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Cisco ASR 903 Router Hardware Installation Guide
OL-25178-04
Chapter 3 Installing the Cisco ASR 903 Router
Installing the Power Supply
Activating the AC Power Supply
Follow these steps to activate the AC power supply:
Step 1 Plug the power cord into the power supply.
Step 2 Connect the other end of the power cord to an AC-input power source.
Step 3 Verify power supply operation by checking that the power supply LEDs are in the following states:
• INPUT OK LED is green
• OUTPUT FAIL LED is green
Step 4 If the LEDs indicate a power problem, see the Chapter 5, “Troubleshooting”for troubleshooting
information.
Step 5 If you are installing a redundant power supply, repeat these steps for the second power source.
Note If you are installing a redundant AC power supply, ensure that each power supply is connected to a
separate power source in order to prevent power loss in the event of a power failure.
Removing and Replacing the AC Power Supply
This section describes how to remove and replace the AC power supply.
Note 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.
Caution To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after a power
supply has been removed or replaced.
Warning
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 1074
Follow these steps to remove and replace the AC power supply: