(DG11) Autopilot Display Reading Hard Starboard when rudder centered

I updated my autopilot to a Raymarine EV100 last year. Worked perfectly. This winter I had the Seastar hydraulic ram replaced (the old one was leaking). The steering works fine but the helm display shows 30 degrees starboard rudder angle when the rudder is centered. I tried going through the set up again but the problem persists (the position of the rudder angle sensor wasn't changed when the new ram was put in and the ram/ tiller arm are parallel when rudder is amidships.

Any thoughts on how to correct this?

Thanks.

Carl