Bad connections may spoil the electronic circuit.
1.Be sure that the pump is correctly primed, and then gently open the tap.
2.Connect the controller to the clectric supply. The tension LED will light (POWER)
3.The pump start working automatically and within a period of 20-25 seconds the pressure gauge will reach approximately the maximum pressure provided by the pump. During its working the corresponding LED(ON) will be on.
4.Close the tap indicate on point 1.After 7-9 seconds the pump will stop. The tension LED(POWER) will be the only one to remain on.
Any problem after this procedure will be due to defective pump priming.