Mitsubishi Electronics Msz Fa35Va Users Manual

MSZ-FA35VA to the manual 163b9e8f-ff35-4186-97e2-72bb48d65f3e

2015-02-09

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OB371_--1qxp 05.1.17 12:50 Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

No. OB371

SERVICE MANUAL
Wireless type
Models

MSZ-FA25VA MSZ-FA35VA -

(WH)

CONTENTS

Indication of model name
MSZ-FA25VA - E1
MSZ-FA35VA - E1

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. OPTIONAL PARTS···········································38

NOTE:
This service manual describes technical data of the indoor units.
•As for outdoor units MUZ-FA25VA- E1 , MUZ-FA35VA- E1 , MUZ-FA25VAH- E1 and
MUZ-FA35VAH- E1 , refer to service manual OB372.
•As for outdoor units MXZ-3A54VA- E1 , MXZ-4A71VA- E1 and MXZ-4A80VA- E1 ,
refer to service manual OB377.

OB371_--1qxp 05.1.17 12:50 Page 2

TECHNICAL CHANGES

MSZ-A09YV - E1
MSZ-A12YV - E1

➔ MSZ-FA25VA - E1
➔ MSZ-FA35VA - E1

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.

Generalized stepping motor
NOTE: Do not remove the vane motor from the motor unit.
Do not disassemble the horizontal vane motor unit.
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.

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 AREA setting 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

OB371_--1qxp 05.1.17 12:50 Page 3

PART NAMES AND FUNCTIONS

INDOOR UNIT
MSZ-FA25VA - E1
MSZ-FA35VA - E1
Air inlet

PLASMA AIR PURIFYING filter

Front panel
Panel

PLASMA DEODORIZING filter

Heat exchanger
Fan guard

Anti-mold air filter
Air outlet
Vertical vane
Horizontal vane

Remote controller

Line flow fan
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.

Display section

Operation section
(When the front panel is opened)

POWER lamp
PLASMA/WASH lamp

Auto front panel
AREA lamp

Emergency operation
switch

WASH reset switch

Remote control
receiving section

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 Sensor

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").

OB371_--1qxp 05.1.17 12:50 Page 4

MSZ-FA25VA - E1
MSZ-FA35VA - E1
MSZ-FA25VA MSZ-FA35VA -

ACCESSORIES
1

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)

REMOTE CONTROLLER
Signal transmitting section

Operation display section

OPERATE/STOP
(ON/OFF) button

Temperature buttons

Indication of
remote controller
model is on back

Open the front lid.

(This diagram shows an overall view.)

WIDE VANE button
(Vertical vane button)
FAN SPEED CONTROL button
OPERATION SELECT button

OFF-TIMER button

ECONO COOL button

ON-TIMER button
TIME SET buttons
FORWARD button
BACKWARD button

PLASMA button
AREA button

CLOCK SET button
i-see button

VANE CONTROL button
(Horizontal vane button)

RESET button

E1
E1

OB371_--1qxp 05.1.17 12:50 Page 5

SPECIFICATION
Indoor model

MSZ-FA25VA -

Function

Cooling

MSZ-FA35VA -

Cooling

Heating
Single phase
230V,50Hz

Power supply
Air flow(Super High)
K /h
Air flow(HighW/Med.W/LowW) K /h
Power outlet
A
Running current ✽1
A
Power input ✽1
W
Auxiliary heater
A(kW)
Power factor ✽1
%
Fan motor current ✽1
A
Fan motor Model
Dimensions WOHOD
mm
Weight
kg
Air direction
Sound level(Super High)
dB(A)
Sound level(HighW/Med.W/LowW) dB(A)
Fan speed(Super High)
rpm
Fan speed(HighW/Med.W/LowW) rpm
Fan speed regulator
Thermistor RT11(at25:)
k"
Thermistor RT12(at25:)
k"
Thermistor RT13(at25:)
k"
Remote controller model
Special
remarks

Electrical
data

Capacity

594
474W/354W/252W

Heating
Single phase
230V,50Hz

594
474W/354W/258W

612
498W/384W/264W

10
0.25
33
—
57
0.25
RC0J40-EB
780O298O198
10
4
42
36W/29W/21W
1,220
1,010W/800W/610W

612
498W/384W/276W

10
0.25
33
—
57
0.25
RC0J40-EB
780O298O198
10
4
42
36W/29W/22W
1,220
1,010W/800W/630W

1,250
1,050W/850W/640W

4
10
10
10
KM05A

1,250
1,050W/850W/660W

4
10
10
10
KM05A

When outdoor unit is MXZ type.
Indoor model

MSZ-FA25VA -

Function

Special
remarks

Air flow(Super High)
K /h
Capacity
Air flow(HighW/Med.W/LowW) K /h
Sound level(Super High)
dB(A)
Sound level(HighW/Med.W/LowW) dB(A)
Fan speed(Super High)
rpm
Fan speed(HighW/Med.W/LowW) rpm

Cooling
546
450W/348W/252W

MSZ-FA35VA -

Cooling

Heating
540
420W/372W/264W

Heating
642
516W/390W/258W
522W/402W/276W
42
36W/29W/22W

42
36W/29W/21W
1,130
960W/790W/610W

1,120
910W/830W/640W

NOTE : Test conditions are based on ISO 5151
Cooling : Indoor Dry-bulb temperature 27:Wet-bulb
Outdoor Dry-bulb temperature 35:Wet-bulb
Heating : Indoor Dry-bulb temperature 20:Wet-bulb
Outdoor Dry-bulb temperature 7: Wet-bulb
Refrigerant piping length (one way): 5m
w Reference value
✽1 Measured under rated operating frequency.

temperature
temperature
temperature
temperature

1,300
1,080W/860W/630W 1,090W/880W/660W

19:
24:
15:
6:

Specifications and rating conditions of main electric parts

INDOOR UNIT
Item

Model

MSZ-FA25VA -

MSZ-FA35VA -

Fuse

(F11)

T3.15AL250V

Front panel driving motor

(MP)

NSEJ001DA1 12V DC 100" (at 25˚C)

i-see Sensor motor

(MT)

Horizontal vane motor
Vertical vane motor
Varistor

MP20Z 12V DC 300" (at 25˚C)

(MV1)

MSBPC20M16 12V DC 250" (at 25˚C)

(MV2)

MSBPC20M11 12V DC 300" (at 25˚C)

(NR11)

ERZV14D471

i-see Sensor

(RR)

A2TPMI334F0V50HSOBA060P5L1J4S 5V DC

Terminal block

(TB)

