Unic FRIGO ST, Техническая заметка

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74
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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 (c
oil
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 h
ot 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
prese
nce
of
24
VDC;
if OK
replace
the
solenoid valve
"Milk”
system diagno
sis
Follow step
by step from the top
to the botto
m
, for each element.