Mitsubishi MSC-C07SV User manual

SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ···································2
2. SPECIFICATION················································5
3. NOISE CRITERIA CURVES······························7
4. WIRING DIAGRAM ···········································8
5. REFRIGERANT SYSTEM DIAGRAM·············10
6. PERFORMANCE CURVES·····························11
7. SERVICE FUNCTIONS···································23
8. TROUBLESHOOTING ····································23
9. PARTS LIST····················································24
Wireless type
Models
MSC-C07SV - (WH) · MUH-C07SV -
MSC-C09SV - (WH) · MUH-C09SV -
MSC-C12SV - (WH) · MUH-C12SV -
MSH-C18SV - (WH) · MUH-C18SV - E1E1
E1E1
E1E1
E1E1
No. OB250
REVISED EDITION-A
MSC-C07SV -
MSC-C09SV -
MSC-C12SV - E1
E1
E1
NOTE: This service Manual covers only change points.
•MSC-07/09/12RV - , MUH-07/09/12RV - ➔ MSC-C07/C09/C12SV - , MUH-C07/C09/C12SV -
Please refer to the Service Manual OB227 REVISED EDITION-B for unchanged contents.
•MSH-18NV - , MUH-18NV - ➔ MSH-C18SV - , MUH-C18SV -
Please refer to the Service Manual OB229 REVISED EDITION-A for unchanged contents.
E1E1E4E4
E1E1E1E1
HFC
utilized
R-407C
Revision
• Set temperature change of Operating Temperature of
Defrosting in MUH-C09SV- .
•Change of refrigeration oil amount of MUH-C07/C09SV- .
•Installed place change of defrost thermistor RT61 in
MUH-C07/C09/C12SV- .
•Please void OB250. E1
E1
E1
OB250-A.qxp 3/10/00 1:19 PM Page 1

2
TECHNICAL CHANGES
1
The following are in common details.
1. Refrigerant type has changed from R-22(HCFC) to R-407C(HFC).
2. Rated voltage has changed from 220-240V to 220-230V.
3. Compressor has changed from one for R-22 to one for R-407C.
4. Jumper wire JPE for defrosting temperature change in deicer P.C.board is cut at factory shipping.
5. Refrigerant circuit has changed. (Accumulator has been removed.)
MSH-18NV - ➔MSH-C18SV -
1. It has become impossible that MSH-C18SV- is connected to MXZ series as multi system units.
MUH-07RV - ➔MUH-C07SV -
1. Path of heat exchanger has changed.
2. Operating Temperature of Defrosting has changed.
Starting of defrost : -3:or less ➔0:or less
Releasing of defrost : 3.1:or more ➔10.1:or more
3. Refrigerant oil has changed from MS56 to NEO22.
MUH-09RV - ➔MUH-C09SV -
1. Path of heat exchanger has changed.
2. Operating Temperature of Defrosting has changed.
Starting of defrost : -3:or less ➔4.3:or less
Releasing of defrost : 3.1:or more ➔14.7:or more
3. Refrigerant oil has changed from MS56 to NEO22.
MUH-12RV - ➔MUH-C12SV -
1. Capillary tube has changed. {3.0X{1.8X300➔{3.0X{1.8X250, {3.0X{1.6X700➔{3.0X{1.6X800)
2. Operating temperature of High Pressure Protection has changed.
Outdoor fan motor ON : 48:➔56:
Outdoor fan motor OFF: 52:➔60:
3. Operating temperature of Defrosting has changed.
Starting of defrost : -3:or less ➔0:or less
Releasing of defrost : 3.1:or more ➔10.1:or more
4. Refrigerant oil has changed from MS56 to NEO22.
MUH-18NV - ➔MUH-C18SV -
1. Operating temperature of High Pressure Protection has changed.
Outdoor fan motor ON : 56:➔52:
Outdoor fan motor OFF: 60:➔56:
2. Operating temperature of Defrosting has changed.
Starting of defrost : -3:or less ➔0:or less
Releasing of defrost : 3.1:or more ➔10.1:or more
3. Refrigerant oil has changed from MS32N1 to NEO22.
E1E4
E1E1
E1E1
E1E1
E1
E1E4
OB250-A.qxp 3/9/00 9:48 AM Page 2

