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• If F24 = 1 (only one compressor), the system 2 inputs and outputs are not used and no value is displayed.
5.4 I Advanced operang principles
5.4.1 Operang principles of modes
The appliance has 4 operang modes: Heang, Cooling, Heang/Cooling. The user interface can be used to switch
between these modes (see § "”3.2 I User interface presentaon”) or by modifying the value of the advanced F29
parameter (see § “5.3 I Advanced seng parameters (accessible by a qualied technician)”).
5.4.1.1 Heang mode
In Heang mode, the appliance heats the water when the sensor temperature is lower than the setpoint temperature
reduced by the temperature dierenal. The appliance stops heang the water when the temperature is higher than the
setpoint temperature increased by the temperature dierenal (see following sequences.)
5.4.1.2 Cooling mode
In Cooling mode, the appliance cools the water when the sensor temperature is higher than the setpoint temperature
increased by the temperature dierenal (parameter F15). The appliance stops cooling the water when the temperature
is lower than the setpoint temperature reduced by the temperature dierenal (see following sequences.)