The charger in powerware 9 series 9120 6000i ,the fan is of a quality that it fails and the heat sink does not get sufficient cooling ,it runs on 12 volt ,i replaced it with a cpu fan from a mainboard on a pc and it works perfectly now. make sure that the fan is running else the charger might go in protection or can fail due to the transistor on heat sink fails.
I have facing problem of "Bus Unbalance". Now UPS running on bypass mode. Can I reset our UPS without failure the output. We are using Powerware, model PN91206000i
The charger board has failure. Model already obsolete. Propose to buy a new unit
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