Daikin UATYA-B User manual

Operaon manual
Daikin R32 Rooops UATYA-B
ESIE21-02

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Service manual Daikin R32 Rooops UATYA-B
ESIE21-02 – 2021.03
Disclaimer
Disclaimer
The present publication is drawn up by way of information only and does not constitute an o󰀨er binding upon Daikin Europe
N.V.. Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied
warranty is given for the completeness, accuracy, reliability or tness for particular purpose of its content and the products
and services presented therein. Specications are subject to change without prior notice. Daikin Europe N.V. explicitly
rejects any liability for any direct or indirect damage, in the broadest sense, arising from or related to the use and/or inter-
pretation of this publication. All content is copyrighted by Daikinv Europe N.V.

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Service manualDaikin R32 Rooops UATYA-B
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Version log
Version log
Version code Description Date
ESIE21-02 Document release March 2021

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Service manual Daikin R32 Rooops UATYA-B
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Contents
1 Introduction 9
1.1 General 9
1.1.1 c.pCO controller functions 9
2 The screens 10
2.1 Screen tree 10
2.1.1 Screen menu 11
3 Software functions 12
3.1 Introduction 12
3.2 Set point management 13
3.2.1 Dynamic Set Point 13
3.2.2 Dynamic setpoint from external air probe in cooling mode 14
3.2.3 Dynamic setpoint from external air probe in heating mode 15
3.3 Temperature control 16
3.3.1 Thermoregulation in cooling mode 17
3.3.2 Thermoregulation in heating mode 20
3.3.3 Disabling heating sources depending on external air temperature 22
3.3.4 Pre-heating coil 23
3.4 humidity control 24
3.4.1 Relative humidity control with proportional control 25
3.4.2 Relative humidity control with PID control 26
3.4.3 Absolute humidity control with proportional control 26
3.4.4 Absolute humidity control with PID control 27
3.5 Air humidication 28
3.5.1 Ancillarybuilt-inhumidierfunctions 28
3.6 Air dehumidication 29
3.6.1 Coolinglimitationindehumidicationcycle 29
3.7 Priority between temperature and humidity control 30
3.8 Tips for PID controller setup 31
3.9 Room ventilation 32
3.9.1 Ventilation in delivery line 32
3.9.2 Constantowventilationcontrol 33
3.9.3 Variableowventilationcontrol 34
3.9.4 Ventilation control at constant pressure 36
3.9.5 Ventilationcontrolwithconstantpressuredierence 35
3.9.6 Min. and max. temperature limitation in delivery line 39
3.9.7 Special conditions 40
3.9.8 Ventilation in return line 41
3.9.9 Constantowventilationcontrol 42
3.9.10 Ventilation control at constant pressure 43
3.9.11 Ventilationcontrolwithconstantpressuredierence 44
3.9.12 Ventilation control based on a percentage of the delivery value 46
3.9.13 Special conditions 46
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3.10 Power supply control 47
3.10.1 Phase sequence 47
3.10.2 Min. / Max. voltage 47
3.10.3 Fast Restart 47
3.11 Circuits and compressors 49
3.11.1 Starting and stopping of the compressors 49
3.11.2 Management of compressor with inverter 50
3.11.3 Capacity reduction override 52
3.12 Circuits and compressors - Functions 55
3.12.1 Oil return for compressors managed with inverter 55
3.13 Damper management 56
3.13.1 Damper control 58
3.13.2 Damper management 58
3.13.3 Unit start-up 58
3.13.4 Washing 58
3.13.5 Recirculation 59
3.13.6 Free cooling 59
3.13.7 Free heating 61
3.13.8 Enthalpy-based free cooling and free heating 63
3.13.9 Air change in the room 64
3.13.10 Co2control 64
3.13.11 VOC control 65
3.14 Limitation of damper operation 66
3.14.1 Limitation based on condensing pressure in heating mode 66
3.14.2 Limitation based on evaporating pressure in cooling mode 68
3.14.3 Limitation based on evaporating pressure in heating mode 68
3.14.4 Limitation based on condensing pressure in heating mode 69
3.14.5 Min. opening in relation to external air temperature 70
3.14.6 Min.openinginconnectionwithdehumidication 70
