APC Back-UPS® XS 900 (BX900R) UPS System Logo
Posted on Sep 19, 2009
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Have brand new APC 900 UPS and when plugged in, both green & yellow indicator lights flash. Non-stop. Left unit plugged in for 18 hours (off) to charge battery as info sheet suggested, but lights still flash. Hesitant to plug it in line with new computer, since it seems to be non-operative. Code for both green / yellow flashing at same time?

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  • nedryandoyle Sep 20, 2009

    In fact, I read the manual before taking the unit from the shipping box. Connected the battery as described in the manual. Later, rechecked the battery connections, both appeared to be fine. Returned unit today, per last tech advice, and was told that the unit was defective based on what it did (and didn't do).

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  • Posted on Sep 19, 2009
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Nope! The internal battery is not plugged-in correctly. Unplug the APC unit and open the access door to the battery (it is not dangerous to do).
Re-seat the two wire clips (red & black) to the battery. The positive post has a red mark on it.
Close it up and charge for a few hours before using.

If the symptoms continue, return unit to store.

Wayne Holden

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  • Posted on Sep 20, 2009
Wayne Holden
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Next time READ the manual, those things aren't shipped ready to run, the battery has to be connected first.

  • Wayne Holden Sep 20, 2009

    Glad to hear that!! So many times people don't even look at the information furnished with what they buy. Hope I didn't "torque your jaw", I only want those that DON'T read first to start.



    Not often are new units defective but you got a good solution from the supplier and hope you have good luck with the unit. Mine come from the junk yard of eBay's used electronics and get external battery packs for long, long, long standby power.

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