The button has two uses:
a. when changing the multistage filter: the fountain indicates by a flashing light when the filter needs to be changed (every 60 days of actual use). Once the multistage filter has been replaced, keep the button pressed for about 3 seconds to restart the day count
b. to restart the pump after adding water: for safety reasons, it is recommended to do every operation on the device, including the addition of water, with the plug disconnected. The fountain alerts the user by flashing red light, when the water level is no longer sufficient and the pump stops working to save itself. After adding water to the disconnected plug fountain, the device restarts to operate autonomously once the plug has been reconnected. In the event that the addition of water is carried out with the plug connected, to restart the pump, press the button once.