Icing Room Fan Error - LG LFX28977ST/01 Service Manual

Icing Room Fan Error

Is Er-IF displayed?
Yes
Is the connection loose?
No
Reset and
Enter the TEST 1 MODE
Is the output voltage
between pin9 and pin10 of
CON4 like as below?
Pin9 RD Pin10 BL
Icing Fan Voltages
Test Point Result
pin9 To pin10 10 ~ 16 V
Yes
Does the cold-air come out
of the side duct under the
Test1 Mode?
Reconnect
Yes
Is the feedback voltage
between pin10 and pin11
Replace
No
of CON4 like as below?
MAIN PWB
(from motor to main board)
(Position
No : 500A)
Pin10 To pin11
Explain to the customer!
- 32 -
Yes
Pin10 BL
Pin11 BN
Feedback Voltages
Test Point Result
1 ~ 4 V
Yes
Check fan motor
No
(Connector,
Frozen,Locked)
and replace.
Replace
No
MAIN PWB
(Position No :
500A)