Daikin UATYA-B, Operation Manual

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Service manual Daikin R32 Rooftops UATYA-B
ESIE21-02 – 2021.03
3.3 Temperature control
Cooling and heating devices are controlled according to the temperature value measured by a reference probe. The me -
asured temperature is compared with the desired value (setpoint “ST1” for cooling and setpoint “STH1” for heating), after
which the difference between these values is calculated and the most suitable devices are started, based on this difference.
The proportional band identifies the control range of the air conditioner system and it can be set up with independent values
for heating and cooling mode.
The dead zone identifies the range around the setpoint within which the devices are not enabled (it is used to prevent oscil
-
lations in the setup value).
The diagram below shows the behaviour of heating and cooling devices.
STH6 STH4
100
0
%
STH1
SdR °C
STH5
ST5 ST6 ST4
ST1
Fig. 3 Graphical representation of temperature control devices
Parameter Min Max UM Description
ST1 ST2 ST3 °C Mechanical cooling - Temperature setpoint
ST2 11.0 ST3 °C Min. return air temperature setpoint
ST3 ST2 35.0 °C Max. return air temperature setpoint
ST4 0.0 25.0 °C Proportional control - Cooling - Activation differential
ST5 0.0 25.0 °C Proportional control - Cooling - Neutral activation area
ST6 0.0 25.0 °C Proportional control - Cooling - Offset
ST9 0 7 - Control probe
ST11 0 2 - Type of temperature control
PID70 0 10000 - Mechanical cooling - Kp
PID71 0 10000 - Mechanical cooling - Ki
PID72 0 10000 - Mechanical cooling - Kd
PID76 0.0 25.0 °C Mechanical cooling - Dead band
PID78 0 2 - Mechanical cooling - Dead band position
STH1 10.0 35.0 °C
Mechanical heating / Auxiliary heating in winter mode - Temperature
setpoint
STH2 10.0 35.0 °C
Mechanical heating / Auxiliary heating in winter operating - Min. temperature
setpoint
STH3 10.0 35.0 °C
Mechanical heating / Auxiliary heating in winter operating - Max. temperatu -
re setpoint
STH4 0.0 25.0 °C Mechanical heating - Proportional - Activation differential
STH5 0.0 25.0 °C Mechanical heating - Proportional - Activation neutral zone
STH6 0.0 25.0 °C Mechanical heating - Proportional - Offset
STH9 0 1 - Mechanical heating / Auxiliary heating in winter operating - Regulation probe
STH11 0 2 - Mechanical heating - Type of temperature control
STH21 0 10000 - Mechanical heating - PID - Kp
STH22 0 10000 - Mechanical heating - PID - Ki
STH23 0 10000 - Mechanical heating - PID - Kd
STH27 0.0 25.0 °C Mechanical heating - PID - Dead band
STH29 0 2 - Mechanical heating - PID - Dead band position
3 Software functions