The double flashing steam light means the espresso side of the unit require to be descaled. To descale the unit, please follow these steps:

1) Fill the tank with 100ml of descaler and the rest with water.
2) Press the “Espresso ON/OFF” button to turn the machine on. The integrated light flashes.
3) Make sure the portafilter is not attached and place a bowl under the boiler outlet.
4) Press and hold the steam button for at least 6 sec. This will start the automated Descaling Process.
5) The descaling process will take about 30 minutes to be completed. In the meantime, the descaling button will blink. While the machine starts dispensing water, open once the steam knob 2-3 seconds to discharge a little water
from the frother system.
6) To eliminate residue of solution and scale, rinse the tank well, then fill it again with fresh water (without descaler).
7) Press the and deliver water until the tank is completely empty.
8) Repeat operations 6 and 7 again.