Preparing the 9105-41B, 9105-42A, or 9786-42H system to remove and replace a fan

To prepare the system to remove and replace a fan, complete the steps in this procedure.

1. If applicable, open the rack front door.
2. Identify the part and the system that you are working on. For instructions, see Identifying a part.
   Use the blue identify LED on the enclosure to locate the system. Ensure that the serial number of the system matches the serial number to be serviced.
3. For a rack-mounted system, remove the front cover by pulling it away from the system.
   The cover has indentations where you can hold it more easily.
4. For a stand-alone system, remove the front cover and door by completing these steps.
   1. Insert the front door key into the lock. Twist the key to the left (counterclockwise) to unlock the door. Horizontal is locked; vertical is unlocked. Open the front door.

      

   2. Ensure that you have the electrostatic discharge (ESD) wrist strap on and that the ESD clip is plugged into a ground jack or connected to an unpainted metal surface. If not, do so now.
   3. Twist the cover latch to the left (counterclockwise) to unlock the cover. Vertical is locked; horizontal is unlocked.

      

   4. Pull the cover away from the system. The cover has an indentation where you can hold onto it more easily.

      

5. Determine whether the repair operation can continue when the system power is turned on.
   To continue the repair operation when the system power is turned on, the following conditions must be true:

   • The server might have 4 or 6 fans, depending on the number of processors that can be supported. A fan must be installed in the slots as shipped.
     • A system that can support only one processor has fans in locations A0, A1, A2, and A4. The fans in locations A3 and A5 have fillers.
     • A system that can support two processors has fans in locations A0 through A5.
   • Each fan has an amber LED and a green LED. The green LED is lit solid for all fans, but the fan with the failure has the amber fault LED lit.
   • If a single amber fault LED is illuminated, you can complete the repair operation while the system power is turned on.

   

6. Ensure that the amber LED corresponds to the location of the fan with the lit fault LED.
7. If you can complete the procedure with the system power turned on, continue with step 9.
8. If you need to power off the server to complete the repair operation, complete the following steps:
   1. Stop the system. For instructions, see Stopping a system.
   2. Attach the electrostatic discharge (ESD) wrist strap.
      The ESD wrist strap must be connected to an unpainted metal surface until the service procedure is completed, and if applicable, until the service access cover is replaced.

      Attention:

      • Attach an electrostatic discharge (ESD) wrist strap to the front ESD jack, to the rear ESD jack, or to an unpainted metal surface of your hardware to prevent the electrostatic discharge from damaging your hardware.
      • When you use an ESD wrist strap, follow all electrical safety procedures. An ESD wrist strap is used for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
      • If you do not have an ESD wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds. If at any point in this service process you move away from the system, it is important to again discharge yourself by touching an unpainted metal surface for at least 5 seconds before you continue with the service process.
   3. If the system power is turned off, label and disconnect the power cords from the system unit.
      Note: You can use the hook-and-loop fastener to attach the power cords to the system. If you are placing the system in a service position after you disconnect the power cords, ensure that you unstrap the fastener.

      

      (L003)

      

      or

      

      or

      

      or

      

      or

      

      

      

      DANGER

      Multiple power cords. The product might be equipped with multiple AC power cords or multiple DC power cables. To remove all hazardous voltages, disconnect all power cords and power cables. (L003)
9. Attach the electrostatic discharge (ESD) wrist strap. Your system has ESD jacks on the front and on the rear of the system as shown in the following figure. Plug the ESD wrist strap into the ESD jack.
   Attention:

   • Attach an electrostatic discharge (ESD) wrist strap to the front ESD jack, to the rear ESD jack, or to an unpainted metal surface of your hardware to prevent the electrostatic discharge from damaging your hardware.
   • When you use an ESD wrist strap, follow all electrical safety procedures. An ESD wrist strap is used for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
   • If you do not have an ESD wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.