OB371_--1qxp 05.1.17 12:50 Page 6

NOISE CRITERIA CURVES

MSZ-FA25VA - E1

MSZ-FA35VA - E1

FAN SPEED FUNCTION
Super High

SPL(dB(A))

COOLING

HEATING

LINE

FAN SPEED FUNCTION
Super High

70
NC-70

60
NC-60

50
NC-50

40
NC-40

30
NC-30

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

125

NC-20

250

500

1000

2000

4000

HEATING

LINE

Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
90
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
90

SPL(dB(A))

COOLING

70
NC-70

60
NC-60

50
NC-50

40
NC-40

30
NC-30

8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

BAND CENTER FREQUENCIES, Hz

125

NC-20

250

500

1000

2000

4000

BAND CENTER FREQUENCIES, Hz

INDOORUNIT
WALL
1m
0.8m
MICROPHONE

8000

OB371_--1qxp 05.1.17 12:50 Page 7

OUTLINES AND DIMENSIONS
Unit : mm

11o26 Oblong hole

155

335

Indoor unit

320

Wall hole [65
5

100

298

7 or more

198

{

Drain hose [16
(Connected part O.D)
90

Insulation [28

106

Air out

159

102

Installation plate
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

75 or more

55 or morew

10 or more

75 or more

wIn case of left, left back, or
left under piping (using spacer),
113 or more

624.5

Air in

41.5

780

53.5

215

Installation plate

11o20 Oblong hole
225
225

214
234
273.5
287.5

42.5

INDOOR UNIT

MSZ-FA25VA - E1
MSZ-FA35VA - E1

OB371_--1qxp 05.1.17 12:50 Page 8

WIRING DIAGRAM

MSZ-FA25VA - E1
MSZ-FA35VA - E1
INDOOR UNIT

MODELS WIRING DIAGRAM
230V~

S1
S2

TO OUTDOOR
UNIT
CONNECTING

12-24V

BLK

TAB3

INDOOR ELECTRONIC
CONTROL P.C. BOARD

F11
DB111

BLU
RED

2
1

CN
111

NR11

1
2
3
4
5
6

LD104
GRN

CN
1R1

LD
101(A)

2
INTERLOCK
SWITCH(FAN)

MV1 MV2

SYMBOL
DB111
F11
MF
MP
MT
MV1

CN
110

LD
105(T)

CN
1T1

SW P.C.
BOARD

POWER MONITOR
RECEIVER P.C. BOARD

CN
1T2

PLASMA_A

PLASMA_D

RT12

T111

CN201

CN
151

RT13

CN 3
112 2

CN
1U1

RT11
RED
BLK
WHT
YLW
BLU

CN211

SAFETY DEVICE
(PLASMA UNIT)

NAME
NAME
NAME
SYMBOL
SYMBOL
VANE MOTOR (VERTICAL)
MV2
DIODE STACK
RT12 INDOOR COIL THERMISTOR (MAIN)
NR11 VARISTOR
FUSE (T3.15AL250V)
RT13 INDOOR COIL THERMISTOR (SUB)
PLASMA_A PLASMA AIR PURIFYING FILTER UNIT
TRANSFORMER
INDOOR FAN MOTOR
T111
FRONT PANEL DRIVING MOTOR PLASMA_D PLASMA DEODORIZING FILTER UNIT
TERMINAL BLOCK
TB
i-see Sensor
RR
i-see Sensor MOTOR
VANE MOTOR (HORIZONTAL) RT11 ROOM TEMPERATURE THERMISTOR

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

REFRIGERANT SYSTEM DIAGRAM

MSZ-FA25VA - E1

MSZ-FA35VA - E1

INDOOR UNIT

Indoor
heat
exchanger

INDOOR UNIT

Refrigerant pipe [9.52
(with heat insulator)
Indoor coil
thermistor
RT12(main)

Indoor
heat
exchanger

Flared connection

Indoor coil
thermistor
RT13(sub)

Refrigerant pipe [9.52
(with heat insulator)

Flared connection

Indoor coil
thermistor
RT13(sub)

Room temperature
thermistor
RT11

Flared connection

Refrigerant flow in cooling
Refrigerant flow in heating

Indoor coil
thermistor
RT12(main)

Unit : mm

Flared connection

Refrigerant pipe [6.35
(with heat insulator)

OB371_--1qxp 05.1.17 12:50 Page 9

SERVICE FUNCTIONS

MSZ-FA25VA - E1
MSZ-FA35VA - E1
8-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-7.)
Set time : 1-minute ➔ 1-second
Set time : 3-minute ➔ 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is
shortened by short circuit of JPG and JPS.)

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.
How to modify the remote controller P.C. board
Remove batteries before modification.
The board has a print as shown below :
Remote controller model : KM05A

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
J2
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
1 unit operation

2 units operation

3 units operation

4 units operation

No. 1 unit

No modification

Same as at left

No. 2 unit

–

Solder J1

Same as at left

No. 3 unit

–

Solder J2

Same as at left

No. 4 unit

–

Solder both J1 and J2

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 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.)

OB371_--1qxp 05.1.17 12:50 Page 10

CN151 CN1T2 CN1T1 CN112

IC156

CN212

CN130

CN1R1 CN211

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.)

JR07

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.

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.
Side swich

Area
Position of
the slide
switch
Display on
the remote
controller

Left

Center

Right

Where is the indoor unit installed in your room?
Installed at left , if the
distance is not more
than 50 cm.
(Left)

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

(Right)

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

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.

OB371_--1qxp 05.1.17 12:50 Page 11

TROUBLESHOOTING

MSZ-FA25VA - E1
MSZ-FA35VA - E1
9-1. Cautions on troubleshooting
1. Before troubleshooting, check the following:
1) Check the power supply voltage.
2) Check the indoor/outdoor connecting wire for mis-wiring.
2. Take care the following during servicing.
1) Before servicing the air conditioner, be sure to turn off the unit first with the remote controller, and then after
confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.
2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the
electronic control P.C. board.
3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

Lead wiring
Housing point
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.

2 Press RESET button with tip end of ball point pen
or the like, and then use the remote controller.

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.

RESET button

NOTE : 1. If RESET button is not pressed, the remote controller may not operate correctly.
2. This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced.
This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by
the battery replacement.
5. How to install the horizontal vane
If horizontal vane is not installed correctly, All of the operation indicator lamps will blink.
In this case, install the horizontal vane correctly by following the procedures 1 to 2.
NOTE: Before installation of the horizontal vane, turn OFF the power supply.

Stopper

In procedure 2 lock the
stoppers until they click
into place.

