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The maintenance skill of soft starter

1. the soft starter does not start and the fault free code display, possibly because the control power supply is not connected. The solution is to check the power supply of the control power supply and check whether the circuit is connected correctly.

2. when the motor sends out buzzing / no starting signal, the motor starts, which may be due to the possibility of breakdown and damage of SCR / module, electric bonding of bypass contactor, solution check the replacement of SCR / module, and check and correct the cause of accident.

3. during the starting and operation, the motor sounds abnormally, which may be due to the lack of phase of the motor, the motor inside the junction box should be checked.

4. when the motor is shut down, the abnormal sound may be due to the incorrect time of voltage reduction. Different time of reducing voltage is used for the solution (in order to obtain ideal effect, it may be necessary to make multiple adjustments).

5. when hard input start signal is used, the motor cannot start, which may be caused by incorrect control connection, starting and stopping signals being sent at the same time or because the keyboard is in local control menu. The solution should check the link between start and stop, check whether the start and stop signals are sent simultaneously, and then check whether the keyboard is in the local control menu, And also check if the parameter center line control is activated

6. when the starting signal is input by bus communication, the motor does not start, which may be due to the wrong bus parameter setting. The solution should check whether online control has been activated, and also check whether the allowed input is allowed to be used and whether the programmable input is set correctly.