Mitsubishi MSH-18RV User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································6
4. NOISE CRITERIA CURVES·······························8
5. OUTLINES AND DIMENSIONS ······················ 10
6. WIRING DIAGRAM ··········································13
7. REFRIGERANT SYSTEM DIAGRAM··············17
8. PERFORMANCE CURVES······························20
9. MICROPROCESSOR CONTROL ····················36
10. SERVICE FUNCTIONS·····································50
11. TROUBLESHOOTING······································52
12. DISASSEMBLY INSTRUCTIONS·····················71
13. PARTS LIST······················································79
14. OPTIONAL PARTS···········································88
Wireless type
Models
MSH-18RV - (WH) · MUH-18RV -
· MUH-18RV -
MSH-24RV - (WH) · MUH-24RV -
MSH-30RV - (WH) · MUH-30RV - E1E1
E1E1
E2
E1E1
No. OB272
REVISED EDITION-A
SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS
MSH-18RV -
MSH-24RV - E1
E1
Revision:
●MUH-18RV- has been added.
MUH-18RV- ➔MUH-18RV-
•Path of outdoor heat exchanger has changed.
E2E1
E2
•Refer to the Service Manual OB185 REVISED EDITION C when MSH-18RV- is connected
with MXZ-32NV- or MXZ-32NV- as multi system units.
•Refer to the Service Manual OB227 REVISED EDITION-B when MSH-18RV- is connected
with MXZ-32RV- as multi system units.
•Refer to the Service Manual OB254 when MSH-18RV- is connected with MXZ-32SV- as
multi system units. E1E1
E1
E1
E2E1
E1
OB272-1.qxp 02.1.26 1:22 PM Page 1

2
PART NAMES AND FUNCTIONS
2
INDOOR UNIT




,

(When the grille is opened)
Front panel
Air filter
MSH-18RV-
MSH-24RV-
Grille
Air inlet
Horizontal vane
Remote controller
Remote control
receiving section
Vertical vanes
Operation section
Emergency operation switch
Display section
Operation indicator lamp
Receiving section
Air cleaning filter (option)
(White bellows type)
Deodrizing filter (option)
(Gray sponge type)
E1
MSH-30RV- E1 MSH-30RV- E1
E1
MSH-18RV-
MSH-24RV- E1
E1
Operation Indicator
Emergency operation switch
Operation indicator lamp
Receiving section
MSH-18RV -
MSH-24RV - E1
E1 MSH-30RV - E1
TECHNICAL CHANGES
MSH-18NV - ➔MSH-18RV -
MSH-24NV - ➔MSH-24RV -
1. Remote controller has changed.
• SLEEP MODE function has removed.
• ECONO COOL operation has added.
• SWING button is removed, but SWING MODE function is available by VANE CONTROL button.
MSH-30RV -
New model
MUH-18NV - ➔MUH-18RV -
1. Outdoor model name has changed.
MUH-18RV - ➔MUH-18RV -
1. Path of outdoor heat exchanger has changed.
MUH-24NV - ➔MUH-24RV -
1. Outdoor deicer P.C. board has changed.
2. Ball valve has changed to stop valve.
3. Thermostat has changed to ambient temperature thermistor.
MUH-30RV -
New model
E1
E1E2
E2E1
E1E4
E1
E1E2
E1E4
1
OB272-1.qxp 02.1.26 1:22 PM Page 2

3
Drainage hose
Piping
Air inlet
Air inlet
Air outlet
Air outlet
Drain outlet
(back and side)
OUTDOOR UNIT
ACCESSORIES
MUH-18RV -
MUH-18RV - E2
E1
Indoor unit
MUH-24RV -
MUH-30RV - E1
E1
1
2
3
4
5
6
7
Installation plate
Installation plate fixing screw 4 o25 mm
Remote controller mouting hardware
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
1
6
1
2
2
1
1
MSH-18RV-
MSH-24RV- E1 MSH-30RV- E1
E1
Outdoor unit
8
9
Drain socket
Drain cap {33
Drain cap {16
1
6
—
1
2
1
MUH-18RV-
MUH-18RV- E1 MUH-24RV-
MUH-30RV- E1
E1
E2
OB272-1.qxp 02.1.26 1:49 PM Page 3

