6. Have a qualified electrician check the line voltage to ensure that it meets the neededspecifications.Power supply unit problemsProcedure1. 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 workingproperly.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 tosupport the new system.4. If you have a redundant PSU configuration, ensure that both the PSUs are of the same typeand 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 theback.6. Reseat the PSU.Note: After installing a PSU, allow several seconds for the system to recognize the PSUand determine if it is working 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 onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat are shipped with your product.Ensure that the following conditions exist:l System cover, cooling shroud, EMI filler panel, memory module blank, or back filler bracket isnot removed.l Ambient temperature is not higher than the system specific ambient temperature.l External airflow is not obstructed.l A cooling fan is not removed or has not failed.l 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 required or set theminimum fan speed to a custom value.From F2 System Setup:Troubleshooting your systemDell PowerEdge R430 Owner's Manual 207
