Is there anything after the F?
Press the pause cancel button twice to clear the display. Make sure water supply is turned on(hot and cold). Set the unit to hot/cold and try it. If it works, hit pause cancel again to drain the unit and then try it with cold/cold. Let me know what you find out.
The error code you gave me is letting you know that it did not sense water coming into the washer for 30 seconds. This could be several things including a mild confusion of the board. A big load could have caused this to happen by soaking up all of the water coming in at first and not registering in the water level indicator.