20 Most Recent Powerware 9120 UPS System - Page 9 Questions & Answers

Hi, a couple of things you can do but may I first suggest you bring it back to the Technical Support people who replaced the battery and voice your issue. The new battery might have to be replaced (don't be surprised) and you may have certain warranty claims that may be void if you try opening the UPS yourself. If for some reason you want to do it yourself, then you have to open the UPS and check the circuitry including the new battery. You need to be familiar with the use of a multitester (VOM), working with HOT circuits and general electronics. You have to start with any fuses, circuit breakers, relay, SCRs, transistors, etc. If you are not that comfortable doing so, guess were back to the first paragraph. Hope this be of some help. Good luck

Sounds like it is not regulating the voltage and current charging the batteries. Consult a service manual to look for a repair method.

Check the manual - https://powerquality.eaton.com/products-services/legacy/9120-info.asp?act=smtc&id=&key=&Quest_user_id=&leadg_Q_QRequired=&site=&menu=&cx=3&x=8&y=6

It either means the ground wire in extension cord is not there or is open. It could also mean that the outlet wasn't wired with a ground back to the panel.

plug it in

fixya has nothing but advice go google and type the details in the search box

can blow diodes in the alternator and ECM

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.

You need special software, which costs money ...