Check the fault code 10 from the maintenance manual, indicating that the water level of the water tank did not drop when the drainage pump was started, so as to judge the fault of the drainage pump. However, in the actual maintenance process, this fault code will also be reported if the water level probe, driving plate or inlet solenoid valve are damaged. You can enter the function test interface to test and check the status of each functional component. If you don't understand, you can leave me a message, hoping to help you.