Garmin 225 Manuale Utente

4-4

Garmin GTR 225/225A/225B Pilot’s Guide

190-01182-00  Rev. A

When a Message has been issued by the unit, the Message will be shown on 

the display. After viewing the messages, touch the ENT key to acknowledge the 
message and return to the previously viewed page. An acknowledged message 
will not be redisplayed even if the condition persists. Messages provide an aid to 
troubleshooting system operation. 

COM RADIO -  
Com radio needs 
service. 

The com radio is 
reporting that it needs 
service. The com radio 
may continue to 
function. 

Cycle the power to the COM radio. 
Contact dealer for service. 

COM RADIO -  
Com radio may be 
inoperative. 

The com radio is not 
communicating properly 
with the system. 

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. 

COM RADIO -  
Com overtemp 
or undervoltage. 
Reducing 
transmitter power. 

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. 

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. 

COM RADIO -  
Com locked to 
121.5 MHz. Hold 
remote com 
transfer key to exit. 

Com radio is locked to 
121.5 MHz. 

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.