Replacing A Ptx5000 Horizontal Fan Tray; Removing A Ptx5000 Horizontal Fan Tray - Juniper PTX5000 Hardware Manual

• 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).
• Monitor the status of the fans. During normal operation, the fans in each fan tray are functioning at
less than full speed.
The fan trays each contain multiple fans that work in unison to cool the router's components. If one
fan fails, the host subsystem adjusts the speed of the remaining fans to maintain proper cooling. A
red alarm is triggered when a fan fails, and a yellow alarm is triggered when a fan tray is removed.
To display the status of the fans, issue the show chassis fan command.

Replacing a PTX5000 Horizontal Fan Tray

IN THIS SECTION

Removing a PTX5000 Horizontal Fan Tray | 321

Installing a PTX5000 Horizontal Fan Tray | 323
Removing a PTX5000 Horizontal Fan Tray
The upper horizontal fan tray is located below the craft interface, and the lower horizontal fan tray is
located above the horizontal air filter. Each horizontal fan tray weighs about 16.3 lb (7.4 kg).
CAUTION: After removing a fan tray, make sure to immediately insert the new fan tray.
Do not remove both horizontal fan trays at the same time. Removing both front fan
trays might cause the PTX5000 to shut down.
To remove a horizontal fan tray (see
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
one of the ESD points on the chassis.
Figure 1 and Figure 2):
321