LG GR-L28AK Series Service Manual page 24

Icing Room Sensor Error
Is Er-IS displayed?
Yes
Is the connection loose?
Display PWB
No
Disconnect CON101 and
measure the value. Is
resistance value between
pins 5 & 6 of CON101 as
below? (BL to BL)
pin1 BL
pin2 BL
Icing room Sensor
Resistance
Test Point Result
pin5 To pin6 1.4 ~ 120
Yes
Yes Reconnect
Inner of Icing door
Replace the
No
Icing-Sensor
(Position
No : 600B)
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Is resistance value between
pins 1 & 2 of Housing- A as
below? (BL to BL)
pin2 BL
pin1 BL
Checking Open or Short
of wire
Test Point Result
(1) To (2) 1.4 ~ 120
Yes
Reconnect and Power ON
If the ER-IS appears when
you press FREEZER key and
ICE PLUS Key at the same
time, Replace Display PWB.
(Position No : 501A)
Otherwise, explain to the
customer!
Replace the
No
Icing-Sensor
(Position
No : 600B)