Version 1.2 en
U service manual
17
O P E R A T I O N
4.3
Machine modes
This table helps to understand the operating modes of the U coffee machines:
Machine mode
Enter mode
Actions
Exit mode
1 Heat up mode
Every time after switch-
ing on machine
Heats up thermoblock
to ready temperature
90 °C within 30 sec
without overshooting
target temperature
e.g. switching off
machine
2 Self test mode
Every time after switch-
ing on machine
Tests:
• NTC short circuit
• NTC connected
• Checks if thermo-
block reaches ready
temperature within
2 min after switch on
e.g. switching off
machine
3 Ready mode
• After heat up and self
test mode was ok
• After brewing or
volume brewing
coffee
• After reset mode
• After leaving
descaling mode
Keeps thermoblock
temperature at 90 °C
e.g. switching off
machine
4a Brewing mode
4b Volume brewing
mode (program-
ming cup size)
Brewing mode:
• Press and release
any coffee button
Programming mode:
• Open the slider
• Press and hold any
coffee button for
more than 3 sec
• Press and release
any coffee button
when machine is in
brewing mode or
automatic exit given
by the flowmeter
• Release corre-
sponding coffee
button when
machine is in
programming mode
• Switch off machine
5 Descaling mode
• Switch on machine,
wait until ready
• Press and hold the 3
coffee buttons for at
least 3 sec
• Regulates tempera-
ture to 55 °C (after
pump was started)
• Stops and starts
pump with any coffee
button, no volume
brewing in descaling
mode
• Press and hold the 3
coffee buttons for at
least 3 sec
Note: When machine is
switched off during any
descaling mode, then it
goes to descaling
mode ready state after
next switch on
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