Squeaking

UPS battery cabinet squeaking

The usual causes for this kind of sound are: magnetoscriction, aka "coil whine" which occurs as variable magnetic fields cause inductor/transformer core material to shrink and expand slightly. and piezoelectric effect, which causes Class-2 ceramic capacitors to also expand and. . My UPS decided to die and squeal while doing it. Here is how I replaced the battery on an APC BE550G and tips on how to plug in all of the those odd shaped AC adapter plugs. Ask the UPS supplier what they. . Performing a reset on the device by following steps to provided by the manufacturer will cause the sound to stop when plugged back into the wall but resume again after a few minutes. I've tried resetting the device, removing and readding the battery. Any suggestions? Sorry, unable to complete the action you requested. Despite letting it to charge for almost a day, it produces a faint squeal still audible from about a meter away. This sound modulates between a lower and. . [PDF Version]