overvolts on G model

[wslade2]

Will your upgrade work with the zeftronic regulators? (My very first R&R was installing those and already invested in a set. Hate to go backwards to mechanical regulators.) I have low volt front winking at idle, disappears with increased throttle. Also new alternator, wiring and diode.

[mshac]

Originally Posted by wslade2

Will your upgrade work with the zeftronic regulators? (My very first R&R was installing those and already invested in a set. Hate to go backwards to mechanical regulators.) I have low volt front winking at idle, disappears with increased throttle. Also new alternator, wiring and diode.

Unfortunately it will not. The regulators must be designed to use the parallel circuit.

My understanding is that Zeftronics produces voltage regulators that incorporate the parallel circuit (that is so critical to balanced charging), but they would require a 337 field approval as well.

That fact that my system is basically copied from other certified twin Cessnas probably makes the 337 approval process a little easier. YMMV.

[Kim Geyer]

Check your over voltage sensor. I had one of our planes doing that and found a corroded pin

[wslade2]

Gotchya. I'm expecting it's corrosion somewhere and have been on the hunt for it when not dealing with other issues.

[sunnysky]

Just to let all out there know , I have resolved my overvolts issue.
The rear alternator was faulty . We found chaffed wires in it.
So , replaced it with a new Plane Power alternator at great expense ( we are in Europe)
Also replaced the diode on circuit board that sits on bulkhead in front engine compartment ,
In fact we replaced both front and rear diodes .(only cheap, even here)
System now works normally.
Hope this may be useful to others out there.

[edasmus]

Happy to hear your success! These planes are so enjoyable when all is right with the maintenance! Safe flying! 😊

[sunnysky]

Thank you Edasmus.
In fact you were on the money when you mentioned
those diodes in your earlier post.
about 20 years ago I replaced the whole circuit board due to
corrosion, so suppose those origonal diodes lasted well !
Cheers
Sunnysky