ComNav 2001 - Page 61

ComNav 2001 Autopilot System
P/N 29010017 V1.0 - 61-
ERROR CHECKING
No Data from Nav. Device Error
The autopilot is not receiving any recognizable
data from the Nav. Device. This could be because
1) the Nav. Device is not programmed correctly;
2) the Nav. Device is not putting out any data; 3)
there is a problem with the cabling between the
Nav. Device and the autopilot (ie. broken or
reversed wires); or 4) there is a fault with the
autopilot interface circuitry. Some Nav. Devices
will not put out a data sentence for the autopilot
until a waypoint has been entered, and navigation
towards it started.
Faulty Output Error
- The autopilot is not operable. Both the Port and
Starboard outputs are on simultaneously. This can
be caused by internal failure of the autopilot, or
by problems in the cabling leading to the rudder
angle indicators, or in the rudder angle indicators
themselves. Try disconnecting the rudder angle
indicators in the autopilot distribution box. If the
problem does not go away, there is something
wrong with the autopilot that will require
servicing.
Permanent Memory Error
- The autopilot is not operable. The portion of
RAM memory chip used for permanent data
storage tested faulty.
Prom Memory Error
- The autopilot is not operable. The memory chip,
which contains the autopilot program, tested
faulty.
Temporary Memory Error
- The autopilot is not operable. The portion of
RAM memory chip used for temporary data
storage tested faulty.
If any of these alarm conditions occur, and cannot be easily rectified, return the autopilot to an authorized service
centre for servicing.