Mitsubishi MS-A08VD-P1, MS-A10VD-P1, MS-A13VD-P1 Service Manual

SERVICE MANUAL

SPLIT-TYPE, AIR CONDITIONERS

Wireless type
Models

No. OB396

MS-A08VD­MS-A10VD­MS-A13VD-

Indication of model name

MS-A08VD ­MS-A10VD ­MS-A13VD -

P1
P1
P1

P1

P1

P1

CONTENTS

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

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

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

4. OUTLINES AND DIMENSIONS·························5

5. WIRING DIAGRAM ············································6

6. REFRIGERANT SYSTEM DIAGRAM················6

7. SERVICE FUNCTIONS ······································7

8. TROUBLESHOOTING········································9

9. DISASSEMBLY INSTRUCTIONS ····················18

10. PARTS LIST······················································20

NOTE:

• This service manual describes technical data of indoor units.

• As for outdoor units MU-A08VD - ,MU-A10VD - and MU-A13VD - , refer to the service manual OB397.

TM

P1P1P1

1

TECHNICAL CHANGES

MS-07UV - ➔ MS-A08VD -

MS-10UV - ➔ MS-A10VD ­MS-13UV - ➔ MS-A13VD -

1. Indoor unit has been changed.

• Front panel has been changed. (Grill ➔ Flat)

• Dimension has been changed. (850W

2. Easy clean function has been added.

3. Catechin air filter has been added.

4. Air cleaning filter has been added.

5. Fan motor has been changed.

6. Fan motor capacitor has been changed.

7. P.C. board has been changed.

8. Fin pattern of cooler has been changed.

9. Remote controller has been changed.

• OPERATE/STOP(ON/OFF) button and TEMPERATURE buttons have been remodeled to be luminous.

P1P1

P1P1

P1P1

o278Ho191D ➔ 815Wo278Ho244D)

2

Installation plate
Installation plate fixing screw 4 x 25 mm
Remote controller holder
Fixing screw for 3 3.5 x 16 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
Air cleaning filter

1
5
1
2
2
1
1
2

1
2
3
4
5
6
7
8

MS-A10VD -

MS-A08VD -

P1
P1

MS-A13VD -

P1

2

PART NAMES AND FUNCTIONS

INDOOR UNIT

MS-A08VD ­MS-A10VD ­MS-A13VD -

P1

P1

P1

Air cleaning filter
(white bellows type)

Front panel
Air inlet

Panel

Catechin air filter
(with deodorizing)

Air outlet

Vertical vanes

Fan

Horizontal vane

Operation section

(When the front panel is opened)

Emergency operation switch

to Breaker

Power supply cord

Remote control
receiving section

Remote controller

Display section

Operation indicator lamp
Remote control

receiving section

ACCESSORIES

3

Indoor model

Function

Power supply

Air flow

(High/Medw/Loww)
Power outlet
Running current
Power input
Auxiliary heater
Fan motor current
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Air direction
Sound level (High/Medw/Loww)
Fan speed(High/Medw/Loww)
Fan speed regulator
Thermistor RT11(at 25:)
Thermistor RT12(at 25:)
Remote controller model

K /h

A
A

W

A(kW)

A

"

mm

kg

dB

rpm

k"
k"

630/558

w

/486w

0.19
40

0.19

RC4V19-HA
WHT-BLK 224
BLK-RED 318

10

42/36

w

/29

w

960/850w/740

w

Electrical

data

Fan

motor

Special

remarks

Capacity

630/498w/360w

0.17
35

0.17

RC4V19-JA
WHT-BLK 283
BLK-RED 188

9

39/32

w

/26

w

960/760w/550

w

Cooling

Single phase

220-230-240V, 50Hz

10

815O278O244

5

3
10
10

MP04B

MS-A08VD - P1 MS-A10VD - P1 MS-A13VD - P1

REMOTE CONTROLLER

MS-A08VD ­MS-A10VD ­MS-A13VD -

P1

P1

P1

Signal transmitting section

Operation display section

OPERATE/STOP (ON/OFF) button

ON/OFF

TOO

WARM

h

TOO

COOL

These buttons are able to store the light
from nature, fluorescent lamp, etc and
shine in the dark.

