Mitsubishi MS-A18WV-E1, MS-A24WV-E1, MS-A30WV-E1 Service Manual

SERVICE MANUAL

SPLIT-TYPE, AIR CONDITIONERS

Wireless type Models

E1

(WH)

CONTENTS

MS-A18WV MS-A24WV MS-A30WV -

No. OB325

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

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

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

4. NOISE CRITERIA CURVES·······························5

5. OUTLINES AND DIMENSIONS·························6

6. WIRING DIAGRAM ············································7

7. REFRIGERANT SYSTEM DIAGRAM················8

8. MICROPROCESSOR CONTROL ······················9

Indication of model name

MS-A18WV MS-A24WV MS-A30WV -

NOTE:

This service manual describes technical data of the indoor units. As for outdoor units MU-A18WV- , MU-A24WV- and MU-A30WV- , refer to service manual OB326.

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9. SERVICE FUNCTIONS ····································17

10. TROUBLESHOOTING ······································19

11. DISASSEMBLY INSTRUCTIONS·····················27

12. PARTS LIST······················································29

13. OPTIONAL PARTS ···········································31

E1E1E1

1

Grille

(When the grille is opened)

Remote controller

Operation section

Display section

Operation Indicator

Emergency operation switch

Operation indicator lamp

Air inlet

Horizontal vane

Remote control

receiving section

Catechin air filter

Air cleaning filter (option) (White bellows type)

Vertical vanes

Front panel

Remote control

receiving section

1 2 3 4 5 6 7

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

1 7 1 2 2 1 1

MS-A18WVMS-A24WVMS-A30WV-

E1 E1

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TECHNICAL CHANGES

MS-18RV - ➔MS-A18WV -

1. Indoor unit model has changed.

2. Rated voltage has changed. (220V-240V ➜ 230V)

3. Remote controller has changed.

• LONG MODE and WIDE MODE have been added.

4. Indoor fan motor has changed.(RA4V27-EF ➜ RC4V32-AA)

5. Indoor heat exchanger has changed.

6. Diameter of connect pipe has changed.(Liquid:[8 ➜ [6.35)

7. Air filter has changed to catechin air filter.

MS-24RV - ➔MS-A24WV -

1. Indoor unit model has changed.

2. Rated voltage has changed. (220V-240V ➜ 230V)

3. Remote controller has changed.

• LONG MODE and WIDE MODE have been added.

4. Indoor fan motor has changed.(RA4V27-EE ➜ RC4V32-AA)

5. Indoor heat exchanger has changed.

6. Diameter of connect pipe has changed.(Liquid:[8 ➜ [6.35)

7. Air filter has changed to catechin air filter.

MS-30RV - ➔MS-A30WV -

1. Diameter of connect pipe has changed.(Gas:[15.88 ➜ [12)

2. Rated voltage has changed. (220V-240V ➜ 230V)

3. Power supply cord has been added.

4. Air filter has changed to catechin air filter.

2

PART NAMES AND FUNCTIONS

E1E1

INDOOR UNIT

MS-A18WV MS-A24WV MS-A30WV -

ACCESSORIES

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Indoor unit

2

REMOTE CONTROLLER

ON/OFF

TOO

COOL

PM

AM

TOO

WARM

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

WIDE VANE

LONG

I FEEL

COOL

DRY

PM

CLOCK

AM

RESET CLOCK

FAN

Open the front lid.

Signal transmitting section

Operation display section

OPERATE/ STOP

(ON/ OFF)button

TEMPERATURE buttons

OPERATION SELECT button

FAN SPEED CONTROL button

OFF-TIMER button

HR. button

MIN. button

(TIME SET button)

ON-TIMER button

RESET button

ECONO COOL button

VANE button

(Horizontal vane button)

CLOCK SET button

LONG button

WIDE VANE button

(Vertical vane button)

Indication of remote controller model is on back.

