400W Series
190-01226-14 Rev. 3
Instructions for Continued Airworthiness Bell 407
Page 22 of 26
Alert Text
Possible Cause
Solution
TERRAIN configuration has
changed
The unit’s terrain settings have
changed since it was last turned on
in normal mode.
Reconfigure TERRAIN settings
Contact Garmin technical
support
Terrain database integrity
error
The 400W Series unit has detected a
problem with a database on the
Terrain data card.
Reloading the information onto
the card.
Replace the card.
TERRAIN has failed
The unit has detected a failure in the
terrain system.
Ensure that Terrain database is
inserted in the right most card
slot.
Reload the TERRAIN database.
Contact Garmin technical
support.
Traffic device has failed
The 400W Series unit cannot
communicate with the traffic system
and/or the traffic system is reporting
a system failure.
Check for proper configuration
Check for correct wiring
Refer to the Traffic system
installation manual.
Traffic device needs service
The traffic device is reporting a
system failure.
Refer to the Traffic system
installation manual.
User card format unknown
A data card has been inserted, but
the format of the card is not
recognized.
Reload the information onto the
card. If that does not solve the
problem replace the card.
VLOC has failed (420W and
430W only)
The GNC 420/GNS 430W has
detected a failure in its VLOC
receiver.
Contact Garmin technical
support.
VLOC is not responding
(420W and 430W only)
Internal system-to-system
communication between the main
processor and the VLOC receiver
has failed. Operational status of the
VLOC receiver is unknown.
Contact Garmin technical
support.
VLOC needs service
(420W and 430W only)
The unit has detected a failure in its
VLOC receiver. The VLOC receiver
may still be usable.
Contact Garmin technical
support.
VLOC remote transfer key is
stuck (420W and 430W only)
The remote VLOC transfer switch is
stuck in the enabled (or “pressed”)
state.
Try pressing the switch again to
cycle its operation.
Contact Garmin technical
support.
VLOC transfer key stuck
(420W and 430W only)
The VLOC flip-flop key is stuck in the
enabled (or “pressed”) state.
Try pressing the VLOC flip-flop
key again to cycle its operation.
Contact Garmin technical
support.
Stormscope device has
failed
The 400W- Series unit cannot
communicate with the WX-500.
Check for proper configuration
The WX-500 is reporting a system
failure.
Check the wiring
Refer to the WX-500 installation
manual for additional
troubleshooting information.
Stormscope heading has
failed
The WX-500 is reporting invalid
heading data.
Check for proper configuration of
WX-500
The failure may be within the
WX-500 or other connected
equipment.
Summary of Contents for 400W Series
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