Panasonic CS-VZ9SKE Service Manual page 132

17.4.31 F97 (Compressor Over-temperature Protection)
Troubleshooting
Check for bad connection of the compressor temperature sensor connector.
Check for the characteristics of the compressor temperature sensor.
Refer to the characteristic table for electronic circuit diagram.
(Remove the connector and check the resistance value of the sensor.)
Is the compressor abnormally hot when it stops?
Check the gas pressure during the rated cooling operation.
Check for presence of gas leak.
Diagnosis Procedures and Cause
No abnormality is observed
No abnormality is observed
Compressor is abnormally hot
Lower than the normal value
There is a gas leak
Disconnection/
Imperfect connection
of the connector
An abnormality
is observed
Compressor is not
abnormally hot
Higher than the
normal value
There is no gas leak
132
Measures to be Taken
Fix the problem.
Replace the compressor temperature
sensor.
Replace the outdoor unit control board.
Replace the compressor.
Replace the capillary tube or expansion
valve.
Replace the part from which gas is
leaking.