Juniper Networks M5, M10 manual Replace an AC Power Cord, 103

Replace Power System Components

5.Press the power switch on the faceplate of one power supply to the ON ( ) position. Verify that the blue OUTPUT OK LED eventually lights steadily.

After powering off a power supply, wait at least 60 seconds before turning it back on. After powering on a power supply, wait at least 60 seconds before turning it off.

If the router is completely powered down when you power on the power supply, the Routing Engine boots as the power supply completes its startup sequence. If the Routing Engine finishes booting and you need to power down the router again, first issue the CLI request system halt command. For more information, see “Disconnect AC Power from the Router” on page 102 or “Disconnect DC Power from the Router” on page 109.

After a power supply is powered on, it can take up to 60 seconds for status indicators—such as LEDs on the power supply and show chassis commands—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

6.Press the power switch on the other power supply to the ON ( ) position and observe the LEDs on the power supply faceplate. They should light as described in the previous step.

If the LEDs are not lit in the appropriate pattern after 60 seconds, repeat the procedures in “Install an AC Power Supply” on page 100 and the previous steps in this procedure.

When two power supplies are installed, at least one Routing Engine and one FPC must also be installed for both power supplies to power on. In the absence of this minimum load, only one power supply starts. (The router powers on and operates correctly with one power supply, but without the redundancy benefit of having a second power supply installed.)

7.On the external management device connected to the Routing Engine, monitor the startup process to verify that the system has booted properly.

Replace an AC Power Cord

To replace the power cord for an AC power supply, follow this procedure:

1.Locate a replacement power cord with the type of plug appropriate for your geographical location (see “AC Grounding and Power Cord Specifications” on page 45).

2.Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see “Prevent Electrostatic Discharge Damage” on page 134.

3.Press the power switch on the power supply faceplate to the OFF (O) position.

Replace Hardware Components 103