Mitsubishi MSZ-FA35VA, MSZ-FA25VA-E1, MSZ-FA25VA-E1WH, MSZ-FA35VA-E1, MSZ-FA35VA-E1WH Service Manual

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SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Wireless type Models

(WH)

MSZ-FA25VA MSZ-FA35VA -

No. OB371

Indication of model name

MSZ-FA25VA MSZ-FA35VA -

NOTE:

This service manual describes technical data of the indoor units.

•As for outdoor units MUZ-FA25VA- , MUZ-FA35VA- , MUZ-FA25VAH- and MUZ-FA35VAH- , refer to service manual OB372.

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

refer to service manual OB377.

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

E1E1E1

Page 2

TECHNICAL CHANGES

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.

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.

E1E1 E1E1

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).

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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").

Auto front panel

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSZ-FA25VA MSZ-FA35VA -

Page 4

1 2 3 4 5 6 7

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

MSZ-FA25VA -

MSZ-FA35VA -

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

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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

INDOOR UNIT

Item

Model

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

MSZ-FA25VA -

MSZ-FA35VA -

(F11)

(MP)

(MT) (MV1) (MV2)

(NR11)

(RR)

(TB)

MSZ-FA25VA -

MSZ-FA35VA -

Indoor model

Function

Power supply

Single phase

230V,50Hz

0.25 33 — 57

0.25

RC0J40-EB

780O298O198

36W/29W/21

4 10 10 10

KM05A

Cooling

594

474W/354W/252

1,220

1,010W/800W/610

Heating

612

498W/384W/264

1,250

1,050W/850W/640

Single phase

230V,50Hz

0.25 33 — 57

0.25

RC0J40-EB

780O298O198

36W/29W/22

4 10 10 10

KM05A

Cooling

594

474W/354W/258

1,220

1,010W/800W/630

Heating

612

498W/384W/276

1,250

1,050W/850W/660

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

K /h K /h

A A

A(kW)

dB(A) dB(A)

rpm rpm

k" k" k"

Electrical

data

Fan motor

Special

remarks

Capacity

MSZ-FA25VA -

MSZ-FA35VA -

Indoor model

Function

Cooling

546

450W/348W/252

1,130

960W/790W/610

Heating

540

420W/372W/264

1,120

910W/830W/640

Cooling

516W/390W/258

1,080W/860W/630

Heating

522W/402W/276

1,090W/880W/660

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

K /h K /h

dB(A) dB(A)

rpm rpm

Special

remarks

Capacity

36W/29W/21

642

36W/29W/22

1,300

SPECIFICATION

When outdoor unit is MXZ type.

NOTE : Test conditions are based on ISO 5151

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

w Reference value

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

✽1 Measured under rated operating frequency.

Specifications and rating conditions of main electric parts

Page 6

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

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 -

Page 7

OUTLINES AND DIMENSIONS

MSZ-FA25VA MSZ-FA35VA -

INDOOR UNIT

298

53.5 102624.5 58

E1 E1

780

11o26 Oblong hole

Installation plate

41.5 215

Indoor unit

100

Air out

11o20 Oblong hole

155 155

335 320

Air in

198 5

or more7

106

Wall hole

Installation plate

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

{

[19 I.D

Drain hose [16 (Connected part O.D)

Insulation [28

5555 225 225

214

7055

Unit : mm

14273.5

234

3 287.5

42.5

[65

159

Wireless remote controller

Required space (Indoor unit)

75 or more

10 or more

75 or more

55 or morew

wIn case of left, left back, or

left under piping (using spacer),

113 or more

Page 8

SYMBOL

DB111

F11

MP MT

MV1

SYMBOL

MV2

NR11 PLASMA_A PLASMA_D

RT11

SYMBOL

RT12 RT13

T111

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 THERMISTOR

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

WIRING DIAGRAM

MSZ-FA25VA MSZ-FA35VA -

INDOOR UNIT

TO OUTDOOR UNIT CONNECTING

GRN

MV1

230V~

12-24V

LD104

151

MV2

MODELS WIRING DIAGRAM

S1 S2 S3

1R1

INTERLOCK SWITCH(FAN)

POWER MONITOR RECEIVER P.C. BOARD

BLK

BLU RED

101(A)

105(T)

SW P.C. BOARD

TAB3

2 1

CN201

F11

NR11

110

DB111

INDOOR ELECTRONIC CONTROL P.C. BOARD

T111

CN 1T1

1T2

PLASMA_DPLASMA_A

SAFETY DEVICE (PLASMA UNIT)

