Maintain and Replace the Fan Tray

The fan tray is located at the rear of the chassis, beneath the upper impeller assembly (see Figure 2). To check the status of the fans in the fan tray, issue the show chassis environment command. The output refers to the individual fans in the fan tray as the Rear Left Fan, Rear Center Fan, and Rear Right Fan:

user@host> show chassis environment

Class Item                   Status     Measurement

. . .

Fans  Top Impeller           OK         Spinning at normal speed

      Bottom Impeller        OK         Spinning at normal speed

      Rear Left Fan          OK         Spinning at normal speed

      Rear Center Fan        OK         Spinning at normal speed

      Rear Right Fan         OK         Spinning at normal speed

. . .

For further description of the output from the command, see the JUNOS Internet Software Operational Mode Command Reference: Protocols, Class of Service, Chassis, and Management.

To replace the fan tray, perform the following procedures:

• Remove the Fan Tray
• Install the Fan Tray