3
New Specification Previous Specification
The incompatible lubricant easily separates from refrigerant
and makes the layer in the upper inside the suction muffler.
The higher position of the returning oil hole enables to return
the lubricant of the upper layer to the compressor.
Since refrigerant and lubricant are compatible each other,
lubricant returns to the compressor through the lower
position returning oil hole.
Compressor
Suction muffler
Returning oil hole
Lubricant
Refrigerant
Compressor
Suction muffler
Returning oil hole
Lubricant and Refrigerant
Compressor
-30 -20 -10 0 10 20 30 40 50 60
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
(MPa [Gauge])
R-407C
R-22
Conversion chart of refrigerant temperature and pressure
Saturated liquid pressure
(:)
NOTE :The unit of pressure has been changed to MPa on the
international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
Lubricant
Refrigerant
New refrigerant
R-407C
R-32: R-125: R-134a (23%:25%:52%)
Non-azeotropic refrigerant
Not included
A1/A1
86.2
-43.6
0.9177
42.5
Non combustible
0
1530
From liquid phase in cylinder
Impossible
Incompatible oil
Non
Non
Previous refrigerant
R-22
R-22 (100%)
Single refrigerant
Included
A1
86.5
-40.8
0.94
44.4
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (:)
Steam pressure [25:](Mpa [Gauge])
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO2
INFORMATION FOR THE AIR CONDITIONER WITH R-407C REFRIGERANT
This room air conditioner adopts HFC refrigerant (R-407C) which is never destroy the ozone layer.
Pay attention following points.
1Take sufficient care not to allow water and other contaminations to enter the R-407C refrigerant during storage and
installation, since it is more susceptible to contaminations than HCFC refrigerant.
2Clean refrigerant pipings should be used.
3Composition change may occur in R-407C since it is a mixed refrigerant. When charging, charge liquid refrigerant to
prevent composition change.
4Be especially careful when managing the tools.
If dust, dirt, or water mixes in the refrigerant cycle, it may cause decrease of performance.
OB250-1qxp 3/3/00 2:07 PM Page 3

4
2.Refrigerant piping
Do not use copper pipes which are broken, deformed or discoloured.
In addition, be sure that the inner surfaces of the pipes are clean, free of hazardous sulfur and oxides, or have no dust/ dirt,
shaving particles, oil, moisture or any other contamination.
•If there is a large amount of residual oil inside the piping and joints, deterioration of the refrigerant oil will result.
3.Refrigerant oil
Apply the specific refrigeration oil (accessories) to the flare and the union seat surfaces.
4.Air purge
Use the vacuum pump for air purge to protect environments, and to avoid changing the composition of refrigerant.
5.Additional charge
For additional charging, charge the refrigerant with liquid phase slowly using a gas cylinder. If the refrigerant is charged with
gas phase, the composition of refrigerant will change.
If liquid refrigerant is rapidly charged at once, the compressor may be locked.
Electronic scale for
refrigerant charging
Refrigerant
gas cylinder
operating
valve
Refrigerant gas cylinder
for R-407C with siphon
Refrigerant (liquid)
Gage manifold
Outdoor unit
Indoor unit
Union
Liquid pipe
Gas pipe
Service port
Stop valve
Charge hose
1.Tools dedicated for the air conditioner with R-407C refrigerant
The following tools are required for R-407C refrigerant. Some R-22 tools can be substituted for R-407C tools.
Do not use tools that are used with R-22 refrigerant in order to avoid mixing oils.
R-407C tools Can R-22 tools be used?
Gas leak detector
A gauge manifold with a sight glass is recommended for charging the
liquid refregerant.
Hose material have been changed to improve the pressure
resistance.
Dedicated for HFC refrigerant.
Description
Provided to prevent the back flow of oil. This adapter enables you to use
existing vacuum pumps.
It is difficult to measure R-407C with a charging cylinder because of
refrigerant bubbles due to high pressure and high-speed vaporization.
No
No
No
Yes
Yes
New
New
Gauge manifold
Charge hose
Torque wrench
Flare tool
Vacuum pump
adapter
Electronic scale for
refrigerant charging
OB250-1qxp 3/3/00 2:07 PM Page 4