4 3

112

2 1

111

1 2 3 4 5 6

1U1

CN211

RED

BLK WHT YLW BLU

RT13 RT12

RT11

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

MSZ-FA25VA -

INDOOR UNIT

REFRIGERANT SYSTEM DIAGRAM

Refrigerant pipe [9.52

MSZ-FA35VA -

INDOOR UNIT

(with heat insulator)

Indoor coil

Indoor heat exchanger

thermistor RT12(main)

Flared connection

Indoor heat exchanger

Indoor coil thermistor RT13(sub)

Room temperature thermistor RT11

Indoor coil thermistor RT12(main)

Indoor coil thermistor RT13(sub)

Unit : mm

Refrigerant pipe [9.52 (with heat insulator)

Flared connection

Refrigerant flow in cooling Refrigerant flow in heating

Refrigerant pipe [6.35 (with heat insulator)

Flared connection

Refrigerant pipe [6.35 (with heat insulator)

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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 :

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.

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

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.

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

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.)

Page 10

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.

Page 11

Stopper

Lock.

Left

Insert this end first.

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 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.

Lead wiring

2 Press RESET button with tip end of ball point pen

or the like, and then use the remote controller.

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.

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

In procedure

stoppers until they click into place.

lock the

Page 12

WASH

reset

E.O.

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.

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 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.)

Figure 5.

Page 13

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.

Page 14

9-2. Failure mode recall function

Operational procedure

Yes

(Blinks)

(OFF)

Yes

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:

OFF

Beeps

Repeated cycle Repeated cycle

OFF

No beep Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5second interval

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Repeated cycle

Beeps

Does 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

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 refer to confirm the abnormal point(9-2.4.). Make sure to check at least two consecutive blinking cycles. W2

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

Deleting the abnormal condition

1After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall function" mentioned above. 2Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. 3Release the failure mode recall function according to "Releasing the failure mode recall function" mentioned above.

Repair the defective parts.

Release the failure mode recall function by the following procedures. 1With the remote controller headed towards the indoor unit, press any button that is not used in this failure mode recall function (e.g. TIMER button) . OR

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

Judgment of indoor/outdoor abnormality

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

Indoor unit is normal. There is a possibility that the 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.

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

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

remote controller at the same time, press RESET button. 2 First, release RESET button. And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds.

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

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

1. Flow chart of the indoor/outdoor unit failure mode recall function

Page 15

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 outdoor unit is abnormal:

Yes

(Blinks)

(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? W2 Blinks: The plasma unit is abnormal. Beep sounds are emitted at the same timing of the blinking of POWER lamp.

Deleting the abnormal condition

Repair the defective parts.

Confirmation of abnormality presence

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

The plasma unit is normal.

Releasing the failure mode recall function

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

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

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

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

There is a possibility that the plasma unit is abnormal. Confirm the presence of abnormality according to the following procedures.

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

ActionPLASMA/WASH lamp

Continuously flashes

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 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 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.

3. PLASMA DEODORIZING/PLASMA AIR PURIFYING power operation check

NOTE: Perform the above mentioned check with the front panel closed. Panel open is detected by the SAFETY DEVICE

(PLASMA UNIT).

Page 16

4. Indoor unit failure mode table

12-time flash

2.5-second OFF

Replace the indoor electronic control P.C. board.

Indoor control system

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

11-time flash

2.5-second OFF

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

Indoor fan motor

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

2-time flash

2.5-second OFF

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

Indoor coil thermistor

When the indoor coil thermistor short or open circuit is detected every 8 seconds during operation.

3-time flash

2.5-second OFF

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

Serial signal error

When the serial signal from 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

Check point

Abnormal point

(Failure mode)

Detection method

5-time flash

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

When the voltage between CN1 1(+) and 2(GND) on the PLASMA POWER P.C. board (PLASMA DEODORIZING or PLASMA AIR PURIFYING) rises above the normal voltage value (3V).

4-time flash

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

PLASMA DEODORIZING/ PLASMA AIR PURIFYING power

When the voltage between CN1 1(+) and 2(GND) on the PLASMA POWER P.C. board (PLASMA DEODORIZING or PLASMA AIR PURIFYING) 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 1(+) and 2(GND) on the PLASMA POWER P.C. board (PLASMA DEODORIZING or PLASMA AIR PURIFYING) falls 0.9V below the normal range voltage.

