LG Multi V CRUN Series User Manual

226 Trouble Shooting Guide
Self-diagnosis function
No
No
Is the terminal of
IPM in outdoor unit
normal?
Is the driving
voltage of IPM
normal?
Yes
Yes
Is the IPM normal?
Yes
Replace the IPM
No
Repair the
connection
Check and replace
PCB of outdoor unit
Is the outdoor fan
normal?
Yes
Check the fan
No
Is the compressor
normal?
Replace the
compressor
No
Yes
Is the input voltage
normal?
Yes
Check power supply
system
No
Check whether pipe is blocked and
refrigerant state
Fault diagnosis and Trouble shooting guide
DC Peak
21
• An instant over current in the U,V,W phase of
compressor
• Overheat of IPM for malfunction of heat radiation
• Overcharging of refrigerant
• Poor insulation of compressor
• Low voltage input
• Damage of compressor motor coil.
The protection operation of
inverter compressor driving
device(IPM) for over
current flow into the IPM
Trouble shooting Flow
Title
Display
code
Cause of errorMeaning

LG Multi V CRUN Series Specifications

General

Brand	LG
Model	Multi V CRUN Series
Category	Air Conditioner
Language	English