EB1241 is refrigerant fill. FF means that you have reached the end of the codes.

Hook a gauge to the high-side connector to see if the value matches the display #7 when running at about 1500RPM, controls set on LO, fan on high, and all the windows open.

If the gauge agrees with #7 but is too low, you need refrigerant. If the gauge is higher than what you read at #7, you either have a bad sending unit or a restriction at the condenser or receiver/dryer.