3

ECONO COOL button

POWERFUL COOL button

OPERATION SELECT button

TIMER MODE SELECT button

SPECIFICATION

I FEEL

COOL

DRYFAN

ECONO COOL

POWERFUL COOL

SELECT

FAN

VANE

TIMEMODE

RESET

TEMPERATURE buttons

FAN SPEED CONTROL button

VANE CONTROL button

TIME SET button

Indication of remote controller
model is on back.

RESET button

NOTE: Test conditions are based on JIS C 9612.

Cooling : Indoor DB27°C / WB19°C
Indoor-Outdoor piping length : 5 m
W Reference value

Outdoor DB35°C / WB24°C

4

OUTLINES AND DIMENSIONS4

MS-A08VD ­MS-A10VD -

INDOOR UNIT

278

60

57

140

P1

P1

783

815

606

Installation plate

Indoor unit

149

17.5

Power supply cord
Lead to right 1.0m
Lead to left 0.3m

81.5

41

81.5

Air in

30

Air out

326326

242 5

7 or more

90

110

244

133.5

231.5

42

2.5

81.5

Wall hole

Installation plate

Liquid line
Gas line

{

Insulation

Drain hose
(Connected part O,D)

Insulation

[65

[6.35-0.5m

[9.52-0.43m

[37 O.D

[21 I.D

[16

[28

4.5

271

Unit : mm

Wireless remote controller

MS-A13VD -

P1

INDOOR UNIT

278

60

57

140

606

783

815

Installation plate

Indoor unit

149

17.5

Power supply cord
Lead to right 1.0m
Lead to left 0.3m

41

Air in

30

Air out

242

7 or more

244

326326

5

Installation plate

Liquid line
Gas line

{

Insulation

90

Drain hose

110

(Connected part O,D)
Insulation

161.5161.5

218.5

42

2.5

81.581.5
Wall hole

[6.35-0.5m

[9.52-0.43m

[37 O.D

[21 I.D

[16

[28

17.5

258

[65

Wireless remote controller

5

5

WIRING DIAGRAM

MS-A08VD - MS-A10VD - MS-A13VD -

INDOOR UNIT

TB

L

BRN

2
N

BLU

BRN

WHT

BLU

GRN/YLW

GRN/YLW

NAME

F12

BLU
BLU

GRN

TO OUTDOOR
UNIT
CONNECTING

220-230-240V~

POWER
SUPPLY
CORD
220-230-240V

~/N 50Hz

SYMBOL

C11
F11
F12

MF

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

INDOOR FAN CAPACITOR
FUSE(3.15A)
THERMAL FUSE(93:)
INDOOR FAN MOTOR(INNER FUSE)

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

3. Symbols below indicate.

/: Terminal block, : Connector

MODELS WIRING DIAGRAM

1

BLU

2

LD103

CN

151

5

MV

SYMBOL

MV
NR11
RT11
RT12

SAFETY
DEVICE(FAN)

VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR

P1P1P1

CN201

3
2
1

CN CN

1R1

CN

109

125

2

3

NAME NAME

3

52C

4

F11

ELECTRONIC CONTROL P.C. BOARD

2

POWER MONITOR,
RECEIVER
P.C.BOARD

T11

NR11

SR141

SYMBOL

SR141

TB

T11

52C

CN

112

CN

111

3

CN

121

1

C11

3
5

CN211

REMOTE
CONTROLLER

SOLID STATE RELAY
TERMINAL BLOCK
TRANSFORMER
CONTACTOR

RT12
RT11

BLK
GRY
YLW
BRN
WHT
RED

1
2
3

MF

4
5
6

6

REFRIGERANT SYSTEM DIAGRAM

MS-A08VD ­MS-A10VD -

INDOOR UNIT

Indoor
heat
exchanger

RT11
Room

temperature
thermistor

P1

P1

Indoor coil
thermistor
RT12

Refrigerant pipe
(Option){9.52

(with heat insulator)

Flared
connection

Flared
connection

MS-A13VD -

INDOOR UNIT

Indoor
heat
exchanger

RT11
Room
temperature
thermistor

P1

Indoor coil
thermistor
RT12

Unit : mm

Refrigerant pipe
(Option){12.7

(with heat insulator)

Flared
connection

Flared
connection

Refrigerant pipe
(Option){6.35

(with heat insulator)

Refrigerant pipe
(Option){6.35

(with heat insulator)

Refrigerant flow in cooling

6

7

SERVICE FUNCTIONS

MS-A08VD ­MS-A10VD ­MS-A13VD -

P1

P1

P1

7-1. 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 8-6.)
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.

