The basic method of repairing the sew inverter is faulty.
1. Power supply problem: check whether the power supply of the inverter is normal. Make sure that the power line connected to the drive is energized properly and that there are no interruptions or power failures. Use a voltmeter to check if the supply voltage is within the set range.
2. Control signal problem: check the control signal circuit connected to the inverter. Make sure that the control signal lines are connected correctly and that the signal is transmitted properly. Check whether the output signal of the controller is stable and meets the requirements of the inverter.
3. Interface board or display screen failure: The inverter may have interface board or display board failure. Try replugging the interface board or display cable and making sure that the connection is good. If possible, try replacing the interface board or display to troubleshoot.
4. Restart the inverter: Try to restart the inverter software. Restart the drive by disconnecting the power supply and powering it back on, or by pressing the reset button. Make sure to perform the correct restart procedure and follow the drive's operating manual or technical documentation.
5. Check the main control board and power board: Faults on the main control board and power board may cause the display to not work. Check the connection and status of the MPU and power board. If a problem is found, it may be necessary to replace or repair the plate.