F50 - Lift UP solenoid error
F52 - Lift DN solenoid error
F55 - Tilt FW solenoid error
F57 - Tilt BW solenoid error

In all cases there are harness connection checks, check all your connections, plugs etc.
Look for inline diodes and check those also, or if there is a diode board inline check the diode board.

Also it does not mention this but i would also check the seat switch, in most cases if the seat switch does not activate it will not allow the hydraulic functions work and if you select a hydraulic function while in this condition it will more than likely show an error.