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54 posts

Master Geek

#133989 11-Nov-2013 11:03
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I have a Dynamix 1800A UPS looking after a home machine. A sticker on the side reads :

That bit about "repeat the process" - I'm assuming that's meant to be read "repeat the process after having fully drained the UPS battery" ? It just seems a bit pointless otherwise as surely the battery is being topped up with charge as long as it's connected to the mains ?

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Uber Geek


  #930611 11-Nov-2013 11:24
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haha, yeah so you're supposed to disconnect all the UPS load twice in the first 5 months of operation?  Like that's going to happen.

The battery should indeed remain topped off.  I suggest you ignore the label.  UPS batteries usually need replacing every 3-4 years regardless.

edit: assuming they're lead acid batteries, no sense in draining them, they prefer to remain topped off.

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  #930650 11-Nov-2013 12:23
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I've never seen this on any other brand of UPS, though we stick to the 'better' brands like APC.

Just a heads-up re lesser-known UPS devices like the Dynamix ones.  In my experience they are absolutely shocking at reporting a failing battery.  In earlier times when visiting a new site I would run a self-test on the server's UPS.  With the first three of the lesser-known-brand UPS devices I came across and did this with the server would lose power within the 10-30 second self test period.

As a consequence I now schedule this during a brief shutdown period, put the server into a pre-boot state go into BIOS for example) so it is consuming nearly full power and then kills the mains power to give it a real-world test without risking data corruption.

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Ultimate Geek

  #930682 11-Nov-2013 13:45
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My Dynamix had another sticker that required the user to write down when they ran down their UPS at x monthly intervals...

It eventually sacrificed itself in a power surge: saved the computers but fried itself. When I move to the states I'll get a new UPS (they're much more affordable there), but it'll be an APC.

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