Excessive Cold Lev - LG multi V PLUS Service Manual

Self-diagnosis function

Excessive Cold LEV.

Start of check.
Is there
temperature
difference between front end
and rear end of subcooling
LEV in cooling
operation?
Yes
Is there
significant temperature
difference between front end
and rear end of subcooling
LEV in heating
operation?
No
No failure of subcooling LEV.
288 Trouble Shooting Guide
No
Is connection of the
PCB terminal normal?
Is signal applied normally
from the PCB?
Check LEV coils and replace
the subcooling LEV.
Yes
Is connection of the
PCB terminal normal?
Is signal applied normally
from the PCB?
Check LEV coils and replace
the subcooling LEV.
No
Reconnect the terminal.
Yes
No
Replace the PCB.
Yes
No
Reconnect the terminal.
Yes
No
Replace the PCB.
Yes