Make a permanent jumper wire to bypass faulty flow switch. Flow switch is not necessary for this open loop system, per Enertech Tech Support. The water flow switch was faulty causing the unit to go into lockout within a minute after starting. I proved water flow through the unit and normal refrigerant pressures. I called Enertech Tech Support to help me confirm faulty flow switch. I was advised to make a permanent jumper wire and attach it to fs1 & fs2. Since this unit is open loop Tech Support told me the switch was not necessary. I jumped the terminals and the unit began operating. Unit operating normal.