Juniper ACX5048 Hardware Manual page 135

CAUTION:
removal to prevent chassis overheating. Before removing the fan module, ensure you
have a replacement fan module at hand.
NOTE: The fan module provides port-to-FRU airflow (AFO).
Before you install a fan module in a ACX5000 router, ensure that you have taken the necessary precautions
to prevent electrostatic discharge (ESD) damage (see
page 196).
To install a fan module in an ACX5000 router (see
1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis.
2. Taking care not to touch the connectors, remove the fan module from its bag.
3. Align the module with the open slot on the management panel of the chassis and slide it in until it is
fully seated.
CAUTION:
with a different airflow direction. Compare the router product SKU with the airflow
marking on the handle to ensure that you are installing a fan module with the same
airflow direction as the chassis. The fan modules are designed so that they can only
be inserted into the ACX5000 product SKU that supports the same airflow type.
See "Cooling System and Airflow in an ACX5000 Router" on page 60
information.
4. Using a Phillips screwdriver, turn the locking screw until it is tight.
Figure 49: Installing a Fan Module in a 1 U ACX5048
Replace a failed fan module with a new fan module within 1 minute of
Figure 49 on page 135
Damage can occur if you attempt to install a fan module into a chassis
"Prevention of Electrostatic Discharge Damage" on
and Figure 50 on page 136):
for more
135