LG Multi V CRUN Series Service Manual page 230

Self-diagnosis function
Fault diagnosis and Trouble shooting guide
Display
Title
code
Low / over
25
voltage
Trouble shooting Flow
Is normal input voltage?
Check and replace PCB
230 Trouble Shooting Guide
Meaning
Input voltage is out of
tolerance of rating voltage
No
Yes
Cause of error
• Abnormal of Input power voltage
• Malfunction of circuit for detection of voltage
Check power supply system