Chapter 4 Fault diagnosis
SMSO-2-02.04- 15.07.03 105
Too little, or no foam
System / component Possible cause Remedy
Bean container Old coffee (coffee beans or coffee pow-
der)
Empty the bean container, connection
piece and grinder
Fill with fresh coffee
Grinder
Grinding degree too coarse (outlet time
too short, brewing pressure too low)
Adjust grinding degree (see “Mainte-
nance, Setting the Grinding Degree”)
Grinding degree too fine (outlet time too
long, brewing pressure too high)
Adjust grinding degree (see “Mainte-
nance, Setting the Grinding Degree”)
Rotary-vane type pump Insufficient pump pressure Adjust the pump pressure setting (see
Maintenance, setting pump pressure)
Instant heater Brewing water temperature set too low
or too high
Adjust brewing temperature setting;
optimum temperature: approx
86 – max. 90
o
C at outlet (see pro-
gramming instructions)
Brewing unit
Lower piston dirty (also water entering
brewing cylinder)
clean or replace
Outlet piston (micro filter or baffle in
outlet tube) dirty
clean or replace
Compaction pressure too low (brewing
pressure too low)
Adjust compaction pressure (see pro-
gramming instructions)
too little powder from grinder or from
decaffeinated coffee input (brewing
pressure too low)
Adjust the grinding quantity to correct
quantity, or measure out the correct
amount of powder for decaffeinated cof-
fee input (use a suitable measuring
spoon). (see programming instructions)
Uneven amounts of powder caused by
foreign bodies in the grinder
Clean the grinder and adjust the grinding
quantity setting (see programming in-
structions)
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