I have an old, beige, rack-mountable, 3u APC 2200RM UPS. It's emitting an annoying continuous tone. The instructions only mention a tone when an overload occurs, but the overload warning light is not on. I've already removed extraneous loads (monitor, redundant power supplies), but it still emits the tone. Is this tone/no light state normal and indicative of some other problem? Or, is this a case of malfunction and the unit needs to be replaced?
Thanks for your help.
Thanks for your help.