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keithhickling(at)clear.ne
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 Posted: Sun May 02, 2010 12:38 am Post subject: Overvoltage problem with regulator |
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Hello all,
After all the discussion about lack of charging, I have just developed an
overvoltage problem after 100 hrs. The regulator has functioned fine until
tle last couple of flights, when I noticed that the voltmeter was flicking
up and down once or twice a second around a mean of about 13 volts. Then
today just before shutting the engine down, I noticed it was reading 16 - 17
volts on idle, and when I increased to 300 rpm it went up to 18 volts, with
the battery ammeter showing a small charge (half amp). So I suut the engine
down and looked under the cowl, and superficially all looked well with the
regulator and wiring. I didn't have a voltmeter with me, but will check the
connections tomorrow.
The regulator is wired as on the Europa diagramme, with the R, B+ and C
leads all connected together and to the + terminal of the capacitor, and
through the 30 amp fuse to the main bus via an alternator output switch.
I'd be very grateful for any suggestions / comments from the pundits - does
this have to be a regulator problem, or can any wiring or connection issues
cause this problem? I'll check that I have battery voltage at the C terminal
tomorrow, but the connections looked fine.
Many thanks in anticipation,
Keith Hickling,
New Zealand.
Kit 613, 912 uls.
[quote][b]
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jpg12305
Joined: 16 Jul 2008
Posts: 23
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| Posted: Sun May 02, 2010 4:51 am Post subject: Re: Overvoltage problem with regulator |
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I had such erratic fluctuations once in the past after an annual inspection.
I took me a while... to simply discover that my ground connection to the battery was loose. The battery was not playing its buffer role.
I understand you can see some current going to the battery, but there could be some connection to clean or tighten.
Just my own experience.
Good luck,
Jean-Paul
Europa 332 - France
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