Do you have a submersible or external pump?
Is there a float? If so, check that the lead is connected to the RainBank. Also check that the float isn't stuck in a low position.
The pump has to be plugged into the RainBank and the RainBank plugged into the GPO.
Is the power supply turned on? If it is off, the RainBank automatically defaults to mains water.
Thank you for this info. It is very helpful. I don’t know about the pump, but I know the power is switched on (it wasn’t at handover but we switched it on)... I will check everything else and also listen for the pump. Thanks SaveH2O 😊