55Chapter 5 Troubleshooting and maintenanceChapter contentsIntroduction ..........................................................................................................................................................56Fault analysis .........................................................................................................................................................57Periodic maintenance ............................................................................................................................................59Calibration ......................................................................................................................................................59Maintenance..........................................................................................................................................................59Replacing the RAS ..........................................................................................................................................59Exporting the current RAS configuration ..................................................................................................59Removing the defective RAS .....................................................................................................................61Installing the replacement RAS .................................................................................................................62Verifying the hardware installation ............................................................................................................62Importing a saved configuration ................................................................................................................62Completing the installation .......................................................................................................................66