LG LSC27990TT Service Manual page 52

TROUBLE DIAGNOSIS
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
3. Poor Cooling
Residual
frost.
Weakheatfrom heater. SheathHeater- rated.
Tooshortdefrosting time. Defrost S ensor.
- Faultycharacteristics.
Seat-D(missing, l ocation, t hickness).
Structural f ault. Gasketgap.
Air inflowthroughthe fan motor.
Badinsulation ofcasedoor.
No automaticdefrosting.
Defrostdoes not return.
3) Cooling air leak.
Badgasket adhestion r Gap.
Badattachment.
u Contraction.
Doorsag. • Badadhesion.
w Weakbindingforceathinge.
4) No cooling air circulation.
Faultyfan motor. Fanmotor. Selflocked.
Wireiscut.
Badterminal c ontact.
Doorswitch. Faults. Contact d istance.
Buttonpressure.
Meltedcontact.
Contact.
Refrigerator a ndfreezerswitchreversed.
Buttonis not pressed. Poordoor
attachment.
Doorliner
(dimension).
Contraction inner
liner.
Misalignment.
Badterminal
connection.
Adiabatics liquid
leak.
• Check the fan motor
conduction: OK.
No conduction: NG.
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