nuckolls.bob(at)aeroelect
Guest
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 Posted: Fri Oct 21, 2011 10:05 pm Post subject: Jabiru Voltage Regulator Low Voltage Light |
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At 09:33 AM 10/21/2011, you wrote:
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Hi!
I started my Jabiru 3300 for the first time a couple days ago. Here's a link:
http://www.youtube.com/watch?v=qB0qe9uE1vQ
I found out that I need to reprogram my MGL EFIS, but also my LV
indicator light acted unexpectedly. I have the stock voltage
regulator which has 6 leads. They say to connect the green one to a
LV light, which I did. A fuslink then a 22awg wire takes it back to
the panel where I've got it wired to a red LED light and grounded to
the panel ground buss. I've got a reverse diode wired across the LED
also. My master switch is a 2-10, Off-Bat only-Bat+Alt. With the
engine off (no alternator), the LV light is brightly lit in both the
Bat only and Bat+Alt positions. With the engine running and the
alternator offline, the light is also brightly lit. So far so good.
But when I add the alternator, the light dims about halfway. I
expected it to be off. This was at high idle, 900 RPM. The EFIS
showed a supply voltage of 12.8V at this time. Would I expect to see
the light go out at higher rpm? If not, is there a way to make the
dimmed light go out when the alternator is online, and allow a
bright light to come through when the alternator is offline?
My MGL Enigma EFIS has an alarm that can be set for LV, so the
indicator light is a backup. If I can't fix it, I'd just disconnect
it, or wire it to the EFIS for a general warning light that would
come on for any alarm.
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As a general rule, warning lights built into
most regulators are NOT driven by true LV
warning systems. Suggest you ingnore the
lamp terminal and install a real LV warning
system . . . if your EFIS has an LV warning
then the one in the regulator is redundant.
Bob . . .
Bob . . .
////
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< Go ahead, make my day . . . >
< show me where I'm wrong. >
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