5
SPECIFICATION
2
Indoor model
Function
Indoor unit power supply
Air flow(Hi)
Power outlet
Running current
Power input
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Air direction
Sound level (Hi)
Fan speed (Hi)
Fan speed regulator
Thermistor RT11(at25:)
Thermistor RT12(at25:)
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(R-407C)
Refrigerating oil (Model)
Thermistor
RT61(at0:)
K/h
A
A
W
%
A
A
"
mm
kg
dB
rpm
k"
k"
kW
R/h
K/h
A
A
W
A(kW)
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
k"
MSC-C07SV - E1
Single phase
220-230V,50Hz
10
0.17
35
93.6-89.5
—
0.17
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
9
5
3
10
10
MUH-C07SV - E1
Single phase
220-230V,50Hz
1,620-1,668
10
—
18
0.28-0.29
RE-135VGSHT
650
C-R 4.21
C-S 5.93
RA6V23-EA
WHT-BLK 258
BLK-RED 385
780o540o255
33
47
620-645
1
0.85
350 (NEO22)
33.18
Cooling
474
36
950
2.2
0.8
3.27-3.17
715-725
99.4-99.4
2.99-2.88
2.93-2.89
Heating
504
35
1000
2.4
—
2.95-2.89
645-655
99.4-98.5
2.67-2.60
3.53-3.48
MSC-C09SV - E1
Single phase
220-230V,50Hz
10
0.17
35
93.6-89.5
—
0.17
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
9
5
3
10
10
MUH-C09SV - E1
Single phase
220-230V,50Hz
1,620-1,668
10
—
22
0.28-0.29
RE-174VGSHT
800
C-R 3.31
C-S 6.01
RA6V23-EA
WHT-BLK 258
BLK-RED 385
780o540o255
33
47
620-645
1
0.80
350 (NEO22)
33.18
Cooling
474
36
950
2.5
1.1
4.33-4.18
935-955
98.2-99.3
4.05-3.89
2.58-2.53
Heating
504
35
1000
3.0
—
4.05-3.96
885-905
99.3-99.4
3.77-3.67
3.26-3.19
MSC-C12SV - E1
Single phase
220-230V,50Hz
10
0.19
40
95.7-91.5
—
0.19
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
10
5
3
10
10
MUH-C12SV - E1
Single phase
220-230V,50Hz
1,656-1,704
10
—
34
0.36-0.37
RE-231VHSHT
1100
C-R 2.26
C-S 4.07
RA6V33-CA
WHT-BLK 176
BLK-RED 413
780o540o255
38
49
700-720
1
1.20
620 (NEO22)
33.18
Cooling
588
39
1020
3.4
1.6
5.78-5.73
1220-1240
95.9-94.1
5.42-5.36
2.70-2.66
Heating
642
39
1100
4.0
—
5.87-5.87
1240-1270
96.0-94.1
5.51-5.50
3.13-3.05
Electrical data
Fan motor
Special remarks
Compressor Electrical
data
Fan motor
Special remarks
Capacity
Coefficient of performance(C.O.P)
Outdoor unit power supply
Capacity
NOTE: Test conditions are based on ISO 5151 (Refrigerant piping length (one way): 5m)
Cooling : Indoor DB27°C / WB19°C Heating : Indoor DB20°C
: Outdoor DB35°C / WB24°C : Outdoor DB 7°C / WB 6°C
OB250-1qxp 3/3/00 2:07 PM Page 5

6
Indoor model
Function
Indoor unit power supply
Air flow(Hi)
Power outlet
Running current
Power input
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Air direction
Sound level (Hi)
Fan speed (Hi)
Fan speed regulator
Thermistor RT11(at25:)
Thermistor RT12(at25:)
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(R-407C)
Refrigerating oil (Model)
Thermistor
RT61(at0:)
K/h
A
A
W
%
A
A
"
mm
kg
dB
rpm
k"
k"
kW
R/h
K/h
A
A
W
A(kW)
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
k"
MSH-C18SV - E1
Single phase
220-230V,50Hz
756
15
0.25
55
100.0-95.7
—
0.25
RA4V27-EF
WHT-BLK 184
BLK-RED 250
1,015O320O190
14
5
42
1,180
4
10
10
MUH-C18SV - E1
—
2,142-2,196
15
—
55
0.39
PE-36VPEHT
1,600
C-R 1.06
C-S 2.03
RA6V50-OG
WHT-BLK 116
BLK-RED 111
850o605o290
54
52
810-828
1
1.70
1100 (NEO22)
33.18
Cooling
5.1
2.5
9.44-9.34
2,035-2,085
98.0-97.1
9.05-8.95
2.44-2.38
Heating
5.4
—
9.17-9.12
1,975-2,035
97.9-97.0
8.78-8.73
2.66-2.58
Electrical data
Fan motor
Special remarks
Compressor Electrical
data
Fan motor
Special remarks
Capacity
Coefficient of performance(C.O.P)
Outdoor unit power supply
Capacity
NOTE: Test conditions are based on ISO 5151 (Refrigerant piping length (one way): 5m)
Cooling : Indoor DB27°C / WB19°C Heating : Indoor DB20°C
: Outdoor DB35°C / WB24°C : Outdoor DB 7°C / WB 6°C
OB250-1qxp 3/3/00 2:07 PM Page 6

