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Back-UPS ES 700 intermittent constant tone

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.


Back-UPS ES 700 intermittent constant tone

This was originally posted on APC forums on 7/2/2015

Hi there

My APC Back-UPS ES 700 intermittently emits a long constant tone - approx 10 sec.

Power light flashes red then reverts to solid green when tone stops.

Happens randomly several times a day, whether computer is on or off.

Never done this before. Had it for two or three years.

Is battery on way out? Never replaced.

No sign of power loss/fluctuation. Have another UPS elsewhere in house.

Welcome any advice. 

thanks in advance