rotax 912 battery charging troubles

[karlhaagsma]

Currently trying to get through last 10% of build process. Zenith CH 701 with rotax 912 uls and Dynon Flightdek 180. Having problems which transpired at last runup. Electricals seem to be running well static. On battery with master on have incremental amps draw on dynon as well as what I think may be good voltage indication (on fully charged battery). Engine starts and runs fine. However, with engine running there is no appreciable amp draw (indicated) from accessories, unless I turn everything on, which in theory should draw about 12 amps, but maybe only indicates 3 amps tops, and then it is quite variable (mostly 0 amps). Also, it appears that there is no battery charging going on, as while engine is running with no accesories the voltage seems quite stable at about 13.9, but with accesories on it drops significantly to approx 12.1, and when back in static mode the voltage has dropped to same. Anyone have any ideas? May this be a voltage regulator problem? Please help. I have spent 6 years building this machine and now I am stymied in the final furlong. Best Regards, Karl Haagsma.

 

 

[driftamark]

Hi Karl to me it sounds as if all is working as it should , with eng running and inst on there should be not much power coming out of the battery or going into the battery 1 will flatten and the other will cook the battery so it appears that the regulator is doing its job. I may be corrected by others . Mark .

 

 

[cscotthendry]

Karl:

 

Any chance of posting a wiring diagram of what you actually wired up? Specifically it needs to be what is actually in the plane, not a wiring diagram that the kit manufacturer made unless it is EXACTLY the same (ie NO changes).

 

 

[Downunder]

http://www.recreationalflying.com/threads/rotax-912-battery-charging-troubles-ch-701.134203/#post-490221