Component Leds; Juniper Networks Technical Assistance Center; Troubleshooting The Mx480 Cooling System - Juniper MX480 Hardware Manual

Troubleshooting the MX480 Cooling System

Problem
Solution
Copyright © 2019, Juniper Networks, Inc.
SCB LEDs—Two LEDs,
OK
OK and red indicates a failure. The SCB LEDs are located on the left of the craft interface
along the bottom.
Fan LEDs—Two LEDs indicate the status of the fans. Green indicates the fans are
functioning normally and red indicates a fan has failed. The fan LEDs are located on
the upper left of the craft interface.

Component LEDs

The following LEDs are located on various router components and display the status of
those components:
DPC LED—One LED labeled
For more information, see the
FPC LED—One LED labeled
MPC LED—One LED labeled
MIC LED—One LED labeled
For more information, see the
PIC LED—One LED labeled
For more information, see the
SCB LEDs—Three LEDs, labeled
SCB faceplate indicate the status of the SCB. If no LEDs are lit, the master RE might
still be booting or the SCB is not receiving power.
Routing Engine LEDs—Four LEDs, labeled
Routing Engine faceplate indicate the status of the Routing Engine and hard disk drive.
Power supply LEDs—Two LEDs on each power supply faceplate indicate the status of
that power supply.

Juniper Networks Technical Assistance Center

If you need assistance during troubleshooting, you can contact the Juniper Networks
Technical Assistance Center (JTAC) by using the Web or by telephone.
Description: The fans in the fan tray are not functioning normally.
Follow these guidelines to troubleshoot the fans:
Check the fan LEDs and alarm LEDs on the craft interface.
If the red alarm LED on the craft interface lights, use the CLI to get information about
the source of an alarm condition:
If the CLI output lists only one fan failure, and the other fans are functioning normally,
the fan is most likely faulty and you must replace the fan tray.
and , indicate the status of each SCB. Green indicates
FAIL
on each DPC faceplate indicates the DPC's status.
OK/FAIL
MX Series Interface Module Reference
on each FPC faceplate indicates the FPC's status.
OK/FAIL
OK/FAIL on each FPC faceplate indicates the FPC's status.
on each MIC faceplate indicates the MIC's status.
OK/FAIL
MX Series Interface Module Reference
on each PIC faceplate indicates the PIC's status.
OK/FAIL
MX Series Interface Module Reference
FABRIC ACTIVE , FABRIC ONLY
,
MASTER HDD
user@host> show chassis alarms
Chapter 5: Troubleshooting Hardware
.
.
.
, and OK/FAIL , on each
, , and on each
ONLINE FAIL
.
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