Replacing a fan
Fans provide for front-to-back airflow to be consistent with other storage system components. The server continues to operate following the failure of a single fan and during the temporary removal of a fan for replacement. A failed fan must be replaced as soon as possible.
The fans are contained within three assemblies, which are located behind the front fascia and are removable from the front of the server. All servers have three fans (one fan per assembly).
The server's cooling airflow enables the system to operate in an ambient temperature range of 10°C to 35°C when mounted in a storage cabinet with associated components required to make up a storage system. The storage system administrator is responsible for ensuring that the ambient temperature within the rack does not exceed the 35°C operating limit.
Procedure
Remove the front fascia (and the fan guard plate), see Bezel removal for more information. The fan assemblies will then be visible.
Identify the fan to be replaced. Fans are labeled on the chassis, and are numbered 1 to 3, with fan 1 on the left and fan 3 on the right.
Disconnect the fan lead from its connector by pressing down on the small retaining clip, as shown next.
Disconnecting the Fan Lead Connector 
Remove the upper fan retention bracket and place it in a safe location. Note that the upper fan retention bracket helps to hold all three fan assemblies in position.
Fan Retention Brackets 
For each fan assembly you are replacing, remove the lower fan retention bracket and place it in a safe location.
Remove the faulty fan assembly, and put the new fan assembly into place. Make sure to:
- Fit the new fan assembly in the same orientation as the old fan assembly (the arrow indicating the direction of airflow must point into the server).
- Align the fan lead and its protective sleeve in the space allotted for it on the bottom right side of the fan assembly mounting area.
- Fit the fan assembly between the left and right mounting guides.
- Gently press the fan assembly back into the chassis
Fan Connector and Protective Sleeve Secure the fan assembly in position by first replacing the lower retention bracket, then replacing the upper retention bracket.
Connect the fan lead into its connector.
Replace the front fascia.