ADAHRS Fail Internal Error: Multiple Sensors

[704ch]

HI All,

I am running a 10 inch SKY View Classic that has ran great for over 10 years on my RV-7 and is now having issues. I have an audio failure that I have been living with for a year now, and just today when I went to fly I got the big red X and the message ADAHRs Fail message listed in my post title. Noting that this has been set up running great for years, and only now flagging errors does anyone know how to get more detail on this error?

Curious if this can be diagnosed to my Skyview unit itself, or the ADAHRS. I really doubt it is a connection or set up issue since it has had proven performance, so any ideas?

Also note that it looked to be working fine the first 5-8 seconds of boot up, showing current correct readings like OAT, Attitude etc, before flashing the big X.

Give me any thoughts on how to troubleshoot, or maybe I need to follow up with support?

More info on my plane and setup: http://www.704ch.com/

Thank You

 

[Rhino]

Don't doubt connection issues. In fact, they're far more likely over time, on all aircraft. I'd start there. Might be something as simple as a loose connector.

 

[704ch]

I will be checking the connections this weekend of course.

Does anyone know what all the sensers are on the ADAHRs? If I have multiple to check, it would be good to know the full set that I will need to be verifying.

I know Pitot static and OAT go into the ADAHRs as well as the Skyview Network Cable, what else should I be checking?

Is there a way to tell if it is an actual ADAHRs issue, or if it is the Skyview Unit/Network? If it is ADAHRs, is the only option to replace with New?

Thanks all

 

[Rhino]

Pitot, OAT and AOA if you have it.

Out of curiosity, have you performed any updates recently that may have something to do with this?

It appears to be an ADAHRS issue, but it's hard to say without checking things first. Dynon can tell you what your options are. They might be able to just repair it if needed. You'd need to contact them to get those answers. They might be able to give you better advice on troubleshooting as well.

 

[SkippyDiesel]

I am new to this Forum. My Dynon has the same failure sign as 704ch.
My unit failed between working just fine, shutdown, return next day and pre engine start, check of fuel quantities FAIL!.
Warm day about 38C
I guess I should be thankful that it didnt fail in the air.
Returned home and started looking for a solution
First idea - remove ADAHRS from location behind Sonex seats, so that I could plug in short lead - system fired up as normal.
Check installed (long lead) - all wires registered good conductivity - plugged in installed lead - system normal - Great!
Cooler in afternoon - sub 30C
Running out of daylight - returned next late morning
Reinstalled ADAHRS - temp above 30C -system failed!
Contacted Dynon Australia - download diagnostics from unit and send to Dynon USA
Seems that failure may be triggered by high air temperature.
Checked Dynon - specifications Max 70C storage and 60C running
Sent ADAHRS to Dynon USA - yet to receive any feedback
Dynon Australia has proactively sent me a loan unit - yet to install.
Anyone got any thought? Especially about the overtemperature theory?

 

[Rhino]

Put the loaner in and see if it changes anything.

 

[SkippyDiesel]

The "loaner" works just fine.

I am more intersted in any other failures that may be due to ambient temperature.

 

[Rhino]

Wiring issues can show up with temperature changes, particularly in connectors, but it isn't very common. It can also be very difficult to troubleshoot at times. I'd guess your issue is more likely something internal to that unit.

 

[SkippyDiesel]

Thanks Rhino.

I am astonished by the fantastic service provided by Dynon Australia & USA.
Not only did D. Australia proactively send me a "loaner" ADHARS, I found out yesterday that D. USA has repaired my unit and its on its way back and will be with me early next week.