Mitsubishi MUX-19TV-E1, MUX-20TV-E1, MUX-25TV-E1 Service Manual
SPLIT-TYPE,AIR CONDITIONERS
SERVICE MANUAL
Multi system type
Models
No. OB284
MUX-19TV MUX-20TV MUX-25TV -
E1
E1
E1
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ···························3
4. SPECIFICATION·················································3
5. NOISE CRITERIA CURVES······························ 6
6. OUTLINES AND DIMENSIONS························ 7
7. WIRING DIAGRAM ············································9
8. REFRIGERANT SYSTEM DIAGRAM··············10
MUX-19TV MUX-20TV MUX-25TV -
This manual describes technical data of outdoor unit.
For indoor unit refer to the service manuals No.OB227 REVISED EDITION-B and OB252 REVISED EDITION-A of corresponding models.
E1
E1
E1
9. PERFORMANCE CURVES······························14
10. TROUBLESHOOTING ······································26
11. DISASSEMBLY INSTRUCTIONS·····················32
12. PARTS LIST······················································35
13. OPTIONAL PARTS ···········································37
1
TECHNICAL CHANGES
MUX-19TV MUX-20TV MUX-25TV -
New models
2
E1
E1
E1
PART NAMES AND FUNCTIONS
OUTDOOR UNIT
MUX-19TV MUX-20TV MUX-25TV -
E1
E1
E1
Air inlet
(Back and side)
Piping
Drainage hose
Air outlet
2
3
❈There is no combination other than this table.
MUX-19TV-
E1
MUX-20TV-
E1
MUX-25TV-
E1
Combination of the
connectable indoor units
OUTDOOR UNIT
A:07, B:12 A:09, B:09, C:09 A:12, B:12
Outdoor model
Capacity
Dehumidification
Outdoor air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity(R22)
Refrigerating oil (Model)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
Opetate 1 unit
A
3.5
1.6
6.01
1,280
92.6
5.68
0.33
2.65
Opetate 2 unit
A+B
3.5+2.2
1.6+0.8
8.94
2,005
97.5
8.37
0.57
2.74
MUX-19TV -
E1
Single phase
230V, 50Hz
Opetate 1 unit
B
2.2
0.8
Hi:2,460 / Lo:1,920
15
3.33
745
—
97.3
45.6
3.00
0.33
2.82
RH220VHAT (Room A) / RH135VHAT (Room B)
1,050 / 650
C-R 2.13/4.18
C-S 3.91/5.76
RA6V60-DA
WHT-BLK 90 BKL-YLW 54
BLK-RED 146
840✕640✕330
63
52
High:730 / Low:580
2
Room A : 0.87
Room B :1.0
520(MS56) / 300(MS56)
Compressor
Electrical
data
Fan
motor
Special
remarks
Capacity
Coefficient of performance(C.O.P)
Outdoor unit power supply
Indoor unit No.
INDOOR / OUTDOOR CORRESPONDENCE TABLE
4
NOTE: Test conditions are based on ISO 5151.
SPECIFICATION
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB(24°C)
3
Outdoor model
Capacity
Dehumidification
Outdoor air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity(R22)
Refrigerating oil (Model)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
Opetate 1 unit
A
2.5
1.1
3.43
775
98.2
3.10
0.33
3.09
Opetate 1 unit
B or C
2.7
1.2
4.23
965
99.2
3.90
0.33
2.70
Opetate 2 unit
A+B or A+C
2.4+2.7
0.9+1.2
7.56
1,740
99.9
6.99
0.57
2.82
Opetate 3 unit
A+B+C
2.4+1.75✕2
0.9+0.3✕2
7.79
1,785
99.6
7.22
0.57
3.12
MUX-20TV -
E1
Single phase
230V, 50Hz
Opetate 2 unit
B+C
1.75✕2
0.3✕2
High: 2,460 / Low: 1,920
15
4.36
1,000
—
99.7
40
4.03
0.33
3.27
RH140VHAT (Room A) / RH174VHAT (Room B,C)
700/800
C-R 4.03/3.30
C-S 5.71/5.80
RA6V60-DA
WHT-BLK 90 BLK-YLW 54
BLK-RED 146
840✕640✕330
62
52
High: 730 / Low: 580
2
Room A : 0.8
Room B,C : 0.96
300(MS56) / 300(MS56)
Compressor
Electrical
data
Fan
motor
Special
remarks
Capacity
Coefficient of performance(C.O.P)
Outdoor unit power supply
Indoor unit No.
