Hi Jay, It may be cheaper to try to use an interrupt relay to shut off the pump. Tricky though for solar direct like these. As far as I can tell, Grundfos tech support doesn't exist.
On Fri, Feb 25, 2022 at 8:34 AM Bradley Bassett <bbasse...@gmail.com> wrote: > Jay, > > As I remember, that is the classic failure mode. We used to see it now and > then, more often than we liked. It's why I used to recommend always getting > the extended warranty. And, it can be either the CU200 or the pump itself. > It might also be a corroded connection between the two. > Brad > > On Thu, Feb 24, 2022 at 8:12 PM Jay <jay.pe...@gmail.com> wrote: > >> Yes. >> And if that light is on it’s supposed to stop pumping. Even if the float >> was bad or maybe the wires were bad, if the cu200 is seeing a full tank >> signal it’s supposed to shut off the pump. >> And it’s not. >> >> I’ve just never seen this failure mode before. >> >> Jay >> >> >> >> On Feb 24, 2022, at 8:48 PM, Mac Lewis <maclew...@gmail.com> wrote: >> >> >> Hi Jay, >> >> Have you ruled out a problem with the float switch/wiring? >> >> On Thu, Feb 24, 2022 at 5:13 PM jay <jay.pe...@gmail.com> wrote: >> >>> HI All, >>> >>> Has anyone seen this failure mode on a Grundfos CU200. >>> >>> The tank full light is on and it keeps pumping ( green arrows working) >>> >>> I suspect the CU200 just needs to be replaced, but as they are pretty >>> pricy I’d thought I’d ask around first. >>> >>> thanks >>> >>> jay >>> >>> >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> Pay optional member dues here: http://re-wrenches.org >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> There are two list archives for searching. When one doesn't work, try >>> the other: >>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> http://www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> http://www.members.re-wrenches.org >>> >>> >> >> -- >> >> >> >> Mac Lewis >> >> *"Yo solo sé que no sé nada." -Sócrates* >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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