B&G auto course comp/control head

During survey with boat in the hard, B&G auto course comp/ control head would power up but not engage wheel movement with +1 / +10 or -1 / -10 request.

does the system require fluid compass/speed inputs to work?  Eg. On the water sea trial... 

main system is H3000

B&G ACP-1 course comp

Raymarine linear drive type 2S


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