Juniper MX80 Hardware Guide

DC Output: OK
PEM 1 status:
State Online
Temperature OK
DC Output: OK
• If a red alarm condition occurs, issue the show chassis alarms command to determine
the source of the problem.
• If all power supplies have failed, the system temperature might have exceeded the
threshold, causing the system to shut down.
NOTE: If the system temperature exceeds the threshold, the Junos OS
shuts down all power supplies so that no status is displayed.
The Junos OS also can shut down one of the power supplies for other
reasons. In this case, the remaining power supplies provide power to the
router, and you can still view the system status through the CLI or display.
• Check that the AC input switch or DC circuit breaker is in the on ( | ) position and is
receiving power.
• Verify that the source circuit breaker has the proper current rating. Each power supply
must be connected to a separate source circuit breaker.
• Verify that the AC power cord or DC power cables from the power source to the router
are not damaged. If the insulation is cracked or broken, immediately replace the cord
or cable.
• Connect the power supply to a different power source with a new power cord or power
cables. If the power supply status LED indicates that the power supply is not operating
normally, the power supply is the source of the problem. Replace the power supply
with a spare.
NOTE: If the cause of power failure is due to lightening, power off the power
supply module and then power it on again. If the power supply module is
working properly, it comes back with its LED in the green state. If there are
no abnormal causes for the power supply module failure, or if the power
supply module LED is still red after powering off and powering on again, then
try reseating the power supply module and if it does not work, then try to
install it in a different slot.
See Also • MX5, MX10, MX40, and MX80 Power System Description on page 32
• MX5, MX10, MX40, and MX80 Power Supply LED on page 34
• show chassis environment pem
131Copyright © 2019, Juniper Networks, Inc.
Chapter 5: Troubleshooting Hardware

Juniper MX80 Specifications

General

Model	MX80
Category	Network Router
Throughput	80 Gbps
Power Supply	AC or DC
Operating System	Junos OS
Memory	4 GB
Height	1U