CDA vc800 Installation, Use And Maintenance Manual page 38

The coffee maker is now programmed to provide the descale warning
when actually necessary.
Programming Coffee
For instructions on programming coffee, see the "Changing The
Quantity Of Coffee In The Cup" section.
Programming Water
For instructions, see the "Changing The Quantity Of Hot Water"
section.
Descaling
Important: Descaler contains acids. Read and obey the safety
warnings provided by the manufacturer and given on the descaler
pack.
Note: Use the descaler recommended by the manufacturer only. Use
of other descalers invalidates the guarantee. Failure to descale the
appliance as described also invalidates the guarantee.
When "PLEASE DESCALE !" is displayed, the machine requires
descaling. Proceed as follows:
Press the Settings Menu button (B2) to enter the menu then press the
"+" & "-" buttons (B7) and (B8) to select the "DESCALE" function.
Press the "ok" button (B9) and the appliance displays "DESCALE
PLEASE CONFIRM".
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