Troubleshooting with the washing machine display the error code information:
E2: Lock error. Please shut the door properly
E4:
(cause-1)Water level not reached after 12 minutes, at the latest.
Please make sure that tap is fully opened and water pressure is normal.
(cause-2)Drain hose is self-syphoning.
Please check drain hose installation.
For E8 / F3 / F4 / F7 / FC0 / FC1 / FC2 / FA etc: Please contact the after sales service for solution.