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Chapter 10 UPS maintenance
Lenovo 8 kVA and 11 kVA Extended Battery Module
CAUTION:
Battery pack replacement procedure
Attention!
When the UPS unit issues either battery fault message or the reminder to replace the batteries after
four years is displayed then all battery packs must be replaced!
The UPS unit can not determine which battery is defective.
Mixing old and new batteries in any UPS installation will lead to a thermal destruction of the UPS
unit!
Once batteries are replaced, it is important to run a charge cycle of 48 hours to ensure the capacity
and runtime is synchronized. Two battery tests are performed during that portion of the ABM cycle,
three measurements are performed and will ensure there are no bad cells in the battery string.
The battery algorithm needs a known starting point for ABM functionality, battery test and the
estimated runtime to be reasonable. Charging the batteries for 48 hours ensures those functions are
set correctly and advised for any start-up to ensure the batteries are good and the timers are setup
correctly.
Run a manual battery test and then let the batteries charge for 48 hours. See
functions
battery test.
During the 48 hour charge cycle the UPS is not to protect any load!
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
The weight of this part or unit is more than 55 kg
(121.2 lb). It takes specially trained persons, a lifting
device, or both to safely lift this part or unit. (C011)
under
Control
/
Start battery test
for additional information on how to manually start a
Chapter 3
/
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