Panasonic CS-PS9JKT Service Manual page 56

14.4.13 H98 (Indoor High Pressure Protection)
Error Code will not display (no Timer LED blinking) but store in EEPROM
Malfunction Decision Conditions
•
During heating operation, the temperature detected by the indoor pipe temperature sensor is above 60°C.
Malfunction Caused
•
Clogged air filter of the indoor unit
•
Dust accumulation on the indoor unit heat exchanger
•
Air short circuit
•
Detection error due to faulty indoor pipe temperature sensor
•
Detection error due to faulty indoor unit PCB
Troubleshooting
When abnormality indication starts again
Check the air passage
Is there any short circuit?
Check the indoor unit air filter
Is the air filter dirty?
Check the dust accumulation on the indoor unit heat exchanger
Is the indoor unit heat exchanger dirty?
Check the indoor pipe temperature sensor
Does it conform to the sensor characteristic chart?
NO
NO
56
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
YES
•
Provide sufficient air passage
YES
•
Clean the air filter
YES
•
Clean the indoor unit heat exchanger
NO
•
Replace the indoor pipe temperature
sensor
•
Replace the indoor unit PCB