PS4100 Hardware Maintenance Guide Table of ContentsivAbout Control Module Configurations .................................................................................................................17Interpreting Control Module LEDs.......................................................................................................................18Identifying Control Module Failures ....................................................................................................................19Understanding Failover Behavior .........................................................................................................................19Maintaining Control Module Firmware................................................................................................................20Control Module Handling Requirements ..............................................................................................................20About the Standby On/Off Button ........................................................................................................................21Replacing a Control Module .....................................................................................................................................22Removing a Control Module.................................................................................................................................22Installing a Control Module ..................................................................................................................................23Replacing the MicroSD Card....................................................................................................................................24Removing the MicroSD Card ...............................................................................................................................25Inserting the MicroSD Card ..................................................................................................................................26Advanced Networking Options.................................................................................................................................26Configuring the Management Port........................................................................................................................274 Maintaining Power Supply and Cooling Modules............................................................................... 29About AC Power Supplies ........................................................................................................................................29Power Supply LEDs..................................................................................................................................................29Removing a Power Supply and Cooling Module......................................................................................................30Installing a Power Supply and Cooling Module .......................................................................................................315 Troubleshooting Your Array................................................................................................................. 35Safety First—For You and Your array .....................................................................................................................35Obtaining Technical Support and Customer Service ................................................................................................35Determining Service Tag Information ......................................................................................................................35Obtaining Component Diagnostics ...........................................................................................................................36Troubleshooting Array Startup Failure .....................................................................................................................36Troubleshooting Loss of Communication.................................................................................................................36Troubleshooting Array Connections.........................................................................................................................36