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

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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

Image 57

Contents GNC 255A/255B November Limited Warranty 190-01182-01 Rev. a Iii Operation US Toll Free Canada Toll Free Product Registration and SupportRecord of Revisions Contents 2.1 2.22.3 Index Index-1 This page intentionally left blank Product Description Getting StartedPower/Com Volume/Squelch Knob Nav Volume/ID KnobPilot Controls FLIP/FLOP Key Tuning LARGE/SMALL Concentric Cursor Knobs5 C/N Com/Nav Key OBS KeyUSB Port Func Function KeyMON Monitor Key Power On Com RadioSelecting a Com Frequency Monitoring the Standby Com Channel Saving a Com ChannelAfter selecting the desired characters, press ENT After making a selection, press ENT DescriptionFrequency Database Reverse Look-Up Com Database Look-UpEmergency Channel Stuck MicRemote Frequency Selection Control Nav Radio Selecting a Nav FrequencySaving a Nav Channel 01-36 Listening to the Nav Audio Channel14 CDI Display OBS Mode15 DST Data Display Distance/Speed/Time DST DisplayThis page intentionally left blank Functions Description FunctionsCom Frequencies Recent Com FrequenciesTurn the Small knob to select an Entry Press the CLR key to delete this User frequency Com User FrequenciesFrequencies. Press ENT Editing a Com User FrequencyCom Database Frequencies Com Database FrequenciesNearest APT function. Then, press ENT Com Nearest Airports APTTurn Small Knob To Scroll Through Available Frequencies Com Nearest Area Control Center ACC Frequencies13 Com Nearest FSS Frequencies Com Nearest Flight Service Station FSS Frequencies14 Com Nearest Weather Frequencies Com Nearest Weather WX FrequenciesRecent Nav Frequencies Nav FrequenciesPress the ENT key to delete the displayed frequency Nav User FrequenciesEditing a Nav User Frequency 21 Nav Database Frequencies Nav Database FrequenciesNav Nearest VOR When duplicate identifiers are found, press ENTAdjust Intercom ICS ConfigurationTurn the Small knob to display the available VORs Functions displayTurn the Small knob to turn the Aux Audio On or Off Aux AudioSpeaker On/Off Intercom On/OffIntercom On/Off function. Then, press the ENT key Speaker On/Off function. Then, press ENTCom Spacing System Configuration34 Set Display Brightness Display BrightnessDatabase Info Display ContrastDisplay Contrast function. Then, press the ENT key Database Version function. Then, press the ENT keyLoad Database function. Then, press the ENT key Load DatabaseSerial Number Software VersionSoftware Version function. Then, press the ENT key Press the Func key to return to the main menuTimers Setting Up the Count Down TimerTo select a starting timer value Viewing Timers in the Com Display Setting Up the Count Up TimerPressing CLR and then ENT will reset the displayed Timer Pressing ENT twice will stop the displayed Timer48 Count Down Timer Value Now Counting Up This page intentionally left blank Appendix TroubleshootingOr disabled via a Remote mounted It can be enabledIf in Lock Out mode Calibration error Recalibrate resolverUpdating the Frequency Database Messages Switch has been Power has been Re-apply power to the unitVerify glideslope deviation Property withInstallations All installationsRemote com Been in pressedNav radio is Contact dealer for service Not communicatingProperty with System This page intentionally left blank Index Remote frequency control 2-5 Reverse look-up 2-4 Revisions