DFC90 with Aspen
When connecting the DFC90 to the Aspen PFD, the Aspen may require an 'unlock'. This is the responsibility of the shop and not Avidyne.
Entegra EXP5000 PFD with DFC90 message bar dashed out
When installing the DFC90 into an approved aircraft, if you see the Entegra PFD Autopilot Message bar dashed out (see photo), you need to check the configuration of the AutoPilot in the PFD Maintenance Mode pages. Ensure the PFD has MOD55 (mandatory requirement for the DFC90), otherwise the DFC90 cannot communicate …
DFC Disconnects
Thank you for your reply and additional information. The most common cause of erratic DFC operation is the Start Voltages of the Roll and Pitch Trim Motors. A good Motor will begin to respond at around 2 Volts. Any voltage beyond 2.5 volts will cause erratic operation of the autopilot. The autopilot is also …
DFC90 Trim Tab Test
* With the aircraft in straight and level flight (hand flying) using the hat switch, roll the trim full left. Let go of the stick and count how long the aircraft takes to roll to the 45dg mark on the PFD (typically 3-5 secs). * Conduct the same test to the right. With the aircraft straight and level using the hat…
DFC90 Wings Level
Straight and Level - Pressing the "Straight and Level" button on the autopilot will result in a zero bank, +2 degree pitch angle attitude. It is not an altitude hold or a zero vertical speed mode, nor does it hold a heading. Depending on the power setting and aircraft configuration, this could produce a climb, stea…
EXP5000 PFD; ADAHRS Miscompare
The PFD Field Level Troubleshooting Guide P/N 600-00722-000 Rev 00 references ADAHRS Miscompare for a Dual PFD configuration. If you have a single PFD and a DFC90; refer to the DFC90 Install Manual 600-00251-000 Rev: 09 or later. Single PFD with a DFC90: Check the blind turn coordinator, the DFC90 is using this to…
DFC90 Self Test Fail
If you get a self test fail annunciation please have the following completed by an Avidyne dealer. 1. Verify Autopilot is properly seated in its tray. 2. Verify no Autopilot external devices has failed (i.e. trim/servo motors, turn coordinator, autopilot disconnect, trim/servo motor, etc.) If the above reaso…
How to tell if the DFC90 has had the TC/Gyro update
1. Power up the PFD and wait until the airspeed and altitude tapes are shown. 2. Enter system setup by simultaneously pressing and holding the top left (L1) and third down from the left top (L3) Line Select Keys until the countdown timer in the lower left corner of the display indicates zero. 3. Use the left …
DFC90/100 Servo Start Up Voltages - Cirrus and Piper
This should be tested using a variable DC power supply, connected as displayed in the image below: Once connected, begin at 0VDC and slowly increase voltage until the servo begins to respond. That will be your "start-up voltage." DFC90 Servo Start Up Voltages Roll Servo should be less than 3VDC Pitch Servo…
DFC90 Autopilot Disconnects
The DFC-90 requires Aircraft Power to be supplied to "A/P Disconnect" P1-17 and "Trim Interrupt " P2-14. If either input is missing the Autopilot will Disengage. The most common cause of DFC-90 problems is the connector mating into the old S-Tec 55x Tray. Insure that the unit is securely seated into the rack. …