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB(24°C)
4
Outdoor model
Outdoor unit power supply
Indoor unit No.
Capacity
Dehumidification
Outdoor air flow
Capacity
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Electrical
data
Starting current
Compressor motor current
Fan motor current
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
Coefficient of performance(C.O.P)
Model
Output
Winding
Compressor
resistance(at20:)
Model
Winding
Fan
motor
resistance(at20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
W
"
"
mm
kg
dB
rpm
Fan speed regulator
Refrigerant filling
Special
remarks
capacity(R22)
Refrigerating oil (Model)
kg
cc
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB(24°C)
MUX-25TV -
Single phase
230V, 50Hz
Opetate 1 unit
A or B
3.5
1.6
High:2,760 / Low:1,920
6.11
1,350
96.1
5.79
0.32
2.52
RH231VHAT✕2
1,100✕2
C-R 2.13
C-S 3.91
RA6V60-EA
WHT-BLK 67 BLK-YLW 75
BLK-RED 73
840✕640✕330
High: 810 / Low: 580
Room A: 0.9
Room B: 0.9
520(MS56) / 520(MS56)
25
—
56
65
54
E1
Opetate 2 unit
A+B
3.5✕2
1.6✕2
12.42
2,760
96.6
11.81
0.61
2.46
2
5
NOISE CRITERIA CURVES5
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB35: WB24:
High
SPEED
52
SPL(dB(A)) LINE
MUX-19TV - E1
MUX-20TV - E1
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB35: WB24:
High
SPEED
54
SPL(dB(A)) LINE
MUX-25TV - E1
6
6
500
840 61.7
264.2
10°
10°
Service panel
Open as a rule
500mm or more if
the front and both
sides are open
100mm or more
200mm or more if
there are obstacles
to both sides
Open as a rule
500mm or more if the back,
both sides and top are open
350mm or more
100mm or more
B UNIT
A UNIT
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {12.7
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35
66.2
80.7
121.3
40
438.4
Air in
Air out
Air in
272.9
100.3
125.6
319.8
34
330
640
360.6
75.8
505050
Drainage
3hoies {33
}
}
OUTLINES AND DIMENSIONS
OUTDOOR UNIT
MUX-19TV-
E1
Unit: mm
OUTDOOR UNIT
MUX-20TV-
E1
Drainage
3hoies {33
125.6
Air in
34
100.3
319.8
272.9
438.4
Air in
Air out
500
40
840 61.7
121.3
330
640
66.2
7
100mm or more
360.6
Open as a rule
500mm or more if the back,
both sides and top are open
10°
10°
}
}
}
264.2
Service panel
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35
C UNIT
B UNIT
A UNIT
5050505050
75.8
Unit: mm
Open as a rule
500mm or more if
the front and both
sides are open
100mm or more
200mm or more if
there are obstacles
to both sides
350mm or more
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52
OUTDOOR UNIT
MUX-25TV-
E1
Drainage
3hoies {33
125.6
Air in
34
100.3
319.8
272.9
500
438.4
Air in
Air out
840 61.7
121.3
Unit: mm
Open as a rule
500mm or more if
the front and both
sides are open
100mm or more
100mm or more
330
360.6
Open as a rule
500mm or more if the back,
40
640
both sides and top are open
10°
10°
B UNIT
}
A UNIT
}
Service panel
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35
505050
200mm or more if
there are obstacles
to both sides
350mm or more
80.7
264.2
Gas refrigerant
pipe joint
75.8
Refrigerant pipe
(flared) {12.7
8
7
1
2
3
123
2
