Mitsubishi MSZ-FA25VA - E1, MSZ-FA25VA - E2, MSZ-FA25VA - E3, MSZ-FA35VA - E1, MSZ-FA35VA - E2 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Wireless type
Models

Revision:B

E3

● model has been added.

● 9-2. Failure mode recall function has been

changed.

● RoHS PARTS LIST has been added.
Please void OB371 REVISED EDITION-A.

No. OB371

REVISED EDITION-B

MSZ-FA25VA ­MSZ-FA25VA ­MSZ-FA25VA ­MSZ-FA35VA ­MSZ-FA35VA ­MSZ-FA35VA -

E1

E2

E3

E1

E2

E3

Outdoor unit service manual
MUZ-FA·VA(H) Series (OB372)
MXZ-A·VA Series (OB377)
MXZ-8A140VA1 (OC316)

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················3

3. SPECIFICATION·················································5

4. NOISE CRITERIA CURVES·······························6

5. OUTLINES AND DIMENSIONS·························7

6. WIRING DIAGRAM ············································8

7. REFRIGERANT SYSTEM DIAGRAM················8

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

9. TROUBLESHOOTING ······································11

10. DISASSEMBLY INSTRUCTIONS·····················31

11. PARTS LIST······················································35

12. RoHS PARTS LIST···········································39

13. OPTIONAL PARTS ···········································42

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.

Revision:A

E2

• model has been added.
Color of BOX and CORNER BOX has been changed to white.

Revision:B

E3

• model has been added.

•9-2. Failure mode recall function has been changed.

•RoHS PARTS LIST has been added.

1

MSZ-A09YV - ➔ MSZ-FA25VA ­MSZ-A12YV - ➔ MSZ-FA35VA -

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

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

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

4. Power supply cord has been removed.

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

6. Position of terminal block has been changed.

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

8. Indoor heat exchanger has been changed.

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

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

TECHNICAL CHANGES

E1E1
E1E1

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

Do not disassemble the horizontal vane motor unit.

Generalized stepping motor

Generalized stepping motor

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

Do not disassemble the vertical vane motor unit.

11. Front panel driving motor unit which opens and closes the front panel has been added.

Front panel opening/closing

output gear

NOTE: Do not disassemble the front panel driving motor unit.

12. PLASMA DEODORIZING/AIR PURIFYING filter units have been added.

13. i-see Sensor has been added.

(i-see control operation and AREAsetting have been added.)

14. Air cleaning filer has been removed.

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

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

2

Line flow fan

Air outlet

Vertical vane

Air inlet

Display section

Front panel

PLASMA DEODORIZING filter

Panel

Heat exchanger

Horizontal vane

Operation section

(When the front panel is opened)

Remote controller

POWER lamp

Remote control
receiving section

PLASMA AIR PURIFYING filter

Anti-mold air filter

Fan guard

i-see Sensor

PLASMA/WASH lamp

AREA lamp

Emergency operation
switch

WASH reset switch

Auto front panel

When the unit starts operating, the
front panel opens automatically to
draw in air. When the unit stops
operating, the front panel closes
automatically.

AREA lamp indicate AREA setting

In AREA setting, the horizontal air flow
direction changes automatically according
to the detection of i-see Sensor which detects
the floor/ wall temperature to air-condition
the room evenly.

i-see control operation

i-see sensor constantly measure
floor/wall temperature to automatically
adjust to the set temperature by
estimating the temperature
actually perceived by a
person inside the room
("sensible temperature").

<Open> <Closed>

Auto front panel

MSZ-FA25VA- ➔ MSZ-FA25VA­MSZ-FA35VA- ➔ MSZ-FA35VA-

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

E2E1
E2E1

MSZ-FA25VA- ➔ MSZ-FA25VA­MSZ-FA35VA- ➔ MSZ-FA35VA-

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

E2E1

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

E3

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

2

PART NAMES AND FUNCTIONS

E3E2
E3E2

MSZ-FA25VA
MSZ-FA35VA

3

1
2
3
4
5
6
7

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

1
5
1
2
2
1
1

ON-TIMER button

CLOCK SET button

TIME SET buttons
FORWARD button
BACKWARD button

VANE CONTROL button
(Horizontal vane button)

OFF-TIMER button

i-see button

(This diagram shows an overall view.)

Open the front lid.

PLASMA button

AREA button

RESET button

WIDE VANE button
(Vertical vane button)

Signal transmitting section

Operation display section

Temperature buttons

OPERATE/STOP
(ON/OFF) button

FAN SPEED CONTROL button

OPERATION SELECT button

ECONO COOL button

Indication of
remote controller
model is on back

MSZ-FA25VA
MSZ-FA35VA

ACCESSORIES

REMOTE CONTROLLER

4

3

T3.15AL250V

NSEJ001DA1 12V DC 100" (at 25˚C)

MP20Z 12V DC 300" (at 25˚C)

MSBPC20M16 12V DC 250" (at 25˚C)

MSBPC20M11 12V DC 300" (at 25˚C)

ERZV14D471

A2TPMI334F0V50HSOBA060P5L1J4S 5V DC

3P

Item
Fuse
Front panel driving motor
i-see Sensor motor
Horizontal vane motor
Vertical vane motor
Varistor
i-see Sensor
Terminal block

(F11)

(MP)

(MT)
(MV1)
(MV2)

(NR11)

(RR)

(TB)

MSZ-FA25VA

MSZ-FA35VA

Indoor model

Function

Power supply

Single phase

230V,50Hz

10

0.25
33
57

0.25

RC0J40-EB or RC0J30-CC

780O298O198

10

4

42

36/29/21

4

KM05A

Cooling

594

474/354/252

1,220

1,010/800/610

Heating

612

498/384/264

1,250

1,050/850/640

Single phase

230V,50Hz

10

0.25
33
57

0.25

RC0J40-EB or RC0J30-CC

780O298O198

10

4

42

36/29/22

4

KM05A

Cooling

594

474/354/258

1,220

1,010/800/630

Heating

612

498/384/276

1,250

1,050/850/660

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

MSZ-FA25VA

MSZ-FA35VA

Indoor model

Function

Cooling

546

450/348/252

1,130

960/790/610

Heating

540

420/372/264

1,120

910/830/640

Cooling

516/390/258

1,080/860/630

Heating

522/402/276

1,090/880/660

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

K /h
K /h

dB(A)
dB(A)

rpm
rpm

Special

remarks

Capacity

42

36/29/21

642

42

36/29/22

1,300

SPECIFICATION

When outdoor unit is MXZ-8A140VA

NOTE : Test conditions are based on ISO 5151

Specifications and rating conditions of main electric parts

1 type.

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

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

✽1 Measured under rated operating frequency.