7-2. 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 : MP04B

J2

J1

NOTE : For remodelling, take out the bat-

teries and push 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.

7

JR07

IC101

CN151

SW1

CN112

CN111

CN201

52C

C11

CN211

CN1V1

CN1R1

CN121

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

1 unit operation
No modification

–
–
–

2 units operation

Same as at left

Solder J1

–
–

3 units operation

Same as at left
Same as at left

Solder J2

–

4 units operation

Same as at left
Same as at left
Same as at left

Solder both J1 and J2

Table 1

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the
remote controller for the indoor unit.
The indoor unit only accepts the signal from the remote controller that has been assigned to the indoor unit once they are
set.
The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.

7-3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, 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. However if the unit is operated in “I FEEL
CONTROL” mode before power failure, the operation is not memorized. In “I FEEL CONTROL” mode, the operation is
decided by the initial room temperature.

Operation

1If the main power has been cut, the operation settings remain.
2After the power is restored, the unit automatically resumes the same operation

as the memory has recorded.
However, it takes the compressor at least 3 minutes to get started.

How to release “AUTO RESTART FUNCTION”

1Turn off the main power for the unit.
2Pull out the indoor electronic control P.C. board and the power monitor, receiver

P.C. board. (Refer to 9-1.)

3Solder the Jumper wire to the JR07 on the indoor electronic control P.C.board.

(Refer to 8-6.)

NOTE:

•The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote

controller.

•If the main power is turned off or a power failure occurs while AUTO START/STOP timer is active, the timer setting is

cancelled.

•If the unit has been off with the remote controller before power failure, the auto restart function does not work as the

power button of the remote controller is off.

•To prevent breaker off due to the rush of starting current, systematize other home appliances 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

TROUBLESHOOTING8

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

RESET button

MS-A08VD ­MS-A10VD ­MS-A13VD -

P1

P1

P1

8-1. Cautions on troubleshooting

1. Before troubleshooting, check the following:

1) Check the power supply voltage.

2) Check the indoor/outdoor connecting wire for mis-wiring.

2. Take care the following during servicing.

1).Before servicing the air conditioner, be sure to turn off the main unit first with the remote controller, and then after con­firming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.

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

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

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

Lead wiring

3. Troubleshooting procedure

1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.

To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2) Before servicing 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 discolouration.

4) When troubleshooting, refer to 8-2. and 8-3.

4. How to replace batteries

Weak batteries may cause the remote controller malfunction.
In this case, replace the batteries to operate the remote controller normally.

1 Remove the back lid and insert batteries.

Then reattach the back lid.

Housing point

2 Press the RESET button with tip end of ball point

pen or the like, and then use the remote controller.

NOTE : 1. If the 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.

9

5. How to install the horizontal vanes

6

5 4

3

2 1

In procedure 2,3,5, and 6, lock the stoppers until they click into place.

Stopper

Lock.

Stopper

Lock.

Lock.

Lock.

In.

Insert.

Insert.

In.

If horizontal vanes are not installed correctly, both of the operation indicator lamps will flash.
In this case, install the horizontal vanes correctly by following the procedures 1 to 6.

NOTE: Before installation of the horizontal vanes, disconnect the power supply plug and/ or turn off the breaker.

Upper vane

Lower vane

The holes on the
insertion ends of
the upper and lower
horizontal vanes have
different shapes.

Insert this end first.

Upper right

Lower right

Insert this end first.

10

8-2. Instruction of troubleshooting

Start

Indoor unit
operates.
Outdoor unit
doesn't
operate.

Outdoor unit
operates in
only Test Run
operation.

Check room
temperature
thermistor.
Refer to 8-6.
"Test point
diagram and
voltage".

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

Check of
wiring
diagram
of outdoor
unit.

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

Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.

Refer to 8-5. 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 the
EMERGENCY
OPERATION
switch is pressed.

