LG Multi V CRUN Series Service Manual page 229

Fault diagnosis and Trouble shooting guide
Display
Title
code
24
High pressure
Trouble shooting Flow
Does indoor/outdoor
Is the ventilation of
heat exchanger
Does high pressure
switch operate at the
detection of high
pressure switch
Check whether pipe is blocked
and refrigerant state
Meaning
Compressor off has occurred
3 times in1 hour
fan operate?
Yes
smooth?
Yes
power off?
Yes
Is the circuit for
normal?
Yes
Cause of error
• Malfunction of high pressure switch
• Fan lock of indoor or outdoor unit
• Obstacles of indoor or outdoor heat exchanger
• Blocking in discharge pipe of compressor
No
Check and replace the fan
and its drive part
No
Remove the obstacles
material from heat exchanger
No
Replace high power switch
No
Replace PCB
Self-diagnosis function
Service Manual 229