Daikin UATYA-B Operation Manual
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Daikin UATYA-B Operation Manual

Daikin UATYA-B Operation Manual

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ESIE21-02
Operation manual
Daikin R32 Rooftops UATYA-B

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  • Page 1 ESIE21-02 Operation manual Daikin R32 Rooftops UATYA-B...
  • Page 2 Disclaimer The present publication is drawn up by way of information only and does not constitute an offer 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 fitness for particular purpose of its content and the products and services presented therein.
  • Page 3 Version log Version log Version code Description Date ESIE21-02 Document release March 2021 Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 4 Page intentionally blank Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 5: Table Of Contents

    Special conditions 3.9.8 Ventilation in return line 3.9.9 Constant flow ventilation control 3.9.10 Ventilation control at constant pressure 3.9.11 Ventilation control with constant pressure difference 3.9.12 Ventilation control based on a percentage of the delivery value 3.9.13 Special conditions Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 6 Preparation for cycle reversal 3.17.4 Refrigeration cycle reversal and defrost 3.17.5 Forcing of a defrost cycle 3.17.6 Management of auxiliary heating during defrost cycle 3.17.7 Special management logics during defrosting 3.18 Other functions Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 7 Low superheating alarm Compressor alarms 4.5.1 Compressor maintenance alarm 4.5.2 Alarm for compressor operation outside envelope 4.5.3 Compressor inverter alarm 4.5.4 Compressor thermal overload switch alarms Probe error alarms 4.6.1 Temperature probes Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 8 Switch the unit on and off from the display. 5.2.2 Switch the unit on and off from external OK signal 5.2.3 Switch the unit on and off from the BMS Change of set points 5.3.1 Setpoint editing from display 5.3.2 Setpoint editing from BMS Change language Changing the date and time Setting of time bands Replacing the serial protocol Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 9: Introduction

    The c.pCO board is connected to the various modules and communicates with them via a high speed, highly reliable field bus. The controller user interface consists in a colour, 4.3” touch-screen display. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 10: The Screens

    * 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 Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 11: Screen Menu

    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. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 12: Software Functions

    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. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 13: Set Point Management

    SD21 15.0 °C Mechanical heating - External air temperature - Activation differential Mechanical heating - External air temperature - Max increase / decrease of SD22 -10.0 15.0 °C the setpoint Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 14: Dynamic Setpoint From External Air Probe In Cooling Mode

    “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”. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 15: Dynamic Setpoint From External Air Probe In Heating Mode

    “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”. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 16: Temperature Control

    Mechanical heating - PID - Ki STH23 10000 Mechanical heating - PID - Kd STH27 25.0 °C Mechanical heating - PID - Dead band STH29 Mechanical heating - PID - Dead band position Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 17: Thermoregulation In Cooling Mode

    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. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 18 “ST42” to the value in parameter “STH45”, within the differential set in parameter “STH44”. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 19 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. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 20: Thermoregulation In Heating Mode

    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. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 21 “ST42” to the value in parameter “STH49”, within the differential set in parameter “STH47”. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 22: Disabling Heating Sources Depending On External Air Temperature

    - 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. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 23: Pre-Heating Coil

    “STH141”, the controller increases the valve opening percentage to the coil, within the differential set in parameter “STH142”. Temperature control ranges between the min. value stored in parameter “STH143” and the max. value in parameter “STH144”. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 24: Humidity Control

    PID41 10000 Humidity control for humidification - Manual override (0 = Disabled) PID44 10000 Humidity control for humidification - Min. output PID45 10000 Humidity control for humidification - Max. output Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 25: Relative Humidity Control With Proportional Control

    Min. relative humidity setpoint 65.0 Max. relative humidity setpoint Relative humidity control differential Relative humidity control neutral area A graphical representation is shown below. SdR % Fig. 10 Relative humidity control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 26: Relative Humidity Control With Pid Control

    Min. absolute humidity setpoint 2000 g/kg Max. absolute humidity setpoint 1000 g/kg Absolute humidity control differential HU10 g/kg Absolute humidity control neutral area HU11 Humidity value control type HU12 Humidity control type Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 27: Absolute Humidity Control With Pid Control

    Humidity control for humidification - Moving average PID41 Humidity control for humidification - Manual override (0 = Disabled) PID44 Humidity control for humidification - Min. output PID45 Humidity control for humidification - Max. output Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 28: Air Humidification

