LG AUUQ18GH2 - Page 23

Error Code Description
LED
(Red)
LED
(Red)
Indoor
status
LED 1
(Red)
LED 2
(Green)
21 DC Peak(IPM Fault)
2times ◑ 1time ◑
OFF
22 Max. CT(CT2)
2times ◑ 2times ◑
OFF
23 DC Link Low Volt.
2times ◑ 3times ◑
OFF
24 Pressure switch/Heater Sink.
2times ◑ 4times ◑
OFF
26 DC Comp Position Error
2times ◑ 6times ◑
OFF
27 PFC Fault Error
2times ◑ 7times ◑
OFF
29 Comp Over Current
2times ◑ 9times ◑
OFF
32 D-Pipe High(Inv.)
3times ◑ 2times ◑
OFF
40 CT Sensor(Open/Short)
4times ◑
0 OFF
41 Inv. D-Pipe Th Error(Open/Short)
4times ◑ 1time ◑
OFF
43 Pressure Sensor(Open/Short)
4times ◑ 3times ◑
OFF
44 Outdoor air Th Error(Open/Short)
4times ◑ 4times ◑
OFF
45 Cond. Middle Pipe Th Error(Open/Short)
4times ◑ 5times ◑
OFF
51 Capacity over
5times ◑ 1times ◑
OFF
53
Communication Error(Indoor ÷ Outdoor)
5times ◑ 3times ◑
OFF
60 EEPROM Error(Outdoor)
6times ◑
0 OFF
61 Cond. Middle Pipe High
6times ◑ 1times ◑
OFF
62 Heatsink Error(High)
6times ◑ 2times ◑
OFF
65 Heatsink Th Error(Open/Short)
6times ◑ 5times ◑
OFF
67 BLDC motor fan lock(Outdoor)
6times ◑ 7times ◑
OFF
If abnormal voltage is supplied, the protection circuits will turn off the product in order to prevent
the component damage. The product will automatically restart after 3 minutes.
23
SELF-DIAGNOSIS FUNCTION
ENGLISH