LG GA-B409U QA Series - Refrigerating Cycle; Troubleshooting Chart; Leakage Detection

-16-
CAUSE
STATEOF
THESET
TEMPERATURE
OFTHE
COMPRESSOR
STATEOFTHE
EVAPORATOR
REMARKS
PARTIAL
LEAKAGE
WHOLE
LEAKAGE
PARTIAL
CLOG
WHOLE
CLOG
MOISTURE
CLOG
COMP-
RESSION
NOCOMP-
RESSION
LEAKAGE
CLOGGED BY
DUST
DEFECTIVE
COMPRESSION
Freezerroomand
Refrigeratordon'tcool
normally.
Freezerroomand
Refrigeratordon'tcool
normally.
Freezeroomand
Refrigeratordon'tcool
normally.
Freezerroomand
Refrigeratordon't
cool.
Coolingoperation
stopsperiodically.
Freezerand
Refrigeratordon't
cool.
Nocompressing
operation.
LowflowingsoundofRefrigerant
isheardandfrostformsininlet
only.
FlowingsoundofRefrigerantis
notheardandfrostisn'tformed.
FlowingsoundofRefrigerantis
heardandfrostformsininlet
only.
FlowingsoundofRefrigerantis
notheardandfrostisn'tformed.
FlowingsoundofRefrigerantis
notheardandfrostmelts.
LowflowingsoundofRefrigerant
isheardandfrostformsininlet
only.
FlowingsoundofRefrigerantis
notheardandnofrost.
Alittlehighmorethan
ambienttemperature.
Equaltoambient
temperature.
Alittlehighmorethan
ambienttemperature.
Equaltoambient
temperature.
Lowthanambient
temperature.
Alittlehighthan
ambienttemperature.
Equaltoambient
temperature.
• A little Refrigerant discharges.
• Normal cooling is possible
when injecting of Refrigerant
the regular amount.
• No discharging of Refrigerant.
• Normal cooling is possible
when injecting of Refrigerant
the regular amount.
• Normal discharging of
refrigerant.
• The capillary tube is faulty.
• Normal discharging of
Refrigerant.
• Cooling operation restarts
when heating the inlet of
capillary tube.
• The pressure of high pressure
part in compressor is low.
• No pressure of high pressure
part in the compressor.
YES
YES
WhetherCompressor
runsornot.
Whetherfrost
formsornotin
Evaporator
.
Observethedischarged
amountofRefrigerant.
InjectRefrigeranttoCompressor
andcheckcoolingoperation.
Cloggedbydust. Gasleakage.
Faulty
Compressor.
MoistureClog.
Whetheroil
leaksornot.
Frostformednormally
Normalamount
Noormuchamount
(Checktheleakagepoint)
Frostformednormally
Nofrost
orforms
ininletonly
CheckCompressor
5.REFRIGERATINGCYCLE
TroubleshootingChart
LeakageDetection
• Observedischargingpointofrefrigerantwhichmaybeintheoildischargingpartinthecompressorandholeofevaporator.
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