Maintaining The Mx480 Fan Tray; Figure 91: Installing The Air Filter - Juniper MX480 Hardware Manual

MX480 Universal Routing Platform Hardware Guide
See Also

Maintaining the MX480 Fan Tray

Purpose
Action
236

Figure 91: Installing the Air Filter

Preventing Electrostatic Discharge Damage to an MX480 Router on page 388
MX480 Cooling System Description on page 41
Troubleshooting the MX480 Cooling System on page 355
For optimum cooling, verify the condition of the fans.
Monitor the status of the fans. A fan tray contains 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 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
CB 0 Intake
CB 0 Exhaust A
CB 0 Exhaust B
CB 0 ACBC
CB 0 SF A
CB 0 SF B
CB 1 Intake
CB 1 Exhaust A
show chassis environment
Status Measurement
OK 40 degrees C / 104 degrees F
Absent
Absent
OK 40 degrees C / 104 degrees F
OK 39 degrees C / 102 degrees F
OK 42 degrees C / 107 degrees F
OK 26 degrees C / 78 degrees F
OK 27 degrees C / 80 degrees F
OK 27 degrees C / 80 degrees F
OK 26 degrees C / 78 degrees F
OK 37 degrees C / 98 degrees F
OK 35 degrees C / 95 degrees F
OK 27 degrees C / 80 degrees F
OK 30 degrees C / 86 degrees F
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