Garmin GTN 725 Pilot's Manual page 496

Message
Foreword
COM RADIO -
Getting
Com radio needs
Started
service.
Audio &
Xpdr Ctrl
Com/Nav
COM RADIO -
Com radio may be
FPL
inoperative.
Direct-To
Proc
COM RADIO -
Com overtemp
Charts
or undervoltage.
Reducing
Wpt Info
transmitter power.
Map
Traffic
COM RADIO -
Terrain
Com locked to
121.5 MHz. Hold
Weather
remote com
transfer key to exit.
Nearest
CONFIGURATION
Services/
Music
- Terrain/TAWS
configuration is
Utilities
invalid. GTN needs
service.
System
Messages
Symbols
Appendix
17-4
Index
Description
The com radio is
reporting that it needs
service. The com radio
may continue to
function.
The com radio is not
communicating properly
with the system.
Com radio is
in overtemp or
undervoltage mode
and transmitting power
has been reduced to
prevent damage to the
com radio. Radio range
will be reduced.
Com radio is locked to
121.5 MHz.
TAWS is inoperative
due to a configuration
problem with the GTN.
This message will be
accompanied by a TER
FAIL annunciation.
Garmin GTN 725/750 Pilot's Guide
Action
Cycle the power to the COM radio.
Contact dealer for service.
Press and hold the volume knob or
the external com remote transfer
(COM RMT XFR) switch, if installed
– this will force the com radio to
121.5 MHz. Contact dealer for
service.
Decrease length of com
transmissions, decrease cabin
temperature and increase cabin
airflow (especially near the GTN).
Check aircraft voltage and reduce
electrical load as necessary.
Contact dealer for service if this
message persists.
The external com remote transfer
(COM RMT XFR) switch has been
held and the com radio is tuned to
121.5. To exit this mode, hold the
com remote transfer (COM RMT
XFR) switch for two seconds.
Contact dealer for service.
190-01007-03 Rev. D