Defrost Heater Error - LG LFX28977ST/01 Service Manual

Defrost Heater Error

Is Er-dH displayed?
Yes
Is the connection loose?
CON6
CON3
No
Reconnect
Yes
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Enter the TEST 3 MODE
Is the voltage value between
pins 10 (BO) and 2 (BL) of
CON3 115 V AC?
Pin10 BO Pin2 BL
Relay operation
Test Point Result
pin2 To pin10 115V
Yes
Reset TEST3 MODE(Normal)
Is the voltage value between
pins 10 (BO) and 2 (BL) of
CON3 0 V AC?
pin10 BO pin2 BL
Relay Open
Test Point Result
Reset/Norm OP 0 ~ 2 V
Yes
Replace
MAIN PWB
No
(Position No
: 500A)
Replace
MAIN PWB
No
(Position No
: 500A)