Juniper QFX5220, Руководство по оборудованию, Страница: 149 / 247

Maintaining QFX5220 Cooling System
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How to Remove a Fan Module from a QFX5220 | 153
How to Remove a Fan Module in a QFX5220 | 155
The fan modules in QFX5220 are hot-removable and hot-insertable field-replaceable units (FRUs): you
can remove and replace one of them without powering off the switch or disrupting switching function.
CAUTION: To ensure proper airflow, keep a failed fan module in place until you have a
replacement fan module at hand. Do not run the device with an open fan tray slot for an
extended amount of time.
How to Remove a Fan Module from a QFX5220
Before you remove a fan module from a QFX5220, ensure that you have taken the necessary precautions
to prevent electrostatic discharge (ESD) damage (see “Prevention of Electrostatic Discharge Damage” on
page 235 ).
Ensure that you have the following parts and tools available to remove a fan module from a QFX5220:
•
ESD grounding strap
•
Antistatic bag or an antistatic mat
To remove a fan module from a QFX5220 (see Figure 60 on page 154 for QFX5220-32CD and
Figure 61 on page 155 for QFX5220-128C):
1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis.
3. Loosen the locking screw (3 or 4 turns) using a Phillips number 2 screwdriver..
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