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

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

COOLING

FUNCTION

42
42

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:

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

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

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

COOLING

FUNCTION

42
42

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

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

NOISE CRITERIA CURVES

MSZ-FA25VA

MSZ-FA35VA

6

5

780

155 155

335 320

41.5 215

42.5

214

3 287.5

7055

5555 225 225

298

90

106

or more7

100

198 5

53.5 102624.5
19

159

58

234

14273.5

Air in

Air out

Wall hole

[65

Indoor unit

Installation plate

Installation plate

11o20 Oblong hole

11o26 Oblong hole

10 or more

75 or more

55 or morew

75 or more

wIn case of left, left back, or

left under piping (using spacer),

113 or more

Insulation [28

Drain hose [16
(Connected part O.D)

Liquid line [6.35 - 0.5m
Gas line [9.52 - 0.43m
Insulation [35 O.D
[19 I.D

{

Required space (Indoor unit)

Wireless remote controller

OUTLINES AND DIMENSIONS

MSZ-FA25VA
MSZ-FA35VA

Unit : mm

7

6

Indoor
heat
exchanger

Flared connection

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT13(sub)

Flared connection

Refrigerant flow in cooling
Refrigerant flow in heating

Refrigerant pipe [9.52
(with heat insulator)

Refrigerant pipe [6.35
(with heat insulator)

Indoor coil
thermistor
RT12(main)

Indoor
heat
exchanger

Flared connection

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT13(sub)

Flared connection

Refrigerant pipe [9.52
(with heat insulator)

Refrigerant pipe [6.35
(with heat insulator)

Indoor coil
thermistor
RT12(main)

SYMBOL

DB111

F11

MF

MP
MT

MV1

SYMBOL

MV2

NR11
PLASMA_A
PLASMA_D

RR

RT11

SYMBOL

RT12
RT13

T111

TB

NAME
DIODE STACK
FUSE (T3.15AL250V)
INDOOR FAN MOTOR
FRONT PANEL DRIVING MOTOR
i-see Sensor MOTOR
VANE MOTOR (HORIZONTAL)

NAME
VANE MOTOR (VERTICAL)
VARISTOR
PLASMA AIR PURIFYING FILTER UNIT
PLASMA DEODORIZING FILTER UNIT
i-see Sensor
ROOM TEMPERATURE THERMIST OR

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

1

2

3

4

S2

8

230V~

BLU

INDOOR ELECTRONIC
CONTROL P.C. BOARD

33

PLASMA_DPLASMA_A

SAFETY DEVICE
(PLASMA UNIT)

MP

RR

5

4

MT

SW P.C.
BOARD

POWER MONITOR
RECEIVER P.C. BOARD

INTERLOCK
SWITCH(FAN)

5

5

MV2

MV1

TO OUTDOOR
UNIT
CONNECTING

BLK

RED

S3

TB

TAB3

DB111

NR11

F11

5

6

4

2

5

CN

1U1

2

CN

1T2

CN

1T1

CN

110

3

LD

105(T)

LD

101(A)

12-24V

RT13

2

1R1

CN

GRN

LD104

CN201

2
1

151

CN

T111

RED

WHT

111

CN

CN

112

CN211

BLU

YLW

BLK

MF

RT11

RT12

1
3
5

S1

WIRING DIAGRAM

MSZ-FA25VA
MSZ-FA35VA

NOTE:1. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.

2. Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

7

MSZ-FA25VA

REFRIGERANT SYSTEM DIAGRAM

MSZ-FA35VA

8

Unit : mm

8

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

1 unit operation
No modification

–
–
–

2 units operation

Same as at left

Solder J1

–
–

3 units operation

Same as at left
Same as at left

Solder J2

–

4 units operation

Same as at left

Same as at left

Same as at left

Solder both J1 and J2

SERVICE FUNCTIONS

MSZ-FA25VA
MSZ-FA35VA

8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-7.)
Set time : 1-minute ➔ 1-second
Set time : 3-minute ➔ 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is

shortened by short circuit of JPG and JPS.)

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

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

How to modify the remote controller P.C. board

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

NOTE : For 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 only accepts 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.

8-3. 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.)

9

How to release “AUTO RESTART FUNCTION”

JR07

CN151 CN211CN112 CN1R1

CN212

CN1T1CN1T2

CN130

IC156

8-4. Remote controller

Be sure to set the slide switch inside the remote controller to an appropriate position in accordance with the
installed position of the indoor unit. If the switch is not set correctly, the air conditioner may not function properly.

Area Left Center Right

Position of

the slide

switch

Display on

the remote

controller

Where is the indoor unit installed in your room?

Installed at left , if the
distance is not more
than 50 cm.

NOTE:If the indoor unit is installed more than 50 cm away from the side walls, cabinets or other nearby objects, set the slide

switch to the “center” position.

Installed at right, if the
distance is not more
than 50 cm.

Is the indoor unit in­stalled at right, left or
center?

(Left) (Center) (Right)

Side swich

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 works 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.

10

21

Stopper

Lock.

Left

Insert this end first.

9

RESET button

Housing point

TROUBLESHOOTING

MSZ-FA25VA
MSZ-FA35VA

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 main unit first with the remote controller, and then after
confirming the horizontal vane is closed, turn OFF the breaker and / or disconnect the power plug.

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

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

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

3. Troubleshooting procedure

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

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

3) If the electronic control P.C. 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.

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

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.

Lead wiring

2 Press RESET button with tip end of ball point pen

or the like, and then use the remote controller.

NOTE: Before installation of the horizontal vane, turn OFF the power supply.

11

22

In procedure

stoppers until they click
into place.

lock the

WASH

reset

E.O.
SW

Plasma
element
holder

6. How to remove and install PLASMA DEODORIZING / AIR PURIFYING filter units

If PLASMA/WASH lamp on the indoor unit blinks, clean the filters as soon as possible. The lamp will start blinking when
accumulated operating time exceeds 330 hours.

<Remove>

Figure 1.

(1) Switch the indoor unit OFF with the remote controller and

disconnect the power supply plug and/ or turn OFF the
breaker.
NOTE: Otherwise, you may get injured since PLASMA

DEODORIZING/AIR PURIFYING filter units are
charged with high voltage.

(2) Hold the knobs on both sides of the front panel and lift the

panel up until its level.
(3) Remove the anti-mold air filter.(See Figure 1.)
(4) Remove PLASMA DEODORIZING/AIR PURIFYING filter

units. (See Figure 2.)

Figure 2.

<Install>

Install PLASMA DEODORIZING/AIR PURIFYING filter units by following the removal procedure in reverse.
(1) Insert the top of PLASMA DEODORIZING/AIR PURIFYING filter

units into the aperture in the plasma element holder.

Figure 3.

(See Figure 3.)

(2) Push in PLASMA DEODORIZING/AIR PURIFYING filter units

until they click into place.

•The front panel does not close if PLASMA DEODORIZING/AIR
PURIFYING filter units are not installed properly.

(3) Install the anti-mold air filter.
(4) Connect the power supply plug and/ or turn ON the breaker.
(5) Press WASH reset switch. A short “beep” is heard and the blinks

of PLASMA/WASH lamp will be cancelled. Make sure PLASMA/
WASH lamp is not blinking at the start of operation next time.
(See Figure 4.)

