LG LDE4413ST Service Manual page 63

Door Lock System Failure,F10
or F20 ?
Plug in the unit
Note :
Just after self-clean start, the door lock motor
starts to rotate.
During this time if the door lock switch does
NOT operate properly after rotating twice, then
supervising circuit detects a Door Lock failure and
the F10 or F20 error code appears.
1
Check the operation of door
lock motor.
Press Lower Clear/Off button
for 3 seconds.
and try to open the door.
Does the door open?
Door lock icon turns on.
No
It is normal.
Check the wiring
TROUBLESHOOTING
Yes
Go to No 2
Unplug the unit
2
Is the Connector disconnected
or loose?
Check the following:
(1) Between Main PCB and
Relay PCB (CN51)
(2) Electric wiring CN52 and CN53 of relay PCB
(3) Electric wiring of Locking Motor and Micro Switch
(4) Electric wiring of CN60 and CN61 of Main PCB
CN52
CN53
No
7-11
Reconnect.
Yes
If defective harness,
replace or fix
CN61
CN60