Good day,
I have an issue with a 720w UPS trolley system. It's only a month and a half old but already failing to last even an hour during loadshedding. My mistake was plugging a desktop on it. For 2 weeks it worked perfectly but from yesterday it kept on beeping continously within +/- 40 minutes into loadshedding, and reflecting error 4 fault. I charged it overnight to cover 13 hours charging time recommended but plugging it again did the same thing even when the desktop was not on. What could be the problem as I even switched the fuses with the hope it's maybe them? Please help. Thank you...