LG Universal System Air Conditioner Service Manual page 102

Troubleshooting Guide
13) Troubleshooting CH51, CH60
Display
Title
code
Over capacity
51
Over capacity
60
Model
AUUW368C
AUUW368C1
AUUW428C
AUUW488C
AUUW608C
Check Point
• CH 51
1. Check the indoor unit capacity.
102 Universal System Air Conditioner
Cause of error
• Over capacity
• Check sum error
Max. single indoor unit capacity
40
46
52
65
• CH 60
1. Check the insertion condition of EEPROM.
2. Check the poor soldering
Check point & Normal condition
• Check the indoor unit capacity.
• Check the combination table.
• Check the PCB ASM P/No.
• Check the poor soldering.