Juniper PTX Series - Page 149

3. If the craft interface display lists only one fan failure and the other fans are functioning
normally, the fan is probably faulty and you need to replace the fan tray.
4. 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).
5. Use the show chassis fan command to verify that the status of each fan is OK.
NOTE: Fan Tray 0 and Fan Tray 1 refer to the fans in the horizontal fan trays
that cool zone 1, and Fan Tray 2 refers to fans in the vertical fan tray that
cools zone 0.
user@host> show chassis fan
Item Status % RPM Measurement
Fan Tray 0 Fan 1 OK 32% 3000 RPM
Fan Tray 0 Fan 2 OK 33% 3042 RPM
Fan Tray 0 Fan 3 OK 33% 3042 RPM
Fan Tray 0 Fan 4 OK 33% 3042 RPM
Fan Tray 0 Fan 5 OK 33% 3042 RPM
Fan Tray 0 Fan 6 OK 33% 3042 RPM
Fan Tray 0 Fan 7 OK 32% 3000 RPM
Fan Tray 0 Fan 8 OK 33% 3042 RPM
Fan Tray 0 Fan 9 OK 33% 3085 RPM
Fan Tray 0 Fan 10 OK 33% 3042 RPM
Fan Tray 0 Fan 11 OK 34% 3128 RPM
Fan Tray 0 Fan 12 OK 34% 3128 RPM
Fan Tray 0 Fan 13 OK 35% 3257 RPM
Fan Tray 0 Fan 14 OK 33% 3042 RPM
Fan Tray 1 Fan 1 OK 30% 2199 RPM
Fan Tray 1 Fan 2 OK 31% 2299 RPM
Fan Tray 1 Fan 3 OK 30% 2166 RPM
Fan Tray 1 Fan 4 OK 32% 2333 RPM
Fan Tray 1 Fan 5 OK 31% 2233 RPM
Fan Tray 1 Fan 6 OK 32% 2366 RPM
Fan Tray 2 Fan 1 OK 31% 2266 RPM
Fan Tray 2 Fan 2 OK 31% 2233 RPM
Fan Tray 2 Fan 3 OK 33% 2399 RPM
Fan Tray 2 Fan 4 OK 31% 2266 RPM
Fan Tray 2 Fan 5 OK 32% 2333 RPM
Fan Tray 2 Fan 6 OK 30% 2166 RPM
6. Use the show chassis zones command to verify the status of each cooling zone.
user@host> show chassis zones
ZONE 0 Status
Driving FRU Routing Engine 0
Temperature 72 degrees C / 161 degrees F
Condition OK
123Copyright © 2012, Juniper Networks, Inc.
Chapter 14: Troubleshooting Packet Transport Switch Hardware Components