The double flashing of the BOLD light means the drip side of the unit require to be descale. To descale it please follow the steps:

1) Remove the antichlorine filter and pour 100 mL of descaler into the tank;
2) Fill the tank with water up to the “max” level for the correct dilution;
3) Place the carafe on the warming plate;
4) Press and hold the “BOLD” touch icon for at least 6 seconds to start the descaling” cycle.
5) The “descaling” cycle will take about 30 minutes. During the descaling cycle the “BOLD“ led will blink.
6) Rinse at least 3 times by operating the machine with water only