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
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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

11
162
19
58
47
7.5315
255.547
2.5
98 173
98 173414.5 414.5
5225
253
791
56
1068
1100
325
Air out
Air in
Insulation [28
Drain hose [16
(Connected part O.D)
{
Liquid line [9.52-0.5m
Gas line [19-0.43m
Insulation [50 O.D
[32 I.D
Installation plate
Wall hole [75
Wireless remote controller
Installation plate Indoor unit
INDOOR UNIT
MSH-30RV - E1 Unit: mm
OB272-1.qxp 02.1.26 1:22 PM Page 11

12
100 10
1000For 10 units or less
200
Outdoor Unit-Necessary surrounding clearance
(Concentrated installation) The upper side must be open.
Outdoor Unit-Necessary surrounding clearance
200
10
10
10Note:Allow adequate
upper clearance
150
500
500 Service space
Front opening
R20
R20
25 max.
Standard bolt length
65
Front right piping holes-
detail figures
80
17
12
R6
23 33
Side air intake
724295
Outlet guide
installation hole
302
Air intake
Air intake
Air outlet
870
185 185
500
330 362 1715 39.5 27.5
Terminal block for indoor and outdoor unit connection
Terminal block for power line(MUH-30RV only)
Handle for moving
179 524
441
445
450
468
553850
40 60524
Service panel
Refrigerant-pipe flared
connection [15.88
Refrigerant-pipe flared
connection [9.52
Knock out hole
for front piping
(refrigerant,drainage
and wiring)
42 45
104 33
Bottom
piping hole
2-U-shaped
notched
holes
Drain hole [33
Drain hole [33
2-12o23 Oval holes
(standard bolt M10)
Handle for moving
A
Handle
for moving
138
95 Rear piping hole
Rear fresh
air intake
A
Knock out hole
for right piping
(refrigerant,drainage
and wiring)
60
120
4553
Knock out holes for
power line 2-[27
MUH-24RV-
MUH-30RV- E1
E1
OUTDOOR UNIT
Unit: mm
OB272-1.qxp 02.1.26 1:22 PM Page 12

13
WIRING DIAGRAM
6
MSH-18RV - E1
MUH-18RV - E1
MODEL WIRING DIAGRAM
MODEL WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
BRN
BRN
BLU
102
CN 151
CN 101
CN
REMOTE
CONTROLLER
3
RECEIVER
P.C. BOARD
DISPLAY
P.C. BOARD
MV
5
3
BLU
WHT
L
2
BLU
BLU
F12 2
1
LD1
GRN/YLW
DSAR
POWER SUPPLY
CORD
~/N 220-240V
50Hz
PE
CIRCUIT BREAKER
FOR MULTI SYSTEM
TO OUTDOOR
UNIT
CONNECTING
ELECTRONIC CONTROL P.C. BOARD
12V
52C
RT12
IC141
112
CN
RT11
111
CN
HIC1
NR11
TRANS
200-240V~ 3
14
2
1
C11
CN211
BLK
WHT
GRY
RED
F11 MF
3
121
CN
TO OUTDOOR
UNIT
CONNECTING
RED
3
N
2
12V 3
N
GRN/YLW
TB
YLW
BRN
4
3
CN201
BLU
VG79B021H01
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
DSAR
F11
F12
HIC1
NAME
INDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE (3.15A)
THERMAL FUSE (93;)
DC/DC CONVERTER
SYMBOL
IC141
MF
MV
NR11
RT11
NAME
HYBRID IC
INDOOR FAN MOTOR (INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
SYMBOL
RT12
TB
52C
NAME
INDOOR COIL TEMPERATURE THERMISTOR
TERMINAL BLOCK
CONTACTOR
L
FROM INDOOR UNIT CONNECTING
12V 3TB RED
RED RED
ORN
WHT
BLK
RT61
F61 X62
1
1
2
3
4
1
2
3
4
CN730 CN661 CN721 CN720
SR61
CN711
TAB21
TRANS
TAB20
RED S
C
R
MC
MF
BLK
BLK
BLU
BLU
WHT WHT
WHT
DEICER P.C. BOARD
WHTNO COM
52C
C1
52C
X62
21S4
WHT
DSAR
GRN/YLW
IC881 NR61
C65
BLK BLK VLT VLT
N
2
220-240V~
1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
2.Use copper conductors only. (For field wiring)
3.Symbols below indicate. : Connector
: Terminal block
NOTES:
SYMBOL
C1
C65
DSAR
F61
IC881
NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE (2A)
DC/DC CONVERTER
SYMBOL
MC
MF
NR61
RT61
SR61
NAME
COMPRESOR (INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
SYMBOL
TB
X62
21S4
52C
NAME
TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR
SG79J004H01
OB272-1.qxp 02.1.26 1:22 PM Page 13

