Cisco ASR 903

Removing and Replacing the AC Power Supply
This section describes how to remove and replace the AC power supply.
The Cisco ASR 903 Router power supplies are hot-swappable. If you have installed redundant power
supply modules, you can replace a single power supply without interrupting power to the router.
Note
To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after a power
supply has been removed or replaced.
Caution
When you install the unit, the ground connection must always be made first and disconnected last. Statement
1046
Warning
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Warning
Installation of the equipment must comply with local and national electrical codes. Statement 1074Warning
Follow these steps to remove and replace the AC power supply:
Step 1
Disconnect the power cord from the power source. Do not touch the metal prongs on the power cord when it is still
connected to the power supply.
Step 2
Remove the power cord from the power connection on the power supply. Do not touch the metal prongs embedded in
the power supply.
Step 3
Loosen the captive installation screws.
Step 4
Grasp the AC power supply with one hand, and slide it part of the way out of the chassis. Place your other hand underneath
the power supply, and slide it completely out of the chassis.
Step 5
If the power supply bay is to remain empty, install a blank filler plate (Cisco part number A900-PWR-BLANK) over
the opening, and secure it with the captive installation screws.
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
43
Installing the Cisco ASR 903 Router
Removing and Replacing the AC Power Supply