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Replacing Fan Trays

A tray of cooling fans provides forced air cooling for components in the ERX-1400 series and ERX-700 series. The location of the fans depends on the model. The ERX-700 series and ERX-1400 series support hot-swapping of the fan tray. Hot-swapping allows you to replace the fan tray without powering down the system. However, if you do not replace the fan tray within a few minutes, the system will go into thermal protection mode. For information about thermal protection mode, see Monitoring Temperatures of Modules in Chapter 8, 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 ERX system with inadequate air circulation may damage the modules.

ERX-1400 Series

Figure 7-7 and Figure 7-8 show the location of the fan tray in the ERX-1400 series.


Figure 7-7 Position of fan tray behind top bezel of ERX-1400 series


Figure 7-8 Fan tray in ERX-1400 series

Removing the Fan Tray



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.

To remove the fan tray:

  1. Place a flathead screwdriver in the groove where the top bezel meets the chassis on the top of the system, and lever the top bezel off the front of the system.
  2. With a flathead screwdriver, loosen the four captive screws located at the corners of the fan tray.


Warning: Do not place your fingers near the fans when removing the fan tray. The blades may still be moving.

  1. Pull the fan tray halfway out of the shelf.


Warning: Slowly slide the fan tray out of the chassis. The tray has no stops to prevent it from sliding all the way out.

  1. Pull the tray out of the chassis.

Installing the Fan Tray

To install the fan tray:



Caution: Do not use the fan tray handle to carry the fan tray assembly. Use the handle only to push the tray into the chassis.

  1. Hold the tray vertically so that the captive screws point towards you and you can read text on the labels.
  2. Place the bottom corners of the tray housing in the plastic shelf guides of the fan tray compartment; push toward the back of the chassis halfway, and stop.
  3. Push the fan tray toward the back of the shelf until it stops.

There is an electrical connector on the back of the fan tray that pairs with an electrical connector at the back of the shelf.

  1. With a flathead screwdriver, tighten the captive screws.

Alternate between screws when tightening them to ensure that the electrical connectors at the back of the tray fit tightly.

  1. Push the top bezel back on the front of the system.

ERX-700 Series

Figure 7-9 shows the location of the fan tray in the ERX-700 series.


Figure 7-9 Location of fan tray on the front of the ERX-700 series

Removing the Fan Tray



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.

To remove the fan tray:

  1. Using a Phillips screwdriver, loosen the two captive screws located at top and bottom of the fan tray.


Warning: Do not place your fingers near the fans when removing the fan tray. The blades may still be moving.

  1. Pull the fan tray halfway out of the shelf.


Warning: Slowly slide the fan tray out of the chassis. The tray has no stops to prevent it from sliding all the way out.

  1. Pull the tray out of the chassis.

Installing the Fan Tray



Caution: Do not use the fan tray handle to carry the fan tray assembly. Use the handle only to push the into the chassis.

To install the fan tray:

  1. Hold the tray vertically so that the captive screws point towards you and you can read text on the labels.
  2. Place the bottom corners of the tray housing in the plastic shelf guides of the fan tray compartment; push toward the back of the chassis halfway, and stop.
  3. Push the fan tray toward the back of the shelf until it stops.

There is an electrical connector on the back of the fan tray that pairs with an electrical connector at the back of the shelf.

  1. With a Phillips screwdriver, tighten the captive screws on the fan tray.

Alternate between screws when tightening them to ensure that the electrical connectors at the back of the tray fit tightly.


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