Maintaining The T4000 Fan Trays; Maintaining The T4000 Host Subsystem - Juniper T4000 Hardware Manual
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Also See for T4000:
- Datasheet (4 pages) ,
- Hardware manual (396 pages) ,
- Quick start manual (40 pages)
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Maintaining the T4000 Fan Trays
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Maintaining the T4000 Host Subsystem
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Copyright © 2018, Juniper Networks, Inc.
For procedures to replace the air filters, see the following topics:
Replacing a T4000 Rear Air Filter on page 261
Replacing a T4000 Front Air Filter on page 259
Replacing a T4000 Six-Input DC Power Supply Front Air Filter on page 312
Replacing a T4000 Six-Input DC Power Supply Side Air Filter on page 313
The shelf life of polyurethane filter varies from two years to five years depending on the
storage conditions. Store in a cool, dry, and dark environment. Wrap the media in plastic
and store in an environment with relative humidity between 40%- 80% and temperature
between 40°F (4° C) to 90°F (32° C). Note that if the material flakes, or becomes brittle
when rubbed or deformed, it is no longer usable.
CAUTION:
Always keep the air filters in place while the router is operating.
Because the fans are very powerful, they could pull small bits of wire or other
materials into the router through the unfiltered air intake. This could damage
the router components.
T4000 Cooling System Description on page 25
Maintaining the T4000 Fan Trays on page 335
Troubleshooting the T4000 Cooling System on page 351
For optimum cooling, verify the condition of the fans.
On a regular basis, monitor the status of the fans. The fan trays each contain multiple
fans that work in unison to cool the router components. During normal operation, the
status of each fan is
, and the fans in each fan tray function at normal speed. Use the
OK
show chassis environment
fans.
T4000 Cooling System Description on page 25
Maintaining the T4000 Air Filters on page 334
Troubleshooting the T4000 Cooling System on page 351
For optimum router performance, verify the condition of the Routing Engines and the
control boards.
and
show chassis fan
commands to verify the status of the
Chapter 34: Maintaining Components
335
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Troubleshooting