(6) Hold both sides of the front panel and close the front panel.

Figure 4.

(7) Press the 3 positions on the front panel as indicated by the

arrows.(See Figure 5.)

NOTE:
Install PLASMA DEODORIZING/AIR PURIFYING filter units only
when they are completely dry. If the filter unit remains wet,
PLASMA/WASH lamp may blink and the plasma function may be
disabled.(When PLASMA DEODORIZING/AIR PURIFYING filter
units are cleaned.)

12

Figure 5.

INFORMATION FOR MULTI SYSTEM AIR CONDITIONER

Lighted
Blinking
Not lighted

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 which 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.

•When indoor units start 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.

13

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 0.5-

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 POWER 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 POWER 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 POWER
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 (9-2.4.).
Make sure to check at least two consecutive blinking cycles. W2

Turn ON the power supply.
<

Preparation of the remote controller

>
1 While pressing both OPERATION SELECT
button and TOO COOL button on the remote controller at the same time, press
RESET button.
2 First, release RESET button.
And release the other two buttons after all LCD except the set temperature in
operation display section of the remote controller is displayed after 3 seconds.

Deleting the 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

The plasma or outdoor unit might be abnormal because there are some
abnormalities that can't be recalled with this way.
Confirm if plasma unit or outdoor unit is abnormal according to the flow
chart of the plasma unit or 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

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 failure mode recall function for the indoor/outdoor unit

14

2. Flow chart of PLASMA DEODORIZING/PLASMA AIR PURIFYING power failure mode recall function

Operational procedure

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 plasma unit is abnormal:

Yes

(Blinks)

No

(OFF)

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

Does POWER lamp on the indoor
unit blink at the interval of 0.5 seconds?
Blinks: The plasma unit is abnormal.
Beep are emitted at the same timing as the
blinking of POWER lamp. W2

Deleting the abnormal memorized condition

Repair the defective parts.

With the remote controller headed towards the indoor unit, press TOO COOL or TOO
WARM button to adjust the set temperature to 23:. W1

The plasma unit is normal.

Releasing the failure mode recall function

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.

The plasma unit is abnormal.
Check the blinking pattern, and refer to confirm the
abnormal point with the PLASMA DEODORIZING/PLASMA AIR
PURIFYING power failure mode table (9-2.5.).
Make sure to check at least two consecutive blinking cycles. W2

Release the failure mode recall function according to the left
mentioned procedure.

Confirm that the remote controller is in the failure mode recall
function.

The plasma unit might be abnormal.
Confirm if plasma unit is abnormal according to the following procedures.

ON

OFF

Beeps

Repeated cycle Repeated cycle

2.5-second OFF

Blinking at 0.5­second interval

Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5­second interval

Beeps

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.

ActionPLASMA/WASH lamp

Continuously blinking

2-time flash

Follow "Check of

PLASMA DEODORIZING

power" or "Check of

PLASMA AIR PURIFYING

power"

to identify the error.(Refer to 9-6.F or G.)
PLASMA DEODORIZING power and/or PLASMA AIR PURIFYING power

control circuit on the indoor

electronic control P.C. board is out of order.(Refer to 9-6.F or G.)

PLASMA DEODORIZING/PLASMA AIR PURIFYING power goes ON when PLASMA button on the remote contoller is pressed
with any set temperature displayed during failure mode recall function.
PLASMA button is pressed, the power of plasma is changed in sequence:
PLASMA DEODORIZING power goes ON ➔ PLASMA AIR PURIFYING power goes ON ➔ Cancel
Check the operation display section of the remote controller to confirm that PLASMA DEODORIZING power or PLASMA AIR
PURIFYING power is activated.
While PLASMA/WASH lamp stays OFF, it means normal.
Flashing PLASMA/WASH lamp means abnormal, the plasma power is not conducted.

3. PLASMA DEODORIZING/PLASMA AIR PURIFYING power operation check

NOTE: Perform the above mentioned check with the front panel closed (Refer to 9-1.6 Figure5). The SAFETY DEVICE

(PLASMA UNIT) works by opening front panel and the plasma power is cut.

15

4. Indoor unit failure mode table

5-time flash

When the voltage between CN1 3(+)
and 2(GND) on the PLASMA POWER P.C.
board (in the PLASMA DEODORIZING or
PLASMA AIR PURIFYING unit) rises above
the normal voltage value (3V).

4-time flash

PLASMA DEODORIZING/
PLASMA AIR PURIFYING
power

When the voltage between CN1 3(+)
and 2(GND) on the PLASMA POWER P.C.
board (in the PLASMA DEODORIZING or
PLASMA AIR PURIFYING unit) falls
significantly. (0.4V / 0.5ms)

3-time flash

Refer to 9-6.F"Check of PLASMA
DEODORIZING power" or 9-6.G"Check
of PLASMA AIR PURIFYING power".

Abnormal electric
discharge error 1

When the voltage between CN1 3(+)
and 2(GND) on the PLASMA POWER P.C.
board (in the PLASMA DEODORIZING or
PLASMA AIR PURIFYING unit) falls by 0.9V
below the normal voltage value (3V).

2-time flash

Spark discharge

1-time flash

PLASMA DEODORIZING/
PLASMA AIR PURIFYING
power control

When the voltage between CN1 3(+)
and 2(GND) on the PLASMA POWER P.C.
board (in the PLASMA DEODORIZING or
PLASMA AIR PURIFYING unit) falls below

1.6V(spark discharge judgment voltage).

When PLASMA DEODORIZING and/or
PLASMA AIR PURIFYING power cannot be
turned OFF even if the PLASMA operation is
turned OFF with the remote controller.

POWER lamp

Correspondence

Abnormal point

(Failure mode)

Condition

Abnormal electric
discharge error 2

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 the 12-seconds
indoor fan operation.

2-time flash

2.5-second OFF

Refer to the characteristics of the main
indoor coil thermistor, the sub indoor coil
thermistor (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 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 –

POWER lamp

Correspondence

Abnormal point

(Failure mode)

Condition

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

5. PLASMA DEODORIZING/PLASMA AIR PURIFYING power failure mode table

NOTE1 :Blinking patterns of this mode differ from the ones of Troubleshooting check table (9-4.).
NOTE2 :As soon as an abnormality is detected, PLASMA DEODORIZING power and/or PLASMAAIR PURIFYING

power goes OFF, therefore measuring instrument which records the voltage wave is required in order to
perform the above mentioned voltage measurement.

16

9-3. Instruction of troubleshooting

Start

Indoor unit
operates.
Outdoor unit
doesn't
operate.

Outdoor unit
operates only
in Test Run
operation. w

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

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

Unit doesn't
operate
normal
operation in
COOL or

Indoor unit
operates, when
EMERGENCY
OPERATION
switch is pressed.

HEAT mode.

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

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

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

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

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

PLASMA/WASH lamp
2-time flash
cause:
Indoor unit

• Trouble of PLASMA
DEODORIZNG power
control and/or PLASMA
AIR PURIFYING power
control

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

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".

