Question about Powerware 9120 UPS System

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No Power I have a powerware 9120, it can be turn on if there was batteries, but it could get drained, the batteries were not charging, on charger card i could get dc voltage from bridge rectifier to transformer(08-43000-00) input, is it possible that ihave a burnt tranformer on charger card?

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You should measure AC voltage from the output of the transformer to the bridge rectifier, and after the rectifier you should see a DC voltage (you may also read some "ripple" AC voltage on the DC side as well). Check across each battery to see how many volts DC they are receiving (as they will all be in series connection ie one after the other). Batteries are the usual problem with faulty UPS's. You may have a problem battery or multiple problem batteries and they may need replacing.

Posted on May 06, 2008

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