    The cylinder is drained and remains as such until it receives a signal requesting the production of steam. The function is always active and the shutdown interval is fixed. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 29: Air Dehumidification

    If the limitation function is enabled, the corresponding alarm is active (“AL26” - Limitation of air temperature in return line enabled). If the probe sensing the air temperature in the return line is in error, the limitation is disabled. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 30: Priority Between Temperature And Humidity Control

    When priority is given to de-humidification, the de-humidification demand is always prioritised, irrespective of the value. In other words, if the de-humidification demand is 50%, for instance, and the cooling demand is 100%, the controller enables resources at 50%. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 31: Tips For Pid Controller Setup

    The new Kp value must not exceed 750. If, on the other hand, the system response needs to be slowed down for greater stability, the new Kp value must not be inferior to 250. Daikin R32 Rooftops UATYA-B Service manual...

  • Page 32: Room Ventilation

    Constant pressure difference control - Min. decrement time FA59 Constant pressure difference control - Max. increment amplitude FA60 Constant pressure difference control - Min. increment amplitude FA61 Constant pressure difference control - Max. decrement amplitude Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 33: Constant Flow Ventilation Control

    The calculated value is compared with the setpoint stored in parameter “FA26”. The controller uses the PID components to change the analogue fan-controlling signal in order to achieve and keep the setpoint. The dead band value stored in parameter “PID53” is provided to stabilise ventilation system operation. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 34: Variable Flow Ventilation Control

    The controller calculates the air flow rate using the formula below. Fig. 13 Formula for air flow rate calculation Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 35: Ventilation Control With Constant Pressure Difference

    PID component. The dead band value stored in parameter “PID53” is provided to stabilise ventilation system operation. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 36: Ventilation Control At Constant Pressure

    Pdr Pa FA38 FA36 FA36 FA37 FA33 Tvar s FA39 FA41 FA40 FA42 Pdr Pa FA38 FA36 FA36 FA37 FA33 Fig. 15 Images showing the percentage and time variation as pressure changes Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 37 Constant pressure difference control - Max. increment amplitude FA60 Constant pressure difference control - Min. increment amplitude FA61 Constant pressure difference control - Max. decrement amplitude FA62 Constant pressure difference control - Min. decrement amplitude Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 38 On the other hand, the smaller the distance between the measured pressure difference and the setpoint, the smaller the speed percentage variation and the longer the time between two consecutive variations. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 39: Min. And Max. Temperature Limitation In Delivery Line

    If the air temperature value in the delivery line drops again below the value resulting from the difference between the setpoints in parameters “STH155” and “STH156”, heating capacity limitation is stopped and all the devices in operation follow the thermoregulation demand. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 40: Special Conditions

    In cases when priority is given to dehumidification or when the dehumidification function only is enabled and ventilation is controlled based on the flow rate (constant or variable/percentage), operation is set to follow the dehumidification flow rate setpoints. The setpoint value is entered in parameter “FA11”. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 41: Ventilation In Return Line

    PID - Constant air flow / pecentage air flow control - Kp RFA68 10000 PID - Constant air flow / pecentage air flow control - Ki RFA69 10000 PID - Constant air flow / pecentage air flow control - Kd Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 42: Constant Flow Ventilation Control

    The speed of the fans will, in any case, be set within the range of the minimum and maximum values stored in parameters “RFA7” and “RFA8” respectively in order to keep the flow rate setpoint. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 43: Ventilation Control At Constant Pressure

    Pdr Pa RFA38 RFA36 RFA36 RFA37 RFA33 Tvar s RFA39 RFA41 RFA40 RFA42 Pdr Pa RFA38 RFA36 RFA36 RFA37 RFA33 Fig. 18 Images showing the percentage and time variation as pressure changes Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 44: Ventilation Control With Constant Pressure Difference

    Constant pressure difference control - Max. increment amplitude RFA60 Constant pressure difference control - Min. increment amplitude RFA61 Constant pressure difference control - Max. decrement amplitude RFA62 Constant pressure difference control - Min. decrement amplitude Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 45 If the temperature/humidity control parameters need to be edited, the new entered values must be consi- stent with the set parameters. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 46: Ventilation Control Based On A Percentage Of The Delivery Value