7
NOISE CRITERIA CURVES
3
MSH-C18SV - E1
MUH-C12SV - 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
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions, Cooling : DB 27: WB 19:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
42
SPL(dB(A)) LINE
Hi
NOTCH
HEATING
Heating : DB 20: WB - :
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 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions, Cooling : DB 35: WB 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
49
SPL(dB(A)) LINE
Hi
NOTCH
HEATING
Heating : DB 7: WB 6:
MUH-C07SV -
MUH-C09SV - E1
E1
MUH-C18SV - 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
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions, Cooling : DB 35: WB 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
47
SPL(dB(A)) LINE
Hi
NOTCH
HEATING
Heating : DB 7: WB 6:
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 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions, Cooling : DB 35: WB 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
45
SPL(dB(A)) LINE
Hi
NOTCH
HEATING
Heating : DB 7: WB 6:
OB250-1qxp 3/3/00 2:08 PM Page 7

8
WIRING DIAGRAM
4
MSC-C07SV - MSC-C09SV - MSC-C12SV - E1E1E1 MODELS WIRING DIAGRAM
SYMBOL
SR141
TB
SYMBOL
MV
NR11
RT11
RT12
SYMBOL
C11
F11
HIC1
MF
NAME NAME NAME
INDOOR FAN CAPACITOR
FUSE(3.15A)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
CIRCUIT BREAKER
SR141 C11
RED
WHT
3
6
5
BRN
YLW
GRY
BLK
4
3
2
1
MF
121
CN
1
2
3
111
CN
112
CN RT12
RT11
NR11
HIC1
TRANS
F11
ELECTRONIC CONTROL P.C. BOARD
CN211
TAB12
CN201
3
2
1
CN202
2
1
LD101T
151
CN
55
BRN
RED
BLU
WHT
BLK
BLU
BRN
TB
L
3
N
2
1
12V
TO OUTDOOR
UNIT
CONNECTING
POWER
SUPPLY
CORD
~/N 220-230V
50Hz
GRN/YLW
POWER MONITOR,
RECEIVER
P.C.BOARD
REMOTE
CONTROLLER
MV
PE
INDOOR 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 MODELS WIRING DIAGRAM
OUTDOOR UNIT
SYMBOL
TB1,TB2
X62
21S4
52C
SYMBOL
MC
MF
NR61
RT61
SR61
SYMBOL
C1
C65
DSAR
F61
IC881
NAME NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
CONTACTOR
CIRCUIT BREAKER
POWER SUPPLY
~/N
220-230V
50Hz
12V
3
4
WHT
BLK
RED
MF
N
4
3
2
1
RT61
CN730
F61
SR61
GRN/YLW
3
R
S
C
WHT
RED
BLK
BLU C1
52C
MC
21S4
3
2
1
BLK BLK
CN721
X62
C65
TAB20
CN661
BLU CN711
DEICER P.C. BOARD
BRN
BLK
RED
DSAR
BRN
TB2
N
FROM
INDOOR UNIT
CONNECTING
TB1
PE
L
IC881
TRANS
X62
NR61
MUH-C07SV - MUH-C09SV - MUH-C12SV - E1E1E1
NOTE: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.
/: Terminal block, : Connector
OB250-1qxp 3/3/00 2:08 PM Page 8

