User Guide 23
S100 Alarm messages
When the S100 detects a fault or failure on the system, it will activate one of
the alarm messages listed in the following table.
Unless otherwise stated, you should respond to the alarm by pressing
standby to clear the alarm and return to manual control, before you attempt
to resolve the problem.
In some situations, the S100 will raise more than one alarm. When you have
dealt with the first alarm, it will display the next alarm.
ALARM MESSAGE POSSIBLE CAUSE and SOLUTION
CURRENT LIMIT Serious drive failure – the drive is taking too much
current due to short-circuit or jamming. Check the
drive unit and wiring.
DRIVE STOPPED The autopilot is unable to turn the rudder (this
occurs if the weather load on helm is too high.
Check drive.
INITIALISING This alarm occurs if you try to activate the pilot
before it is ready. Your boat must be run at more
than 3 knots for longer than 30 seconds before acti-
vating the pilot.
LARGE XTE This alarm will sound when you are more than
0.3nm from your planned track. The alarm will also
state if you are to PORT or STARBOARD of the track,
LRN FAIL 1, 2 or 4 AutoLearn not completed successfully.
Failure codes:
1 = AutoLearn has not been carried out
2 = AutoLearn failed, usually due to manual inter-
ruption
4 = AutoLearn failed, possibly due to drive failure
Repeat the AutoLearn procedure.
MOT POW SWAPPED Motor cables are connected to power terminals
(and power cables are connected to motor termi-
nals) at course computer. Turn off power and swap
over connections.
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