Greetings wrenches, This is my first post. I ran into this with an SB3000 back in June. I called SMA tech support and spoke to Jake, who was familiar with the problem. His explanation was that there was a series of boards that got some excess lacquer sprayed on them at the factory. This lacquer coats the pins, so the jumper doesn't make a good electrical connection. Jake recommended removing the jumper and scratching off the outer layer of the pins with a razor blade before replacing the jumper. I went gently at first and it worked for a while and then failed again the next time I disconnected the system. Then I went after the pins with gusto on all four sides, removing some metal, and the inverter has been working fine since June. I would recommend having your customers keep an eye out for the "GFDI OPEN" disturbance if you've only fiddled with the jumper, since that connection would probably be fairly susceptible to failure, assuming the problem is with the lacquer coating.
As an aside, I found the SMA tech support line to be very friendly, knowledgeable, and expedient. -Hans Hans Frederickson Frederickson Electric Port Townsend, WA www.fredelectric.com _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kelly Keilwitz, Whidbey Sun & Wind Sent: Monday, September 22, 2008 9:37 PM To: RE Wrenches listserve Subject: Re: [RE-wrenches] Getting "GFDI Open" Message When It's Not Hi All, We've seen this on 2 SMA SB's (one a 3000; can't recall the other) this year. In both cases we got it to work by fiddling with the jumper. Another installer recommended that trick. -Kelly Kelly Keilwitz, P.E. Whidbey Sun & Wind, LLC Renewable Energy Systems NABCEP Certified PV Installer 987 Wanamaker Rd, Coupeville, WA 98239 PH & FAX 360-678-7131 [EMAIL PROTECTED] On 9/22/08 4:08 AM, "design" <[EMAIL PROTECTED]> wrote: 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. Jim Grundy NABCEP Certified Solar PV InstallerT Vermont Solar Specialist Plumber PS-279 Elemental Energy, Inc. 1750 Clark Rd E. Montpelier, VT 05651 802-476-3441 (p) 802-476-5680 (f ) 802-272-8933 (c)
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