Procedure
Step 1
Set the power switch at the rear of the Version 1 AC power tray to the OFF (0) position. For Version 2 and
Version 3 AC power trays, set the power switch at the front of the to the OFF (0) position.
Do not disconnect all power from the router to replace components, including power modules. See
Removing and Replacing Power System Components, on page 232
Caution
Step 2
Power OFF (0) the circuit breakers assigned to the AC power sources you are disconnecting.
To ensure that power remains off while you are performing this procedure, lock-out/tag-out the
circuit breaker switch in the OFF (0) position until you are ready to turn it on.
Caution
Step 3
Loosen the retainer bracket holding the AC power cords to the power tray receptacle.
Step 4
Unplug the AC power cords from the power tray receptacles.
Reconnecting AC Power
Follow these steps to reconnect an individual AC power cord to a power tray:
Procedure
Step 1
Power OFF (0) the circuit breaker assigned to the AC power source you are reconnecting.
Step 2
Plug the AC power cord into the power tray receptacle.
Step 3
Close and tighten the retainer bracket holding the AC power cord to the power tray receptacle.
Step 4
Power on the AC power source circuit breaker.
Do not turn off the switch on the power tray to reconnect AC power cords. An individual AC power
cord can be plugged in while the system is powered from other AC power sources.
Caution
Reconnecting AC Power
If power has been totally disconnected from the router, follow these steps to reconnect AC power to the AC
power tray:
Procedure
Step 1
Verify that the power switch at the rear of the Version 1 AC power tray is set to the OFF (0) position. For
Version 2 and Version 3 AC power trays, verify that the power switch at the front of the power tray set to the
OFF (0) position.
Step 2
Check that the circuit breaker assigned to the AC power source you are connecting is set to OFF (0).
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
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Replacing Cisco ASR 9000 Series Router Components
Reconnecting AC Power