Avidyne IFD540, Pilot'S Manual

Page: 309 / 334

6-49 General
COLD TEMPERATURE OPERATIONS
If the IFD had been exposed to extreme cold temperatures,
responsiveness of the display and to touch or bezel input may
take longer than normal until the IFD has warmed up.
LOW POWER OPERATIONS
The following actions are taken as input power is reduced to the
IFD:
Input Voltage IFD Operation Impact
19.9VDC 16W VHF radio output power reduces to
10W.
18VDC Lose high power (2.1A) USB charging. USB
charging reduces to 1A.
12.75VDC Lose all USB charging.
11.5VDC Bezel lighting and display lighting maximum
values are reduced.
10.9VDC VHF radio output power reduces to 6W.
10.0VDC VHF radio output power reduces to 4W.
9VDC 60-second countdown to IFD shutdown
begins (countdown message displayed on
the IFD).
6VDC – 8 VDC Internal components power down.
Function is restored by rising above those voltage thresholds by
1VDC for more than 1 second. A rapid decay below 10 VDC to 6-
8 VDC will result in a power down prior to the 60-sec countdown
being displayed or completed.