Panasonic WH-ADF0309J3E5CM Service Manual page 284

25.2.37 Outdoor Discharge Pipe Temperature Sensor Abnormality (H30 / F04 / F40)
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
Temperature (ºC)
YES
YES
80 100 120 140
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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