EN/07.2013/58/64
If anti-freezing control gives a value higher then the adaptive control, the anti-freezing value will be used.
The adaptive control can be done also using the Pc probe instead of Tc. Parameters to use for Pc are: M115 and M116.
If TE is not present, adaptive control is bypassed.
This function is disabled when parameter M158 is set to YES.
4.14. Soft control
The parameters involved are:
• M121 SOFT CONTROL MODE TEMPERATURE SET POINT: pre-set = 45°C
• M122 SOFT CONTROL MODE WAITING TIME: pre-set = 3min
When the compressor is switched on, if TAE > M121, the evaporator fan speed will be under the anti-freezing control for
an interval of time equal to M122.
During this interval, even if TAE < M121, the evaporator fan speed will stay under anti-freezing control until the time is
over.
4.15. Split air unit
The parameter involved are:
• M41 MIN IN-OUT TEMP. DIFF. FOR FREECOOLING: pre-set = 10°C
• M54 COMPRESSOR ENABLE: pre-set = YES
The parameter M54 selects the configuration of the board:
• NO: the unit is configured as “split air” unit which hasn’t the compressor, so the cooling function and all the alarms
tied to the compressor are disabled. The enabled functions of a split air unit are freecooling and heater. In this case
there is only one condition to enable the freecooling and it’s TI-TE > M41. The conditions about humidity are ignored.
So, the humidity switch and the humidity probe are used only for their relative alarms but not for the other functions
tied to compressor. The evaporator fan speed is always at its max value. The disabled alarms are:
– Low, high pressure alarm
– Power failure alarm
– Compressor thermic alarm
– Condenser fan thermic alarm
– Bad working alarm
If the unit is a split air one, the following screen will be displayed.
dd/mm/yy hh:mm
Room temp: xx.x °C
Ext temp: yy.y °C
VENTILATION MODE
• YES: the unit is configured as standard C2020 controller with all its functions.
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