LG APUW100LFT0 Installation Manual page 31

Error
Description
Code
21 DC Peak (IPM fault) Error
22 CT2 Error (Input of Over-Current)
23 DC Link Error (High/Low DC Voltage)
26 DC Comp Position Detection Error
27 PSC/PFC Over-Current Error (HW)
29 Comp Phase Over-Current Error
32 Discharge Pipe Overheating Error (INV Comp)
35 Low Pressure Drop
41 Discharge Pipe Sensor Error (INV Comp)
43 Pressure Sensor Error
44 Air Sensor Error
45 Cond. Mid-pipe sensor error
46 Suction Pipe Sensor Error
48 Cond. Out-Pipe Sensor Error
51 Over-Capacity Connection Error
52 Communication Error between Main PCB Inverter PCB
53 Communication Error between Outdoor Device Indoor Device
54 Open and Reverse Phase Error
60 EEPROM Check Sum Error
61 Outdoor Device Pipe Overheating Error
62 Heat-sink Overheating Error
65 Heat-sink Sensor Error
Outdoor BLDC Fan Lock Error
67
refer to Outdoor fan PCBA Error Table
73 PSC/PFC Over-Current Error (SW)
SELF-DIAGNOSIS FUNCTION
Error Display
7 segment Red LED Green LED
2 times ◑ 1 time ◑ 10 times within 1h
CH 21
2 times ◑ 2 times ◑
CH 22
2 times ◑ 3 times ◑
CH 23
2 times ◑ 6 times ◑ 10 times within 1h
CH 26
2 times ◑ 7 times ◑ 10 times within 1h
CH 27
2 times ◑ 9 times ◑ 10 times within 1h
CH 29
3 times ◑ 2 times ◑
CH 32
3 times ◑ 5 times ◑
CH 35
4 times ◑ 1 time ◑
CH 41
4 times ◑ 3 times ◑
CH 43
4 times ◑ 4 times ◑
CH 44
4 times ◑ 5 times ◑
CH 45
4 times ◑ 6 times ◑
CH 46
4 times ◑ 8 times ◑
CH 48
5 times ◑ 1 time ◑
CH 51
5 times ◑ 2 times ◑
CH 52
5 times ◑ 3 times ◑
CH 53
5 times ◑ 4 times ◑
CH 54
6 times ◑
CH 60 -
6 times ◑ 1 time ◑
CH 61
6 times ◑ 2 times ◑
CH 62
6 times ◑ 5 times ◑
CH 65
6 times ◑ 7 times ◑ 10 times within 1h
CH 67
7 times ◑ 3 times ◑
CH 73
31
Operation
Count
State
Stop
Infinite restart Stop
Infinite restart Stop
Stop
Stop
Stop
Infinite restart Stop
Infinite restart Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
1 time within 1h Stop
Infinite restart Stop
Infinite restart Stop
1 time within 1h Stop
Stop
Infinite restart Stop