LG LSC27990TT Service Manual page 53

TROUBLE DIAGNOSIS
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
3. Poor Cooling
4) No cooling air circulation.
Faultyfan motor. Fan is Fanshroudcontact. - Clearance.
constrained. Damping evaporatorcontact.
Accumulated residual f rost.
Small coolingair Insufficient
discharge, motorRPM
Faultyfan.
Fanoverload. - Fan misuse.
Badlowtermperature RPMcharacteristics.
Ratedpowermisuse.
Lowvoltage.
Fanmisuse.
Badshape.
Looseconnection. - Nottightlyconnected.
Insertdepth.
Shorud. Bent.
Iceandforeignmaterials on rotatingparts.
5) Compressor capacity. Ratingmisuse.
Smallcapacity.
Lowvaitage.
6) Refrigerant • Malfunction of charging cylinder.
too much or too little. _ Wrongsettingof refrigerant.
L Insufficient compressor. - Faultycompressor.
7) Continuous operation
- No contact of temperature controller. - Foreign materials.
8) Damper opens continuously.
Foreign materials Adiabatics liquiddump
jammed. TheEPS (styrofoam _R) driptrayhassediment i n it.
A screwor otherforeignmaterial h asfallenintothe drip
trayor damper.
Failed sensor. - Position of sensor.
Characteristics Bad characteristics of its own temperatue.
of damper. Parts misuse.
Charge of temperature - Impact.
characteristics.
9) Food storing place. - Near the outlet of cooling air.
• Check visually after
disassembly.
• Check visually after
disassembly.
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