Juniper Networks E-Series manual Replacing Fan Trays, 7Fan tray in ERX-14xx model

Replacing Fan Trays E-Series Routers

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Replacing Fan Trays

A tray of cooling fans provides forced air cooling for components in the E-series router. The fan trays are hot-swappable and can be replaced without powering down the system. However, if you do not replace the fan tray within a few minutes, the system enters thermal protection mode. For information about thermal protection mode, see Monitoring Temperatures of Modules in Chapter 10, Troubleshooting.

Caution: If the FAN FAIL LED on the SRP module is illuminated and none of the fans are spinning when you remove the fan tray, power down the system until a new fan tray is available. Operating an E-series router with inadequate air circulation may damage the modules.

Caution: Do not use the fan tray handle to carry the fan tray assembly. Use the handle only to pull the tray out of the chassis.

Fan tray

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Figure 9-7Fan tray in ERX-14xx model