1. Check indoor /
outdoor
connecting wire.

2. Refer to 8-5. C
"Check of indoor
electronic control
P.C. board".

Both lamps
(Left and right)
Flash on and off at

0.5-second intervals
Cause:
Indoor unit

• The horizontal vanes
are not installed
correctly.

Refer to 8-5. D
"Check of installation
of the horizontal vane".

Left lamp
2-time flash
Cause:
Indoor unit

• Trouble of room
temperature/
indoor coil
thermistor

Check room
temperature
thermistor and
indoor coil thermistor.
Refer to 8-6.
"Test point diagram
and voltage".

Left lamp
3-time flash
Cause:
Indoor unit

• Trouble of
indoor fan
motor

Refer to 8-5.A
"Check of
indoor fan
motor".

Left lamp
4-time flash
Cause:
Indoor unit

• Trouble of
indoor control
system

Replace the
indoor
electronic
control P.C.
board.

As for outdoor unit,
refer to service
manual OB397.

11

Operation Indicator

· Flashing of the OPERATION INDICATOR lamp (on the left)
indicates possible abnormalities.

· The OPERATION INDICATOR lamp (on the left) is
lighting during normal operation.

flashing

• The following indication applies regardless of shape of the indicator.

No.

2

SymptomIndication Detection method

Check point

Indoor coil
thermistor

3

Indoor fan
motor.

Abnormal

point

Room
tempera­ture
thermistor

2-time flash

2.5-second OFF

Detect Indoor coil/room temperature
thermistor short or open circuit every 8
seconds during operation.

• Refer to the characteristics of
indoor coil thermistor and
room temperature thermistor
shown in 8-6.

3-time flash

2.5-second OFF

Indoor fan
motor repeats
12 seconds
ON and 3
minutes OFF.
When the
indoor fan
motor breaks,
the fan keeps
stopping.

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

• Refer to 8-5.A "Check of

indoor fan motor".

Outdoor unit
does not
operate.

Left lamp flashes.

Left lamp flashes.

Indoor
control
system

4-time flash

2.5-second OFF

Left lamp flashes.

4

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

Outdoor unit
does not
operate.

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

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 the
OPERATION INDICATOR lamp flashing.

1

0.5-second ON

0.5-second OFF

When the electricity is not conducted to the
safety device (FAN) of the horizontal vane.

• Refer to 8-5. D "Check of
installation of the horizontal
vanes".

Indoor unit
and outdoor
unit do not
operate.

Attachment
of the
horizontal
vane

Both lamps flash at the same time.

8-3. Troubleshooting check table

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

12

RED

YLW
BRN

ORN

GRN

ROTOR

8-4. Trouble criterion of main parts

MAIN
AUX.

BLK

REDWHT

FUSE

MS-A08VD ­MS-A10VD ­MS-A13VD -

Part name

Room
temperature
thermistor

Indoor coil
thermistor
(RT12)

Indoor fan
motor (MF)

INNER FUSE
145i 2: CUT OFF

(RT11)

P1

P1

P1

Check method and criterion

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

Normal

8k" ~ 20k"

Open or short-circuit

Measure the resistance between the terminals with a tester.
(Coil wiring temperature10°C ~ 30°C)

Color of lead wire

Normal

MS-A08/A10VD

Motor part

WHT-BLK
BLK-RED

271~294"
180~195"

Measure the voltage Power ON.

Normal

4.5 ~ 5.5V

0V➔5V➔0V

(Approx.)

Sensor part

Color of lead wire

BRN-YLW

(When fan revolved one time)

YLW-GRY

Abnormal

MS-A13VD

215~233"
305~331"

Abnormal

Remain 0V or 5V

Figure

Abnormal

Open or

short-circuit

Vane motor
(MV)

Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)

Normal Abnormal

240 ~ 260"

Open or short-circuit

13

8-5. Troubleshooting flow

When left OPERATION INDICATOR lamp flashes 3-time.
Indoor fan motor doesn’t operate.

AA

Check of indoor fan motor

Turn OFF the power supply.
Check connector CN211 visually.

No

Reconnect the lead wires.

Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board.
Measure resistance between lead wires: No.1 and No.5 and then No.3 and No.5.

Are lead wires connected?

Is resistance 0 (short circuit) or ∞ (open circuit)?

