Safety instructionsBefore working inside your systemInstalling the optional cooling fan assemblyInstalling the optional cooling fan assemblyPrerequisitesCAUTION: Many repairs may only be done by a certified service technician. You should onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat are shipped with your product.CAUTION: Ensure that the cables are correctly installed and retained by cable retention bracketbefore installing the cooling-fan assembly. Incorrectly installed cables may get damaged.Follow the safety guidelines listed in the safety instructions section.Steps1. Align the slots on the cooling fan assembly with the guide pins on the chassis side walls.2. Slide the cooling fan assembly into the chassis.3. Lock the cooling fan assembly into the chassis by pressing the release levers down.Next stepsFollow the procedure listed in the After working inside your system section.Figure 28. Installing the cooling fan assembly1. cooling-fan assembly 2. cooling fan (4)3. release lever (2) 4. slot (6)91