Condenser Fan Error - LG LFX28977ST/01 Service Manual

Condenser Fan Error

Is Er-CF displayed?
Yes
Is the connection loose?
No
Reset and
Enter the TEST 1 MODE
Is the output voltage
between pin12 and pin13 of
CON4 like as below?
Pin12 PK Pin13 WH/RD
Condenser Fan Voltages
Test Point Result
pin12 To pin13 10 ~ 16 V
Yes
Yes Reconnect
Replace
No
MAIN PWB
(Position No
: 500A)
- 31 -
Is the condenser fan
rotate under Test1 mode?
Yes
Is the feedback voltage
between pin13 and pin14
of CON4 like as below?
(from motor to main board)
Pin13
WH/RD
Pin14 SB
Feedback Voltages
Test Point Result
Pin13 To pin14 1 ~ 4 V
Yes
Explain to the customer!
Check fan motor
No
(Connector,
Locked, mouse)
and replace.
(Position No :
420A)
Replace
No
MAIN PWB
(Position No :
500A)