5-2 Troubleshooting 5 Maintenance Operations Notes on Data Setting: Wait 6 seconds or more after changing data and pressing the Enter key to store it. The data may not be set correctly if you operate any key, perform the reset, or disconnect the power supply within 6 seconds. 5-6 Situation Possible cause Remedy Rotation is unstable. • Is the load too varied? • Is the power voltage varied? • Is this situation observed at a specific frequency? • Increase the capacity of both the motor and Inverter. • Reduce the variation. • Finely adjust the output frequency. Motor rotation doesn't match. • Is the maximum frequency setting correct? • Check the V/F pattern according to the motor specifications.
• Check the transmission gear ratio. Data value is abnormal. Does not change with data set. • After changing the data using the Increment/Decrement key, the Enter key was not pressed before the power was turned off. • Input data again and press the Enter key. • Was the power turned off within 6 seconds of changing the data and pressing the Enter key? • Wait 6 seconds or more after changing data and pressing the Enter key. Data would not change. • Frequency would not change. • Can neither operate nor stop. • Is the selection between operator and terminal modes correct? • Check the selections of the setting modes of A001 and A002. Cannot change data. • Is the soft lock activated?
• Is the soft lock (data: 02 and 03) set in soft lock selection b031? • Is it tripped? • Reset the SFT terminal. • Set b031 to 00 or 01. • Turn off the switch. • Reset the trip.