Juniper EX8208 Complete Hardware Manual page 79

Table 29: DC Power Supply LEDs in EX8200 Switches (continued)
LED
B IN OK
OUT OK
FAIL
Related
Documentation
Copyright © 2010, Juniper Networks, Inc.
State
Unlit
Green
Yellow
Red
Unlit
Green
Yellow
Unlit
Yellow
NOTE: If the
IN OK
not installed properly or the power supply has failed.
If the IN OK LED is lit green and the
not installed properly or the power supply has an internal failure.
If the LED is lit, the power supply has failed and must be replaced. If the
FAIL
FAIL LED is blinking, add a power supply to balance the power demand and
supply.
DC Power Specifications for EX8200 Switches on page 104
Power Requirements for EX8216 Switch Components
Description
Indicates one of the following:
Power supply is disconnected from DC power feed.
DC power input voltage is not within normal
operating range (-40 VDC through -72 VDC).
No DC power input.
DC power input voltage is within the normal
operating range (–40 VDC through –72 VDC).
DC input is present on the terminals but either the
fuse is tripped or the ORing diode is open.
DC power input voltage is reversed in polarity.
NOTE: The DC power supply is protected against
reverse polarity input for both DC input feeds.
Indicates one of the following:
DC output voltage is not within normal operating
range.
Power supply is not supplying DC power correctly.
DC power output is within normal operating range.
Power supply has been disabled internally by the
system.
Power supply is functioning normally.
On steadily—Power supply has failed.
Blinking—Demand for output power exceeds the
supply.
LED and the LED are unlit, the power cords are
OUT OK
OUT OK LED is unlit, the power supply is
Chapter 2: Component Descriptions
53