46 | Removing and Replacing Componentsw w w . d e l l . c o m | s u p p o r t . d e l l . c o m Figure 10-1. E300 Fan TrayTo remove and replace the fan tray:Removing and Replacing Power ModuleIf you are operating your E300 chassis with a redundant AC Power Supply, you can install, remove, orreplace a power supply without affecting system operation. If you are operating your E300 system withonly three Power Supplies (the minimum), you must completely power off the system to replace a powersupply.NOTE: If there is a power module failure (the Status LED is not lit, major alarm LED is lit, and audible alarmsounds from the RPM), the entire unit must be replaced. There are no field serviceable parts inside the unit.CAUTION: The power supply cord is used as the mains disconnect device, ensure that the socket-outlet islocated/installed near the equipment and is easily accessible so that the plug can be disengaged.Step Task1 Unscrew the retaining screws at the top and bottom of the fan tray.2 Grip the handle and pull the fan tray out approximately one inch from the chassis. Wait 30 seconds, until the fanblades stop rotating, then completely remove the fan tray.3 Insert the fan tray into the chassis. Guide the tray firmly into the slot until it stops and the handle end is flush withthe chassis.4 Secure the fan tray into place by tightening the screws, at the top and bottom of the fan tray, using a #2 Phillipsscrewdriver.R0R1012345FanStatusCC-E300-FANfn00131aStatus LEDHandle