The old Trace SW series had a similar issue with Rogers-White(?) boiler controls. It had to do with how the sine (pseudo) wave crossed the X axis. It was too long a space and the controllers just sat there definitely on but doing nothing. I was shown this on an oscilloscope and it was very obvious.
---------------------------------------------------------------------------- Dana Orzel Great Solar Works, Inc - NABCEP # 051112-136 E - d...@solarwork.com - Web - solarwork.com O - 970.626.5253 C - 208.721.7003 - No FAX Line "Responsible Technologies for Responsible People since 1988" P Please consider the environment before printing this email. From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan Sindelar Sent: Thursday, February 12, 2015 5:58 PM To: RE-wrenches Subject: Re: [RE-wrenches] older magnum MS Jay, I can't answer your question, but only relate that I had a similar experience. An early Magnum MS4448AE would not reliably start and run a modern hydronic boiler in an off grid home. I had opened a case with Magnum tech support, but the frustrated HVAC contractor pulled the unit and installed a different brand of boiler and the problem disappeared. In my own home my MS4024AE has nothing it won't run, and it's a newer unit. But whether that's coincidental or the result of an inverter firmware or hardware upgrade, I can't say. Maybe Gary Baxter can? Allan Allan Sindelar <mailto:al...@sindelarsolar.com> al...@sindelarsolar.com NABCEP Certified PV Installation Professional NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder (Retired), Positive Energy, Inc. 505 780-2738 cell On 2/12/2015 2:13 PM, jay peltz wrote: HI All, I"ve had someone ask me about the following magnum and I know there are many more experienced folks that maybe can chime in. MS4448 V1-00138 2007 The problem is that for the life of the inverter it hasn't worked well for things like digital/electronic washer/dryers, even glow bar ovens etc. I don't have all the specifics yet and haven't visited the site. With new units I've not seen this. Are there some issues with these older units? And if so, any fixes? thanks jay peltz power _______________________________________________ List sponsored by Redwood Alliance List Address: <mailto:RE-wrenches@lists.re-wrenches.org> RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> 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 > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: <http://www.re-wrenches.org/etiquette.htm> www.re-wrenches.org/etiquette.htm Check out or update participant bios: <http://www.members.re-wrenches.org> www.members.re-wrenches.org
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