134 Maintenance Descriptions of symbols Recommended annual maintenance actions by the userABB recommends these annual inspections to ensure the highest reliability andoptimum performance. Recommended maintenance intervals after start-upHeatsinkThe module heatsink fins pick up dust from the cooling air. The drive runs intoovertemperature warnings and faults if the heatsink is not clean. When necessary,clean the heatsink as follows.WARNING! Obey the safety instructions, page 14. Ignoring the instructionscan cause physical injury or death, or damage to the equipment.Action DescriptionI Visual inspection and maintenance action if neededP Performance of on/off-site work (commissioning, tests, measurements or otherwork)R Replacement of componentAction TargetP Quality of supply voltageI Spare partsP DC circuit capacitor reforming, spare modules and spare capacitorsI Tightness of terminalsI Dustiness, corrosion or temperatureI Heat sink cleaningComponent Years from start-up3 6 9 12 15 18 20 21CoolingMain cooling fan (frames R1 to R9) R RAuxiliary cooling fan for circuit boards (framesR1 to R9)R RAuxiliary cooling fan IP55 (frames R8 and R9) R RAgingBattery for control panel and ZCU control unit R R4FPS10000239703