Refer to
"How to check
inverter/
compressor".

POWER 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

.

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

POWER 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".

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

POWER lamp
3-time flash
Cause:
Indoor unit

• Trouble of
indoor fan
motor

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

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".

Left lamp
of AREA lamp
4-time flash
Cause:
Indoor unit

• Trouble of
indoor unit
control

POWER lamp
5-time flash
Cause:
Outdoor unit

• Outdoor
power
system
abnormality

system

Replace the
indoor
electronic
control

Refer to
"How to check
inverter/
compressor".

P.C. board.

Refer to outdoor unit service manual.

POWER lamp
6-time flash
Cause:
Outdoor unit

• Trouble of
thermistor
in outdoor
unit

Refer to
"Check of
outdoor
thermistors".

Refer to 9-6.F"Check of
PLASMA DEODORIZING
power" or 9-6.G"Check of
PLASMA AIR PURIFYING
power".

POWER lamp
7-time flash
Cause:
Outdoor unit

• Trouble of
outdoor

POWER lamp
14-time flash
Cause:
Outdoor unit

• Other

abnormality
control
system

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

Check

"Flow chart of

the detailed

outdoor unit

failure mode

recall function."

board.

17

No.

1

3

5

6

SymptomOperation indicator lamp Condition

Correspondence

POWER 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 form 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".

4

Indoor fan
motor

7

Abnormal

point

Outdoor unit
does not
operate.

Room
tempera­ture
thermistor

POWER 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.

POWER lamp flashes.
3-time flash

2.5-second OFF

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

• Refer to 9-6.A "Check of

indoor fan motor".

Indoor unit
and outdoor
unit do not
operate.

POWER lamp flashes.
5-time flash

2.5-second OFF
POWER 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
abnonmality

An abnormality other than above mentioned is
detected.

• Confirm the abnormality in
detail using the failure mode
recall function for outdoor unit.

Indoor unit
and outdoor
unit do not
operate.

Indoor unit
and outdoor
unit do not
operate.

8

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.

POWER lamp flashes.
7-time flash

2.5-second OFF

POWER lamp flashes.
14-time flash

2.5-second OFF

POWER lamp lights up

9-4. Troubleshooting check table

Lighted
Blinking
Not 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 POWER lamp indicates abnormalities.

18

Lighted

No.

1

SymptomOperation indicator lamp Condition

Correspondence

Abnormal

point

Left lamp of AREA 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.

No.

1

SymptomOperation indicator lamp Condition

Correspondence

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 Condition

Correspondence

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 outdoor unit service
manual.

2.5-second OFF

Both lamps flash

Lighted
Blinking
Not lighted

No.

1

SymptomOperation indicator lamp Condition

Correspondence

Abnormal

point

PLASMA/WASH lamp flashes.
2-time flash

2.5-second OFF

When PLASMA DEODORIZING power and/or
PLASMA AIR PURIFYING power can not be
turned OFF even if the PLASMA operation is
turned OFF with remote controller.

Indoor unit
and outdoor
unit do not
operate.

PLASMA
DEODORIZING/
PLASMA
AIR
PURIFYING
power control

•Refer to 9-6.F"Check of

PLASMA DEODORIZING
power" or 9-6.G"Check of
PLASMA AIR PURIFYING
power".

Blinking
Not lighted

· Flashing of AREAlamp(left-hand side lamp) indicates abnormality.

Lighted
Blinking
Not lighted

Lighted
Blinking
Not lighted

· Flashing of All lamps indicate abnormality.

· Flashing of AREAlamp(both lamps) indicates abnormality.

· POWER lamp is lighted.

· Flashing of PLASMA/WASH lamp indicates abnormality.

19

9-5. Trouble criterion of main parts

Part name FigureCheck method and criterion

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

P.C. board", the chart of thermistor.

Room temperature
thermistor(RT11)

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

Horizontal vane
motor(MV1)

Normal

BRN-other one

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

235 " ~ 255 "

Color of the lead wire

Vertical vane
motor(MV2)

i-see Sensor
motor(MT)

Normal

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

Front panel
driving motor
(MP)

Normal

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

94 " ~ 102 "

i-see Sensor(RR)

Turn the power ON(i-see Sensor is energized) with the aluminum block part
on the i-see Sensor P.C. board (upper part of i-see Sensor) covered with black
vinyl tape, then measure the voltage between connector terminals of i-see
Sensor using tester.
(Part temperature 10 ~ 40°C)

282 " ~ 306 "

Normal range

2(-)

-

4(+)

1(+) - 2(-)

1.874 ~ 3.387V DC

1.010 ~ 1.420V DC

i-see Sensor
connector terminals

NOTE: Pay attention to static electricity.

Indoor fan motor(MF)

Check 9-6. A.

PLASMA DEODORIZING/
PLASMA AIR PURIFYING
power

Check 9-6. F or G.

Color of the lead wire

BRN-other one

Color of the lead wire

BRN-other one

RED

YLW

BRN

ORN

GRN

ROTOR

RED

YLW
BRN

ORN

GRN

ROTOR

RED

YLW
BRN

ORN

GRN

ROTOR

MSZ-FA25VA MSZ-FA35VA

Aluminum block

i-see Sensor

w The aluminum block

part is covered with
black vinyl tape.

Connector

i-see Sensor P.C. board

Black
vinyl tape

20

wIf more than 12 seconds passes after EMERGENCY OPERATION switch

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

Indoor electronic
control P.C. board

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

Yes

No

No

No
(Changed)

Yes
(Unchanged)

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

Turn OFF the power supply.

Remove the foreign matter and
adjust the line flow fan.

Turn ON the power supply, wait 5 seconds or more, and then press
EMERGENCY OPERATION switch.
Measure the supply voltage as follows within 12 seconds
after EMERGENCY OPERATION switch is pressed.
If more than 12 seconds passes by, turn OFF the power supply and
turn ON it again, then measure the voltage. w

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

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

Is there 325V DC between
CN211 1 (+) and 3 (-), and does
the voltage between CN211 5(+)
and 3(-) rise to the range of 3 to 6V
DC within 12 seconds after
EMERGENCY OPERATION switch
is pressed?

Yes

Replace the indoor fan motor.

CN211

Replace the indoor electronic control P.C. board.

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

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

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

Replace the indoor fan motor.

Replace the indoor electronic control P.C. board.

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

9-6. Troubleshooting flow

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

A

Check of indoor fan motor

21

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?

No

Replace the indoor electronic
control P.C. board.

No

Yes

Replace the remote controller.

● Reinstall the unit away from lights.

● Attach a filter on receiving part.

22

The unit does not operate with the remote controller.
Also, POWER 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, vane motor
connector CN151 front panel driving motor connector
CN1U1 and the i-see Sensor motor connector CN110
from the indoor electronic control P.C. board and turn
ON the power supply.

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

No

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

Yes

Measure the resistance of the front panel
driving motor coil.
Refer to 9-5.

