Juniper EX4100

Table 25: AC Power Supply LEDs in EX4100 Switches
LED Color Descripon
AC OK Unlit Indicates one of the following:
• The AC power input voltage is not within normal
operang range.
• The power supply is disconnected from the AC power
feed.
Green The power supply is receiving proper input power.
Red The power supply has failed.
Flashing Red This PSU is not receiving power.
DC OK Unlit Indicates one of the following:
• AC OK LED is unlit.
• The power supply is not delivering power correctly.
Green The power supply is delivering power and is funconing
correctly.
Red The power supply has failed.
Flashing red This PSU is not receiving power.
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 operang 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.
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