Question about APC Conext 900VA (cnb900) UPS System

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Erratic beeping unit started making erratic beeping that runs approx. 1 minute and then quits, it does this at least 3 times a day. no apparent reason(spikes, brown outs etc.) Could this be that the battery is going bad ? it is 7 years old now and started doing this about a month now.

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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

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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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On ours we had to turn off the unit unplug the battery wait 5mins

press the on key and hold for 20secs

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plug in to mains

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Hope this helps
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