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Z19 first try and smoke/wire melted I did a mistake

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nuckolls.bob(at)aeroelect
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Posted: Sat Jun 16, 2018 3:12 pm Post subject: Z19 first try and smoke/wire melted I did a mistake

 	  Quote: 	
		  

 After that I investiguate quickly, and I find that I set the polarity on the wrong way. I set it in the good one.



 Same result ! Wire coming red without no more insulation.



 My first question is :



 - my IFF/Radio/electronics ignitions and all the electronics parts are good to the bin ? (I have a Trig S mode... new electronics Ignitions) wire like the Z19 with a diode and without avionics switch like the Z19.



 - Why I have in the bad polarity, but also in the good this wire that is comming hot and red ? 



 - I spoke about the electronics instruments, but the others wires could be damage as the wire spoke above ? 



 If you have some advise for the next step for me... I will appreciate  [Rolling Eyes] 	


  The first event probably shorted the diode across

  the coil since it was in a FORWARD conduction mode.

  Correcting the battery connection produced a similar

  event because the diode was shorted.



  Now, the good news. Since the diode fused and became

  a 'wire burner', the contactor did not close. Similarly,

  even with the proper battery connection, the shorted diode

  kept the contactor from closing once again and only

  the wiring was abused.



  Replace the diode and any smoked wires. I'm hopeful that

  the rest of your electrowhizzies are okay. 



 

 

   Bob . . .

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Achille

Joined: 12 Jun 2017
Posts: 25
Location: Europe

Posted: Sat Jun 16, 2018 5:56 pm Post subject: Re: Z19 first try and smoke/wire melted I did a mistake

Thank you bob for you reply. I hope to find just the diode end the wire U/S. Many thanks.



I have to check just the intégrity of contactor ground wire (master switch to the ground bus) easily accessible or I could have other wire damaged ? 

Because all my wires are set in harness with sleeve. 



About the possible damage, with luck just this wire and diode. But without 

Alternator diode couldn't be damage at least ? and my ignitions and transpondeur ? (I checked on the user manuel they told that inversion of polarity damage it) But in the case of switch was in OFF on the transpondeur (for exemple) it can damage it ? (I ask the question because I was doing a quote of my error to be prepared in the event of I have to change part.. and total price become quickly crazy)

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