Related
Documentation
T4000 Connector Interface Panel (CIP) Description on page 27
•
•
T4000 Craft Interface Description on page 23
Troubleshooting the T4000 Cooling System
Problem
The following alarms, LEDs, and other conditions indicate a problem with the cooling
system:
•
A red alarm indicates that the temperature of the router exceeds the maximum
(“temperature hot”) threshold.
•
Automatic shutdown of the power supplies can be caused by the temperature of the
router exceeding the maximum (“temperature hot”) threshold. The control board turns
off the power supplies because the router temperature exceeds the acceptable
maximum.
•
A red alarm indicates that a fan failed.
•
A yellow alarm indicates that the router temperature exceeds the “temperature warm”
threshold.
•
A yellow alarm indicates that one of the fan trays was removed.
•
One or more fans in a fan tray function at full speed. The control boards constantly
monitor the temperatures detected by sensors on the midplane and router components,
adjusting the speed of the fans as necessary. If one fan fails, the host subsystem adjusts
the speed of the remaining fans to maintain proper cooling.
Table 30: T4000 Cooling System Fan Tray Alarms
Solution
Alarm Condition
CLI Message
LCD Message
Alarm
Type
Replace the fan tray.
A fan has failed.
fan-name
Failure
Fan Failure
Red
Reinstall the fan tray
in the chassis.
A fan tray is missing
or too many fan trays
have failed.
Too many fans
missing or failing
Fans Missing
Replace with an
appropriate fan tray.
For a list of supported
fan trays, see
“T4000
Cooling System
Description” on
page 21
.
A fan tray is
unsupported for the
T4000 router.
<fan-name>
Improper for
Platform
<fan-name> Improper
Replace with an
appropriate fan tray.
An incompatible fan
tray is inserted into
the chassis.
Incompatible rear
fan tray or front fan
tray detected
Reinstall the fan tray
in the chassis.
A fan tray has been
removed.
fan-name
Removed
Fan Removed
Yellow
193
Copyright © 2013, Juniper Networks, Inc.
Chapter 18: Troubleshooting T4000 Router Hardware Components
Содержание T4000 -
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