Left

Lock.

Insert this end first.

OB371_--1qxp 05.1.17 12:50 Page 12

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.

(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 1.

Figure 2.

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.
(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.
(7) Press the 3 positions on the front panel as indicated by the
arrows.(See Figure 5.)

Figure 3.

Plasma
element
holder

Figure 4.

E.O.
SW

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.)

WASH
reset

Figure 5.

OB371_--1qxp 05.1.17 12:50 Page 13

INFORMATION FOR MULTI SYSTEM AIR CONDITIONER
OUTDOOR UNIT : MXZ series
Multi system air conditioner can connect two or more indoor units with one outdoor unit.
•Unit won’t operate in case the total capacity of indoor units exceeds the capacity of outdoor units. Do not
connect indoor units beyond the outdoor unit capacity.
Operation indicator lamp flashes as shown in the figure below.
•When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and
the other for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor
units 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.

Lighted
Blinking
Not lighted

•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.

OB371_--1qxp 05.1.17 12:50 Page 14

9-2. Failure mode recall function
Outline of the function
This air conditioner can memorize the abnormal condition which has occurred once.
Even though LED indication listed on the troubleshooting check table disappears, the memorized failure details can be
recalled.
This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.
1. Flow chart of the indoor/outdoor unit failure mode recall function

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

The cause of abnormality cannot be found because the abnormality doesn't recur.
Setting up the failure mode recall function
Turn ON the power supply.
1 While pressing both OPERATION SELECT
button and TOO COOL button on the remote controller at the same
time, press RESET button.
2 First, release RESET button.
And release the other two buttons since all LCD in operation display
section of the remote controller is displayed after 3 seconds.

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

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

No
(OFF)

Does POWER lamp on the indoor
unit blink at the interval of 0.5 seconds?
Blinks: Either indoor or outdoor unit is abnormal.
Beep sounds are emitted at the same timing
of the blinking of POWER lamp. W2
Judgment of indoor/outdoor abnormality

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

Yes
(Blinks)

Before blinking, does POWER
lamp stay ON for 3 seconds?
Stays ON for 3 seconds (without beep):
The outdoor unit is abnormal.

Yes

No
The indoor unit is abnormal.
Check the blinking pattern, and refer to confirm the
abnormal point(9-2.4.).
Make sure to check at least two consecutive blinking cycles. W2

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

Releasing the failure mode recall function
Release the failure mode recall function by the following procedures.
1With the remote controller headed towards the indoor unit, press any button
that is not used in this failure mode recall function (e.g. TIMER button) .
OR
1Turn OFF the power supply and turn ON it again.
2Press RESET button of the remote controller.
•As for outdoor unit MUZ type, refer to service manual OB372.
As for outdoor unit MXZ type, refer to service manual OB377.
Repair the defective parts.

Deleting the abnormal condition
1After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function" mentioned above.
2Press EMERGENCY OPERATION switch so that the memorized
abnormal condition is deleted.
3Release the failure mode recall function according to "Releasing the
failure mode recall function" mentioned above.
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:
Blinking at 0.52.5-second OFF second interval

Blinking at 0.52.5-second OFF second interval

ON
OFF
Beeps
Repeated cycle

Beeps
Repeated cycle

W3.Blinking pattern when the outdoor unit is abnormal:
Blinking at 0.52.5-second OFF
3-second ON
second interval

2.5-second OFF

3-second ON

Blinking at 0.5second interval

ON
OFF
No beep
Repeated cycle

Beeps

No beep
Repeated cycle

Beeps
Repeated cycle

OB371_--1qxp 05.1.17 12:50 Page 15

2. Flow chart of PLASMA DEODORIZING/PLASMA AIR PURIFYING power failure mode recall function
Operational procedure
There is a possibility that the plasma unit is abnormal.
Confirm the presence of abnormality according to the following procedures.

Confirm that the remote controller is in the failure mode recall
function.
W1. Regardless of normal or abnormal, a short
beep is emitted as the signal is received.

W1
With the remote controller headed towards the indoor unit, press TOO COOL or TOO
WARM button to adjust the set temperature to 23:.
Confirmation of abnormality presence
Does POWER lamp on the indoor
unit blink at the interval of 0.5 seconds? W2
Blinks: The plasma unit is abnormal.
Beep sounds are emitted at the same timing
of the blinking of POWER lamp.

No
(OFF)

Yes
(Blinks)
The plasma unit is abnormal.
Check the blinking pattern, and refer to confirm the
abnormal point(9-2.5.).
Make sure to check at least two consecutive blinking cycles. W2

The plasma unit is normal.

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

Repair the defective parts.

Deleting the abnormal condition
1After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function" mentioned above.
2Press EMERGENCY OPERATION switch so that the memorized
abnormal condition is deleted.
3Release the failure mode recall function according to "Releasing the
failure mode recall function" mentioned above.
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 outdoor unit is abnormal:
Blinking at 0.52.5-second OFF second interval

Blinking at 0.52.5-second OFF second interval

ON
OFF
Beeps
Repeated cycle

Beeps
Repeated cycle

3. PLASMA DEODORIZING/PLASMA AIR PURIFYING power operation check
PLASMA DEODORIZING/PLASMA AIR PURIFYING power goes ON when PLASMA button on the remote controller is pressed
once while the indoor error indication is being checked or after one short beep sound (signal reception beep) is emitted.
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, and it means normal.
Flashing PLASMA/WASH lamp means abnormal, and the plasma power is not being conducted.
PLASMA/WASH lamp
Continuously flashes

Action
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 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.)
NOTE: Perform the above mentioned check with the front panel closed. Panel open is detected by the SAFETY DEVICE
(PLASMA UNIT).
2-time flash

OB371_--1qxp 05.1.17 12:50 Page 16

4. Indoor unit failure mode table
NOTE: Blinking patterns of this mode differs from the ones of Troubleshooting check table(9-4.).

POWER lamp

Abnormal point
(Failure mode)

Detection method

Check point

Not lighted

Normal

–

1-time flash
every 0.5-second

Room temperature
thermistor

When the room temperature thermistor short
Refer to the characteristics of the room
or open circuit is detected every 8
temperature thermistor (9-7.).
seconds during operation.

2-time flash
2.5-second OFF

Indoor coil thermistor

When the indoor coil thermistor short or open Refer to the characteristic of the main
circuit is detected every 8 seconds during
indoor coil thermistor, the sub indoor coil
operation.
thermistor (9-7.).

3-time flash
2.5-second OFF

Serial signal error

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

Refer to 9-6.D "How to check miswiring
and serial signal error".

