CM 3.1 on s8710's
Global MCC
Do replacement batteries need to have a minimum pre-charge voltage level for the BIU to charge the new battery assembly?
I have installed the new battery assembly because customer needed the large battery cabinet removed to free up floor space (they also have the PN's running off a building UPS/Generator combo). I have done the following and still get fail test 5 with code 8:
*Installed new battery assembly for more than one week with no change.
*BIU is floating at -54 vdc at the test points (verified this was the same on other inservice cab's).
*Replaced BIU with no change.
*Moved battery assembly to other in service cabinet, and problem followed the battery.
*Moved known good battery to trouble cabinet and test 5 passed.
*Voltage of new battery out of box is -1.8 vdc.
*Voltage of known good battery disconnected from its cabinet was -52vdc (verified this on multiple cab's).
*Ordered another battery and found its voltage out of box is -1.8 vdc, installed and failed test 5 waited more than a day test still fails.
My testing/troubleshooting tells me that the battery assembly must be pre-charged to a minimum voltage before the BIU will float, but I can't find documentation to support. Or, there is a trick to making the BIU charge a completely flat battery.
I'm also open to eliminating the assembly/BIU but can't find if that's an option.
What do you all think?
Thanks in advance.
Global MCC
Do replacement batteries need to have a minimum pre-charge voltage level for the BIU to charge the new battery assembly?
I have installed the new battery assembly because customer needed the large battery cabinet removed to free up floor space (they also have the PN's running off a building UPS/Generator combo). I have done the following and still get fail test 5 with code 8:
*Installed new battery assembly for more than one week with no change.
*BIU is floating at -54 vdc at the test points (verified this was the same on other inservice cab's).
*Replaced BIU with no change.
*Moved battery assembly to other in service cabinet, and problem followed the battery.
*Moved known good battery to trouble cabinet and test 5 passed.
*Voltage of new battery out of box is -1.8 vdc.
*Voltage of known good battery disconnected from its cabinet was -52vdc (verified this on multiple cab's).
*Ordered another battery and found its voltage out of box is -1.8 vdc, installed and failed test 5 waited more than a day test still fails.
My testing/troubleshooting tells me that the battery assembly must be pre-charged to a minimum voltage before the BIU will float, but I can't find documentation to support. Or, there is a trick to making the BIU charge a completely flat battery.
I'm also open to eliminating the assembly/BIU but can't find if that's an option.
What do you all think?
Thanks in advance.