Machine says malfunction and won't froth milk

If you have a rotarywheel; Press and hold to enter the menu, turn to Maintenance, select Decalcify unit; empty tray as requested, fill up 600ml water in a container. Disolve 3 Descaling tablets in the water, and then fill it in the watertank. Press Maintenance button and you`re off.

If you don`t have a Rotary; Turn off the machine and let it cool down for a while, then push the Rinse/Maintenance button for a few seconds; then you will get the message Empty tray. Fill the solution in the watertank and press button.

It`s important that you use the right amount of water, or else the process will "never" finish.