Measure the resistance of the i-see Sensor
motor coil.
Refer to 9-5.

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

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

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

Yes

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

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

Is the fuse(F11) blown only?

No

No

Short/open circuit:
Replace the front panel driving motor
and the indoor electronic control P.C.
board.

Short/open circuit:
Replace the i-see Sensor motor and the
indoor electronic control P.C. board.

Short/open circuit:
Replace the indoor fan motor.

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

Indoor electronic
control P.C.Board

CN201

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

CN211

Varistor(NR11)

Yes

Measure the resistance between
1(+) and 3(-) of the indoor fan
motor connector (to CN211 on the
indoor electronic control P.C. board) .
w1,w2

Is the resistance 1M"
or more?

Yes

Replace the fuse (F11).

Replace the indoor electronic control P.C. board.

No

Is the resistance
approx. 4"?

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

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

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

No

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

Yes

Fuse(F11)

23

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

• When POWER 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.

Yes

A

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

No

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

· 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?

B

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 POWER 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"?

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

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

Replace the indoor electronic control P.C. board.

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

W3

Yes

Yes

Yes

Refer to outdoor unit service manual.

No

No

24

Check the power
supply.

Check the wiring.

No

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

No

disconnection of the
indoor/outdoor
connecting wire?

No

W1. Mis-wiring may damage indoor electronic control

P.C. board during the operation.
Be sure to confirm the wiring is correct before the
operation starts.

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

ON. After 3 minutes, LED blinks 6 times. Even when
the inverter P.C.board or the outdoor electronic control
P.C.board is normal, LED blinks 6 times after
3 minutes.
(Except for outdoor unit of multi system type)

No

(Lighted or
not lighted)

No

No

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

No

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

No

Yes

Make them correct.

Yes

Yes

Replace the
indoor/outdoor
connecting wire.

Replace the
indoor/outdoor
connecting wire.

Replace the
indoor electronic
control P.C. board.

Replace the
interlock switch(Fan).

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

Yes

No

Is there resistance 0 "?

Relock the stopper of the
horizontal vane to the indoor unit.
Refer to 9-1.5.

Yes

Are all lamps flashing?

Yes

No(∞)

No

OK

Turn ON the
power supply.

To check the continuity of the interlock switch
(Fan), measure the resistance of connector 1 - 2
connected to CN1R1 on the indoor
electronic control P.C. board.

Turn OFF the
power supply.

Turn OFF the
power supply.

When All lamps flash ON and OFF every 0.5-second.
Indoor unit and outdoor unit do not operate.

Check of installation of the horizontal vane

E

25

When PLASMA/WASH lamp flashes 2-time.

After performing the check, make sure to release the failure mode recall function.

Make sure that the front panel is firmly closed. (Refer to 9-1.6
Figure 5)

1 While pressing both OPERATION SELECT
button and TOO COOL button on the remote controller at the

same time, press RESET button.
2 First, release RESET button.
And release the other two buttons after all LCD except the set

temperature in operation display section of the remote

controller is displayed after 3 seconds.
3 Press OPERATE/STOP (ON/OFF) button (the set temperature

is displayed)

4 And press PLASMA button once with the remote controller

headed towards the indoor unit. w1
PLASMA DEODORIZING operation is selected.
wThe plasma power operation check mode is set.(Refer to 9-2.5.)

PLASMA DEODORIZING power supply is normal.
Working of SAFETY DEVICE (PLASMA UNIT)
due to uncomplete close of the front panel could
cause 2-time flash.

Abnormal discharge may occur due to much dirt on the
PLASMA unit, clean the unit.
After cleaning, make sure to attach the unit since it is
completely dry.
If PLASMA DEODORIZING power operation check is
performed with the plasma unit wet, protection gets active
and PLASMA/WASH lamp blinks continuously as well.

w2 Turn PLASMA DEODORIZING power OFF and ON again.

(For turning OFF PLASMA DEODORIZING power, refer to 9-2.3.)
(If it goes normal without turning OFF and ON, PLASMA/WASH lamp
doesn't go OFF.)

Yes

No

No

Yes

Yes

No

9.5V DC is generated.

Yes

No

Replace the indoor electronic control P.C. board,
after check of the wiring of CN1T1 on the indoor electronic
control P.C. board.

High voltage (approx. -3.9kV) is generated during PLASMA
DEODORIZING power operation.
Pay careful attention and never touch PLASMA unit and the
high-voltage lead part (red wire).

Yes

No

OFF

PLASMA
DEODORIZING
operation

Continuously blinking.

OFF

Continuously blinking.

Does PLASMA/WASH lamp
flash 2-time with unit stopping?

Turn ON the power supply.

Replace the indoor electronic control P.C. board.

Remove PLASMA DEODORIZING filter,
firmly close the front panel, and then perform
PLASMA DEODORIZING power operation
check (w2).
Does PLASMA/WASH lamp stay OFF, or
continuously blink?

Does PLASMA/WASH lamp stay OFF, or
continuously blink?

Turn OFF the power supply, and check the
SAFETY DEVICE(PLASMA UNIT).
Is it firmly fixed?

Work and Not-work the SAFETY DEVICE
(PLASMA UNIT) using something like a screw
driver, and measure the resistance between
CN1T2 1 and 3 on the indoor electronic
control P.C. board. Does the SAFETY
DEVICE function?

Keep the SAFETY DEVICE(PLASMA UNIT)
Not-work (close) using something like a screw
driver. Turn ON the power supply. Is the voltage
between CN1 1(+) and 2(GND)
on the PLASMA POWER P.C. board
(PLASMA DEODORIZING) 0V with the unit
stopping? (Refer to 9-7.)

Set the plasma power failure mode recall function.
(Refer to 9-2.2)

Replace the PLASMA POWER P.C. board
(PLASMA DEODORIZING).

Replace the indoor electronic control P.C. board.

When PLASMA DEODORIZING power turns
ON by pressing PLASMA button once, is there

12.5V DC between CN1 1(+) and 2(GND)?

Replace the SAFETY DEVICE(PLASMA UNIT).

Firmly fix the SAFETY DEVICE(PLASMA UNIT).

w1 Regardless of normal or abnormal, a short
beep is emitted once as the signal is received.

When POWER lamp flashes 1 to 5 times while PLASMA DEODORIZING / PLASMA AIR PURIFYING power failure
mode is recalled.

F

Check of PLASMA DEODORIZING power

26

When PLASMA/WASH lamp flashes 2-time.

After performing the check, make sure to release the failure mode recall function.

Make sure that the front panel is firmly closed. (Refer to 9-1.6
Figure 5)

1 While pressing both OPERATION SELECT
button and TOO COOL button on the remote controller at the

same time, press RESET button.
2 First, release RESET button.
And release the other two buttons after all LCD except the set

temperature in operation display section of the remote

controller is displayed after 3 seconds.
3 Press OPERATE/STOP (ON/OFF) button (the set temperature

is displayed)

4 And press PLASMA button twice with the remote controller

headed towards the indoor unit. w1
PLASMA AIR PURIFYING operation is selected.
wThe plasma power operation check mode is set.(Refer to 9-2.5.)

