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Alarm/Warning
Drive reference voltage
missing
Drive unit failure
End of route
Possible cause
Reference voltage to AD80 is missing.
The autopilot computer has lost
communication with device.
Activated on the active control unit
when an end route waypoint name has
been received from the Plotter/ECS.
Recommended action
• Check that the two U_CTRL dip switches on the AD80
board is set correctly (ref. cable connection label inside
faulty unit)
º If drive control signal is 4-20 mA current or voltage
using internal ±10 V reference, switches must be set to
INT.
º If external ref. voltage is connected switches must
be set to EXT
• If external reference voltage, check cabling and measure
correct voltage between U_REF+ and U_REF- on AD80
board
• Check that green CPU led on the AC70 is alternating (ref.
label inside unit cover for location of led)
º If off , check local power supply/fuse
•
For AD80/SD80, check CAN supply for 9-15 V between
NET-S and NET-C of SimNet plug
º If LED is ok, check cabling, T-connector backbone
etc
º If LED is on, try to restart unit by turning power off/
on
• Manually control the vessel
• Select a new rout
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