Remove clear plastic attached to black tube (slowly)
This will empty water from washing machine.
Once empty - no water coming out from washing machine then open big opener next to tube and remove any objects inside(I found few coins)
Put back clear plastic filler firmly inside as before.
Close big opener next to tube.
Turn machine programe knob to DRAIN.
Start washing machine.
If you've checked the front drainage and all seems OK, pull out wahing machine and check drainage pipe at back is not blocked. Unscrew the drainage pipe from the sink waste and clear out. Also enaure pipe is kept high off floor and is not too long. This will help drainage and prevent pump trying to pump waste water upwards.