The top chassis cover protects the system’s internal components and ensures that they are properly cooled. A chassis interlock switch located under the top chassis cover will immediately turn off system power when the top cover is removed.
Set the cover down so that it hangs over the rear of the server by about an inch (25.4 mm) as shown in panel 1 in Top Chassis Cover Intrusion Switch.
Figure 46 Top Chassis Cover Intrusion Switch
Note - If removing the top cover caused an emergency shutdown, you must install the top cover and press the Power On button on the front of the system to restart the system.