PLASMA AIR PURIFYING power supply is normal.
Working of SAFETY DEVICE (PLASMA UNIT)
due to uncomplete close of the front panel could
cause 2-time flash.

Abnormal discharge may occur due to much dirt on
the PLASMA unit, clean the unit.
After cleaning, make sure to attach the unit since it is
completely dry.
If PLASMA AIR PURIFYING power operation check is
performed with the plasma unit wet, protection gets active
and PLASMA/WASH lamp blinks continuously as well.

w2 Turn PLASMA AIR PURIFYING power OFF and ON again.

(For turning OFF PLASMA AIR PURIFYING power, refer to 9-2.3.)
(If it goes normal without turning OFF and ON, PLASMA/WASH lamp
doesn't go OFF.)

Yes

No

No

Yes

Yes

No

9.5V DC is generated.

Yes

No

Replace the indoor electronic control P.C. board,
after check of the wiring of CN1T1 on the indoor electronic
control P.C. board.

High voltage (approx. -3.9kV) is generated during PLASMA
AIR PURIFYING power operation.
Pay careful attention and never touch PLASMA unit and the
high-voltage lead part (red wire).

Yes

No

OFF

Continuously blinking.

OFF

Continuously blinking.

Does PLASMA/WASH lamp
flash 2-time with unit stopping?

Turn ON the power supply.

Replace the indoor electronic control P.C. board.

Remove PLASMA AIR PURIFYING filter,
firmly close the front panel, and then perform
PLASMA AIR PURIFYING power operation
check (w2).
Does PLASMA/WASH lamp stay OFF, or
continuously blink?

Does PLASMA/WASH lamp stay OFF, or
continuously blink?

Turn OFF the power supply, and check the
SAFETY DEVICE(PLASMA UNIT).
Is it firmly fixed?

Work and Not-work the SAFETY DEVICE
(PLASMA UNIT) using something like a screw
driver, and measure the resistance between
CN1T2 1 and 3 on the indoor electronic
control P.C. board. Does the SAFETY
DEVICE function?

Keep the SAFETY DEVICE(PLASMA UNIT)
Not-work (close) using something like a screw
driver. Turn ON the power supply. Is the voltage
between CN1 1(+) and 2(GND)
on the PLASMA POWER P.C. board
(PLASMA AIR PURIFYING) 0V with the unit
stopping? (Refer to 9-7.)

Set the plasma power failure mode recall function.
(Refer to 9-2.2)

Replace the PLASMA POWER P.C. board
(PLASMA AIR PURIFYING).

Replace the indoor electronic control P.C. board.

When PLASMA AIR PURIFYING power turns
ON by pressing PLASMA button twice, is there

12.5V DC between CN11(+) and 2(GND)?

Replace the SAFETY DEVICE(PLASMA UNIT).

Firmly fix the SAFETY DEVICE(PLASMA UNIT).

PLASMA
AIR PURIFYING
operation

w1 Regardless of normal or abnormal, a short
beep is emitted once as the signal is received.

When POWER lamp flashes 1 to 5 times while PLASMA DEODORIZING / PLASMA AIR PURIFYING power failure
mode is recalled.

G

Check of PLASMA AIR PURIFYING power

27

Is the connectors for the front panel
driving motor unit connected?
(Motor side or P.C. board side)

Front panel is normal.

Replace the front panel
driving motor unit.

Does the front panel automatically
open? (Does it start to move?)

Yes

Is the front panel held 10mm or
more upper than the level line of
the nozzle top?

Yes

No

Turn the remote controller ON.

Connect the connector and
check from the start again.

Is the resistance between terminals
of the front panel driving motor unit
normal?
(Refer to 9-5.)

Replace the indoor electric
control P.C. board.

Replace the front panel
driving motor unit.

Yes

No

No

Yes

No

Indoor unit and outdoor unit do not operate.

Check of auto front panel

H

10 mm or
more

Z-Z side view

28

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.

I

29

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

Temperature (:)

Resistance (k")

9-7. Test point diagram and voltage

MSZ-FA25VA MSZ-FA35VA

Indoor electronic control P.C. board

Power supply input

SW P.C. Board

WASH reset
switch(SW2)

Emergency
operation
switch(SW1)

230V AC

{

5V DC

12V DC

Cement resistance

(R111)

Indoor fan motor
(CN211)

1311V DC

3(-) Fiducial terminal of

cathode side on measur­ing high-voltage DC

415

V DC

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

Interlock switch(Fan)
(CN1R1)

Room temperature
thermistor (CN111)

Varistor
(NR11)

CN2011
(Used for check of con­ducting of thermal fuse)

Indoor coil thermistor
RT12(MAIN)
RT13(SUB)
(CN112)

Plasma deodorizing/air
purifying filter units
(CN1T1)

12

34

Power monitor
receiver P.C.
board.

Plasma power P.C. board

High-voltage lead wire
(Red)

i-see Sensor
(CN110)

Release of Auto restart
function
Solder the Jumper wire
to JR07.

(Refer to 8-3.)

1DC 2.5V during PLASMA

CN1

AIR PURIFYING/PLASMA
DEODORIZING operation

2GND
3DC 12.5V during PLASMA

AIR PURIFYING/PLASMA
DEODORIZING operation

Standard lead wire
(Green)

Fuse
(F11)

Front panel
driving motor
(CN1U1)

Safety device(Plasma unit)
(CN1T2)

Horizontal and
Vertical vane
motor(CN151)

Timer short mode
point JPG, JPS

}

(Refer to 8-1.)

30

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-FA25VA MSZ-FA35VA

OPERATING PROCEDURE

1. Removing the panel

(1) Press and unlock the knobs on both sides of the front

panel and lift the front panel until it is level, and then pull

the hinges forward to remove the front panel.
(2) Remove the horizontal vane.
(3) Remove the screw caps of the panel.

Remove the screws. (See Photo 1.)
(4) Remove the screw of the front panel driving motor.

(See Photo 2.)
(5) Hold the lower part of both ends on the panel and pull it

slightly toward you, and then remove the panel by pushing

it upward.

PHOTOS

Photo 1

Front panel

Screws of the panel

Horizontal vane

Photo 2

31

Screw of the front panel
driving motor

OPERATING PROCEDURE PHOTOS

2. Removing the electronic control P.C. board, the
power monitor receiver P.C. board, i-see Sensor,
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 the V.A. clamp, and then the

indoor/outdoor connecting wire.(See Photo 3.)

(3) Remove the switch holder from the electrical cover.

(See Photo 4.)

(4) Remove the screw of the electrical cover, and then the

electrical cover. (See Photo 4.)

(5) Remove the earth wire connected to the indoor electronic

control P.C. board from the electrical box. (See Photo 5.)

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

the catch. (See Photo 5.)

