I’m curious about it happening at the same time each day. I think that is a big clue. Could it be some other interference from some other electrical part? Motors etc? And what about if its heat related? IE the roof/modules heating up causing the issue?
Curious. jay peltz power > On Jul 24, 2016, at 8:37 AM, Drake <drake.chamber...@redwoodalliance.org> > wrote: > > It could easily be a nuisance trip rather than any problem. For sure, you > want to check for possible problems. Big metal roofs are prone to nuisance > tripping of the SMA AFCIs. I've been through this. > > At 09:35 PM 7/23/2016, you wrote: >> Content-Type: multipart/alternative; >> boundary="----=_NextPart_000_0001_01D1E52A.1853FE80" >> Content-Language: en-us >> >> Hi Jerry, >> >> It passes the initial power up tests fine, and fails at almost the same time >> of day when it faults with a 4301 Electric Arc Detected. Not usually the >> next day, often it will be fine for a week or so. >> According to the web box, the inverter has the latest available firmware. >> I am hoping it is a failure at a splice in a rooftop jbox (all are exposed >> on the ridge). >> I went there last week, but the customer office manager decided she wanted a >> written safety plan before she was comfortable letting me climb on the roof, >> so I am cogitating on that. >> >> Thanks for your thoughts. >> Glenn >> >> From: Jerry Shafer [ mailto:jerrysgarag...@gmail.com >> <mailto:jerrysgarag...@gmail.com>] >> Sent: Friday, July 22, 2016 11:05 PM >> To: RE-wrenches; glenn.b...@glbcc.com >> Subject: Re: [RE-wrenches] Replacing grounded inverters >> >> >> Question, is it the first test where it is checking for noise in the system >> or is it finding a fault once it is running. Does it have the latest >> software update, which code do you have test failure or arc failt detected, >> way different trouble shooting tracks yo follow. If it is a test fail try to >> remove just the ground wire from the array, because its a metal roof its a >> big antenna and hears something that is to much for the test to deal with. >> If it fails due to an arc then there is most likely an arc at a connection. >> >> Jerry >> >> On Jul 22, 2016 3:37 PM, "Glenn Burt" <glenn.b...@glbcc.com >> <mailto:glenn.b...@glbcc.com>> wrote: >> August, >> >> I am currently chasing down unexplained AFCI faults with old SX 160 modules >> on a metal roof and having replaced two SMA SWR-2500Uâs with a SB >> 5000TL-US-22. So far I have been swapping input strings to see if there is a >> pattern, however no joy. >> Next visit is up on the roof (steep pitch) to see if there is anything >> obvious. >> I hate to simply disable the AFCI functionality without a serious effort, >> however I am approaching that point. >> It is a T&M job for a system installed by others back in 2004, about an hour >> trip 1 way and I am afraid the customer will soon believe I am stringing out >> the work. >> >> Looking forward to hearing more of your experience as it develops! >> >> -Glenn >> >> From: RE-wrenches [ mailto:re-wrenches-boun...@lists.re-wrenches.org >> <mailto:re-wrenches-boun...@lists.re-wrenches.org>] On Behalf Of August Goers >> Sent: Friday, July 22, 2016 10:23 AM >> To: RE-wrenches >> Subject: Re: [RE-wrenches] Replacing grounded inverters >> >> Glen, >> >> Itâs interesting you mention that youâre having AFCI issues with new TL >> inverters and old modules. We are too. We have a particular system with BP >> modules where weâre trying to figure out if we have a warranty claim >> situation. Weâve cleaned up all the DC-side wiring and still the Sunny Boy >> is tripping with AFCI errors. We think it is either corroded traces in the >> modules or perhaps bypass diode issues in the module j-boxes. More to come. >> >> August >> >> From: RE-wrenches [ mailto:re-wrenches-boun...@lists.re-wrenches.org >> <mailto:re-wrenches-boun...@lists.re-wrenches.org>] On Behalf Of Glenn Burt >> Sent: Friday, July 22, 2016 5:08 AM >> To: RE-wrenches >> Subject: Re: [RE-wrenches] Replacing grounded inverters >> >> If you read some of the proposed changes for the 2017 NEC, it is looking >> life there will be no problem replacing isolated inverters with non-isolated >> versions. In fact the proposed wording seems to allow either USE, or PV wire >> to be used with non-isolated inverters explicitly going forward. >> It made me feel better about doing recent replacements. >> I'm having more trouble with the TL inverters and AFCI issues on older >> systems, however. >> From: Gary at Santa Ynez Valley Solar <mailto:g...@syvsolar.com> >> Sent: â7/â21/â2016 21:43 >> To: re-wrenches@lists.re-wrenches.org >> <mailto:re-wrenches@lists.re-wrenches.org> >> Subject: [RE-wrenches] Replacing grounded inverters >> We are all facing having to replace the old transformer based inverters when >> they run out. Really difficult to find replacements. Against code to replace >> with transformer less ones. I wonder if a DC/DC transformer could be >> installed just ahead of the transformer less inverter for isolation >> purposes? Not clear on the concept. >> >> >> Gary >> >> >> Gary Gordon >> >> >> www.SYVSolar.com <http://www.syvsolar.com/> >> PO Box 688 >> Santa Ynez, CA 93460 >> 805 688-1213 <tel:805%20688-1213> >> NABCEP Certified Installer >> CA Licensed Solar Contractor >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> <mailto:RE-wrenches@lists.re-wrenches.org> >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> >> >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> >> >> Check out or update participant bios: >> www.members.re-wrenches.org <http://www.members.re-wrenches.org/> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> >> >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> <http://www.members.re-wrenches.org/>_______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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