Panasonic CS-VZ9SKE Service Manual page 118

17.4.17 H80 (Aluminium Electric Heater (Heatcharge) 3-Way Valve Sensor Abnormality)
Troubleshooting
Check sensor connection abnormality
Check sensor characteristics
Check the resistance of the sensor
 In some the models for the heat exchanger temperature sensor, the sensor has been soldered
directly to the board rather than the connector connection.
For that case, please change the system PCB.
Diagnosis Procedures and Cause
Normal
Normal
Not Connected
Abnormal
118
Measures to be Taken
Re-connect the connector
Replace the sensor
Replace the PCB