Panasonic CS-E9SD3UAW Service Manual page 75

15.5.4 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 t he 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
68 104 140
Temperature (
YES
YES
176 212 248 284
o
F)
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
75