Maintenance 11311MaintenanceContents of this chapterThis chapter contains preventive maintenance instructions.Maintenance intervalsThe table below shows the maintenance tasks which can be done by the end user. Thecomplete maintenance schedule is available on the Internet. Preventive maintenance interval tableYears from start-upComponent 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21CoolingInternal cabinet cooling fans * (R) R(R)(R) R(R)(R) R(R)(R)IP54 roof fans * (R) R(R)(R) R(R)(R) R(R)(R)Module cooling fans * R R RAgingDC circuit electrolytic capacitorsand discharging resistors *, 1)R RControl panel battery, BCU controlunit batteriesR R RConnections and environmentIP54 air filters in the cabinet doorand roofR R R R R R R R R R R R R R R R R R R R RIP22 and IP42 air inlet (door)meshes(I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I)Tightness of terminals (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I)Dustiness, corrosion andtemperature(I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I)Cabinet heat sink cleaning (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I)
