The signal of the flow sensor indicates a null or an unusually low value.
In these cases, two aspects related to the correct installation of the flow sensor should be verified:
- Firstly, the electrical connection should be checked, making sure that the flow sensor is correctly powered. If using connection terminals in the power supply wiring (red and black) and/or in the frequency output (yellow), it should be verified that the wires sheaths have been duly peeled off to ensure electrical continuity.
- Secondly, It should be checked whether the flow sensor has been installed in the opposite direction to the water flow. In the flow sensors, there is a sticker with an arrow indicating the fluid path when passing through it.