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Too sensitive (possibly damaged UPS)?

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

Redi_apc
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Too sensitive (possibly damaged UPS)?

This was originally posted on APC forums on 1/9/2017


Hi,

I have a Back-UPS RS 800 and a few weeks ago it suddenly refused to go online after start-up and kept falling back to battery. Naturally the first thing I did was to replace the batteries since they were approximately 4 years old but now it exhibits the same thing again.

I can turn it on, the battery check starts running, the green light switches off, the orange one comes up and I can hear and see (for testing purposes I use a normal light bulb) how it switches to battery but it will never ever switch back. Everything is set to the lowest possible sensitivity. But when I connect it to my fully functional Back-UPS CS 650 the dang thing works without a glitch.

Any ideas? The only think that comes to my mind is that I remember setting the Hz settings back when I bought it. But that settings is gone from the software? Is that possible? Might that wrong setting cause that?