Mitsubishi Electric MSC-C07TV User manual

SERVICE MANUAL
SPLIT-TYPE,AIR CONDITIONERS
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································7
4. NOISE CRITERIA CURVES·······························9
5. OUTLINES AND DIMENSIONS························11
6. WIRING DIAGRAM ··········································13
7. REFRIGERANT SYSTEM DIAGRAM··············15
8. PERFORMANCE CURVES······························18
9. MICROPROCESSOR CONTROL ····················35
10. SERVICE FUNCTIONS·····································45
11. TROUBLESHOOTING······································48
12. DISASSEMBLY INSTRUCTIONS·····················59
13. PARTS LIST······················································65
Wireless type
Models
MSC-C07TV - (WH) · MU-C07TV -
MSC-C09TV - (WH) · MU-C09TV -
MSC-C12TV - (WH) · MU-C12TV -
MSC-C07TV - (WH) · MUH-C07TV -
MSC-C09TV - (WH) · MUH-C09TV -
MSC-C12TV - (WH) · MUH-C12TV -
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
No. OB269
MSC-C07TV -
MSC-C09TV -
MSC-C12TV - E1
E1
E1
HFC
utilized
R407C

2
TECHNICAL CHANGES
MSC-C07SV - ➔MSC-C07TV -
MSC-C09SV - ➔MSC-C09TV -
MSC-C12SV - ➔MSC-C12TV -
1. Rated voltage has changed to 230V.
2. Remote controller has changed.
• Slide switch for setting the type has added on the remote controller.
Indoor units for MU type and MUH type are common specifications.
Set slide switch on the remote controller according to the type of outdoor unit.
E1E1
E1E1
E1E1
1
MU-C07TV -
MU-C09TV -
MU-C12TV -
New model
MUH-C07SV - ➔MUH-C07TV -
1. Rated voltage has changed to 230V.
2. Path of heat exchanger has changed.
3. Refrigerant filling capacity has changed.(0.85kg ➔0.90kg)
4. Capillary tube has changed.({3.0X{1.6X600 ➔{3.0X{1.6X750, {3.0X{1.4X600 ➔{3.0X{1.4X700)
5. Temperature of defrosting control has changed.
6. Additional refrigerant charge has been changed.(50g/m ➔25g/m)
MUH-C09SV - ➔MUH-C09TV -
1. Rated voltage has changed to 230V.
2. Outdoor heat exchanger has changed.
3. Refrigerant filling capacity has changed.(0.80kg ➔1.00kg)
4. Capillary tube has changed.
({3.0X{1.6X400 ➔{3.0X{1.8X400, {3.0X{1.4X550 ➔{3.0X{1.4X650, {3.0X{1.4X800 X2 ➔{3.0X{1.4X500 X2)
5. Outdoor fan motor has changed.(RA6V23-EA➔RA6V33-CA)
6. Temperature of defrosting control has changed.
7. Additional refrigerant charge has been changed.(50g/m ➔25g/m)
MUH-C12SV - ➔MUH-C12TV -
1. Rated voltage has changed to 230V.
2. Path of heat exchanger has changed.
3. Refrigerant filling capacity has changed.(1.20kg ➔1.25kg)
4. Capillary tube has changed.({3.0X{1.8X250, ➔{3.0X{1.8X400)
5. High pressure protection temperature has changed.
6. Temperature of defrosting control has changed.
7. Additional refrigerant charge has been changed.(50g/m ➔25g/m)
E1E1
E1E1
E1E1
E1
E1
E1
Slide switch
H C
Type
The position
of the slide
switch
COOL ONLYCOOL & HEAT
H C

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])
R407C
R22
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
R407C
R32: R125: R134a (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
R22
HCFC22 (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 CFC11
w2 :Global Warmth Parameter : based on CO2
INFORMATION FOR THE AIR CONDITIONER WITH R407C REFRIGERANT
This room air conditioner adopts HFC refrigerant (R407C) which will never destroy the ozone layer.
Pay attention to following points.
1Take sufficient care not to allow water and other contaminations to enter the R407C refrigerant during storage and
installation, since it is more susceptible to contaminations than HCFC (R22) refrigerant.
2Clean refrigerant pipings should be used.
3Composition change may occur in R407C 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.

