Lenze MC3000 Series - Manual (Page 27)

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If the drive powers up correctly, follow the procedure given below to check the motor
rotation:
1 . Verify that there is a wire jumper between terminals TB-1 and TB-2 on the Main
Control Board . The drive should have this jumper from the factory . If it is not
present, add one, otherwise the drive will not start .
2 . Use the q key to decrease the speed setpoint to the minimum value allowed
(0 .50 Hz if Parameter 10 - MIN FRQ has not been changed) .
3 . Press the START key . The drive should indicate RUN, but if the speed setpoint
is 0 .50 Hz, the motor may not rotate . Press the p key to increase the speed
setpoint until the motor starts to rotate .
4 . If the motor is rotating in the wrong direction, press the STOP key and remove
power from the drive . Wait three minutes for the bus capacitors to discharge,
and swap any two of the motor wires connected to T1, T2, and T3 .
NOTE 1: The drive is phase insensitive with respect to incoming line voltage .
Therefore, to change the motor rotation, the phases must be swapped at
the drive output terminals or at the motor .
NOTE 2: If the drive's display is blank when power is applied, and the drive is equipped
with fans at the bottom of the heatsink, make sure the fans are spinning and
are free of any obstruction . If any of the fans are clogged with debris, it will
cause a blank display when power is applied .