- play_arrow Overview
- play_arrow Site Planning, Preparation, and Specifications
- play_arrow Initial Installation and Configuration
- Unpacking and Mounting the EX4300 Switch
- Connecting the EX4300 to Power
- Connecting the EX4300 to External Devices
- Register Products—Mandatory to Validate SLAs
- Connecting the EX4300 to the Network
- Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis
- Configuring Junos OS on the EX4300
- Dashboard for EX Series Switches
- play_arrow Troubleshooting Hardware
- play_arrow Contacting Customer Support and Returning the Chassis or Components
- play_arrow Safety and Compliance Information
- General Safety Guidelines and Warnings
- Definitions of Safety Warning Levels
- Qualified Personnel Warning
- Warning Statement for Norway and Sweden
- Fire Safety Requirements
- Installation Instructions Warning
- Chassis and Component Lifting Guidelines
- Restricted Access Warning
- Ramp Warning
- Rack-Mounting and Cabinet-Mounting Warnings
- Wall-Mounting Warning for EX4300 Switches
- Grounded Equipment Warning
- Radiation from Open Port Apertures Warning
- Laser and LED Safety Guidelines and Warnings
- Maintenance and Operational Safety Guidelines and Warnings
- General Electrical Safety Guidelines and Warnings
- Action to Take After an Electrical Accident
- Prevention of Electrostatic Discharge Damage
- AC Power Electrical Safety Guidelines
- AC Power Disconnection Warning
- DC Power Electrical Safety Guidelines for EX4300 Switches
- DC Power Disconnection Warning
- DC Power Grounding Requirements and Warning
- DC Power Wiring Sequence Warning
- DC Power Wiring Terminations Warning
- Multiple Power Supplies Disconnection Warning
- TN Power Warning
- Agency Approvals for EX Series Switches
- Compliance Statements for EMC Requirements for EX Series Switches
- Compliance Statements for Acoustic Noise for EX Series Switches
- Statements of Volatility for Juniper Network Devices
Maintaining the EX4300 Cooling System
Removing a Fan Module from an EX4300 Switch
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
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.
The fan module slots are at the left end of the rear panel on 24-port and 48-port switches, and at the right end on 32-port switches. Figure 1 shows how to remove a fan module from 24- port or 48-port switches. The procedure is the same for 32-port switches.
Both the fan modules must be installed and operational for optimal functioning of the switch.
See Also
Installing a Fan Module in an EX4300 Switch
Before you install a fan module in the switch:
Ensure you understand how to prevent electrostatic discharge (ESD) damage. See Prevention of Electrostatic Discharge Damage.
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
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.
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.
The fan module slots are at the left end of the rear panel on 24-port and 48-port switches, and at the right end on 32-port switches. Figure 2 shows how to install a fan module in 24- port or 48-port switches. The procedure is the same for 32-port switches.
- 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.
- Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
- Remove the fan module from its bag.
- 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.
- 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.
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.
