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Alarm/Warning
No rudder response
Off heading
Override
Possible cause
No response to rudder command.
The vessel heading is outside set
off heading limit. May be caused by
extreme weather conditions, and/or too
slow speed.
EVC override via SG05 Pro, override via
SD80/AD80 Handshake or override via
SD80/AD80 RUD UI port.
Recommended action
• For SD80, check that port/stbd led is activated (ref label in
cover for location
• Replace the autopilot computer drive board
• Check connectors and cables
• Check rudder feedback transmission link (not applicable for
Virtual feedback installations)
• Check the drive unit motor/brushes
• Check for mechanical play in rudder
• Check if the rudder is actually not moving
• Check that the rudder drive unit is powered and running
• Check for other mechanical issues between autopilot com-
puter and rudder
• Check steering parameters (Rudder, Autotrim, Seastate filter)
• Increase response/rudder value
• Increase boat speed, if possible, or steer by hand
• Wait and see if autopilot is able to bring vessel back on
course.
• If unintended warning, make sure override handle is not
being activated by loose objects
• Check cabling and override switches connected to
Handshake port of SD80 or AD80 board
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