Hi, I have a Autohelm St4000. Recently I have been getting an error code '4001' appearing on the control display. After I have switch the unit on - the normal heading flashes on the screen and then the code 4001 appears plus a short beep on the alarm. What can cause this?
Camping, Backpacking & Hiking - Raymarine - Autohelm Series St1000 Plus & St2000 Tiller Pilots