Question about APC Conext 900VA (cnb900) UPS System
This is a signal that the battery is dying, and is failing the self-test. According to Conext, the battery replacement alarm goes off for one minute every five hours. You should also see the replace battery light on the front of the unit lit. Changing the battery should solve your problem.
Posted on Mar 25, 2009
That is probley it it is going bad or it has been unpluged from the sorce to charge it.
Posted on Jan 04, 2009
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