Panasonic CS-E12RB4UW Service Manual page 64

15.4.4 H15 (Compressor Temperature Sensor Abnormality)
Malfunction Decision Conditions

During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor
temperature sensor are used to determine sensor errors.
Malfunction Caused

Faulty connector connection.

Faulty sensor.

Faulty PCB.
Troubleshooting
When abnormality indication starts again.
Check the connector connection:
• Turn off the power.
• Check the connector connection.
Is the connector connection normal?
Check the outdoor compressor temperature sensor:
• Plug out connector from the outdoor unit PCB.
• Measure the resistance of the outdoor compressor
temperature sensor.
Is the measured resistance of the outdoor compressor
temperature sensor matches the value specified in its
characteristic chart?
Compressor Temp. Sensor
(Thermistor) Characteristics
70
60
50
40
30
20
10
0
20 40 60
(68) (104) (140)
Temperature °C (°F)
YES
YES
80 100 120 140
(176) (212) (248) (284)
For safety reason and to prevent component
breakdown, always switch off the power
Caution
before remove and connect the component.
NO
• Connector poor contact.
• Correct the connection.
NO
• Defect in outdoor compressor temperature sensor.
• Replace the outdoor compressor temperature sensor.
• Defect in outdoor unit PCB.
• Replace the outdoor unit PCB.
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