(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) Remove the screws of the i-see Sensor cover and the i-see

Sensor motor, and then the i-see Sensor motor.
(9) Open the i-see Sensor holder and pull out the i-see Sensor.
(10)

Open the switch holder and pull out SW P.C. board.
(11)

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.)

(12)

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

box.

(13)

Remove the earth wire connected to the heat exchanger

from the electrical box. (See Photo 5.)

(14)

Unhook the catches of the electrical box, and pull out the

electrical box.

(15)

Remove the screws of the terminal block cover, and then
the terminal block cover and the terminal block holder.
(See Photo 3.)

(16)

Remove the terminal block by sliding it.

3. Removing the electrical box

(1) Remove the horizontal vane, the panel (Refer to 1.) and the

corner box.

(2) Remove the screw of the V.A. clamp, and then the indoor/

outdoor connecting wire.(See Photo 3.)

(3) Remove the switch holder and the electrical cover.

(See Photo 4.)

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

from the electrical box.(See Photo 5.)

(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>, the connector of

the safety device (plasma unit) <CN1T2>, the connector of

the plasma power P.C. board <CN1T1>, the connector of

the front panel driving motor <CN1U1>.

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

electrical box. (See Photo3.)

Photo 3

Screws of
the terminal
block cover

Drain hose

Photo 4

Photo 5

Power monitor
receiver P.C.
board holder

Earth wires

i-see Sensor

Screw of the V.A. clamp

Switch holder

Screw of the
electrical cover.

Fan motor
connector (CN211)

Connector of the
interlock switch(Fan)
(CN1R1)

Indoor coil thermistor
connector (CN112)

Connector of the
plasma power
P.C.board(CN1T1)

Connector of the
safety device(Plasma
unit) (CN1T2)

Vane motor
connector (CN151)

Connector of the
front panel driving
motor (CN1U1)

i-see Sensor
cover

32

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 6.)

(3) Disconnect the connector from the horizontal vane motor

unit.

5. Removing the vertical vane motor unit

(1) Remove the horizontal vane, the panel (Refer to 1.) and

the corner box.

(2) Pull out the drain hose from the nozzle assembly, and

remove the nozzle assembly. (See Photo 5.)

(3) Remove the crank of the vertical vane motor unit from the

arm of the vertical vane.(See Photo 7.)

(4) Remove the screws of the vertical vane motor unit, and pull

the vertical vane motor unit. (See Photo 7.)

Photo 6

Screw of the horizontal
vane motor unit

Photo 7

Arm

Crank of the vertical
vane motor unit

Screws of the vertical
vane motor unit

6. 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 10.)

(See Photo 8.)

(See Photo 9.)

Photo 9

Screw of
the line
flow fan

Photo 8

Screws of
the motor
bed

Photo 10

Screws of the
left side of the
heat exchanger

Motor band

33

OPERATING PROCEDURE PHOTOS

7. Removing the plasma power P.C. board

(1) Remove the horizontal vane, the panel (Refer to 1.) and

the corner box.

(2) Remove the switch holder and the electrical cover.

(Refer to 3.)

(3) Disconnect the connector of the front panel driving motor

<CN1U1> from the electronic control P.C. board.
(4) Remove the front panel driving motor.
(5) Remove the screw of the plasma element holder, and remove

the plasma element holder from the heat exchanger.

(See Photo 11.)
(6) Unhook all the catches of plasma unit cover and remove

the plasma unit cover. (See Photo 12.)
(7) Remove the terminals with locking mechanism connected

to the plasma power P.C. board and the safety device

(Plasma unit). (See Photo 13.)
(8) Remove the plasma electrical box from the plasma element

holder.
(9) Remove the screw fixing the plasma electrical box, and

open the plasma electrical box then pull out the plasma

power P.C. board from the plasma electrical box.

(See Photo 13.)

Photo 11

Photo 12

Screw of the plasma
element holder

Plasma unit cover

Front panel
driving motor

Photo 13

Terminal

Safety device
(Plasma unit)

Terminal

Screw of
the plasma
electrical box

Plasma
power
P.C. board

Terminal

Terminal

34

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-FA25VA-

E1

9

10

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

KM05A

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

Including No.3,4
2PCS/SET

E2

MSZ-FA35VA-

E1 E2

1

1
2
1
1
1
1

1

1
1
2
1
1
1

1
1

1
1
2
1
1
1

1
1

1

1
2
1
1
1
1

1

E02 897 234
E02 A32 234
E02 913 000
E02 913 067
E02 913 010
E02 914 100
E02 913 100
E02 913 975
E02 A32 975
E02 913 970

1
1

1
1

1
1

1
1

E02 913 426
E02 527 083

MSZ-FA25VA
MSZ-FA35VA
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

10

7

6

11-2. ACCESSORY AND REMOTE CONTROLLER

35

PARTS LIST (non-RoHS compliant)

MSZ-FA25VA
MSZ-FA35VA

11-3. INDOOR UNIT ELECTRICAL PARTS

AND FUNCTIONAL PARTS

30

1

29

27

26

25

24

20

32

7

28

22

21

23

18

17

16

15

14

2

3
4

5

6

8

31

18

11

12

11-4. INDOOR UNIT HEAT EXCHANGER

34

35

13

33

36

10

9

18

19

BEARING MOUNT
SLEEVE BEARING
DRAIN HOSE
NOZZLE ASSEMBL Y
VANE MOTOR UNIT (HORIZONTAL)
INTERLOCK SWITCH(FAN)
VANE MOTOR UNIT (VERTICAL)
HORIZONTAL VANE
FUSE
VARISTOR
POWER MONITOR RECEIVER P.C. BOARD HOLDER
i-see Sensor
i-see Sensor MOTOR
VA CLAMP
TERMINAL BLOCK COVER
TERMINAL BLOCK HOLDER
TERMINAL BLOCK
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
INDOOR COIL THERMISTOR
SWITCH HOLDER
INDOOR FAN MOTOR W2
MOTOR BAND
FRONT PANEL DRIVING MOTOR
LINE FLOW FAN
PLASMA ELEMENT HOLDER
PLASMA UNIT COVER
PLASMA ELECTRICAL BOX
PLASMA POWER P.C. BOARD
SAFETY DEVICE (PLASMA UNIT)
PLASMA AIR PURIFYING FILTER UNIT
PLASMA DEODORIZING FILTER UNIT

UP & DOWN

RIGHT & LEFT

T3.15AL250V

AUTO RESTART
AUTO RESTART

RC0J40- or RC0J30-

MV1

MV2

F11

NR11

RR
MT

TB

RT11
RT12, RT13
RT12, RT13

MF

MP

PLASMA_A
PLASMA_D

No. Part No.

