I recently replaced a SB1800U with a refurbished model, but Solar Cowboyz did a good job of phone advice first, then bench diagnosis. It turned out to be electrolytic caps leaking onto the board and causing etching. You might get some help there. I found them competent, if not a little slow and difficult to deal with (slow service).
http://www.shop.solarcowboyzoutlet.com/Inverter-Repair-Service-Inverter-Repair-Service.htm Jason Szumlanski On Wed, Oct 21, 2015 at 9:58 AM, Dave Tedeyan <dtede...@taitem.com> wrote: > Hi All, > > Is anyone familiar with the wiring in the old Sunny Boy U inverters? We > have got a call from someone who has one where the temperature sensor has > gone bad, and it is always in derating mode. It derates so much that it can > only produce about .1W, even if it is cool out. > > The inverter is located inside a barn, and has been cleaned. The inverter > is also past warranty. > > Anyone have any wiring diagrams for this kind of inverter? Or any > suggestions as to how to bypass the temperature sensor, or change the > programming so that it does not derate anymore? Anything would be useful, > as the alternative is to just get a whole new inverter. > > Cheers, > Dave > > *--* > > > *Dave Tedeyan* > *Project Engineer* > > *Taitem Engineering, PC* > 109 S. Albany Street, Ithaca, NY 14850 > Voice: (607) 277-1118 x121 > www.taitem.com > > _______________________________________________ > 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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