The dust box is not inserted.
Refit the dust box in the robot vacuum cleaner, making sure it clicks into position.
Fault F3 appears on the robot vacuum cleaner display.
Refit the dust box in the robot vacuum cleaner, making sure it clicks into position.
Check whether the dust box is inserted.
Remove the dust box.
Refit the dust box, making sure it clicks into position.
If necessary, repeat this step several times.
Insert the dust box into the robot vacuum cleaner with an exhaust filter inserted.
The dust box needs to be replaced.
Contact Miele Customer Service.
Contact Miele Customer Service.
If the fault persists, contact the Miele Customer Service Department.