MS-A18WV MS-A24WV MS-A30WV -

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3

Indoor model

Function

Power supply

Air flow

(High/Med. /Low ) Power outlet Running current Power input Auxiliary heater Power factor Fan motor current Model Winding resistance(at20:) Dimensions WOHOD Weight Air direction Sound level(High/Med. /Low ) Fan speed(High/Med. /Low ) Fan speed regulator Thermistor RT11(at25:) Thermistor RT12(at25:) Remote controller model

K /h

A A

W

A(kW)

%

A

"

mm

kg

dB

rpm

k" k"

MS-A18WV -

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Cooling

Single phase

230V, 50Hz

768/642 /528

10

0.30 60 — 87

0.30

RC4V32-AA WHT-BLK 293 BLK-RED 146

1,100O325O227

16

5

42/38 /34

1,070/920 /780

3 10 10

KP0B or KG1D

MS-A24WV -

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Cooling

Single phase

230V, 50Hz

768/672 /588

10

0.30 60 — 87

0.30

RC4V32-AA WHT-BLK 293 BLK-RED 146

1,100O325O227

16

5

45/41 /37

1,070/960 /850

3 10 10

KP0B or KG1D

Electrical

data

Fan

motor

Special

remarks

Capacity

ww

w

ww

w

ww

Indoor model

Function

Power supply

Air flow

(High/Med. /Low ) Power outlet Running current Power input Auxiliary heater Power factor Fan motor current Model Winding resistance(at20:) Dimensions WOHOD Weight Air direction Sound level(High/Med. /Low ) Fan speed(High/Med. /Low ) Fan speed regulator Thermistor RT11(at25:) Thermistor RT12(at25:) Thermistor RT13(at25:) Remote controller model

K /h

A A

W

A(kW)

%

A

"

mm

kg

dB

rpm

k" k" k"

MS-A30WV -

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Cooling

Single phase

230V, 50Hz

960/822 /684

10

0.34 69 — 88

0.34

RC4V40-AA WHT-BLK 138.2 BLK-RED 159.0 1,100O325O227

16

5

47/42 /37

1,280/1,130 /970

3 10 10 10

KP0B or KG1D

Electrical

data

Fan

motor

Special

remarks

Capacity

ww

w

ww

w

SPECIFICATION

NOTE: 1. Test conditions are based on JIS C 9612.

Cooling : Indoor DB27°C WB19°C Indoor-Outdoor piping length 5m

2. Remote controller model KP0B and KG1D are the same in terms of specification. w Reference value

Outdoor DB35°C WB(24°C)

4

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

47

SPL(dB(A)) LINE

High

FAN SPEED

NOISE CRITERIA CURVES

MS-A18WV-

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FAN SPEED

High

SPL(dB(A)) LINE

42

Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

90

80

70

60

50

40

30

MS-A24WV-

NC-70

NC-60

NC-50

NC-40

NC-30

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FAN SPEED

High

SPL(dB(A)) LINE

45

Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

90

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

NC-30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

MS-A30WV-

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NC-20

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

INDOORUNIT

WALL

1m

0.8m

MICROPHONE

NC-20

5

162

19

58

47

7.5315

255.547

2.5

98 173

98 173414.5 414.5

5225

253

791

56

1068

1100

325

Air out

Air in

Insulation [ 28

Drain hose [ 16 (Connected part O.D)

{

Liquid line [ 6.35-0.5m Gas line [ 12-0.43m Insulation [ 50 O.D

[ 32 I.D

Installation plate

Wall hole [ 75

Wireless remote controller

Installation plate

Indoor unit

{

Liquid line [ 9.52-0.5m Gas line [ 12-0.43m Insulation [ 50 O.D

[ 32 I.D

for MS-A18/A24WV

for MS-A30WV

Power supply cord Lead to right 2.0m Lead to left 1.0m

OUTLINES AND DIMENSIONS

MS-A18WV MS-A24WV MS-A30WV -

INDOOR UNIT

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Unit: mm

6

WIRING DIAGRAM

MS-A18WV MS-A24WV -

INDOOR UNIT

TO OUTDOOR UNIT CONNECTING

12V

POWER SUPPLY CORD ~/N 230V 50Hz

PE

CIRCUIT BREAKER

SYMBOL

C11

HIC1

NOTES:

