[Nut-upsuser] Shutdown after 5 minutes?

Peter Selinger selinger at mathstat.dal.ca
Fri Sep 15 16:31:40 UTC 2006


After what's been said here, and the data that Rob sent, it seems that
the UPSs are faulty; I cannot think of any reason why they should yank
the power after 5 minutes, without any warning sign, and with brand
new batteries. Even stranger that it still does this when the power is
interrupted only briefly. It does not appear to be a driver problem,
as the situation still occurs even when no computer is attached at
all.

On the other hand, did someone say that it does *not* do this under
Windows?  That seems bizarre. Perhaps there is some proactive (and
doubtlessly top-secret) command by which the driver must tell the UPS
not to shut down?

I would advise to stay away from this brand of UPS. 

-- Peter

Udo van den Heuvel wrote:
> 
> Doug Reynolds wrote:
> 
> >> As I wrote to someone else recently on this list: A battery can
> >> appear to have a good charge state (= voltage) even when it's gone
> >> bad & developed a high internal resistance.  That happened to me a
> >> while back when I wasn't even running any software to control UPS.
> >> UPS had been running for years, with charge state good (LEDs). I
> >> pulled power, & it dropped out after maybe 10 secs ! 2 of the 4
> >> batteries had good voltages but high internal resistance
> > I really doubt it is the battery.  I have the same CyberPower unit, new
> > out of the box, and it does the same thing..
> 
> Theoretically it can be an issue so I will swap the two UPSses I have.
> Yet they are fairly new so I would not suspect hardware issues like a
> weak battery.
> 
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