50 InstallationProcedure stepsStep Action1 Verify the AC power cords are connected to AC power outlets.2 Turn each AC power supply switch to the on positionsimultaneously. Do not operate the 8010co chassis with only onepower supply.ATTENTIONIf the chassis contains two or three power supplies, turn on thepower supplies simultaneously. If you wait longer to turn on thesecond power supply, one of the power supplies can turn off within 7seconds. To correct this condition, turn off the power supplies for ashort period of time and then simultaneously turn them on.3 Verify that the power LED on each power supply turns green.4 Verify that the power supply status LEDs and the fan LED on the8691SF/CPU or 8692SF/CPU modules turn green.5 Verify that air flows from the cooling fans through the chassisvents.ATTENTIONThe red fan tray fail LED may light briefly while the fans power tooperational speed.--End--Turning on DC power suppliesStep Action1 Turn the power switch on each DC power supply to the onposition. It is not necessary to remove the bezel to turn theswitch on.ATTENTIONIf the chassis contains two or three power supplies, turn on thepower supplies simultaneously. If you wait longer to turn on thesecond power supply, one of the power supplies can turn off within 7seconds. To correct this condition, turn off the power supplies for ashort period of time and then simultaneously turn them on.2 Verify that the power output LED for each power supply turnsgreen.3 Verify that the power supply status LEDs and the fan LED on the8691SF/CPU or 8692SF/CPU modules turn green.Nortel Ethernet Routing Switch 8600Quick StartNN46205-310 02.01 Standard30 May 2008Copyright © 2008 Nortel Networks.