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Simrad Autopilot AP26 is getting Rudder Failure error code...

Discussion in 'Electronics' started by Dan DeHart, Aug 10, 2021.

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  1. Dan DeHart

    Dan DeHart New Member

    Joined:
    Apr 22, 2021
    Messages:
    3
    Location:
    Bellaire, TX
    Recently bought a twin diesel 2004 Cruisers 370 Express and when I turn on the AP it powers up and seems to work for a minute or less, then I get a "Rudder Failure" error message. The hydraulic pump is moving the rudders before the error message, so don't think it is the motor. I am wondering if it might be the rudder feedback device? Ideas or comments, please. Thanks.
  2. Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    9,827
    Location:
    Satsuma, FL
    On power on, it assumes the feedback unit is there, but when it moves the rudder and no change in feedback value, it logs the error.
    Depending on the box, you can emulate the feedback by compass angle on the bow. Not a real pretty line but better than nothing.
    Check that the feedback tie rod is connected. This is the usual failure if it's not installed correctly.
  3. v10builder1

    v10builder1 Senior Member

    Joined:
    Sep 22, 2012
    Messages:
    36
    Location:
    Centreville/Kent Narrows, MD
    Also check/redo the connecti0ns from the rudder feedback unit (RFU) at the AP computer. It is a twisted pair under screw terminals at the AP computer IIRC, if not re-seat the connector a few times.