APC ES 550 Constant Alarm Sound

Anonymous user · ‎2021-06-29

Hello All,

I came home this afternoon and my backup was emitting a high pitched constant sound and my computer was off. There are 4 outlets in the "battery backup" section and they don't appear to be working. The 4 outlets in the "surge suppression" section appear to be fine. I was browsing some of the threads and am I correct in assuming that I need a replacement battery? I've had the unit for almost 4 years with no problems whatsoever. Will the replacement battery resolve this? Thank you so much for your help!

BillP · ‎2021-06-29

what was the LED doing? the user's guide will have status indicators but it usually relies on what you see on the unit with no tone. without checking, i believe a constant tone with no LED is actually an overload shutdown. we can verify in the manual though. first i just wanted to check what the exact "ES 550" model you have is - it will be on the white sticker of the UPS. BE550R or BE550G? I think they both are the same indicators though, no matter which unit, but I better just ask.

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BillP · ‎2021-06-29

what was the LED doing? the user's guide will have status indicators but it usually relies on what you see on the unit with no tone. without checking, i believe a constant tone with no LED is actually an overload shutdown. we can verify in the manual though. first i just wanted to check what the exact "ES 550" model you have is - it will be on the white sticker of the UPS. BE550R or BE550G? I think they both are the same indicators though, no matter which unit, but I better just ask.