Miele · Professional Troubleshooting Guide
The washer dryer's motor is either physically jammed, preventing the drum from turning, or the tacho generator (which measures motor speed) has become detached.
Click steps to track your progress.
Turn off the washer dryer's power supply.
Open the drum and check for any items that might be jamming it.
Carefully try to rotate the drum by hand to check for obstructions.
Check that the earth connection to the appliance is good and secure.
Reset the appliance by turning off power for 30 seconds and then restoring it.