11-time flash
2.5-second OFF

Indoor fan motor

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

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

12-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.

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

Abnormal point
(Failure mode)

1-time flash

PLASMA DEODORIZING/
PLASMA AIR PURIFYING
power control

When PLASMA DEODORIZING/PLASMA
AIR PURIFYING power cannot be turned
OFF.

2-time flash

Spark discharge

When the voltage between CN1 1(+)
and 2(GND) on the PLASMA POWER P.C. Refer to 9-6.F"Check of PLASMA
board (PLASMA DEODORIZING or PLASMA DEODORIZING power" or 9-6.G"Check
of PLASMA AIR PURIFYING power".
AIR PURIFYING) falls below 1.6V(spark
discharge judgment voltage).

3-time flash

Abnormal electric
discharge error 1

When the voltage between CN1 1(+)
Refer to 9-6.F"Check of PLASMA
and 2(GND) on the PLASMA POWER P.C.
DEODORIZING power" or 9-6.G"Check
board (PLASMA DEODORIZING or PLASMA
of PLASMA AIR PURIFYING power".
AIR PURIFYING) falls 0.9V below the normal
range voltage.

4-time flash

Abnormal electric
discharge error 2

When the voltage between CN1 1(+)
Refer to 9-6.F"Check of PLASMA
and 2(GND) on the PLASMA POWER P.C. DEODORIZING power" or 9-6.G"Check
board (PLASMA DEODORIZING or PLASMA of PLASMA AIR PURIFYING power".
AIR PURIFYING) falls significantly.
(0.4V / 0.5ms)

5-time flash

PLASMA DEODORIZING/
PLASMA AIR PURIFYING
power

Detection method

Check point
Replace the indoor electronic control P.C.
board.

w As soon as an error is detected, PLASMA DEODORIZING power or PLASMA AIR PURIFYING power goes OFF,
therefore measuring instrument which records the voltage wave is required in order to perform the above mentioned voltage measurement.

OB371_--1qxp 05.1.17 12:50 Page 17

9-3. Instruction of troubleshooting
w"Test Run operation"
means the operation
within 30 minutes after
EMERGNCY OPERATION
switch is pressed.

Start

Indoor unit
operates.
Outdoor unit
doesn't
operate.

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

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

Outdoor unit
operates in
only Test Run
operation. w

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

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

Indoor unit
operates, when
EMERGENCY
OPERATION
switch is pressed.

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

Refer to
"How to check
inverter/
compressor".

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

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

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.

OPERATION
INDICATOR
lamp on the
indoor unit
stays off.

PLASMA/WASH lamp
2-time flash
cause:
Indoor unit
• Trouble of PLASMA
DEODORIZNG power
control or PLASMA AIR
PURIFYING power
control

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
electronic control
P.C. board and indoor
fan motor".

Replace the indoor
electronic control P.C.
board.

As for outdoor unit MUZ type,
refer to service manual OB372.
As for outdoor unit MXZ type,
refer to service manual OB377.

All lamps
Flash on and off
at 0.5-second
intervals
Cause:
Indoor unit
• The horizontal
vane is not
installed
correctly.

POWER lamp
Flash on and off
at 0.5-second
intervals
Cause:
Indoor/
Outdoor unit
• Mis-wiring
or trouble
of serial signal

POWER lamp
2-time flash
Cause:
Indoor unit
• Trouble of
room temperature/
indoor coil
thermistor

POWER lamp
3-time flash
Cause:
Indoor unit
• Trouble of
indoor fan
motor

Left lamp
of AREA lamp
4-time flash
Cause:
Indoor unit
• Trouble of
indoor unit
control
system

POWER lamp
5-time flash
Cause:
Outdoor unit
• Outdoor
power
system
abnormality

POWER lamp
6-time flash
Cause:
Outdoor unit
• Trouble of
thermistor
in outdoor
unit

POWER lamp
7-time flash
Cause:
Outdoor unit
• Trouble of
outdoor
control
system

POWER lamp
14-time flash
Cause:
Outdoor unit
• Other
abnormality

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

Refer to 9-6.
D "How to
check of
mis-wiring
and serial
signal error
(when
outdoor unit
doesn't work)".

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

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

Replace the
indoor
electronic
control
P.C. board.

Refer to
"How to check
inverter/
compressor".

Refer to
"Check of
outdoor
thermistors".

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

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

OB371_--1qxp 05.1.17 12:50 Page 18

9-4. Troubleshooting check table
Lighted

· Flashing of POWER lamp indicates abnormalities.

Blinking
Not lighted

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

No.

Abnormal
point

Mis-Wiring
or serial
signal

Operation indicator lamp
POWER lamp flashes.
0.5-second ON

Symptom

Detection method

Check point

Outdoor unit
does not
operate.

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

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

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 lectronic
control P.C. board.

0.5-second OFF

Outdoor
control
system

POWER lamp lights up

Indoor coil
thermistor

POWER lamp flashes.
2-time flash

Room
temperature
thermistor

Indoor fan
motor

Outdoor unit
does not
operate.

Indoor unit
and outdoor
unit do not
operate.

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.

Indoor unit
and outdoor
unit do not
operate.

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

• Refer to 9-7.A "Check of
indoor fan motor".

Indoor unit
and outdoor
unit do not
operate.

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

• Refer to "Check of inverter/
compressor".
Refer to service manual
OB372 or OB377.
Check the stop valve.

Indoor unit
and outdoor
unit do not
operate.

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

• Refer to "Check of outdoor
thermistor".
Refer to service manual
OB372 or OB377.

Indoor unit
and outdoor
unit do not
operate.

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

• Replace the inverter P.C.
board or the outdoor
electronic control P.C. board.
Refer to service manual
OB372 or OB377.

Indoor unit
and outdoor
unit do not
operate.

An abnormality other than above mentioned is
deteced.

• Confirm the abnormarity in
detail using the failure mode
recall function.

2.5-second OFF

POWER lamp flashes.
3-time flash

2.5-second OFF

Outdoor
power
system

POWER lamp flashes.
5-time flash

2.5-second OFF
POWER lamp flashes.
6-time flash
6

Outdoor
thermistors
2.5-second OFF

Outdoor
control
system

POWER lamp flashes.
7-time flash

2.5-second OFF

8 Other
abnonmality

POWER lamp flashes.
14-time flash

2.5-second OFF

NOTE : When the indoor unit has started operation and the above detection method has detected an abnormality (the first
detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with
OPERATION INDICATOR lamp flashing.

OB371_--1qxp 05.1.17 12:50 Page 19

Lighted

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

Blinking
Not lighted

NOTE : Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
Self check table
No.

