So, unlike the fixed schedule and new grass schedule. ET smart schedule operates by executing irrigation schedules on a zone-by-zone basis, as if each zone has its own customized watering schedule. These irrigation schedules are independent of each other, so it's not necessary to water all zones every time. In fact, it's quite uncommon to water all zones simultaneously. However, if you have the same parameter settings for all zones and still experience variations in their operation, I suggest reaching out to their customer service for assistance.