Yes

Yes ( 0 or ∞ )

Repair the indoor fan motor.

Is soldering point of the connector

correctly soldered?

Yes

Insert screwdriver into air outlet to rotate indoor fan
motor slowly for 1 revolution or over, and measure
voltage No.2(+) and No.3(-) on CN121.

No

(others)

No

Does voltage repeat 0V DC and 5V DC?

Replace the indoor electronic control P.C. board.

No

Resolder it.

Yes

Indoor unit operates by pressing the EMERGENCY OPERATION switch, but doesn’t operate with the remote controller.

BB

Check of remote controller and receiver P.C. board

w Check if the remote controller is exclusive for this air conditioner.

Switch on the remote controller.

Is LCD display on the remote con­troller visible?

Yes

Remove batteries, then set them back and
press the RESET button.
Check if the unit operates with remote con­troller.

Does the unit operate with remote
controller?

Yes

OK

Measure the voltage between receiver P.C. board connector CN302 No.3
when the remote controller button is pressed.

No
(not clear)

No

Replace the power monitor, receiver P.C.board.

Replace the batteries.
(Refer to 8-1.4.)

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

Is noise heard from radio?

Yes

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

No

Is the voltage approx. 4V DC?

No(5V or 0V DC)

No

Yes

(-)

and No.5

Yes

Replace the remote controller.

● Reinstall the unit away from lights.

● Attach a filter on receiving part.

(+)

Replace the indoor electronic control
P.C. board

14

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

Replace the fuse.

Is fuse(F11) blown?

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

Replace the fan
motor.

Replace the
indoor electronic
control P.C. board.

Is the winding
resistance of
fan motor 0 "?

Is the winding
resistance of
vane motor 0 "?

No

Yes

Replace the vane
motor.

No

Yes

Yes

Is varistor(NR11) burnt?

Replace the varistor.

Yes

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

No

No

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

Yes

No

1.Pull out the power
supply cord.

2.Measure the
resistance between
CN201

1 on

the indoor electronic
control P.C. board
and

N on the

terminal block with
a tester.

Is there resistance
approx. 0 "?

Replace the fuse (F12).

CN201

1

2

L
N

F12

13

Terminal
block

Be sure to check both resistance.

Turn OFF the
power supply.

Turn OFF the
power supply.

Yes

No(

∞)

The unit doesn’t operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.

Check of indoor electronic control P.C. board

C

15

When both OPERATION INDICATOR lamps flash ON and OFF every 0.5-second.
Indoor unit and outdoor unit don’t operate.

Check of installation of the horizontal vane

D

Start

Turn OFF the
power supply.

No

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

Yes

Relock the stopper of the
horizontal vane to the indoor unit.
Refer to 8-1-5.

Turn ON the
power supply.

To check the continuity of safety device,
measure the resistance of connector 1 - 3
connected to CN1R1 on the indoor
electronic control P.C. board.

No(∞)

Is there resistance 0 "?

Yes

Replace the
indoor electronic
control P.C. board.

Replace the
safety device.

Is the OPERATION
INDICATOR lamp flashing?

Yes

Turn OFF the
power supply.

No

OK

16

8-6. Test point diagram and voltage

MS-A08VD ­MS-A10VD ­MS-A13VD -

Indoor electronic control P.C. board

Varistor
(NR12)

Varistor
(NR11)

P1

P1

P1

Fuse 250V AC 3.15A

Power supply input
220-230-240V AC

}

Indoor fan motor
220-230-240V AC

}

Safety device of
fan by horizontal
vane CN1R1

Room temperature
thermistor (RT11)

Indoor coil
thermistor (RT12)

J12

12V

+

{

DC

–

J33

Power monitor, receiver P.C. board

CN302

}

J33

+–

}

5V DC

J23

Timer short mode
point JPG, JPS

}

(Refer to 7-1.)

Emergency
operation switch

Release of Auto restart function
Solder the Jumper wire to the JR07.
(Refer to 7-3.)

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

17

Resistance (k")

Temperature (:)

DISASSEMBLY INSTRUCTIONS9

<"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

Sleeve

mechanism.

1Slide the sleeve.
2Pull the terminal while

Locking lever

pushing the locking
lever.