3.14.7 Management of external air damper during defrosting 70
3.15 Source-side ventilation 71
3.15.1 Condensation control 71
3.15.2 Night Shift System function 73
3.15.3 Evaporation control 74
3.16 Auxiliary heating 76
3.16.1 Controlled devices 77
3.16.2 Post heating 78
3.16.3 Single source for winter heating 78
3.16.4 Auxiliary heating and heating by refrigerant circuit 76
3.16.5 Auxiliary heating in both winter and summer operation 78
3.17 Defrosting 79
3.17.1 Simultaneous or separate defrost 80
3.17.2 Checkofconditionsforthedefrostcycleatxedevaporatingtemperature 80
3.17.3 Preparation for cycle reversal 80
3.17.4 Refrigeration cycle reversal and defrost 81
3.17.5 Forcing of a defrost cycle 81
3.17.6 Management of auxiliary heating during defrost cycle 82
3.17.7 Special management logics during defrosting 82
3.18 Other functions 83
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3.18.1 Management of control probe error 83
3.18.2 Heater in condensate drip tray 83
3.18.3 "Leak detector" management 83
3.18.4 Management of operating mode switching 85
3.18.5 Automatic mode switching 85
3.18.6 Flow rate reduction upon achievement of temperature setpoint 86
3.18.7 Activation according to time bands 87
3.19 Enabled functions 88
3.19.1 Option management 88
4 Alarms 89
4.1 Introduction 89
4.1.1 Automatic/Manual procedure and alarm reset 89
4.1.2 File “alarm.conf” 90
4.2 Unit alarms 91
4.2.1 Airowalarm 91
4.2.2 Dirtyltersalarm 91
4.2.3 Humidity alarm 92
4.2.4 Return temperature alarm 93
4.2.5 Delivery temperature alarm 94
4.2.6 Low external air temperature alarm 95
4.2.7 Thermal overload switch alarm in ventilation unit 96
4.2.8 Power supply alarm 97
4.2.9 Ventilation unit maintenance alarm 98
4.2.10 EEprom error alarm 98
4.2.11 Alarm: access error to internal memory 99
4.2.12 Internal memory error alarm 99
4.2.13 External alarm 100
4.2.14 c.pCOe communication error alarm 100
4.3 Function alarms 101
4.3.1 Fire/smoke alarm 101
4.3.2 Electronic valve driver alarm 102
4.3.3 Humidieralarms 102
4.3.4 Heater alarms 103
4.3.5 Defrost cycle ended due to max. time achieved 104
4.3.6 “Leak detector” alarms 104
4.3.7 General boiler and burner alarms 105
4.4 Circuit alarms 106
4.4.1 High-pressure alarms 106
4.4.2 Low pressure alarms 106
4.4.3 High discharge gas temperature alarm 108
4.4.4 Alarmforlowdierencebetweenhighandlowpressure 109
4.4.5 Low superheating alarm 109
4.5 Compressor alarms 110
4.5.1 Compressor maintenance alarm 110
4.5.2 Alarm for compressor operation outside envelope 110
4.5.3 Compressor inverter alarm 111
4.5.4 Compressor thermal overload switch alarms 111
4.6 Probe error alarms 112
4.6.1 Temperature probes 112
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4.6.2 Humidity probes 114
4.6.3 Pressure probes 115
4.6.4 Air quality probes 117
5 FAQ 118
5.1 Frequently Asked Questions 118
5.2 Switching the unit on and o󰀨 118
5.2.1 Switchtheunitonandofromthedisplay. 118
5.2.2 SwitchtheunitonandofromexternalOKsignal 118
5.2.3 SwitchtheunitonandofromtheBMS 118
5.3 Change of set points 119
5.3.1 Setpoint editing from display 119
5.3.2 SetpointeditingfromBMS 119
5.4 Change language 119
5.5 Changing the date and time 120
5.6 Setting of time bands 120
5.7 Replacing the serial protocol 121
Contents

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1 INTRODUCTION
1.1 General
Some information on the use of this manual.
The purpose of this manual is to provide all information regarding the software functions of the controller for the units listed
on the cover and it is complementary to the controller installation and programming manual.
This manual is the “SERVICE” version, that is, it is intended only for after-sales service technicians and Factory technicians.
Information regarding installation of the units and relevant tests and checks for the rst starting is not given in this manual.
It is taken for granted that the unit has been installed correctly, the tests and checks prior to start-up have been carried out
and that routine maintenance is carried out, according to the information given in the “Installation, operation and mainte-
nance” manual for the units.
