Maintaining The T1600 Fan Trays - Juniper T1600 Hardware Manual

Figure 91: Airflow Through the Chassis
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Maintaining the T1600 Fan Trays

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Copyright © 2010, Juniper Networks, Inc.
Check the air filters regularly for dust and debris. The filter elements degrade over time,
so the filter elements in use, must be replaced every 6 months. For procedures to replace
the air filters, see "Replacing the T1600 Rear Air Filter" on page 208 and "Replacing the
T1600 Front Air Filter" on page 206.
Spare filter elements should be used within one year of manufacture. Check the date of
manufacture printed on the filter. Store spare filter elements in a dark, cool, and dry place.
Storing the filter elements at higher temperatures, or where they can be exposed to
ultraviolet (UV) radiation, hydrocarbon emissions, or vapors from solvents, can
significantly reduce their life.
CAUTION: Always keep both 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.
T1600 Cooling System Description on page 69
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. If one fan fails, the host subsystem adjusts the
speed of the remaining fans to maintain proper cooling. A red alarm is triggered when
a fan fails, and a yellow alarm is triggered when a fan tray is removed.
Chapter 15: Maintaining T1600 Router Hardware Components
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