Maintaining The M40E Air Filter; Maintaining The M40E Fan Tray And Impellers - Juniper M40E Hardware Manual

M40e Multiservice Edge Router Hardware Guide

Maintaining the M40e Air Filter

Purpose
Action
Related
Documentation

Maintaining the M40e Fan Tray and Impellers

Purpose
Action
130
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Verify the condition of the air filter.
Check the air filter regularly for dust and debris.
Replace the air filter every 6 months. The air filter is hot-removable and hot-insertable,
as described in "M40e Field-Replaceable Units (FRUs)" on page 157. Take note of the
following caution, however.
CAUTION: Do not operate the router for more than a few minutes when
the air filter has been removed. The fans and impellers are powerful enough
to draw in foreign material, such as bits of wire, through the unfiltered air
intake, which could damage router components.
M40e Cooling System Description on page 48
Troubleshooting the Cooling System on the M40e Router on page 150
M40e Clearance Requirements for Airflow and Hardware Maintenance on page 71
Verify the condition of the fan tray and impellers.
The fan tray is attached to the back of the cable management system and installs into
the front of the chassis, as shown in "M40e Chassis Description" on page 8. There are
also three separate, non-interchangeable impeller assemblies. The front impeller is
located behind the craft interface (shown in "M40e Chassis Description" on page 8)
and works together with the fan tray to cool the FPCs and midplane. The upper and lower
impellers on the rear of the chassis (shown in "M40e Chassis Description" on page 8)
work together to cool the components that install into the rear of the chassis.
To check the status of the impellers and the fans in the fan tray, issue the
show chassis environment
(which it refers to as a
Blower
user@host> show chassis environment
Class Item
...
Fans Rear Bottom Blower
Rear Top Blower
Front Top Blower
Fan Tray Rear Left
Fan Tray Rear Right
Fan Tray Front Left
Fan Tray Front Right
...
command. The output includes an entry for each impeller
) and for each fan in the fan tray:
Status Measurement
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
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