Read Panasonic CW-C72KD / CW-C92KD Service Manual online
4.2. CW-C72KD
Item
Pressure (MPa)
Temperature (°C)
A
1.86 ~ 2.06
70 ~ 85
B
1.81 ~ 2.01
31 ~ 41
C
0.59 ~ 0.66
8 ~ 14
D
0.54 ~ 0.59
13 ~ 21
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB).
35°C (DB), 24°C (WB).
4.3. CW-C92KD
Item
Pressure (MPa)
Temperature (°C)
A
1.96 ~ 2.22
71 ~ 89
B
1.91 ~ 2.06
35 ~ 45
C
0.56 ~ 0.63
7 ~ 12
D
0.50 ~ 0.56
6 ~ 14
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB).
35°C (DB), 24°C (WB).
4 Refrigeration Cycle Diagram
4.1.
5 Air Conditioner Performance Evaluation
Intake & Discharge Air
Temperature Difference
Current Drain
Determination
Remedy
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8°C and over (14.4°F)
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•
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As specified.
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Nothing wrong.
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None.
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8°C and over (14.4°F)
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•
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Higher than specified.
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•
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Nothing wrong, outdoor
temperature is too high, heat
radiation is not efficient.
temperature is too high, heat
radiation is not efficient.
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•
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Improve heat radiation.
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Under 8°C (14.4°F)
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•
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Higher than specified.
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•
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Something is preventing heat
radiation.
radiation.
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Excessive amount of refrigerant.
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Improve heat radiation.
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Under 8°C (14.4°F)
•
•
•
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Lower than specified.
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•
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Leakage of refrigerant or
refrigerant system is blocked.
refrigerant system is blocked.
•
•
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Locate repair leak.
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Flush refrigeration cycle.
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Under 8°C (14.4°F)
•
•
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Higher than specified by
50%.
50%.
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Compressor defect.
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•
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Replace the compressor.
Note: Room air humidity is relatively higher, the temperature difference will be smaller.
6 Troubleshooting Guide
Warning: Disconnect unit from electrical power supply before making any electrical checks.
Trouble
Check
Result
Cause
Remedy
Fan Motor and Compressor
won’t run.
won’t run.
•
•
•
•
Supply Voltage
•
•
•
•
Fuse Box or Circuit
Breaker.
Breaker.
•
•
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Power cord or
Wiring Harness.
Wiring Harness.
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Thermostat Setting.
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Less than 10% by
Rated.
Rated.
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Open Contacts.
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Pulled loose or
Shorted.
Shorted.
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Higher than room
temp.
temp.
•
•
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Temporary or Permanent?
•
•
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Customer Restarted unit
immediately without waiting
3 minutes.
immediately without waiting
3 minutes.
•
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•
Consult ELECTRICIAN, If
permanent.
permanent.
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Repair Open Circuit.
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WAIT FOR 3 MINUTES.
•
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Repair or Replace it.
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Set it LOWER.
4
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