Mitsubishi MCFZ-A12WV-E1, MCFZ-A18WV-E1, MCFZ-A24WV-E1 Service Manual

SERVICE MANUAL

(When installed on the ceiling)

(When installed on the floor)

FLOOR AND CEILING TYPE AIR CONDITIONERS

Wireless type Models

E1

(WH) (WH)

MCFZ-A12WV MCFZ-A18WV -

Revision A:

● MCFZ-A18WV- and MCFZ-A24WVhave been added.

Please void OB344.

No. OB344

REVISED EDITION-A

E1E1

MCFZ-A24WV -

E1

Indication of model name

MCFZ-A12WV MCFZ-A18WV MCFZ-A24WV -

(WH)

CONTENTS

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

2. SPECIFICATION·················································4

3. NOISE CRITERIA CURVES·······························5

E1 E1 E1

4. OUTLINES AND DIMENSIONS·························6

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

6. REFRIGERANT SYSTEM DIAGRAM················8

7. SERVICE FUNCTIONS ······································8

8. TROUBLESHOOTING······································10

9. DISASSEMBLY INSTRUCTIONS ····················19

10. PARTS LIST······················································21

11. OPTIONAL PARTS···········································23

NOTE:

• This service manual describes technical data of indoor units.

• As for outdoor units MUZ-A12YV - and MUZ-A12YVH - , refer to the service manual OB328 REVISED EDITION-A.

• As for outdoor units MUZ-A18YV - and MUZ-A24YV - , refer to the service manual OB346 REVISED EDITION-A.

E1E1

1

(When installed on the floor)

(When the air inlet grille is opened.)

Deodorizing filter (Gray sponge type)(option)

Air filter

Air inlet

Operation section

Air cleaning filter (White bellows type)(option)

Front panel

Remote control receiving section

Operation indicator lamp

Horizontal vane

Vertical vanes

Emergency operation switch

(When installed on the ceiling)

Item

Installation plate Unit fixing screw 5 o 12mm Wireless remote controller Remote controller holder Fixing screw for

3.5 o 16mm (Black) Battery (AAA) for remote controller

Drain hose Drain pipe cover

Knockout cover Screw for 4 o 10mm

2 2

1 1 2 2

1 1 1 2

Q'ty

Remote controller

ON/OFF

FAN

TOO

WARM

TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

AMPM

CLOCK

˚C

AM

RESET CLOCK

I FEEL

COOL

DRY

AUTO

HEAT

ON/OFF

TOO

COOL

PM

AM

TOO

WARM

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 CONTROL button

CLOCK SET button

Indication of remote controller model is on back.

PART NAMES AND FUNCTIONS

MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV -

INDOOR UNIT

MCFZ-A12WV -

E1

ACCESSORIES

E1E1E1

REMOTE CONTROLLER

2

MCFZ-A18WV - MCFZ-A24WV -

REMOTE CONTROLLER

Signal transmitting section

E1E1

Operation display section

OPERATE/ STOP

(ON/ OFF)button

Open the front lid.

VANE CONTROL button

OPERATION SELECT button

ECONO COOL button

RESET button

ON/OFF

I FEEL

COOL

VANE

HEAT

DRY

MODE

ECONO COOL

RESET CLOCK

TOO

WARM

CLOCK

TOO

WARM

FAN

PM

AM

TOO

COOL

PM

AM

TOO

COOL

STOP

START

HR.

MIN.

TEMPERATURE buttons

Indication of remote controller model is on back.

FAN SPEED CONTROL button

OFF-TIMER button

ON-TIMER button

HR. button

MIN. button

(TIME SET button)

CLOCK SET button

3

2

Indoor model

Function

Power supply

Air flow(High/Med.W/LowW) Power outlet Running current

✽1

Power input ✽1 Auxiliary heater Power factor

✽1

Fan motor current

✽1

Model Winding

resistance(at 20:) Dimensions WOHOD

Weight Air direction Sound level

(High/Med.W/LowW)

Fan speed

(High/Med.W/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"

Electrical

data

Fan

motor

Special

remarks

Capacity

MCFZ-A18WV -

E1

Cooling

—

Heating

—

Cooling

—

Heating

—

Cooling

—

Heating

—

Single phase

230V, 50Hz

840/696W/570W

10

0.36 80

97

0.36

RB4V36-AC WHT-BLK 82.9 BLK-YLW 65.6 YLW-BLU 36.0 BLU-BRN 27.0

BRN-RED 13.7

1,100 O 650 O 180

25

5

48/44W/39

W

1,320/1,145/960

3 10 10

KG04C

MCFZ-A24WV -

E1

Single phase

230V, 50Hz

840/744W/642W

10

0.36 80

97

0.36

RB4V36-DB WHT-BLK 84.0 BLK-YLW 46.2 YLW-BLU 37.2 BLU-BRN 45.2

BRN-RED 13.6

1,100 O 650 O 180

25

5

48/45W/42

W

1,320/1,190/1,060

3 10 10

KG04C

MCFZ-A12WV -

E1

Single phase

230V, 50Hz

780/636W/492W

10

0.30 66

96

0.30

RB4V25-AC

WHT-BLK 182.2 BLK-YLW 68.9

YLW-BLU 47.5 BLU-BRN 31.5

BRN-RED 22.9

1,100 O 650 O 180

25

5

46/41W/35

W

1,240/1,060W/845

W

3 10 10

KG04B

1.8+ 440V 250V 3.15A

MP20 12V 250"

ERZV10D471/ TNR10V471K410

AQG12212/ G3MC-201PL

3P/ 4P

G5NB-1A-DC12V/ G5N-1A-DC12V

145 i 2:

INDOOR UNIT

Item

Model

Indoor fan capacitor Fuse Vane motor Varistor Solid state relay Terminal block Relay Compressor contactor Indoor fan motor thermal fuse

MCFZ-A18WV -

E1

MCFZ-A12WV -

E1

MCFZ-A24WV -

E1

(C11)

(F11)

(MV)

(NR11)

(SR141~SR143)

(TB1/TB2)

(X144)

(52C)

ALF1T12

–

SPECIFICATION

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)

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

Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C

Indoor-Outdoor piping length (one way) : 5 m w Reference value ✽1 Measured under rated operating frequency.

