See also: Kentatsu air conditioners manuals
P4 - evaporator temperature protection
P5 - condenser temperature protection
P7 - discharge temperature is too high, compressor protection is on
P9 - the outside temperature is too low, when increased, the protection will turn off automatically
P10 - output pressure protection
P11 - suction pressure protection
P12 - overcurrent protection
E1 - internal temperature sensor T1 closed / torn off
E2 - evaporator temperature sensor T2 closed / disconnected
E3 - temperature sensor capacitor T3 closed / broken
E4 - outdoor temperature sensor closed T4 closed / torn
E5 - communication between indoor and outdoor units is broken
E6 - external unit protection
E10 - compressor suction pressure error
E13 - compressor phase error
E14 - incorrect phasing of the compressor
HS - start defrost
E1 - EEPROM error (non-volatile memory on the board)
E2 - zero crossing error
E3 - abnormal fan speed
E4 - compressor current protection has been activated 4 times
E5 - indoor temperature sensor closed / torn off
E6 - evaporator temperature sensor closed / broken
P4 - thermal protection of the evaporator of the indoor unit
P5 - thermal protection of the capacitor of the external unit
P9 - Defrost or Comfort Airflow Protection
E1 - open or short circuit of the temperature sensor circuit T1
E2 - evaporator temperature sensor T2 closed / disconnected
E3 - temperature sensor capacitor T3 closed / broken
E6 - outdoor unit protection
E0 - faulty room temperature sensor
E1 - the evaporator temperature sensor is faulty
E2 - faulty outdoor unit temperature sensor
E3 - outdoor unit defective
E4 - defective drainage pump temperature sensor
E5 - EEPROM error
E6 - water level rise
E2 - malfunction of the room temperature sensor.
E3 - malfunction of the evaporator temperature sensor.
E4 - malfunction of the temperature sensor of the outdoor unit.
E6 - malfunction of the outdoor unit (see indicators on the control board of the outdoor unit).
E7 - EEPROM error
E8 - Excess water level.