4
REMOTE CONTROLLER
MSH-18RV -
MSH-24RV - E1
E1
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
ECONO COOL
STOP
START
HR.
MIN.
I FEEL COOL
HEAT
DRY
PM
CLOCK
AM
RESET CLOCK
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
OB272-1.qxp 02.1.26 1:22 PM Page 4

5
REMOTE CONTROLLER
MSH-30RV - E1
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
HEAT
DRY
PM
CLOCK
AM
RESET CLOCK
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)
OB272-1.qxp 02.1.26 1:22 PM Page 5

SPECIFICATION
6
3
Indoor model
Function
Power supply
Capacity
Dehumidification
Air flow
(High/Med. /Low )
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
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:)
Outdoor model
Air flow(High/Low )
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level(High)
Fan speed(High/Low )
Fan speed regulator
Refrigerant filling
capacity(R22)
Refrigerating oil (Model)
Thermistor RT61(at0:)
Thermistor RT63(at0:)
kW
r/h
K/h
A
A
W
A(kW)
%
A
A
"
mm
kg
dB
rpm
k"
k"
K/h
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
k"
k"
MSH-18RV - E1
Single phase
220-240V, 50Hz
756/654 /546
15
—
98-96
52-58
0.25
RA4V27-EF
WHT-BLK 183.8
BLK-RED 250.5
1,015O320O190
14
5
42/39 /34
1,180/1,040 /900
3
10
10
MUH-18RV - E1 E2
High:2,142-2,244
0.39
PH-36VPET
1,600
C-R 1.03
C-S 2.04
RA6V50-OG
WHT-BLK 116.4
BLK-RED 111.0
850o605o290
54
52
High:810-845
1
1.65
900 (MS32N1)
33.18
—
Cooling
5.1
2.5
9.4-9.2
2,030-2,120
2.51-2.41
8.76-8.56
Heating
5.4
—
9.2-9.0
1,980-2,070
2.73-2.61
8.56-8.36
MSH-24RV - E1
Single phase
220-240V, 50Hz
816/726 /630
25
—
98
59
0.29
RA4V27-EE
WHT-BLK 183.3
BLK-RED 250.5
1,015O320O190
14
5
45/42 /38
1,260/1,140 /1,020
3
10
10
MUH-24RV - E1
2,640-2,760/2,100-2,250
0.58
NH-47VMDT
2,200
C-R 0.96
C-S 2.07
RA6V85-AA
WHT-BLK 62.7 BLK-YLW 30.2
YLW-RED 62.9
870o850o295
72
53
720-750/570-610
2
2.40
1,200 (MS32N1)
33.18
33.18
Cooling
6.0
3.1
12.6-11.7
2,720-2,750
2.21-2.18
11.73-10.83
Heating
6.2
—
11.5-11.0
2,470-2,580
2.51-2.40
10.63-10.13
Electrical data
Fan motor
Special remarks
Compressor
Electrical data
Fan motor
Special remarks
Capacity
Coefficient of performance(C.O.P)
Capacity
MSH-18RV - E1
Single phase
220-240V, 50Hz
—
—
756/654 /546
10
0.28
60
—
97-89
—
0.25
—
RA4V27-EF
WHT-BLK 183.8
BLK-RED 250.5
1,015O320O190
14
5
42/39 /34
1,180/1,040 /900
3
10
10
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Cooling Heating
w1.
ww
ww
ww
ww
ww
ww
ww
ww
ww ww
ww
ww
ww
w
w
W1.Refer to the Service Manual OB185 REVISED EDITION C when MSH-18RV- is connected with
MXZ-32NV- or MXZ-32NV- as multi system units.
Refer to the Service Manual OB227 REVISED EDITION-B when MSH-18RV- is connected with
MXZ-32RV- as multi system units.
Refer to the Service Manual OB254 when MSH-18RV- is connected with MXZ-32SV- as multi system units.
E1E1
E1
E1
E2E1
E1
NOTE: Test conditions are based on JIS C 9612.
Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C WB 15.5°C
Outdoor DB35°C WB(24°C) Outdoor DB 7°C WB 6°C
Indoor-Outdoor piping length 5m
wReference value
OB272-1.qxp 02.1.26 1:22 PM Page 6

