Lenovo System x3550 M4 - Page 271

Statement34
CAUTION:
Toreducetheriskofelectricshockorenergyhazards:
•Thisequipmentmustbeinstalledbytrainedservicepersonnelinarestricted-accesslocation,
asdefinedbytheNECandIEC60950-1,FirstEdition,TheStandardforSafetyofInformation
TechnologyEquipment.
•Connecttheequipmenttoaproperlygroundedsafetyextralowvoltage(SELV)source.ASELV
sourceisasecondarycircuitthatisdesignedsothatnormalandsinglefaultconditionsdonot
causethevoltagestoexceedasafelevel(60Vdirectcurrent).
•Incorporateareadilyavailableapprovedandrateddisconnectdeviceinthefieldwiring.
•Seethespecificationsintheproductdocumentationfortherequiredcircuit-breakerratingfor
branchcircuitovercurrentprotection.
•Usecopperwireconductorsonly.Seethespecificationsintheproductdocumentationforthe
requiredwiresize.
•Seethespecificationsintheproductdocumentationfortherequiredtorquevaluesforthe
wiring-terminalscrews.
Important:BesuretoreadthemultilingualsafetyinstructionsontheCDthatcomeswiththeserver
beforeyouusetheproduct.
Replacingahot-swapdcpowersupply
Toinstallahot-swapdcpowersupply,completethefollowingsteps.
Attention:OnlytrainedservicepersonnelotherthanLenovoservicetechniciansareauthorizedtoinstall
andremovethe-48voltdcpowersupply,andmaketheconnectionstoanddisconnectionsfromthe-48
voltdcpowersource.Lenovoservicetechniciansarenotcertifiedorauthorizedtoinstallorremovethe
-48voltpowercable.Thecustomerisresponsibleforensuringthatonlytrainedservicepersonnelinstallor
removethe-48voltpowercable.
Step1.Readthesafetyinformationthatbeginson“Safety”onpagevand“Installationguidelines”
onpage31.
Step2.Touchthestatic-protectivepackagethatcontainsthehot-swappowersupplytoanyunpainted
metalsurfaceontheserver;then,removethepowersupplyfromthepackageandplaceiton
astatic-protectivesurface.
Step3.Turnoffthecircuitbreakerforthedcpowersourcetowhichthenewpowersupplywillbe
connected.Disconnectthepowercordfromthedcpowersource.
Chapter6.Removingandreplacingcomponents257