4. SAFETY DEVICES
Shearing prevention system: realised by means of microswitches and safety circuit; it is activated when the door is opened and/or the grid on the hopper is lifted and it brings the machine to a temporary STOP: EME will appear on the display. Do not use this device to stop the machine during batch freezing cycles, but always use the STOP function instead.
Motor reliability of service: realised by means of temperature relays to protect motors against overloads.
In any case the machine carries out a series of tests during production: Production control system
Carried out by the microprocessor through a current transformer. It controls the agitator motor watt.
Batch freezing safety timer
It operates 35 minutes after the beginning of batch freezing in case the consistency minimum value set up by the manufacturer is not reached. The compressor stops, the agitator runs slowly, the STOP pushbutton is lit up, the production pushbutton and the display blink and an intermittent beep is released. In this case check the presence of troubles in the refrigerant circuit and/or check the proportion of the batch.
Lack of growth in consistency
It operates if the batch stops increasing in consistency due to a wrong proportion of ingredients or due to a
Logic unit
It stops the machine allowing the manual reset of the functions.
Logic unit self-diagnosis (watch-dog)
It controls possible internal troubles and stops the card in case of failure.
