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  #1  
Old 09-03-2019, 05:51 PM
Ron B. Ron B. is offline
 
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Location: Yarmouth, Nova Scotia
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Default New 912 not charging

My 912 ULS isn't charging. Tonight I thought I had found the issue, no ground on the Mallory capacitor . But no luck. I'm wandering if running the engine without a ground fried something?
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  #2  
Old 09-03-2019, 08:14 PM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
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It is unlikely that the capacitor is the problem.
The most likely cause of charging system failure on the RV-12 is the Ducati voltage regulator.
Some RV-12 owners have replaced the Ducati with John Deere part number AM101406, or MIA881279.
If that is done, the connector will not fit and wires will have to be switched around.
Another option is to use a Silent Hektik regulator.
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  #3  
Old 09-03-2019, 08:15 PM
Mich48041 Mich48041 is offline
 
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Make sure that there is battery voltage on regulator terminal "C" When the master switch is turned on.
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  #4  
Old 09-04-2019, 03:26 AM
crashley crashley is offline
 
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Location: hazelwood north vic
Posts: 173
Default no charge

Can you give us a bit of history, your post title says new 912. is this a new plane with a new engine and you cant get any charge?
If this is the case you need to check all the wiring to try and find a fault
it is unlikely that the regulator has failed with no useage they do fail but not for a couple of hundred hours
Have you measured the volts out of the alternaltor before the regulator
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  #5  
Old 09-04-2019, 04:45 AM
Ron B. Ron B. is offline
 
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Yes new never flown. I'm just starting to search out the issue. I checked terminal "C" (with engine not running) and no voltage was found.
I find the plug (long black housing) on the Voltage regulator doesn't plug in well. One ear will catch and if you push in the other side the first one backs out.
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  #6  
Old 09-04-2019, 03:54 PM
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Tony_T Tony_T is offline
 
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Location: Lacey, WA
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Default RV-12 VR connector

As Joe says, the small yellow wire on the "C" terminal must have battery voltage on it when the Master is turned on.

The black connector can be problematic as you can't easily tell if all the connections are being made adequately. Consider removing the individual wire spades from the black connector, cover them with shrink wrap and push them on to the regulator individually. You can then tell by feel if they are tight.



In this photo you can also see a dedicated ground wire back to the battery negative. And I used nut plates on the panel base so the regulator mounting screws could be removed without removing the top instrument cover and longer screws with standoffs. This makes the regulator relatively easy to change in the event (likely) that it goes TU some time in the future. Carry a spare.
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  #7  
Old 09-04-2019, 04:59 PM
Ron B. Ron B. is offline
 
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Found my mistake in the wiring. I missed connecting the C terminal with the B and R (I think that was the two other terminals). I now have 12 V on the c terminal and a working charging system.
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  #8  
Old 09-04-2019, 05:06 PM
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Piper J3 Piper J3 is offline
 
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Quote:
Originally Posted by Tony_T View Post
This makes the regulator relatively easy to change in the event (likely) that it goes TU some time in the future. Carry a spare.
TU....?



I just figured it out....
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Jim Stricker
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EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
RV-12 E-LSA #120058 AWC July 2012 N633CM
RV-12 Bought Flying Oct 2015 with 48TT - Hobbs now 512

LSRM-A Certificate 2016
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
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Last edited by Piper J3 : 09-04-2019 at 05:08 PM. Reason: I just figured it out....
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  #9  
Old 09-04-2019, 07:08 PM
Driftdown Driftdown is offline
 
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Tupolev (Russian aerospace company).
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