Troubleshooting..........................................................................................7-17 ‹ Trouble Setting Parameters..........................................................................................7-17 ‹ If the Motor Does Not Operate......................................................................................7-18 ‹ Direction of the Motor Rotation is Reversed.................................................................7-20 ‹ Motor Does Not Produce Torque or Acceleration is Slow.............................................7-20 ‹ Motor Operates Faster than the Frequency Reference................................................7-20 ‹ Slip Compensation Function has Low Speed Precision ...............................................7-21 ‹ Low Speed Control Accuracy at High-Speed Rotation in Open Loop Vector Control Method ...............................................................................7-21 ‹ Motor Deceleration is Too Slow ....................................................................................7-21 ‹ Motor Overheat.............................................................................................................7-22 ‹ Noise is Produced from an AM Radio or when the MxC is Started ..............................7-23 ‹ Ground Fault Interrupter Operates while the MxC is Running......................................7-23 ‹ Mechanical Oscillation..................................................................................................7-23 ‹ Torque Generated for the Motor is Insufficient (Insufficient Power)..............................7-24 ‹ Motor Rotates Even When MxC Output is Stopped......................................................7-24 ‹ OV or OC is Detected when the Fan is Started or Stalls..............................................7-25 ‹ Output Frequency does not Reach the Specified Frequency Reference......................7-25 8 Maintenance and Inspection..................................................
8-1 Maintenance and Inspection.........................................................................8-2 ‹ Limited Warranty.............................................................................................................8-2 ‹ Daily Inspection ..............................................................................................................8-2 ‹ Periodic Inspection .........................................................................................................8-2 ‹ Periodic Maintenance of Parts........................................................................................8-3 ‹ Precautions when Replacing the Control Board.............................................................8-3 ‹ Types and Number of Cooling Fans Used in the MxC....................................................8-3 ‹ How to Replace the Cooling Fan....................................................................................8-4 ‹ How to Remove or Install the Control-Circuit Terminal Board........................................8-9 9 Specifications .........................................................................
9-1 Standard MxC Specifications........................................................................9-2 ‹ Specifications by Model ..................................................................................................9-2 ‹ Common Specifications..................................................................................................9-3 Specifications for Options and Peripheral Devices.......................................9-5 10 Appendix ...............................................................................
10-1 MxC Control Methods.................................................................................10-2 ‹ Control Methods and Features .....................................................................................10-2 ‹ Control Methods and Applications................................................................................10-4 MxC Application Precautions......................................................................10-5 ‹ Selection.......................................................................................................................10-5 ‹ Installation.....................................................................................................................10-7 ‹ Settings.........................................................................................................................10-8 xv