Dell PowerEdge M420 Hardware Owner's Manual - Page 269

Installing a Power Supply Module 1 Ensure that the power supply module handle is fully open and the power cable is not plugged into the electrical outlet. 2 Slide the power supply module into the enclosure. See Figure 4-2. 3 Rotate the power supply module handle upward until it latches. 4 Plug a power cable into the power supply module. 5 Secure the cable to the power supply with the retention clip by fitting the retention clip over the cable, and fitting the retention clip tether into the notch in the power supply handle. See Figure 4-1. Fan Modules The M1000e enclosure contains nine hot-swappable fan modules. All nine fan modules must be installed at all times to ensure proper cooling. Removing a Fan Module NOTE: After a fan module is removed from the system, replace it immediately. 1 Identify the failed system fan module using the back-panel fan module indicators. See Figure 1-17. 2 Remove the fan module: a Press the fan-module release button. See Figure 4-3. b Slide the fan module out of the enclosure. Installing Enclosure Components 269