    In cases when priority is given to dehumidification or when the dehumidification function only is enabled and ventilation is controlled based on the flow rate (constant or variable/percentage), operation is set to follow the dehumidification flow rate setpoints. The setpoint value is entered in parameter “RFA11”. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 47: Power Supply Control

    The “Fast Restart” function does not jeopardise the conditions of the compressors as it limits the number of quick starts over the space of an hour or a day. The parameters involved are shown in the table. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 48 - are activated, which are reset automatically after the relevant monitoring time. Warning messages appearing to warn about the max. number of fast restarts over an hour (“AL191”) or twenty-four hours (“AL192”) having been achieved cannot be reset manually. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 49: Circuits And Compressors

    - Rqs = thermoregulation request - R_St = actual status - Unt = reference to the unit - Cmp1 = reference to compressor 1 - Cmp2 = reference to compressor 2 Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 50: Management Of Compressor With Inverter

    Below is a graphical representation of the operating sequence of an inverter compressor and an on/off compressor, based on the thermoregulation demand variation. ET25 ET24 C inv Fig. 21 Compressor start-up Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 51 Daikin R32 Rooftops UATYA-B Service manual...

  • Page 52: Capacity Reduction Override

    In addition to the parameters present in the table, the other abbreviations in the graph indicate: - Lp = variation of low pressure value; - C1 = status of compressor 1; - C2 = status of compressor 2. - t = time Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 53 Time between two capacity reductions of the same circuit A graphical representation of capacity reduction due to low pressure is shown below. UN18 UN17 UN17 Fig. 23 Capacity reduction due to high pressure Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 54 “UN6”, or after the time setpoint stored in parameter “UN17” has elapsed. If the capacity reduction override is stopped after the time set in parameter “UN17”, but the condition persists for the time set in parameter “UN18”, the override is restored. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 55: Circuits And Compressors - Functions

    If the inverter compressor is connected in parallel with ON/OFF compressors, the minimum refrigerant speed required for oil return is normally always guaranteed when an ON/OFF compressor is running at the same time as the inverter compressor. Daikin R32 Rooftops UATYA-B Service manual...

  • Page 56: Damper Management

    External air - Environment air renewal - VOC concentration offset for regula- DA24 100.0 tion External air - Environment air renewal - VOC concentration diff. for regula- DA25 100.0 tion Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 57 External air - PID - Adaptive control - Dead band DA69 External air - PID - Adaptive control - Dead band position DA91 Recirculation air - Min opening DA92 Recirculation air - Max opening Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 58: Damper Control

    While the washing cycle is in progress, a button flashes on the main screen: it is pressed to stop the cycle manually before the time set in parameter “DA54” elapses. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 59: Recirculation

    External air - FC / FH - Min opening DA13 External air - FC / FH - Max opening A graphical representation is shown below. DA13 DA12 TeSdR °C Fig. 25 Damper command in free cooling mode Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 60 Winter free cooling is enabled if the air temperature in the return line is higher than the value in the summer setpoint “ST1” and the conditions required for free cooling are met. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 61: Free Heating

    When the reference air temperature is higher than the setpoint value, the free heating function reduces the opening of the outside air damper to the min. value. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 62 Software functions A graphical representation is shown below. DA11 DA13 DA12 TeSdR °C DA10 STH1 Fig. 28 Damper command in free heating mode Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 63: Enthalpy-Based Free Cooling And Free Heating

    Damper opening may be limited with respect to the max. value set in parameter “DA13” as a result of problems with tempe- rature or pressure, as described in the chapter on limitations. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 64: Air Change In The Room

    Damper opening may be limited with respect to the max. value set in parameter “DA13” as a result of problems with tempe- rature or pressure, as described in the chapter on limitations. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 65: Voc Control

    If the unit is designed for air change based on both CO and “VOC” control, the dampers are opened depen- ding on which of the two demands is higher. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 66: Limitation Of Damper Operation

    Fig. 31 Damper command in free cooling mode In addition to the parameters listed in the table, the abbreviations in the graph are: - Pcond = condensing pressure; - As% = opening signal percentage for external/exhaust air. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 67 External air - Opening limitation - Deactivation diff. for cond. press. A graphical representation is shown below. DA13 DA39 DA38 DA12 Pevap (bar) DA41 DA31 DA30 Fig. 32 Damper command in free cooling mode Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 68: Limitation Based On Evaporating Pressure In Cooling Mode

