Cisco ASR 1004 - Manual (Page 31)

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Step 5 Remove any power cables from the Cisco ASR 1004 Router.
a. For power supplies with a circuit breaker switch, position the switch to the Off (O) position.
b. For power supplies with a Standby switch, place the Standby switch in the Standby position.
Note After powering off the router, wait a minimum of 30 seconds before powering it on again.
Remove and Replace a Power Supply
This section provides instructions for removing and replacing the AC power supply and the DC power supply in a Cisco
ASR 1004 Router. Before you begin, make certain the chassis is grounded.
Remove and Then Replace an AC Power Supply
To remove a live Cisco ASR 1004 Router AC power supply that is not operating normally (and then replace the AC power supply
within five minutes), follow this procedure:
Step 1 Slip on the ESD-preventative wrist strap that was included in the accessory kit.
Step 2 Before you turn off a power supply, make certain the chassis is grounded.
Step 3 Turn the power supply Standby switch to the Standby position.of the power supply.
Step 4 Unplug the power cable from the AC inlet on the back of the power supply and the power source.
Step 5 Unscrew the power supply captive screws.
Note Four power supplies must be installed in the chassis at all times, with a minimum of two power supplies (one per zone)
connected to the mains in order to power on the system and ensure sufficient cooling. The system fans are inside the
power supply units and must spin for cooling. Because all the system fans can be powered by one power supply, the
second power supply unit does not have to be powered on, but must be connected.
Caution If you remove a power supply from a system that has four power supplies that are connected and powered on, the
system can run only for a maximum of five minutes before shutting down. However, because the fans and power
elements are independent within the power supply, the replacement power supply does not have to be energized
within five minutes. The only requirement is that the power supply be installed in the chassis in order to energize
the fans and maintain proper system cooling.
Step 6 Grasping the power supply handles, pull the power supply from the chassis.
Step 7 Replace the AC power supply within five minutes or the system will shutdown.
You have removed an AC power supply from the Cisco ASR 1004 Router and now must replace the AC power supply within
five minutes. Follow these steps:
Step 1 Insert another AC power supply in power supply Slot 0 or power supply Slot 1 until it is full seated.
Step 2 Tighten the captive screws. Insert the AC power cable.
Step 3 Plug the power supply cable into the power source.
Step 4 Place the power supply Standby switch in the On (I) position.