[Nut-upsuser] APC SmartUPS powercycles when power returns

[Manuel Wolfshant]

On October 11, 2022 5:04:45 PM GMT+03:00, Andrea Venturoli via Nut-upsuser <nut-upsuser at alioth-lists.debian.net> wrote:
>On 10/11/22 15:48, Roger Price wrote:
>
>>> ups.firmware: UPS 08.8 / ID=18
>>> ups.mfr: American Power Conversion
>>> ups.mfr.date: 2014/06/20
>> 
>> How old is the battery?
>
>~2.5 years.
>The above date was probably not updated when it was changed.
>
>Could a faulty battery pack produce this???
Usually, not. The usual behaviour with (old|faulty) battery is sudden drop of battery capacity from 100% to 0 or close to 0 and instant death, probably without offering the protected systems to do a proper shutdown sequence. Many times the battery also pretends to recharge very fast.

>I mean, it keeps the systems up as long as line power stays off, can it then fail when the power returns???
Nope


>
>I've had several such UPSes and never saw this.
>However, if someone has seen this behaviour I'll try changing the batteries.
I've never seen this either. I do not think that batteries are at fault. OTOH I would not be surprised if an 8 yrs old UPS is defective.


wolfy
-- 

>I'd just hate to do this and discover the UPS is faulty, instead.
>
>N.B. The UPS is NOT asking for a battery replacement.
>
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>> It's difficult to say more without knowing exactly where you are in the sequence of events and the timing as listed in 
>
>1. Wall power on
>2. Wall power fails
>3. ...
>Not 4. (batter.low was never reached); goes directly to
>14. Wall power returns.
>XX. Attached computers reboot instantly!!!
>
>
>
>
> bye & Thanks
>	av.
>
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