Maintaining the EX4300 Cooling System

 

Removing a Fan Module from an EX4300 Switch

The fan module in EX4300 switches is a hot-removable and hot-insertable field-replaceable unit (FRU) installed in the rear panel of the switch: You can remove and replace it without powering off the switch or disrupting switch functions.

Ensure that you have the following parts and tools available:

  • Phillips (+) screwdriver, number 2

  • An antistatic bag or an antistatic mat

  • A replacement fan module

Note

The fan module slots are at the left side of the rear panel on 24-port and 48-port switches, and at the right side on 32-port switches. Figure 1 shows how to remove a fan module from 24- port or 48-port switches except EX4300-48MP and EX4300-48MP-S switches. The procedure is the same for 32-port switches. Figure 2 shows how to remove a fan module from EX4300-48MP and EX4300-48MP-S switches.

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Loosen the captive screws on the front faceplate of the fan module by using your fingers. If you are unable to loosen the captive screws by using your fingers, use the screwdriver.Warning

    To prevent injury, do not touch the fan with your hands or any tools as you slide the fan module out of the chassis—the fan might still be running.

  3. Grasp the handle on the fan module and pull it firmly to slide the fan module out of the chassis.
  4. Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
  5. Install the replacement fan.
  6. Tighten the captive screws on the faceplate of the fan module by using your fingers. If you are unable to tighten the captive screws by using your fingers, use the screwdriver.
Figure 1: Removing a Fan Module from EX4300 Switches Except EX4300-48MP and EX4300-48MP-S Switches
Removing
a Fan Module from EX4300 Switches Except EX4300-48MP and EX4300-48MP-S
Switches
Figure 2: Removing a Fan Module from EX4300-48MP and EX4300-48MP-S Switches
Removing
a Fan Module from EX4300-48MP and EX4300-48MP-S Switches
Note

Both the fan modules must be installed and operational for optimal functioning of the switch.

Installing a Fan Module in an EX4300 Switch

Each fan module is a hot-removable and hot-insertable field-replaceable unit (FRU) installed in the rear panel of the switch: You can remove and replace it without powering off the switch or disrupting switch functions.

Caution

Do not mix:

  • Fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.

  • Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.

  • Power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.

  • AC and DC power supplies in the same chassis.

Before you install a fan module in the switch:

Ensure that you have the following parts and tools available to install a fan module in the switch chassis:

  • ESD grounding strap

  • Phillips (+) screwdriver, number 2

Note

The fan module slots are at the left side of the rear panel on 24-port and 48-port switches, and at the right side on 32-port switches. Figure 3 shows how to install a fan module in 24- port or 48-port switches except EX4300-48MP and EX4300-48MP-S switches. The procedure is the same for 32-port switches. Figure 4 shows how to install a fan module in EX4300-48MP and EX4300-48MP-S switches.

  1. Ensure that you have the correct fan module. The label AIR IN (AFI) or AIR OUT (AFO) on the fan module must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed power supply.
  2. Wrap and fasten one end of an ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
  3. Remove the fan module from its bag.
  4. Hold the handle of the fan module with one hand and support the weight of the module with the other hand. Place the fan module in the fan module slot on the rear panel of the switch and slide it in until it is fully seated.
  5. Tighten the captive screws on the faceplate of the fan module by using your fingers. If you are unable to tighten the captive screws by using your fingers, use the screwdriver.
Figure 3: Installing a Fan Module in EX4300 Switches Except EX4300-48MP and EX4300-48MP-S Switches
Installing a
Fan Module in EX4300 Switches Except EX4300-48MP and EX4300-48MP-S
Switches
Figure 4: Installing a Fan Module in EX4300-48MP and EX4300-48MP-S Switches
Installing
a Fan Module in EX4300-48MP and EX4300-48MP-S Switches
Note

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.