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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 in 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 cancelled 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.

Miele descaling tablets are available to order via the Miele online shop, from Miele Customer 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, which may contain other acids besides citric acid and/or other undesirable substances, such as chlorides, could cause damage.

Other acids or undesirable substances 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 sensors.

  • 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 in the display.

  • You can scroll left or right using the  arrow sensors.

  • Touch Descale the appliance on the display.

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

  • Touch the  (Maintenance) sensor control.

  • Use the arrow sensors  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 programmes) sensor control or the  (Menus) sensor control.

  • Use the arrow sensors  until Maintenance is highlighted.

  • Confirm your selection with OK.

  • Use the arrow sensors  until Descale the appliance or Descale is highlighted.

  • Confirm your selection with OK.

CM 5x00 (countertop coffee machine with rotary control):

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

  • Turn the rotary control 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 spilt descaling solution.

Sensitive surfaces and/or natural floors can suffer damage.

Wipe up any spillages of descaling agent immediately.

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 coffee machines (CVA xxx): 2 Miele descaling tablets

  • Countertop coffee machines (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 in 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. marker with clean drinking water.

If necessary, follow the instructions in 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 make drinks again.

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