Panasonic cs-s9pkv Service Manual page 109

15.4.16 H98 (Indoor High Pressure Protection)
Error Code will not display (no Timer LED blinking) but store in EEPROM
Malfunction Decision Conditions

The temperature detected by the indoor pipe temperature sensor is abnormal.
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
109