Was it raining on the days you got the error? We had that problem on a system during low light (beginning or end of a day) on days when it was raining (although I think it was actually an arc fault message). It was unrelated to an RSB (didn't exist yet). There is a thread about it here somewhere I could try and dig up...
On Fri, Sep 29, 2017 at 5:32 PM Bruce Erickson <[email protected]> wrote: > Hi All, > > I’m wondering if anyone else is having trouble with the SMA Rapid Shutdown > Box. We have an installation where an SMA 7700TL-US-22 (rebranded as > SunPower) is fed by an array with a Rapid Shutdown Box. Many, but not all, > mornings, the inverter would fail the AFCI self-test on wakeup. When reset, > it would operate fine all day. There was never an actual indication of an > arc fault, just the self-test failure. SunPower, in consultation with SMA, > decided to replace the inverter. Everything worked normally for a couple of > weeks, then the problem resumed. Again, no arc-fault indication, just the > self-test failure and then full operation the rest of the day after > resetting. > > We began to suspect the Rapid Shutdown Box, so we bypassed it completely, > and there were absolutely no problems for several weeks. SMA was then > willing to replace the RSB, after which everything worked fine for about a > week, then this morning the same issue. Again, self-test failure, then when > reset, it has to go through another self-test, which it always passes and > then runs all day. > Has anyone had problems with the RSB, or, with AFCI in general? > > Based on this experience, this is the second and last RSB we’ve used, and > have somewhat reluctantly gone to all micro inverters to meet rapid > shutdown. > > Bruce Erickson > Mendocino Solar Service > PO Box 1252 > Mendocino, CA 95460 > 707-937-1701 > 707-937-1741 fax > [email protected] > > Connecting Mendocino County to Solar Since 1994 > > > > > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > -- Adam Katzman Autonomous Energies PO Box 1245 Kingston, NY 12402 www.autonomousenergies.com (518) 567-1468 _______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