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. In this case, ability of the refrigerating cycle decreases or normal
operation can be impossible.
If liquid refrigerant is rapidly charged at once, the compressor may be locked.
NOTE: 1. The R407C is mixed refrigerant which consist of three different kinds of evaporative temperature. As a result, the
R407C occurs the change of composition.
2. Additional refrigerant charge has been changed by change of refrigerant.(R22 ➔R407C)
R22 : <MU-type> 15g/m ➔R407C : <MU-C07/C09/C12TV> 15g/m
R22 : <MUH-type> 50g/m ➔R407C : <MUH-C07/C09/C12TV> 25g/m
Electronic scale for
refrigerant charging
Refrigerant
gas cylinder
operating
valve
Refrigerant gas cylinder
for R407C 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 R407C refrigerant
The following tools are required for R407C refrigerant. Some R22 tools can be substituted for R407C tools.
Do not use tools that are used with R22 refrigerant in order to avoid mixing oils.
R407C tools Can R22 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.
Use the electronic control scale for measuring the R407C.
No
No
No
Yes
Yes
New
New
Gauge manifold
Charge hose
Torque wrench
Flare tool
Vacuum pump
adapter
Electronic scale for
refrigerant charging

5
PART NAMES AND FUNCTIONS
2
INDOOR UNIT
MSC-C07TV -
MSC-C09TV -
MSC-C12TV - E1
E1
E1
Emergency operation switch
Operation section
Horizontal vane
Air filter
Deodorizing filter
(gray sponge type)
Vertical vanes
Air inlet
Grille
Remote control
receiving section
Remote controller
Display section
(when the grille is open)
Operation indicator lamp
Receiving section
Air cleaning filter
(white bellows type)
Front panel
Air inlet
Piping
Drain hose
Air outlet
Drain outlet
(back and side)
OUTDOOR UNIT
MU-C07TV -
MU-C09TV -
MU-C12TV - E1
E1
E1 MUH-C07TV -
MUH-C09TV -
MUH-C12TV - E1
E1
E1
ACCESSORIES
1
5
1
2
2
1
1
1
1
1
1
2
3
4
5
6
7
8
9
0
Installation plate
Installation plate fixing screw 4 x 25 mm
Remote controller mounting hardware
Fixing screw for 33.5 x 16 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
Deodorizing filter
Air cleaning filter
Refrigeration oil
<Indoor unit>
1
2
1
2
Drain socket
Drain cap [33
<Outdoor unit : MUH type only>
MSC-C07TV -
MSC-C09TV -
MSC-C12TV - E1
E1
E1
MUH-C07TV -
MUH-C09TV -
MUH-C12TV - E1
E1
E1

6
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
DRY
PM
CLOCK
AM
RESET CLOCK
HEAT
/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 CONTROL button
CLOCK SET button
MSC-C07TV -
MSC-C09TV -
MSC-C12TV - E1
E1
E1

7
SPECIFICATION
3
Indoor model
Function
Indoor unit power supply
Air flow(High)
Power outlet
Running current
Power input
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Air direction
Sound level(High)
Fan speed(High)
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(R407C)
Refrigerating oil (Model)
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
MSC-C07TV - E1
Single phase
230V,50Hz
10
0.17
35
90
—
0.17
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
9
5
3
10
10
MU-C07TV - E1
Single phase
230V,50Hz
10
695
—
RE-130VGSHT
650
C-R 4.18
C-S 5.76
RA6V23-EB
WHT-BLK 258
BLK-RED 385
780o540o255
32
45
645
1
0.77
350 (NEO22 )
Cooling
474
36
950
2.25
0.8
1686
3.03
99
18
2.75
0.29
3.08
MSC-C09TV - E1
Single phase
230V,50Hz
10
0.17
35
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
9
5
3
10
10
MU-C09TV - E1
Single phase
230V,50Hz
10
—
RE-145VGSHT
700
C-R 4.03
C-S 5.71
RA6V23-EB
WHT-BLK 258
BLK-RED 385
780o540o255
32
45
645
1
0.88
350 (NEO22 )
Cooling
474
90
—
0.17
36
950
2.5
1.0
1686
3.53
795
98
19
3.25
0.29
3.01
MSC-C12TV - E1
Single phase
230V,50Hz
10
0.19
40
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
10
5
3
10
10
MU-C12TV - E1
Single phase
230V,50Hz
1914
10
6.01
—
0.37
RE-231VHSHT
1100
C-R 2.25
C-S 4.07
RA6V33-CB
WHT-BLK 176
BLK-RED 413
780o540o255
34
49
725
1
0.90
620 (NEO22)
Cooling
588
92
—
0.19
39
1020
3.55
1.6
1330
96
34
5.64
2.59
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 JIS C 9612.
Cooling : Indoor DB27°C / WB19°C
Outdoor DB35°C / WB24°C