We thank in advance all those who will wish to let us know of any errors, omissions, sections requiring further explanation
or operations that have not been included.
1.1.1 c.pCO controller functions
The software application for the electronic microprocessor controller, series c.pCO, was designed to manage Rooftop units.
Through appropriate conguration, this gives the possibility of managing a wide range of units with relevant specic fun-
ctionalities.
Management of Rooftop units means monitoring that all component parts operate safely throughout the various operating
cycles.
The family of c.pCO electronic microprocessor controllers includes various module sizes. The software is exible to the ex-
tent that the use of modules is optimized, meaning the modules used for reach application are those having the necessary
number of inputs and outputs.
The c.pCO board is connected to the various modules and communicates with them via a high speed, highly reliable eld
bus.
The controller user interface consists in a colour, 4.3” touch-screen display.
1 Introducon

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2 THE SCREENS
The user interface gives access to all information and setup parameters relating to unit operation. The manual describes
the access procedure to the desired information and to the parameter pages where the various functions can be set up.
2.1 Screen tree
The user interface gives access to all information and setup parameters relating to unit operation. The manual describes
the access procedure to the desired information and to the parameter pages where the various functions can be set up.
As explained in the description of icons, the home page gives direct access to the most signicant information and functions.
Most parameters and settings are featured in the screen, which are broken down in one main menu and various sub-menus.
A tree diagram of the screens is provided below to help the user browse and easily locate the screens of the user interface.
- Setpoint
* Unit
* Ventilation
* Humidification Dehumidification
* Dampers
* Auxiliary heating
* Post-heating gas
* Environment air renewal
- Probes
- I/O
* Universal inputs
* Digital inputs
* Driver 1
* Analog outputs
* Digital outputs
* Driver 2
- Language
* English
* Italian
* Swedish
* German
* French
* Spanish
* Polish
- Alarm history
- Charts
- Login
- Configuration
* Date hour
* Backlight
* Network
* HMI
* Led
* Font
- Parameters
* ST - Mechanical cooling
* STH - Mechanical heating
* SFA - Temperature control ventilation
* SP - Setup
* FA - Supply ventilation
* RFA - Return ventilation
* PAL - Alarms
* CF - Configuration
* CO - Compressors
* ET - Electronic thermostatic valve
* PID - PID parameters
* ES - Energy Saving
* UN - Unloading
* DF - Defrost
* HU - Humidity
* PD - Pump Down
* SD - Dynamic setpoint
* DA - Dampers
* EFA - External ventilation
* CA - Calibration probes
* RA - Transducer probe full scale
* ENV - Envelope
- Files management
* Saving timelog.txt
* Loading .conf
* Saving actual.conf
* Download files to USB key
- Maintenance
* Reset hours/starts
* Disabling
- Service
* Reset hours/starts
* Disabling
- pGD1 Emulator
2 The screens

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2.1.1 Screen menu
A click on the “Menu” button in the home page gives access to the main menu.
The arrow icon buttons featured in the main menu are used to scroll all lower level menus.
Access to lower level menus is allowed based on the user’s credentials. Some users have free access, while others have
to log in with the prole they are accredited for.
Access to the various menus is gained by clicking the colour area containing the menu description.
For easier understanding and use, texts are shown to explain the meaning of the values and parameters featured in the
screens.
2 The screens

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3 SOFTWAREFUNCTIONS
3.1 Introduction
For management of the units, special software is loaded into the controller.
The software consists of a combination of functions dedicated to the conditions in which the units may have to work.
The following chapters describe all the functions managed by the software, ranging from ordinary functions featured in all
units to functions dedicated to specic versions or models.
Some of the functions described here may be available only on specic versions or sizes, or according to
the selected accessories.
The software is designed to control rooftop units that are used to air-condition large spaces characterised by highly varying
human transit/stay, in which the air temperature, humidity and quality need to be monitored.
Great attention was given to an important aspect such as “Energy Saving”, which is why peculiar registrations were added
that help the units make use of favourable environmental conditions for energy saving purposes.
In describing the various functions, competence in operation of the units and knowledge of the relevant hydraulic or re-
frigerant circuits are taken for granted. All the descriptions, settings and parameters given refer to units that are correctly
installed as described in the relevant documentation.
