Troubleshooting With Error Display - LG LFC20770SB Service Manual

8.7 Troubleshooting With Error Display

1) Display Error Indication Code (Dot Display Type).
Error Code Indication on Display panel:
? ?
LED OFF
No. ITEM
Abnormal Freezer
1
(1)
Sensor
Abnormal
2
Refrigerator
(1)
Sensor
Abnormal Defrost
3
(1)
Sensor
Abnormal Room
4
Temperature
(2)
Sensor
Abnormal Ice
5
(2)
Maker Sensor
Abnormal Ice
6
(2)
Maker Unit
Unsuccessful
Defrosting
7
(1)
Operation
Freezer Fan BLDC
8 Motor abnormal
(1)
operation
NOTE (1) : Items No. 1, 2, 3, 7 & 8 are considered primary errors, when any of these error is present in
the refrigerator unit, it will be displayed after 3 hours from it occurs. Anyway, if you press ICE PLUS +
FREEZER TEMP keys simultaneously for more than 3 seconds, you can check if any error is present in
the refrigerator unit, regardless if the time to be displayed (3 hours) already has passed or not.
NOTE (2) : Items No. 4, 5 & 6 are considered secondary errors, these error only can be displayed when
you press ICE PLUS + FREEZER TEMP keys simultaneously for more than 3 Seconds.
NOTE (3) : If there is not errors present in the refrigerator unit, and you press ICE PLUS + FREEZER
TEMP keys simultaneously for more than 3 seconds, refrigerator unit will enter to TEST MODE #1 (Check
the section "HOW TO ENTER TO TEST MODES" for reference.
LED ON
ERROR INDICATION
Freezer Notch
REF Notch
All LED OFF
All LED OFF
All LED OFF
All LED OFF
All LED OFF
All LED OFF
All LED OFF
All LED OFF
CONTENTS
Wire open, Short
Circuit, temperature
sensor damaged,
Main PCB
damaged.
Wire open, Short Circuit,
Loose connection, defective
HALL IC, Defective Ice
Maker Motor.
Defrost Sensor does not
reach 8°C during 1 hour after
start the Defrost process.
There is not signal from
BLDC motor during 115
seconds after start BLDC
operation.
- 37 -
REMARKS
Check for loose
connections on
Main PCB,
Damage on wires,
Resistance value of
thermistor
(Temperature
Sensor)
Check for motor stuck,
twisted tray ice, loose
connections on main PCB or
Freezer compartment.
Check M -Fuse, Check for
loose connections on Main
PCB, Check for loose
connections on Freezer
compartment.
Check for motor stuck, Loose
connections on Main PCB
and Freezer compartment,
check for damage on wires.