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How To Set Your CUBE 4' To The Appropriate Water Hardness


If you use your CUBE 4' without a filter, you will need to enter the water hardness if it differs from the factory setting (water hardness 4). But since hardly anyone knows what water hardness is coming out of their tap, your CUBE 4' comes with a test strip for this purpose.
Simply dip the test strip supplied into the water, shake it and after about a minute you can read the test result.
In the Settings/Care menu (Tap the on/off button three times) you can then use the controller buttons to select the colour code blue. Then tap the on/off button briefly to switch to the water hardness menu. (The on/off button will flash blue).

The test strip shows one or less red dots. 

The water has a hardness of  1 - 7°

Set the water hardness to 1. 


The test strip shows two red dots.

The water has a hardness of 8 - 14°

Set the water hardness to 2. 


The test strip shows three red dots.

The water has a hardness of  15 -21°

Set the water hardness to 3. 


The test strip shows four or more red dots. 

The water has a hardness of  > 21°

Set the water hardness to 4. 


The CUBE 4' is set at the factory to operate without a filter. If the machine continues to operate in this way, no further settings are required.

How To Insert Your Filter Into Your CUBE 4'

Caution: The machine may only be operated with a CLARIS fresh water filter

The filter may only be used via the filter program - not before! Also, insert it straight and do not overtighten.

In the SETTINGS / CARE menu (press the on/off button three times) Use the - / + controller buttons to select the GREEN colour code and press the On / Off button briefly to switch to the Change Filter menu. (On/Off button will blink GREEN).

When using the machine with a filter, the water tank must be started and the filter changed. and when changing the filter, the water tank must be filled to the maximum mark.

Set the bar of the status LED fully to the right on the + symbol and confirm by pressing the on/off button.

  • Make sure the red filter valve is in the new filter!
  • Take out the water tank.
  • Gently screw the new filter with the installation tool on the end of the measuring spoon into the into the holder in the water tank (see picture).
  • Fill the water tank with fresh, cold, noncarbonated water (not mineral water) (not mineral water) to the maximum mark in the water tank and replace the tank and replace the reservoir. Do not fill with other liquids or carbonated beverages, or the warranty will be void!
  • Insert the hot water funnel (see picture) into the brew position on the right.
  • Move the lever down to the brew position until it clicks.

  • Place a sufficiently large container (≥ 0.3 l) under the hot water funnel
  • Press the cup symbol
  • Wait until no more water comes out of the hot water funnel, then empty the vessel
  • Open the brewing unit by pressing the lever up
  • Remove the hot water funnel

Video: How To Clean Your CUBE 4'