The machine only recirculates the first few litres of water while it mixes the detergent. It then fills the bowl to the selected level. After the short fill at beginning, the machine will rotate the bowl & the drain pump will run to pump the water up into the bowl via the recirculating hose. No water should be escaping out of the drain hose in to the sink waste at this time. If it is then the diverter valve is either partially obstructed & needs to be removed & cleaned out or faulty & should be replaced. If it is working ok & drain hose is dry then Read the user book on setting rinse options for saving water. You don't need to check voltage to diverter. It is either working or not. These diverter solenoids have been known to blow the control boards on many occasion so I would not recommend you test that way. If after all that you are still sure that the machine should be using less, then I suggest that you ask F&P to send someone out to set up & check everything.
Lincoln Appliance NZ, August 2009