9-1. MS-A08VD - MS-A10VD - MS-A13VD -

INDOOR UNIT

OPERATING PROCEDURE PHOTOS

1. Removing the panel

(1) Remove the screw caps of the panel.

Remove the screws.

(2) Pull the panel down to your side slightly and unhook the

catches at the top.

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

Connector

P1P1P1

Photo 1

Screws of the panel

2. Removing the electronic control P.C. board and the
power monitor, receiver P.C. board

NOTE : In case of removing only indoor electronic control

P.C. board work (3) is not necessary.
(1) Remove the panel. (Refer to 1.)
(2) Remove the power monitor, receiver P.C. board

holder from the bottom of electrical box.

(3) Open the power monitor, receiver P.C. board holder and

remove the power monitor, receiver P.C. board.

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

cover.
(5) Remove the screw of the V.A. clamp and the V.A. clamp.
(6) Remove the screw of the cord clamp and the cord clamp.
(7) Remove the screw of the terminal block.
(8) Remove the screw of the ground wire.
(9) Pull out indoor electronic control P.C. board slightly.
(10)

Disconnect all (except CN125, CN109) the connectors on

the electronic control P.C. board.
(11)

Remove the electronic control P.C. board.

(12)

Disconnect the connector of power monitor, receiver P.C.

board (CN 125, CN109) on the electronic control P.C.

board.

18

Photo 2

Screw of the
ground wire

Power monitor, receiver
P.C. board holder

Terminal block
fixing screw

Indoor electronic
control P.C. board

Cord clamp fixing
screw

Screw of the V.A.
clamp

Screw of the
electrical cover

OPERATING PROCEDURE PHOTOS

3. Removing the electrical box

(1) Remove the panel. (Refer to 1.)
(2) Remove the electrical cover. (Refer to 2.)
(3) Remove the V.A. clamp. (Refer to 2.)
(4) Remove the cord clamp. (Refer to 2.)
(5) Remove the terminal block. (Refer to 2.)
(6) Remove the screw of ground wire. (Refer to 2.)
(7) Disconnect the connector of the indoor coil thermistor

(CN112), the fan motor connector (CN211 and CN121) and
the vane motor connector (CN151)on the electronic control
P.C. board.

(8) Remove the fan motor lead wire and indoor coil thermistor

from the electrical box.

(9) Remove the lead wire of vane motor from the bottom of

electrical box.

(10)

Remove the screw fixing the electrical box, remove the

electrical box.

4. Removing the nozzle assembly and the vane motor

(1) Remove the panel. (Refer to 1.)
(2) Remove the electrical box. (Refer to 3.)
(3) Pull out the drain hose from the nozzle assembly, remove

the nozzle assembly.

(4) Remove the screws of the vane motor, disconnect the

vane motor connector.

(5) Remove the vane motor.

Photo 3

Photo 4

Indoor coil thermistor
connector

Fan motor connectors

Screws of the vane motor

Vane motor
connector

Screw of the
electrical box

5. Removing the indoor fan motor and the line flow fan

(1) Remove the panel. (Refer to 1.)
(2) Remove the electrical box. (Refer to 3.)
(3) Pull out the drain hose from the nozzle assembly, and

remove the nozzle assembly. (Refer to 4.)
(4) Remove the screw of the lead cover and lead cover.
(5) Release the hooks to open the motor band slightly.
(6) Loosen the hexagon socket set screw from the line flow

fan.
(7) Remove the screws fixing the motor bed, and remove the

fan motor with motor band and the motor bed.
(8) Remove the screws fixing the left side of the heat

exchanger.
(9) Lift the left side of the heat exchanger.
(10)

Remove the line flow fan.

Photo 6

Hexagon socket set screw

Drain hose

Photo 5

Screws of the
left side of the
heat exchanger

Photo 7

Screw of
the lead
cover

Hooks of the
motor band

Screws of
the motor
bed

19

PARTS LIST10

MS-A08VD ­MS-A10VD ­MS-A13VD -

P1

P1

P1

10-1. INDOOR UNIT STRUCTURAL PARTS

1

2

3

4

5

6

9(W)

8

7 (See 10-5.)

10-2. ACCESSORY AND REMOTE

CONTROLLER

10

11

(W) This figure shows MS-A13VD.

