Juniper EX4500 Series, Руководство по оборудованию, Страница: 190 / 327

Maintaining the Cooling System in an EX4500 Switch
IN THIS SECTION
Removing a Fan Tray from an EX4500 Switch | 190
Installing a Fan Tray in an EX4500 Switch | 192
Removing a Fan Tray from an EX4500 Switch
An EX4500 switch has a single fan tray. The fan tray is a hot-removable and hot-insertable field-replaceable
unit (FRU); you can remove and replace the fan tray while the switch is running without turning off power
to the switch or disrupting switching functions.
CAUTION: Do not remove the fan tray unless you have a replacement fan tray available.
The fan tray is installed horizontally on the rear of the chassis.
Before you remove a fan tray:
•
Ensure you understand how to prevent ESD damage. See “Prevention of Electrostatic Discharge Damage”
on page 305 .
Ensure that you have the following parts and tools available to remove a fan tray from the switch chassis:
•
Electrostatic discharge (ESD) grounding strap
•
Replacement fan tray
•
An antistatic bag or an antistatic mat
CAUTION: The fan tray can be removed and replaced while the switch is operating.
However, the fan tray must be replaced within 30 seconds of removing the fan tray
to prevent overheating of the chassis.
To remove a fan tray from the switch chassis (see Figure 51 on page 191 ):
190