2-time flash

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

Replace the indoor electronic control P.C. board.

Spark discharge

1-time flash

PLASMA DEODORIZING/ PLASMA AIR PURIFYING power control

When the voltage between CN1 1(+) and 2(GND) on the PLASMA POWER P.C. board (PLASMA DEODORIZING or PLASMA AIR PURIFYING) falls below 1.6V(spark discharge judgment voltage).

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

POWER lamp

Check point

Abnormal point

(Failure mode)

Detection method

Abnormal electric discharge error 2

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

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

w As soon as an error is detected, PLASMA DEODORIZING power 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.

Page 17

9-3. Instruction of troubleshooting

Start

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

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

Indoor unit operates. Outdoor unit doesn't operate.

Outdoor unit operates in only Test Run operation. w

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

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

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

Refer to "How to check inverter/ compressor".

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

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

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

Indoor unit operates, when EMERGENCY OPERATION switch is pressed.

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

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

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

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

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

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

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.

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

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 (when outdoor unit doesn't work)".

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".

POWER lamp 3-time flash Cause: Indoor unit

• Trouble of indoor fan motor

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

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

• Trouble of indoor unit control system

Replace the indoor electronic control P.C. board.

POWER lamp 5-time flash Cause: Outdoor unit

• Outdoor power system abnormality

Refer to "How to check inverter/ compressor".

POWER lamp 6-time flash Cause: Outdoor unit

• Trouble of thermistor in outdoor unit

Refer to "Check of outdoor thermistors".

POWER lamp 7-time flash Cause: Outdoor unit

• Trouble of outdoor control system

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

POWER lamp 14-time flash Cause: Outdoor unit

• Other abnormality

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

Page 18

No.

SymptomOperation indicator lamp Detection method

Check point

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 witth in 1 minute after start-up.

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

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

• Refer to "Check of outdoor thermistor".

Refer to service manual OB372 or OB377.

• Refer to "Check of inverter/ compressor".

Refer to service manual OB372 or OB377. Check the stop valve.

• Replace the inverter P.C. board or the outdoor

electronic control P.C. board.

Refer to service manual

OB372 or OB377.

• Refer to 9-6.D "How to check

mis-wiring and serial signal

error".

Indoor fan motor

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 9-7.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.

Other abnonmality

An abnormality other than above mentioned is deteced.

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

Indoor unit and outdoor unit do not operate.

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 lectronic control P.C. board.

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

· Flashing of POWER lamp indicates abnormalities.

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

Self check table

NOTE : When the indoor unit has started operation and the above detection method has detected an abnormality (the first

detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing.

Page 19

Lighted

No.

SymptomOperation indicator lamp Detection method

Check point

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.

SymptomOperation indicator lamp Detection method

Check point

Abnormal

point

0.5-second ON

0.5-second OFF

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

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

Indoor unit and outdoor unit do not operate.

Attachment of the horizontal vane

All lamps flash at the same time.

No.

SymptomOperation indicator lamp Detection method

Check point

Abnormal

point

MXZ type

Operation mode setting

Outdoor unit operates but indoor unit does not operate.

When the operation mode of the each indoor unit is differently set to COOL(includes DRY) and HEAT at the same time, the operation mode of the indoor unit that has operated at first has the priority.

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

2.5-second OFF

Both lamps flash

Lighted Blinking Not lighted

No.

SymptomOperation indicator lamp Detection method

Check point

Abnormal

point

PLASMA/WASH lamp flashes. 2-time flash

2.5-second OFF

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

Indoor unit and outdoor unit do not operate.

PLASMA DEODORIZING/ PLASMA AIR PURIFYING power control

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

Blinking Not lighted

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

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

Self check table

Lighted Blinking Not lighted

· Flashing of All lamps indicate abnormality.

· Flashing of AREAlamp(both lamps) indicates abnormality.

· POWER lamp is lighted.

NOTE : When the indoor unit has started operation and the above detection method has detected an abnormality (the first

detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing.

· Flashing of PLASMA/WASH lamp indicates abnormality.

