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Alarm/Warning
CAN bus failure
Check heading
Drive inhibit
Drive not available
Drive unit failure
End of route
Engage output overload
Possible cause
Not possible to send or receive data
although bus voltage is ok.
Jump in heading of more than 10°/
second.
Motor or solenoid drive electronics
critically overloaded.
Autopilot system is unable to
control the rudder.
The autopilot computer has lost
communication with device.
Shown on the active control unit
when an end route waypoint name
has been received from the Plotter/
ECS.
Bypass valve or clutch is drawing
excessive current.
Recommended action
• Check cable connections
• Check steering compass
• Change to another heading source
• Check connectors and cables
• Check that the rudder angle measurement and the actual
physical rudder position corresponds
• Try to hand steer the rudder and verify that the rudder can
be moved freely
• No rudder response often accompanied by drive not
available
• Check connectors and cables
• Manually control the vessel
• Select a new rout
• Ensure there is no shortage to ground or cabling damage
• Disconnect cable from autopilot computer to motor, and
make sure there is no alarm when engaging FU or AUTO
mode
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