All Leds On One Supply Are Off Or Led States Are Not Correct - Juniper Internet Router M160 Hardware Manual

M160 Internet Router Hardware Guide
Excessive system temperature is almost always caused by excessive environmental
temperature. Correct the environmental temperature before powering on the router.

All LEDs on One Supply Are Off or LED States Are not Correct

If either of the following conditions applies, perform the diagnostic
procedure described following the list of conditions:
Perform the following steps to diagnose and correct the problem:
1.
NOTE: The messages in the craft interface LCD and the output from CLI
commands refer to the power supply on the right as
on the left as
2.
216
Troubleshooting the Power System
The LEDs on one power supply are all off, but the LEDs on the other supply
indicate that it is functioning properly.
The LED states on one or both supplies indicate a problem:
On the enhanced power supply, the green LED labeled
the amber LED labeled
is blinking or is not lit.
On the original power supply, the green LED labeled
the amber LED labeled
is lit, or the blue LED labeled
Check the red alarm LED on the craft interface:
If it is lit, read the message on the craft interface LCD. The display
reports the number of alarm conditions and the source of each alarm,
as described in "LCD Alarm Mode" on page 30. For a list of messages,
see "Chassis and Interface Alarm Messages" on page 209. Issue the
following CLI command for more information about the cause of an
alarm condition:
user@host> show chassis alarms
.
PEM 1
A common cause of power supply shutdown is that the temperature of the
power supply or another router component has exceed the maximum
limit.
If the red alarm LED is not lit, check that the power switch is in the
position. The switches are on the circuit breaker box.
Replace the faulty power supply with a spare. For instructions, see "Replacing
a Power Supply" on page 197. If the LEDs light correctly on the spare, the
original power supply is faulty. Return it to Juniper Networks for replacement,
as described in "Contacting Customer Support and Returning Hardware"
on page 255.
is lit, or the blue LED labeled
CB OFF
is lit, or the amber LED labeled
CB OFF
is blinking or is not lit.
OUTPUT OK
PEM 0
is not lit and
CB ON
OUTPUT OK
is not lit and
CB ON
NO AIRFLOW
show
and the power supply
( )
ON |