outdoor unit

• Other
abnormality

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

13

No.

1

2

5

6

SymptomOperation indicator lamp Condition

Correspondence

Upper 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 outdoor unit service
manual.

• Refer to "How to check of

inverter/compressor".

Refer to outdoor unit service
manual.

• Check the stop valve.

• Replace the inverter P.C.

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

• Refer to 9-6.D "How to check

mis-wiring and serial signal

error".

3

Indoor fan
motor

7

Abnormal

point

Room
temperatur
e thermistor

Upper lamp flashes.
2-time flash

2.5-second OFF

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

• Refer to 9-7.the

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

Upper 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.

Upper lamp flashes.
5-time flash

2.5-second OFF
Upper lamp flashes.

6-time flash

2.5-second OFF

Other
abnormality

An abnormality other than above mentioned is
detected.

• Confirm the abnormality in

detail using the failure mode
recall function for outdoor
unit.

8

4

Upper 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.

• 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.

9

Outdoor unit
does not
operate.

Upper lamp lights up

Upper lamp flashes.
7-time flash

2.5-second OFF

Upper lamp flashes.
14-time flash

2.5-second OFF

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 (upper lamp)
indicates abnormalities.

14

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",

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

Room temperature
thermistor(RT11)

Indoor coil thermistor
(RT12)

Vane motor(MV)

Normal

RED-BLK

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.

BLK

BLK
RED

BLK

BLK

ROTOR

MSZ-HA25VA MSZ-HA35VA

15

Replace the indoor
power / terminal P.C. board

Replace the indoor
electronic control
P.C. board

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 P.C. board is normal.

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

Yes

Yes

Yes

Yes

No

No

No

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.

Replace the indoor power / terminal
P.C. board.

Replace the
indoor fan motor.

No

Replace the indoor
electronic control
P.C. board.

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 following voltage on the indoor
P.C. board. w
<Indoor power P.C. board>

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

2.Measure the voltage between CN211 5(+) and 3(–).
<Indoor electronic control P.C. board>

1.Measure the voltage between CN10A 6(+) and JPG(GND)(–).

No
(Changed)

Yes
(Unchanged)

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?

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

Is there 325V DC between
CN211 1 (+) and 3 (–) ?

Does the voltage between CN211
5 (+) and 3 (–) on the power
P.C. board rise to the range of 2V
to 6V DC within 12 seconds after
EMERGENCY OPERATION
switch is pressed?

Does the voltage between CN10A
6 (+) and JPG (GND)(–) on the
indoor electronic control P.C.
board fall to 2V or less within 12
seconds after EMERGENCY
OPERATION switch is pressed?

Yes (Unchanged)

No (Changed)

Replace the indoor fan motor.

Measure the voltage CN10A 2(+) and
JPG (GND)(–) on the indoor electronic
control P.C board when the fan motor
is rotaring.

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

JPG (GND)

CN10A

CN211

Indoor power P.C.board

Indoor electronic
control P.C. board

Fuse (F11)

Indoor terminal
P.C.board

Varistor
(NR11)

9-6. Troubleshooting flow

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

A

Check of indoor fan motor

16

Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller.

Check of remote controller and indoor electronic control 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?

No

Replace the indoor electronic
control P.C. board.
(including the receiver)

No

Yes

Replace the remote controller.

● Reinstall the unit away from lights.

● Attach a filter on receiving part.

17

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 P.C. board and indoor fan motor

C

Turn OFF the power supply.
Remove indoor fan motor connector CN211 from indoor
power P.C. board and vane motor connector CN151
from the indoor electronic control P.C. board and turn
ON the power supply.

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 terminal P.C.
board visually.

OPERATION switch?

No

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

Yes

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

Replace the varistor(NR11) and fuse(F11). w3

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 CN211 1(+) and 3(–)
of the indoor fan motor connector.
w1,w2

Short circuit:
Replace the indoor fan motor.

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

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.

Fuse (F11)

Indoor terminal
P.C.board

Measure the resistance of cement
resistance R111 on the indoor power
P.C. board.

Indoor electronic
control P.C.board

Indoor power P.C.board

Varistor
(NR11)

Is the resistance 1M'
or more?

Replace the fuse (F11). w3

JPG (GND)

CN10A

12VDC

5VDC

CN211

Replace the indoor power / terminal P.C. board.

R111

No

Replace the fuse (F11) and the indoor fan motor. w3

Yes

w3. Please replace the fuse after removing
the indoor terminal P.C. board from the electrical box.

Is the resistance
approx. 4'?

