Cisco ASR 903 Hardware Installation Guide

Installation of the equipment must comply with local and national electrical codes. Statement 1074Warning
Follow these steps to remove and replace the DC power supply on the Cisco ASR 903 Router:
Step 1
Verify the circuit breaker connected to the power supply that has to be replaced.
Step 2
Before servicing the power supply, switch off the circuit breaker in your equipment area. As an additional precaution,
tape the circuit-breaker switch in the Off position.
Step 3
Slip on the ESD-preventive wrist strap that was included in the accessory kit.
The power supplies are not fed by both power units. Shutting off the incorrect power supply may cause a traffic
outage.
Note
Step 4
Measure the DC voltage on the failed power supply input, thus ensuring that the correct unit has been powered off.
Step 5
Loosen the captive screws on the DC power supply.
Step 6
Grasping the power supply handle with one hand, pull the power supply out from the chassis while supporting it with
the other hand.
Step 7
Remove the lugs from the PSU.
Step 8
Replace the new DC PSU and connect the DC leads to the power supply as before
Step 9
Turn on the circuit breaker or the reinstall the fuse.
Step 10
Verify the power supply by checking if the front panel LEDs are as below
• ◦
Input OK LED is green
◦
Output FAIL LED is green
Installing the AC power Supply
This product requires short-circuit (over current) protection, to be provided as part of the building
installation. Install only in accordance with national and local wiring regulations.
Warning
Cisco ASR 903 Aggregation Services Router Hardware Installation Guide
113
Installing the Cisco ASR 903 Router
Installing the AC power Supply

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English