8
Indoor model
Function
Indoor unit power supply
Air flow(High)
Power outlet
Running current
Power input
Power factor
Starting current
Fan motor current
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Air direction
Sound level(High)
Fan speed(High)
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(R407C)
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-C07TV - E1
Single phase
230V,50Hz
10
0.17
35
90
—
0.17
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
9
5
3
10
10
MUH-C07TV - E1
Single phase
230V,50Hz
1686
10
—
99
18
0.29
RE-135VGSHT
650
C-R 4.18
C-S 5.76
RA6V23-EA
WHT-BLK 258
BLK-RED 385
780o540o255
34
47
645
1
0.90
350 (NEO22)
33.18
Cooling
474
36
950
2.2
0.7
3.23
735
2.95
2.86
Heating
504
35
1000
2.5
—
2.93
675
2.65
3.52
MSC-C09TV - E1
Single phase
230V,50Hz
10
0.17
35
90
—
0.17
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
9
5
3
10
10
MUH-C09TV - E1
Single phase
230V,50Hz
1914
10
—
22
0.37
RE-174VGSHT
800
C-R 3.30
C-S 5.80
RA6V33-CA
WHT-BLK 176
BLK-RED 413
780o540o255
36
49
720
1
1.00
350 (NEO22)
33.18
Cooling
474
36
950
2.55
1.0
3.83
875
99
3.46
2.80
Heating
504
35
1000
3.2
—
4.13
925
97
3.76
3.33
MSC-C12TV - E1
Single phase
230V,50Hz
10
0.19
40
92
—
0.19
RC4V19-BA
WHT-BLK 292
BLK-RED 325
850O278O191
10
5
3
10
10
MUH-C12TV - E1
Single phase
230V,50Hz
1914
10
—
34
0.37
RE-231VHSHT
1100
C-R 2.25
C-S 4.07
RA6V33-CA
WHT-BLK 176
BLK-RED 413
780o540o255
39
49
720
1
1.25
620 (NEO22)
33.18
Cooling
588
39
1020
3.45
1.5
5.71
1240
94
5.34
2.70
Heating
576
39
1000
4.2
—
6.01
1310
95
5.64
3.11
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 JIS C 9612.
Cooling : Indoor DB27°C / WB19°C Heating : Indoor DB20°C
Outdoor DB35°C / WB24°C Outdoor DB 7°C / WB 6°C

9
NOISE CRITERIA CURVES4
MSC-C07TV -
MSC-C09TV - E1
E1 MSC-C12TV - E1
MU-C07TV -
MU-C09TV - E1
E1 MU-C12TV - 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 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27:Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
High
NOTCH
36
SPL(dB(A)) LINE
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 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 35:Wet-bulb temperature 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
High
NOTCH
45
SPL(dB(A)) LINE
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 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
Test conditions,
Cooling : Dry-bulb temperature 27:Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20:
High
NOTCH
39
SPL(dB(A)) LINE
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 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 35:Wet-bulb temperature 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
High
NOTCH
49
SPL(dB(A)) LINE

10
MUH-C07TV - E1
MUH-C09TV - E1
MUH-C12TV - 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 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Heating : Dry-bulb temperature 7:Wet-bulb temperature 6:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
High
NOTCH
47
SPL(dB(A)) LINE
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 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Heating : Dry-bulb temperature 7:Wet-bulb temperature 6:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
49
SPL(dB(A)) LINE
NOTCH
High
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 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Heating : Dry-bulb temperature 7:Wet-bulb temperature 6:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
49
SPL(dB(A)) LINE
NOTCH
High