Patent ID: 8585827

Claim:
A method for descaling a beverage preparation machine automatically under the control of a control unit of the machine, the method comprising: placing a dose of descaling agent in a compartment of the machine and filling a reservoir with a predetermined quantity of water; circulating a first part of the predetermined quantity of water from the reservoir, in a fluid circuit, whereby the descaling agent is dissolved or dispersed progressively by water passing through the compartment to form descaling liquid circulating through heating means, and the first part of the predetermined quantity of water in the reservoir transfers directly from the reservoir to the compartment without tubing; and automatically circulating a second or remaining part of the quantity of water from the reservoir in the fluid circuit through the heating means after the descaling agent has dissolved or dispersed in the compartment to rinse the fluid circuit, and the second part of the predetermined quantity of water in the reservoir transfers directly from the reservoir to the compartment without tubing.