Zanussi CKZ39-BL Mode D'emploi page 41

 Buy a commercial descaling product especially for
descaling espresso machines.
 Dilute the descaling solution with water according to
the manufacturer's instructions. Wait until the
descaling solution is completely dissolved in the
mixture.
 Pour this solution into the water tank, filling it to the
"MAX" mark.
 Connect the appliance to a power outlet.
 Place a large bowl on the drip grid. Insert an empty
adapter (without capsule and without coffee) into the
appliance.
 Press the ON/OFF button.
 Press the large cup button to circulate the descaling
mixture through the appliance's internal circuits. At
the end of the large cup programme flow cycle, repeat
several large cup programme cycles until the mixture
in the water tank runs out.
 Repeat another descaling cycle by filling the water
tank with the mixture for a second time.
 Carry out two internal rinsing cycles of the device with
clean water.
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