LG GR-L28AK Series Service Manual page 23

Defrost Sensor Error
Is Er-dS displayed?
Yes
Is the connection loose?
No
Power Off
Tip : To protection of MICOM
Disconnect CON6 and
measure the value. Is
resistance value between
pins 7 & 8 of CON6 as
below? (BN to BN)
pin7 pin8
Test Point Result
Pin7 to pin8 6 ~ 300
Yes
Yes
Reconnect
Replace
No
D-sensor
(Position
No : 400A)
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Is resistance value between
pins 1 & 2 of Housing- A as
below? (BO to BO)
pin1
pin2
Checking Open or Short
of wire
Test Point Result
Pin1 To pin2 6 ~ 300
Yes
Reconnect and Power ON
If the ER-dS appears when
you press FREEZER key and
ICE PLUS Key at the same
time, Replace the main
PWB.(Position No : 500A)
Otherwise, explain to the
customer!
Replace
No
D-sensor
(Position
No :400A)