if you have more in detail for these questiona. i may be able to help.
You say 排水模式时失灵不运转,
Q1 : What do you mean by "失灵不运转"?
Q2 : Did not drain water? (water pump problem)
Q3 : The machine stand still? then whath appen after?
Q4 : Did the machine timer run until to the end of the perset time cycle? (Timer is fine, water pump is the problem)
Q5 : Did you hear any sound when it is in " 排水模式". if you can hear the sound but water is not moving, In this case,
1 : Water pump" is the problem,
2: Pump propeller not spinning,
3: Motor and pump "coupling" may be broken.