LG Multi V CRUN Series Service Manual page 231

Fault diagnosis and Trouble shooting guide
Display
Title
code
Discharge
temperature
32
(inverter
compressor)
Trouble shooting Flow
Does discharge
temperature really
rise?
Yes
Is indoor/outdoor
LEV normal?
Yes
Does liquid
Injection operate
normally?
Yes
Is the amount of
additive refrigerant
normal?
Yes
Check leakage of refrigerant
Meaning
Due to over rising of
inverter compressor
discharge temperature,
Compressor off has occurred
3 times in 1 hour
No
No
Check and replace
LEV
No
Check liquid SV
No
Add refrigerant
Self-diagnosis function
Cause of error
• Abnormal of sensor for detecting temperature of
discharge gas from compressor
• Malfunction of circuit for detection of temperature
of discharge gas from compressor
• Shortage of refrigerant
• Malfunction of LEV
Is discharge
temperature
normal ?
Yes
Check and
replace PCB
No
Replace
discharge
temperature
sensor
Service Manual 231