Fan

Use this procedure to service the fan.

1. Place into service position

   Note to expansion unit users: The instructions in this procedure are written based on the rack model. Expansion unit users can still use this procedure; however, expansion unit users should ignore specific references to rack-only features such as rack doors, rack thumbscrews, and rack-specific FRU orientation. Attention: When placing the model rack into the service position, it is essential that all stability plates are firmly in position to prevent the rack from toppling. Ensure that only one system unit is in the service position at a time. Remove two screws (A) securing the system unit (B) to the rack.

2. Place into service position (continued)

   While holding the system unit release latches (A) down on both the left and right sides, pull the system unit (B) out from the rack until the rails are fully extended and locked. Notes: Ensure that the cables at the back of the system unit do not catch or bind as you pull the unit forward in the rack. When the system unit rails are fully extended, the rail safety latches lock into place. This action prevents the system from being pulled out too far.

3. Remove the service access cover

   Loosen the two thumbscrews (A) located at the back of the cover. Slide the cover (B) toward the back of the system unit. When the front of the service access cover has cleared the upper frame ledge, lift the cover up and off the system unit. Attention: For proper cooling and airflow, replace the cover before turning on the system. Operating the system without the cover for more than 30 minutes could damage the system components.

4. Determine if the repair can continue concurrently

   You must determine if the repair can continue concurrently. To continue the repair concurrently, the following conditions must be true: Air moving devices (AMDs) must already be installed at the other locations. Each of these AMD units has a green LED and an amber LED. The LEDs (A) must be set as follows: Green - on Amber - off If any of the conditions are not true, the repair can continue only after powering off the unit containing the FRU that is being repaired. If the unit is already powered off, you may proceed with a nonconcurrent repair.

5. Select an action
   Nonconcurrent repair. Power off the unit and continue the repair.	Concurrent repair. Continue the repair with unit power on.	Delay the repair.
   ↓	Go to step 8.	This ends the procedure.

6. Power off the unit

   Power should be removed from the unit containing the fan. If this unit is powered on, power it off now.

7. Disconnect the power cords

   Disconnect all power cords from the unit you are servicing.

8. Remove the fan

   Locate the failing system fan to be replaced. While squeezing the latch (A), reach through the hole of the failing fan and pull the fan out of the fan cage.

9. Install the fan

   Lower the fan into its location in the fan cage. Push down on the fan until it locks into place.

10. Install the service access cover

    Place the service access cover (A) on the top of the system, about 25 mm (1 in.) from the front of the system. Hold the service access cover against the system unit and slide it toward the front of the system. The tabs of the service access cover slide beneath the upper chassis ledge. Align the two thumbscrews (B) located on the back of the service access cover with the two holes on the back of the system chassis. Tighten the thumbscrews to secure the service access cover.

11. Place into operating position

    To unlock the rail safety latches (B), slide the latches towards the front of the system. Push the system unit (A) back into the rack until both system-unit release latches have locked into position. Note: Ensure that the cables at the back of the system do not catch or bind as you push the system unit back into the rack.

12. Place into operating position (continued)

    Replace and tighten the two screws (B) that secure the system unit (A) to the rack.

13. Connect the power cords

    If you removed the power cords, connect all power cords to the unit you are servicing.

14. Go to Verifying a repair .