Panasonic CS-VZ9SKE Service Manual page 130

17.4.29 F95 (Overpressure Protection in Case of Cooling Error)
Troubleshooting
Check for clogging and interrupted heat radiation on the outdoor unit heat
exchanger.
Check for bad connection of the connector of the outdoor unit heat
exchanger temperature sensor.
Check for the characteristics of the outdoor unit heat exchanger
temperature sensor.
Refer to the characteristic table for electronic circuit diagram.
(Remove the connector and check the resistance value of the sensor.)
Diagnosis Procedures and Cause
No abnormality is observed
No abnormality is observed
No abnormality is observed
An abnormality
is observed
Disconnection/
Imperfect
connection of
the connector
An abnormality
is observed
130
Measures to be Taken
Fix the problem.
Fix the problem.
Replace the outdoor unit heat
exchanger temperature sensor.
Replace the outdoor unit control board.