If the sensor detects an error, it indicates this with a light signal. First all LEDs flash, followed by a single flashing LED and then alternately. The individually flashing LED indicates the corresponding error.
Information on which error has been detected and a recommendation on how to remedy it can be found in the operating instructions for the pump under "Troubleshooting".
Information on which error has been detected and a recommendation on how to remedy it can be found in the operating instructions for the pump under "Troubleshooting".