74 
14.4.11  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