Page 20

9-5. Trouble criterion of main parts

Part name FigureCheck method and criterion

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

Normal

8 k" ~ 20 k"

Abnormal

Open or short-circuit

Room temperature thermistor(RT11)

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

Horizontal vane motor(MV1)

Normal

BRN-other one

Abnormal

Open or short-circuit

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

235 " ~ 255 "

Color of the lead wire

Vertical vane motor(MV2)

i-see Sensor motor(MT)

Normal

Abnormal

Open or short-circuit

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

Front panel driving motor (MP)

Normal

Abnormal

Open or short-circuit

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(-)

Below 1.874 or above 3.387V DC Below 1.010 or above 1.420V DC

1.874 ~ 3.387V DC

1.010 ~ 1.420V DC

i-see Sensor connector terminals

Abnormal

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 -

E1E1

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

Page 21

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

Indoor electronic control P.C. board

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

Yes

Changed

Unchanged

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

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

Adjust the line flow fan and remove the foreign matter.

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

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

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

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

Yes

Replace the indoor fan motor.

CN211

Replace the indoor electronic control P.C. board.

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

Check of indoor fan motor

Page 22

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

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

No (not clear)

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

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

Is noise heard from radio?

Yes

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

Replace the indoor electronic control P.C. board.

Yes

Replace the remote controller.

● Reinstall the unit away from lights.

● Attach a filter on receiving part.

Page 23

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

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.

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

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. Normal value is approx. 100'

Measure the resistance of i-see Sensor motor coil. Normal value is approx. 300'

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'.

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

Yes

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

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

Is the fuse(F11) blown only?

w1,2

Yes

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

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

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.

Indoor electronic control P.C.Board

CN201

Fuse(F11)

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

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

CN211

Varistor(NR11)

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

Is the resistance 1M' or more?

Yes

Replace the fuse (F11).

Replace the indoor electronic control P.C. board.

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.

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

Yes

Page 24

When POWER lamp flashes ON and OFF in every 0.5-second.

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

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

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

W1. Mis-wiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts.

(Lighting)

Yes

W2 Be careful to the residual voltage of smoothing capacitor.

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

Yes

Serial signal error display

Yes

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

Inverter P.C.board (Parts side)

LED

Blinking

Turn OFF the power supply.

Turn ON the power supply.

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

Does POWER lamp light up? <Confirmation of the power to the indoor unit>

Press EMERGENCY OPERATION switch.

Check the power supply.

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

POWER lamp blinks quickly.

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

Short-circuit outdoor terminal block S2 and S3. W1

Turn ON the power supply of the outdoor unit.

Check the wiring.

Make them sure.

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

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

Replace the indoor electronic control P.C. board.

Replace the inverter P.C. board. W2

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

Replace the indoor/outdoor connecting.

Is serial signal error indicated 6 minutes later?

Yes

· Turn OFF inverter-controlled lighting equipment.

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

· Press EMERGENCY OPERATION switch.

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

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

Outdoor unit does not operate.

How to check mis-wiring and serial signal error

Page 25

Start

Replace the indoor electronic control P.C. board.

Replace the interlock switch(Fan).

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

Yes

Is there resistance 0 "?

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

Yes

Are all lamp flashing?

Yes

No(∞)

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.

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

Page 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.

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.)

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

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.

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.

Yes

9.5V DC is generated.

Yes

Replace the indoor electronic control P.C. board. Check 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/WASH unit and the high-voltage lead part (red wire).

Yes

Stays OFF

PLASMA DEODORIZING operation

Continuously flashes.

Stays OFF

Continuously flashes.

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

Turn ON the power supply.

Replace the indoor electronic control P.C. board is out of order.

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?

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

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

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?

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?

Set the plasma power failure mode recall function.

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

Replace the indoor electronic control P.C. board.

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

Replace the SAFETY DEVICE(PLASMA UNIT).

Firmly fix the SAFETY DEVICE.

(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.

The power failure mode for PLASMA DEODORIZING power is memorized when the failure mode is called.

Check of PLASMA DEODORIZING power

Page 27

When PLASMA/WASH lamp flashes 2-time.

PLASMA AIR PURIFYING operation

Make sure that the front panel is firmly closed.

(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.)

(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.

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

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

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.

Yes

9.5V DC is generated.

Yes

Replace the indoor electronic control P.C. board. Check 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/WASH unit and the high-voltage lead part (red wire).

Yes

Stays OFF

Continuously flashes.

Stays OFF

Continuously flashes.

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

Turn ON the power supply.

Replace the indoor electronic control P.C. board is out of order.

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?

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

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

Set the plasma power failure mode recall function.

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

Replace the indoor electronic control P.C. board.

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

Replace the SAFETY DEVICE(PLASMA UNIT).

Firmly fix the SAFETY DEVICE.

