Garmin NavTalk Pilot - Manual (Page 161)

147
Troubleshooting Guide
Symptom Probable Cause Remedy
Unit does not turn On
in Battery mode.
Unit will not operate in
AirCell mode.
“Poor GPS Coverage”
message is constant.
Ground Cellular signal is
lost.
AirCell signal is lost.
! Battery is exhausted
! Power is off to the adapter.
! Adapter cord is not properly
connected to the unit.
! Location of the unit does not
allow a clear view of the sky.
! You are located at the
edge of a cell coverage
area or you have left a cell
coverage area.
! Your signal is blocked by a
structure on the ground
(ground cellular).
! You are located at the
edge of or outside of a
cell coverage area.*
! You cannot operate in the
AirCell mode when your
aircraft is on the ground
and moving less than 20
mph.
! Recharge battery
! Turn on power.
! Check cord connection.
! Move the unit to a new
location.
! Check cell coverage area
description.
! Move to another location.
! Check cell coverage
description.
! Do not attempt to operate
in AirCell mode when on
the ground.
NOTE: AirCell signals are broadcast up from the ground in a radiation pattern forming an inverted
cone. At lower altitudes the amount of cell overlap is less than at higher altitudes, which in certain
instances, may cause temporary loss of signal. Typical coverage begins at 5,000 ft. and extends past
20,000 ft.
Appendix E
Maintenance