Lenovo System x3550 M4 - Page 34

Figure13.DCpowersupplyLEDs
•EthernetactivityLEDs:WhentheseLEDsarelit,theyindicatethattheserveristransmittingtoor
receivingsignalsfromtheEthernetLANthatisconnectedtotheEthernetport.
•EthernetlinkLEDs:WhentheseLEDsarelit,theyindicatethatthereisanactivelinkconnectiononthe
10BASE-T,100BASE-TX,or1000BASE-TXinterfacefortheEthernetport.
•ACpowerLED:Eachhot-swapacpowersupplyhasanacpowerLED.WhentheacpowerLEDislit,it
indicatesthatsufficientpoweriscomingintothepowersupplythroughthepowercord.Duringtypical
operation,theacpowerLEDislit.ForanyothercombinationofLEDs,see“ACpower-supplyLEDs”on
page129.
•DCpowerLED:Eachhot-swapacpowersupplyhasadcpowerLED.WhenthedcpowerLEDislit,it
indicatesthatthepowersupplyissupplyingadequatedcpowertothesystem.Duringtypicaloperation,
boththeacanddcpowerLEDsarelit.ForanyothercombinationofLEDs,see“ACpower-supply
LEDs”onpage129
.
•INOKpowerLED:Eachhot-swapdcpowersupplyhasanINOKpowerLED.WhentheINOKpower
LEDislit,itindicatesthatsufficientpoweriscomingintothepowersupplythroughthepowercord.
Duringtypicaloperation,boththeINOKandOUTOKpowerLEDsarelit.Foranyothercombinationof
LEDs,see“DCpower-supplyLEDs”onpage130
.
•OUTOKpowerLED:Eachhot-swapdcpowersupplyhasanOUTOKpowerLED.WhentheOUT
OKpowerLEDislit,itindicatesthatthepowersupplyissupplyingadequatedcpowertothesystem.
Duringtypicaloperation,boththeINOKandOUTOKpowerLEDsarelit.Foranyothercombinationof
LEDs,see“DCpower-supplyLEDs”onpage130
.
•Power-supplyerrorLED:Whenthepower-supplyerrorLEDislit,itindicatesthatthepowersupply
hasfailed.
Note:Powersupply1isthedefault/primarypowersupply.Ifpowersupply1fails,youmustreplace
thepowersupplyimmediately.
•Power-onLED:WhenthisLEDislitandnotflashing,itindicatesthattheserveristurnedon.Thestates
ofthepower-onLEDareasfollows:
Off:Powerisnotpresent,orthepowersupplyortheLEDitselfhasfailed.
Flashingrapidly(4timespersecond):Theserveristurnedoffandisnotreadytobeturnedon.The
power-controlbuttonisdisabled.Thiswilllastapproximately5to10seconds.
Flashingslowly(oncepersecond):Theserveristurnedoffandisreadytobeturnedon.Youcan
pressthepower-controlbuttontoturnontheserver.
Lit:Theserveristurnedon.
20Systemx3550M4InstallationandServiceGuide