LG GR-L208NN Service Manual page 85

Problems Causes
Sound "Burping" It happens when refrigerant expands - Check the sound of refrigerant at the
(almost the same at the end of capillary tube.
as animals crying
sound).
Water boiling or It happens when refrigerant passes
flowing sound. orifice in accumulator internal pipes by
the pressure difference between
condenser and evaporator.
Sound of whistle When door closes, the internal pressure
when door of the refrigerator decreases sharply
closes. below atomosphere and sucks air into
the refrigerator, making the whistle
sound.
Checks
initial installation.
- Check the sound when the refrigerator
starts operation after forced defrosting. - If it is continuous and servere, insert
- Check the restrainer attachment
conditions on the evaporator and
capillary tube weld joints.
- Check the sound when compressor is
turned on.
- Check the sound when compressor is
turned off.
- Check the sound by opening and
closing the refrigerator or freezer doors.
Measures
- Check the restrainer attached on the
evaporator and capillary tube weld
joints and attach another restrainer.
capillary tube again (depth:15±3mm)
- Fasten the capillary tube to suction
pipes or detach in the compressor
compartment.
- Explain the principles of freezing
cycles.
- Explain the principles of freezing cycles
and refrigerant flowing phenomenon by
internal pressure difference.
- If sound is servere, wrap the
accumulator with foam and restrainer.
- Broaden the cap of discharge hose for
defrosting in the compressor
compartment.
- Seal the gap with sealant between out
and inner cases of hinge in door.
Remarks