Ex4300 Power System - Juniper EX4300 Series Hardware Manual

Table 29: Fan Module Status LED
LED State
Unlit
Under normal operating conditions, the fan modules operate at a moderate speed. Temperature sensors
in the chassis monitor the temperature within the chassis.
The system raises an alarm if a fan module fails or if the ambient temperature inside the chassis rises
above the acceptable range. If the temperature inside the chassis rises above the threshold temperature,
the system shuts down automatically.
You can check the status of fans and the chassis temperature from the Environment Status option in the
Status menu on the LCD panel. See
RELATED DOCUMENTATION
Field-Replaceable Units in EX4300 Switches | 52
EX4300 Switches Hardware Overview | 2
Prevention of Electrostatic Discharge Damage
Installing a Fan Module in an EX4300 Switch | 293
Removing a Fan Module from an EX4300 Switch | 292

EX4300 Power System

IN THIS SECTION
AC Power Supply in EX4300 Switches | 91
(Continued)
Description
Indicates one of the following:
•
The fan module is not installed.
•
The fan module is not functioning normally.
•
The airflow direction of the fan module does not match with
the airflow direction of other components.
"LCD Panel in EX4300 Switches" on page 54.
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