Removing the controller module

You must remove the controller module from the chassis when you replace a component inside the controller module.

Before you begin

Make sure that you label the cables so that you know where they came from.


  1. If you are not already grounded, properly ground yourself.
  2. Unplug the controller module power supplies from the source.
  3. Release the power cable retainers, and then unplug the cables from the power supplies.
  4. Insert your forefinger into the latching mechanism on either side of the controller module, press the lever with your thumb, and gently pull the controller a few inches out of the chassis.
    Note: If you have difficulty removing the controller module, place your index fingers through the finger holes from the inside (by crossing your arms)

    Latching mechanism
  5. Using both hands, grasp the controller module sides and gently pull it out of the chassis and set it on a flat, stable surface.
  6. Turn the thumbscrew on the front of the controller module anti-clockwise and open the controller module cover.

    Controller module cover.
  7. Lift out the air duct cover.