18Hot water is run off from the cappuccino frother into the container below and the appliance displays:RINSING• When the water tank is empty, the appliance displays the message:RINSING COMPLETED TURN KNOB• Turn the steam knob clockwise as far as it will go (fig. 4) and refill the water tank with clean water.• The descale program is now complete and the appliance is ready to make coffee again.NOTE: if the descaling cycle is interrupted before completion, the appliance continues to display the descalemessage and the program must be started again from the beginning.IMPORTANT: : FAILURE TO DESCALE THE APPLIANCE REGULARLY INVALIDATES THE GUARANTEE.12.4 Changing coffee temperatureTo change the temperature of the coffee, proceed as follows:• Press the button (the light over the button comes on) then press the button repeatedly untilthe appliance displays:TEMP. WARM• Press the button until the appliance displays the desired coffee temperature• Press the button to confirm the temperature selected;• Press the button to exit programming mode or to change other parameters.12.5 Changing the length of time the appliance remains onThe appliance is factory preset to go off automatically one hour after the last coffee has been made.The number of hours the appliance remains on can be increased as follows:• Press the button (the light over the button comes on) then press the button repeatedly untilthe appliance displays:OFF AFTER 1 HOUR• Press the button to change the number of hours the appliance remains on• Press the button to confirm the value;• Press the button to exit programming mode or to change other parameters.12.6 Setting water hardnessThe descale message is displayed after the appliance has been operated for a factory set period of time cal-culated on the basis of the maximum quantity of lime scale which may be contained in the water used. Ifnecessary, this period of operation can be extended, making descaling less frequent, by programming theappliance based on the actual lime content in the water used. Proceed as follows:• Remove the "Total Hardness Test" strip (enclosed on page 2) from its packaging then dip it fully in thewater tank for a few seconds, Remove it and wait about 30 seconds (until it changes color and a num-ber of red dots are formed);• Turn the appliance on by pressing the button (fig. 6).• Press the button then press the button repeatedly until the appliance displays:WATER HARDNESS 4