14
MUH-18RV - E2 MODEL WIRING DIAGRAM
OUTDOOR UNIT
FROM INDOOR UNIT CONNECTING
12V 3TB RED
RED RED
ORN
WHT
BLK
RT61
F61 X62
1
1
2
3
4
1
2
3
4
CN730 CN661 CN721 CN720
SR61
CN711
TAB21
TRANS
TAB20
RED S
C
R
MC
MF
BLK
BLK
BLU
BLU
WHT WHT
WHT
DEICER P.C. BOARD
WHTNO COM
52C
C1
52C
X62
21S4
WHT
DSAR
GRN/YLW
IC881 NR61
C65
BLK BLK VLT VLT
N
2
220-240V~
1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
2.Use copper conductors only. (For field wiring)
3.Symbols below indicate. : Connector
: Terminal block
NOTES:
SYMBOL
C1
C65
DSAR
F61
IC881
NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE (2A)
DC/DC CONVERTER
SYMBOL
MC
MF
NR61
RT61
SR61
NAME
COMPRESOR (INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
SYMBOL
TB
X62
21S4
52C
NAME
TERMINAL BLOCK
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR
VG79B115H01
OB272-1.qxp 02.1.26 1:22 PM Page 14

15
MSH-24RV - E1
MUH-24RV - E1
MODEL WIRING DIAGRAM
MODEL WIRING DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
WHT
WHT
BLU
102
CN 151
CN 101
CN
REMOTE
CONTROLLER
3
RECEIVER
P.C. BOARD
DISPLAY
P.C. BOARD
MV
5
3
BRN
WHT
L
2
BLU
BLU
F12 2
1
LD1
GRN/YLW
DSAR
1
POWER SUPPLY
CORD
~/N 220-240V
50Hz
ELECTRONIC CONTROL P.C. BOARD
12V
111
CN
52C
RT12
IC141
112
CN
HIC1
NR11
TRANS
220-240V~ 3
1
4
2
1
C11
CN211
BLK
WHT
GRY
RED
RT11
F11 MF
3
121
CN
TO OUTDOOR
UNIT
CONNECTING
RED
3
N
GRN/YLW
TB
YLW
BRN
4
3
CN201
BLU
VG79B022H01
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
DSAR
F11
F12
HIC1
NAME
INDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE (3.15A)
THERMAL FUSE (93;)
DC/DC CONVERTER
SYMBOL
IC141
MF
MV
NR11
RT11
NAME
HYBRID IC
INDOOR FAN MOTOR (INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
SYMBOL
RT12
TB
52C
NAME
INDOOR COIL THERMISTOR
TERMINAL BLOCK
CONTACTOR
PE
CIRCUIT BREAKER
DEICER P.C. BOARD
NOTES: 1.Use copper conductors only (For field wiring).
2.Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers (3,N,2).
3.Symbols below indicate.
:Terminal block, :Connector
WHT WHT
CZ
RED
GRN/YLW
COM NO
T61
BLU
ORN C2
6543
RED
ORN WHT BLK
12
YLW
YLW BLK WHT
RED
321
RT63 MF
CN662 CN711
3
1
5
NR61
X52
CN730
TAB52
F61 NO
COM
SR61
SR62
RED
BLU WHT
21S4
3
CN721
2
1
X62
X62
X52
RT61
CN661
MC
R
C
S
BLK
BLU C1
WHT WHT
52C 2
1
FROM INDOOR UNIT CONNECTING
TB
DSAR
52C
BLU
WHT
A1
A2
12V
220-240V ~
N
2
3
SYMBOL
CZ
C1
C2
DSAR
F61
MC
MF
NR61
RT61
RT63
SR61
SR62
TB
T61
X52
X62
21S4
52C
NAME
CZ SURGE ABSORBER
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE (3.15A)
COMPRESSOR (INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
AMBIENT TEMPERATURE THERMISTOR
SOLID STATE RELAY
SOLID STATE RELAY
TERMINAL BLOCK
TRANSFORMER
CONTACTOR
R. V. COIL RELAY
R. V. COIL
COMPRESSOR CONTACTOR
SG79J183H01
OB272-1.qxp 02.1.26 1:22 PM Page 15