7
Indoor model
Function
Power supply
Capacity
Dehumidification
Air flow
(High/Med. /Low )
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
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:)
Outdoor model
Air flow(High/Low )
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level(High)
Fan speed(High/Low )
Fan speed regulator
Refrigerant filling
capacity(R22)
Refrigerating oil (Model)
Thermistor RT61(at0:)
Thermistor RT62(at25:)
Thermistor RT63(at0:)
kW
R/h
K/h
A
A
W
A(kW)
%
A
A
"
mm
kg
dB
rpm
k"
k"
k"
K/h
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
k"
k"
k"
MSH-30RV - E1
Single phase
220-240V, 50Hz
25
—
82-84
0.33-0.35
RC4V40-AA
WHT-BLK 138.2
BLK-RED 159.0
1,100O325O227
16
5
47/43 /39
3
10
10
10
MUH-30RV - E1
0.56-0.58
NH-56VNHT
2,700
C-R 0.66
C-S 1.58
RA6V75-AA
WHT-BLK 62.8 BLK-YLW 55.9
YLW-RED 26.0
870o850o295
79
55
790-820/420-450
2
2.30
1,200 (MS32N1)
33.18
231.44
33.18
Cooling
8.3
4.5
960/822 /684
15.3-15.5
3,300-3,460
98-93
2.52-2.40
1,280/1,130 /970
2,880-3,000/1,380-1,560
14.41-14.57
Heating
9.6
—
960/834 /732
16.3-15.8
3,520-3,560
98-94
2.73-2.70
1,280/1,150 /1,020
2,880-3,000/1,380-1,560
15.41-14.87
Electrical data
Fan motor
Special remarks
Compressor
Electrical data
Fan motor
Special remarks
Capacity
Coefficient of performance(C.O.P)
Capacity
ww
ww
ww
ww
ww
ww
ww
ww
w
ww
ww
NOTE: Test conditions are based on JIS C 9612.
Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C WB 15.5°C
Outdoor DB35°C WB(24°C) Outdoor DB 7°C WB 6°C
Indoor-Outdoor piping length 5m
wReference value
OB272-1.qxp 02.1.26 1:22 PM Page 7

8
NOISE CRITERIA CURVES
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
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
NOTCH
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
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
NOTCH
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
MSH-18RV- E1 MSH-24RV- 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 35: Wet-bulb temperature 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
52
SPL(dB(A)) LINE
High
NOTCH
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
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 35: Wet-bulb temperature 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
53
SPL(dB(A)) LINE
High
NOTCH
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
MUH-18RV-
MUH-18RV- E2
E1 MUH-24RV- E1
OB272-1.qxp 02.1.26 1:22 PM Page 8

9
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
NOTCH
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5
:
MSH-30RV- 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 35: Wet-bulb temperature 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
55
SPL(dB(A)) LINE
High
NOTCH
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
MUH-30RV- E1
OB272-1.qxp 02.1.26 1:22 PM Page 9

OUTLINES AND DIMENSIONS
10
5
Unit: mm
OUTDOOR UNIT
MSH-18RV -
MSH-24RV - E1
E1
MUH-18RV-
MUH-18RV- E2
E1
INDOOR UNIT
3 297
450
450
352438
254
20
60
40
150 648 217
5190
995
19077550
320
1015
4holes 11✕20 Indoor unit
Installation plate
Power supply cord
Lead to right 2m
Lead to left 1m
Wall hole [75
Installation plate
Liquid line [8-0.5m
Gas line [12-0.43m
Insulation [50 O.D
[28 I.D
Insulation [28
Drain hose [16
Air out
{
Air in
Wireless remote controller
162
19
58
100mm or more
100mm or more
100mm or more
350mm or more
500mm or more
Drainage
3holes [33 Air out
Air in
Air in
Service panel
Liquid refrigerant
pipe joint
Refregerant pipe
(flared) [6.35
Gas refregerant
pipe joint
Refregerant pipe
(flared) [15.88
35-
30-
30
100
161
157
74
850
500
183
20 292
605 248
35
350
50
290 310 345
20
355
90
Drainage
hole [16.2
OB272-1.qxp 02.1.26 1:22 PM Page 10