Maintaining the T4000 Power System
Purpose
For optimum router performance, verify the condition of the power supplies and grounding.
Action
On a regular basis:
•
Check the red and yellow alarm LEDs and the LCD on the craft interface. Power supply
failure or removal triggers an alarm that causes one or both of the LEDs to light and
an error message to appear on the LCD. You can display the associated error messages
by issuing the following CLI command:
user@host>
show chassis alarms
For a list of possible alarm messages, see
“Troubleshooting the T4000 Power System”
on page 204
.
•
Make sure that the DC power cables are arranged so that they do not obstruct access
to other router components.
•
The power supplies require an unobstructed airflow at both the front and rear of the
chassis. Periodically check the site to ensure that both the air intake at the bottom
front of the chassis and the exhaust from the power supply faceplates are unobstructed.
•
Periodically inspect the site to ensure that the grounding and power cables connected
to the router are securely in place and that no moisture is accumulating near the router.
To review grounding and site wiring requirements for the router, see
“T4000 DC Power
Cable and Lugs Specifications” on page 341
and
“T4000 Chassis Grounding Cable and
Lug Specifications” on page 335
.
•
Use the
show chassis environment pem
command to verify the status of the power
supplies.
•
Routinely check the status LEDs on the power supply faceplates to verify that the
power supplies are functioning normally. During normal operation:
•
The blue
DC OK
LEDs light to indicate that the power supplies are functioning
normally.
•
Each green
INPUT PRESENT
LED on a DC power supply lights when the input is
receiving source DC power.
Related
Documentation
T4000 Power System Description on page 43
•
•
T4000 Six-Input DC Power Supply LEDs on page 45
•
Chassis Operational Mode Commands
Maintaining the T4000 SIBs
Purpose
For optimum router performance, verify the condition of the SIBs.
Copyright © 2013, Juniper Networks, Inc.
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