LG LFXS29766 Series Service Manual page 43

Freezer Fan Error (Er IF)
1 Reset the unit and
Input Test1 Mode.
(Push the button 1 time)
2
Open the f reezer door and Check
the air f low. Windy?
Yes
Go to 4
3
Check the Fan motor.
Rotate f an using hand.
It f eel sticky?
Fan Motor
4
Check the Fan Motor voltage
Is Fan Motor voltage 11.4~12.6V?
No Go to 3
5
Check the Fan Motor voltage
Is Fan Feed Back voltage 0V, 5V?
6
Change the
Yes
Fan motor
Check the Fan Motor voltage
Is Fan Feed Back voltage 0V, 5V?
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TEST MODE 1 Voltage [V]
CON7
11.4~12.6V
3 rd pin & 5 th pin
Yes
TEST MODE 1 Voltage [V]
CON7
Not 0V, 5V
1 st pin & 5 th pin
No
TEST MODE 1 Voltage [V]
CON7
Not 0V, 5V
7 th pin & 5 th pin
No
7
Explain to customer
Replace
No
Main PCB
Change the
Yes
motor
Replace
Yes
Main PCB