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Raymarine acu 200 autopilot for yacht is not locking on

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bearing. When you hit auto...
Raymarine acu 200 autopilot for yacht is not locking on bearing. When you hit auto wheel wil swing wildly to port 180 degree then back to starboard and then keep rotating backwards and forwards. Problem started after replacing house batteries for yacht. Tried resetting factory settings via p70.
Adjusting via p70 menu has not resolved issue. Any suggestions to solve problem appreciated.
David
Submitted: 7 months ago.Category: Boat
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Answered in 3 hours by:
12/29/2017
Marine Mechanic: Boat Doc, Boat Enthusiast replied 7 months ago
Boat Doc
Boat Doc, Boat Enthusiast
Category: Boat
Satisfied Customers: 245
Experience: Expert at Just Answer
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H​i, first thing to do is disconnect both the AP and the P70 from power completely. Then unplug and plug back in all connections and look for any hot spots or corrosion. Once it powers back up try and recalibrate again following the menu on the P70. If that doesn't do it, I suspect you may have a bad rudder position sensor, but it makes no sense why that would fail when the batteries were done.

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