Hi Everyone,
I have a UPS which seems to have a component in it that is not stable. I have a 40W light bulb hooked up to it and when I first turn on the ups the light bulb brightness will jump around rapidly (when running on batteries). If I switch to power then relays inside the unit start clicking in and out approx 2 times a second and the brightness of the lightglobe jumps up and down in incremements as the relays click. After the unit warms up the problem completely dissappears. I could just use it but I'm worried if the problem does appear when it is warmed up it might damage the computer or even start a fire. Does anyone know what the likely culprit might be and how I might test for it? I know the basics of electronics and what the basic components do. The model is a Sola 325 1000VA
Thanks in advance for any replies, Michael