Mitsubishi MCF-A12WV-E1, MCF-A18WV-E1, MCF-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
E1
(WH)
(WH)
MCF-A12WV MCF-A18WV -
Revision A:
● Power input of SPECIFICATION has modified.
● Model name of remote controller has been
corrected.
Please void OB338.
No. OB338
REVISED EDITION-A
MCF-A24WV -
Indication of
model name
MCF-A12WV MCF-A18WV MCF-A24WV -
E1
(WH)
E1
E1
E1
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 ············································6
7. REFRIGERANT SYSTEM DIAGRAM················7
8. SERVICE FUNCTIONS ······································8
9. TROUBLESHOOTING······································10
10. DISASSEMBLY INSTRUCTIONS·····················15
11. PARTS LIST······················································17
12. OPTIONAL PARTS ···········································19
NOTE:
• This service manual describes technical data of indoor units
• As for outdoor units MUCF-A18WV - and MUCF-A24WV - , refer to the service manual OB339.
• As for outdoor unit MU-A12YV - , refer to the service manual OB330 REVISED EDITION-A.
E1
E1E1
(When installed on the floor)
(When the air inlet grille is opened.)
Deodorizing filter
(Gray sponge type)(option)
Air filter
Remote controller
Air inlet
Operation section
Air cleaning filter
(White bellows type)(option)
Front panel
Receiving section
Operation indicator lamp
Horizontal vane
Vertical vanes
Emergency
operation switch
(When installed on the ceiling)
ACCESSORIES
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
Revision A:
•Power input of SPECIFICATION has modified.
•Model name of remote controller has been corrected.
SPECIFICATION, SERVICE FUNCTION and PARTS LIST have modified.
1
MCF-13NV - ➔ MCF-A12WV -
1. Rated voltage has changed. (220-240V ➔ 230V)
2. Indoor electronic control P.C. board has changed.
3. Horizontal vane has changed.
4. Terminal block has changed.
5. Indoor heat exchanger has changed.
6. Remote controller has changed.
Econo cool operation has been added.
7. Indoor fan motor has changed. (RB4V19-AB ➔ RB4V19-AC)
MCF-24NV - ➔ MCF-A24WV -
1. Rated voltage has changed. (220-240V ➔ 230V)
2. Indoor electronic control P.C. board has changed.
3. Horizontal vane has changed.
4. Terminal block has changed.
5. Indoor heat exchanger has changed.
6. Remote controller has changed.
Econo cool operation has been added.
7. Diameter of union has changed. (Liquid: {9.52 ➔ {6.35)
8. Indoor fan motor has changed. (RB4V36-AB ➔ RB4V36-DB)
2
TECHNICAL CHANGES
E1E4
E1E3
PART NAMES AND FUNCTIONS
MCF-18NV - ➔ MCF-A18WV -
1. Rated voltage has changed. (220-240V ➔ 230V)
2. Indoor electronic control P.C. board has changed.
3. Horizontal vane has changed.
4. Terminal block has changed.
5. Indoor heat exchanger has changed.
6. Remote controller has changed.
Econo cool operation has been added.
7. Diameter of union has changed. (Gas: {15.88 ➔ {12.7)
8. Indoor fan motor has changed. (RB4V25-AB ➔ RB4V25-AC)
E1E3
MCF-A12WV - MCF-A18WV - MCF-A24WV -
INDOOR UNIT
E1E1E1
2
MCF-A12WV - MCF-A18WV - MCF-A24WV -
REMOTE CONTROLLER
Signal transmitting section
E1E1E1
Operation display section
OPERATE /STOP
(ON /OFF)button
Open the front lid.
ON/OFF
ON/OFF
TOO
WARM
CLOCK
TOO
WARM
PM
AM
TOO
COOL
PM
AM
TOO
COOL
TEMPERATURE buttons
Indication of remote controller model
is on back.
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
RESET button
FAN
I FEEL
COOL
VANE
DRY
FAN
MODE
ECONO COOL
RESET
CLOCK
STOP
START
HR.
