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I only talked about Emmerson (Chloride) units.. The timers may well be different on APC units. It's all just a money making gimmick that is extremely annoying for individuals and small business users. The UPs has to be totally isolated from any kind of AC or DC support, so mains and batteries...
HI, These UPS units have a simple count down clock on their logic boards. It is a case that even replacing the fans (or batteries if it is a 'battery service message') does not cancel the alarm. Chloride (now Emmerson) have the ability to cancel the alarm with software, of course this is at a...
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