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Anyone have a Dynon system and a VP-X Pro?

A

andyhudson

Member
I have a dual 10" Dynon classic installed and the MFD was recently sent for repair and came back fine. However, it's now auto-powering down and the VP-X is tripping, due to over-drawing I assume. I have a new backup battery installed and I just did the backup battery tests and everything turned out fine. But when I went to fly again, the MFD gave me a VP-X error and despite resetting the VP-X circuit, the MFD still wants to shut down. Anyone know what's going on? The PFD is fine, no issues. I am confused and will call Dynon this week...
 
andyhudson said:
I have a dual 10" Dynon classic installed and the MFD was recently sent for repair and came back fine. However, it's now auto-powering down and the VP-X is tripping, due to over-drawing I assume. I have a new backup battery installed and I just did the backup battery tests and everything turned out fine. But when I went to fly again, the MFD gave me a VP-X error and despite resetting the VP-X circuit, the MFD still wants to shut down. Anyone know what's going on? The PFD is fine, no issues. I am confused and will call Dynon this week...
Click to expand...
Could you have bent a pin over in the main harness? I have had that happen.
 
Check your alternator for spiking overcharge. You will need an oscilloscope/Crow for this.

Particularly if the alternator is a Plane Power. The VPX will trip when it monitors an overcharge spike.
 
jaradtke said:
Could you have bent a pin over in the main harness? I have had that happen.
Click to expand...
Found the issue... there was no power going to the backup battery from the MFD Dynon screen (I have two 10" screens, this was the MFD - the right side screen). I simply removed the backup battery for now because I need to trace the connection and determine where the break in the wiring is that is not allowing power to get to the backup battery. The main 32-pin connector to the back of the Dynon screen looks fine and everything works when I put the MFD in the PFD slot and hookup the PFD's backup battery, so I KNOW it has to be the wiring in the connector from the MFD to the backup battery somehow. That's gonna be fun to trace...
 
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