Juniper M40E Hardware Manual page 184

M40e Multiservice Edge Router Hardware Guide
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Perform the following steps to diagnose and correct the problem:
Check the red alarm LED on the craft interface:
1.
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 "M40e Craft
Interface LCD Description" on page 36. For a list of messages, see "M40e Chassis
and Interface Alarm Messages" on page 147. 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
and the power supply on the left as
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 an AC-powered router, the switch for each power supply is on the power supply
faceplate. On a DC-powered router, the switches are on the circuit breaker box.
Replace the faulty power supply with a spare. For instructions, see "Replacing an
2.
M40e AC Power Supply" on page 211 and "Replacing an M40e DC Power Supply" on
page 215. 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" on page 307.
If the spare power supply also does not work, connect the router to a different power
3.
source. You might also try replacing the power cord or cable. For instructions, see
Disconnecting and Connecting AC Power from the M40e Router or Disconnecting and
Connecting DC Power on the M40e Router (you do not need to disconnect and
reconnect the grounding cable on a DC-powered router).
If you cannot determine the cause of the problem or need additional assistance, see
4.
"Contacting Customer Support" on page 307.
M40e Power System Description on page 42
M40e Router Power Requirements on page 274
M40e Router LED Overview on page 146
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Copyright © 2010, Juniper Networks, Inc.
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