Using the default setting (P. 72 = 1), EMI (electromagnetic interference) radiation and leakage current from the wiring between the VFD68 Drive and the motor is low; however, there is a high level of audible motor noise. As the setting for P. 72 increases (up to P. 72 = 15, frequency = 15 kHz), audible motor noise decreases while EMI radiation and leakage current increases.
If the audible noise from the VFD is too great with P.72 set to 1, increase the setting to 4 and listen to the audible noise. To minimize the EMI radiation, use the smallest number possible for P. 72.