Question about Powerware 9120 UPS System
Posted by Anonymous on
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Posted on Jan 02, 2017
there is a 100uf/63v capacitor near the IRF630 fet. You need to replace this in order to fix this error. Along there is also a 2200uf/16v capacitor. It is a good idea to change the both at the same time.
Posted on Feb 05, 2008
SOURCE: 9120 Battery Failure
sounds like inverter is unhappy(causing the input fuse to blow. maybe, just maybe, this Powerware 9120 has given up the ghost? The inverter can short for a variety of reasons. Try to take out the battery completely, and run it as just a power conditioner. If that works, then you have an unhappy inverter in there.
Posted on Feb 06, 2008
SOURCE: Powerware 9120. 1500i UPS
You can download the manual and other literature at
The contacts for support in India are found at
They offer a battery monitoring software package, at
You can email support at http://www.powerware.com/pp/Check.asp?key=code1
Posted on Feb 23, 2008
1st, the 9120 is a 700, 1000, 1500, 2000, 3000, 5000 or 6000 Va
if it is a 6000 Va that voltage sounds ok, and the ups as no problem, each battery will be around 12,75 Volts, it will be higher and the charging circle ends.
Posted on Jul 01, 2008
I had a DC bus fault error displayed.
So I unplugged battery, then turned on UPS. It said Batt disconnected of course.
So when I plugged in the batt while the UPS was on, and held the power button for a few sec, the UPS displayed Batt testing.
After a few moments it was back online and had no faults!
Worth a shot.
Posted on Dec 09, 2010
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