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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>LOL – the knocking to reset arc faults always drove me nuts! How many times did I miss the knocking window only to turn off, then back on and wait for just that right moment to knock. But not too lightly and certainly not too hard. Can’t believe SMA thought this was a good way to do this.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><img width=331 height=131 style='width:3.4427in;height:1.3593in' id="Picture_x0020_1" src="cid:image001.png@01DA7A12.F088AD20"><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> <b>On Behalf Of </b>William Miller via RE-wrenches<br><b>Sent:</b> Tuesday, March 19, 2024 2:09 PM<br><b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b>Cc:</b> William Miller <william@millersolar.com><br><b>Subject:</b> [RE-wrenches] SMA 22 series inverters, resetting AFCI fault<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>Friends:</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>I learned something yesterday about the SMA 22 series string inverters: I have a client that experienced an arc-fault shutdown. I tried to reset the error condition by following the procedure in the manual. This involves shutting down the inverter and then knocking on the front panel during re-start when directed. I had no luck.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>Techs support said to knock harder. I knocked so hard my knuckle started bleeding. Tech support said: sometimes these inverters get “stuck” and you need to connect with a speedwire device to unstick them. </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>The speedwire is no longer made but I did find one to purchase for a little over $200. I have the same inverter at home so I practiced hooking the device up to my inverter. I had some problems so I called tech support and spoke to a different person. He said I don’t need a speedwire, I just need to knock harder with the back of a screwdriver in the correct spot.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>I went the location with the failure and using a screwdriver tapping vigorously just to the left of the display I got the unit to reset.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>I am keeping the speedwire because I am paranoid I might need one in the future and not be able to procure one. If anyone wants to borrow the thing, let me know.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>William</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'>Miller Solar</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'>17395 Oak Road, Atascadero, CA 93422</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'>805-438-5600</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'><a href="http://www.millersolar.com/">www.millersolar.com</a></span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif'>CA Lic. 773985</span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p></div></body></html>