Need some help from the brain trust.
First my setup.
I got a standard alternator (for IO360 M1B from Vans) an EarthX battery a VP-X pro and a Dynon (including there transponder) as well as a Garmin SL40 radio.
This setup has been working without any issues for close to 4 years now.
So about a week ago the Dynon gave me a warning that I had a short on my transponder which is mounted in the back of my RV-8 with the VP-X in the front.
Couldn't reproduce it on the ground no matter what I tried. As those things usually don't fix themselves I took the panels off and checked the connectors (took them apart) on both side as well as the wire. Couldn't find anything. (checked it twice ...).
So I put everything back together and did another testflight. Worked all fine on the ground but when I was up in the air the transponder indicated short on the VP-X again.
Now I couldn't even reset the short via a Dynon on the VP-X. Then I noticed one thing. If I switched the alternator off I could reset the transponder and it would not trip again.
When I switched the alternator back on not only the transponder showed a short, the radio which has a 100% diverse wiring path showed one too.
When I experimented a bit more I noticed that when the current from the alternator is low there are no issues but if it's high (like the first few minutes after you start the engine and it recharges the battery) there is an issue.
So at this point I am inclined to believe there is no real short and the problem is either with the alternator, the VP-X or the ErathX. Here the 3 theories:
1. VP-X is broken (I have a request in with VP-X support to see what they think).
2. The Alternator is somehow broken and causes the VP-X to be confused triggering there short protection.
3. The protection circuit on the EarthX is somehow broken causing the alternator to cause spikes which confuses the VP-X
Question is what to do next?
Thx
Oliver
First my setup.
I got a standard alternator (for IO360 M1B from Vans) an EarthX battery a VP-X pro and a Dynon (including there transponder) as well as a Garmin SL40 radio.
This setup has been working without any issues for close to 4 years now.
So about a week ago the Dynon gave me a warning that I had a short on my transponder which is mounted in the back of my RV-8 with the VP-X in the front.
Couldn't reproduce it on the ground no matter what I tried. As those things usually don't fix themselves I took the panels off and checked the connectors (took them apart) on both side as well as the wire. Couldn't find anything. (checked it twice ...).
So I put everything back together and did another testflight. Worked all fine on the ground but when I was up in the air the transponder indicated short on the VP-X again.
Now I couldn't even reset the short via a Dynon on the VP-X. Then I noticed one thing. If I switched the alternator off I could reset the transponder and it would not trip again.
When I switched the alternator back on not only the transponder showed a short, the radio which has a 100% diverse wiring path showed one too.
When I experimented a bit more I noticed that when the current from the alternator is low there are no issues but if it's high (like the first few minutes after you start the engine and it recharges the battery) there is an issue.
So at this point I am inclined to believe there is no real short and the problem is either with the alternator, the VP-X or the ErathX. Here the 3 theories:
1. VP-X is broken (I have a request in with VP-X support to see what they think).
2. The Alternator is somehow broken and causes the VP-X to be confused triggering there short protection.
3. The protection circuit on the EarthX is somehow broken causing the alternator to cause spikes which confuses the VP-X
Question is what to do next?
Thx
Oliver