Avidyne FlightMax EX500, Pilot'S Manual, Page: 37 / 184

Errors Displayed on the Map Page
600-00078-001 Rev 05 -25- Avidyne EX500/EX600 MFD
2.5 Errors Displayed on the Map Page
2.5.1 Loss of GPS Input
The loss of primary GPS on the EX500/EX600 is shown as follows:
1) The aircraft symbol is removed.
2) There is no heading information displayed (if GPS has been
selected as your heading source/track).
3) The desired track icon is removed from the compass range ring.
4) There is no groundspeed information displayed.
The EX500/EX600 will continue to provide Datalink weather for your
flight based on the last known GPS track and groundspeed. If the
primary GPS fails during the flight, and you have a second GPS
connected to the EX500, you can switch your GPS input to the
backup source by pressing the
Nav Src key on the Aux page.
2.5.2 Loss of Heading Input
The source of heading data on your aircraft depends on the other
sensors you have installed in your aircraft. Loss of heading is typically
associated with the failure of one of the following:
1) The WX-500 Stormscope system (if installed and a heading
source is connected to the WX-500).
2) The Skywatch system (if installed and a heading source is
connected to the TAS).
3) A separate heading Synchro (if installed).
4) An Avidyne PFD.
5) The GPS (This would be a pass through. The GPS does not
determine heading).
Loss of heading will be shown in the following ways:
●
The heading indicator will be blank.
●
A “Heading source invalid” message will be displayed.
●
The aircraft symbol will change to a plus (“+”) sign (non-
directional).
●
The map display orientation will change to North-up.
●
The heading block value will be dashed (“- - -”).