3 Soware funcons

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3.2 Set point management
The control setpoint mainly depends on parameters “ST1” and “STH1”.
The relevant settable minimum and maximum setpoint parameters are shown below.
Parameter Min Max UM Description
ST1 ST2 ST3 °C Mechanical cooling - Temperature setpoint
ST2 10.0 ST3 °C Min. return air temperature setpoint
ST3 ST2 35.0 °C Max. return air temperature setpoint
STH1 STH2 STH3 °C Mechanical heating / Auxiliary heating in winter mode - Temperature
setpoint
STH2 5.0 STH3 °C Mechanical heating / Auxiliary heating in winter operating - Min. temperature
setpoint
STH3 STH2 55.0 °C Mechanical heating / Auxiliary heating in winter operating - Max. temperatu-
re setpoint
Provision has been made for ancillary functions that are designed to either add or subtract an o󰀨set value to/from these
setpoints.
Any automatic variation of the setpoint must be within the corresponding limits.
Parameter “SD2” is used to set the operating mode in which setpoint variation is enabled. There is only one
function available and this is the function enabled at the factory.
3.2.1 Dynamic Set Point
The dynamic set point is a function enabled by the manufacturer.
The reference parameters in managing the dynamic set point are described below.
Parameter Min Max UM Description
ST1 ST2 ST3 °C Mechanical cooling - Temperature setpoint
STH1 STH2 STH3 °C Mechanical heating / Auxiliary heating in winter mode - Temperature
setpoint
SD2 0 2 -States of the unit in which it is active
SD10 0.0 55.0 °C Mechanical cooling - External air temperature - Activation threshold for
compensation
SD11 0.0 15.0 °C Mechanical cooling - External air temperature - Activation di󰀨erential
SD12 -10.0 15.0 °C Mechanical cooling - External air temperature - Max increase / decrease of
the setpoint
SD20 0.0 55.0 °C Mechanical heating - External air temperature - Activation threshold for com-
pensation
SD21 0.0 15.0 °C Mechanical heating - External air temperature - Activation di󰀨erential
SD22 -10.0 15.0 °C Mechanical heating - External air temperature - Max increase / decrease of
the setpoint
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3.2.2 Dynamic setpoint from external air probe in cooling mode
The setpoint value entered in parameter “ST1” is “compensated” against the external air temperature.
The parameters concerned are shown in the table.
The values of the parameters are representative. In specic cases, di󰀨erent values can be set.
Parameter Value UM Description
ST1 27.0 °C Mechanical cooling - Temperature setpoint
SD2 1 -States of the unit in which it is active
SD10 25.0 °C Mechanical cooling - External air temperature - Activation threshold for compensation
SD11 15.0 °C Mechanical cooling - External air temperature - Activation di󰀨erential
SD12 -5.0 °C Mechanical cooling - External air temperature - Max increase / decrease of the
setpoint
A graphical representation is shown below.
Text °C
SD12 > 0
ST1
ST1 - SD12
SD11
SD10
SD12 < 0
ST1 + SD12
Fig. 1 Change in setpoint as the air temperature changes in cooling mode
Where“Text” is the value of the external air temperature.
When this function is enabled, the setpoint value that the controller uses to manage the air temperature in cooling mode is
as follows:
- if the external air temperature is lower than the setpoint in parameter “SD10”, the value of the control setpoint is the
value stored in parameter “ST1”;
- if the external air temperature is higher than the setpoint in parameter “SD10”, plus the value in parameter “SD11”, the
value of the control setpoint is given by the sum of the values stored in parameters “ST1” and “SD12”;
- if the external air temperature is between the values of parameter “SD10” and the sum of the values stored in parame-
ters “SD10” and “SD11”, the value of the control setpoint varies proportionally between the value stored in parameter
“ST1” and the sum of the values stored in parameters “ST1” and “SD12”.
Parameter “SD12” can have positive or negative values. When the value is negative, parameter “SD12” has
to be subtracted from the value of parameter “ST1”.
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3.2.3 Dynamic setpoint from external air probe in heating mode
The setpoint value entered in parameter “STH1” is “compensated” against the external air temperature.
The parameters concerned are shown in the table.
The values of the parameters are representative. In specic cases, di󰀨erent values can be set.
