Mitsubishi MS-C08VC-F1, MS-C10VC-F1, MS-C13VC-F1 Service Manual

SPLIT-TYPE AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Models

No. OBH536

MS-C08VC ­MS-C10VC ­MS-C13VC -

F1

F1

F1

Outdoor unit service manual

MU-C·VC Series (OBH537)

CONTENTS

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

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

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

4. OUTLINES AND DIMENSIONS ························ 3

5. WIRING DIAGRAM ············································ 4

6. REFRIGERANT SYSTEM DIAGRAM ··············· 4

7. SERVICE FUNCTIONS ····································· 5

8. MICROPROCESSOR CONTROL ····················· 7

9. TROUBLESHOOTING ····································· 12

10. DISASSEMBLY INSTRUCTIONS ···················· 21

PARTS CATALOG (OBB536)

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

TM

1

TECHNICAL CHANGES

MS-C08VC ­MS-C10VC ­MS-C13VC -

1. New model

F1
F1
F1

2

PART NAMES AND FUNCTIONS

MS-C08VC
MS-C10VC
MS-C13VC

Panel

Air outlet

Vertical vane

Air cleaning filter (Option)
(Anti-Allergy Enzyme Filter,
Blue bellows type)

Heat exchanger

Air inlet
Front panel

Catechin air filter

Remote controller

Horizontal vane

Display section

Remote control
receiving section

Emergency operation switch (E.O. SW)

ACCESSORIES

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

2

Operation Indicator
lamp

1
5
1
2
2
1
1

3

SPECIFICATION

Indoor model
Function

Power supply

Breaker capacity
Running current
Power input

Electrical

data

Model
Fan motor current

Fan

motor
Dimensions W
Weight

H D

A
A

W

A

mm

kg

MS-C08VC MS-C10VC MS-C13VC

Cooling

Single phase

220-230-240 V, 50 Hz

0.22

RC4V18-BA

0.22

788

295 225

Air direction

3

/h

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

Special

remarks

m

dB

rpm

558/420/288

39/32/26

1,000/800/600

618/456/288

40/33/26

1,090/850/600

Fan speed regulator

Remote controller model

MP07A

NOTE : Test conditions are based on ISO 5151.
Cooling : Indoor Dry-bulb temperature 27 °C Wet-bulb temperature 19 °C
Outdoor Dry-bulb temperature 35 °C Wet-bulb temperature 24 °C
Indoor outdoor piping length : 5 m

10

45

9
4

624/480/330

42/36/29

1,100/880/660

3

4

OUTLINES AND DIMENSIONS

MS-C08VC
MS-C10VC
MS-C13VC

2255

58

42

57

140

17.5

295

42

58

788

60753 128

Installation plate

Indoor unit

50

11X26 Oblong hole

254.5

21540.5

Insulation

42

Liquid line

Gas line

Piping
Drain hose

Unit : mm

11X20 Oblong hole

5959 225 225

214

155 155

320335

Air in

Installation plate

Piping

8

42

100

Air out

Φ35 O.D
Φ6.35 - 0.5m (Flared connection Φ6.35)

MS-C08/C10VCΦ9.52 - 0.43m (Flared connection Φ9.52)
MS-C13VCΦ12.7- 0.43m (Flared connection Φ12.7)
InsulationΦ28 Connected part Φ16 O.D

119
137

57

2

7459

Wall hole

Drain hose

41.5
Φ65

18.5

235

253.5

3

5

WIRING DIAGRAM

MS-C08VC
MS-C10VC
MS-C13VC

6

REFRIGERANT SYSTEM DIAGRAM

MS-C08VC
MS-C10VC
MS-C13VC

Indoor
heat
exchanger

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT12

Unit : mm

Refrigerant pipe Φ9.52 (MS-C08/C10VC)
Φ12.7 (MS-C13VC)
(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe Φ6.35
(with heat insulator)

Refrigerant flow in cooling

4

7

SERVICE FUNCTIONS

MS-C08VC
MS-C10VC
MS-C13VC

7-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on 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

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 :

→ 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is

J2

J1

NOTE : For modification, take out

the batteries and press
the OPERATE/STOP(ON/
OFF)button twice or 3
times at first.

