Why is my UPS emitting a single beep every few mins?
... have observed a single beep being randomly ... ... to the On Battery State (powering ... load from internal batteries ) momentarily and ... ... anomoly and has begun to power the ... from it's internal batteries . If a customer observes their UPS switching to the On Battery State frequently, an adjustment to the UPS thresholds for transfer may be required. ... Note: In one customer's case, we had observed the UPS emitting a single beep, once every 5 mins exactly. Upon removing the internal battery and reconnecting it, the beeping stopped.