Powerware 9120 700i. 2 internal 12V batteries. Configuration correct. Display shows "UPS off." Holding in the POWER button has no effect. Battery charging voltage is 28.1V. Fan runs when plugged in to wall. No AC output. A UPS manual -- minimally a motherboard schematic -- is required. Assistance would be greatly appreciated.

A Powerware 9120 2000 is an uninterruptible power supply (UPS) device that provides power backup to connected devices in case of power outages or other power issues. If the UPS is shutting down at 50% charge and showing low power alarm, there could be several possible causes:

1. The battery is failing: The UPS is designed to shut down when the battery charge reaches a certain level to prevent damage to the battery. If the battery is failing, it may not be holding a charge and may need to be replaced.
2. The battery is not compatible: Make sure that the battery you are using is compatible with the Powerware 9120 2000 UPS. Using an incompatible battery can cause the UPS to shut down or display error messages.
3. The battery cable is loose: Check the battery cable connections to ensure that they are tight and secure. A loose battery cable can cause the UPS to shut down or display error messages.
4. The UPS is overheating: Check the UPS for any signs of overheating, such as a hot feeling on the top of the unit or a burning smell. An overheating UPS can cause the UPS to shut down or display error messages.
5. The UPS firmware is outdated or corrupted: Check to ensure that the UPS firmware is up to date and not corrupted. Outdated or corrupted firmware can cause the UPS to shut down or display error messages.

If none of these solutions solve the problem, it's recommended to contact the manufacturer or a professional technician for further assistance. They will have the knowledge and expertise to troubleshoot and diagnose the issue with your Powerware 9120 2000 UPS.

Check your DC bus fuse. I have a manual if you need one. Email me at [email protected]

bypass is not available because your input is going in one phase rotation and the bypass is going another. Both input and bypass needs to be a clockwise rotation. A cheap phase rotation meter will fix this. Call me at Gruber Power Services for free tech. support 800-658-5883 x256 ask for Eric

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.

You are correct the Positive (+) is the fuse and the other two (orange in my unit) wires both go to the negative (-). Also your battery should be at least 12V 75AH dry cell with a holding voltage of 14V when charged, a standard battery will not work, the unit will boil it dry. This will give a 5 min run time at 75% load (115V 9A continuous).

I changed the units configuration to use a 12V 750AH wet cell by changing its holding voltage to 13V, adjustable on the charging board (the outer most board when the cover is off that is). By doing this the battery costs about $75 not $140 and I get a run time of 4 hours 30 min. at 75% load. My entire office is floating on this unit. Also this unit will require a house current voltage of 105V-125V on a 15A breaker. Yes house current varies all the time by +-10 volts. and unit will use about 10A when running at 75% and charging. The normal output at full load for this unit: 115V 11A. continuous, ( the computers in my office pull 7A to 9A when they are in use, idling at 4A when not in use. So when the power fails I just keep working.

Another thing to note with the new configuration for a wet cell battery, monitoring software will initially show a low run time of 3 to 5 min., but after the unit runs for about a minute on battery the software will adjust to the real run time. So set low battery shutdown for about 2min and the software will work fine.

Ok a little background about the 1.4KVA Battery Backup from Best Power Tech. When I purchased this unit some time ago, it carried a double lifetime warranty good up to $250,000. Not bad for a $2,000 unit. What that meant was not only would the equipment protected by the unit survive a hit, but the unit will also. So far this unit has handled 17 blackouts, over 40,000 line spikes (Voltage greater than 125) and over 3,000 brownouts (Voltage less than 105) and maintained a constant 115 Volt output. (Sub note here the unit beeps while a brownout is in progress, because the battery is being used to help maintain Voltage.) Also this is the same model used at the Kitt Peak Observatory in Arizona. I was encouraged to call and talk to them about the unit, very impressive track record!

Ray
No Budget Productions

Here is the documentation page: http://www.zoomerang.com/Survey/WEB22BKRKCECDW/
You can also contact Eaton. They purchased Powerware about 6 years ago. They retained the Best Power/Powerware service network and technicians:
Toll Free: 1 800 843 9433
International: +1 919 871 1800
E-mail: [email protected]

Hi, here is the documentation page for the 9120 where you can find the manual: http://powerquality.eaton.com/Products-services/legacy/9120-info.asp You can also contact customer support 800 356 5737 or [email protected]. You may recognize the product as the Powerware 9120 but Powerware was bought by Eaton a few years ago. The customer support team is most ex Powerware and are familiar with the 9120.

I've had this same issue what it boils down to is that the Power IN is not being distributed properly across the Power Outlets.

Step 1. unplug everything from the unit and power the ups down. If the alarm clears itself the UPS is mostly likely fine. if it doesn't not clear send it in for repair

Step 2. If step 1 cleared the alarm try distributing the decives across the outlets differently.

There are two inverters so two output if everything is plugged into one side (ie a power bar with 10 things plugged into it) and nothing on the other side this could cause the alarm.

hope this helps

You're getting a power surge through ur outlet. Where it is plug in