Yes

Is the approx. 5VDC between 5V (+)
and JPG(GND) (–) of the indoor
electronic control P.C.board? Is there
approx. 9V to 13VDC between 12V (+)
and JPG (GND) (–) of the indoor
electronic control P.C. board.

No

Are connector CN10A on
the indoor electronic control
P.C. board or lead wires
disconnected?

No

No

Yes

Replace the indoor power / terminal P.C. board
and the indoor fan motor.

Yes

Replace the indoor
electronic control P.C. board.

Connect the connector or repair
disconnection.

18

• When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch.
Indoor unit does not operate.

• When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second.
Outdoor unit does not operate.

D

How to check mis-wiring and serial signal error

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

Yes

Is serial signal error indicated 6 minutes later?

Yes

A

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 control P.C. board
repeat "3.6-second-OFF and 0.8-second-ON
quick blinking"? W3

Yes

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 indoor terminal block S2
and S3? <Confirmation of serial
signal>
Is there rated voltage between
indoor terminal block S1 and S2?
<Confirmation of power voltage>

Yes

Is there 2V DC or less between CN10A3(+)
and JPG(GND)(–) on the indoor electronic
control P.C. board?

Yes

Is there 2V DC or less between
CN10A4(+) and JPG(GND)(–)
on the indoor electronic control
P.C. board?

Replace the indoor power /
terminal P.C. board.

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

No

No

No

No

No

W1. Mis-wiring may damage indoor P.C. board during the

W3. Be sure to check this within 3 minutes after turning ON.

No

(Lighted or
not lighted)

Is there any error of the
indoor/outdoor connecting wire,

No

such as the damage of the wire,
intermediate connection, poor
contact to the terminal block?

No

Yes

Replace the indoor
electronic control P.C. board.

Check the power
supply.

Check the wiring.

operation.
Be sure to confirm the wiring is correct before the
operation starts.

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)

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

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

W2

W2 Be careful to the residual

voltage of smoothing capacitor.

Is there 2V DC or less between
CN10A4(+) and JPG(GND)(–)
on the indoor electronic control
P.C. board?

No

No

No

Yes

Make them correct.

Replace the

Yes

indoor/outdoor
connecting wire.

Yes

19

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 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, 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.

E

20

9-7. Test point diagram and voltage

MSZ-HA25VA MSZ-HA35VA

1. Indoor power P.C. board, Indoor terminal P.C. board

Indoor terminal P.C. board Indoor power P.C. board

Fuse (F11)(w)

Terminal
block

Connector to indoor electronic
control P.C. board. (CN20A)

w Please replace the fuse after removing the indoor terminal P.C. board from the electrical box.

Varistor (NR11)

5VDC

12VDC GND

R111

2. Indoor electronic control P.C. board

Timer short mode
point JPG JPS
(Refer to 8-1.)

Room temperature thermistor RT11 (CN111)

Indoor fan motor
(CN211)

1 325V DC
3 (–) GND (high-

voltage DC)

4 15V DC
5 (+)3-6V DC
6 (+)0-6V

Emergency operation
switch (E.O.SW) (SW1)

Indoor coil thermistor RT12(CN112) 23

Vane motor (CN151)

Connector to
Indoor power P.C. board
(CN10A)

12V DC

5V DC

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

Room temperature thermistor (RT11)
Indoor coil thermistor (RT12)

Resistance (k")

Temperature (:)

21

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-HA25VA MSZ-HA35VA

OPERATING PROCEDURE

1. Removing the panel

(1) Remove the screw caps of the panel. Remove the screws.

(2) Hold the lower ends part of the panel and pull it slightly
toward you, and then remove the panel by pushing it
upward.

PHOTOS

Photo 1

Screws of the panel

22

OPERATING PROCEDURE PHOTOS

2. Removing the indoor electronic control P.C. board
and the room temperature thermistor.

(1) Turn the breaker OFF.
(2) Remove the panel (Refer to 1) and the corner box.
(3) Open the indoor electronic control P.C. board holder

(to right side), and disconnect connectors of the indoor coil
thermistor (CN112), vane motor (CN151), and connector
(CN10A) to the indoor power P.C. board on the indoor
electronic control P.C. board.

(4) Unhook the catches of the indoor electronic control P.C.

board holder from the nozzle and the electrical box (right
side).

(5) Remove the room temperature thermistor from the hook of

the indoor electronic control P.C. board holder.

(6) Open the back side of the indoor electronic control P.C.

board holder, and remove the indoor electronic control
P.C. board.

(7) Remove the room temperature thermistor from the indoor

electronic control P.C. board.

