Dc Power Supply In Qfx5120 Switches - Juniper QFX5120 Series Hardware Manual

Table 19: AC Power Supply LEDs on QFX5120-48Y Switches
LED
AC OK
DC OK
Fault
NOTE: If the AC OK LED and the DC OK LED are not lit green, either the AC power cord is not
installed properly or the power input voltage is not within normal operating range.
If the AC OK LED is lit green and the DC OK LED is unlit or lit red, the AC power supply is installed
properly, but the power supply has an internal failure.

DC Power Supply in QFX5120 Switches

IN THIS SECTION
Characteristics of a DC Power Supply | 58
DC Power Supply Airflow | 59
Color State
Unlit Off
Green On steadily
Unlit Off
Green On steadily
Amber On steadily
Description
The power supply is disconnected from
power, or power is not coming into the
power supply.
Power is coming into the power supply.
The power supply is disconnected from
power, or power is not coming into the
power supply.
The power supply is sending out power
correctly.
An error has been detected in the power
supply. Replace the power supply as soon
as possible. To maintain proper airflow
through the chassis, leave the power
supply installed in the chassis until you are
ready to replace it.
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