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Starting and carrying out descaling (coffee machines)

Starting and carrying out descaling (coffee machines)

Starting the descaling process

Limescale builds up in the coffee machine through use. How often the coffee machine needs to be descaled will depend on the water hardness level in your area. Limescale must be removed regularly. The coffee machine will guide you through the descaling process. Various messages will appear on the display, e.g., you will be prompted to empty the drip tray or fill the water container.

Descaling is mandatory and takes approx. 15–35 minutes, depending on the type of coffee machine. Descaling cannot be canceled once it has started. It must be completed through to the end.

For optimum descaling results, we recommend using the Miele descaling tablets. The descaling tablets have been specially developed for Miele coffee machines.

The descaling tablets are available to order from the Miele online store, from Miele Service, or from your Miele dealer.

The descaling process requires:

  • Built-in coffee machines (CVA xxx): 2 Miele descaling tablets

  • Countertop coffee machines (CM xxx): 1 Miele descaling tablet

Other descaling agents may contain other acids besides citric acid and/or other undesirable ingredients, such as chlorides.

Other acids or undesirable ingredients can damage the coffee machine. Moreover, the descaling result required cannot be guaranteed if the descaling solution was not of the appropriate concentration.

CM 7xxx, CVA 7xxx, CVA 680x (touch display):

  • The Drinks menu is displayed.

  • Touch the  (Maintenance) sensor control.

  • You can scroll left or right using the  arrow sensor controls.

  • Touch Descale the appliance or Descale on the display.

  • If you do not have the  (Maintenance) sensor control, touch the (Back) sensor control.

  • Touch Maintenance on the display.

  • You can scroll left or right using the  arrow sensor controls.

  • Touch Descale the appliance on the display.

CM 5x10, CM 6xxx, CVA 64xx (sensor controls):

  • Touch the  (Maintenance) sensor control.

  • Use the  arrow sensor controls until Descale the appliance or Descale is highlighted.

  • Confirm your selection with OK.

  • If you do not have the  (Maintenance) sensor control, touch the  (Further programs) sensor control or the  (Menus) sensor control.

  • Use the  arrow sensor controls until Maintenance is highlighted.

  • Confirm your selection with OK.

  • Use the  arrow sensor controls until Descale the appliance or Descale is highlighted.

  • Confirm your selection with OK.

CM 5x00 (countertop appliance with selector dial):

  • Press and hold the OK button until MENU appears on the display.

  • Turn the selector dial until MAINTENANCE appears on the display. Press the OK button.

  • Select DESCALE and press the OK button.

  • START DESCALING appears on the display.

  • Press the OK button.

The descaling process has started and cannot be cancelled. It must be completed through to the end.

Preparing the descaling solution

Risk of damage from splashes from the descaling solution.

Sensitive surfaces and/or natural floors can suffer damage.

Wipe up any spillages immediately when descaling.

First fill the water container to the  mark with lukewarm water.
CM 5x00: Fill the water container to the 0.5 L mark with lukewarm water.

Then add the descaling tablet(s) to the water container:

  • Built-in appliances (CVA xxx): 2 Miele descaling tablets

  • Countertop appliances (CM xxxx): 1 Miele descaling tablet

Follow the instructions for the descaling agent mixing ratio carefully.

Otherwise, the descaling process will be incomplete or cancelled prematurely.

Fill the water container with the specified amount of water.

Allow the descaling tablet(s) to dissolve completely.

Carrying out descaling

Push the water container with the descaling solution back into the machine.

Follow the instructions given on the display.

When Fill water container appears on the display – possibly with other instructions – remove the water container and rinse it thoroughly with clean water. Ensure that no descaling solution residue remains in the water container.

Fill the water container up to the  mark with clean drinking water.
If you do not have the  mark, fill the water container up to the max. mark with clean drinking water.

Follow any instructions shown on the display.

After descaling, carefully clean the water container and drip tray to remove all descaling solution residues.

Once the coffee machine has been rinsed, the descaling process is complete. You can now prepare drinks again.

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