Smart UPS RT 8000 XL discharges batteries on Self-Test

[Anonymous user]

Good afternoon all

I have in my facilities the above UPS and got indication to replace batteries a few weeks ago..

Replaced batteries (all four of them) with original RBC44 (2 of them) and put it into production

Now after leaving the unit charge batteries for 2 days now, i get indication that batteries are 100% charged, 217VDC on them, but as soon as I perform a self test, i get events that batteries are too low to support the load (when actually there is NO LOAD) and charge percentile drops to 14% and increments there on to 100% in a few hours. Repeating the self-test again produces the same result in a infinite loop

I have no events regarding any failure whatsowever

Am I missing something, or do I have a problem in my unit?


Thanks for any help regarding this issue

[BillP]

how much battery runtime does the UPS report? i am assuming it is because it is within two minutes of the low battery signaling time which defaults to two minutes.

if these are geniune replacement batteries, i suspect you just need a runtime calibration to tell the UPS you have new batteries. you should generally do this with a load on the UPS of at least 30% and make sure it does not fluctuate. the management card installed can execute the calibration for you or you can do it manually if you'd like and remove power from the UPS and let it turn off completely and charge back up. if you do the calibration via the management card, it will discharge the UPS to about 10-15% and then charge back up incase you don't want the attached load to shutdown hard.

[Anonymous user · Accepted solution]

Thanks for all your input i picKed a winna

However that did not solve my problema. Neither calibration nor discharging with a 30% load until exhaustion

Had to remove the 9631 card and entered via serial port into SM where I could reset the UPS to state 8C

After comproving correct functioning, inserted network card again and everything is working now

Thanks for your help

[apatel777]

I have the same challenge after battery replacement, shows discharged battery warning, 0 mins runtime and not calibrating.

With regards to this solution - Had to remove the 9631 card and entered via serial port into SM where I could reset the UPS to state 8C

Can you advise what you mean by state 8C, is this a simple process, does it require everything to be unplugged from UPS?

Thanks