Vacon NX Active Front End User Manual

Contents

Receipt of delivery vacon • 1324-hour support +358 (0)201 212 575 • Email: vacon@vacon.com33.5 MaintenanceAll technical devices, drives as well, need a certain amount of care-taking and failure preventivemaintenance. To maintain trouble-free operation of the Vacon ® NX Active Front End,environmental conditions, as well as load, line power, process control, etc. have to be withinspecifications, determined by manufacturer.If all conditions are in accordance with the manufacturer's specifications, there are no otherconcerns, but to provide a cooling capacity high enough for the power- and control circuits. Thisrequirement can be met by making sure, that the cooling system works properly. Operation ofcooling fans and cleanness of the heat sink should be verified regularly.Regular maintenance is recommended to ensure trouble free operation and long lifetime of Vacon®NX Active Front End. At least the following things should be included in the regular maintenance.It is also recommended to record all actions and counter values with dates and time for follow upof maintenance.Table 3. Maintenance intervalInterval Maintenance12 months (if unit is stored) Capacitor reforming, see seperate instructions.6 - 24 months (depending on environment)Check tightening torque of the input and outputterminals and I/O terminals.Clean the cooling tunnel.Check operation of the cooling fan, check forcorrosion on terminals, bus bars and othersurfaces.Check the door filters.5 - 7 yearsChange the cooling fans.Main fan of the unit.Fan of the LCL filter.5 - 10 years Change the DC bus capacitors if DC voltage rippleis high.