Mitsubishi Electric MS-A18WV-E1 WH Manuale utente

SERVICE MANUAL

CONTENTS

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

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

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

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

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

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

Wireless type

Models

MS-A18WV - (WH)

MS-A24WV - (WH)

MS-A30WV - (WH)

No. OB325

SPLIT-TYPE, AIR CONDITIONERS

MS-A18WV -

MS-A24WV -

MS-A30WV - E1

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. E1E1E1

Indication of model name

OB325-1.qxp 03.12.3 1:03 PM Page 1

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TECHNICAL CHANGES

PART NAMES AND FUNCTIONS

INDOOR UNIT

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

MS-A18WV -

MS-A24WV -

MS-A30WV - E1

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.

E1E1

ACCESSORIES

Indoor unit

Installation plate

Installation plate fixing screw 4 o25 mm

Remote controller holder

Fixing screw for 3o3.5 o1.6 mm (Black)

Battery (AAA) for remote controller

Wireless remote controller

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

MS-A18WV-

MS-A24WV-

MS-A30WV-

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REMOTE CONTROLLER

MS-A18WV -

MS-A24WV -

MS-A30WV - E1

ON/OFF

TOO

COOL

TOO

WARM

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

WIDE VANE

LONG

I FEEL

COOL

DRY

CLOCK

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.

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SPECIFICATION

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(kW)

rpm

MS-A18WV - E1

Cooling

Single phase

230V, 50Hz

768/642 /528

0.30

—

0.30

RC4V32-AA

WHT-BLK 293

BLK-RED 146

1,100O325O227

42/38 /34

1,070/920 /780

KP0B or KG1D

MS-A24WV - E1

Cooling

Single phase

230V, 50Hz

768/672 /588

0.30

—

0.30

RC4V32-AA

WHT-BLK 293

BLK-RED 146

1,100O325O227

45/41 /37

1,070/960 /850

KP0B or KG1D

Electrical

data

Fan

motor

Special

remarks

Capacity

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

Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB(24°C)

Indoor-Outdoor piping length 5m

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

wReference value

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(kW)

rpm

MS-A30WV - E1

Cooling

Single phase

230V, 50Hz

960/822 /684

0.34

—

0.34

RC4V40-AA

WHT-BLK 138.2

BLK-RED 159.0

1,100O325O227

47/42 /37

1,280/1,130 /970

KP0B or KG1D

Electrical

data

Fan

motor

Special

remarks

Capacity

OB325-1.qxp 03.12.3 1:03 PM Page 4

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NOISE CRITERIA CURVES

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:

SPL(dB(A)) LINE

High

FAN SPEED

MS-A30WV- E1

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

Test conditions,

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

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

SPL(dB(A)) LINE

High

FAN SPEED

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

Test conditions,

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

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

SPL(dB(A)) LINE

High

FAN SPEED

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

MS-A18WV- E1 MS-A24WV- E1

INDOORUNIT WALL

MICROPHONE

0.8m

OB325-1.qxp 03.12.3 1:03 PM Page 5

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OUTLINES AND DIMENSIONS

162

7.5315

255.547

2.5

98 173

98 173414.5 414.5

5225

253

791

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

INDOOR UNIT

MS-A18WV -

MS-A24WV -

MS-A30WV - E1

E1 Unit: mm

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MODELS WIRING DIAGRAM

MODEL WIRING DIAGRAM

WIRING DIAGRAM

MS-A18WV -

MS-A24WV - E1

INDOOR UNIT

12V BLK

GRY

YLW

BRN

WHT

RED

SR141 4

121

C11

HIC1

TRANS

MV1

CN112

151

MV2

RT12

RT11

111

CN211

NR11

ELECTRONIC CONTROL

P. C. BOARD

F11

LBRN

CN201

MV2

101

102

DISPLAY

P. C. BOARD RECEIVER

P. C. BOARD

REMOTE

CONTROLLER

TAB12

GRN/YLW

TB 2

CN202

TO OUTDOOR UNIT

CONNECTING BLK

WHT

BLU

BRN

BLU

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. : Connector

: Terminal block

NOTES:

SYMBOL

C11

F11

HIC1

NAME

INDOOR FAN CAPACITOR

FUSE (3.15A)

DC/DC CONVERTER

INDOOR FAN MOTOR (INNER FUSE)

