10. Troubleshooting
10.1 Indoor unit error code explanation:
PREMIER series +OASIS series+9A series +R series +12F series +Aurora series:
Operation lamp flash times
Indoor EEPROM malfunction
Indoor / outdoor units communication error
Indoor fan speed has been out of control
Open or short circuit of T1 temperature sensor
Open or short circuit of T2 temperature sensor
Open or short circuit of T4 temperature sensor
Open or short circuit of T3 temperature sensor
Open or short circuit of T5 temperature sensor
Outdoor EEPROM parameter error
Outdoor fan speed out of control
Open or short circuit of T2B temperature sensor
Inverter compressor drive protection
Low pressure protection(Just matching with
M4OA-36HFN1-Q,M4OD-28HFN1-Q,M5OC-36HF
N1-Q, M5OD-42HFN1-Q)
O (light) X (off) ☆ (flash)
Light Commercial series(Except Console)
Open or short circuit of T1 temperature sensor
Open or short circuit of T2 temperature sensor
Indoor / outdoor units communication error
Indoor EEPROM malfunction
Open or short circuit of T3 or T4 temperature sensor or
Outdoor EEPROM malfunction
Outdoor fan speed has been out of control
Indoor fan speed has been out of control
Outdoor unit over-current protection
Inverter compressor drive protection
☆ Flash(at 2.5Hz) ◎ Flash(at 0.5Hz) O light X(off)
Note: Digital display is only available for A5 duct type.