Installing The Ac Power Supply - Cisco ASR 903 Hardware Installation Manual

Installing the Cisco ASR 903 Router
Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning
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
Note
outage.
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
Warning
installation. Install only in accordance with national and local wiring regulations.
Cisco ASR 903 Aggregation Services Router Hardware Installation Guide
Installing the AC power Supply
113