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Operation
Service Manual C91 / D91
en
Version 1.0
Coffee machine status
After pressing the On/Off button, an automatic
self test is performed to check if
the NTC is connected,
the NTC is short circuited,
the thermoblock reaches the standby
temperature within 2 minutes in brewing
mode.
A detected failure is indicated by the back
lighted coffee button as well as the operating
modes listed in the following table.
(
1
H
z
)
Operating mode
Coffee button
LED signal
Off
off
Heat up (coffee)
blinking slow
Ready
on
System too hot
blinking fast
Brew coffee / rinse
blinking slow
Heat up (descaling)
blinking fast
Descaling ready
blinking fast
Pump on (while descaling)
blinking fast
Emptying water system
blinking fast
Failure
blinking three times fast
