Troubleshooting Your System 123NOTICE: You can hot-plug the power supplies. One power supply must be installed for the system to operate. Thesystem is in the redundant mode when two power supplies are installed. Remove and install only one power supplyat a time in a system that is powered on. Operating the system for extended periods of time with only one powersupply installed and without a power supply blank installed can cause the system to overheat.3 Ensure that the power supply is properly installed by removing and reinstalling it. See "Power Supplies"on page 62.NOTE: After installing a power supply, allow several seconds for the system to recognize the power supplyand to determine if it is working properly. The power indicator turns green to signify that the power supply isfunctioning properly. See "Power Indicator Codes" on page 17.4 Check the indicators to see if the problem is resolved. If not, remove the faulty power supply. See"Removing a Power Supply" on page 62.5 Install a new power supply. See "Installing a Power Supply" on page 63.If the problem persists, see "Getting Help" on page 147.Troubleshooting System Cooling ProblemsProblem• Systems management software issues a fan-related error message.ActionEnsure that none of the following conditions exist:• System cover, cooling shroud, drive blank, or front or back filler panel is removed.• Ambient temperature is too high.• External airflow is obstructed.• Cables inside the system obstruct airflow.• An individual cooling fan is removed or has failed. See "Troubleshooting a Fan" on page 123.Troubleshooting a FanProblem• System-status indicator is amber.• Systems management software issues a fan-related error message.• Front panel LCD indicates a problem with the fan.
