Overvoltage Protection; Gps Failures And Rsm Emergency Gps Use - Aspen Avionics Evolution Backup Display EFD1000 Pilot's Manual

6.5.1. Overvoltage Protection

In the event of an overvoltage condition in the aircraft's electrical system, (greater
than 33 volts) the EBD will automatically switch to its battery power and continue to
operate without any pilot action. Operation from the aircraft electrical system will not
be possible while the overvoltage condition is present. When aircraft power decreases
below 33 volts, pilot action is required to manually switch from the EBD battery power.
Restore Aircraft Power to the EBD
1. Press the MENU Button and rotate the Top Knob to the POWER Settings
page
2. Press the EXT PWR Menu Key
3. Press the MENU Button to exit

6.6. GPS Failures and RSM Emergency GPS Use

Position and flight plan data for the PFD is provided from aircraft panel-mounted GPS
equipment. The PFD may be configured to receive data from one or two external GPS
receivers. In addition, if all aircraft GPS receivers fail, the RSM's emergency GPS receiver
will provide position data if enabled by the installer.
The Basemap will follow an automatic position reversion scheme to determine which
GPS is used to provide position data to the map. The primary GPS is always the one
selected by the pilot using CDI Navigation Source Select Button. If the selected GPS
fails, the PFD automatically switches to the other aircraft's GPS (if installed) and will
annunciate GPS# REVERSION, where # represents the GPS source providing the position
data (Figure 6-22).
091-00027-001 REV A
091-00027-001 Rev A EBD Pilots Guide V&H .indb 11
Evolution Backup Display Pilot's Guide
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8/27/14 8:51 AM