ComNav 2001 - Problem Solving

ComNav 2001 Autopilot System
P/N 29010017 V1.0 - 62-
PROBLEM SOLVING
Several different problems and possible solutions are outlined below. If the recommended solution does not solve the
problem, return the autopilot to an authorized service centre for servicing.
1. The autopilot does not turn on.
a) Check for power reaching the distribution box.
Check the main fuse or breaker panel.
b) Check that the main interconnect cable is
properly plugged into the rear of the autopilot.
c) Check the PILOT fuse. If it is blown, replace it
with a 5 X 20 mm 1.0 amp fuse. One spare fuse
of this value has been included with the autopilot.
Make sure the power leads are not reversed
before using the spare fuse.
2. The autopilot does not turn on, but the
alarm sounds continuously.
Check for a short circuit between +5V and
ground. Disconnect all leads in the distribution
box except PILOT PWR(+) and PILOT PWR(-).
If this solves the problem, then reconnect one set
of leads at a time until the problem re-occurs. The
problem lies with the cabling to that external
device, or the external device itself (ie. a control
box, the rudder follower, the External Alarm, the
remote heading display, etc.).
If the problem does not go away after
disconnecting all the leads, then there is
something wrong with the autopilot. Return it to
the factory or an authorized service centre for
servicing.
3. The autopilot turns on, but does not turn the
rudder.
a) Check for a fault in the power steering system
(ie. blown breaker or fuse in electric system,
broken drive belt or jammed four-way valve,
etc.).
b) Check for a possible short in the output cable
to the rudder drive. Check for full output voltage
on the SWITCHED PWR line with autopilot in
the POWER STEER mode. The yellow SWI
POWER LED in the distribution box should
come on when the master select switch on the
autopilot is in