LG universal system air conditioner Service Manual page 117

12) Troubleshooting CH51, CH60
Display
Title
code
51
Over capacity
EEPROM
60
Check sum
Model
AUUW126B
AUUW186B
AUUW246B
AUUW306B
AUUW366B
AUUW4860
AUUW6060
Check Point
• CH 51
1. Check the indoor unit capacity.
Cause of error
• Over capacity
Combination
• Check sum error
Gross max. capacity
21k
24k
33k
39k
52k
Check point & Normal condition
• Check the indoor unit capacity.
• Check the combination table.
• Check the PCB ASM P/No.
• Check the poor soldering.
Max. single indoor unit capacity
12k
12K
18K
18K
24K
• CH 60
1. Check the insertion condition of EEPROM.
2. Check the poor soldering
Troubleshooting Guide
Service Manual 117