Kessel Aqualift F Mono Instructions De Pose Et D'utilisation page 32

6.2.4 Cleaning the wastewater tank and level sensor
Clean the tank.
Clean the immersion pipe and ensure that there are no foreign bodies in it. Clean any other level sensors fitted.
Re-install the service access cover and immersion pipe. Maximum tightening torque 3 Nm.
6.3 Functional check
See description in the control unit's operating and maintenance instructions.
32 / 100 Lifting station/Installation and operating instructions 010-907