LG LSC27990TT Service Manual page 50

TROUBLE DIAGNOSIS
CLAIMS.
2. No cooling.
2) Refrigeration system is clogged.
Moisture
clogged.
No electric
power on
thermo-
stat.
Weld joint
clogged.
Drier clogging.
Foreign material clogging.
CAUSES AND CHECK POINTS.
Residual moisture
Air Blowing.
in the evaporator.
Leave it in the air.
Caps are missed.
Not dried in the compressor.
Residual moisture.
Elapsed more than 6 months after drying
Caps are missed.
No pressure when it is open.
Insufficient drier
Dry drier - Drier temperature.
capacity.
Air dry
Check on package
condition.
Good storage after
finishing.
Residual moisture
Caps are missed.
in pipes.
Air blowing.
Moisture penetration - Leave it in the air. - Moisture penetration.
into the refrigeration oil.
Short pipe insert.
Pipe gaps.
Too large.
Damaged pipes.
Too much solder.
The capillary tube inserted depth. - Too much.
Capillary tube melts. - Over heat.
Clogged with foreign materials.
Reduced cross section by cutting. - Squeezed.
Compressor cap is disconnected.
Foreign materials are in the pipe.
- 50 -
I Heat a clogged evaporator to
Not performed.
Too short.
Impossible moisture
confirmation.
Low air pressure.
During rest time.
After work.
During transportation.
During work.
Not performed.
Performed.
Too short time.
Low air pressure.
Less dry air.
I The evaporator does not cool
Desiccant powder.
Weld oxides.
Drier angle.
HOW TO CHECK
check it. As soon as the
cracking sound starts, the
evaporator will begin to
freeze.
from the beginning
(no evidence of moisture
attached).
The evaporator is the same
as before even heat is
applied.