We have a Smart-UPS 3000 RM that is 5-6 year old with APC OEM batteries that were installed about 6 months ago. This past Tuesday around 4:30 AM it reported a very short duration, but severe voltage sag, less than 115V on the 208V input circuit. The reported battery capacity which was originally 100% immediately went to nearly zero. The battery capacity then rises linearly for the next 2-3 hours back to 100% as presumably the batteries recharge. The event log does not report a power event that caused the unit to go to battery, but rather a warning that battery power was too low and that if input power was to fail, the load would be dropped. However the load, which is at 16% of the UPS capacity, was not dropped during this event.
I need direction to determine if this is a battery, UPS, or software issue. See attached file for screen shots of information presented above and additional data. This includes the log of battery temperature for the unit in question versus another same model unit from the the same manufacturing time frame which is presenting no issues and had batteries replaced a little under 1.5 years ago. The last page also includes the details for the UPS.
Thanks in advance for your help.
Hi Gwenn -
Woiuld it be possible to get the exact model and serial number of the UPS as well as the complete Event and Data logs? I would be happy to review them and see if we can find a possible cause.
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