Table 84: T4000 Temperature Alarms - Juniper T4000 Hardware Manual

T4000 Core Router Hardware Guide

Table 84: T4000 Temperature Alarms

Alarm Craft Interface LCD
Type Message
Red Temperature Hot
Sensor Failure
Yellow
Temperature Warm
Solution
352
CLI Message
Temperature Hot
Temperature sensor
failure
Temperature Warm
To troubleshoot the cooling system:
Check the red and yellow alarm LEDs on the craft interface.
1.
Find the source of the problem by looking at the craft interface display. The number
2.
of alarm conditions, as well as the source of each alarm, appears on the screen. If the
craft interface display lists only one fan failure and the other fans are functioning
normally, the fan is probably faulty and you need to replace the fan tray.
Use the
3. show chassis alarms
alarm condition:
user@host> show chassis alarms
For information about the alarms, see
Use the show chassis fan
4.
the output display indicates that each of the fans are
user@host> show chassis fan
Item
Top Left Front fan
Alarm Condition Solution
The chassis Place your hand near the exhaust vents
temperature at the rear of the chassis to determine
exceeded the whether the fans are pushing air out of
recommend hot the chassis.
temperature
Verify that the room temperature is
threshold. If this
within acceptable limits.
condition persists,
Verify that there is sufficient air flow.
the router shuts
Verify that the cooling system in the
down.
chassis is operating properly.
A temperature sensor Contact JTAC.
failed.
The chassis Place your hand near the exhaust vents
temperature at the rear of the chassis to determine
exceeded the whether the fans are pushing air out of
recommended warm the chassis.
temperature
Verify that the room temperature is
threshold.
within acceptable limits.
Verify that there is sufficient air flow.
Verify that the cooling system in the
chassis is operating properly.
command to get information about the source of an
Table 83 on page 351
command to verify that the status of each fan is
Status RPM
OK 3420
and Table 84 on page
OK and that
Spinning at normal speed
Measurement
Spinning at normal speed
Copyright © 2018, Juniper Networks, Inc.
352.
.