Garmin 255A manual Verify glideslope deviation, Property with, System, Switch has been

Message

Description

Action

COOLING FAN -	The GTN cooling fan is	Decrease cabin temperature and
The cooling fan has	powered, but it is not	increase cabin airflow (especially
failed.	turning at the desired	near the GTN) to prevent damage
	RPM.	to the unit. Contact dealer for
		service.
DISPLAY -	The display board is	Contact dealer for service.
Display board	indicating that it needs
needs service.	service.
GLIDESLOPE -	The glideslope board is	Verify glideslope deviation
Glideslope receiver	indicating that it needs	indications with another source
needs service.	service. The glideslope	and crosscheck final approach
	board may continue to	fix crossing altitude. If another
	function.	glideslope source is not available
		for verification, fly a GPS based
		approach. Contact dealer for
		service.
GLIDESLOPE -	The glideslope board	Fly an approach that does not use
Glideslope receiver	is not communicating	the glideslope receiver (VOR, LOC,
has failed.	property with the	GPS). Contact dealer for service.
	system.
POWER ALERT -	Power has been	Re-apply power to the unit.
Unit will shut down	removed from the unit.
if power switch
is not restored
immediately.
REMOTE KEY	The Push To Talk key/	Verify the Push To Talk key/switch
STUCK -	switch has been in	is not stuck. Contact dealer for
Com push-to-talk	pressed position for	service if this message persists.
key is stuck.	at least 30 seconds.
	This input will now be
	ignored and the com
	radio will no longer
	transmit.

190-01182-01 Rev. A Garmin GNC 255A/255B Pilot’s Guide 4-5