I have APC Black UPS 1.1 KVA. Instead of helping me it is irritating me! Often when the power failure occurs it starts making continuous sounds-clicking sound. With the click sound I can also see an Amber colored light is blinking with it. About the Green light it is steady. Also I would like to mentioned that I have an inverter installed in my home so when there is a power cut the UPS runs on inverter. Is this sound harmful for UPS? And Is this sound because of the Inverter? Please post your views.
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