190-01007-C1
GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1
Page 5-7
5.3 GTN Xi System Messages
5.3.1 GTN Xi System Related Alerts
Table 5-2 Alert Text Troubleshooting Guide
Alert Text
Possible Cause
Corrective Action
CROSSFILL ERROR
- Crossfill is
inoperative. See
CRG for crossfilled
items.
An error was detected during
unit-to-unit communication of
data. This can be caused by
problems with HSDB wiring or by
either GTN Xi (or GTN 6XX/7XX)
needing service. Refer to the
Cockpit Reference Guide (CRG)
for crossfilled items.
Start both units in Configuration mode and
ensure that both units are configured for
crossfill.
Check J1002 connection on crossfilled
GTN Xi units.
Ensure that P1002-10 of GTN Xi #2 is
connected to ground.
DEMO MODE -
Demo mode is active.
Do not use for
navigation.
The GTN Xi is in Demo mode
and must not be used for actual
navigation.
Check that the DEMO MODE SELECT*
input (P1002-1) is not tied to ground.
Ensure that the
Direct-To
key is not stuck.
CDI/HSI FLAG - Main
lateral/vertical flag on
CDI/HSI is
inoperative.
The main lateral or vertical
superflag has been turned off
due to an overcurrent condition.
Check the GTN Xi main lateral and vertical
superflag connections to the CDI/HSI for
correct wiring, shorts to ground, and
overcurrent. Superflags should not drive
more than 320 mA.
GTN - GTN needs
service.
The GTN Xi has detected an
internal failure.
Contact Garmin Technical Support.
COOLING - GTN
overtemp. Reducing
backlight brightness.
The GTN Xi has detected
excessive display backlight
temperature. The backlight has
been automatically dimmed to
reduce the unit temperature.
Check for adequate ventilation or check
cooling airflow.
Ensure the cooling fan is operating and is
unobstructed.
KEY STUCK - HOME
key is stuck.
The bezel’s
Home
key is stuck in
the enabled or pressed state.
Press the
Home
key again to cycle its
operation.
If the message persists, contact Garmin
technical support.
KEY STUCK - Direct-
to key is stuck.
The bezel’s
Direct-To
key is
stuck in the enabled or pressed
state.
Press the
Direct-To
key again to cycle its
operation.
If the message persists, contact Garmin
technical support.
KNOB STUCK - Dual
concentric inner knob
is stuck in the
pressed position.
The inner large knob push-key is
stuck in the enabled or pressed
state. Knob is located on the right
side of the unit.
Press the knob to cycle its operation.
If the message persists, contact Garmin
technical support.
KNOB STUCK -
Volume knob is stuck
in the pressed
position.
The small knob push-key is stuck
in the enabled or pressed state.
Knob is located on the left side of
the unit.
Press the knob to cycle its operation.
If the message persists, contact Garmin
technical support.
