ComNav 2001 Autopilot System
P/N 29010017 V1.0 - 64-
6. The displayed compass heading does not
follow the actual compass heading properly.
a) Check that the compass cable is properly plugged
into the rear of the autopilot.
b) Check for any compensating magnets,
particularly heeling magnets, that are placed too
close to the flux-gate sensor.
c) Check for any magnetic material such as tools,
pop cans, etc., near the compass, or directly
underneath it, perhaps in a drawer or cabinet.
7. The autopilot steers normally on some
courses, but not on others, particularly north
or south.
The problem most likely lies with poor compass
adjustment. Contact a compass adjustor to have the
compass compensated for deviation, including that
caused by heeling error. Proper compass adjustment
is particularly important on steel hulled vessels. Do
not attempt to move any compensating magnets
yourself, as this may make the compass
dangerously inaccurate, particularly if it is used as a
steering compass.
8. The autopilot steers poorly on all courses.
a) Check that the internal controls, especially the
Dead Band potentiometer, are set correctly. If the
autopilot requires the Dead Band potentiometer to
be more than 1/8th of a turn from fully counter-
clockwise to get proper rudder position control,
either the rudder speed is too fast, or there is a
problem with the vessels steering system,
particularly with either the mounting for the
hydraulic ram, or worn rudder shaft bushings. Other
problems may include excessive amounts of air in
the steering, or excessive play in mechanical
steering.
b) Watch the card on the autopilot compass to make
sure that it follows the vessel movements properly.
If the card seems to turn with the vessel for a few
degrees, and then come free, either the pivot or
jewel in the compass may be defective.
9. The remote control doesn't work at all.
Check very carefully that the wires are inserted into
the terminal block in the remote control in the
correct order, and not in reversed order.
10. The remote control doesn't work in
POWER STEER or TILLER mode.
Check that the Dip Switches on the autopilot
control circuit board are set properly. Dip Switch 5
should be OFF if a type 101 remote is plugged into
the REMOTE 1 receptacle on the rear of the
autopilot, or ON if it is a type 201 or 211 remote.
Dip Switch 6 should be OFF if a type 101 remote is
plugged into the REMOTE 2 receptacle on the rear
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