Abnormal
point

Indoor
control
system

Operation indicator lamp
Left lamp of AREA lamp flashes.
4-time flash

Symptom
Indoor unit
and outdoor
unit do not
operate.

Detection method

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

Check point

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

2.5-second OFF

Lighted

· Flashing of All lamps indicate abnormality.

Blinking
Not lighted

No.

Abnormal
point

Operation indicator lamp

All lamps flash at the same time.
Attachment
0.5-second ON
of the
1
horizontal
vane
0.5-second OFF

Lighted
Blinking

Symptom

Indoor unit
and outdoor
unit do not
operate.

Detection method

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

Check point

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

· Flashing of AREA lamp(both lamps) indicates abnormality.
· POWER lamp is lighted.

Not lighted

No.

Abnormal
point

MXZ type
Operation
mode
setting

Operation indicator lamp
Both lamps flash

Symptom
Outdoor unit
operates but
indoor unit
does not
operate.

2.5-second OFF

Lighted

Detection method
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.

Check point
• Unify the operation mode.
Refer to service manual
OB377.

· Flashing of PLASMA/WASH lamp indicates abnormality.

Blinking
Not lighted

No.

Abnormal
point

Operation indicator lamp

PLASMA
DEODORIZING/ PLASMA/WASH lamp flashes.
2-time flash
PLASMA
1 AIR
PURIFYING
power control
2.5-second OFF

Symptom
Indoor unit
and outdoor
unit do not
operate.

Detection method

When PLASMA DEODORIZING power or
PLASMA AIR PURIFYING power can not be
turned OFF.

Check point

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

OB371_--1qxp 05.1.17 12:50 Page 20

9-5. Trouble criterion of main parts

MSZ-FA25VA - E1
Part name
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(MAIN), RT13(SUB))

Indoor fan motor(MF)

Horizontal vane
motor(MV1)

Vertical vane
motor(MV2)
i-see Sensor
motor(MT)

Front panel
driving motor
(MP)

MSZ-FA35VA - E1
Check method and criterion

Figure

Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C)
Normal
8 k" ~ 20 k"

Abnormal
Open or short-circuit

Check 9-6. A.

RED

Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Color of the lead wire
BRN-other one

Normal
235 " ~ 255 "

ROTOR

Abnormal
Open or short-circuit

Normal
282 " ~ 306 "

Normal
94 " ~ 102 "

Abnormal
Open or short-circuit

w The aluminum block
part is covered with
black vinyl tape.

i-see Sensor(RR)
Connector

i-see Sensor P.C. board

Black
vinyl tape

i-see Sensor
Normal range
Abnormal
connector terminals
1.874 ~ 3.387V DC Below 1.874 or above 3.387V DC
2(-) - 4(+)
1.010 ~ 1.420V DC Below 1.010 or above 1.420V DC
1(+) - 2(-)
NOTE: Pay attention to static electricity.
PLASMA DEODORIZING/
PLASMA AIR PURIFYING
power

Check 9-6. F or G.

ORN

GRN

ROTOR

Abnormal
Open or short-circuit

i-see Sensor

YLW
BRN

RED

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)
Aluminum block

GRN

ROTOR

Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Color of the lead wire
BRN-other one

ORN
RED

Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Color of the lead wire
BRN-other one

YLW
BRN

YLW
BRN
ORN

GRN

OB371_--1qxp 05.1.17 12:50 Page 21

9-6. Troubleshooting flow
When POWER lamp flashes 3-time.
Indoor fan does not operate.

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

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

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

Pay careful attention to the high voltage on
the fan motor connector CN211.
w
Turn ON the power supply, wait 5 seconds or more, and then press
EMERGENCY OPERATION switch.
Measure the supply voltage as follows within 12 seconds
after EMERGENCY OPERATION switch is pressed.
If more than 12 seconds passes by, turn OFF the power supply and
turn ON it again, then measure the voltage.
1.Measure the voltage between CN211 1(+) and 3(-).
2.Measure the voltage between CN211 5(+) and 3(-).

Yes

wIf 12 seconds or more passes after EMERGENCY OPERATION switch
is pressed, the voltage mentioned above 2 goes 0V DC although the
indoor electric control P.C. board is normal.

Adjust the line flow fan and
remove the foreign matter.

Is there 311V DC between
CN211 1 (+) and 3 (-), and does
the voltage between CN211 5(+)
and 3(-) rise to the range of 3 to 6V
DC within 12 seconds after
EMERGENCY OPERATION switch
is pressed?

CN211
Yes

Replace the indoor fan motor.

Indoor electronic
control P.C. board

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?
Unchanged
Replace the indoor fan motor.

Changed

Replace the indoor electronic control P.C. board.

OB371_--1qxp 05.1.17 12:50 Page 22

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

B Check of remote controller and receiver P.C. board
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?

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

(not clear)

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?

Turn on a radio to AM and press switch on
the remote controller.

Yes
No
OK

Is noise heard from radio?

Replace the remote controller.

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

Replace the indoor electronic
control P.C. board.

Yes

● Reinstall the unit away from lights.
● Attach a filter on receiving part.

OB371_--1qxp 05.1.17 12:50 Page 23

The unit does not operate with the remote controller.
Also, POWER lamp does not light up by pressing EMERGENCY OPERATION switch.

C Check of indoor electronic control P.C. board and indoor fan motor
Turn OFF the power supply.
Remove indoor fan motor connector CN211, vane motor
connector CN151 front panel driving motor connector
connector CN1U1 and i-see Sensor motor connector
CN110 from the indoor electronic
control P.C. board and turn ON the power supply.

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

Measure the resistance of the front panel
driving motor coil.
Normal value is approx. 100'

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

Measure the resistance of i-see Sensor
motor coil.
Normal value is approx. 300'
Yes
Does the unit operate with the remote controller?
Does POWER lamp light up by pressing EMERGENCY
OPERATION switch?
Measure the resistance between CN211 3
and 4 of the indoor fan motor connector.
Normal value is approx. 30k' to 50k'.

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

Short circuit:
Replace the indoor fan motor.

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

Replace the varistor(NR11) and fuse(F11).
Yes
Are the varistor(NR11) burnt
and the fuse(F11) blown?
Turn OFF the power supply.
Check both “parts side” and “pattern
side” of the indoor electronic control P.C.
board visually.

Be sure to check both the fuse
and the varistor in any case.
Is the fuse(F11) blown only?
w1,2

Yes

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

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

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.

w3
Is the resistance 1M'
or more?

