A separate manual for MCT 10 Set-up Software is available.Download the software and the manual fromwww.danfoss.com/BusinessAreas/DrivesSolutions/Software-download/.2.8.2.2 VLT® Harmonics CalculationSoftware MCT 31The MCT 31 harmonic calculation PC tool enables easyestimation of the harmonic distortion in a givenapplication. Both the harmonic distortion of Danfossfrequency converters as well as non-Danfoss frequencyconverters with additional harmonic reduction devices,such as Danfoss AHF filters and 12-18-pulse rectifiers, canbe calculated.MCT 31 can also be downloaded from www.danfoss.com/BusinessAreas/DrivesSolutions/Softwaredownload/.2.8.2.3 Harmonic Calculation Software(HCS)HCS is an advanced version of the harmonic calculationtool. The calculated results are compared to relevantnorms and can be printed afterwards.For more information, see www.danfoss-hcs.com/Default.asp?LEVEL=START2.9 MaintenanceDanfoss frequency converter models up to 90 kW aremaintenance-free. High power frequency converters (ratedat 110 kW or higher) have built-in filter mats, whichrequire periodic cleaning by the operator, depending onthe exposure to dust and contaminants. Maintenanceintervals for the cooling fans (approximately 3 years) andcapacitors (approximately 5 years) are recommended inmost environments.2.9.1 StorageLike all electronic equipment, frequency converters mustbe stored in a dry location. Periodic forming (capacitorcharging) is not necessary during storage.It is recommended to keep the equipment sealed in itspackaging until installation.Product Overview Design Guide36 Danfoss A/S © 09/2014 All rights reserved. MG20N60222
