Freezer Fan Error - LG LFX28977ST/01 Service Manual

Freezer Fan Error

Is Er-FF displayed?
Yes
Is the connection loose?
No
Reset and
Enter the TEST 1 MODE
Is the output voltage
between pin6 and pin7 of
CON4 like as below?
Pin6 WH Pin7 BO
Freezer Fan Voltages
Test Point Result
pin6 To pin7 12 ~ 16 V
Yes
Does the cold-air come out
of the top of the Grill Fan
under Test1 mode ?
Yes Reconnect
Is the feedback voltage
between pin7 and pin8 of
CON4 like as below?
(from motor to main board)
Replace
No
MAIN PWB
(Position
No : 500A)
Explain to the customer!
- 30 -
Yes
Pin7 BO
pin8 PR
Feedback Voltages
Test Point Result
Pin7 To pin8 1 ~ 4 V
Yes
Check fan motor
No
(Connector,
Frozen, Locked)
and replace.
Replace
No
MAIN PWB
(Position No :
500A)