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</o:shapelayout></xml><![endif]--></head><body lang="EN-US" link="#0563c1" vlink="#954f72"><div><div style="font-family: Calibri,sans-serif; font-size: 11pt;">Have you performed insulation resistance tests on the DC conductors (megger)?<br><br>Sincerely,<br>Glenn Burt<br>Sent from my 'smart' phone so please excuse grammar and typos.</div></div><div dir="ltr"><hr><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">From: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:scot.arey@solarcentex.com">Howard Scot Arey</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Sent: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">\u200e6/\u200e18/\u200e2015 8:30</span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">To: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Subject: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">[RE-wrenches] Repetitive and unknown arc-fault codes with this combination...Sunpreme bi-facial and Fronius IG</span><br><br></div><div class="WordSection1"><p class="MsoNormal">I need some help please! I\u2019m quickly losing credibility with two of my customers.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">We have two installations with Sunpreme GxB 350 bi-facial modules and Fronius IG inverters. They keep throwing Error code 240 \u2013 arc fault on the Fronius IG. <o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">We\u2019ve been up and down these installation three times checking connections, replacing connectors, tightening connections, checking for chafed wires. Nothing to cause any visible angst.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">The team here is wondering is perhaps the module itself might be the source of the problem, with some DC arcing inside the J-Box. Any thoughts? We can\u2019t open the j-box on an broken module (be careful handling frameless glass on glass modules <span style="font-family: Wingdings;">J</span>) because there doesn\u2019t appear to anything accessible with modern potted j-boxes.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">As for the conditions when we get these arc fault codes \u2013 typically the peak of a sunny day when they\u2019re making max power.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Each of the installations is a bit different. On the 7KW install with Fronius 7.5, we\u2019ve run the two strings (10 modules each) back to the inverter separately. On the 10.5KW install with the Fronius 10.0, we ran 3 strings of 10 to a combiner box, then one set of conductor back to the Fronius 10.0 where we used the distribution plate to spead the amperage across the six string input channels.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I\u2019m stuck \u2013 any thoughts on other potential arc-fault causes?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal"><b>Howard \u201cScot\u201d Arey<o:p></o:p></b></p><p class="MsoNormal">254-300-1228<o:p></o:p></p><p class="MsoNormal"><a href="mailto:scot.arey@solarcentex.com">scot.arey@solarcentex.com</a><o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal"><img width="209" height="205" id="Picture_x0020_1" alt="logo from letterhead" src="cid:image001.jpg@01D0A998.AFB80420" border="0"><o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p></div><br><div>[The entire original message is not included.]</div></body></html>