6.0 Troubleshooting
This section describes some common error messages that may be
generated by the VFS101, as well as solutions to some common
problems. A full list of VFS101 error messages can be found in
Appendixes B and C.
"
If the VFS101 does not respond when depressing the VAS,
verify the VFS101 Circuit Breaker is closed, or the VFS101
fuse is intact. If equipped with a dedicated power switch,
confirm the switch is in the on position.
"
When an error tone is heard from the VFS101, the title line of
the active flightplan on the primary GPS will briefly display a
message describing the cause of the error.
"
The VFS101 relies on location information from the primary
GPS to function. If the VFS101 is not receiving location
information from the primary GPS when the VAS is
depressed, then the title line of the flightplan on the primary
GPS will briefly display “NO GPS POS DATA” and the VFS101
will refuse to process speech commands. Examine the Primary
GPS to determine if sufficient satellite coverage is available.
"
If the VFS101 is not responding, and the title line of the
flightplan on the Primary GPS reads *VFS101 SHUTDOWN*,
then the VFS101 has seen too many VAS closures and
openings without a successful recognition and has shut down
for safety reasons. The VFS101 can be restarted by removing,
and then reapplying power using the VFS101 circuit beaker or
switch.
"
After the VAS has been depressed without issuing a single
beep or an error tone for 20 seconds, the VFS101 will
terminate it's recognition attempt and issue an error tone. A
new speech entry cannot begin until the VAS has been
released and depressed.
"
If the steps above are unable to restore proper operation,
remove power from the VFS101 unit (via dedicated circuit
breaker or switch) and refer the unit to authorized
maintenance personnel.
"
If the primary GPS navigational database's cycle number
(version) does not match the cycle of the navigational
database on the VFS101 then a warning message indicating this
will be played through the audio system.
"
When a new navigational database is installed, calibration will
be required before the VFS101 can be used. An audio message
will be played when the VAS is depressed indicating that
calibration is required. See section 7.3 for information on
calibration. This issue is applicable only when the VFS101 is
used with Garmin GNS 430W / 530W series GPS units.
"
While extremely unlikely, it is possible that the contents of a
stored flightplan originally entered using the VFS101 could
change after a GPS power cycle. Verify all stored flightplans
before activation.
"
When entering successive airways, intermediate intersection
waypoints may be omitted, but the final exit waypoint is still
required. For example: BOS V292 V106 PWL is acceptable.
Page 16 / 25
