Panasonic CS-NE9NKE Service Manual page 77

15.4.19 H98 (Indoor High Pressure Protection)
Error Code will not display (no Timer LED blinking) but store in EEPROM
Malfunction Decision Conditions
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During heating operation, the temperature detected by the indoor pipe temperature sensor is above 60°C.
Malfunction Caused
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Clogged air filter of the indoor unit
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Dust accumulation on the indoor unit heat exchanger
•
Air short circuit
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Detection error due to faulty indoor pipe temperature sensor
•
Detection error due to faulty indoor unit PCB
Troubleshooting
77