Simrad AP70 Operation Manual page 43

Alarm/Warning Type
W
Drive overload
A
Steering compass
A
missing
Thruster inhibited W
Warning/Alarm condition
AC70: Motor/sol current >
30 A
SD80: Sol current >8 A
AC70: Mot/sol current > 55 A
SD80: Sol current > 9 A
Lost sensor data
Vessel speed > set limit
The alarm system | AP70/AP80 Operator Manual
Possible cause and recommended action
Reversible motor
Motor stalls or is overloaded
4. Fix possible mechanical blocking of rudder.
5. If heavy sea at high rudder angle, try to reduce boat
speed or rudder angle by steering at another heading
6. Make sure there is no shortage to ground or cabling
damage, disconnect cable from AC70 to motor, and
make sure there is no alarm when trying to run NFU-
mode
Solenoids
Shortage to ground or cabling damage. Same action as for
motor
No data from the selected steering compass. If no monitor
(back up) compass; the autopilot goes to STBY mode.
If Monitor compass; the autopilot switches to monitor
compass. If there is a diff erence the autopilot will gradually
synchronize with the new heading (2 minutes).
The vessel speed exceed the set limit for when thrusters
can be used.
 Note:
The Thruster inhibit limit will only apply when
speed source is Log or SOG, not if the speed is set
manually.
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