Symptom
Pilot consistently over or
under compensates when a
course error is detected
After functioning normally
course is suddenly lost and the
Wheelpilot goes into Standby
Mode.
Helm is hard over and alarm is
continuously on.
Power supply is live, but pilot
is not on.
Loss of course under Sail To
Wind Mode.
Cannot select Sail To Wind
Mode.
Cannot select NavLock Mode.
Autotack function not
working.
Pilot exits NavLock before
waypoint is reached.
Pilot does not hold accurate
course in auto mode
Probable Cause
* Gain setting is respectively too high
or too low.
* Steering sensitivity scaling has been
incorrectly set
* Power interrupted briefly, or low
voltage.
* Supply cable used too small.
* Intermittent connection.
* Steerage way insufficient to control
course, or sails are aback.
* Steering scaling set too high
* Wheelpilot is wired incorrectly.
* Apparent wind has become too light
to give a consistent direction.
* Masthead unit is not connected.
* Required NMEA sentence not being
transmitted.
* Navigational receiver not connected.
* No waypoints have been
programmed.
* Wrong NMEA format is being used.
* Pilot is in NavLock Mode.
* Pilot is in Steer To Wind Mode and
a) apparent wind is >90…
b) autotack being attempted is in
the wrong direction.
* Cross Track Error has exceeded 1.21
Nm.
* Fluxgate compass is being affected
by interference from nearby magnetic
influences (binnacle compass,
speakers) or metallic objects (winches,
deck hardware etc).
Remedy
* Adjust gain setting (see
section 4.3).
* Enter the correct scaling for
the vessel (see section 4.1).
* Increase size of cable.
* Check all connections.
* Charge batteries.
* Uprate batteries.
* Reset the vessel on course
and re-engage pilot
* Enter the correct scaling for
the vessel (see section 4.1).
* Check wiring of pilot
(see section 5.2).
* Change to Compass
Mode.
* See section 5.5.
* Check NMEA interface
connections.
* Check NMEA0183 format
is being transmitted by
navigational receiver.
* Exit NavLock.
* Luff up until apparent
wind is less than 90….
* Reset the vessel on course
and re-engage NavLock.
* Check compass has been
calibrated (see section 5.3).
* Fit ATC600 external
fluxgate compass instead.
* Replace binnacle compass
with bulkhead compass.
* Relocate objects that are
causing interference.
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