Troubleshooting The T640 Cooling System - Juniper T640 Hardware Manual

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Troubleshooting the T640 Cooling System

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Copyright © 2013, Juniper Networks, Inc.
Table 41: SONET/SDH Interface Alarm Messages (continued)
LCD Message
interface-name so-x/x/x LRDI
interface-name so-x/x/x PAIS
interface-name so-x/x/x PLL
interface-name so-x/x/x PMIS
interface-name so-x/x/x PRDI
interface-name so-x/x/x REI
interface-name so-x/x/x SEF
interface-name so-x/x/x UNEQ
T640 Chassis Description on page 13
T640 Craft Interface Alarm LEDs and ACO/LT Button on page 52
Replacing a T640 Craft Interface on page 254
The following alarms, LEDs, and other conditions indicate a problem with the cooling
system:
A red alarm indicates that temperature of the router exceeds the maximum
("temperature hot") threshold.
Automatic shutdown of the power supplies was caused by the temperature of the
router exceeding the maximum ("temperature hot") threshold. The control board turns
off the power supplies because the router temperature exceeds the acceptable
maximum.
A red alarm indicates that a fan failed.
A yellow alarm indicates that the router temperature exceeds the "temperature warm"
threshold.
A yellow alarm indicates that one of the fan trays was removed.
One or more fans in a fan tray function at full speed. The control boards constantly
monitor the temperatures detected by sensors on the midplane and router components,
adjusting the speed of the fans as necessary.
Chapter 16: Troubleshooting T640 Router Hardware Components
CLI Message
interface-name so-x/x/x - SONET line remote defect
indicator
interface-name so-x/x/x - SONET path AIS
interface-name so-x/x/x - SONET PLL lock
interface-name so-x/x/x - SONET path mismatch
interface-name so-x/x/x - SONET path remote defect
indicator
interface-name so-x/x/x - SONET remote error indicator
interface-name so-x/x/x - SONET severely errored frame
interface-name so-x/x/x - SONET unequipped
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