Garmin GMX 200 Installation Manual page 68

P r o b l e m
Unit shows FPL data flag.
Unit shows ALT data flag.
Unit shows TER data flag.
(internal terrain function is
being used)
Unit shows TAWS data flag.
(external TAWS source is
being used)
P a g e 6 - 2
R e v i s i o n D
C a u s e
External GPS source does not
have active flight plan.
Data port configuration incorrect.
GMX 200 is configured to use
external GPS navigator as source
for altitude data and GPS is not
turned on.
F o r P r e s s u r e A l t i t u d e
Serial altitude encoder not
powered up, has not completed its
warm-up sequence, or is not
functioning properly.
F o r G P S A l t i t u d e
External GPS navigator has not
acquired a position
GMX 200 is configured to use
external GPS as source for
altitude data and GPS altitude.
GMX 200 is configured to use a
GX unit as source for altitude data
and GX not configured properly.
Wiring error.
Terrain database incorrect.
Invalid altitude supplied to unit.
External TAWS system not set up
properly.
GMX 200 is not configured
correctly.
Wiring error.
S o l u t i o n
Ensure that the GPS position source
has an active flight plan.
Ensure that the data port
configuration and altitude type are
correct and the selected port matches
how the GMX 200 is wired for the
altitude source.
Ensure GPS navigator is turned on,
shows a valid altitude, and has
acquired position and valid waypoint.
Ensure that serial altitude encoder is
powered up and functioning properly,
and has warmed up completely.
Ensure that the external GPS has
acquired a position. It may be
necessary to ensure that the aircraft is
clear of hangars, buildings and trees.
The GPS source does not provide
GPS altitude. Verify in Appendix C
that GPS source can supply selected
altitude type.
Verify that GX has extended data
output enabled.
If a separate altitude encoder is used,
ensure that the wiring between the
GMX 200 and the altitude encoder is
correct.
Ensure the unit has the appropriate
terrain database loaded for the area
of operation. The terrain database is
indicated on the power-up and system
status pages of the GMX 200.
Ensure that valid altitude is being
supplied to the unit (an ALT data flag
should not be present).
Refer to the TAWS system
manufacturer's documentation for
configuration and testing of the TAWS
unit.
Ensure that GMX 200 configuration is
correct.
Ensure that the wiring between the
GMX 200 and the TAWS source is
correct. The message (MSG)
function can be used to verify if the
GMX 200 is receiving ARINC 429 and
ARINC 453 data from the TAWS.
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