Juniper T640 Hardware Guide

Table 95: T640 Cooling System Alarm Messages (continued)
SolutionAlarm ConditionCLI MessageLCD MessageAlarm TypeComponent
• Verify that the
room
temperature is
within
acceptable
limits.
• Verify that
there is
sufficient air
flow.
• Verify that the
cooling system
in the chassis is
operating
properly.
The chassis
temperature
exceeded the hot
temperature
threshold. If this
condition persists,
the router shuts
down.
Temperature HotTemperature HotRedTemperature
sensors
Contact JTAC.A temperature
sensor failed.
Temperature sensor
failure
Sensor Failure
• Verify that the
room
temperature is
within
acceptable
limits.
• Verify that
there is
sufficient air
flow.
• Verify that the
cooling system
in the chassis is
operating
properly.
The chassis
temperature
exceeded the warm
temperature
threshold.
Temperature WarmTemperatureWarmYellow
Solution To troubleshoot the cooling system:
1. Place your hand near the exhaust vents at the rear of the chassis to determine whether
the fans are pushing air out of the chassis.
2. If the red alarm LED on the craft interface lights, look at the craft interface display to
find the source of the problem. The number of alarm conditions, as well as the source
of each alarm, appears on the screen.
471Copyright © 2017, Juniper Networks, Inc.
Chapter 33: Troubleshooting Components

Juniper T640 Specifications

General

Brand	Juniper
Model	T640
Category	Network Router
Language	English