The robot cannot dock.

Causes for Docking Failure:
1. The dock/base is powered off or moved. Power it on and put it back.
2. There are some obstacles around the dock/base. Clear the obstacles.
3. Your robot is trapped while cleaning. Place it onto the dock/base.
4. The dock/base is NOT on a flat surface. Put it on a flat surface.
5. System error. Place the robot 1 meter in front of the dock/base, and tap the "Recall" button. If the robot cannot return to the dock/base, please contact customer service.