Maintaining The T4000 Power System; Maintaining The T4000 Sibs - Juniper T4000 Hardware Manual

T4000 Router Hardware Guide

Maintaining the T4000 Power System

Purpose
Action
Related
Documentation

Maintaining the T4000 SIBs

Purpose
186
For optimum router performance, verify the condition of the power supplies and grounding.
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
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
Cable and Lugs Specifications" on page 341
Lug Specifications" on page
Use the show chassis environment pem
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
receiving source DC power.
T4000 Power System Description on page 43
T4000 Six-Input DC Power Supply LEDs on page 45
Chassis Operational Mode Commands
For optimum router performance, verify the condition of the SIBs.
"Troubleshooting the T4000 Power System"
and "T4000 Chassis Grounding Cable and
335.
command to verify the status of the power
LED on a DC power supply lights when the input is
Copyright © 2013, Juniper Networks, Inc.
"T4000 DC Power