1
3
(3.15A)
RED
RED
NR61
T61
1
2
43
43
C61
LD1
WHT
WHT
OUTDOOR CONTROL PC BOARD
BRN
BLU
BRN
BLU
BRN
X522
X521
BLK
SR862
SR861
LD2
RED
BLK
YLW
WHT
652341
BRN
BLU
BLU
TB4
CN91
CN90
TB2
X521X522
F61
CN73 CN71
TO INDOOR
UNIT B
CONNECTING
12V
PE
CIRCUIT BREAKER
GRN/YLW
ORN
BLU
YLW
BLU
RED
RED
TO INDOOR
UNIT A
CONNECTING
12V
1
2
C2
C1
RC
S
CR
S
MC2
MF61
MC1
BLK
TB1
POWER SUPPLY
~/N
230V
50Hz
1
2
L
N
SYMBOL
C1
C2
C61
F61
MC1
SYMBOL
MC2
MF61
NR61
SR861
SR862
SYMBOL
TB1
TB2~TB4
T61
X521
X522
NAME
COMPRESSOR CAPACITOR (MC1)
COMPRESSOR CAPACITOR (MC2)
FAN MOTOR CAPACITOR
FUSE (3.15A)
COMPRESSOR (INNER PROTECTOR)
NAME
COMPRESSOR (INNER PROTECTOR)
FAN MOTOR (INNER PROTECTOR)
SURGE ABSORBER
FAN MOTOR RELAY
FAN MOTOR RELAY
NAME
TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
COMPRESSOR CONTACTOR (MC1)
COMPRESSOR CONTACTOR (MC2)
1
2
3
1
2
3
123
2
1
3
(3.15A)
123123123
RED
RED
21R421R3
NR61
T61
1
2
43
43
C61
LD1
WHT
WHT
OUTDOOR CONTROL PC BOARD
BRN
BLU
BRN
BLU
BRN
BLU
BLU
X522
X521
BLK
SR865
SR866
SR863
SR862
SR861
LD2
RED
BLK
YLW
WHT
652341
BRN
BLU
BLU
TB4
CN86
CN85
CN81
CN91
CN90
TB3
TB2
X521
BLU
BLU
X522
BLU
BLU
21RB
F61
CN74 CN73 CN71
TO INDOOR
UNIT B
CONNECTING
12V
PE
CIRCUIT BREAKER
GRN/YLW
WHT
BLU
ORN
BLU
YLW
BLU
RED
RED
TO INDOOR
UNIT A
CONNECTING
12V
1
2
1
2
C2
C1
RC
S
CR
S
MC2
TO INDOOR
UNIT C
CONNECTING
12V
MF61
MC1
BLK
TB1
POWER SUPPLY
~/N
230V
50Hz
1
2
L
N
SYMBOL
C1
C2
C61
F61
MC1
MC2
MF61
SYMBOL
NR61
SR861
SR862
SR863
SR865
SR866
TB1
SYMBOL
TB2~TB4
T61
X521
X522
21RB
21R3
21R4
NAME
COMPRESSOR CAPACITOR (MC1)
COMPRESSOR CAPACITOR (MC2)
FAN MOTOR CAPACITOR
FUSE (3.15A)
COMPRESSOR (INNER PROTECTOR)
COMPRESSOR (INNER PROTECTOR)
FAN MOTOR (INNER PROTECTOR)
NAME
SURGE ABSORBER
FAN MOTOR RELAY
FAN MOTOR RELAY
RELAY (21RB)
RELAY (C) (21R4)
RELAY (B) (21R3)
TERMINAL BLOCK
NAME
TERMINAL BLOCK
TRANSFORMER
COMPRESSOR CONTACTOR (MC1)
COMPRESSOR CONTACTOR (MC2)
SOLENOID COIL
SOLENOID COIL (B)
SOLENOID COIL (C)
WIRING DIAGRAM
MUX-19TV - MUX-25TV -
OUTDOOR UNIT
MODELS WIRING DIAGRAM
E1E1
NOTE:1. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.
MUX-20TV -
OUTDOOR UNIT
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
E1
MODEL WIRING DIAGRAM
2. Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
9
VG79B082H01
VG79B081H01
8
REFRIGERANT SYSTEM DIAGRAM
MSC-07RVMSC-12RV-
INDOOR UNIT
UNIT A
MSC-12RV
MSC-07RV
E3
UNIT B
E3
E3
E3
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Indoor
heat
exchanger
Room
temperature
thermistor
RT11
Room
temperature
thermistor
RT11
Refrigerant pipe
{12.7
(With insulation)
Flared connection
Refrigerant pipe
{6.35
(With insulation)
Refrigerant pipe
{9.52
(With insulation)
Flared connection
Stop valve
with service port
Stop valve
Capillary tube
{
Stop valve
with service port
3.0 ✕{1.6 ✕ 660
Compressor(MC1)
MUX-19TV-
OUTDOOR UNIT
E1
Outdoor
heat
exchanger
Unit: mm
Indoor coil
thermistor
RT12
Refrigerant pipe
{6.35
(With insulation)
Stop valve
Capillary tube
{
3.0 ✕{1.4 ✕ 810
Compressor(MC2)
MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE
Max. limits
MUX-19TV
UNIT No.
