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7 Troubleshooting ......................................................................7-1
Protective and Diagnostic Functions............................................................ 7-2
Fault Detection ............................................................................................................... 7-2
Alarm Detection............................................................................................................ 7-11
Operation Errors........................................................................................................... 7-15
Errors During Autotuning............................................................................................. 7-17
Errors when Using the Digital Operator Copy Function................................................ 7-18
Troubleshooting.......................................................................................... 7-19
If Constant Constants Cannot Be Set........................................................................... 7-19
If the Motor Does Not Operate ..................................................................................... 7-20
If the Direction of the Motor Rotation is Reversed........................................................ 7-22
If the Motor Does Not Put Out Torque or If Acceleration is Slow.................................. 7-22
If the Motor Operates Higher Than the Reference ....................................................... 7-22
If the Slip Compensation Function Has Low Speed Precision ..................................... 7-23
If There is Low Speed Control Accuracy at High-speed Rotation
in Open-loop Vector Control Method ............................................................................ 7-23
If Motor Deceleration is Slow........................................................................................ 7-23
If the Motor Overheats.................................................................................................. 7-24
If There is Noise When the Inverter is Started or From an AM Radio .......................... 7-25
If the Ground Fault Interrupter Operates When the Inverter is Run ............................. 7-25
If There is Mechanical Oscillation................................................................................. 7-25
If the Torque Generated for the Motor is Insufficient (Insufficient Power)..................... 7-27
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 ............................................ 7-27
If Shock Occurs Near the Speed Estimator Switching Frequency
in Open-loop Vector 2 Control (PRG: 102 only) ........................................................ 7-27
If Torque Ripple Occurs at Very Low Speeds in Open-loop Vector 2 Control
(PRG: 102 only) ........................................................................................................ 7-28
If the Motor Rotates Even When Inverter Output is Stopped ....................................... 7-28
If OV is Detected When the Fan is Started, or Fan Stalls............................................. 7-28
If Output Frequency Does Not Rise to Frequency Reference...................................... 7-28
8 Maintenance and Inspection ..................................................8-1
Maintenance and Inspection ........................................................................ 8-2
Outline of 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 .................................................. 8-5
Cooling Fan Replacement Outline ................................................................................. 8-6
Circulation Fan Replacement Outline........................................................................... 8-13
Removing and Mounting the Control Circuit Terminal Board ....................................... 8-16
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