Parameter Value UM Description
STH1 40 °C Mechanical heating / Auxiliary heating in winter mode - Temperature setpoint
SD20 15.0 °C Mechanical heating - External air temperature - Activation threshold for compensation
SD21 10.0 °C Mechanical heating - External air temperature - Activation di󰀨erential
SD22 5.0 °C Mechanical heating - External air temperature - Max increase / decrease of the
setpoint
A graphical representation is shown below.
Text °C
SD22 > 0
STH1
STH1 - SD22
SD21
SD20
SD22 < 0
STH1 + SD22
Fig. 2 Change in setpoint as the air temperature changes in heating mode
Where“Text” is the value of the external air temperature.
When this function is enabled, the setpoint value that the controller uses to manage the air temperature in heating mode is
as follows:
- if the external air temperature is higher than the setpoint in parameter “SD20”, the value of the control setpoint is the
value stored in parameter “STH1”;
- if the external air temperature is lower than the setpoint in parameter “SD20”, minus the value in parameter “SD21”, the
value of the control setpoint is given by the sum of the values stored in parameters “STH1” and “SD22”;
- if the external air temperature is between the values of parameter “SD20” and the di󰀨erence of the values stored in
parameters “SD20” and “SD21”, the value of the control setpoint varies proportionally between the value stored in pa-
rameter “STH1” and the sum of the values stored in parameters “STH1” and “SD22”.
Parameter “SD22” can have positive or negative values. When the value is negative, parameter “SD22” has
to be subtracted from the value of parameter “STH1”.
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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 di󰀨erence between these values is calculated and the most suitable devices are started, based on this di󰀨erence.
The proportional band identies 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 identies 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.
STH6STH4
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 di󰀨erential
ST5 0.0 25.0 °C Proportional control - Cooling - Neutral activation area
ST6 0.0 25.0 °C Proportional control - Cooling - O󰀨set
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 di󰀨erential
STH5 0.0 25.0 °C Mechanical heating - Proportional - Activation neutral zone
STH6 0.0 25.0 °C Mechanical heating - Proportional - O󰀨set
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
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The value set in parameter “ST9” determines which control probe is to be used:
- 0 = temperature probe on air delivery line;
- 1 = temperature probe on air return line;
The value set in parameter “ST11” determines the type of temperature control, as follows:
- 0 = proportional.
- 1 = "Cascade";
- 2 = PID.
3.3.1 Thermoregulation in cooling mode
The thermoregulation of the unit depends on parameter “ST9”, which identies the reference probe for the temperature
setpoint (parameter “ST1”), and on parameter “ST11” which determines the type of temperature/humidity control.
In proportional control mode, the controller activates the available resources as the value read by the reference probe in-
creases in comparison to the setpoint value.
When “Cascade” temperature/humidity control is selected, the controller uses it to enable the resources and at the same
time monitor the air temperature in the delivery line.
In PID control mode, the controller activates the available resources as the demand increases. The controller calculates the
demand and checks the value measured by the probe against the setpoint value and according to its variation over time
using the parameters set in the PID.
Proportional temperature control
If parameter “ST11” is set to “0”, proportional control is enabled.
The parameters involved in proportional temperature control are shown in the table.
The values of the parameters are representative. In specic cases, di󰀨erent values can be set.
Parameter Value UM Description
ST1 24.0 °C Temperature setpoint
ST2 18.0 °C Min. air temperature setpoint
ST3 28.0 °C Max. air temperature setpoint
ST4 2.0 °C Proportional control - Cooling - Activation di󰀨erential
ST5 0.1 °C Proportional control - Cooling - Neutral activation area
ST6 0.1 °C Proportional control - Cooling - O󰀨set
A graphical representation is shown below.
ST5 ST6 ST4
100
0
%
ST1
SdR °C
Fig. 4 Graphical representation of cooling demand
In addition to the parameters listed in the table, the abbreviations in the graph are:
- SdR = reference probe;
- % = percentage demand value.
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“cascade”temperaturecontrol.
If parameter “ST11” is set to “1”, “Cascade” control is enabled.
This function fulls the system demand and keeps the air temperature in the delivery line within comfort values.
For this purpose, a virtual setpoint is calculated from the stored setpoint, as corrected with the air temperature in the return
line.
The setpoint is corrected dynamically as the air temperature changes in the return line.
The parameters involved in cascade temperature control are shown in the table.
The values of the parameters are representative. In specic cases, di󰀨erent values can be set.
