Panasonic CS-Z20XKEW Service Manual page 123

18.4.7 H23 (Indoor Pipe Temperature Sensor 1 Abnormality)
Malfunction Decision Conditions

During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger
temperature sensor are used to determine sensor errors.
Malfunction Caused

Faulty connector connection.

Faulty sensor.

Faulty PCB.
Troubleshooting
Check the indoor air temperature sensor:
•
Plug out connector from the indoor unit PCB
•
Measure the resistance of the indoor intake air
temperature sensor
Is the measured resistance of the indoor intake air
temparature sensor matches the value specified in its
charactetistic chart?
•
Defect in indoor intake air temperature sensor
•
Replace the indoor intake air temperature
sensor
•
Defect in indoor unit PCB
•
Replace the indoor unit PCB
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