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Simrad AP28 error

Discussion in 'Technical Discussion' started by Pascal, Sep 12, 2016.

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  1. Pascal, Sep 12, 2016
    #1
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,546
    Location:
    Miami, FL
    couple of days ago, I got a rudder response failure on the AP28 display. At that time, there was rudder movement whatsoever.

    Pulled the brushes on pump motor, they looked ok except for the bottom one being full of dust. Cleaned and reinstalled. Checked the voltage I teh main board terminal and I get voltsge on the pump terminal, +- reversed depending on direction.

    Tested the AP and the pump still doesn't respond trying a turn to starboard but when testing a turn to port, the rudders swing hard over to stbd.

    Trying to figure out if it indeed a bad pump motor or a control board problem.
  2. Capt Ralph, Sep 12, 2016
    #2
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    13,440
    Location:
    Satsuma, FL
    reverse the pump wires. if the motor still will not spin in the other direction (port), then bad motor.
    I'm afraid it's a relay on your board.
    I'm about to rip out a AC42 box tonight my self. Bad internal battery.
    Simrad (Navico) usually turns around in 4 weeks.
  3. Pascal, Sep 12, 2016
    #3
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,546
    Location:
    Miami, FL
    Duh. Can't believe I didn't think about that :)