Juniper QFX5220, Руководство по оборудованию, Страница: 157 / 247

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Ensure that the airflow direction of the power supply is the same as the chassis. Labels on the power
supply handle indicate the direction of airflow. See “QFX5220 Cooling System” on page 52 for more
information.
To install a power supply in a QFX5220 (see Figure 68 on page 161 ):
1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis.
2. Take care not to touch power supply components, pins, leads, or solder connections as you remove
the power supply from its bag.
CAUTION: Verify that the direction of the arrow on the power supply handle matches
the direction of airflow in the chassis. Ensure that each power supply you install in
the chassis has the same airflow direction. If you install power supplies with two
different airflow directions, Junos OS raises an alarm, and the status (ALM) LED blinks
amber.
3. If the power supply has a protective plastic wrap, peel and remove the plastic wrap from all four sides
of the power supply.
4. Using both hands, place the power supply in the power supply slot on the FRU panel of the switch and
slide it in until it is fully seated and the locking lever slides into place. See Figure 68 on page 161 and
Figure 69 on page 162 .
Figure 68: Installing a QFX5220-32CD AC Power Supply
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