EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 181-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
System Troubleshooting –continued
Fault
Cause
Corrective Action
Display does not power on
(
Note: there can be up to a
20 second delay from the
application of power to a
visible display)
a) EFD missing A/C power
a) Check EFD circuit breaker, EFD on/off
switch on panel, wiring, and A/C battery
voltage > 11.5 volts.
b) EFD may have been
improperly shut down
b) Switch unit off using “REV” button or
“SHUT DOWN” command from Main Menu
page 6.
c) EFD missing A/C ground
c) Check wiring to EFD
d) EFD is defective
d) Repair or replace EFD
Display does not power off
(
Note: EFD will switch to
internal battery if airspeed
is greater than 30kts.)
a) Airspeed is above 30kts
a) Normal operation
b) EFD may have been
switched to internal
battery
b) Switch unit off using “REV” button or
“SHUT DOWN” command from Main Menu
page 6.
c) EFD may have been
improperly shut down
c) Hold “REV” button for 20 seconds or
unplug EFD internal battery for 3 seconds
d) EFD is defective
d) Repair or replace EFD
Display flashes on/off,
black/white or blue/white
repetitively
a) Configuration Module
unplugged or miss wired
a) Check CM plug and wiring from EFD to
CM
b) RSM or CM wiring short
b) Verify RSM pin 6 or CM pin 1 is not
shorted to aircraft ground or another pin.
c) Configuration module
defective
c) Repair or replace CM
d) EFD defective
d) Repair or replace EFD
ALTIMETER, AIRSPEED, VSI
FAIL (RED-X)
a) Air data sensor has not
had sufficient warm-up
time.
a) Allow up to 20 minutes at temps below -
20ºC for flags to clear
b) Pitot/static lines reversed b) Connect pitot line to “P” port and static
line to “S” port on EFD
c) Air data sensor failed
c) Repair or replace EFD
ATTITUDE FAIL or
DIRECTION FAIL ( RED-X)
(
Note: Attitude flags could
take up to 3 minutes to
clear at temps below -
20ºC)
a) AHRS sensor has not
completed initialization.
a) Allow up to 3 minutes for AHRS to
initialize.
b) RSM failed/data missing. b) Check RSM to EFD wiring. Repair or
replace RSM.
c) Pitot and/or Static lines
crossed, unplugged, or
blocked.
c) Correct pitot/static plumbing issue.
d) EFD is defective
d) Repair or replace EFD.