LG LSC27990TT Service Manual page 65

2-6. Icing
Problems Causes
Icing in the 1) Bad circulation of cool air.
refrigerator - Clogged intake port in the
compartment. refrigerator compartment.
- Damper icing. - Sealing is not good.
- Pipe icing. - Too much food is stored and clogs
- Discharging the discharge port.
pipe icing. - Bad defrosting.
2) Faulty door or refrigerator
compartment.
- Faulty gasket.
- Faulty assembly.
3) Overcooling in the refrigerator
compartment.
- Faulty damper in the refrigerator
compartment.
- Faulty MICOM (faulty sensor)
4) Bad defrosting
- Heater wire is cut.
- Defective defrost sensor.
- Defrosing cycle.
5) Customers are not familiar with
this machine.
- Door opens.
- High temperature, high moisture,
and high load.
Checks
- Check if food is stored properly
(check if discharge and intake port
are clogged).
- Check icing on the surface of
baffle and cool air path (pipe) after
dissembling the container box.
- Check icing at intake ports of
freezer and refrigerator
compartment.
- Check gasket attached conditions.
- Check door assembly conditions.
- Check if refrigerator compartment
is overcooled (when button
pressed on weak).
- Check parts are faulty.
- Check for frost on the evaporator
after dissembling shroud and fan
grille.
- Check for ice on intake port of freezer
and refrigerator compartment.
- Check if food interferes with door
closing.
- Check for ice on the ceilings.
Measures
- Be acquainted with how to use.
- Sealing on connecting parts.
- Check the damper and replace
it if it has defects.
- Check defrost. (After forced
defrosting, check ice in the
evaporator and pipes.)
- Correct the gasket attachment
conditions and replace it.
- Door assembly and replacement.
- Replace faulty parts.
- Check parts related to defrosting.
- Check defrosting. (Check ice on the
evaporator and pipe.)
- Read the manual and become familiar
with the operation of the product.
Remarks
- Check the defrost
related parts if problem
is caused by faulty
defrosting.
- Replacement should
be done when it
cannot be repaired.
- Moisture does not freeze
on the evaporator but
can be sucked into the
refrigerator, where it
condenses and freezes.
This interferes with cold
air circulation and
sublimation of the ice.