Descaling The Coffee Machine - Philips HD7900 Bedienungsanleitung

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6 Press the start button. This will cause the ground funnel chute flap to open,
allowing you to clean the chute with a brush.
7 Use a brush to remove any coffee grounds or residue that may have
accumulated in the chute.
8 After cleaning the chute, press the start button again to close the flap.

Descaling the coffee machine

Descale the coffee machine when you notice there is a descaling alert appeared
on the display. Only use white vinegar to descale, as other products may cause
damage to the coffee machine.
Warning: Never use vinegar with an acetic acid content of 8 % or
more, natural vinegar, powder descalers or tablet descalers to
descale the machine, as this may cause damage.