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Using Inverters for Elevating Machines ....................................................6-169
Brake ON/OFF Sequence...........................................................................................6-169
Stall Prevention during Deceleration...........................................................................6-171
Autotuning...................................................................................................................6-171
Braking Resistor Overheating Protection....................................................................6-171
Momentary Power Loss Restart .................................................................................6-171
Torque Limit ................................................................................................................6-171
I/O Open-phase Protection and Overtorque Detection...............................................6-172
External Baseblock Signal ..........................................................................................6-172
Acceleration/Deceleration Time..................................................................................6-172
Magnetic Contactor on the Inverter’s Output-side ......................................................6-172
Control-related Adjustments .......................................................................................6-173
Reducing Shock during Elevating Machine Start, Stop, Acceleration, and
Deceleration................................................................................................................6-175
Confirming Startup Current and Reducing Carrier Frequency....................................6-178
Overvoltage Inhibit Function (SPEC: E or Later Only)................................................6-179
7
Troubleshooting ..................................................................... 7-1
Protective and Diagnostic Functions ............................................................7-2
Fault Detection................................................................................................................7-2
Alarm Detection ............................................................................................................7-12
Operation Errors ...........................................................................................................7-16
Errors During Autotuning ..............................................................................................7-18
Errors when Using the Digital Operator Copy Function................................................7-19
Troubleshooting ..........................................................................................7-21
If Inverter Constants Cannot Be Set .............................................................................7-21
If the Motor Does Not Operate......................................................................................7-22
If the Direction of the Motor Rotation is Reversed ........................................................7-25
If the Motor Does Not Put Out Torque or If Acceleration is Slow ..................................7-25
If the Motor Operates Higher Than the Reference .......................................................7-25
If the Slip Compensation Function Has Low Speed Precision......................................7-26
If There is Low Speed Control Accuracy at High-speed Rotation in
Open-loop Vector Control Method ................................................................................7-26
If Motor Deceleration is Slow ........................................................................................7-26
If the Motor Overheats ..................................................................................................7-27
If There is Noise When the Inverter is Started or From an AM Radio...........................7-28
If the Ground Fault Interrupter Operates When the Inverter is Run..............................7-28
If There is Mechanical Oscillation .................................................................................7-28
If the Torque Generated for the Motor is Insufficient (Insufficient Power) .....................7-29
If the Motor Rotates Even When Inverter Output is Stopped........................................7-30
If OV is Detected When the Fan is Started, or Fan Stalls .............................................7-30
If Output Frequency Does Not Rise to Frequency Reference ......................................7-30