M160 Internet Router Hardware Guide
is attached to a proper earth ground. For more information about ESD, see
“Preventing ElectrostaticDischarge Damage” on page 226.
2. Grasp the sides of the air filter and push it firmly into place over the air
intake vent.
3. Tighten the thumbscrewat each corner of the air filter cover.
Figure 63: Installing the Air Filter
1218
Air filter
Air filter cover
Maintaining the Fan Tray and Impellers
The fan tray is attached tothe back of the cable management system and
installs into the frontof the chassis, as shown in Figure 1. There are also
three separate,non-interchangeable impeller assemblies. The front impeller
is located behind the craft interface (shown in Figure 1) and work s together
with the fan tray to cool the FPCs and midplane. The upper and lower
impellers on the rear of the chassis(shown in Figure 2) work together to cool
the components that install into the rear of the chassis.
To check thestatus of the impellers and the fans in the fan tray, issue the
show chassis environment command. The output i ncludes an entry for each impeller
(which it refers toas a Blower) and for each fan in the fan tray:
user@host> show chassis environment
Class Item Status Measurement
...
Fans Rear Bottom Blower OK Spinning at normal speed
Rear Top Blower OK Spinning at normal speed
Front Top Blower OK Spinning at normal speed
Fan Tray Rear Left OK Spinning at normal speed
Fan Tray Rear Right OK Spinning at normal speed
Fan Tray Front Left OK Spinning at normal speed
Fan Tray Front Right OK Spinning at normal speed
...
130 Maintaining Cooling System Components