Specifications and rating conditions of main electric parts

4

3

NOISE CRITERIA CURVES

MCFZ-A12WV -

E1

SPEED

High

SPL(dB

46

(A)) LINE

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

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

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MCFZ-A18WV -

E1

(A)) LINE

SPEED

High

SPL(dB

48

Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:\  Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MCFZ-A24WV -

E1

(A)) LINE

SPEED

High

SPL(dB

48

Test conditions,

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

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

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

INDOOR UNIT

MICROPHONE

1m

WALL

5

4

(When installed on the floor)

(When installed on the ceiling)

500mm or more

1000mm or more

650

616.5

80.8 906 112.8

114

16

1100

93

77

113

143

180

17042.5

9.52(MCFZ-A12WV)

12.7(MCFZ-A18WV)

15.88(MCFZ-A24WV)

Gas line

6.35

Liquid line

Wireless remote controller

162

19

58

OUTLINES AND DIMENSIONS

MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV -

INDOOR UNIT

E1E1E1

Unit: mm

MCFZ-A12WV -

INDOOR UNIT

POWER SUPPLY ~/N 230V 50Hz

TO OUTDOOR UNIT CONNECTING

SYMBOL

C11 F11

HIC1

MF

NOTES:

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

WIRING DIAGRAM5

E1

TB1

PE

CIRCUIT BREAKER

230V~

12V

NAME INDOOR FAN CAPACITOR FUSE (3.15A) DC/DC CONVERTER INDOOR FAN MOTOR(INNER FUSE)

GRN/YLW

L

BLU

N

TB2

2

WHT

N

BLU

3

RED GRN/YLW

REMOTE CONTROLLER

: Connector

MODEL WIRING DIAGRAM

BRN

1 2 3

CN201

CN

CN CN

101

113 151

5

4

5

DISP/ RECEIVER P.C.BOARD

SW/THERMO P.C.BOARD

SYMBOL

MV

NR11

RT11

RT12

VANE MOTOR VARISTOR ROOM TEMPERATURE THERMIST OR INDOOR COIL THERMISTOR

4

52C

3

ELECTRONIC CONTROL P.C BOARD

6 5

MV

NAME NAME

6

RT11

HIC1

F11

C11

NR11

X144 SR143 SR142 SR141

SYMBOL

SR141~SR143

TB1, TB2

X144

52C

2

WHT ORN RED BLK YLW BLU BRN

RT12

WHT

1

ORN

2

RED

3

BLK

4

YLW

5

BLU

6

BRN

7 8

GRN/YLW

CN

112

LDCOM LDC11 LDC12 LDFH

LDFM LDFL LDFVL

SOLID STATE RELAY TERMINAL BLOCK RELAY COMPRESSOR CONTACTOR

MF

SYMBOL

SR141~SR143

TB1, TB2

X144

SYMBOL

MV NR11 RT11 RT12

NAME

NAME NAME INDOOR FAN CAPACITOR FUSE (3.15A) DC/DC CONVERTER INDOOR FAN MOTOR(INNER FUSE)

VANE MOTOR VARISTOR ROOM TEMPERATURE THERMIST OR INDOOR COIL THERMISTOR

SOLID STATE RELAY TERMINAL BLOCK RELAY

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

MF

MCFZ-A18WV MCFZ-A24WV -

E1

MODELS WIRING DIAGRAM

E1

INDOOR UNIT

POWER SUPPLY

~/N 230V

50Hz

CIRCUIT BREAKER

TO OUTDOOR UNIT CONNECTING 12V

PE

TB1

GRN/YLW

N

L

TB2

N

3

REMOTE CONTROLLER

BLU

BLU RED

BRN

DISP/ RECEIVER P.C.BOARD

1 2 3

CN201

CN CN CN

113 151101

5

4

MV

5

SW/THERMO P.C.BOARD

HIC1

TAB12

F11

ELECTRONIC CONTROL P.C BOARD

6 5

RT11

C11

NR11

X144 SR143

SR142 SR141

CN

112

LDCOM

LDC11 LDC12 LDFH LDFM LDFL LDFVL

2

WHT ORN RED BLK YLW BLU BRN

WHT

1

ORN

2

RED

3

BLK

4

YLW

5

BLU

6

BRN

7 8

GRN/YLW

RT12

MF

7

REFRIGERANT SYSTEM DIAGRAM6

Indoor heat exchanger

Flared connection

Room temperature thermistor RT11

Indoor coil thermistor RT12

Flared connection

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

Muffler

Indoor heat exchanger

Distributor

Flared connection

Room temperature thermistor RT11

Indoor coil thermistor RT12

Flared connection

Refrigerant pipe [12.7(MCFZ-A18MV) Refrigerant pipe [15.88(MCFZ-A24MV) (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

MCFZ-A12WV-

INDOOR UNIT

E1

MCFZ-A18WVMCFZ-A24WV-

E1

Unit : mm

INDOOR UNIT

Refrigerant flow in cooling Refrigerant flow in heating

SERVICE FUNCTIONS7

MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV -

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 page 17 or 18.)

3-minutes time delay : 3-minutes → 3-seconds 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 : KG04B(MCFZ-A12WV),KG04C(MCFZ-A18/A24WV)

J2

E1E1E1

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.

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.

J1

8