No
Replace the fuse (F11) and the indoor fan motor.

Yes
Replace the fuse (F11).

Is the resistance
approx. 4'?

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

Yes

Indoor electronic
control P.C.Board

Replace the indoor electronic control P.C. board.
CN211
Varistor(NR11)

CN201
Fuse(F11)

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

OB371_--1qxp 05.1.17 12:50 Page 24

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

Check the power
supply.

Yes
Turn ON the power supply.

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

No
Check the wiring.

Yes
Press EMERGENCY OPERATION switch.

Does POWER lamp light up?

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

Yes

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

Serial signal error display

Yes

Make them sure.

POWER lamp
blinks quickly.
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

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.

Turn ON the power supply of the outdoor unit.

Inverter P.C.board
(Parts side)

LED

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

No
(Lighting)

Replace the inverter
P.C. board.
W2
W2 Be careful to the residual
voltage of smoothing capacitor.

Blinking
Yes
A
· 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?

Yes
B

· Reinstall
either the
unit or the
light each
No
other away.
· Attach a filter
on receiving
section of
the indoor
unit.

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

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?

Yes Replace the
indoor/outdoor
connecting.

No
Yes
Is there 230V AC between outdoor
terminal block S1 and S2?

Yes

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

Replace the indoor electronic control P.C. board.
Be sure to release the failure-mode
recall function after checking.
As for outdoor unit MUZ type,refer to service manual OB372.
As for outdoor unit MXZ type,refer to service manual OB377.

Yes Replace the
indoor/outdoor
connecting.

OB371_--1qxp 05.1.17 12:50 Page 25

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

E Check of installation of the horizontal vane

Start

Turn OFF the
power supply.

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

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

Yes
Turn ON the
power supply.
No
Are all lamp flashing?
Yes
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.

Is there resistance 0 "?

No(∞)

Turn OFF the
power supply.

Replace the
interlock switch(Fan).

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

OB371_--1qxp 05.1.17 12:50 Page 26

When PLASMA/WASH lamp flashes 2-time.
wThe power failure mode for PLASMA DEODORIZING power is memorized when the failure mode is called.
F Check of PLASMA DEODORIZING power
After performing the check, make sure to release the failure mode recall function.
High voltage (approx. -3.9kV) is generated during PLASMA
DEODORIZING power operation.
Pay careful attention and never touch PLASMA/WASH unit
and the high-voltage lead part (red wire).

Turn ON the power supply.

While the operation is being
stopped, does
PLASMA/WASH lamp flash
twice?

Yes
Replace the indoor electronic control P.C. board is out of order.
1 During pressing both OPERATION SELECT
button and TOO COOL button on the remote
controller at the same time, press RESET button.
2 First, release RESET button.
And release the other two buttons since
all LCD in operation display section of the
remote controller is displayed after 3 seconds.
(Failure mode recall function is set.)
3 Press OPERATE/STOP (ON/OFF) button.
4 After a short beep sound is emitted, press
once PLASMA button.
PLASMA DEODORIZING operation is
selected.

No
Make sure that the front panel is firmly closed.
1 During pressing both OPERATION SELECT button and
TOO COOL button on the remote controller at the same time,
press RESET button.
2 First, release RESET button.
And release the other two buttons since
all LCD in operation display section of the
remote controller is displayed after 3 seconds.
(Failure mode recall function is set.)
3 Press OPERATE/STOP (ON/OFF) button.
4 After a short beep sound is emitted, press
once PLASMA button.
PLASMA DEODORIZING operation is
selected.
wThe plasma power operation check mode is set.(Refer to 9-2.5.)

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

PLASMA DEODORIZING power supply is normal.
The front panel is not firmly closed, therefore the
protection by the interlock switch is active.

Stays OFF

w1 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.

Continuously flashes.

Remove the plasma unit, firmly close the
front panel, and then perform PLASMA
DEODORIZING power operation check (w1).
Does PLASMA/WASH lamp stay OFF, or
continuously flash?

PLASMA
DEODORIZING
operation

If the plasma unit is dirty, clean the unit.
After cleaning, make sure to attach the unit when it is
completely dry.
If the air conditioner goes ON with the plasma unit
being wet, protection gets active and PLASMA/WASH
lamp continuously flashes.

Stays OFF

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

No
Firmly fix the SAFETY DEVICE.

Yes
Turn ON and OFF the SAFETY DEVICE
(PLASMA UNIT) using something like a screw
driver, and measure the resistance value between
CN1T2 1 and 3 on the indoor electronic control
P.C. board. Does the switch work?

No
Replace the SAFETY DEVICE(PLASMA UNIT).

Yes
Keep the SAFETY DEVICE(PLASMA UNIT)
ON using something like a screw driver.
Turn ON the power supply.
While the operation is being stopped, is the
voltage between CN1 1(+) and 2(GND)
on the PLASMA POWER P.C. board
(PLASMA DEODORIZING) 0V?

No
9.5V DC is generated.
Replace the indoor electronic control P.C. board.

Yes
Set the plasma power failure mode recall function.

When PLASMA button is pressed, is
there voltage of 12.5V DC between CN1
1(+) and 2(GND)?

Replace the indoor electronic control P.C. board.
Check the wiring of CN1T1 on the indoor electronic control
P.C. board.

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

OB371_--1qxp 05.1.17 12:50 Page 27

When PLASMA/WASH lamp flashes 2-time.
wThe power failure mode for PLASMA AIR PURIFYING power is memorized when the failure mode is called.
G Check of PLASMA AIR PURIFYING power
After performing the check, make sure to release the failure mode recall function.
High voltage (approx. -3.9kV) is generated during
PLASMA AIR PURIFYING power operation.
Pay careful attention and never touch PLASMA/WASH unit
and the high-voltage lead part (red wire).

Turn ON the power supply.

While the operation is being
stopped, does
PLASMA/WASH lamp flash
twice?

Yes
Replace the indoor electronic control P.C. board is out of order.
1 During pressing both OPERATION SELECT
button and TOO COOL button on the remote
controller at the same time, press RESET button.
2 First, release RESET button.
And release the other two buttons since
all LCD in operation display section of the
remote controller is displayed after 3 seconds.
(Failure mode recall function is set.)
3 Press OPERATE/STOP (ON/OFF) button.
4 After a short beep sound is emitted, press
twice PLASMA button.
PLASMA AIR PURIFYING operation is
selected.

