The sprinkler icon flashes when the controller is outputting power to the station terminal or terminals activating a station (see fig.1). If the icon is blinking with an umbrella on the display (see fig.2), the rain sensor’s circuit has been broken and is not allowing for watering even though scheduled watering should be occurring. If the display is also flashing the word "OFF", the rain sensor is activated. Use the bypass button to eliminate the message and continue watering.
Note: If you see this flashing icon and there is no water, please visit the support article here for more details.
Figure 1 Figure 2