16
OUTDOOR UNIT
DEICER P.C. BOARD
COM NO
T61
BLU
LEV
ORN C2
6543
RED
ORN WHT BLK
1
2
YLW
YLW BLK
WHT
RED
321
RT63
RT62 MF
6
CN662 CN724
CN711
3
1
5
NR61
X52
CN730
TAB52
F61NO
COM
SR61
SR62
RED
BLU WHT
BRN
BLU WHT BLU
21S4
3
CN721
2
1
X62
X62 X52
RT61
CN661
MC R
C
S
BLK
RED
C1
WHT
WHT WHT
52C
CZ
21
TO INDOOR UNIT CONNECTING
POWER SUPPLY
~ /N 220-240V
50Hz
GRN/YLW
TB1
TB2
DSAR
52C
BLU
WHT
A1
A2
12V
220-240V~
N
L
3
N
L
PE
CIRCUIT BREAKER
SYMBOL
TB1
TB2
T61
X52
X62
21S4
52C
SYMBOL
MF
NR61
RT61
RT62
RT63
SR61
SR62
SYMBOL
CZ
C1
C2
DSAR
F61
LEV
MC
NAME NAME NAME
CZ SURGE ABSRBER
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
EXPANSION VALVE COIL
COMPRESSOR (INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMISTOR
AMBIENT TEMPERATURE THERMISTOR
SOLID STATE RELAY
SOLID STATE RELAY
TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
CONTACTOR
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR
NOTE 1. Use copper conductors only (For field wiring).
2. Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers (3,N, L).
3. Symbols below indicate.
/: Terminal block, : Connector
SG79J149H02
MUH-30RV - E1 MODEL WIRING DIAGRAM
INDOOR UNIT
TB
TAB12
33
REMOTE
CONTROLLER
RECEIVER
P.C.BOARD
DISPLAY
P.C.BOARD
102
CN 101 CN
RED
BLU
MV2
GRN/YLW
TO OUTDOOR
UNIT
CONNECTING
12V CN201
3
2
1
BRN
L
N
3
220-240V~F11
ELECTRONIC CONTROL P.C. BOARD
NR11
CN211
CN
111 RT11
RT12
15
MV2
CN
151
CN112
1
2
3
4RT13
MV1
TRANS
HIC1
C11
121
CN
1
3
4
SR141
3
MF
RED
WHT
BRN
YLW
GRY
BLK
SYMBOL
SR141
TB
SYMBOL
MV2
NR11
RT11
RT12
RT13
SYMBOL
C11
F11
HIC1
MF
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
SG79J148H01
MSH-30RV - E1 MODEL WIRING DIAGRAM
OB272-1.qxp 02.1.26 1:22 PM Page 16

17
REFRIGERANT SYSTEM DIAGRAM
7
MSH-18RV - E1 MUH-18RV -
MUH-18RV - E2
E1
INDOOR UNIT OUTDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe [15.88
(with heat insulator)
Flared connection
Flared connection
Indoor coil
thermistor
RT12
Refrigerant pipe[6.35
(with heat insulator)
Stop valve
Strainer
Check valve
Capillary tube
[3.0o[2.0o500
Capillary tube
[3.0o[1.6o750
(2 pcs)
Compressor
Accumulator
Stop valve
(with service port)
Muffler
Outdoor
heat
exchanger
Defrost
thermistor
RT61
R.V. coil
Heating ON
Cooling OFF
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
Distributor
4- way valve
MSH-24RV - E1 MUH-24RV - E1
INDOOR UNIT OUTDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe [15.88
(with heat insulator)
Flared connection
Flared connection
Indoor coil
thermistor
RT12
Refrigerant pipe [9.52
(with heat insulator)
Stop valve
Strainer
Check
valve
Check
valve
Capillary tube
[3.0X[1.6X350
Capillary tube
[4.0X[2.4X200
Defrost
thermistor
RT61
Compressor
Accumulator
Stop valve
(with service port)
Muffler
Outdoor
heat
exchanger
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
Distributor
4- way valve
Unit:mm
[3.0X[2.0X350
Capillary tube
Discharge pressure
regulator open
2.30MPa
(23.5 kgf/F)
Unit:mm
R.V. coil
Heating ON
Cooling OFF
Ambient
tempera-
ture
thermistor
RT63
OB272-1.qxp 02.1.26 1:22 PM Page 17

