<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">I have also seen this GFDI OPEN message on a few SB3000US units. I have managed to get the unit to boot properly by switching it off, pulling the GFDI fuse out, slightly crimping the fuse clips to make them tighter, then putting fuse back in and switching it on. This may have actually had an affect, or it may have simply been the restart that did it. In any case it seems like this may be a more common occurrence than SMA knows. Two units required one restart, one unit took three before it finally booted correctly.<DIV><BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Jim Grundy</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">NABCEP Certified Solar PV Installer™</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px">Vermont Solar Specialist Plumber PS-279</P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Elemental Energy, Inc.</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">1750 Clark Rd</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">E. Montpelier, VT<SPAN class="Apple-converted-space"> </SPAN><SPAN class="Apple-converted-space"> <SPAN class="Apple-converted-space"> </SPAN></SPAN>05651</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">802-476-3441 (p)</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">802-476-5680 (f )</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">802-272-8933 (c)</FONT></P></SPAN></DIV><DIV><BR class="khtml-block-placeholder"></DIV><BR></DIV></BODY></HTML>