Bosch TCA640 Series Repair Instruction page 14

3.5.3 Water hardness
Determine the water hardness with the enclosed test strip or ask your
local water supplier.
Test strip for determining the water hardness, mat. no.: 05 6317
3.5.3.1 Setting the water hardness
►
Press button P, number for hardness range flashes.
►
Select required water hardness with the arrow buttons.
►
Press button P to save the setting.
►
Press exit button to return to brewing mode.
The appliance is ready for use again.
58300000120060_ARA_en_c.doc – 18.09.09
Hardness 1 220 litres
Hardness 2 100 litres
Hardness 3 70 litres
Hardness 4 40 litres
►
The appliance must be switched
on and ready to use.
►
To change the water hardness
setting, press and hold down
button P for at least 3 seconds.
►
Select HARDNESS
with the arrow buttons.
3.5.3.2 Degrees of water hardness
Setting
1
2
3
4
WATER
German
1–7
8–15
16–23
24–30
Note:
It is important for the descaling programme that the
water hardness is set correctly. If external water
softeners are used in the domestic water system or
if filtered water is used, select HARDNESS
WATER 1
French
1–13
14–27
28–42
43–54
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