9
MUH-C18SV - E1 MODEL WIRING DIAGRAM
OUTDOOR UNIT
CN720
52C
1
X62
21S4
CN721 MF
SR61
MC
WHT
WHT
WHT
VLT
VLT
COM
52C
TAB21
DSAR
ORN
WHT
WHT RED
RED
RED
WHT
BLU
BLU
RED
BLK
CN730
C65
DEICER P.C.BOARD
RT61
F61
IC881
X62
CN711
BLK
TRANS
TAB20
BLK
R
C
C1
FROM
INDOOR UNIT CONNECTING
GRN/YLW
12V TB
220-230V~
N
2
3
4
1
4
3
2
1
BLK
BLK
CN661
NO
NR61
S
3
2
NAME NAME NAME
SYMBOL
C1
C65
DSAR
F61
IC881
SYMBOL
TB
X62
21S4
52C
SYMBOL
MC
MF
NR61
RT61
SR61
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
DC/DC CONVERTER
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
VARISTOR
DEFROST THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
REVERSING VALVE COIL RELAY
REVERSING VALVE COIL
CONTACTOR
NOTE: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.
/: Terminal block, : Connector
MSH-C18SV - E1 MODEL WIRING DIAGRAM
INDOOR UNIT
PE
CIRCUIT BREAKER
50Hz
CORD
POWER
SUPPLY
~/N 220-230V
F11
NR11
TRANS
HIC1
12V
220-230V~
DSAR
BRN
GRN/YLW
LD1
DISPLAY
P.C.BOARD
RECEIVER
P.C.BOARD
33
101 102
CN CN
1
TO OUTDOOR
UNIT
CONNECTING
N
BLU
GRN/YLW MV
151
CN
5
BLU 3
BLU
ELECTRONIC CONTROL P.C BOARD
REMOTE
CONTROLLER
3
BLU
BLU
RED
2
1
F12
2WHT
BRN
BRN
L
3
TB
CN201 CN211
121
CN
112
CN
3
4
RT11
BRN
YLW
RED
GRY
WHT
BLK
RT12
52C
IC141
C11
1
2
4MF
111
CN
SYMBOL
RT12
TB
52C
SYMBOL
IC141
MF
MV
NR11
RT11
SYMBOL
C11
DSAR
F11
F12
HIC1
NAME NAME NAME
INDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
THERMAL FUSE(93:)
DC/DC CONVERTER
HYBRID IC
INDOOR FAN MOTOR(INNER FUSE)
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
TERMINAL BLOCK
CONTACTOR
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
OB250-1qxp 3/3/00 2:08 PM Page 9

10
Unit:mm
MSC-C12SV - E1 MUH-C12SV - E1
INDOOR UNIT OUTDOOR UNIT
(with heat insulator)
(with heat insulator)
Refrigerant pipe [12.7
(Option) Reversing valve
Muffler
Stop valve
(with service port)
Strainer
Refrigerant pipe [6.35
(Option)
Stop valve
Capillary tube
[3.0x[1.6x800
Check
valve
Refrigerant flow in cooling
Refrigerant flow in heating
Defrost
thermistor
RT61 Outdoor
heat
exchanger
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12
Capillary tube
[3.0x[1.8x250
Flared connection
Flared connection
Compressor
Indoor
heat
exchanger
Reversing valve coil
heating ON
cooling OFF
MSC-C07SV -
MSC-C09SV - E1
E1 MUH-C07SV -
MUH-C09SV - E1
E1
INDOOR UNIT OUTDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
(with heat insulator)
Refrigerant pipe [9.52
(Option)
Muffler
Reversing valve
Defrost
thermistor
RT61
Strainer
Outdoor
heat
exchanger
Capillary tube
[3.0x[1.4x800
(2 pcs)
Capillary tube
[3.0x[1.6x600(MUH-C07SV)
[3.0x[1.6x400(MUH-C09SV)
Capillary tube
[3.0x[1.4x600(MUH-C07SV)
[3.0x[1.4x550(MUH-C09SV)
Check valve
Strainer
Refrigerant pipe [6.35
(Option)
(with heat insulator) Refrigerant flow in cooling
Refrigerant flow in heating
Unit:mm
Stop valve
(with service
port)
Indoor coil
thermistor
RT12
Reversing valve coil
heating ON
cooling OFF
Capillary tube
[3.0x[1.4x500(2pcs)
Flared connection
Flared connection
Compressor
Stop valve
Strainer
REFRIGERANT SYSTEM DIAGRAM
5
OB250-1qxp 3/3/00 2:08 PM Page 10