MIN.
OFF-TIMER button
ON-TIMER button
HR. button
MIN. button
(TIME SET button)
CLOCK SET button
VANE CONTROL button
3
3
Indoor model
Function
Power supply
Air flow
(High/Med.W/LowW)
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Fan motor current
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"
MCF-A18WV -
E1
Cooling
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
1,100O650O180
25
5
46 /41W / 36W
1,240 /1,060W / 845W
3
10
10
KG04D
MCF-A24WV -
E1
Cooling
Single phase
230V, 50Hz
840/ 744W / 642W
0.36
80
97
0.36
RB4V36-DB
WHT-BLK 84 BLK-YLW 46.2
YLW-BLU 37.2 BLU-BRN 45.2
BRN-RED 13.6
48 /45W / 42W
1,320 /1,190W / 1,060W
Electrical
data
Fan
motor
Special
remarks
Capacity
MCF-A12WV -
E1
Cooling
Single phase
230V, 50Hz
678 /582W /474 W
0.26
56
94
0.26
RB4V19-AC
WHT-BLK 203.2 BLK-YLW 45.9
YLW-BLU 32.7 BLU-BRN 44.4
BRN-RED 23.3
44 /40W /34W
1,105 /970W / 820W
SPECIFICATION
NOTE:Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB(24°C)
Indoor-Outdoor piping length : 5m
W Reference value
4
4
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
High
46
SPL(dB
(A)) LINE
FAN SPEED
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
High
44
SPL(dB
(A)) LINE
FAN SPEED
NOISE CRITERIA CURVES
NOISE CRITERIA CURVES
MCF-A12WV -
E1
MCF-A18WV -
E1
MCF-A24WV -
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
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
E1
FAN SPEED
High
BAND CENTER FREQUENCIES, Hz
SPL(dB
48
(A)) LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
INDOOR UNIT
MICROPHONE
1m
1m
WALL
5
5
(When installed on the floor)
(When installed on the ceiling)
500mm or more
500mm or more
500mm or more
500mm or more
1000mm or more
650
616.5
80.8 906 112.8
114
16
1100
93
77
113
143
180
17042.5
[
12.7 (MCF-A12/A18WV)
[
15.88 (MCF-A24WV)
Gas line
[
6.35
Liquid line
Wireless remote controller
162
19
58
OUTLINES AND DIMENSIONS
MCF-A12WV - MCF-A24WV MCF-A18WV -
E1
INDOOR UNIT
E1E1
Unit: mm
WIRING DIAGRAM6
MCF-A12WV - MCF-A18WV - MCF-A24WV -
INDOOR UNIT
TB1
PE
POWER
SUPPLY
N
~/N 230V
50Hz
TO
OUTDOOR
UNIT
CONNECTING
CIRCUIT BREAKER
L
1
2
12V
REMOTE
CONTROLLER
SYMBOL SYMBOL
C11
F11
HIC1
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)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER FUSE)
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate;
: Terminal block, : Connector
GRN/YLW
TB2
MODELS WIRING DIAGRAM
BLU
BRN
BLK
WHT
DISP/
RECEIVER
P.C.BOARD
NR11
1
2
3
CN201
TAB12
CN202
1
2
CN
101CN113CN151
5
4
5
SW/THERMO
P.C.BOARD
ELECTRONIC CONTROL P.C BOARD
6
5
MV
RT11
NAME NAME
MV
VANE MOTOR
VARISTOR
RT11
RT12
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
6
HIC1
TRANS
F11
E1E1E1
NR11
CN
112
LDCOM
LDC11
C11
LDC12
LDFH
X144
LDFM
SR143
LDFL
SR142
SYMBOLNAME
SR142~SR143
TB1, TB2
X144
SOLID STATE RELAY
TERMINAL BLOCK
RELAY
22
WHT
ORN
RED
BLK
YLW
BLU
RT12
WHT
1
ORN
2
RED
3
BLK
4
YLW
5
BLU
6
BRN
7
8
GRN/YLW
MF
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