Garmin GNC 420AW Installation Manual - page 132
Page 6-8
400W Series Installation Manual
Rev. F
190-00356-02
Alert Text
Possible Cause
Solution
• No destination waypoint has
been selected.
• Select a waypoint
OBS not available
• The GPS receiver cannot
currently determine its position.
• Refer to Table 6-1 “The 400W
Series unit does not compute
a position.”
RAIM position warning
• Although sufficient GPS satellite
coverage may exist, Receiver
Autonomous Integrity
Monitoring (RAIM) has
determined the information from
one or more GPS satellites may
be in error.
• Wait for GPS satellite
geometry to improve.
Searching the sky
• The 400W Series unit is
searching the sky for GPS
satellites.
• Wait 20 minutes for unit to
complete cycle or until the
current position is located.
Stored data was lost
• All user waypoints, flight plans
and system settings have been
lost due to a memory battery
failure or system reset.
• If system was not reset
replace the battery.
• Reconfigure TERRAIN
settings
TERRAIN configuration has
changed
• The unit’s terrain settings have
changed since it was last
turned on in normal mode.
• Contact Garmin technical
support
• Ensure that Terrain database
is inserted in the right most
card slot.
• Reload the TERRAIN
database.
TERRAIN has failed
• The unit has detected a failure
in the terrain system.
• Contact Garmin technical
support.
• Check for proper configuration
• Check for correct wiring
Traffic device has failed
• The 400W Series unit cannot
communicate with the traffic
system and/or the traffic system
is reporting a system failure.
• 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 (430W only)
• The 430W has detected a
failure in its VLOC receiver.
• Contact Garmin technical
support.
VLOC is not responding
(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.