EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 221-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
Century Autopilots only – pitch and roll the display by hand or use the EA100 tool to verify the
transformer junction box outputs are correct per Table below. This test will verify if the transformer
wiring and the settings are correct. It is recommended to use an oscilloscope to measure the outputs as
a DVM does not give reliable readings at 5khz. A ground test of the autopilot bank angle limit in HDG
mode should also verify proper wiring of at least the reference and roll circuits. About 20 degrees is
standard.
Century Autopilot Type
Pitch Output at 10°
(measure at TR1 or TR2 pin 3)
Roll Output at 20°
(measure at TR1 or TR2 pin 5)
21/31/41/2000/4000
60mV +/- 20mV
60mV +/- 20mV
IIB/III/IV
0.60Vp-p +/- 50mV
1.30Vp-p +/-50mV
CAUTION: If the outputs are not within range of the values in this table then inspect the TR box wiring
and settings to correct the issue.
All Autopilots
Power up the EFD. Close the AP AHRS circuit breaker. Power up the autopilot.
a)
Verify the AP AHRS FAIL light extinguishes.
b)
Press Menu on the EFD and then press the AHRS RESET button twice on the EFD. Verify the AP
AHRS FAIL light turns on and then goes back out after the AHRS resets.
c)
Engage the autopilot.
d)
Press the autopilot disconnect switch momentarily and verify the autopilot disengages.
e)
Engage the autopilot.
f)
Pull the A/P AHRS circuit breaker and verify the autopilot disengages. Verify the AP AHRS FAIL
light on the instrument panel illuminates.
g)
Verify the autopilot cannot be engaged as long as the A/P AHRS FAIL light is illuminated.
h)
Push in the A/P AHRS circuit breaker and after the A/P AHRS FAIL light goes out. Verify that
the autopilot can be re-engaged.
i)
Press the A/P AHRS FAIL light “press-to-test” switch and verify the lamp illuminates.
Using the EA100 Tool (see Tech Note 2010-10) or by pitching/rolling the EFD1000 connected to the
EA100, perform the following tests with the autopilot engaged in ATT Hold mode. For Century
autopilots the default mode will be HDG mode.
NOTE
When the EA100 Tool is running the A/P Engage relay and the A/P AHRS FAIL light relay are not
engaged. These must be engaged using the tool to extinguish the light and to be able to engage
the autopilot.
