Mitsubishi Electric MS-A18WV User manual

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)
E1
E1
E1
No. OB325
SPLIT-TYPE, AIR CONDITIONERS
MS-A18WV -
MS-A24WV -
MS-A30WV - E1
E1
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

TECHNICAL CHANGES
2
1
PART NAMES AND FUNCTIONS
2
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
E1
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
E1E1
E1E1
ACCESSORIES
Indoor unit
1
2
3
4
5
6
7
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)
1
7
1
2
2
1
1
MS-A18WV-
MS-A24WV-
MS-A30WV-
E1
E1
E1
OB325-1.qxp 03.12.3 1:03 PM Page 2

REMOTE CONTROLLER
MS-A18WV -
MS-A24WV -
MS-A30WV - E1
E1
E1
3
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.
OB325-1.qxp 03.12.3 1:03 PM Page 3

SPECIFICATION
4
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 - E1
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 - E1
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
ww
ww
ww
ww
ww
ww
ww
ww
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
A
W
A(kW)
%
A
"
mm
kg
dB
rpm
k"
k"
k"
MS-A30WV - E1
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
ww
ww
ww
ww
ww
OB325-1.qxp 03.12.3 1:03 PM Page 4

5
NOISE CRITERIA CURVES
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
MS-A30WV- E1
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
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
42
SPL(dB(A)) LINE
High
FAN SPEED
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
45
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
1m
OB325-1.qxp 03.12.3 1:03 PM Page 5