LS Industrial Systems iG5A - Page 31

2. Troubleshooting
30
The motor stops during acceleration or when connected to load.
Cause
Remedy
The load is too high.
Reduce the load.
Replace the motor and the inverter with models with
capacity appropriate for the load.
The motor does not accelerate. /The acceleration time is too long
Cause
Remedy
The frequency command value is low.
Set an appropriate value.
The load is too high.
Reduce the load and increase the acceleration time.
Check the mechanical brake status.
The acceleration time is too long.
Change the acceleration time.
The combined values of the motor properties
and the inverter parameter are incorrect.
Change the motor related parameters.
The stall prevention level during acceleration
is low.
Change the stall prevention level.
The stall prevention level during operation is
low.
Change the stall prevention level.
Starting torque is insufficient.
Change to vector control operation mode. If the fault is
still not corrected, replace the inverter with a model with
increased capacity.
Motor speed varies during operation.
Cause
Remedy
There is a high variance in load.
Replace the motor and inverter with models with
increased capacity.
The input voltage varies.
Reduce input voltage variation.
Motor speed variations occur at a specific
frequency.
Adjust the output frequency to avoid a resonance area.
The motor rotation is different from the setting.
Cause
Remedy
The V/F pattern is set incorrectly.
Set a V/F pattern that is suitable for the motor
specification.