To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.
Make sure the directional valve has power.
Make sure the cord to the directional valve is connected to the correct port and the cord is not damaged.
The directional valve will need to be replaced.
The hydraulic power pack will need repair.
Replace encoder.
Reset coupler per specifications and retighten set screws.
Retighten or replace supply tube.
Replace motor.