Technical data

Field Replaceable Unit Removal and Replacement
Fan Trays
Chapter 1
42
Fan Trays
The 14-Slot Shelf has three interchangeable cooling fan trays that can be hot-swapped. The fan trays are
individual plug-in modules, located at the top rear of the Shelf.
WARNING Electrical Shock Hazard. System power is applied to the 14-Slot Shelf at all times during this
hot-swap removal and replacement procedure. Observe all electrical safety procedures while
working on this hot-swap unit.
Removing a Fan Tray
To remove a fan tray, complete the following steps:
Step 1. Identify the fan tray to be removed. The fan tray LED display alarm LED (#3, Figure 1-7) may be
illuminated.
Figure 1-7Fan Tray, Front and Back View
Step 2. While the 14-Slot Shelf is in normal operation, press and hold the hot-swap (HS) push button (#1,
Figure 1-7) on the fan tray to be removed. The blue hot-swap LED (#2, Figure 1-7) will flash
intermittently, then illuminate continuously. The fan tray is safe to remove when the blue HS LED
is illuminated.