Panasonic CS-XE9PKUA - Manual (Page 61)

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15.4.7 H23 / H24 (Indoor Pipe Temperature Sensor Abnormality)
Malfunction Decision Conditions
š 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
š Faulty connector connection.
š Faulty sensor.
š Faulty PCB.
Troubleshooting