First, During the debugging process, the soft starter of the motor reports a phase loss fault, the soft starter fault light is on, and the motor does not respond. What is the reason for the failure? Ikewell, the soft starter manufacturer, will learn with you today.


1. When the starting method is electrified, the operation sequence is wrong.

The correct operation sequence should be to send the main power first, and then send the control power


2. The power supply phase is missing, the soft starter protection action, this needs to check the power supply.



3. The output end of the soft starter is not connected to the load motor. The soft starter can work normally only after the output terminal is connected to the load.


Second, if the new soft starter is debugged and reported that the system lacks phase, what should be paid attention to?


1. If it is a bypass soft starter, it may be that the configured current transformer is not installed.


2. The output end of the soft starter is not connected to the load motor, or the high-power soft starter is connected to a too small power load motor, the soft starter cannot detect the current, and the soft starter also alarms for phase loss.