RECEIPT OF DELIVERY vacon • 1324-hour support +358 (0)201 212 575 • Email: vacon@vacon.com33.4 MaintenanceIn normal conditions, Vacon NX frequency converters are maintenance-free. However, werecommend to keep the converter clean, e.g. by cleaning the heatsink with compressed airwhenever necessary.In IP54 units, the air filters in the door and in the roof should be cleaned or replaced regularly.We also recommended to follow proactive maintenance schedule to ensure the highest possibleutilization rate of the cabinet drive..Table 1. Proactive maintenance scheduleMaintenance interval Maintenance action12 months (if unit stored) • Reform capacitors (see separate instruction)6-24 months(depending on environment)• Check I/O terminals• Check tightness of mains connection• Clean cooling tunnel• Check operation of cooling fan, check for corrosion onterminals, busbars and other surfaces• Check door and roof filters5-7 years • Change cooling fans:- main fan- fan of the LCL filter5-10 years • Change DC bus capacitors if DC voltage ripple is high
