190-01007-A1
System Maintenance Manual GTN 6XX/7XX Part 23 AML STC
Rev. 5
Page 5-7
CROSSFILL
ERROR - GTN
software mismatch.
See CRG for
crossfilled items.
The software does not match
between GTNs. Crossfill
disabled. See the Cockpit
Reference Guide (CRG) for
crossfilled items.
Check the software version of both GTNs
and ensure they match. Update the
software if needed.
CONFIGURATION
MODULE - GTN
configuration
module needs
service.
The GTN configuration module
has failed.
Verify the configuration module wiring is
correct.
Replace the configuration module.
The GTN configuration module
is incorrectly wired.
REMOTE KEY
STUCK - Remote
OBS key is stuck.
The remote OBS switch is stuck
in the enabled or pressed state.
Press the switch again to cycle its
operation.
Go to the GTN DIAGNOSTICS -
DISCRETE INPUTS page in
configuration mode and check that the
state of the input changes when the OBS
switch is pressed and released.
Verify that the remote OBS switch wiring
is correct.
Contact Garmin technical support.
REMOTE KEY
STUCK - Remote
CDI key is stuck.
The remote CDI key is stuck in
the enabled or pressed state.
Go to the GTN DIAGNOSTICS -
DISCRETE INPUTS page in
configuration mode and check that the
state of the input changes when the CDI
switch is pressed and released.
Verify that the CDI switch wiring is
correct.
Press the switch again to cycle its
operation.
Contact Garmin technical support.
COOLING FAN -
The cooling fan has
failed.
The wiring to the fan may be
faulty, the fan connector may
be unplugged, or the fan may
have failed.
Check the wires between P1001-43, -58,
and -59 and the fan to ensure they are
not cut, damaged, or broken. Ensure the
fan connector is completely engaged.
Also ensure the fan blades are not
obstructed and they can rotate freely.
The fan does not turn on if the unit is
cool.
GNS CROSSFILL -
GTN user
waypoint(s)
replaced with GNS
user waypoint(s).
A user waypoint from the GNS
replaced one or more existing
waypoints on the GTN.
Ensure that the waypoints on the GNS
have unique names before transferring to
the GTN to avoid overwriting existing
waypoints.
GNS CROSSFILL -
Catalog full; not all
GNS waypoint(s)
transferred.
A user waypoint from the GNS
could not be created because
the user waypoint catalog is full.
Remove some of the waypoints from the
catalog to make room for the waypoints
from the GNS.
Alert Text
Possible Cause
Corrective Action
