Garmin GTN 725 Cockpit Reference Manual page 80

Message
COM RADIO -
Com locked to
121.5 MHz. Hold
remote com
transfer key to exit.
COM RADIO -
Com overtemp
or undervoltage.
Reducing
transmitter power.
COM RADIO -
Com radio may be
inoperative.
COM RADIO -
Com radio needs
service.
CONFIGURATION
- Terrain/TAWS
configuration is
invalid. GTN needs
service.
CONFIGURATION
MODULE -
GTN configuration
module needs
service.
70
Description
Com radio is locked to
121.5 MHz.
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.
The com radio is not
communicating properly
with the system.
The com radio is reporting
that it needs service. The
com radio may continue to
function.
TAWS is inoperative
due to a configuration
problem with the GTN.
This message will be
accompanied by a TER FAIL
annunciation.
The GTN cannot
communicate with its
configuration module. The
GTN may still have a valid
configuration.
GTN 725/750 Cockpit Reference Guide
Action
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.
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.
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.
Cycle the power to the COM radio.
Contact dealer for service.
Contact dealer for service.
Contact dealer for service.
190-01007-04 Rev. L