74
♦ Troubleshooting
MILK
Not hot enough
Check steam boiler pressure
+-1.1bar
Check the speed of the
pump (between 20% and
35%)
Check the EVVS solenoid
valve heating circuit (coil
heating)
Check the coil; it is probably
clogged. Replace if
necessary
Dose problem
Check the inlet nozzle
(refrigerator tube)
Check for pinching /
positioning of the tube in the
refrigerator
Check the milk time in
seconds (product settings)
Check pump rotation speed,
replace if needed
Bubble at the nozzle or
spitting
Check the refrigerator
module circuit for air leaks
Check the hot water non-
return valve, change if
necessary
Check the pump union /
EVNL sealing
Check the sealing of the
hot/cold air EVALF/EVALC
SV
Cold milk / not cold
enough
Check the milk
temperature in the
refrigerator
Check the EVLCF; it must be
in operation during a cold
cycle.
If EVLCF does not operate
check the presence of 24
VDC; if OK replace the
solenoid valve
"Milk” system diagnosis
Follow step by step from the top
to the bottom
for each element.
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