Extended power outage has occurred that has drained battery. Short power outage has occured but battery is dead. Replace battery and reprogram controller. Replace battery and reprogram controller. Rain sensor does not suspend irrigation.
Rain sensor is defective or miswired.
Verify operation of sensor and proper wiring. Unplug transformer, remove battery, wait several seconds, re-power and reprogram controller. Automatic irrigation does not start at start time and controller is not in the System Off mode. Set up the correct start time. Valve will not turn on.