LG Multi V CRUN Series Service Manual page 228

Self-diagnosis function
Fault diagnosis and Trouble shooting guide
Display
Title
code
23
DC link
Trouble shooting Flow
Is the starting relay
Is the connection of
R,S,T input power
Is the voltage of DC
Check and replace the PCB
228 Trouble Shooting Guide
Meaning
DC charging is not
performed for 45 sec. after
starting relay turn on (initial
charging is under 320VDC)
normal?
Yes
normal?
Yes
link normal?
Yes
• Poor connection on DC link terminal
• Malfunction of starting relay
• Malfunction of capacitor
• Abnormal in R,S,T connection
• Malfunction of IPM
• Malfunction of detection PCB
No
Check and replace PCB and
starting relay
No
Repair the connection
No
Check and replace IPM and
capacitor
Cause of error