Daikin UATYA-B, Руководство по эксплуатации

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Service manual Daikin R32 Rooftops UATYA-B
ESIE21-02 – 2021.03
Temperature control with a PID controller
If the value of parameter “STH11” is set to “2”, temperature is controlled using a PID controller.
The parameters involved are shown in the table.
The values of the parameters are representative. In specific cases, different values can be set.
Parameter Value UM Description
STH21 3000 - Mechanical heating - PID - Kp
STH22 100 - Mechanical heating - PID - Ki
STH23 5 - Mechanical heating - PID - Kd
STH27 0.4 °C Mechanical heating - PID - Dead band
STH29 2 - Mechanical heating - PID - Dead band position
STH38 0 - Mechanical heating - PID - Manual override (0 = Disabled)
STH41 0.0 % Mechanical heating - PID - Min. output
STH42 100.0 % Mechanical heating - PID - Max. output
The use of a PID controller is strongly recommended for delivery temperature control.
3.3.3 Disabling heating sources depending on external air temperature
The value of the external air temperature is used as reference to disable the heating sources in the unit. The heating sour -
ces are disabled when the temperature is either high or low.
The parameters involved are shown in the table.
The values of the parameters are representative. In specific cases, different values can be set.
Parameter Value UM Description
STH14 -20.0 °C Mechanical heating - Deactivation threshold for low external air temperature
STH15 30.0 °C Mechanical heating - Deactivation threshold for high external air temperature
STH123 -30.0 °C Auxiliary heating - Deactivation threshold for low external air temperature
STH124 50.0 °C Auxiliary heating - Deactivation threshold for high external air temperature
Heating generated using the refrigerant circuit is disabled when:
- the external air temperature is low - it drops below the setpoint in parameter “STH14”; heating is enabled again when
the temperature value rises above the setpoint in parameter “STH14”, plus +1°C;
- the external air temperature is high - it rises above the setpoint in parameter “STH15”; heating is enabled again when
the temperature value drops below the setpoint in parameter “STH15”, minus +1°C.
Auxiliary heating is disabled when:
- the external air temperature is low - it drops below the setpoint in parameter “STH123”.Auxiliary heating is enabled
again when the temperature value rises above the setpoint in parameter “STH123”, plus +1°C;
- the external air temperature is high - it rises above the setpoint in parameter “STH124”. Auxiliary heating is enabled
again when the temperature value drops below the setpoint in parameter “STH124”, minus +1°C.
3 Software functions