,
Outdoor unit
BA
Indoor unit B
MSC-07RV
E1
L
E3
LLHH
Additional piping max. length 15m
Pipe length
15m
Indoor unit A
MSC-12RV
E3
Height difference (H)
10m
ADDITIONAL REFRIGERANT CHARGE (R22:g)
A
B
UNIT
UNIT
Outdoor unit
precharged (g)
870
1,000
7m
0 153045607590105120
8m 9m 10m 11m 12m 13m 14m 15m
Refrigerant piping length (one way)
PIPING PREPARATION
1 Table below shows the specifications of pipes commercially available.
UNIT No. Pipe
BA
and UNIT For liquid 6.35 8 mm
B
UNIT For gas 9.52 8 mm
A
UNIT For gas 12.7 8 mm
2 Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3 Refrigerant bending radius must be 10cm or more.
Outside diameter Insulation
mm thickness
10
No. of bends
10
Insulation material
Heat resisting foam plastic
0.045 specific gravity
Unit: mm
MSC-09RV-
INDOOR UNIT
UNIT A
MSC-09RV
MSC-09RV
E3
UNIT B
E3
E3
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
Room
temperature
thermistor
RT11
Room
temperature
thermistor
RT11
Refrigerant pipe
{9.52
(With insulation)
Flared connection
Refrigerant pipe
{6.35
(With insulation)
Refrigerant pipe
{9.52
(With insulation)
Flared connection
Refrigerant pipe
{6.35
(With insulation)
Refrigerant pipe
{9.52
Stop valve
with service port
Stop valve
Stop valve
with service port
Stop valve
Solenoid valve
21R3
{
Capillary tube
{
3.0✕{1.4 ✕ 450
Capillary tube
3.0✕{1.6 ✕ 900
Compressor(MC1)
Solenoid valve
21RB
Capillary tube
{
3.0✕{1.6 ✕ 1,000
Compressor(MC2)
Capillary tube
{
3.0✕{1.8 ✕ 450
MUX-20TV-
E1
OUTDOOR UNIT
Outdoor
heat
exchanger
UNIT C
MSC-09RV
E3
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Flared connection
Refrigerant pipe
{6.35
(With insulation)
Stop valve
with service port
Solenoid valve
21R4
Stop valve
Capillary tube
{
3.0✕{1.6 ✕ 900
Refrigerant flow
11
LC
Indoor unit C
MSC-09RV - E3
HL
B HLA
H
Indoor unit B
MSC-09RV - E3
Indoor unit A
MSC-09RV - E3
Outdoor unit
MUX-20TV - E1
MUX-20TV-
7m
0
10m011m1012m2013m3014m4015m5016m6017m7018m8019m9020m
100
21m
110
22m
120
23m
130
24m
140
25m
150
26m
160
27m
170
28m
180
29m
190
30m
200
8m
15
9m
30
10m4511m
60
12m7513m
90
14m
105
15m
120
Refrigerant piping length (one way)
A
unit
Refrigerant piping length (one way, 2 unit total)
Outdoor unit
precharged (g)
800
Outdoor unit
precharged (g)
960
B
unit + C unit
E1
MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE
Max.
limits
UNIT No.
A
B
C
LA
LB
LC
Pipe length
15m
15m
15m
L
B
+
LC
Total
30m
Height difference (H)
10m
10m
10m
Note: The length of piping to individual units (A,B,C) should not exceed 10 meters.
If units B and C are linked, the maximum combined length of piping should not exceed 15 meters.
ADDITIONAL REFRIGERANT CHARGE (R22:g)
PIPING PREPARATION
1Table below shows the specifications of pipes commercially available.
UNIT No.
BA
, and
C
unit
Pipe
For liquid
For gas
Outside diameter
mm
6.35
9.52
Insulation
thickness
8mm
8mm
No. of bends
10
10
10
Insulation material
Heat resisting foam plastic
0.045 specific gravity
Total
15
2Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3Refrigerant bending radius must be 10cm or more.
12
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