The power failure mode for PLASMA AIR PURIFYING power is memorized when the failure mode is called.

Check of PLASMA AIR PURIFYING power

Page 28

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

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

Turn the remote controller ON.

Plug in the connector and check from the start again.

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

Replace the indoor electric control P.C. board.

Replace the front panel driving motor unit.

Yes

Indoor unit and outdoor unit do not operate.

Check of auto front panel

10 mm or more

Z-Z side view

Page 29

Electromagnetic noise enters into TV sets or radios

Replace the antennas. Replace the coaxial cable.

Yes

Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3m?

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

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

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

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

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

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

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

4.Layout of ; indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, grounding wire, antennas, wiring from antennas, receiver

5.Electric field intensity of the broadcast station affected by the electromagnetic noise

6.Presence or absence of amplifier such as booster

7.Operation condition of air conditioner when the electromagnetic noise enters in.

1)Turn OFF the power supply once, and then turn ON the power supply. In this situation check for the electromagnetic noise.

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

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

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

After checking the above, consult the service representative.

Is the unit earthed?

Earth the unit.

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

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

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

Page 30

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

E1E1

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)

Safety device(Plasma unit) (CN1T2)

Horizontal and Vertical vane motor(CN151)

Power monitor receiver P.C. board.

Plasma power P.C. board

High-voltage lead wire (Red)

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

(Refer to 8-3.)

CN1

i-see Sensor (CN110)

1DC 2.5V during PLASMA

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)

Timer short mode point JPG, JPS

}

(Refer to 8-1.)

Page 31

(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 -

E1E1

INDOOR UNIT

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

Screw of the front panel driving motor

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.

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 <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

Ground 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

Page 33

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

Page 34

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

Page 35

PARTS LIST11

MSZ-FA25VA - (WH) MSZ-FA35VA - (WH)

11-1. INDOOR UNIT STRUCTURAL PARTS

5 6

11-2. ACCESSORY AND REMOTE

CONTROLLER

11-1. INDOOR UNIT STRUCTURAL PARTS

Symbol

No.

E02 897 234

E02 913 000

E02 913 067

E02 913 010

E02 914 100

E02 913 100

E02 913 975

E02 913 970

Part No.

Part name

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

in Wiring

Diagram

11-2. ACCESSORY AND REMOTE CONTROLLER

E02 913 426

E02 527 083

REMOTE CONTROLLER REMOTE CONTROLLER HOLDER

Q'ty/unit

MSZ-FA25VA -

(WH)

1 1 2 1 1 1 1 1

1 1

MSZ-FA35VA -

(WH)

1 1 2 1 1 1 1 1

1 1

Remarks

Including No.3,4 2PCS/SET

KM05A

Page 36

MSZ-FA25VA - (WH) MSZ-FA35VA - (WH)

11-3. INDOOR UNIT ELECTRICAL PARTS

AND FUNCTIONAL PARTS

SAFETY DEVICE

(PLASMA UNIT)

PLASMA POWER P.C.BOARD

SLEEVE BEARING

INTERLOCK SWITCH (FAN)

POWER MONITOR RECEIVER P.C. BOARD

POWER MONITOR RECEIVER P.C. BOARD HOLDER

i-see Sensor

i-see Sensor MOTOR

SW P.C. BOARD

17 16

15 14

11-4. INDOOR UNIT HEAT EXCHANGER

FUSE

VARISTOR NR11

ROOM TEMPERATURE THERMISTOR

Page 37

BEARING MOUNT SLEEVE BEARING DRAIN HOSE NOZZLE ASSEMBLY 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

3.15A

AUTO RESTART AUTO RESTART

RC0J40-

MV1

MV2

F11

NR11

RR MT

RT11 RT12, RT13 RT12, RT13

PLASMA_A PLASMA_D

(WH)

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-

MSZ-FA35VA-

33 34

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 127 382 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 897 300 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

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

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)

11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

11-4. INDOOR UNIT HEAT EXCHANGER

Page 38

12 OPTIONAL PARTS

(1)

(2)

Deodorizing ceramic filter

MAC-305FT-E

Model Part No.

MSZ-FA25VA - MSZ-FA35VA -

E1 E1

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.

Page 39

Page 40

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

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

Mitsubishi MSZ-FA35VA, MSZ-FA25VA-E1, MSZ-FA25VA-E1WH, MSZ-FA35VA-E1, MSZ-FA35VA-E1WH Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual