MAKOT MCH-07 Series - Temperature Value Saving in Cooling; Temperature Sensor Damage Monitoring

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3.4.7. Saving the maximum and minimum temperature values during the cooling process.
The controller has a function of saving in its internal memory maximum and minimum
temperature values that occur throughout the controller's entire cycle. This function makes it
possible to check whether the contents of the tank are stored in correct temperature conditions.
At the moment the cooling is switched on, after the programmed delay has elapsed (AA – see
section 3.4.1.), the minimum and maximum temperature values are saved in the controller
memory. The programmable delay time of enabling this function allows the fresh milk to be
pre-cooled and thus does not take into account the maximum temperature when the cooling is
started. The factory setting is 2 hours, however, this time should be selected according to the
actual operating conditions of the controller.
At any time, you can read the currently available maximum and minimum values. This is done
by pressing briefly the S button and selecting the parameter H0 (maximum value) or parameter
L0 (minimum value).
ATTENTION
In the absence of entries of maximum and minimum temperature values in the controller's
memory the symbol --- appears on the display.
Clearing the memory of maximum and minimum temperature values is caused:
− automatically after turning the cooling off and on again; switching off the cooling itself
does not erase the memory, it takes place only after switching it on again,
− in the event of a power supply failure.
3.4.8. Saving the maximum temperature value during the washing process.
The maximum temperature that is present when the controller is not in cooling mode is also
written to the controller's internal memory. Because the washing process must be carried out
with the cooling off, the temperature then present is also the maximum temperature in the
washing process. However, if the washing process is not carried out during inactive cooling,
the stored temperature is the maximum value that occurred at that time.
The deletion of data contained in the memory occurs automatically after starting the cooling
process. In the absence of data saved in the controller's memory after setting the data reading
parameter – HC, the display shows the symbol ---.
3.4.9. Monitoring and signaling of the measuring temperature sensor damage.
If the controller detects damage to the temperature sensor, the unit and the stirrer are switched
off. The letters ACU appear on the display.
ATTENTION
Sensor damage indication also occurs, if the temperature range measured by the controller is
exceeded.