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AEC 9005 Indicates Low Voltage, Perhaps Erroneously?

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email(at)jaredyates.com
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Posted: Fri Aug 12, 2016 1:35 pm Post subject: AEC 9005 Indicates Low Voltage, Perhaps Erroneously?

Flying today everything was normal, except that the low voltage light started to blink intermittently, then constantly. The Dynon D180 voltage indication was in the high 13 range, which isn't uncommon. It's usually in the 13.7-14.3 range, and the light has never come on with the engine running before. Is there a failure mode of the AEC 9005 that would cause it to indicate a low voltage so much higher than the intended 13, or should I believe the 9005 and suspect the D180? In all other cases the Dynon indications seem to be about right. The primary alternator is a Plane Power AL12-EI60/C.

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user9253

Joined: 28 Mar 2008
Posts: 1921
Location: Riley TWP Michigan

Posted: Fri Aug 12, 2016 2:00 pm Post subject: Re: AEC 9005 Indicates Low Voltage, Perhaps Erroneously?

It is unlikely that the D-180 is reporting the wrong voltage.

Suspect a poor electrical connection to the AEC 9005.

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_________________
Joe Gores

email(at)jaredyates.com
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Posted: Sat Aug 13, 2016 11:17 am Post subject: AEC 9005 Indicates Low Voltage, Perhaps Erroneously?

Thanks Bob, I'll see if I can measure voltage at the incoming pin as to isolate the wiring from the device. If the voltage there is on par with the Dynon indication, I'll send the unit over.



On Sat, Aug 13, 2016 at 1:21 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

 	  Quote: 	
		    At 04:33 PM 8/12/2016, you wrote:

  	  Quote: 	
		  Flying today everything was normal, except that the low voltage light started to blink intermittently, then constantly. The Dynon D180 voltage indication was in the high 13 range, which isn't uncommon. It's usually in the 13.7-14.3 range, and the light has never come on with the engine running before. Is there a failure mode of the AEC 9005 that would cause it to indicate a low voltage so much higher than the intended 13, or should I believe the 9005 and suspect the D180? In all other cases the Dynon indications seem to be about right. The primary alternator is a Plane PowerÂ AL12-EI60/C. 	


  This is difficult to diagnose without

  measurements.



  All AEC products have lifetime warranty.

  If you would priority mail your module

  to me, I'll check it on the acceptance test

  fixture, evaluate its performance and

  return it to you with any necessary

  repairs in place.



  We don't often get a chance to evaluate

  fielded products. I'd be pleased to assist

  by checking off at least one box in the

  troubleshooting process.



 



 

   Bob . . .

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