Upper Lamp Of Operation Indicator Lamp	Abnormal point (Failure mode)	Condition
Not lighted	Normal	None (Normal)
1-time flash every 0.5 second	Room temperature thermistor	Room coil temperature thermistor is short/open circuit
2-time flash, 2.5 second OFF	Indoor coil thermistor	Indoor coil temperature thermistor is short/open circuit
3-time flash, 2.5 second OFF	Serial signal	Rotation frequency feedback signal is not emitted during the indoor fan operation
4-time flash, 2.5 second OFF (Inverter only)	Indoor fan motor	Indoor PCB failure
5-time flash, 2.5 second OFF (Inverter only)	Indoor control system	Compressor stops after 3 times of over-current / start-up failure protection within 1 minute after start-up
6-time flash, 2.5 second OFF (Inverter only)	Outdoor thermistors	Outdoor thermistor is short / open circuit
7-time flash, 2.5 second OFF (Inverter only)	Outdoor control system	Indoor / outdoor PCB failure
11-time flash, 2.5 second OFF	Indoor fan motor	Rotation frequency feedback signal is not emitted during 12 seconds the indoor fan operation
14-time flash, 2.5 second OFF	Refrigerant circuit	Unit has been pump down for a long time Refrigerant amount is low Unit is short cycling Outdoor fan motor locks up