Fault Finding; Auto Compass Calibration; Adjusting Belt Tension - Simrad Navico Wheelpilot WP10 Manual

5.2 Fault Finding

Symptom
Pilot consistently over or * Gain setting is respectively too high
under compensates when a or too low.
course error is detected * Steering sensitivity scaling has been
incorrectly set
After functioning normally * Power interrupted briefly, or low
course is suddenly lost and the voltage.
Wheelpilot goes into Standby * Supply cable used too small.
Mode. * Intermittent connection.
Helm is hard over and alarm is * Steerage way insufficient to control
continuously on. course, or sails are aback.
* Steering scaling set too high
Power supply is live, but pilot * Wheelpilot is wired incorrectly.
is not on.
Pilot does not hold accurate * Internal fluxgate compass is being
course in auto mode affected by interference from nearby
magnetic
compass, speakers) or metallic objects
(winches, deck hardware etc).
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Probable Cause
Remedy
* Adjust gain setting (see
section 3.3).
* Enter the correct scaling for
the vessel (see section 3.1).
* 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 3.1).
* Check wiring of pilot
(see section 4.2).
* Check compass has been
calibrated (see section 5.3).
influences (binnacle * Replace binnacle compass
with bulkhead compass.
* Relocate objects that are
causing interference.

5.3 Auto Compass Calibration

Although the Wheelpilot internal compass is extremely
accurate, after installation it is necessary to calibrate the
compass to compensate for any deviations caused by
objects surrounding it on board the vessel.
With the vessel motoring along slowly (2-3 knots) in
calm conditions and the Wheelpilot in Standby Mode,
engage the clutch and press the Starboard key a num-
ber of times to induce a slow clockwise rotation of the
vessel. Press and hold the TACK key, followed by the
Port and Starboard keys simultaneously to enter Auto
Compass Calibration Mode (Fig 5.1). The Port and
Starboard LEDs will both light. Allow the vessel to turn
through a minimum of 1 / turns (450¼) in approximate-
1
4
ly two minutes, during which time the fluxgate compass
will automatically calibrate itself.
If the rate of turn or the boat speed is too high, the Port
LED will flash (Fig 5.2) indicating that it is necessary to
either slow the boat or decrease the angle of turn. If the
rate or turn or boat speed is too slow the Starboard LED
will flash, indicating that it is necessary to either
increase the boat speed or increase the angle of turn. A
double beep will indicate that the calibration has been
successful, and the Wheelpilot will return to Standby
Mode. If the calibration has been unsuccessful after a
period of four minutes, a long beep will sound. Try
again carefully following the above directions.

5.4 Adjusting Belt Tension

The belt tension is set when the Wheelpilot is assem-
bled, however it may be necessary to adjust this during
the lifetime of the pilot.
The tension is adjusted by means of a screw situated
underneath the clutch lever (Fig 5.3). This screw is only
accessible when the lever is in the up (disengaged) posi-
tion. To increase the clutch tension, turn the screw anti-
clockwise. To decrease the tension, turn the screw
clockwise. The scale next to the screw indicates the cur-
rent tension setting. When the pointer is at the top, the
clutch is at maximum tension. Minimum tension is
indicated when the pointer is at the bottom.
TACK TACK
TACK TACK
Fig 5.1 - Auto Compass Calibration
TACK
Fig 5.2 - Rate of turn too fast
Indicator pointer
Scale
Adjusting screw
Fig 5.3 - Belt tensioner
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