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:
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
CB ON
is not lit and
the amber LED labeled
CB OFF
is lit, or the blue LED labeled
OUTPUT OK
is blinking or is not lit.
On the original power supply, the green LED labeled
CB ON
is not lit and
the amber LED labeled
CB OFF
is lit, or the amber LED labeled
NO AIRFLOW
is lit, or the blue LED labeled
OUTPUT OK
is blinking or is not lit.
Perform the following steps to diagnose and correct the problem:
1.
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
NOTE:
The messages in the craft interface LCD and the output from CLI
show
commands refer to the power supply on the right as
PEM 0
and the power supply
on the left as
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
ON
(
|
)
position. The switches are on the circuit breaker box.
2.
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.
216
Troubleshooting the Power System
Summary of Contents for Internet Router M160
Page 12: ...M160 Internet Router Hardware Guide xii Table of Contents ...
Page 16: ...M160 Internet Router Hardware Guide xvi List of Figures ...
Page 18: ...M160 Internet Router Hardware Guide xviii List of Tables ...
Page 24: ...M160 Internet Router Hardware Guide xxiv Requesting Support ...
Page 26: ...2 Product Overview ...
Page 30: ...M160 Internet Router Hardware Guide 6 Safety Requirements Warnings and Guidelines ...
Page 66: ...M160 Internet Router Hardware Guide 42 Cable Management System ...
Page 80: ...M160 Internet Router Hardware Guide 56 Routing Engine Architecture ...
Page 82: ...58 Initial Installation ...
Page 104: ...M160 Internet Router Hardware Guide 80 Unpacking the Router ...
Page 148: ...M160 Internet Router Hardware Guide 124 Configuring the JUNOS Internet Software ...
Page 150: ...126 Hardware Maintenance Replacement and Troubleshooting Procedures ...
Page 242: ...M160 Internet Router Hardware Guide 218 Troubleshooting the Power System ...
Page 244: ...220 Appendixes ...
Page 292: ...M160 Internet Router Hardware Guide 268 Packing Components for Shipment ...
Page 301: ...Part 5 Index Index 277 ...
Page 302: ...278 Index ...