
xv
Confirming Startup Current and Reducing Carrier Frequency....................................6-179
Overvoltage Inhibit Function .......................................................................................6-180
Current Alarm Function ............................................................................6-181
Peak Hold Current Monitoring Function ...................................................6-182
Maintenance Timer Display Function .......................................................6-183
Settings Required to Use Maintenance Timer Display Function.................................6-183
Settings Required After Replacement of Cooling Fan or Electrolytic Capacitor .........6-184
7
Troubleshooting ..................................................................... 7-1
Protective and Diagnostic Functions ............................................................7-2
Fault Detection................................................................................................................7-2
Alarm Detection ............................................................................................................7-15
Operation Errors ...........................................................................................................7-19
Errors During Autotuning .............................................................................................7-21
Errors when Using the Digital Operator Copy Function................................................7-22
Troubleshooting ..........................................................................................7-24
If Constant Constants Cannot Be Set ...........................................................................7-24
If the Motor Does Not Operate......................................................................................7-25
If the Direction of the Motor Rotation is Reversed ........................................................7-28
If the Motor Does Not Put Out Torque or If Acceleration is Slow ..................................7-28
If the Motor Operates Higher Than the Reference .......................................................7-28
If the Slip Compensation Function Has Low Speed Precision......................................7-29
If There is Low Speed Control Accuracy at High-speed Rotation in Open-loop
Vector Control Method ..................................................................................................7-29
If Motor Deceleration is Slow ........................................................................................7-29
If the Motor Overheats ..................................................................................................7-30
If There is Noise When the Inverter is Started or From an AM Radio ..........................7-31
If the Ground Fault Interrupter Operates When the Inverter is Run..............................7-31
If There is Mechanical Oscillation .................................................................................7-31
If the Torque Generated for the Motor is Insufficient (Insufficient Power) .....................7-33
If the Torque Reference (U1-09) at Low Speeds in Open-loop Vector 2 Control is
Large Compared to That at Medium and High Speeds ................................................7-33
If Shock Occurs Near the Speed Estimator Switching Frequency in Open-loop
Vector 2 Control ............................................................................................................7-33
If Torque Ripple Occurs at Very Low Speeds in Open-loop Vector 2 Control ...............7-34
If the Motor Rotates Even When Inverter Output is Stopped........................................7-34
If OV is Detected When the Fan is Started, or Fan Stalls .............................................7-34
If Output Frequency Does Not Rise to Frequency Reference ......................................7-34
Acoustic Noise From the Motor ....................................................................................7-35
8
Maintenance and Inspection.................................................. 8-1
Maintenance and Inspection.........................................................................8-2
Outline of Warranty .........................................................................................................8-2
Daily Inspection ..............................................................................................................8-2