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SD-20 Troubleshooting

 
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billhuntersemail(at)gmail
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PostPosted: Sat Mar 24, 2018 3:45 pm    Post subject: SD-20 Troubleshooting Reply with quote

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: 1907
Location: Riley TWP Michigan

PostPosted: Sat Mar 24, 2018 7:01 pm    Post subject: Re: SD-20 Troubleshooting Reply with quote

Do you have the B and C trouble shooting manual?
http://www.bandc.aero/pdfs/BC410-H_Technical_Manual.pdf

There is also a troubleshooting guide in the LR3C Manual.
http://www.bandc.aero/pdfs/LR3C_Installation_Manual.pdf#page=8


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billhuntersemail(at)gmail
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PostPosted: Sat Mar 24, 2018 7:09 pm    Post subject: SD-20 Troubleshooting Reply with 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:

Quote:
--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>

Do you have the B and C trouble shooting manual?
http://www.bandc.aero/pdfs/BC410-H_Technical_Manual.pdf

There is also a troubleshooting guide in the LR3C Manual.
http://www.bandc.aero/pdfs/LR3C_Installation_Manual.pdf#page=8

--------
Joe Gores




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=478857#478857






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Mauledriver(at)nc.rr.com
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PostPosted: Tue Mar 27, 2018 11:00 am    Post subject: SD-20 Troubleshooting Reply with 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:

Quote:
--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>

Do you have the B and C trouble shooting manual?
http://www.bandc.aero/pdfs/BC410-H_Technical_Manual.pdf

There is also a troubleshooting guide in the LR3C Manual.
http://www.bandc.aero/pdfs/LR3C_Installation_Manual.pdf#page=8

--------
Joe Gores




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=478857#478857






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trigo(at)mail.telepac.pt
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PostPosted: Tue Mar 27, 2018 2:32 pm    Post subject: SD-20 Troubleshooting Reply with 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:

Quote:
--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>

Do you have the B and C trouble shooting manual?
http://www.bandc.aero/pdfs/BC410-H_Technical_Manual.pdf

There is also a troubleshooting guide in the LR3C Manual.
http://www.bandc.aero/pdfs/LR3C_Installation_Manual.pdf#page=8

--------
Joe Gores




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=478857#478857






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Mauledriver(at)nc.rr.com
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PostPosted: Fri Mar 30, 2018 5:07 am    Post subject: SD-20 Troubleshooting Reply with quote

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:

Quote:
--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>

Do you have the B and C trouble shooting manual?
http://www.bandc.aero/pdfs/BC410-H_Technical_Manual.pdf

There is also a troubleshooting guide in the LR3C Manual.
http://www.bandc.aero/pdfs/LR3C_Installation_Manual.pdf#page=8

--------
Joe Gores




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=478857#478857






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errer noreferrer" target="_blank">http://wiki.matronics.com
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          -Matt Dralle, List Admin.
rel="noreferrer noreferrer" target="_blank">http://www.matronics.com/contribution
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