Lighting; Water Hardness; Info (Display Information) - Miele CM 7550 Operating Instructions Manual

Settings

Lighting

You have the following options:
– The machine is switched on: set the
brightness.
– The machine is switched off: set the
brightness and set the time the
lighting should switch off.
When the coffee machine is switched
on, it remains lit up for a certain length
of time after the last action. This time
cannot be adjusted.

Water hardness

If a descaling cartridge is not fitted
and you descale the coffee machine
using descaling tablets, the machine
should be set to the local water
hardness. A prompt to descale the
machine will then appear in the
display at the correct time.
Programme the coffee machine to the
water hardness level of your area so
that it functions correctly and does not
get damaged.
Contact your local water supplier to find
out your local water hardness range if
necessary.
If you are using bottled drinking water,
e.g. mineral water, select settings
according to the calcium content. The
calcium content is given on the label of
the bottle in mg/l Ca
2+
Ca /l).
Do not use carbonated water.
60
2+
or ppm (mg
Tip: If you water hardness is >21 °dH
(3.7 mmol/l), we recommend instead to
use bottled drinking water (< 150 mg/
2+
l Ca ). This will mean your coffee
machine will need to be descaled less
often and there will be less impact on
the environment because less descaling
agent will be used.
The machine is programmed ex-works
to hardness level 3.
The machine has four programmable
levels:
°dH mmol/l
0 – 8.4 0 – 1.5
8.4 – 14 1.5 – 2.5
14 – 21 2.5 – 3.7
> 21 > 3.7
* The hardness level shown in the display may
differ from the hardness level in your area. You
must follow the values in the chart to set your
machine to your local hardness level.

Info (display information)

The option allows you to see the
Info
number of portions made for each
drink.
You can also see how many portions
can be dispensed before the brew unit
needs to be degreased (
until ).
To return to the previous display,
touch .
ppm Setting*
(mg/l CaCO )
3
0 – 150 Soft 1
150 – 250 Medium 2
250 – 375 Hard 3
> 375 Very hard
4
No. of drinks