I built an AUTO-STAR DELTA circuit with a Grease Pump. All my 3 Contactors are 400V coils and the 4th contactor for the grease pump has got a 230V coil. The operation should be as follows: As soon as you you start the panel your grease pump should also start as the its coil is wired under the start button and neutral. The problem is that as soon as I switch the main breaker on the 4th contactor(grease pump) gets energized even before I can press the start button. What might be causing this problem members?