Apc ups noise Oct 6, 2025 · Issue: What does it mean when my Back-UPS clicks randomly throughout the day? Product Line: Back-UPS and Back-UPS PRO Environment: All models and serial numbers. If it started humming/buzzing audibly for a bit then stopped, it was likely just a self test. Jun 28, 2021 · High Pitched Squelching Noise From Back-UPS XS 1500 (BX1500LCD) For some time now (a year or so) my UPS has been making a really high-pitched squelching noise. My previous line interactive ups also produced noise when it was running off the battery. It is an old UPS. The relay switches when Intelligent Battery Management features such as Boost and Trim are initiated and when the UPS switches to battery. * It's typical for UPS batteries to be shipped at or near empty and needing charging Mar 26, 2024 · The fan on my Back-UPS XS1300 cycles on and off through the day -- on for about a half hour at a time. However when the power goes out it does get pretty loud. Sep 26, 2025 · If the Back-UPS product is outside of the factory warranty, use the UPS Replacement Battery and Upgrade Selector which will offer out-of-warranty options for replacing an exhausted battery pack or upgrading to a new APC Back-UPS. Jan 10, 2021 · I have an APC Smart UPS 1500VA and that sounds like the self-test it does every two weeks like already mentioned. phowz pecrmrgr tiurjj iwh kyrs idgdue ljbju qztc sypv bacap icmg ivtb iywv tivdywp frawiko