1, in the debugging process, there is a phase failure of the starting alarm, the soft starter fault light is on, and the motor does not respond. The cause of the failure may be:
① The power supply is out of phase, and the soft starter protection action. (Check the power supply)
② The output end of the soft starter is not connected to the load. (The soft starter can work normally only after the output is connected to the load)
③ When the starting mode is live, the operation sequence is wrong. (The correct operation sequence should be the main power supply first, then the control power supply)
2, the user in the use of the process of starting, the bypass contactor does not suck phenomenon. The cause of the failure may be:
① Poor contact of the control line. (Check control line)
(2) During the starting process, the protection device misoperates due to the small setting. (Just reset the protection device)
③ During debugging, the parameters of the soft starter are set improperly. (Mainly for the soft starter below 55KW, reset the parameters of the soft starter)
3, the user in the starting process, occasionally appear the phenomenon of jumping air switch. The fault causes are:
① The setting value of the long delay of the air switch is too small or the air switch selection and the motor are not fit. (The parameters of the air switch are enlarged or the air switch is re-selected)
② The starting voltage parameter of the soft starter is set too high or the starting time is too long. (Appropriately reduce the starting voltage or shorten the starting time according to the load)
(3) In the starting process, due to the relatively large voltage fluctuation of the power grid, it is easy to cause the soft starter to issue wrong instructions, and there is an early bypass phenomenon. (It is recommended that users do not start high-power motors at the same time)
④ Start with full load when starting. (Minimize load when starting)
4. When the user uses the soft starter, the display does not display or garbled characters appear, and the soft starter does not work. The cause of the failure may be:
① The soft starter is enabled
Common faults of various soft starters explained: 1. During the commissioning process, the soft starter reports a phase failure fault, the fault light of the soft starter is on, and the motor does not respond. The reason for the failure may be: ① Power phase failure, the soft starter protective action.
② The soft starter control board is faulty. (Contact the manufacturer to replace the control board)
5, the soft starter failure in the starting times, the soft starter does not work, the motor does not respond. The possible causes of the fault are:
① motor lack of phase. (Check motor and peripheral circuits)
② Thyristor short circuit in main component of soft starter. (Check the motor and power grid voltage is abnormal. Contact the manufacturer to replace the thyristor)
③ Filter plate breakdown short circuit. (Replace the filter plate)
6, when the soft starter starts the load, the starting timeout phenomenon occurs. The soft starter stops working and the motor stops freely. The fault causes are:
① Parameter Settings are incorrect. (Re-adjust the parameters, the initial voltage is appropriately increased, and the time is appropriately lengthened)
② Start with full load when starting. (Try to reduce the load when starting)
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