Gennadiy Poryev via Nut-upsuser
writes:
> I took an external voltmeter and made sure that actual input voltage
> is around 223 V and is not changing. However, each successive run of
> upsc indicated drastically different "input.voltage", arbitrarily
> jumping from 160 V to 280 V. Besides this,
Good advice from Jim K,
I wonder if Gennadiy's input power plugs & sockets or cable or trip fuse
have got loose, dirty, high resistance ?
Doesnt seem a battery problem, but always worth checking:
One can measure a battery's internal resistance by disconnecting, &
connecting across a car headlamp
Is the battery old? PbAc ones usually last for 2-3 years and then degrade.
Should be a field-replaceable part.
Some 20 years ago I had an APC BackUPS become a glorified power strip every
few years, so when the wall power disappeared - load went down immediately.
It was also beeping about battery
Hi,
I am sorry for possible offtopic as this question is not quite
NUT-related but I cannot imagine any other place with people of such
deep and intimate knowledge of UPS behavior.
One day all of a sudden my APC Back-UPS RS 1000 refused to go online
(green led) even though mains was
