Questions & Answers for: apc back making noise

...apc es 350 is making a loud squeeling noise. What is wrong with this backup device? My solution was to unplug everything, hit the reset button, and then power the unit back up. The problem I found to ...

...apc making loud noise I bought a new SUA1500 and it worked great. It produces a rather loud buzzing sound all the time. press the reset button on the back of the ups... it could be on the front as ...

...APC bx900r is making a squealing noise with the red light flashing after a few minutes after being turned on. The brochure says this means it is overloaded, but nothing is plugged in to it. the ...

...making a whistling sound or humming sound. It still has power and is powering the devices plugged into the back up system. Is the unit running on battery power? A hum is normal when the inverter is ...

...APC Back-UPS Office 500VA (BF 500U) will not stop making noise even after I unplugged it from outlet. How do I make it stop? Disconnect the battery(s) from inside. The backup batteries are still ...

...APC-Back-UPS-RS-900-BR900-Replacement-Batteries If it IS the overload light that is lit, you simply have too much equipment attached to the UPS, more than the inverter can handle. Try removing some ...

...making a really anoying beep noise. Two possibilities come to mind. 1) The battery has failed and can't be charged fully (usually one cell fails and it won't charge fully). I've diagnosed this by ...

Apc battery backup makes squealing noise, then the power light comes on, why When there is no power coming into the UPS it will indicate so by 'squealing', during this time - the UPS is on battery. ...

...apc ups it started to make a noise and the light starts to flicker, how can i fix this? pls help me thank you..... I don't know what to do so pls help me fix my UPS please thanks.... check battery ...

...APC model BG550G back up. one of our staff dropped the unit and it now makes a continuous ringing and buzzing noise. will only stop if you remove the battery. can this be fixed? no, replaced yes CALL ...