LG LRSC21934SW, Service Manual

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TROUBLE
D
IAGNOSIS
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1
01
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Problems Symptom Causes Checks Measures Remarks
Defective Buzzer rings Trouble mode indication. Check trouble diagnosis function. Repair troubles Refer to mode
display button. but key does indication in
not sense even function
button is explanations.
pressed.
Door Buzzer Buzzer Defective connecting lead wire from Check lead wire associated with door Repair lead wire. Check model
continuously main PCB to door switch. switch. with dispenser.
rings or door Defective freezer compartment door Refer to door switch in parts repair Replace Freezer
opening alarm switch parts. guide. compartment door
does not work. switch.
Bad water/ice Ice and water Defective connecting lead wire from Check Lead Wire associated with lever Repair lead wire.
dispenser. are not Main PCB to lever switch. switch with a tester.
dispensed. Defective lever switch parts Refer to door switch in parts repair guide. Replace lever switch.
Defective photo coupler IC parts. Check voltage change at photo coupler Replace photo
output terminals with lever switch coupler IC or PCB.
pressed. It is OK if voltage change is
between 0V - 5V.
Defective relay associated with ice Check relay (RY4, RY5, RY12) Replace defective
dispense (geared motor, cube and with a tester. relay.
dispenser solenoid).
Defective parts associated with ice Check resistance of parts with a tester. Replace defective
dispense (geared motor, cube and parts.
dispenser solenoid).
Defective relay associated with water Check relay (RY7) with a tester Replace defective
dispense. relay.
Defective parts associated with water Check resistance of parts with a tester. Replace defective
dispenser. parts.