Ok Phien, You have either got one of two things happening here, either the machine has not drained and wont drain causing the machine to default to a error condition or the motor has a problem.
I would check the drain filter to see if it is clogged, you can do this by opening the small door on the front and unscrewing the drain filter, pull it out then check it for debris, clean the drain filter out then try the machine again.
If you still have the same problem your motor is going to have a problem, This is a whole different kettle of fish when repairing since you will need a ohm/volt/amp meter when accurately diagnosing the problem.
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