Juniper T1600 Hardware Manual page 207

Solution
Table 37: T1600 Cooling System Alarms
Alarm
Component Type
Fans Red
Yellow
Temperature Red
sensors
Yellow
Related
Documentation
Copyright © 2010, Juniper Networks, Inc.
To troubleshoot the cooling system:
Place your hand near the exhaust vents at the rear of the chassis to determine whether
1.
the fans are pushing air out of the chassis.
If the red alarm LED on the craft interface lights, find the source of the problem by
2.
looking at the display on the craft interface. The number of alarm conditions, as well
as the source of each alarm, appears on the screen.
If the display on the craft interface lists only one fan failure and the other fans are
3.
functioning normally, the fan is probably faulty and you need to replace the fan tray.
Use the CLI to check the status of the fans. For example, you can issue the following
4.
command to get information about the source of an alarm condition:
user@host> show chassis alarms
For information about the alarms, see Table 37 on page 183.
Craft Interface LCD
Display Message
Fan Failure
Fans Missing
T1600 Rear Fan Tray in
LCC
Fan Removed
Temperature Hot
Sensor Failure
Temperature Warm
T1600 Cooling System Description on page 69
T1600 Chassis Description on page 14
Replacing the T1600 Standard Lower Front Fan Tray on page 201
Replacing the T1600 Standard Upper Front Fan Tray on page 202
Replacing the T1600 Rear Fan Tray on page 204
Replacing the T1600 Rear Air Filter on page 208
Chapter 16: Troubleshooting T1600 Router Hardware Components
CLI Message Alarm Condition
fan-name Failure
Too many fans
missing or failing
For T1600 routers in
T1600 Rear Fan
a routing matrix, the
Tray in LCC
rear fan tray part
number
is not supported.
fan-name Removed
Temperature Hot
Temperature sensor
failure
Temperature Warm
Solution
Replace the rear fan
tray with part number
760-024613.
760-009870
183