Juniper EX4400 - Page 121

Table 65: Power Supply LED in EX4400 Switches
Color State Descripon
Green On steadily The power supply is receiving input and is providing proper output to the switch.
Blinking The fan in the power supply has failed or there is an internal communicaon failure in
the power supply; you must replace it.
Unlit Indicates one of the following:
• The power cord might not be installed properly.
• The power supply is not receiving power correctly. Verify that the input voltage
range is correct.
• The power supply is in standby mode.
• The ambient temperature is high and the power supply has shut down. Ensure
that the temperature is between 32° F and 113° F (between 0° C and 45° C).
•
There is a crical failure in the power supply and it has shut down. You must
replace it.
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