Check the fan and clean the fan cover as necessary For frequency inverter operation, check the minimum frequency/speed and install an external fan as necessary Check the switching frequency for the operating mode of the motor and change the design as necessary (impermissibly frequent switch-on may lead to motor overload) (see catalogue M7000) Check the design and change the required motor power as necessary In case of operation with a brake, check the functioning of the brake Check the ambient conditions and the mounting position with regard to cooling Consult NORD DRIVESYSTEMS