No
Make sure that the front panel is firmly closed.
1 During pressing both OPERATION SELECT button and
TOO COOL button on the remote controller at the same time,
press RESET button.
2 First, release RESET button.
And release the other two buttons since
all LCD in operation display section of the
remote controller is displayed after 3 seconds.
(Failure mode recall function is set.)
3 Press OPERATE/STOP (ON/OFF) button.
4 After a short beep sound is emitted, press
twice PLASMA button.
PLASMA AIR PURIFYING operation is
selected.
wThe plasma power operation check mode is set.(Refer to 9-2.5.)

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

PLASMA AIR PURIFYING power supply is normal.
The front panel is not firmly closed, therefore the
protection by the interlock switch is active.

Stays OFF

w1 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.

Continuously flashes.

Remove the plasma unit, firmly close the
front panel, and then perform PLASMA AIR
PURIFYING power operation check (w1).
Does PLASMA/WASH lamp stay OFF, or
continuously flash?

PLASMA AIR
PURIFYING
operation

Stays OFF

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

No
Firmly fix the SAFETY DEVICE.

No
Replace the SAFETY DEVICE(PLASMA UNIT).

Yes
Keep the SAFETY DEVICE(PLASMA UNIT)
ON using something like a screw driver.
Turn ON the power supply.
While the operation is being stopped, is the
voltage between CN1 1(+) and 2(GND) on
the PLASMA POWER P.C. board (PLASMA
AIR PURIFYING) 0V?

No
9.5V DC is generated.
Replace the indoor electronic control P.C. board.

Yes
Set the plasma power failure mode recall function.

When PLASMA button is pressed, is
there voltage of 12.5V DC between CN1
1(+) and 2(GND)?

Replace the indoor electronic control P.C. board.
Check the wiring of CN1T1 on the indoor electronic control
P.C. board.

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

OB371_--1qxp 05.1.17 12:50 Page 28

Indoor unit and outdoor unit do not operate.

H Check of auto front panel

Turn the remote controller ON.

No
Does the front panel automatically
open? (Does it start to move?)

Yes
Is the connector of the front panel
driving motor unit or the indoor
electric control P.C. board unplugged?

Yes

Plug in the connector and
check from the start again.

Is the resistance value between
terminals of the front panel driving
motor unit normal?
Yes

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

Replace the indoor electric
control P.C. board.

Replace the front panel
driving motor unit.

Front panel is normal.

10 mm or
more
Z-Z side view

Replace the front panel
driving motor unit.

OB371_--1qxp 05.1.17 12:50 Page 29

I Electromagnetic noise enters into TV sets or radios

No
Is the unit earthed?

Earth the unit.

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?

Yes

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

No
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?

Yes

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

No
Is there any antennas damage
by rust or something , coaxial
cable damage, or poor
contact such as loosing of
the connectors or wire
disconnection of wiring of the
antennas?

Yes
Replace the antennas.
Replace the coaxial cable.

No
Yes

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

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

No
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.

OB371_--1qxp 05.1.17 12:50 Page 30

9-7. Test point diagram and voltage

MSZ-FA25VA - E1

MSZ-FA35VA - E1

Indoor electronic control P.C. board

5V DC

12V DC

Cement resistance
(R111)
Indoor fan motor
(CN211)
1311V DC
3(-) Fiducial terminal of
cathode side on measuring high-voltage DC
415V DC
5(+)3-6V DC
6(+)0V DC or 15V DC

Power supply input
230V AC

Interlock switch(Fan)
(CN1R1)

{

Room temperature
thermistor (CN111)
Varistor
(NR11)

SW P.C. Board
WASH reset
switch(SW2)

CN2011
(Used for check of conducting of thermal fuse)
Indoor coil thermistor
RT12(MAIN)12
RT13(SUB)34
(CN112)
Plasma deodorizing/air
purifying filter units
(CN1T1)

Emergency
operation
switch(SW1)

Safety device(Plasma unit)
(CN1T2)
Horizontal and
Vertical vane
motor(CN151)

Power monitor
receiver P.C.
board.

}
i-see Sensor
(CN110)
Release of Auto restart
function
Solder the Jumper wire
to JR07.
(Refer to 8-3.)

Fuse
(F11)

Front panel
driving motor
(CN1U1)

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

High-voltage lead wire
(Red)

1DC 2.5V during PLASMA
AIR PURIFYING/PLASMA
DEODORIZING operation
2GND
3DC 12.5V during PLASMA
AIR PURIFYING/PLASMA
DEODORIZING operation

Resistance (k")

Plasma power P.C. board
CN1

Standard lead wire
(Green)

Temperature (:)

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

OB371_--2qxp 05.1.17 12:49 Page 31

DISASSEMBLY INSTRUCTIONS
<"Terminal with locking mechanism" Detaching points>
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.
(1) Slide the sleeve and check if there is a locking lever or not.

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

Sleeve

Locking lever

1Slide the sleeve.
2Pull the terminal while
pushing the locking
lever.

1Hold the sleeve, and
pull out the terminal
slowly.
Connector

MSZ-FA25VA - E1 MSZ-FA35VA - E1
INDOOR UNIT
PHOTOS

OPERATING PROCEDURE
1. Removing the panel

Photo 1

(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.

Front panel

Screws of the panel
Horizontal vane

Photo 2

Screw of the front panel
driving motor

OB371_--2qxp 05.1.17 12:49 Page 32

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 ground 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 ground 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.

Photo 3

Screws of
the terminal
block cover

Drain hose

Screw of the V.A. clamp

Photo 4

Switch holder

Screw of the
electrical cover.

Photo 5

Ground wires

Fan motor
connector (CN211)
Connector of the
interlock switch(Fan)
(CN1R1)

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 ground 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 , the
indoor coil thermistor connector , the vane motor
connector , the connector of the interlock switch
(Fan) of the horizontal vane , the connector of
the safety device (plasma unit) , the connector of
the plasma power P.C. board , the connector of
the front panel driving motor .
(6) Unhook the catches of the electrical box, and pull out the
electrical box. (See Photo3.)

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)

Power monitor
i-see Sensor
receiver P.C.
board holder

Connector of the
front panel driving
motor (CN1U1)
i-see Sensor
cover

OB371_--2qxp 05.1.17 12:49 Page 33

OPERATING PROCEDURE

PHOTOS
Photo 6

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.

Screw of the horizontal
vane motor unit

Photo 7

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.)

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. (See Photo 8.)
(5) Loosen the screw fixing the line flow fan. (See Photo 9.)
(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. (See Photo 10.)
(9) Lift the heat exchanger, and pull out the line flow fan to the
lower-left.

