20 Most Recent Powerware 9120 UPS System - Page 4 Questions & Answers

710-12102-0X - PCBAS 9120 5-6KVA CNTL-1112NN - £107.67 + delivery + VAT from the Manufacturer - Eaton Power Quality Ltd

Normally DC BUS FAULT is fixed by replacing C14 and C10. C14 is the 100uf/63V and C10 is 2200uf/16V. They are located between the heat dissipator and the logic board near transformer TX1.

did u check the fuse inside the ups?
did the ups gave the error right after u replace the batteries? or some time after.
sometimes gives the message some time after and its because the charger isn´t working properly. the charger is a spare board in the 9120, 5 and 6 KVa.
good luck

did you get what you needed?

I have a unit I'm parting out. Bill - 5086797432

relay not work

you have to check the I/P voltage , the face rotation , THR. of rectifire , IGBT ,driver of the IGBT

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 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.

its busted by the sounds of it so unless you add more detail thats all I will give as an answer