INDOOR FAN CAPACITOR

F11

FUSE (3.15A) DC/DC CONVERTER

MF

INDOOR FAN MOTOR (INNER FUSE)

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

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TB

1 2 N

L

BRN BLU

BLK WHT

BLU

BRN

GRN/YLW

NAME

MV2

: Connector

MODELS WIRING DIAGRAM

CN202

1 2

CN201

3 2 1

TAB12

ELECTRONIC CONTROL

CN

151

15

MV2

SYMBOL

MV1

MV1 MV2

NR11

RT11

CN

102

DISPLAY P. C. BOARD

VANE MOTOR (HORIZONTAL) VANE MOTOR (VERTICAL) VARISTOR ROOM TEMPERATURE THERMISTOR

CN 101

P. C. BOARD

33

RECEIVER P. C. BOARD

NAME

HIC1

TRANS

F11

REMOTE CONTROLLER

NR11

C11

SR141

SYMBOL

RT12

SR141

TB

2 1

CN112

CN

121

1 3 4

3

RT12

BLK GRY YLW BRN WHT RED

1 2 3

MF

4 5 6

CN211

CN 111

RT11

NAME INDOOR COIL THERMISTOR SOLID STATE RELAY TERMINAL BLOCK

MS-A30WV -

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MODEL WIRING DIAGRAM

INDOOR UNIT

TO OUTDOOR UNIT CONNECTING

12V

POWER SUPPLY CORD ~/N 230V 50Hz

PE

CIRCUIT BREAKER

TB

3 N L

BRN BLU

RED BLU BRN

MV2

CN 151

MV2

15

MV1

CN201

CN

102

DISPLAY P. C. BOARD

3 2 1

TAB12

ELECTRONIC CONTROL

CN 101

P. C. BOARD

33

RECEIVER P. C. BOARD

GRN/YLW

SYMBOL

C11 F11

HIC1

MF

MV1

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

INDOOR FAN CAPACITOR FUSE(3.15A) DC/DC CONVERTER INDOOR FAN MOTOR(INNER PROTECTOR) VANE MOTOR(HORIZONTAL)

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

3. Symbols below indicate.

/: Terminal block, : Connector

NAME

SYMBOL

MV2

NR11

RT11 RT12 RT13

NAME NAME VANE MOTOR(VERTICAL) VARISTOR ROOM TEMPERATURE THERMIST OR INDOOR COIL THERMISTOR (MAIN) INDOOR COIL THERMISTOR (SUB)

7

HIC1

TRANS

F11

NR11

C11

SR141

REMOTE CONTROLLER

SYMBOL

SR141

TB

4 3 2 1

CN112

CN

121

1 3 4

3

RT13 RT12

BLK GRY YLW BRN WHT RED

CN211

CN 111

RT11

SOLID STATE RELAY TERMINAL BLOCK

MF

7

REFRIGERANT SYSTEM DIAGRAM

MS-A18WV -

INDOOR UNIT

Indoor heat exchanger

Room temperature thermistor RT11

E1

Indoor coil thermistor RT12

Distributor

Refrigerant pipe [12.7 (with heat insulator)

Flared connection

MS-A24WV -

INDOOR UNIT

Indoor heat exchanger

Room temperature thermistor RT11

E1

Indoor coil thermistor RT12

Distributor

Unit:mm

Refrigerant pipe [15.88 (with heat insulator)

Flared connection

MS-A30WV -

INDOOR UNIT

Indoor heat exchanger

Indoor coil thermistor RT13(sub)

