Samsung EF fault code meaning
Samsung / EF
Series: MOSCON-F7
Forward/Reverse Run Commands Input Together
AC drive
Meaning: Both the forward and Reverse Run Commands have been ON for more than 0.5 s. | Check the sequence of the forward and Reverse Run Commands. Since the rotational direction is unknown, the motor will be decelerated to a stop when this minor fault occurs.
Possible causes
Source: