7
ENGLISH
GB
4.6. Safety
Devices
During the running of appliance, some control
devices may activate and govern the correct
running of the machine. In other cases, they may
deactivate parts or the whole machine, to put the
appliance in safe conditions. The main controls
are listed.
Door micro switch
If the door is opened, the magnetic switch placed
on the control board opens and, during blast-
chilling or shock-freezing, evaporator fans go off
and a warning message appears on the display at
the same time. This condition may also be
determined when the door is not perfectly aligned
to or near the control board: in this case with the
machine in the
STOP
phase, no cycle may be
started.
If a U.V. sterilisation cycle is active, the
functioning of the U.V. lamp is interrupted. The
cycle continues when the door is closed.
Protective Fuses
Some protection fuses in the general power
supply line are activated in case of overload.
Other fuses are prepared for the evaporator fans.
Thermal relay
In the case of faulty operation that results in
exceeding the current absorption limits of the
electric system, the thermal relay will operate to
stop the machine. This intervention is shown on
the display by means of the wording “
HA
”. If the
circuit breaker relay has intervened, it must be
restored manually (see specific chapter).
High and low pressure switches
If, due to environmental conditions or faulty
operation, the minimum/maximum pressure
values in the refrigerating circuit should become
excessive, the maximum/minimum safety
pressure switch (in the 5 Pans version, only the
maximum safety pressure switch) will operate to
stop the appliance. The machine can be switched
on again only after the pressure has returned to
an acceptable value. If a high pressure alarm
should occur, the wording
“HP”
will appear on the
display. The wording
“LP”
will appear if there is a
low pressure alarm.
