WMF 150 F, User Manual

Page: 46 / 72

46
User Manual WMF 150 F
3.4 Setting the descale indicator
• If the mains water is heavily chlorinated or is too
hard use a water fi lter. The water fi lter increases
the quality of the coffee and you do not have to
descale the device too often.
Scale deposits are left in the heating system when the machine
is used. The amount of scaling depends on the hardness of
the water that is used. The coffee machine is fi tted with a
descale indicator light
[3] , which illuminates when the heating
system has processed a certain quantity of water and has to
be descaled. The machine continues to work so that it can be
descaled when it is not used.
Descale indicator
Position Indicator
lights
Brewing
processes
Hardness
°dKH mmol/l
Soft 512 < 8 < 1,4
Normal* 256 8– 12 1,4 –2,2
Hard 128 > 12 > 2,2
OFF If a water fi lter is used
*Standard setting
If you do not know the hardness of your tap-water, contact
your local water supply company.
Set the machine to your water hardness as follows (refer to the
descale indicator table):
► If it is necessary, switch off the machine [2]
►
Hold the selection button [1].
► Press the on/off switch [2] .
►
Press the selection button [1] until the correct indicator
light [3 & 4] illuminates. (E.g. only the red lamp should il-
luminate for hard water).
► Wait 10 seconds. The setting has been saved.
IMPORTANT
Read the Warranty chapter , page 31
Technical data, page 32
3
2
I
+
1 2
ON
3
4
O
... x
1