Powerware 5125 fan constantly running - Powerware PW 5125 5000 RM (103003611-5591) UPS System

check if battery is connected or not

UPS require constant power. Meaning they provide minimal (time)
power to save work and shut shut down properly. The generator would have to run 24/7.

I urge you to contact Eaton: Toll Free: 1 800 356 5737
E-mail: [email protected] They bought Powerware about 6 years ago and have a full team of service personnel familiar with the 5125.

The LEDs are actually indicating the amount of load on the UPS and only indicate battery charge level when running on battery power. You can email [email protected] if you'd like to follow up.

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.

No its not.
Both fans should run. You should consider replacing the fan.

Have you checked the user manual? http://powerquality.eaton.com/Products-services/Backup-Power-UPS/5125.aspx?cx=3 Could be an alarm letting you know that the battery is dead.

There may be a reason. Too much current draw.
I would recommend to get a better brand UPS.

plug it in

in the 9120 series the fan is allways working, but as 2 speeds. the higher goes of when the load goes around 80% or the temperature inside is higher. just make sure the the fans are clean, and check the ups temperature.
but is normal.
good luck