Juniper QFX5220, Руководство по оборудованию, Страница: 153 / 247

CAUTION: Damage can occur if you attempt to install a fan module into a chassis
with a different airflow direction. Compare the switch product variant 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 QFX5220 product variant that supports the same airflow type.
See “QFX5220 Power System” on page 61 for more information.
4. Use a Phillips number 2 screwdriver to tighten the locking screw.
RELATED DOCUMENTATION
QFX5220 Power System | 61
QFX5220 Management Panel | 45
Maintaining the QFX5220 Power System
IN THIS SECTION
How to Remove a Power Supply from a QFX5220 | 157
How to Install an AC Power Supply in a QFX5220 | 160
A QFX5220 power supply module (PSM) is a hot-removable and hot-insertable field-replaceable unit (FRU).
You can install replacement power supplies without powering off the switch or disrupting the switching
function.
How to Remove a Power Supply from a QFX5220
The QFX5220-32CD is shipped from the factory with two power supplies, while the QFX5220-128C is
shipped with four power supplies. See Figure 64 on page 158 and Figure 65 on page 158 .
157