Photo 8

Screws of
the motor
bed

Photo 10
Photo 9

Screws of the
left side of the
heat exchanger

Screw of
the line
flow fan

Motor band

OB371_--2qxp 05.1.17 12:49 Page 34

OPERATING PROCEDURE

PHOTOS

7. Removing the plasma power P.C. board

Photo 11

(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
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.)

Screw of the plasma
element holder

Front panel
driving motor

Photo 12

Plasma unit cover

Photo 13

Terminal
Screw of
Terminal the plasma
electrical box

Safety device
(Plasma unit)
Terminal Plasma
Terminal
power
P.C. board

OB371_--2qxp 05.1.17 12:49 Page 35

PARTS LIST

MSZ-FA25VA - E1 (WH)
MSZ-FA35VA - E1 (WH)
11-1. INDOOR UNIT STRUCTURAL PARTS

11-2. ACCESSORY AND REMOTE
CONTROLLER
10

11-1. INDOOR UNIT STRUCTURAL PARTS
No.
1
2
3
4
5
6
7
8

Part No.
E02
E02
E02
E02
E02
E02
E02
E02

897
913
913
913
914
913
913
913

234
000
067
010
100
100
975
970

Part name

Q'ty/unit
Symbol
in Wiring MSZ-FA25VA - E1 MSZ-FA35VA - E1
Diagram
(WH)
(WH)

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

1
1
2
1
1
1
1
1

1
1

Remarks

Including No.3,4
2PCS/SET

11-2. ACCESSORY AND REMOTE CONTROLLER
9
10

E02 913 426 REMOTE CONTROLLER
E02 527 083 REMOTE CONTROLLER HOLDER

KM05A

OB371_--2qxp 05.1.17 12:49 Page 36

MSZ-FA25VA - E1 (WH)
MSZ-FA35VA - E1 (WH)
11-3. INDOOR UNIT ELECTRICAL PARTS
AND FUNCTIONAL PARTS
30
1

SAFETY
DEVICE
(PLASMA UNIT)

PLASMA
POWER
P.C.BOARD

SLEEVE
BEARING

3
4

5
INTERLOCK
SWITCH
6
(FAN)

21
23

18 SW P.C. BOARD
17
16
POWER MONITOR
RECEIVER P.C. BOARD

14
13

POWER MONITOR
RECEIVER P.C.
BOARD HOLDER

i-see Sensor
MOTOR

11
12

i-see Sensor

11-4. INDOOR UNIT HEAT EXCHANGER
33

FUSE

VARISTOR
NR11

19
ROOM
TEMPERATURE
THERMISTOR

OB371_--2qxp 05.1.17 12:49 Page 37

11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS
No.

Part No.

Part name

Q'ty/unit
Symbol
in Wiring MSZ-FA25VA- E1 MSZ-FA35VA- E1
Diagram
(WH)
(WH)

1
E02 751 509 BEARING MOUNT
1
E02 001 504 SLEEVE BEARING
1
E02 897 702 DRAIN HOSE
1
E02 913 235 NOZZLE ASSEMBLY
1
E02 897 303 VANE MOTOR UNIT (HORIZONTAL) MV1
1
E02 897 316 INTERLOCK SWITCH(FAN)
MV2
1
E02 913 303 VANE MOTOR UNIT (VERTICAL)
1
E02 913 040 HORIZONTAL VANE
F11
1
E02 127 382 FUSE
NR11
1
E02 661 385 VARISTOR
1
E02 913 095 POWER MONITOR RECEIVER P.C. BOARD HOLDER
RR
1
E02 913 391 i-see Sensor
MT
1
E02 914 303 i-see Sensor MOTOR
1
E02 897 784 VA CLAMP
1
E02 897 780 TERMINAL BLOCK COVER
1
E02 897 779 TERMINAL BLOCK HOLDER
TB
1
E02 913 375 TERMINAL BLOCK
1
E02 913 452 ELECTRONIC CONTROL P.C. BOARD W1
18
E02 914 452 ELECTRONIC CONTROL P.C. BOARD W1
1
19 E02 897 308 ROOM TEMPERATURE THERMISTOR RT11
RT12, RT13
1
E02 913 307 INDOOR COIL THERMISTOR
20
RT12, RT13
E02 914 307 INDOOR COIL THERMISTOR
1
21 E02 913 782 SWITCH HOLDER
MF
1
22 E02 897 300 INDOOR FAN MOTOR W2
1
23 E02 897 333 MOTOR BAND
MP
1
24 E02 898 303 FRONT PANEL DRIVING MOTOR
1
25 E02 897 302 LINE FLOW FAN
1
26 E02 913 775 PLASMA ELEMENT HOLDER
1
27 E02 913 776 PLASMA UNIT COVER
1
28 E02 913 777 PLASMA ELECTRICAL BOX
2
29 E02 897 440 PLASMA POWER P.C. BOARD
1
30 E02 898 316 SAFETY DEVICE (PLASMA UNIT)
1
31 E02 913 774 PLASMA AIR PURIFYING FILTER UNIT PLASMA_A
1
32 E02 914 774 PLASMA DEODORIZING FILTER UNIT PLASMA_D
W1 Including SW P.C. BOARD and POWER MONITOR RECEIVER P.C. BOARD
W2 Including FAN MOTOR RUBBER MOUNT (2 PCS/SET)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

1
1
1
1
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

UP & DOWN
RIGHT & LEFT
3.15A

AUTO RESTART
AUTO RESTART

RC0J40-

11-4. INDOOR UNIT HEAT EXCHANGER
33
34
35

E02
E02
E02
E02

913
914
815
151

620
620
666
667

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

1
1
1

{9.52
{6.35

OB371_--2qxp 05.1.17 12:49 Page 38

OPTIONAL PARTS

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.

Deodorizing ceramic filter

(1)
(2)

(4) Install the deodorizing ceramic filter by following the
removal procedure in reverse.

Model
MSZ-FA25VA MSZ-FA35VA -

Part No.
E1
E1

MAC-305FT-E

OB371_--2qxp 05.1.17 12:49 Page 39

OB371_--2qxp 05.1.17 12:49 Page 40

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

C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in Jan. 2005. No. OB371 6
Made in Japan

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

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Page Count                      : 40
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XMP Toolkit                     : XMP toolkit 2.9.1-13, framework 1.6
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Create Date                     : 2005:01:17 12:52:53Z
Modify Date                     : 2005:04:07 16:36:24+02:00
Metadata Date                   : 2005:04:07 16:36:24+02:00
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Mitsubishi Electronics Msz Fa35Va Users Manual

MSZ-FA35VA to the manual 163b9e8f-ff35-4186-97e2-72bb48d65f3e

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