After modification, 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

4 units operation

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

Solder both J1 and J2

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

–

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 accept 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.

5

7-3. 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

When the main power is cut off, 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.)

How to release “AUTO RESTART FUNCTION”

1

Turn off the main power for the unit.

2

Solder the Jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 9-7.)

MS-C08/C10/C13VC

Indoor electronic
control P.C. board

CN10A CN111CN151 CN112

JR07

NOTE:

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

remote controller.

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

cancelled.

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

6

8

MICROPROCESSOR CONTROL

MS-C08VC MS-C10VC MS-C13VC

WIRELESS REMOTE CONTROLLER

Signal transmitting section

Operation display section

OPERATE/STOP (ON/OFF) button

ECONO COOL button

POWERFUL COOL button

OPERATION SELECT button

TIMER MODE SELECT button

NOTE: • Last setting will be stored after the unit is turned OFF with the remote controller.

• Indoor unit receives the signal of the remote controller with beeps.

INDOOR UNIT DISPLAY SECTION

Operation Indicator lamp

The operation indicator at the right side of the indoor
unit indicates the operation state.

Operation Indicator

Lighted
Not lighted

Indication

Operation state

This shows that the
air conditioner is
operating to reach
the target temperature.
Please wait until the
target temperature is
obtained.

TEMPERATURE buttons

FAN SPEED CONTROL button

VANE CONTROL button

TIME SET button

RESET button

Difference
between target
temperature
and room
temperature

Approx. 2°C
or more

This shows that the
room temperature is
approaching the
target temperature.

7

Approx. 2°C
or less

8-1. COOL ( ) OPERATION

(1) Press OPERATE/STOP(ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select COOL mode with OPERATION SELECT button.
(3) Set TEMPERATURE buttons.
Press TOO WARM or TOO COOL button to select the desired temperature.
The setting range is 16 ~ 31°C.

1. Coil frost prevention

When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.
The indoor fan operates at the set speed and the compressor stops.
This mode continues until the temperature of indoor heat exchanger rises.

8-2. DRY (

)OPERATION

(1) Press OPERATE/STOP(ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select DRY mode with OPERATION SELECT button.
(3) The set temperature is determined from the initial temperature.

1. Coil frost prevention

• The operation is the same as coil frost prevention during COOL mode.

8-3. FAN (

)OPERATION

(1) Press OPERATE/STOP(ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select FAN mode with OPERATION SELECT button.

(3) Select the desired fan speed. When AUTO, it becomes Low.
Only indoor fan operates.
Outdoor unit does not operate.

8-4. “I FEEL CONTROL” (

(1) Press OPERATE/STOP(ON/OFF) button on the remote controller.

) OPERATION

Initial room temperature

Mode

OPERATION INDICATOR lamp of the indoor unit turns on with a beep
tone.
(2) Select “I FEEL CONTROL”(

) mode with the
OPERATION SELECT button.
(3) The operation mode is determined by the initial room

25°C or more

more than 13°C,

less than 25°C

COOL mode of

“I FEEL CONTROL”

DRY mode of

“I FEEL CONTROL”

temperature at start-up of the operation.

• Once the mode is fixed, the mode is not changed by room temperature afterwards.

• Under ON-TIMER (

When the system is stopped by the remote controller and restarted within 2 hours in “I FEEL CONTROL”

) operation, the mode is determined as follows:

( ) mode, the

system operates in previous mode automatically regardless of the room temperature.

Operation time chart
Example

Previous operation

COOL mode of
“I FEEL CONTROL”
or COOL mode

Restart

COOL mode of
“I FEEL CONTROL”

When the system is restarted after 2 hours and more, the operation mode is determined by the room temperature at

start-up of the operation.

Operation time chart
Example

Previous operation

COOL mode of
“I FEEL CONTROL”
or COOL mode

Restart

COOL or DRY mode of
“

I FEEL CONTROL”
determined
temperature at start-up
of the operation.

that

by room

8