Table 2 LED Indication Codes of Outdoor Main Control Board
LED Indication of Outdoor Main Control Board
Display
Indication
Item
LED6 LED5 LED4 LED3 LED2 LED1
DC bus overvoltage protection ON BLINK ON ON ON ON E5
Radiator fin overheat protection ON BLINK ON ON ON BLINK E5
Current sensor fault ON BLINK ON ON BLINK ON E5
Radiator sensor fault ON BLINK ON BLINK ON ON E5
Compressor current protection ON BLINK ON BLINK ON BLINK E5
DC bus undervoltage protection ON BLINK ON BLINK BLINK ON E5
Compressor startup failure ON BLINK OFF ON ON ON E5
PFC abnormal ON BLINK OFF ON ON OFF E5
Compressor clogged ON BLINK OFF ON ON BLINK E5
IPM module resetting ON BLINK OFF ON OFF ON E5
Loss-of-synchronization of compressor motor ON BLINK OFF ON OFF OFF E5
Inverter phase-failure or loss-of-regulation ON BLINK OFF ON OFF BLINK E5
Communication fault from inverter to main
controller
ON ON OFF OFF OFF BLINK E5
IPM module protection ON BLINK BLINK ON ON ON E5
Compressor overspeed ON BLINK BLINK ON ON OFF E5
Sensor connection protection ON BLINK BLINK ON ON BLINK E5
Temperature shift protection ON BLINK BLINK ON OFF ON E5
C current protection (input side) ON BLINK ON BLINK ON OFF E5
Inverter ambient sensor fault ON BLINK ON BLINK OFF ON E5
High pressure protection ON BLINK OFF OFF OFF BLINK E1
Low pressure protection ON BLINK OFF OFF BLINK OFF E3
Exhaust protection ON BLINK OFF OFF BLINK BLINK E4
Overload protection of compressor ON BLINK OFF BLINK OFF OFF E5
Communication fault (indoor / outdoor unit,
manual controller)
ON BLINK OFF BLINK BLINK OFF E6
Outdoor ambient sensor fault ON BLINK BLINK OFF OFF OFF F3
Outdoor coil middle sensor fault ON BLINK BLINK OFF BLINK OFF F2
Inverter exhaust temp. fault ON BLINK BLINK BLINK OFF BLINK F4
Defrost (not fault) ON BLINK OFF BLINK BLINK BLINK Defrost
Oil return (not fault) ON BLINK BLINK BLINK ON BLINK No display
Indoor and outdoor unit incompatible ON BLINK OFF BLINK ON BLINK No display
Note: No indicator LED6 for ASGE-18AI.
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