Juniper PTX5000, Hardware Manual

Page: 597 / 721

Problem
Description
The following alarms or other conditions indicate a problem with the temperature of the hardware
components:
• Table 87 on page 589 lists the alarms.
• The PTX5000 is powered off immediately if the temperature of a component exceeds the
preconfigured maximum
Fire Shutdown
threshold.
Solution
To troubleshoot temperature alarms:
1. Find the source of the problem by looking at the display on the craft interface. The number of alarm
conditions, as well as the source of each alarm, appears on the screen. Issue the show chassis alarms
command to get information about the source of an alarm condition:
user@host> show chassis alarms
2. Verify that there is sufficient air flow. See "PTX5000 Clearance Requirements for Airflow and
Hardware Maintenance" on page 168 , "Maintaining the PTX5000 Fan Trays" on page 320 , and
"Maintaining the PTX5000 Air Filters" on page 329 .
Place your hand near the exhaust vents at the rear of the chassis to determine whether the fans are
pushing air out of the chassis.
• Zone 0: The air exhausts from the left side of the SIBs.
• Zone 1: The exhaust vent is located at the upper rear of the chassis.
• Power system: The air exhausts from the power supply modules (PSMs).
3. Verify that the cooling system in the chassis is operating properly. See "Troubleshooting the
PTX5000 Cooling System" on page 574 .
4. Verify that the room temperature is within acceptable limits. Use the
show chassis temperature-thresholds
to show the temperature thresholds for various components.
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