Juniper Networks EX8208 - Manual (Page 78)

Table 28: DC Power Supply LEDs in EX8200 Switches (continued)
Description State LED
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.
Unlit B IN OK
• DC power input voltage is within the normal
operating range (–40 VDC through –72 VDC). Green
• DC input is present on the terminals but either the
fuse is tripped or the ORing diode is open. Yellow
• DC power input voltage is reversed in polarity.
NOTE: The DC power supply is protected against
reverse polarity input for both DC input feeds.
Red
Indicates one of the following:
• DC output voltage is not within normal operating
range.
• Power supply is not supplying DC power correctly.
Unlit OUT OK
• DC power output is within normal operating range. Green
• Power supply has been disabled internally by the
system. Yellow
• Power supply is functioning normally. Unlit FAIL
• On steadily—Power supply has failed.
• Blinking—Demand for output power exceeds the
supply.
Yellow
NOTE: If the IN OK LED and the OUT OK LED are unlit, the power cords are not installed
properly or the power supply has failed.
If the IN OK LED is lit green and the OUT OK LED is unlit, the power supply is not installed
properly or the power supply has an internal failure.
If the FAIL LED is lit, the power supply has failed and must be replaced. If the FAIL LED
is blinking, add a power supply to balance the power demand and supply.
Related Topics DC Power Specifications for EX8200 Switches on page 110 •
• Power Requirements for EX8216 Switch Components
• Connecting DC Power to an EX8200 Switch on page 175
Copyright © 2010, Juniper Networks, Inc. 52
Complete Hardware Guide for EX8208 Ethernet Switches