What does the double flashing of the BOLD light mean on my COM530 and COM532 combination unit?

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 anti chlorine filter and pour 100 mL (3.3 oz)  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) With the unit plugged in but the turned OFF, press and hold the “BOLD” touch icon for at least 6 seconds to start the descaling” cycle.
5) During the descaling cycle the “BOLD“ led will blink. The clock will switch to a countdown (27 min) during the process and will blink until the end of descaling.
6) Rinse at least 3 times by operating the machine with water only