3. Removing the indoor power P.C. board, the indoor
terminal P.C. board, and the electrical box

(1) Turn the breaker OFF.
(2) Remove the panel (Refer to 1) and the corner box.
(3) Remove the screw of V.A. clamp, and then the indoor/

outdoor connecting wire.

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

exchanger from the electrical box.

(5) Unhook first the lower, then the upper catches of the

electrical box, and pull out the electrical box.

(6) Remove the screw of the electrical cover and remove the

electrical cover.

(7) Disconnect all the connectors on the indoor power P.C.

board and unhook all lead wires.

(8) Remove the screw of terminal block on the indoor terminal

P.C. board.

(9) Remove the indoor power P.C. board and the indoor

terminal P.C. board.

Photo 2

Catch of indoor electronic
control P.C. board holder

Photo 3

Catch of indoor electronic
control P.C. board holder

Lower catch

Electrical box

Screw of the
electrical cover

V.A. clamp

Indoor coil
thermistor

Indoor electronic control
P.C. board holder

Terminal block

Indoor terminal
P.C. board

Indoor power
P.C. board

Upper catch

23

OPERATING PROCEDURE PHOTOS

4. Removing the vane motor

(1) Turn the breaker OFF.
(2) Remove the panel (Refer to 1) and the corner box.
(3) Remove the indoor electronic control P.C. board holder

(Refer to 2).

(4) Remove the screws of vane motor and remove the vane

motor.

(5) Disconnect the connector from vane motor.

5. Removing the indoor fan motor, the indoor coil
thermistor, and the line flow fan

(1) Remove the panel (Refer to 1) and the corner box.
(2)

Remove the indoor electronic control P.C. board holder (Refer to

2) and the electrical box (Refer to 3) .

(3)

Remove

remove the nozzle assembly.
(4) Loosen the screw fixing the line flow fan.
(5) Remove the screws fixing the motor bed. Lift the right side

of motor bed a little, and pull right to remove the fan motor

together with motor band/ bed.
(6) Remove the indoor coil thermistor from the heat exchanger
(w) Install the indoor coil thermistor in its former position when

assembling it. (Refer to Photo 2)
(7) Remove the screws fixing the left side of the heat

exchanger.
(8) Lift the left side of the heat exchanger, and pull out the line

flow fan to the lower-left.

the drain hose from the nozzle assembly, and

Photo 4

Screws of the vane motor

Photo 5

Screws of the line flow fan

Photo 6

24

Screws of the motor bed

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

MSZ-HA35VA -

E1

9

REMOTE CONTROLLER

MP06B

BOX
PANEL ASSEMBLY
SCREW CAP
FRONT PANEL
CATCH
AIR FILTER
CORNER BOX (RIGHT)
INSTALLATION PLATE

Including No.3,4
2PCS/SET

2PCS/SET
2PCS/SET

1
1
2
1
2
2
1
1

1
1
2
1
2
2
1
1

E02 A89 234
E02 A89 000
E02 913 067
E02 A89 010
E02 408 142
E02 A89 100
E02 A89 975
E02 A89 970

1

E02 A89 426

1

MSZ-HA25VA -

E1

MSZ-HA25VA
MSZ-HA35VA
11-1. INDOOR UNIT STRUCTURAL PARTS

11-2. ACCESSORY AND REMOTE

CONTROLLER

1

2

3

4

5

11-1. INDOOR UNIT STRUCTURAL PARTS

8

9

7

(See 13.)

6

11-2. ACCESSORY AND REMOTE CONTROLLER

25

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

UP & DOWN
AUTO RESTART
AUTO RESTART

T3.15AL250V

RC0J40-

MV

NR11

F11

RT11
RT12

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

E02 A89 509
E02 001 504
E02 897 702
E02 A89 235
E02 A89 040
E02 A89 303
E02 A89 452
E02 A90 452
E02 A89 095
E02 A89 784
E02 A89 780
E02 661 385
E02 A49 382
E02 A89 440
E02 A89 308
E02 A89 307
E02 A89 300
E02 A89 333
E02 A89 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

W1 Including TERMINAL BLOCK with TERMINAL P.C. BOARD
W2 Including FAN MOTOR RUBBER MOUNT (2 PCS/SET)

MSZ-HA35VA -

E1

MSZ-HA25VA -

E1

PARTS LIST (non-RoHS compliant)

MSZ-HA25VA
MSZ-HA35VA

11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

1
2

18

16

15

3

MOTOR BED

DRAIN
CAP

ELECTRICAL
BOX

4

ELECTRICAL
COVER

17

5

6

7

8

26

9

10 11

12

13

14

PARTS LIST (non-RoHS compliant)

MSZ-HA25VA
MSZ-HA35VA

11-4. INDOOR UNIT HEAT EXCHANGER

2

3

1

No. Part No.