10-1. INDOOR UNIT STRUCTURAL PARTS

Symbol

No. Part No.

E02 763 234

1

E02 764 234

2

E02 940 000

3

E02 763 067

4

E02 940 010

5

E02 408 142
E02 763 100

6

E02 764 100

7
8

E02 763 975
E02 408 970

9

E02 751 970

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

Part name

in Wiring

Diagram

10-2. ACCESSORY AND REMOTE CONTROLLER

10

E02 846 426

11

E02 527 083

REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER

MS-

A08VD -

1

1
2
1
2
2

2
1
1

1
1

Q'ty/unit

P1

A10VD -

MS-

1

1
2
1
2
2

2
1
1

1
1

P1

A13VD -

MS-

1
1
2
1
2

2
2
1

1

1
1

Remarks Price

P1

Including No.3,4,5
2PCS/SET

2PCS/SET
2PCS/SET
2PCS/SET
MAC-1300FT

MP04B

20

MS-A08VD -

No. Part No.

Part name

Remarks Price

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

E02 001 504
E02 661 702
E02 815 235
E02 815 316
E02 965 040
E02 965 041
E02 127 382
E02 661 385
E02 815 385
E02 763 034
E02 815 468
E02 940 452
E02 941 452
E02 942 452
E02 749 303
E02 151 308
E02 665 300
E02 678 300
E02 749 333
E02 427 375
E02 749 311
E02 749 302
E02 408 509
E02 751 509
E02 408 381

MS-

A08VD-

P1

MS-

A10VD-

P1

MS-

A13VD-

P1

22

23
24

E02 749 620
E02 751 620
E02 151 666
E02 155 666
E02 151 667

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

{9.52
{12.7
{6.35

1

1

1

1

1

1

1

1
1

SLEEVE BEARING
DRAIN HOSE
NOZZLE ASSEMBLY
SAFETY DEVICE
VANE UPPER
VANE LOWER
FUSE
VARISTOR
VARISTOR
VANE CRANK SET
POWER MONITOR, RECEIVER P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
VANE MOTOR
ROOM TEMPERATURE THERMISTOR
INDOOR FAN MOTOR(

RC4V19

- )

INDOOR FAN MOTOR(

RC4V19

- )
MOTOR BAND
TERMINAL BLOCK
INDOOR COIL THERMISTOR
LINE FLOW FAN
BEARING MOUNT
BEARING MOUNT
THERMAL FUSE

3.15A

AUTO RESTART
AUTO RESTART
AUTO RESTART

3P

93:

F11
NR12
NR11

MV

RT11

MF
MF

TB

RT12

F12

1
1
1
1
1
1
1
1
1
1
1

1

1
1
1

1
1
1
1
1

1

1
1
1
1
1
1
1
1
1
1
1
1

1
1
1

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

Including fan motor rubber
mount 2PCS/SET

Including fan motor rubber
mount 2PCS/SET

MS-A10VD ­MS-A13VD -

P1

P1

P1

10-3. INDOOR UNIT ELECTRICAL PARTS

AND FUNCTIONAL PARTS

10-4. INDOOR UNIT HEAT EXCHANGER

SLEEVE
BEARING

1
3

4
5

6

10-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

Part number that is circled is not shown in the illustration.

10-4. INDOOR UNIT HEAT EXCHANGER

20

19

18

15

2

16

13

10

7

FUSE

8

VARISTOR

9

ROOM TEMPERATURE
THERMISTOR

14

11

12

17

22(W)

23
24

(W) This figure shows MS-A13VD.

21

10-5. AIR CLEANING FILTER

Model

Part No.

P1
P1
P1

MAC-1300FT

With frame type

MS-A08VD­MS-A10VD­MS-A13VD-

● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity.

● Normal life of AIR CLEANING FILTER is 4 months. However, when it becomes dirty, replace it as soon as possible.

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

● Do not reuse AIR CLEANING FILTER even if it is washed.

● Do not remove or attach AIR CLEANING FILTER during unit operation.

NOTE: The frame is necessary for the installation of AIR CLEANING FILTER on the unit.

Air cleaning filter
(White bellows type)

22

23

TM

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

CC

Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD.
Distributed in Mar. 2005. No.OB396 106
Made in Japan

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