Error Code E FF

Defect of BLDC fan motor for freezer

Also displayed as: E FF

How to Fix

1. 1

   Power cycle the unit and enter Test Mode 1 (press TEST button once on Main PCB).

2. 2

   Open the freezer door and check for airflow from the fan; if airflow is present and windy, go to step 5.

3. 3

   If no airflow, manually rotate the fan blade by hand. If the fan feels sticky or seized, replace the fan motor.

4. 4

   If fan rotates freely, measure motor supply voltage at CON4 20th Pin to 19th Pin in Test Mode 1; expected 11.4 to 12.6V.

5. 5

   If motor supply voltage is not present (not 11.4–12.6V), replace the Main PCB.

6. 6

   If supply voltage is correct, measure fan feedback voltage at CON4 18th Pin to 19th Pin; expected signal (not 0 or 5V fixed).

7. 7

   If feedback voltage is 0V or 5V (fixed), replace the freezer fan motor.

8. 8

   If feedback is correct, measure PWM voltage at CON4 17th Pin to 19th Pin; expected not fixed 0 or 5V.

9. 9

   If PWM voltage is fixed 0V or 5V, replace the Main PCB.

10. 10

    If all voltages are correct, explain normal operation to customer.