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billhuntersemail(at)gmail
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 Posted: Sat Mar 24, 2018 3:45 pm Post subject: SD-20 Troubleshooting |
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Hi All,
I was hoping I could talk you into helping me troubleshoot an SD-20 with a LR3C-14 Voltage Regulator.
Prior to this issue the alternator would produce 14.4 volts and about 10 amsp in cruise flight and other times when the engine is turning quickly. The isolated bus that is powered by this system is now showing 12.2 volts and 4.5 amps and then slowly the volts on that bus keep dropping so it is obvious that the alternator is not charging.
The bus that it is powering is small and the only items being powered in cruise flight are the following (amps listed are the absolute max that the appliance will be pulling):
VOLT REG SENSE 2 LR3C-14 Voltage Regulator BUS VOLTAGE SENSE
VOLT REG FIELD 5 VOLTAGE REGULATOR FIELD
Dynon SV-1000 5 SV-D1000 10" SKYVIEW DISPLAY
SV COM RADIO 5 SV-COM-425 0.2amp RCV 3 amp XMT
SV-AP SERVO 5 SV-AP SERVO Pitch servo 2 amps when MAX torque
Roll servo 2 amps when MAX torque
SV-AP POWER 3 SV-AP UNIT
Can someone please provide me with some troubleshooting advice?
..
Cheers!!!
Bill Hunter
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user9253
Joined: 28 Mar 2008
Posts: 1924
Location: Riley TWP Michigan
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billhuntersemail(at)gmail
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| Posted: Sat Mar 24, 2018 7:09 pm Post subject: SD-20 Troubleshooting |
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Thanks Joe... greatly appreciated
Thanks,
Bill Hunter
On Sat, Mar 24, 2018, 20:06 user9253 <fransew(at)gmail.com (fransew(at)gmail.com)> wrote:
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Mauledriver(at)nc.rr.com
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| Posted: Tue Mar 27, 2018 11:00 am Post subject: SD-20 Troubleshooting |
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I just went through the troubleshooting for that same configuration. After doing the procedure for the LR3, one finding didn't match the spec. I reviewed the results with B&C and they were able to tell me with confidence the LR3 failed (1,000 hours) - could be repaired or new. All good now.
On 3/24/2018 11:08 PM, William Hunter wrote:
| Quote: | Thanks Joe... greatly appreciated
Thanks,
Bill Hunter
On Sat, Mar 24, 2018, 20:06 user9253 <fransew(at)gmail.com (fransew(at)gmail.com)> wrote:
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This email has been checked for viruses by Avast antivirus software.
www.avast.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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trigo(at)mail.telepac.pt
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| Posted: Tue Mar 27, 2018 2:32 pm Post subject: SD-20 Troubleshooting |
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So now you are Bill problem solved Watson, right?
Couldn’t resist
Carlos
Enviado do meu iPhone
No dia 27/03/2018, às 19:59, Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> escreveu:
| Quote: | I just went through the troubleshooting for that same configuration. After doing the procedure for the LR3, one finding didn't match the spec. I reviewed the results with B&C and they were able to tell me with confidence the LR3 failed (1,000 hours) - could be repaired or new. All good now.
On 3/24/2018 11:08 PM, William Hunter wrote:
| Quote: | Thanks Joe... greatly appreciated
Thanks,
Bill Hunter
On Sat, Mar 24, 2018, 20:06 user9253 <fransew(at)gmail.com (fransew(at)gmail.com)> wrote:
|
This email has been checked for viruses by Avast antivirus software.
www.avast.com
[url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
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Mauledriver(at)nc.rr.com
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| Posted: Fri Mar 30, 2018 5:07 am Post subject: SD-20 Troubleshooting |
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I'm not keeping up the tradition.... I'll have to work on that.
On 3/27/2018 5:45 PM, Carlos Trigo wrote:
| Quote: | So now you are Bill problem solved Watson, right?
Couldn’t resist
Carlos
Enviado do meu iPhone
No dia 27/03/2018, às 19:59, Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> escreveu:
| Quote: | I just went through the troubleshooting for that same configuration. After doing the procedure for the LR3, one finding didn't match the spec. I reviewed the results with B&C and they were able to tell me with confidence the LR3 failed (1,000 hours) - could be repaired or new. All good now.
On 3/24/2018 11:08 PM, William Hunter wrote:
| Quote: | Thanks Joe... greatly appreciated
Thanks,
Bill Hunter
On Sat, Mar 24, 2018, 20:06 user9253 <fransew(at)gmail.com (fransew(at)gmail.com)> wrote:
|
This email has been checked for viruses by Avast antivirus software.
www.avast.com
[url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]
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do not archive
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
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