18
MSH-30RV - E1 MUH-30RV - E1
INDOOR UNIT OUTDOOR UNIT
Unit:mm
Indoor
heat
exchanger
Outdoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13(sub)
Defrost
thermistor
RT61
Discharge
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
[4.2✕[3.0✕50 Refrigerant flow in cooling
Compressor
Muffler
4-way valve
Refrigerant flow in heating
Refrigerant pipe [15.88
(with heat insulator)
Refrigerant pipe [9.52
(with heat insulator)
Indoor coil
thermistor
RT12(main)
LEV R.V. coil
heating ON
cooling OFF
Strainer
StrainerStrainer
Check
valve
Accumulator
Ambient
temperature
thermistor
RT63
Strainer Capillary tube
[4.2✕[3.0✕50
Model Piping size O.D : mm Length of connecting pipe : m
Refrigerant piping
Max. length : m
A
15
30
Indoor unit
Gas 0.43
Liquid 0.5
Gas
15.88
Liquid
6.35
9.52
Outdoor unit
Gas 0
Liquid 0
MSH-18RV - E1
MUH-18RV - E1
MSH-24RV - E1
MUH-24RV - E1
MSH-30RV - E1
MUH-30RV - E1
MUH-18RV - E2
Indoor
unit
wMax. Height
difference: 5m
(MSH-18/24RV)/
15m (MSH-30RV) A
Refrigerant Piping
Max. Length
wHeight difference should be within 5m (MSH-18/24RV) / 15m (MSH-30RV)
regardless of which unit, indoor or outdoor position is high.
Outdoor unit
MAX. HEIGHT DIFFERENCE
MAX. REFRIGERANT PIPING LENGTH
OB272-1.qxp 02.1.26 1:22 PM Page 18

19
Model
MSH-18RV - E1
MUH-18RV - E1
MUH-18RV - E2
Refrigerant piping length (one way)
Outdoor unit precharged
1,650
15m
400
7m
0
10m
150
ADDITIONAL REFRIGERANT CHARGE(R22 : g)
Calculation : Xg=50g/m ✕ (Refrigerant piping length (m)–7)
Model
MSH-24RV - E1
MUH-24RV - E1
Refrigerant piping length (one way)
Outdoor unit precharged
2,400
15m
520
7m
0
10m
195
Calculation : Xg=65g/m ✕ (Refrigerant piping length (m)–7)
Outdoor unit
precharged
0195 520
Refrigerant piping length (one way)
15m10m7m
Model
MSH-30RV - 2,300
E1
20m 25m 30m
845 14951170
MUH-30RV - E1
Calculation : Xg=65g/mo(Refrigerant piping length(m)-7)
OB272-1.qxp 02.1.26 1:22 PM Page 19

PERFORMANCE CURVES
20
8
11.2
7.2
8.2
9.1
10.1
12.2
16.8
10.5
12.0
13.5
15.1
18.6
12.7
8.1
9.2
10.3
11.5
14.0
MSH-18RV - E1 MSH-24RV - E1 MSH-30RV - E1
The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,
since operating conditions vary according to the areas where these units are installed. The following information has been pro-
vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
(1) GUARANTEED VOLTAGE
198 ~ 264V, 50Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature : °CWB
(2) Indoor outlet air wet-bulb temperature : °CWB
(3) Outdoor intake air dry-bulb temperature : °CDB
(4) Total input: W
(5) Indoor intake air dry-bulb temperature : °CDB
(6) Outdoor intake air wet-bulb temperature : °CWB
(7) Total input : W
Indoor air wet/dry-bulb temperature difference on the left side of the chart on this page and next page shows the differ-
ence between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your
reference at service.
How to measure the indoor air wet-bulb/dry-bulb temperature difference
1. Attach at least 2 sets of wet-and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets
of wet-and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air
speed is high.
2. Attach at least 2 sets of wet-and dry-bulb thermometers to the outdoor air intake.
Cover the thermometers to prevent direct rays of the sun.
3. Check that the air filter is cleaned.
4. Open windows and doors of room.
5. Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY COOL(HEAT) MODE.
6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
7. 10 minutes later, measure temperature again and check that the temperature does not change.
INDOOR UNIT OUTDOOR UNIT
}
}
Cooling
Heating
Wet-and dry-bulb
thermometers Wet-and dry-bulb
thermometers
MSH-18RV - MUH-18RV - MUH-18RV -
MSH-24RV - MUH-24RV -
MSH-30RV - MUH-30RV - E1E1
E1E1
E2E1E1
OB272-1.qxp 02.1.26 1:22 PM Page 20