IFD500 Series Pilot Guide
General 7-25
IFD on board battery requires
replacement
The on-board battery used for maintaining system time
during power-off periods is no longer performing that
function. IFD performance, such as datalink and GPS
acquisition, will be degraded. Contact the Avidyne Service
Center for service.
Selected course / DTK mismatch
The selected course on the external course pointer is more
than 10 degrees off of desired track <x> and the aircraft
course is within 3 degrees of that desired track. Adjust the
course knob as directed. Only displayed in GPS mode.
The user configurable "switch tanks" timer has expired. The
time between advisories is controlled using the Setup page.
The next leg is a hold with a teardrop entry and there are 30
seconds or less until the aircraft reaches the hold fix.
The aircraft will intercept a TFR within 5 minutes (±30
seconds). This advisory can be enabled or disabled on the
Setup Page.
The generic countdown timer has expired.
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