LG LFXS26973 Series Service Manual page 37

Freezer Fan Error (FF E)
1 Reset the unit and
Input Test1 Mode.
(Push the button 1 time)
2
Open the freezer door and Check
the air flow. Windy?
Yes
Go to 4
3
Check the Fan motor.
Rotate fan using hand.
It feel sticky?
Fan Motor
No Go to 3
Change the
Yes
Fan motor
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4
Check the Fan Motor voltage
Is Fan Motor voltage 12V?
TEST MODE 1
CON7
8 pin ~ 5 pin
th th
Yes
5 Check the Fan Motor voltage
Is Fan control signal voltage
between 0V and 5V?
TEST MODE 1
CON7
6 pin ~ 5 pin
th th
No
Check the Fan Motor voltage
6
Is Fan feed back voltage
between 0V and 5V?
TEST MODE 1
CON7
7 th pin ~ 5 th pin
No
7 Explain to customer
Replace
No
Main PCB
CON3
Voltage [V]
12V
Replace
No
Main PCB
CON3
Voltage [V]
0V<Voltage<5V
Replace
No
Motor
CON3
Voltage [V]
0V<Voltage<5V