Question about Powerware 9355 UPS System
I am working with a number of Powerware 9355 UPS systems. One of the systems gives an ''error message'' that ''no battery is installed'' The system operates correctly otherwise. The DC battery breaker was cycled several times and finally we tested the voltage output of the six battery pack and found that each pack had discharged to a voltage (for the entire pack) of about 130 volts instead of the normal 230 volts. The battery packs are relatively new and have not been cycled very many times.
Questions: Is there any way I can get the Powerware 9355 to recognize the battery and have it begin to recharge the battery?
Can I remove the battery pack and recharge it external to the Powerware 9355 and then reinstall the battery pack? Or, are the battery packs dead?
Any other suggestions on getting the Powerware 9355 up and running.
When I entered the battery test mode on the Powerware 9355, I was unable to start the test. Is there a secret to starting the battery test?
Many thanks in advance.
If you battery packs are all at 130volts DC, then all of the packs will have become dead, and the batteries are not recoverable. Your battery DC bus voltage on a Powerware 9355 20 to 40kVA rated UPS is nominal 432 volts DC - 36 batteries in series in each string at 12 volts DC per battery. If batteries go below 10.5 volts DC each, or 378 volts DC bus voltage, no amount of charging will recover these batteries. You should not be recycling the DC battery breaker, unless you felt the battery breaker was faulty. The UPS would have given you an alarm message of either battery breaker Off, Charger Failure, or Low DC Bus Voltage long before the these batteries failed.
The battery test will not proceed if the batteries are dead.
Posted on Feb 11, 2011
The Batts can be charged externally, then refitted, usually I extend the DC cables so I can work with the batt outside the unit. This is ONLY to be done if you understand the risk and what may happen if you get it wrong.
Batts are always live and can cause fire/explosion/severe burns if shorted!
IF YOU ARE NOT SURE THEN GET SOME EXPERIENCED HELP!
OK so the UPS will not normally recognise a very low batt pack, that is the reason you can not start the test, this test will back of the rectifier so the batt pack takes the load for a short period.
If the batt pack is out of range then this will make the load go off, so the UPS is designed not to allow the test,unless the batt is at the right level.
If you can get the batt pack up close to normal then the unit will recharge it to full.,Wait until it is fully charged before testing.
If this is sucessful the cyle the batt a few times allowing it to reach around low batt warning before recharging. This will assist the batt in recovery. During this process if possible monitor with a test intrument(fluke 123 or 43B will do) the batt pack discharge curve , once the batt pack has dropped to its charge level from float, it should be a smooth decay.
depending on the state of the batts you may be ok, if there are weak ones in the string then you may have to replace all of them depending on the age of the batt pack.
MAKE SURE YOU ARE VERY CAREFUL WITH BATTERIES, THEY ARE VERY DANGEROUS, AND ALWAYS LIVE!
Check you manual for safety procedures, BEFORE working on Batteries.
hope this helps
thanks for using Fixya
Posted on Jul 13, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Feb 26, 2015 | Eaton Powerware 9355 20-30 kVA UPS...
Oct 12, 2014 | Eaton Powerware 9355 UPS System
Aug 27, 2014 | Eaton Powerware 9355 20-30 kVA UPS...
Aug 01, 2014 | Eaton Powerware 9355 UPS System
Apr 11, 2014 | Computers & Internet
Feb 18, 2013 | Eaton Powerware 9355 UPS System
May 11, 2011 | Eaton Powerware 9155 - Power Array - 10.8...
Nov 27, 2010 | Powerware Plus 36 UPS System
Nov 15, 2010 | Powerware 9335 UPS System
Dec 13, 2017 | Team Computers & Internet
572 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: