Ответ на "UPS is constantly quick beeping and shutting down"PROBLEM: Furman F1000: Powers up and then goes through initialization and shuts down. Will cycle like that until unplugged from AC. SOLUTION: UNPLUG ONE battery lead, UNPLUG ALL electrical units from the rear, UNPLUG from Wall AC Outlet. HOLD DOWN POWER AND CONTROL BUTTON TOGETHER for 30+ seconds. Release. Plug BATTERY lead only. Turn ON unit. Let unit begin initialization and warning of NO AC Power. Plug AC power back in. Unit now stays on. If it happens again, rinse and repeat! Something’s definitely become recently wrong with these units because I have three of them and they are ALL doing the same thing. The only thing that I can think of is that all of the Air Conditioning units going on and off with potentially bad capacitors of their own may be creating voltage spikes or other ‘unknown AC interference’ that is making the control boards on the Furmans and Panamax UPS systems fail.