STARBUCKS Sirena User Manual page 23

Problem
The machine does not turn on.
The espresso is too cold.
Milk froth does not form.
Espresso does not brew.
The espresso is dispensed too
fast; the crema does not form.
Espresso is not dispensed,
or dispensed only in drips.
Espresso is dispensed from
the edges.
The machine does not
dispense water after the
tank has been refilled.
Please contact the service center for any faults not covered in the above table, or when the suggested
solutions do not solve the problem.
Possible cause
Machine is not connected to the
power source.
The portafilter is not inserted for pre-
heating (5).
Cold cups.
The steam wand is clogged.
The milk is too warm.
The LEDS 16, 18, 20 and 22 blink
rapidly at the same time.
Too little espresso in the portafilter.
The grind is too coarse.
Espresso is old or not suitable.
No water.
The grind is too fine.
Espresso is packed too tightly in the
portafilter.
Too much espresso in the portafilter.
The hot water/steam knob (6) is open. Close the knob (6) by turning it counter-
The machine has limescale build-up.
The filter in the portafilter is clogged.
Pods not suitable.
The rubber gasket adapter and plastic
support peg is missing.
The portafilter is incorrectly inserted in
the brew unit.
Upper edge of the portafilter is dirty.
The gasket of the brew unit is dirty.
Too much espresso in the portafilter.
Pod is not inserted correctly.
The hot water/steam knob is open.
Solution
Connect the machine to the power
source.
Preheat the portafilter.
Preheat the cups on the warming
plate or warm with hot water.
Ensure the steam wand is clean and
the air hole at the top is clear.
Use cold milk.
Prime the water circuit as described in
section 4.5.
Add espresso (section 5).
Use a finer grind of espresso; make
sure you are using the back pressure
adapter (rubber gasket adapter) for
single and double shots.
Use fresh ground espresso.
Refill tank with water (section 4.4).
Use a coarser grind.
Shake the ground espresso in the
portafilter.
Reduce the quantity of espresso in
the portafilter.
clockwise all the way.
Descale the machine (section 10).
Clean the filter (section 19) and portafilter.
Change type of pod (use only single pods).
Insert the rubber gasket adapter and
plastic support peg (see section 5.1).
Insert the portafilter correctly (section 5).
Clean the rim of the portafilter.
Clean the gasket of the brew unit.
Reduce the quantity of the espresso .
Insert the pod correctly.
Close the hot water/steam knob by
turning it counter-clockwise. Then open
the knob again, by turning it clockwise.