Panasonic CS-C120TE / CS-C180TE / CS-C240TE / CU-C120TE / CU-C180TE / CU-C240TE Service Manual ▷ View online
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CS-C120TE
2. Diagnosis methods of a malfunction of a compressor
Nature of fault
Insufficient compressing of a
compressor
compressor
Locked compressor
Symptom
1. Relationship between the condition of the air conditioner and pressure and
electric current
Cooling Mode
Condition of the air
conditioner
Insufficient refrigerant
(gas leakage)
(gas leakage)
Clogged capillary tube
or Strainer
or Strainer
Short circuit in the
indoor unit
indoor unit
Heat radiation defi-
ciency of the outdoor
unit
ciency of the outdoor
unit
Inefficient
compression
compression
Low Pressure
●
Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is
started.
●
Electric current during operation becomes approximately 20% lower than the
normal value.
normal value.
●
The discharge tube of the compressor becomes abnormally hot (nor-
mally 70 to 90
mally 70 to 90
°
C).
●
The difference between high pressure and low pressure becomes
almost zero.
almost zero.
●
Electric current reaches a high level abnormally, and the value exceeds the
limit of an ammeter. In some cases, a breaker turns off.
limit of an ammeter. In some cases, a breaker turns off.
●
The compressor is a humming sound.
Troubleshooting Guide
Electric current during operation
High Pressure
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CS-C120TE
Technical Data
L
L
L
L
L
Thermostat characteristics
L
L
L
L
L
Operation characteristics
Cooling characteristics – Outdoor temperature
Conditions: Room Temperature; 27°C (D.B.T.)
Cooling operation; at High Fan
CS-C120T
Outside Air Temp. (°C)
I: Current (A)
LP: Gas Side Piping
Pressure (MPa)
T: Outlet Air
Temp. (°C)
30
28
26
24
22
20
20
22
24
26
28
30
32
Cooling ON
1.5°C
Cooling OFF
Intake air
temperature °C
Temperature setting
CS-C240T
CS-C180T
T: Outlet Air
Temp. (°C)
LP: Gas Side Piping
Pressure (MPa)
I: Current (A)
Outside Air Temp. (°C)
T: Outlet Air
Temp. (°C)
LP: Gas Side Piping
Pressure (MPa)
I: Current (A)
Outside Air Temp. (°C)
Q: Cooling
Capacity (kw )
(I)
11.2
(LP)
13.3
15.4
(A)
0.505
0.515
0.525
(MPa)
3.16
3.51
3.86
(kw)
14.0
15.0
16.0
(°C)
(Q)
(T)
30
35
40
(I)
12.0
(LP)
13.3
14.6
(A)
0.475
0.485
0.495
(MPa)
6.20
6.89
7.57
(kw)
10.9
11.0
11.1
(°C)
(Q)
(T)
30
35
40
Q: Cooling
Capacity (kw)
Q: Cooling
Capacity (kw)
(I)
9.3
(LP)
10.3
11.3
(A)
0.495
0.505
0.515
(MPa)
4.27
5.13
5.99
(kw)
11.9
12.0
12.1
(°C)
(Q)
(T)
30
35
40
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CS-C120TE
CS-C120T
CS-C180T
CS-C240T
CS-C180T
CS-C240T
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Exploded View
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CS-C120TE
Exploded View
CU-C180T
CU-C240T
CU-C240T
CU-C120T
CU-C120T
CU-C180T
CU-C240T
CU-C180T
CU-C240T
Untitled-6
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23
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