Part name

Remarks

Symbol

in Wiring

Diagram

Q'ty/unit

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17

18
19
20
21

22
23
24
25
26
27
28
29
30
31
32

MSZ-FA25VA-

E1 E2

MSZ-FA35VA-

E1 E2

33
34

35

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

{9.52
{6.35

E02 751 509
E02 001 504
E02 897 702
E02 913 235
E02 897 303
E02 897 316
E02 913 303
E02 913 040
E02 A49 382
E02 661 385
E02 913 095
E02 913 391
E02 914 303
E02 897 784
E02 897 780
E02 897 779
E02 913 375
E02 913 452
E02 914 452
E02 897 308
E02 913 307
E02 914 307
E02 913 782
E02 915 300
E02 897 333
E02 898 303
E02 897 302
E02 913 775
E02 913 776
E02 913 777
E02 897 440
E02 898 316
E02 913 774
E02 914 774

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
2
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
2
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
2
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
2
1
1
1

E02 913 620
E02 914 620
E02 815 666
E02 151 667

1

1
1

1

1
1

1
1
1

1
1
1

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

PARTS LIST (non-RoHS compliant)

11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

11-4. INDOOR UNIT HEAT EXCHANGER

37

38

RoHS PARTS LIST (RoHS compliant)12

No.

Part No.

Part name

Remarks

Symbol

in Wiring

Diagram

Q'ty/unit

1
2
3
4
5
6
7
8

G
G
G
G
G
G
G
G

MSZ-FA25VA-

E2

910G

G

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

KM05A

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

Including No.3,4
2PCS/SET

E3

MSZ-FA35VA-

E2 E3

1
1
2
1
1
1
1
1

1
1
2
1
1
1
1
1

1
1
2
1
1
1
1
1

1
1
2
1
1
1
1
1

E12 A32 234
E12 913 000
E12 913 067
E12 913 010
E12 914 100
E12 913 100
E12 A32 975
E12 913 970

1
1

1
1

1
1

1
1

E12 913 426
E12 527 083

RoHS

MSZ-FA25VA
MSZ-FA35VA
12-1. INDOOR UNIT STRUCTURAL PARTS

12-2. ACCESSORY AND REMOTE

CONTROLLER

1

2

3

4

5

12-1. INDOOR UNIT STRUCTURAL PARTS

8

9

10

7

6

12-2. ACCESSORY AND REMOTE CONTROLLER

39

RoHS PARTS LIST (RoHS compliant)

MSZ-FA25VA
MSZ-FA35VA

12-3. INDOOR UNIT ELECTRICAL PARTS

AND FUNCTIONAL PARTS

30

1

29

27

26

25

24

20

32

7

28

22

21

23

18

17

16
15

14

2

3
4

5

6

8

31

18

11

12

12-4. INDOOR UNIT HEAT EXCHANGER

34

35

13

33

40

10

9

18

19

RoHS PARTS LIST (RoHS compliant)

12-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

Symbol

No. Part No.

RoHS

G

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17

18

19
20
21

22
23
24
25
26
27
28
29
30
31
32

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

E12 751 509

G

E12 001 504

G

E12 897 702

G

E12 913 235

G

E12 897 303

G

E12 897 316

G

E12 913 303

G

E12 913 040

G

E12 A49 382

G

E12 661 385

G

E12 913 095

G

E12 913 391

G

E12 914 303

G

E12 897 784

G

E12 897 780

G

E12 897 779

G

E12 913 375

G

E12 913 452

G

E12 914 452

G

E12 B42 452

G

E12 B43 452

G

E12 897 308

G

E12 913 307

G

E12 914 307

G

E12 913 782

G

E12 915 300

G

E12 897 333

G

E12 898 303

G

E12 897 302

G

E12 913 775

G

E12 913 776

G

E12 913 777

G

E12 897 440

G

E12 898 316

G

E12 913 774

G

E12 914 774

BEARING MOUNT
SLEEVE BEARING
DRAIN HOSE
NOZZLE ASSEMBL Y
VANE MOTOR UNIT (HORIZONTAL)
INTERLOCK SWITCH(FAN)
VANE MOTOR UNIT (VERTICAL)
HORIZONTAL VANE
FUSE
VARISTOR
POWER MONITOR RECEIVER P.C. BOARD HOLDER
i-see Sensor
i-see Sensor MOTOR
VA CLAMP
TERMINAL BLOCK COVER
TERMINAL BLOCK HOLDER
TERMINAL BLOCK
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ELECTRONIC CONTROL P.C. BOARD W1
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
INDOOR COIL THERMISTOR
SWITCH HOLDER
INDOOR FAN MOTOR W2
MOTOR BAND
FRONT PANEL DRIVING MOTOR
LINE FLOW FAN
PLASMA ELEMENT HOLDER
PLASMA UNIT COVER
PLASMA ELECTRICAL BOX
PLASMA POWER P.C. BOARD
SAFETY DEVICE (PLASMA UNIT)
PLASMA AIR PURIFYING FILTER UNIT
PLASMA DEODORIZING FILTER UNIT

Part name

in Wiring

Diagram

MV1

MV2

F11

NR11

RR
MT

TB

RT11
RT12, RT13
RT12, RT13

MF

MP

PLASMA_A
PLASMA_D

MSZ-FA25VA-

E2 E3

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
2
1
1
1

Q'ty/unit

MSZ-FA35VA-

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
2
1
1
1

E2 E3

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
2
1
1
1

Remarks

1
1
1
1

UP & DOWN

1
1

RIGHT & LEFT

1
1

T3.15AL250V

1
1
1
1
1
1
1
1
1

AUTO RESTART
AUTO RESTART
AUTO RESTART
AUTO RESTART

1
1

1
1

RC0J40- or RC0J30-

1
1
1
1
1
1
1
2
1
1
1

12-4. INDOOR UNIT HEAT EXCHANGER

33
34

35

G

E12 913 620

G

E12 914 620

G

E12 815 666

G

E12 151 667

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

41

1

1
1

1

1
1
1

1

1

1

{9.52

1

{6.35

1

13 OPTIONAL PARTS

(1)

(2)

Deodorizing ceramic filter

MAC-305FT-E

Model Part No.

MSZ-FA25VA
MSZ-FA35VA

MAC-093SS-E

Model Part No.

MSZ-FA25VA
MSZ-FA35VA

Heat exchanger

13-1. DEODORIZING CERAMIC FILTER

Replacement of the deodorizing ceramic filter(about once every 6 years)

Deodorizing ceramic filter is installed inside PLASMA DEODORIZING filter unit. The filter is fragile. Handle it with care.
NOTE: PLASMA DEODORIZING filter unit may not operate properly if the deodorizing ceramic filter is not installed.

Be sure to install the deodorizing ceramic filter.

(1) Release the two knobs to open the filter unit.
(2) Pull the side knobs to outward and then

forward to remove, as illustrated below.

(3) Pull out the deodorizing ceramic filter from the side of

the filter unit.

(4) Install the deodorizing ceramic filter by following the

removal procedure in reverse.

13-2. QUICK CLEAN KIT

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

42

43

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

CC

Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in May 2006. No. OB371 REVISED EDITION-B 6
Distributed in Jan. 2006. No. OB371 REVISED EDITION-A 6
Distributed in Jan. 2005. No. OB371 6
Made in Japan

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