Maintaining Cooling System Components; Maintaining The Air Filter; Maintaining The Fan Tray - Juniper SRX 5600 Hardware Manual

SRX 5600 Services Gateway Hardware Guide

Maintaining Cooling System Components

This section discusses the following topics:

Maintaining the Air Filter

A dirty air filter restricts airflow in the unit, reducing the ventilation of the chassis.
The filter degrades over time. Periodically replace the filter in use, as well as spares.
We recommend that you replace the filter every 6 months. For procedures to replace
the air filter, see "Replacing the Air Filter" on page 106.
CAUTION: Always keep the air filter in place while the services gateway is operating.
Because the fans are very powerful, they could pull small bits of wire or other
materials into the device through the unfiltered air intake. This could damage the
device components.
Use spare filters within one year of manufacture. Check the date of manufacture
printed on the filter. Store spare air filters in a dark, cool, and dry place. Storing air
filters at higher temperatures, or where they can be exposed to ultraviolet (UV)
radiation, hydrocarbon emissions, or vapors from solvents, can significantly reduce
their life.

Maintaining the Fan Tray

The fan tray contains multiple fans that work in unison to cool the services gateway
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 and red alarm is triggered when a fan tray is removed.
To display the status of the cooling system, issue the
command. The output is similar to the following:
user@host> show chassis environment
Class Item
Temp PEM 0
PEM 1
PEM 2
PEM 3
Routing Engine 0
Routing Engine 1
80

Maintaining Cooling System Components

Inspect the air filter at the left rear of the device, replacing it every 6 months for
optimum cooling system performance. Do not run the device for more than a
few minutes without the air filter in place. For maintenance instructions, see
"Maintaining the Air Filter" on page 80.
Maintaining the Air Filter on page 80
Maintaining the Fan Tray on page 80
Status Measurement
OK 35 degrees C / 95 degrees F
OK 35 degrees C / 95 degrees F
Absent
Absent
OK 35 degrees C / 95 degrees F
Absent
show chassis environment