Miele CVA 4066 Operating And Installation Instructions page 56

Frequently asked questions
What if the machine does not switch on, even though the "Switch on at"
timer setting is activated?
Possible fault
The System Lock is activated.
The display messages are difficult to read.
Possible fault
The contrast or brightness of the
displays are too low / high.
Little or no coffee or espresso is dispensed from the main dispenser.
Possible fault
The main dispenser connector cap is
not positioned correctly, see "Guide to
the machine - Interior view).
No milk or milk froth comes out of the main dispenser.
Possible fault
The dispenser is clogged.
The consistency of the milk froth is not unsatisfactory.
Possible fault
– The air intake tube is clogged.
– The air intake tube is faulty.
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Solution
See "Settings - System Lock".
Solution
Adjust the display contrast / brightness.
See "Settings - Display".
Solution
Lubricate the cap with the supplied
silicone grease.
Solution
See "Cleaning and Care".
Solution
– Clean the air intake tube, see
"Cleaning and Care". Any blockages
can be removed by kneading or
blowing through the pipe to remove
any potential blockages.
Never use a sharp object to remove
blockages, this could damage the
parts.
– Remove the air intake tube and
replace it with the supplied spare
part.