75
FOAM
Not
hot
enough
Check st
eam
boiler pressure
+-1.
1bar
Check t
he
pump speed
(bet
ween 20%
and 35%
)
Check
the EVVS solenoid
valve heat
ing circuit
(coil
heat
ing)
Check
the coil;
it must
be
clogged.
Dose problem
Check t
he
inlet
nozzle
(ref
rigerat
or t
ube)
Check
the milk
time in
seconds
(product
set
tings)
Check pump
rot
at
ion speed,
replace if
necessary
No f
oam
Check
EVALC (hot milk)
or
EVALF (cold
milk)
Check
that
the hot
wat
er valve
is
not
clogged
Check t
he
pump speed in
relat
ion t
o t
he
product
(hot
10-15%
/ cold 50-
70%
Disconnect
the
hot
wat
er
valve,
run a cycl
e, if presence
foam wit
h
spit
tin
g problem
of
air
ent
ry (check
EVALF/EVALC)
Change
the pump
Poor qualit
y f
oam
Check
milk t
emperat
ure
bet
ween 3°C and 8°C
Check t
he
"advanced milk
set
tings" (see
of
adjust
m
ent
sheet
)
Review t
he air set
tings
(flush first)
Check
the t
ight
ness
of
the
ent
ire hydraulic circuit
Change
the pump
Foam t
oo
dense
Check t
he
pump speed in
relat
ion t
o t
he
product
(hot
10-
15%
/ cold 50-
70%
Reduce hot
air if
hot
product
Reduce cold air if
cold product
Foam
not
dense enough
Check t
he
pump speed in
relat
ion t
o t
he
product
(hot
10-
15%
/ cold 50-
70%
In
crease
hot
air if
hot
product
In
crease
cold air if
cold
product
Bubbly
foam or
spit
ting f
rom
the nozzle
Check
the ref
rigerat
or module
circuit
fo
r air leaks
Check
the hot
wat
er non-
ret
urn
valve,
change if
necessary
Check t
he
pump union /
EVNL
Check
the sealing
of
the
hot/cold
air
EVALF/EVALC SV
Cold milk
/
not
cold enough
Check t
he
milk in t
he
ref
rigerat
or (check t
he
calibrat
ion)
Check EVLCF;
it must
be in
operation during
a cold cycle.
If EVLCF
does
not
operat
e
check t
he
presence
of
24
VDC;
if
OK
replace
the
solenoid valve
Foam
system
d
iag
nosis; fo
llow step by step
from the top
to the bottom,
for each element.
