User Manual

542
Vess R2000 Series Product Manual Promise Technologies
RePlAcIng A cAche BAckuP BAtteRy
The cache backup battery, also called a Battery Backup Unit (BBU) powers the cache to preserve data that has
notbeenwrittenthephysicaldrives.ThebatteryisattachedtothetopoftheCoolingUnitassembly.EachCooling
unithasonebattery.AnamberorredBBULEDindicatesacachebackupbatteryproblem.See“CoolingUnitLED
indicates a problem with the fan” on page 542.
To replace a backup battery, swap out the Cooling Unit with the BBU that needs replacement. Follow the
instructions in “Replacing a Cooling Unit” on page 541.
Important
DO NOT remove a Cooling Unit unless there is a replacement available and
on hand. Removing a single Cooling Unit without replacing it right away will
adverselyaffectairowwithintheenclosureresultingincriticaloverheating
and shutdown of the enclosure.
An amber fan status
LED indicates there is a
problem. This unit might
need to be replaced.
Cooling Unit LED indicates a problem with the fan