Power supply unit problems1. Ensure that no loose connections exist.For example, loose power cables.2. Ensure that the power supply unit (PSU) handle or LED indicates that the PSU is working properly.For more information about PSU indicators, see the Power indicator codes section.3. If you have recently upgraded your system, ensure that the PSU has enough power to support the new system.4. If you have a redundant PSU configuration, ensure that both the PSUs are of the same type and wattage.You may have to upgrade to a higher wattage PSU.5. Ensure that you use only PSUs with the Extended Power Performance (EPP) label on the back.6. Reseat the PSU.NOTE: After installing a PSU, allow several seconds for the system to recognize the PSU and determine if it isworking properly.If the problem persists, see the Getting help section.Troubleshooting cooling problemsCAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting andsimple repairs as authorized in your product documentation, or as directed by the online or telephone service and supportteam. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safetyinstructions that are shipped with your product.Ensure that the following conditions exist:• System cover, cooling shroud, EMI filler panel, or back-filler bracket is not removed.• Ambient temperature is not higher than the specified ambient temperature.• External airflow is not obstructed.• A cooling fan is not removed or has not failed.• The expansion card installation guidelines have been followed.Additional cooling can be added by one of the following methods:From the iDRAC Web GUI:1. Click Hardware → Fans → Setup.2. From the Fan Speed Offset drop-down list, select the cooling level needed or set the minimum fan speed to a custom value.From F2 System Setup:1. Select iDRAC Settings → Thermal, and set a higher fan speed from the fan speed offset or minimum fan speed.From RACADM commands:1. Run the command racadm help system.thermalsettingsFor more information, see the Integrated Dell Remote Access Controller User's Guide at Dell.com/idracmanuals.157
