Ac Power Supply Leds In Ex4200 Switches; Dc Power Supply Leds In Ex4200 Switches - Juniper EX4200 Hardware Manual

AC Power Supply LEDs in EX4200 Switches

Table 12 on page 52 describes the LEDs on the AC power supplies.
Table 12: AC Power Supply LEDs
LED
AC OK
DC OK
NOTE: If the AC OK LED and the DC OK LED are unlit, either the AC power cord is not installed
properly or the power supply fuse has failed. If the AC OK LED is lit and the DC OK LED is unlit,
the AC power supply is not installed properly or the power supply has an internal failure.

DC Power Supply LEDs in EX4200 Switches

. Table 13 on page 52 describes the LEDs on the DC power supplies.
Table 13: DC Power Supply LEDs
LED Label
LED A
LED B
LED A
LED B
LED A
LED B
State and Description
Off—Disconnected from power or power is not coming into the
power supply.
On—Power is coming into the power supply.
Off—Power supply is not sending out power correctly.
On—Power supply is sending out power correctly.
Color Description
Red Inputs A and B are normal, but there is no output.
Red
Green Inputs A and B are normal; output is normal.
Green
Flash Red Input A has failed because the power supply fuse has failed,
input voltage is low, or there is a loose connection; output is
normal.
Green
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