Room temperature thermistor RT11

Strainer

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Indoor coil thermistor RT12(main)

#50

Refrigerant pipe[6.35 (with heat insulator)

Refrigerant pipe [15.88 (with heat insulator)

Flared connection

Refrigerant pipe [6.35 (with heat insulator)

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant flow in cooling

8

MICROPROCESSOR CONTROL

MS-A18WV - MS-A24WV - MS-A30WV -

WIRELESS REMOTE CONTROLLER

Signal transmitting section

Operation display section

OPERATE/ STOP

(ON/ OFF)button

VANE button

(Horizontal vane button)

OPERATION SELECT button

ECONO COOL button

WIDE VANE button

(Vertical vane button)

RESET button

ON/OFF

I FEEL

COOL

FAN

DRY

MODE

WIDE VANE

ECONO COOL

TOO

WARM

CLOCK

TOO

WARM

FAN

VANE

LONG

RESET CLOCK

PM

AM

TOO

COOL

PM

AM

TOO

COOL

STOP

START

HR.

MIN.

E1E1E1

TEMPERATURE buttons

FAN SPEED CONTROL button

OFF-TIMER button

ON-TIMER button

HR. button

MIN. button

(TIME SET button)

CLOCK SET button

LONG button

INDOOR UNIT DISPLAY SECTION

Operation Indicator lamp

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

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

Operation Indicator

Operation stateIndication

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

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

lighted not lighted

Difference between target temperature and room temperature

Approx. 2 : or more

Approx. 2 : or less

Once the operation mode are set, the same operation mode can be repeated by simply turning the OPERATE/STOP (ON/OFF) button ON. Indoor unit receives the signal with a beep tone. When the system turns off, 3-minute time delay will operate to protect system from overload and compressor will not restart for 3 minutes.

8-1. “I FEEL CONTROL” ( ) OPERATION

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

controller. 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 room tempera-

ture at start-up of the operation.

Initial room temperature

25: or more

more than 13:,

less than 25:

"I FEEL CONTROL"

Mode

COOL mode of

DRY mode of

9

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

Model

COOL mode of

"I FEEL CONTROL"

DRY mode of

"I FEEL CONTROL"

Initial room temperature Initial set temperature

26: or more

25: to 26:

more than 13:, less than 25:

24:

Initial room temperature minus 2: Initial room temperature minus 2:

❈1

TOO

COOL

TOO

WARM

• Under the ON-TIMER ( ) operation, mode is determined according to the room temperature at the set time the operation starts.

• When the system is stopped on the remote controller, and restarted within 2 hours in “I FEEL CONTROL” ( ) mode, the system operates in previous mode automatically regardless of the room temperature.

Operation timer chart Example

Previous operation

COOL mode of “I FEEL CONTROL”

Restart

COOL mode of “I FEEL CONTROL”

or COOL mode

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 timer chart Example

Previous operation

COOL mode of “I FEEL CONTROL”

or COOL mode

Restart

COOL or DRY mode of “I FEEL CONTROL” that determined by room temperature at start-up of the operation.

(4) The initial set temperature is decided by the initial room temperature.

❈1 When the system is restarted with the remote controller, the system operates with the previous set temperature regard-

less of room temperature at restart. The set temperature is calculated by the previous set temperature.

(5) TEMPERATURE buttons

In “I FEEL CONTROL” ( ) mode, set temperature is decided by the microprocessor based on the room temperature. In addition, set temperature can be controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm. Each time the TOO WARM or TOO COOL button is pressed, the indoor unit receives the signal and emits a beep tone.

• Fuzzy control

When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, considering the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user’s preference to heat or cool. So this is called “Fuzzy control”, and works only in “I FEEL CONTROL” mode. In DRY mode of “I FEEL CONTROL”, the set temperature doesn’t change.

…

To raise the set temperature 1~2 degrees(°C)

To lower the set temperature 1~2 degrees(°C)

10