LG ATNH126ELFC Service Manual page 124

Troubleshooting Guide
Troubleshooting CH54
Display
Title
code
54
Phase error
Phase_A
Phase_B
Phase_C
Check Point
1. Check the Main power.
2. Check the connecting state of connector CN_3PHASE on the outdoor pcb ass'y.
124 Synchro Air Conditioner
Cause of error
• Phase change
U V
5.3 msec
1 1 1
0 0 1
1 0 0
Check point & Normal condition
• Check the Main power
• Check the CN_PHASE connector
W
0 0 0
1 1 0
0 1 1