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Pete
Pete, Electronic Engineer
Category: Marine Electronics
Satisfied Customers: 16329
Experience:  Over 16 years of experience installing and repairing electronics.
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I have an SPX 30 auto pilot with a mechanical linear drive.

Customer Question

I have an SPX 30 auto pilot with a mechanical linear drive.
When I engage the auto pilot, it will work for about 30 seconds
and then disengage with current limit flashing on the control
screen. The auto pilot has been working fine until now. When the
auto pilot is on standby, the helm turns easily without restriction.
I checked all power connections and they appear secure. Checked
the linear drive unit for any obvious problems and none detected.
This is a 2010 Hunter sailboat. Any suggestions?
Thank you, ***** *****
Submitted: 5 months ago.
Category: Marine Electronics
Expert:  Pete replied 5 months ago.

Hi Patrick

Expert:  Pete replied 5 months ago.

This problem will occur if the linear drive is drawing to much current.

The SPX30 is the control head that sends the signals to your motor control, which then drives whatever is turning the rudders.

If the motor that is turning the rudders is drawing to much current, it will give you the current limit error.

This can happen for a few reasons: if the rudder is jammed the motor will work too hard, causing an over-current. If there is tightness or corrosion in the steering system that will cause it as well. If there is corrosion in the wiring anywhere between the motor and the motor control that can cause a current over limit. And if the motor is just plain bad, that will cause it too.

You will need to investigate these possible causes to troubleshoot further and remedy the cause of the over-current.

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Expert:  Pete replied 5 months ago.

Hi, just checking in on your question, do you need any further assistance?

Expert:  Pete replied 5 months ago.

Hi, just checking in on your question, do you need any further assistance?

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