Refrigeration Cycle Diagram; Air Conditioner Performance Evaluation - Panasonic CW-C180BN Service Manual

REFRIGERATION CYCLE DIAGRAM

CW-C180BN
CW-C240SN
5
1 Compressor
2 Condenser
3 Strainer
4 Capillary Tube
5 Evaporator
6 Accumulator
CW-A180BN
CW-A240SN
3
1 Compressor
2 4-Way Valve
3 Evaporator
4 Capillary Tube
5 Strainer
6 Condenser
7 Accumulator

AIR CONDITIONER PERFORMANCE EVALUATION

COOLING
SUCTION & DISCHARGE AIR
TEMPERATURE DIFFERENCE
8°C and over
8°C and over
Under 8°C
Under 8°C
Under 8°C
HEATING
SUCTION & DISCHARGE AIR
TEMPERATURE DIFFERENCE
12°C and over
12°C and over
Under 12°C
Under 12°C
* Note: Room air humidity is relatively higher, the Temp. difference will be smaller.
3
4
C
B
D
A
6
1
4 5
B
C
2
D
A
1
7
HEATING
COOLING
CURRENT
As specified
Higher than specified
Higher than specified but below
150% of specified
Lower than specified
Higher than 150% of specified
CURRENT
As specified
Higher than specified
Lower than specified
Higher than 150% of specified
ITEM
A
B
C
2
D
* Indoor temp. at 27°C (DB), 19°C (WB) and Outdoor at 35°C , 24°C.
COOLING
ITEM
A
B
C
D
* Indoor temp. at 27°C (DB), 19°C (WB) and Outdoor at 35°C , 24°C.
HEATING
6
ITEM
A
B
C
D
* Indoor temp. at 21°C (DB), and Outdoor at 7°C (DB), 6°C (WB).
DETERMINATION
Nothing wrong
Nothing wrong, outdoor temperature is
too high, heat radiation is not efficient
Something is preventing heat radiation
Leakage of refrigerant or refrigerant
system is blocked
Compressor defect or compressor
capacitor defect
DETERMINATION
• Nothing wrong
• Nothing wrong, outdoor temperature
is high
• Something is preventing heat
radiation at indoor heat-exchanger
• Nothing wrong, outdoor temperature
is too low
• Something is preventing heat
radiation at outdoor heat-exchanger
• Leakage of refrigerant
• Refrigerant system is blocked
• Compressor defect
• Compressor capacitor defect
– 5 –
CW-C180BN
2
PRESSURE (kg/cm ) TEMP. (°C)
17.5 ~ 21.0 75 ~ 90
17.2 ~ 20.7 38 ~ 45
5.5 ~ 6.1 7 ~ 15
5.3 ~ 5.8 5 ~ 15
2
PRESSURE (kg/cm ) TEMP. (°C)
18.5 ~ 22.0 80 ~ 95
18.2 ~ 21.7 44 ~ 52
5.7 ~ 6.3 7 ~ 15
5.5 ~ 6.0 6 ~ 16
2
PRESSURE (kg/cm ) TEMP. (°C)
15.5 ~ 19.0 55 ~ 70
4.0 ~ 4.5 0 ~ 5
15.0 ~ 18.5 37 ~ 47
15.4 ~ 18.9 45 ~ 55
REMEDY
• None
• Improve heat radiation
• Excessive amount of refrigerant
• Improve heat radiation
• Locate repair leak
• Flush refrigeration cycle
• Replace the compressor or
compressor capacitor
REMEDY
• None
• None
• Clean air-filter
• None
• Improve heat radiation at outdoor
heat-exchanger
• Locate & repair leak
• Flush refrigeration leak
• Replace compressor
• Replace compressor capacitor