SYMBOL

MV1

MV2

NR11

RT11

NAME

VANE MOTOR (HORIZONTAL)

VANE MOTOR (VERTICAL)

VARISTOR

ROOM TEMPERATURE THERMISTOR

SYMBOL

RT12

SR141

NAME

INDOOR COIL THERMISTOR

SOLID STATE RELAY

TERMINAL BLOCK

PE CIRCUIT

BREAKER

POWER

SUPPLY

CORD

~/N 230V

50Hz

INDOOR UNIT

12V

TO OUTDOOR

UNIT

CONNECTING

BRN

BLU

GRN/YLW

BLK

GRY

YLW

BRN

WHT

RED

SR141 4

121

C11

HIC1

TRANS

MV1

RT13

CN112

151

MV2

RT12

RT11

111

CN211

NR11

ELECTRONIC CONTROL

P. C. BOARD

F11

LBRN

CN201

MV2

BLU

RED

101

102

DISPLAY

P. C. BOARD RECEIVER

P. C. BOARD

REMOTE

CONTROLLER

TAB12

PE CIRCUIT

BREAKER

POWER

SUPPLY

CORD

~/N 230V

50Hz

SYMBOL

SR141

SYMBOL

MV2

NR11

RT11

RT12

RT13

SYMBOL

C11

F11

HIC1

MV1

NAME NAME NAME

INDOOR FAN CAPACITOR

FUSE(3.15A)

DC/DC CONVERTER

INDOOR FAN MOTOR(INNER PROTECTOR)

VANE MOTOR(HORIZONTAL)

VANE MOTOR(VERTICAL)

VARISTOR

ROOM TEMPERATURE THERMISTOR

INDOOR COIL THERMISTOR (MAIN)

INDOOR COIL THERMISTOR (SUB)

SOLID STATE RELAY

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

MS-A30WV - E1

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REFRIGERANT SYSTEM DIAGRAM

MS-A30WV - E1

INDOOR UNIT

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Indoor coil

thermistor

RT13(sub)

Flared connection

Refrigerant pipe [15.88

(with heat insulator)

Refrigerant pipe [9.52

(with heat insulator)

Indoor coil

thermistor

RT12(main)

Strainer

#50

Refrigerant flow in cooling

MS-A18WV - E1

INDOOR UNIT

Indoor

heat

exchanger

Room temperature

thermistor

RT11

Refrigerant pipe [12.7

(with heat insulator)

Flared connection

Indoor coil

thermistor

RT12

Refrigerant pipe[6.35

(with heat insulator)

Distributor

MS-A24WV - E1

INDOOR UNIT

Indoor

heat

exchanger

Room temperature

thermistor

RT11

Refrigerant pipe [15.88

(with heat insulator)

Flared connection

Indoor coil

thermistor

RT12

Refrigerant pipe [6.35

(with heat insulator)

Distributor

Unit:mm

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MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER

Mode

COOL mode of

"I FEEL CONTROL"

DRY mode of

"I FEEL CONTROL"

Initial room temperature

25:or more

more than 13:,

less than 25:

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.

MS-A18WV - MS-A24WV - MS-A30WV - E1E1E1

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

WIDE VANE

LONG

I FEEL

COOL

DRY

CLOCK

RESET CLOCK

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)

ON/OFF

TOO

COOL

TOO

WARM

FAN

Signal transmitting section

Operation display section

OPERATE/ STOP

(ON/ OFF)button

TEMPERATURE buttons

lighted

not lighted

Approx. 2 :

or more

Difference

between target

temperature

and room

temperature

Approx. 2 :

or less

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.

Operation stateIndication

Operation Indicator

Operation Indicator lamp

The operation indicator at the right side of the indoor

unit indicates the operation state.

INDOOR UNIT DISPLAY SECTION

• The following indication applies regardless of

shape of the indicator.

OB325-1.qxp 03.12.3 1:03 PM Page 9

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Previous operation

COOL mode of

“I FEEL CONTROL”

or COOL mode

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

• 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.

Previous operation

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.

Restart

COOL mode of

“I FEEL CONTROL”

Restart

COOL or DRY mode

of “I FEEL CONTROL”

that determined by

room temperature at

start-up of the opera-

tion.

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

(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)

TOO

COOL

TOO

WARM

Operation timer chart

Example

Operation timer chart

Example

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