Juniper MX240 Hardware Manual page 427

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PEM 0 status:

PEM 2 status:

Make sure that the power and grounding cables are arranged so that they do not

obstruct access to other router components.

Routinely check the status LEDs on the power supply faceplates and the craft interface

to determine if the power supplies are functioning normally.

Check the red and yellow alarm LEDs on the craft interface. 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 command:

user@host> show chassis alarms

Periodically inspect the site to ensure that the grounding and power cables connected

to the router are securely in place and that there is no moisture accumulating near the

Power Supply LEDs on the MX240 Craft Interface on page 15

MX240 AC Power Supply Description on page 90

MX240 DC Power Supply Description on page 92

MX240 Site Preparation Checklist on page 111

Troubleshooting Resources for MX240 Routers on page 401

Chapter 29: Maintaining Components

Troubleshooting