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Chapter 11 Troubleshooting
If the UPS in HE mode, the UPS transfers automatically to Online mode and then the test is
launched. Once the test is complete, the UPS is enabled to transfer back from Online mode to
HE mode.
UPS may fail when installed after longer storage time
Issue
Users, installers, and servicers installing a new Lenovo Uninterrupted Power Supply (UPS) unit
from stock, may find that the UPS will not power on or gives an immediate or near immediate
low battery alarm or error message.
Solution
Replace all batteries of the affected UPS unit. For additional information on the correct UPS
battery replacement procedure see
The batteries for this UPS unit can be hot-swapped.
After replacing the UPS batteries the UPS must be running for at least 48 hours without
protecting any load in order to ensure proper UPS battery functionality.
Note: The EBM will charge to 90% capacity in less than 3 hours. However, the batteries should be
allowed to charge for 48 hours after installation or long-term storage.
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.
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
Replacing battery packs
in
Chapter
10.
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