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1. 12:06 PM - Battery not charging (Paul Mansfield)
2. 01:29 PM - Re: Battery not charging (Temco)
Message 1
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| Subject: | Battery not charging |
I have just run my 912S (in a Europa) for the first time (with a Rotax engi
ne specialist doing all the work!)
The problem is the battery is not charging.
I have researched the subject and found a good looking guide here: http://p
ointsforpilots.blogspot.com/2012/12/testing-rotax-912914-generator-and.html
These are the results:
Testing Generator
Result
Pull off the 2 yellow wires from G terminals.
With engine off and Master switch off, resistance between the two wires sho
uld be 0.1 - 0.8 Ohm.
0.5 - 0.8
Resistance between either wire and ground should be infinite; that is, ther
e is an open circuit.
-1
(is this infinite?)
With engine running and the two wires still off the regulator, test AC volt
age between the two wires.
It should be:
15 - 20 VAC during idle
14.6
2000 rpm
Almost 15!
30 - 40 VAC during high rpm
24.4
3300 rpm
Almost 30!
Testing Capacitor
Result
If the resistance between the plus and minus poles of the capacitor is not
infinite, that is, it is not an open circuit, then the capacitor has failed
and must be replaced.
-1
(is this infinite?)
Testing Regulator/Rectifier
Result
With Master switch on: Measure the voltage between ground and the wire on t
he R, B+ & C terminals in turn; it should be the battery voltage, about 12.
5 VDC.
R
0.02
B+
0.02
C
0.02
With Master switch off: The above test should show 0 voltage for all three
cases.
R
0
B+
0
C
0
Test that housing of regulator/rectifier is properly grounded:
Resistance between regulator housing and battery ground should be essential
ly 0.
0
If the wiring fails any of the above tests, the wiring problem needs to be
isolated and fixed.
If the wiring passes the above tests, yet output voltage of the regulator/r
ectifier is not in the normal range, then the regulator/rectifier likely is
faulty and should be replaced.
My understanding is that this is a wiring problem, no voltage is getting to
the reg/rect... but I am worse than a novice at this - a little knowledge
is a dangerous thing!
The aircraft is wired basically according to the Europa build manual (below
or attached, depending how you are viewing this).
Any clues as to where I should begin looking?
Many thanks in advance,
Paul M
Europa XS 383
912S
[cid:image001.png@01D4301C.6E415560]
Message 2
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| Subject: | Re: Battery not charging |
Hello Paul
It would appear that the AC part of your system is working ok. What DC voltage
do you get when you put the positive probe on the Reg +B and and the black probe
on system ground? This should be about 13.4 to about 14.2 VDC depending on
the RPM of the engine, From you diagram, I do not see where the regulator is
attached to system ground. Is the case of the regulator intended to be connected
to system ground or was term L or R intended to be system ground?? Your capacitor
is grounded but there is no indication of how the regulator ground circuit
is completed??
Ted
Kitfox IV
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