WMF Lumero Gebrauchsanweisung Seite 16

Descaling
The descaling programme helps maintain the machine, and must be started when the 1-cup button
flashes alternately in blue and white at the latest. Depending on the level of limescale, it can take
up to 90 minutes.
We recommend using a descaler suitable for espresso machines. Follow the manufacturer's safety
instructions, especially those with regard to what to do in the event of contact with the eyes and skin.
Proceed as follows to start the descaling programme:
1. Prepare the descaler in accordance with the manufacturer's instructions, add to the water tank and
fill with approx. 750 ml drinking water. Place the tank in the device.
2. Place a receptacle with a capacity of at least 1 litre underneath the spouts.
3. Insert the portafilter holder without the portafilter.
4. Switch on the device.
5. Wait until the device is in standby mode.
6. Press and hold the 1 and 2-cup buttons ->
Release both buttons – this starts the descaling programme.
7. The descaling programme exits automatically, the machine switches back to standby mode and the
descaler alarm is reset.
Note:
Even if there is no descaling solution left in the tank, the machine still runs a few more pump cycles.
Do not add more liquid to the tank or cancel the descaling programme by operating the mains switch.
If the descaling programme is terminated prematurely, the descaler alarm is not reset!
If this happens, restart the descaling programme (step 6) without adding more liquid.
Allow 3–4 cups of water to run through before making another espresso in order to remove any
remaining descaler from the system.
30
until the 1-cup button lights up in blue.
Malfunctions
Problem Cause
No espresso comes out of the Tank empty.
machine.
The spouts on the
portafilter holder are blocked.
There is limescale in the water
circuit.
The portafilter is blocked
or there is too much coffee
powder in the portafilter.
The water tank has not been
properly
inserted and the valve on the
base of the tank is not open.
There is limescale in the water
circuit.
The light ring on the knob is The device needs to heat up,
red. but the knob is not switched to
position 0.
Device is preheated and should
generate steam, but the
temperature has not yet been
reached.
Hot water output for 60
seconds.
Steam output for 60 seconds.
The espresso drips over the The portafilter holder is not
edges of the portafilter holder properly inserted.
instead of out of the spouts.
The portafilter holder seal has
lost elasticity or is dirty.
The spouts on the portafilter
holder are blocked.
Corrective action
Fill the water tank.
Clean the holes of the portafil-
ter holder.
Clean the holes,
see "Cleaning the coffee
portafilters".
Check that the water tank is
properly inserted. Press down
lightly if necessary.
Descale as described in the
"Descaling" section
Turn the knob to position 0.
Wait until the light ring goes
white and move the knob to
the steam generation position.
Turn the knob to position 0.
Turn the knob to preheat steam
position.
Clean the portafilter holder and
insert it properly.
Have the portafilter holder seal
replaced at a customer service
centre or clean it as described
in the "Cleaning the portafilter
holder" section.
Clean the holes,
see "Cleaning the coffee
portafilters".
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