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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.
Related
Documentation
Power Supply in EX4200 Switches on page 33
•
•
Connecting AC Power to an EX4200 Switch on page 177
DC Power Supply LEDs in EX4200 Switches
The DC power supply is installed on the rear panel of the switch.
Table 14 on page 38
describes the LEDs on the DC power supplies.
Table 14: DC Power Supply LEDs
Description
Color
LED Label
Inputs A and B are normal, but there is no output.
Red
LED A
Red
LED B
Inputs A and B are normal; output is normal.
Green
LED A
Green
LED B
Input A has failed because the power supply fuse has failed,
input voltage is low, or there is a loose connection; output is
normal.
Flash Red
LED A
Green
LED B
Input B has failed because the power supply fuse has failed,
input voltage is low, or there is a loose connection; output is
normal.
Green
LED A
Flash Red
LED B
Both inputs have failed because the power supply fuse has
failed, input voltage is low, or there is a loose connection;
output is normal.
Flash Red
LED A
Flash Red
LED B
There is no input; there is no output.
Off
LED A
Off
LED B
Related
Documentation
•
Power Supply in EX4200 Switches on page 33
•
Connecting DC Power to an EX4200 Switch on page 179
Copyright © 2015, Juniper Networks, Inc.
38
EX4200 Switch Hardware Guide
Содержание EX4200 Series
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