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Self-Diagnosis Feature
Code
Description
No.
21
DC Peak (IPM Fault)
22
CT 2 (Max CT)
23
DC Link Voltage is low
24
High Pressure / Low Pressure switch activated
25
Voltage is too low or too high
26
Problem in DC Compressor positioning
27
PSC Fault
28
DC Link Voltage is high
29
High current at Compressor phases
32
Temperature at discharge-pipe is too high
37
The pressure ratio is too high
40
Problem in CT sensor
41
Problem in discharge-pipe temperature sensor
44
Problem in ambient temperature sensor
45
Problem in condenser-pipe temperature sensor
46
Problem in suction-pipe temperature sensor
52
Bad communication between internal PCBs
53
Bad communication between unit and Outdoor unit
60
EEPROM Checksum mismatched
61
Temperature at condenser-pipe is too high
62
Temperature at heatsink is too high
63
Temperature at condenser-pipe is too low
65
Problem in heatsink temperature sensor
73
Instant over current input
Error indicator (outdoor PCB)
Outdoor unit error
Ex) Error 21 (DC Peack)
2 Times
LED01G
(RED)
1 Sec.
1 Time
LED02G
(GREEN)
2 Sec.
CAUTION
Precaution in service or check
Even after stopping the operation of product, it takes some time to discharge the remaining electricity of the electrolytic
capacitor that was charged early. Before conducting a checking or repairing job, pull out the plug out of the outlet and
make sure that the lamp on the control board outdoor unit is off.
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Slight
Trouble
2 Times
2 Times
1 Sec.
1 Sec.
1 Time
1 Time
2 Sec.
- 48 -
Classification
Unit
Heavy
Option
Error
Trouble
Trouble
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
O
Outdoor
LED Blinking
LED1 (Red) LED2 Green)
1 time
2 times
3 times
4 times
5 times
2 times
6 times
7 times
8 times
9 times
2 times
3 times
7 times
none
1 time
4 times
4 times
5 times
6 times
2 times
5 times
3 times
none
1 time
6 times
2 times
3 times
5 times
3 times
7 times
LGE Internal Use Only
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