Juniper EX4100 Hardware Manual page 91

Table 25: AC Power Supply LEDs in EX4100 Switches
LED
AC OK
DC OK
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.
Table 26 on page 83 describes the LEDs on the DC power supplies.
Color
Unlit
Green
Red
Flashing Red
Unlit
Green
Red
Flashing red
Description
Indicates one of the following:
•
The AC power input voltage is not within normal
operating range.
•
The power supply is disconnected from the AC power
feed.
The power supply is receiving proper input power.
The power supply has failed.
This PSU is not receiving power.
Indicates one of the following:
•
AC OK LED is unlit.
•
The power supply is not delivering power correctly.
The power supply is delivering power and is functioning
correctly.
The power supply has failed.
This PSU is not receiving power.
82