My UPS was beeping constantly (faster then the out of AC power beep). Disconnecting the battery - still beeped! Checked on the APC website and the device is discontinued. I took it apart thinking that maybe one of the internal fuses went. Nope. I then searched forums for tips and came up empty. Finally I just unplgged the thing and let it sit on the bench for a week or so. I then cam back an hooked a known good battery to the unit and plugged it. BAM! that fixed it. seems the battery really was dead but it would not recognize a NEW good battery until the unit sat and discharged completely ??? weird. Anyone else have similar or other experience like this ?
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APC ES500C series battery replacement
- Thread starter bithead9
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Here is an update. It all SEEMED well for a couple days. Then suddenly the unit started doing the 3 battery low beep. then within a minute four beeps followed by a continuous beep. I am guessing the charging curcuit is marginal and it eventually failed. Still have to get the DVM out and check the battery voltage. But I am betting its near zero volts.
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