Nortel Ethernet Routing Switch 8000 Series Installing And Maintaining

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64 Operating the Ethernet Routing Switch 8000 SeriesIf your 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 shut off within7 seconds. To correct this condition, turn off the power supplies fora short period of time, and then turn on the power supplies againsimultaneously.It is not necessary to remove the bezel to turn the power switch on.Do not operate the 8010co chassis with only one power supply. Seethe figure "DC power supply power switch" (page 64).DC power supply power switch3 Verify that the power output LED for each power supply lights green.4 Verify that the power supply status LEDs and the fan LED on the8691SF or 8692SF CPU modules light green.5 Verify that air is flowing from the cooling fans out through the back ofthe 8010co chassis.The fan tray red fail LED may light briefly while the fans are poweringto operational speed.—End—After you turn on the Ethernet Routing Switch 8000 Series, each moduleautomatically initiates a diagnostic test to verify proper module function [see"Verifying a successful installation" (page 66)].If the power supply LED remains off, or if you cannot feel air flow from the8010co chassis vents, perform the following procedure:Nortel Ethernet Routing Switch 8600Installing and Maintaining the Ethernet Routing Switch 8000 Series ChassisNN46205-303 01.01 Standard4.1 2 January 2007Copyright © 2007, Nortel Networks Nortel Networks Confidential.