Parameter Value UM Description
ST42 24.0 °C Cascade control - Unit setpoint
ST43 0.5 °C Mechanical cooling - Cascade control - Mode switching o󰀨set
ST44 4.0 °C Mechanical cooling - Cascade control - Operating di󰀨erential
ST45 15.0 °C Mechanical cooling - Cascade control - Min. delivery setpoint
The graph below illustrates cascade control.
Spd °C
ST45
ST43
Tra °C
ST44
ST42
ST42
AOC
Fig. 5 Change of air delivery setpoint with “cascade” control in cooling mode
In addition to the parameters listed in the table, the abbreviations in the graph are:
- Spd = air setpoint in delivery line;
- Tra = air temperature in return line;
- AOC = automatic mode switching.
If the air temperature in the return line is higher than the sum of the setpoints in parameters “ST42”+ “STH43”, the value of
the air setpoint in the delivery line is reduced gradually to go from the value in parameter “ST42” to the value in parameter
“STH45”, within the di󰀨erential set in parameter “STH44”.
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19
Service manualDaikin R32 Rooops UATYA-B
ESIE21-02 – 2021.03
Temperature control with a PID controller
If the value of parameter “ST11” is set to “2”, the temperature is controlled using a PID controller.
The parameters involved are shown in the table. Access to these parameters is for service technicians only.
The values of the parameters are representative. In specic cases, di󰀨erent values can be set.
Parameter Value UM Description
ST1 27.0 °C Temperature setpoint
ST2 10.0 °C Minimum temperature setpoint
ST3 35.0 °C Maximum temperature setpoint
ST4 2.0 °C Proportional control - Cooling - Activation di󰀨erential
ST5 0.0 °C Proportional control - Cooling - Neutral activation area
ST6 0.0 °C Proportional control - Cooling - O󰀨set
ST9 1 - Control probe
ST11 2 - Type of temperature control
PID70 3000 -Mechanical cooling - Kp
PID71 100 -Mechanical cooling - Ki
PID72 5 - Mechanical cooling - Kd
PID76 0.2 °C Mechanical cooling - Dead band
PID78 0 -Mechanical cooling - Dead band position
PID87 0 -Mechanical cooling - Manual override (0 = Disabled)
PID90 0.0 %Mechanical cooling - Min. output
PID91 100.0 %Mechanical cooling - Max. output
The use of a PID controller is strongly recommended for delivery temperature control.
The control of the air temperature in the delivery line requires the unit to have modulating cooling and heating devices.
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20
Service manual Daikin R32 Rooops UATYA-B
ESIE21-02 – 2021.03
3.3.2 Thermoregulation in heating mode
The thermoregulation of the unit in heating mode depends on parameter “ST9”, which identies the reference probe for the
temperature value in the setpoint (parameter “STH1”), and on parameter “ST11” which determines the type of temperature
control.
In proportional control mode, the controller activates the available resources as the value read by the reference probe de-
creases in comparison to the setpoint value.
When “Cascade” control is selected, the controller enables the resources and at the same time monitors the air temperature
in the delivery line.
In PID control mode, the controller activates the available resources as the demand increases. The controller calculates the
demand and checks the value measured by the probe against the setpoint value and according to its variation over time
using the parameters set in the PID.
Proportional temperature control
If parameter “ST11” is set to “0”, proportional control is enabled.
The parameters involved are shown in the table.
The values of the parameters are representative. In specic cases, di󰀨erent values can be set.
Parameter Value UM Description
STH1 20.0 °C Mechanical heating / Auxiliary heating in winter mode - Temperature setpoint
STH2 15.0 °C Mechanical heating / Auxiliary heating in winter operating - Min. temperature setpoint
STH3 40.0 °C Mechanical heating / Auxiliary heating in winter operating - Max. temperature setpoint
STH4 2.0 °C Mechanical heating - Proportional - Activation di󰀨erential
STH5 0.0 °C Mechanical heating - Proportional - Activation neutral zone
STH6 0.0 °C Mechanical heating - Proportional - O󰀨set
A graphical representation is shown below.
STH5STH6STH4
100
0
%
STH1
SdR °C
Fig. 6 Graphical representation of stepped heating demand
In addition to the parameters listed in the table, the abbreviations in the graph are:
- SdR = reference probe;
- % = percentage demand value.
3 Soware funcons