Juniper Networks EX8208 사용자 설명서

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.