Question about Powerware 9120 UPS System

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I have a powerware 9120 (6kva) and about 1 week i replaced all 20 batteries after the UPS failed. but its displaying battery disconnected when i try to power it. i cant seem to figure the problem. i tried rplacing the charger board but it didnt work. i also tried replacing the main board but it also didnt work. please help me find a solution

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Did your UPS display "Battery disconnected" or did it display "Battery Failure"? If it was "Battery Failure", for some reason the Powerware 9120 will take almost 18 hours after plugging in to power after battery replacement to correct the Battery Failure indication. Charger has to charge up the batteries, followed by an automatic battery test by the UPS. If the indication was "Battery Disconnected", you will need to check the internal fuses to see if they are blown. If the UPS keeps blowing fuses, it will require a board repair.

Posted on Jul 13, 2011

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  • 25 Answers

SOURCE: control board for powerware 9120 6kva ups

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Posted on Jul 11, 2009

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1 Answer

I have a powerware 9120 6000kva . I replaced all 20 batteries, but after 20 hours its displaying charge failure. What can I do?


You can check the battery fuse or the charging fuse. If it's more then that it's going to be a very costly fix.

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I would takes 20 batteries to make one string:

1. GPS- 58EGPS-12-26-I
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BAT DISCONNECTED ERROR DEPLAY


It's probably a failed battery going open circuit or DC voltage is below limit on a cell

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We had a power outage for about 45 minutes a few days ago. Ever since then the Powerware 3110 has been beeping. I turned it off and left it plugged in overnight and when I turned it back on the beeping...


This could be several things, fortunately the device should actually be helping you to diagnose the issue. There are different beeps for different issues. They are as follows:

1 Beep Every 5 Seconds = Power Outage\Loose Plug Connection\Tripped Circuit Breaker\Power Cord Damage or Failure

2 Beeps Every 5 Seconds = Low Battery Alarm

3 Beeps Every 5 Seconds = Battery Needs Charging\Service\Replacement

3 Beeps Every 5 Minutes = The Battery is discharged and battery power is unavailable (If this continues battery replacement may be necessary)

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That should help diagnose the actual issue. If it turns out the battery needs to be replaced they can be found online for around $20. A simple google search for Powerware 3110 Battery should return what you're after. Good luck!

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Toll Free: 1 800 356 5737
E-mail: SinglePhaseTS@eaton.com

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1 Answer

When the machine is power on it show disconnect battery powerware 9120 2kva


There may be a broken batt lead or a failed cell or bloc inside.
try checking with software or


take out batts and test with meter.

if you dont understand how then get a tech to help. batts are dangerous.

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2 Answers

My ups has is faulty i need a circuit diagram to fix it


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.

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The UPS dont go to on batteri


Replace the batteries with new one then power the UPS without load for three hours or more so that the batteries can be charged. Then disconnect or switch off power to the UPS and observe if it will till be on using the batteries. If it will be ON then your problem is solved but if it goes off then your UPS is on BYPASS

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9120Powerware batteries


check the fuses inside the ups.
did the message come right after u instal de batteries or some time after?
if it came some time after the ups could have the charger damaged.
if gave the massage right after u could need to replace the fuse or u have a porwerboard problem
good luck

Jun 20, 2008 | Powerware PowerRite Plus UPS System

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