Maintaining The Mx104 Power System - Juniper MX104 Hardware Manual

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Maintaining the MX104 Power System

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Copyright © 2014, Juniper Networks, Inc.
higher temperatures, or where they can be exposed to ultraviolet (UV) radiation,
hydrocarbon emissions, or vapors from solvents, can significantly reduce their life.
Replacing an MX104 Air Filter on page 89
Routine Maintenance Procedures for the MX104 Router on page 71
For optimum performance, verify the condition of the power supplies and grounding.
On a regular basis:
Inspect the site to ensure that the grounding and power cables connected to the router
are securely in place and that no moisture is accumulating near the router. To review
grounding and site wiring requirements for the packet transport router, see
Router Grounding Specifications" on page
Check the status of the power supplies by issuing the
command.
user@host> show chassis environment pem
PEM 0 status:
State
Temperature
DC Input:
DC Output:
Voltage:
12.0 V output
3.3 V output
PEM 1 status:
State
Make sure that the DC power cables or AC power cords are arranged so that they do
not obstruct access to other packet transport router components.
Check the status LEDs on the PSM faceplates to verify that the power supplies are
functioning normally. During normal operation, the
indicate that the power supply is functioning normally.
For more information about the power supply LEDs, see
page 20.
Check the red and yellow alarm LEDs on the front panel. Power supply failure or removal
triggers an alarm that causes one or both of the LEDs to light. You can display the
associated error messages by issuing the following CLI command:
user@host> show chassis alarms
The power supplies require an unobstructed airflow at both the front and rear of the
chassis. Check the site to ensure that both the air intake at the side of the chassis and
the exhaust from the power supplies are unobstructed.
MX104 Chassis Overview on page 11
Chapter 11: Maintaining MX104 Router Hardware Components
157.
show chassis environment pem
Online
OK
OK
OK
12351 mV
3343 mV
Present
PS STATUS
"Power Supply LEDs" on
"MX104
LED lights green to
75