E02 A89 620

1

E02 A90 620

2

E02 815 666

3

E02 151 667

Part name

INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
UNION (GAS)
UNION (LIQUID)

Symbol

in Wiring

Diagram

Q'ty/unit

MSZ-HA25VA -

1

1
1

E1

MSZ-HA35VA -

E1

1
1
1

Remarks

{9.52
{6.35

27

12 RoHS PARTS LIST (RoHS compliant)

No.

Part No.

Part name

Remarks

Symbol

in Wiring

Diagram

Q'ty/unit

1
2
3
4
5
6
7
8

MSZ-HA35VA -

E1

9

RoHS

G
G
G
G
G
G
G
G

G

REMOTE CONTROLLER

MP06B

BOX
PANEL ASSEMBLY
SCREW CAP
FRONT PANEL
CATCH
AIR FILTER
CORNER BOX (RIGHT)
INSTALLATION PLATE

Including No.3,4
2PCS/SET

2PCS/SET
2PCS/SET

1
1
2
1
2
2
1
1

1
1
2
1
2
2
1
1

E12 A89 234
E12 A89 000
E12 913 067
E12 A89 010
E12 408 142
E12 A89 100
E12 A89 975
E12 A89 970

1

E12 A89 426

1

MSZ-HA25VA -

E1

MSZ-HA25VA
MSZ-HA35VA
12-1. INDOOR UNIT STRUCTURAL PARTS

12-2. ACCESSORY AND REMOTE

CONTROLLER

1

2

3

4

5

6

12-1. INDOOR UNIT STRUCTURAL PARTS

8

7

(See 13.)

9

12-2. ACCESSORY AND REMOTE CONTROLLER

28

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

UP & DOWN
AUTO RESTART
AUTO RESTART

T3.15AL250V

RC0J40-

MV

NR11

F11

RT11
RT12

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

RoHS

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

E12 A89 509
E12 001 504
E12 897 702
E12 A89 235
E12 A89 040
E12 A89 303
E12 A89 452
E12 A90 452
E12 A89 095
E12 A89 784
E12 A89 780
E12 661 385
E12 A49 382
E12 A89 440
E12 A89 308
E12 A89 307
E12 A89 300
E12 A89 333
E12 A89 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

W1 Including TERMINAL BLOCK with TERMINAL P.C. BOARD
W2 Including FAN MOTOR RUBBER MOUNT (2 PCS/SET)

MSZ-HA35VA -

E1

MSZ-HA25VA -

E1

RoHS PARTS LIST (RoHS compliant)

MSZ-HA25VA
MSZ-HA35VA

12-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

1
2

18

16

15

3

MOTOR BED

DRAIN
CAP

ELECTRICAL
BOX

4

ELECTRICAL
COVER

17

5

6

7

8

29

9

10 11

12

13

14

INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
UNION (GAS)
UNION (LIQUID)

{9.52
{6.35

No. Part No.

Part name

Remarks

Symbol

in Wiring

Diagram

Q'ty/unit

1
2

3

RoHS

G
G
G
G

E12 A89 620
E12 A90 620
E12 815 666
E12 151 667

1
1
1

1

1
1

MSZ-HA35VA -

E1

MSZ-HA25VA -

E1

RoHS PARTS LIST (RoHS compliant)

MSZ-HA25VA
MSZ-HA35VA

12-4. INDOOR UNIT HEAT EXCHANGER

2

3

1

30

13

Model

Part No.

MAC-3003CF

MSZ-HA25VA
MSZ-HA35VA

MAC-1200RC

Model

Part No.

MSZ-HA25VA
MSZ-HA35VA

OPTIONAL PARTS

13-1. CATECHIN AIR FILTER

● The air filter contains a natural material, catechin, that is extracted from green tea. The catechin air filter deodorizes
odor and noxious gases such as formaldehyde, ammonia, and acetaldehyde. Moreover, it restrains the activity of
the viruses adhering to the filter.

● Clean the AIR FILTER about once every 2weeks. Cleaning way is same as way of AIR FILTER (ANTI-MOLD).

Refer to the instruction book.

● Clogged AIR FILTER may reduce the air conditioner capacity or cause frost on the air outlet.

13-2. REMOTE CONTROLLER HOLDER

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

CC

Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in Apr. 2006. No. OB452 6
Made in Japan

New publication, effective Apr. 2006
Specifications subject to change without notice.