Troubleshooting7- 21 If the Direction of the Motor Rotation is ReversedIf the motor operates in the wrong direction, the motor output wiring is faulty. When the Inverter T1(U),T2(V), and T3(W) are properly connected to the motor T1(U), T2(V), and T3(W), the motor operates in a for-ward direction when a Forward Run Command is executed. The forward direction depends on the manufac-turer and the motor type, so be sure to check the specifications.The direction of rotation can be reversed by switching two wires among T1(U), T2(V), and T3(W). If the Motor Does Not Put Out Torque or If Acceleration is SlowUse the following information if the motor does not output torque or if acceleration is too slow.The torque limit has been reached.When a torque limit has been set in constants L7-01 to L7-04, no torque will be output beyond that limit. Thiscan cause the torque to be insufficient, or the acceleration time to be too long. Check to be sure that the valueset for the torque limit is suitable.If torque limits have been set for the multi-function analog input (H3-09 = 10 to 12 or 15), check tobe sure that the analog input value is suitable.The stall prevention level during acceleration is too low.If the value set for L3-02 (Stall Prevention Level during Acceleration) is too low, the acceleration time will betoo long. Check to be sure that the set value is suitable.The stall prevention level during running is too low.If the value set for L3-06 (Stall Prevention Level during Running) is too low, the speed will drop before out-putting torque. Check to be sure that the set value is suitable.Autotuning has not been performed for vector controlVector control will not be perform if autotuning has not been performed. Perform autotuning separately for themotor, or set the motor constants through calculations. Alternatively, change the Control Method Selection(A1-02) to V/f control (0 or 1). If the Motor Operates Higher Than the ReferenceUse the following information if the motor operates higher than the reference.The analog frequency reference bias setting is wrong (the gain setting is wrong).The frequency reference bias set in constant H3-03 is added to the frequency reference. Check to be sure thatthe set value is suitable.or H3-05
