76Installing fansGuidelinesThe fans are hot swappable. If sufficient space is available for installation, you can install fanswithout powering off the server or removing the server from the rack. The following procedure isprovided based on the assumption that no sufficient space is available for replacement.The server provides six fan bays. You must install fans in all fan bays in any of the followingconditions:• Two processors are present.• One processor is present and a UIS-GPU-M60-1 GPU module is installed.In any other conditions, you must install fans in fan bays 3 through 6 and the remaining fan bays canbe empty. If a fan bay is empty, make sure a fan blank is installed. For the locations of fans in theserver, see "Fans."The fans support N+1 redundancy:• If one fan fails, the other fans speed up and the Health LED on the front panel flashes amber at1 Hz to indicate that a general warning was generated.• If two fans fail, the Health LED on the front panel flashes red at 1 Hz to indicate that a severealarm was generated. You need to replace the faulty fans immediately because the server willbe powered off one minute after the severe alarm was generated.During system POST and operation, the server will be powered off if the temperature detected byany sensor in the server reaches the critical threshold.Procedure1. Power off the server. For more information, see "Powering off the server."2. Remove the server from the rack. For more information, see "Removing the server from a rack."3. Remove the access panel. For more information, see "Removing the access panel."4. Install a fan:a. Lift a fan blank to remove it, as shown in Figure 106.Figure 106 Removing a fan blankb. Insert a fan into the slot and push it until it snaps into place, as shown in Figure 107.
