xvi Overvoltage Inhibit Function (SPEC: E or Later Only) ............................................... 6-1777 Troubleshooting ......................................................................7-1Protective and Diagnostic Functions ............................................................ 7-2 Fault Detection ............................................................................................................... 7-2 Alarm Detection.............................................................................................................. 7-9 Operation Errors........................................................................................................... 7-13 Errors During Autotuning ............................................................................................. 7-15 Errors when Using the Digital Operator Copy Function................................................ 7-16Troubleshooting.......................................................................................... 7-18 If Constant Constants Cannot Be Set........................................................................... 7-18 If the Motor Does Not Operate ..................................................................................... 7-19 If the Direction of the Motor Rotation is Reversed........................................................ 7-21 If the Motor Does Not Put Out Torque or If Acceleration is Slow.................................. 7-21 If the Motor Operates Higher Than the Reference ....................................................... 7-21 If the Slip Compensation Function Has Low Speed Precision ..................................... 7-22 If There is Low Speed Control Accuracy at High-speed Rotation in Open-loop VectorControl Method ............................................................................................................. 7-22 If Motor Deceleration is Slow........................................................................................ 7-22 If the Motor Overheats.................................................................................................. 7-23 If There is Noise When the Inverter is Started or From an AM Radio .......................... 7-24 If the Ground Fault Interrupter Operates When the Inverter is Run ............................. 7-24 If There is Mechanical Oscillation................................................................................. 7-24 If the Torque Generated for the Motor is Insufficient (Insufficient Power)..................... 7-25 If the Motor Rotates Even When Inverter Output is Stopped ....................................... 7-26 If OV is Detected When the Fan is Started, or Fan Stalls............................................. 7-26 If Output Frequency Does Not Rise to Frequency Reference ...................................... 7-268 Maintenance and Inspection ..................................................8-1Maintenance and Inspection ........................................................................ 8-2 Outline of Free Warranty ................................................................................................ 8-2 Daily Inspection .............................................................................................................. 8-2 Periodic Inspection ......................................................................................................... 8-2 Periodic Maintenance of Parts ....................................................................................... 8-3 Procedure for Adjusting Constants after Replacement of Control Board ....................... 8-3 Types and Number of Cooling Fans Used in the Drive .................................................. 8-4 Cooling Fan Replacement Outline ................................................................................. 8-6 Circulation Fan Replacement Outline........................................................................... 8-13 Removing and Mounting the Control Circuit Terminal Board ....................................... 8-16
