Mitsubishi Electric MSZ-FA25VA Manual de usuario

SERVICE MANUAL

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

Wireless type

Models

MSZ-FA25VA - (WH)

MSZ-FA35VA - (WH)

No. OB371

SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS

Indication of model name

MSZ-FA25VA -

MSZ-FA35VA - E1

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. E1E1E1

E1E1E1

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1TECHNICAL CHANGES

MSZ-A09YV - ➔MSZ-FA25VA -

MSZ-A12YV - ➔MSZ-FA35VA - E1E1

E1E1

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).

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

Do not disassemble the horizontal 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.

Generalized stepping motor

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.

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.

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PART NAMES AND FUNCTIONS

INDOOR UNIT

MSZ-FA25VA -

MSZ-FA35VA - E1

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

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ACCESSORIES

Installation plate

Installation plate fixing screw 4 o25 mm

Remote controller holder

Fixing screw for 33.5 o1.6 mm (Black)

Battery (AAA) for remote controller

Wireless remote controller

Felt tape (Used for left or left-rear piping)

MSZ-FA25VA - E1

MSZ-FA35VA - E1

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 - E1

REMOTE CONTROLLER

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SPECIFICATION

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 - E1 MSZ-FA35VA - E1

(F11)

(MP)

(MT)

(MV1)

(MV2)

(NR11)

(RR)

(TB)

Specifications and rating conditions of main electric parts

MSZ-FA25VA - E1 MSZ-FA35VA - E1

Indoor model

Function

Power supply Single phase

230V,50Hz

0.25

—

0.25

RC0J40-EB

780O298O198

36W/29W/21W

KM05A

Cooling

594

474W/354W/252W

1,220

1,010W/800W/610W

Heating

612

498W/384W/264W

1,250

1,050W/850W/640W

Single phase

230V,50Hz

0.25

—

0.25

RC0J40-EB

780O298O198

36W/29W/22W

KM05A

Cooling

594

474W/354W/258W

1,220

1,010W/800W/630W

Heating

612

498W/384W/276W

1,250

1,050W/850W/660W

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

A(kW)

dB(A)

rpm

Electrical

data

Fan motor

Special

remarks

Capacity

MSZ-FA25VA - E1 MSZ-FA35VA - E1

Indoor model

Function Cooling

546

450W/348W/252W

1,130

960W/790W/610W

Heating

540

420W/372W/264W

1,120

910W/830W/640W

Cooling

516W/390W/258W

1,080W/860W/630W

Heating

522W/402W/276W

1,090W/880W/660W

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

dB(A)

rpm

Special

remarks

Capacity

36W/29W/21W

642

36W/29W/22W

1,300

NOTE : Test conditions are based on ISO 5151

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

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

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

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

Refrigerant piping length (one way): 5m

wReference value

✽1 Measured under rated operating frequency.

When outdoor unit is MXZ type.

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4NOISE CRITERIA CURVES

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

COOLING

FUNCTION

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

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,

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

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

COOLING

FUNCTION

SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

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

MSZ-FA25VA - E1 MSZ-FA35VA - E1

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OUTLINES AND DIMENSIONS

MSZ-FA25VA - E1 Unit : mm

INDOOR UNIT

780

155 155

335 320

41.5 215

42.5 214

3 287.5

7055

5555 225 225

298

106

or more7

100

198 5

53.5 102624.5

159

234 14273.5

Air in

Air out

Wall hole [65

Indoor unit

Installation plate

11o20 Oblong hole

11o26 Oblong hole

10 or more

75 or more

55 or morew

75 or more

wIn case of left, left back, or

left under piping (using spacer),

113 or more

Insulation [28

Drain hose [16

(Connected part O.D)

Liquid line [6.35 - 0.5m

Gas line [9.52 - 0.43m

Insulation [35 O.D

[19 I.D

{

Required space (Indoor unit)

Wireless remote controller

MSZ-FA35VA - E1

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6WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

MSZ-FA25VA - E1

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Indoor coil

thermistor

RT13(sub)

Flared connection

Refrigerant flow in cooling

Refrigerant flow in heating

Refrigerant pipe [9.52

(with heat insulator)

Refrigerant pipe [6.35

(with heat insulator)

Indoor coil

thermistor

RT12(main)

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Indoor coil

thermistor

RT13(sub)

Flared connection

Refrigerant pipe [9.52

(with heat insulator)

Refrigerant pipe [6.35

(with heat insulator)

Indoor coil

thermistor

RT12(main)

INDOOR UNIT

Unit : mm

INDOOR UNIT MODELS WIRING DIAGRAM

SYMBOL

DB111

F11

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

PLASMAAIR 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

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 -

MSZ-FA35VA - E1

INDOOR UNIT

230V~

BLU

INDOOR ELECTRONIC

CONTROL P.C. BOARD

PLASMA_DPLASMA_A

SAFETY DEVICE

(PLASMA UNIT)

SW P.C.

BOARD

POWER MONITOR

RECEIVER P.C. BOARD

INTERLOCK

SWITCH(FAN)

MV2

MV1

TO OUTDOOR

UNIT

CONNECTING

BLK

RED

TB TAB3

DB111

NR11

F11

1U1

1T2

1T1

110

105(T)

101(A)

12-24V

RT13

1R1

GRN

LD104

CN201

151

T111

RED

WHT

111

112

CN211 BLU

YLW

BLK

RT11

RT12

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SERVICE FUNCTIONS

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.

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.)

MSZ-FA25VA -

MSZ-FA35VA - E1

No. 1 unit

No. 2 unit

No. 3 unit

No. 4 unit

1 unit operation

No modification

–

2 units operation

Same as at left

Solder J1

–

3 units operation

Same as at left

Solder J2

–

4 units operation

Same as at left

Solder both J1 and J2

Table 1

How to set the remote controller exclusively for particular indoor unit.

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote

controller for the indoor unit.

The indoor unit will only 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.

How to modify the remote controller P.C. board

Remove batteries before modification.

The board has a print as shown below :

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.

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.

Remote controller model : KM05A

Operation

1If the main power has been cut, the operation settings remain.

2After 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.)

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.

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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.

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

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 in-

stalledatright, left or

center?

(Left) (Center) (Right)

Side swich

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