Nespresso EF 451 C 111, Service Manual, Page: 30 / 133

Citiz service manual
30
O P E R A T I O N
5.3 Machine modes
5.3.1 Machine modes of Citiz coffee machines
This table helps to understand the operating modes of a Citiz coffee machine:
Machine mode Enter mode Actions Exit mode
1 Heat up mode
Every time after start
the machine
Heats up thermoblock
to ready temperature
90 °C within 60 s with-
out overshooting target
temperature
2 Self test mode
Every time after start
the machine
Tests:
• NTC short circuit
• NTC connected
• Thermoblock heating
curve
Error handling:
Tracking of the last 5
errors by a ring buffer
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
4a Brewing mode
4b Volume brewing
mode (program-
ming cup size)
• Press and release
lungo or espresso
button (brewing
mode)
• Press and hold lungo
or espresso button
for more than 3 sec
(programming mode)
• Press and release
lungo or espresso
button when
machine was in
brewing mode or
automatic exit given
by the flow meter
• Release lungo or
espresso button
when machine was
in programming
mode
5 Descaling mode
• Start machine, wait
until ready
• Press and hold both
coffee buttons for at
least 3 s
• Regulate tempera-
ture to 65 °C (after
pump was started)
• Stop and start pump
with any coffee
button, no volume
brewing in descaling
mode
• Press and hold both
coffee buttons for at
least 3 s
Note:
When machine is
switched off during any
descaling mode, then it
goes to descaling
mode ready state after
next start.