Question What is AVR and n APC Back UPS?

WrongRookie

Reputable
Oct 23, 2020
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Whenever my ups runs at late night, it shows AVR and the fan keeps running during this time until it turns off. It doesn't happen before this time.

So what is it and why does it require the fan inside to run and is it considered normal or something under defect?
 

kanewolf

Titan
Moderator
Whenever my ups runs at late night, it shows AVR and the fan keeps running during this time until it turns off. It doesn't happen before this time.

So what is it and why does it require the fan inside to run and is it considered normal or something under defect?
"AVR" = automatic voltage regulation. Your mains voltage is probably sagging (dropping lower more than 10%).