    External air - Opening limitation - Deactivation diff. for cond. press. A graphical representation is shown below. DA13 DA39 DA38 DA12 Pevap (bar) DA35 DA41 DA34 Fig. 33 Damper command in free cooling mode Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 69: Limitation Based On Condensing Pressure In Heating Mode

    External air - Opening limitation - Deactivation diff. for cond. press. A graphical representation is shown below. DA13 DA37 DA36 DA12 Pcond (bar) DA33 DA40 DA32 Fig. 34 Damper command in free cooling mode Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 70: Min. Opening In Relation To External Air Temperature

    “DA14”. This is the case when defrosting takes place reversing the refrigeration cycle, for as long as the coil of the 4-way valve in the refrigerant circuit is de-energised. As a consequence, the recirculated air damper is fully open. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 71: Source-Side Ventilation

    Cooling - Condensation temperature with only one active compressor on two EFA11 52.0 °C Cooling - Condensation temperature for max. speed/opening EFA12 °C Cooling - Cut-off differential EFA13 10.0 °C Cooling - Offset Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 72 If the condensing temperature value drops below the difference between parameters “EFA9” - “EFA12”, the controller stops ventilation. Where capacity reduction is overridden due to high pressure, ventilation control is performed as in cases when both compressors are in operation. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 73: Night Shift System Function

    In addition to the parameters listed in the table, the abbreviations in the graph are: - Tcond = Condensing temperature - % = percentage value of signal for fan control - 1c = one compressor in operation - 2c = two compressors in operation Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 74: Evaporation Control

    In addition to the parameters listed in the table, the abbreviations in the graph are: - Tcond = Condensing temperature - % = percentage value of signal for fan control - 1c = one compressor in operation - 2c = two compressors in operation Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 75 If the evaporating temperature value is higher than the sum of parameters “EFA17”+ “EFA20”, the controller stops ventila- tion. Where capacity reduction is overridden due to low pressure, ventilation control is performed based on the value envisaged in cases when both compressors are in operation. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 76: Auxiliary Heating

    Auxiliary heating - Winter oper. - PID - Min. output STH119 100.0 Auxiliary heating - Winter oper. - PID - Max. output STH123 -100.0 100.0 °C Auxiliary heating - Deactivation threshold for low external air temperature Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 77: Controlled Devices

    “STH137” and an OK signal for activation. The anti-freeze function is disabled when the outside air temperature has exceeded the value set in parameter “STH136” by 1 °C. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 78: Post Heating

    - if the air temperature in the return line is lower than the setpoint in parameter “STH1”, the unit operates in winter mode; - if the value is higher than the setpoint in parameter “ST1”, the unit operates in summer mode. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 79: Defrosting

    To complete defrost management, in addition to the main stages, the controller gives the possibility of manual forcing by operators or automatic forcing when particular conditions occur. For optimised defrosting and constant comfort in the rooms the controller can adjust the dampers and the air flow rate. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 80: Simultaneous Or Separate Defrost

    Depending on the value set in parameter DF30, before refrigeration cycle reversal, the controller maintains the condition for the time set in the values of parameters DF31 or DF32 or DF33. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 81: Refrigeration Cycle Reversal And Defrost

    The controller activates a “forced” defrost cycle, ignoring the set delays, when the evaporating temperature reaches the threshold setpoint in parameter “DF21” and maintains it for the time set in parameter “DF22”. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 82: Management Of Auxiliary Heating During Defrost Cycle

    “DA14”. This is the case when defrosting takes place reversing the refrigeration cycle, for as long as the coil of the 4-way valve in the refrigerant circuit is de-energised. As a consequence, the recirculated air damper is fully open. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 83: Other Functions

    - sets the dampers for total air recycling; - it overrides ventilation in the delivery line according to the setpoint in parameter “FA25”; - it overrides ventilation in the return line according to the setpoint in parameter “RFA25”; Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 84 The controller starts the procedure following an alarm connected to the gas detector, including when the unit is in “OFF” mode. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 85: Management Of Operating Mode Switching

    - 6 - From BMS management system: this option enables mode switching serially. If the value of parameter “SP40” is set to “4” by mistake, with air monitoring in the delivery line, the software automatically corrects the selection to “2”. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 86: Flow Rate Reduction Upon Achievement Of Temperature Setpoint

    “FA” parameters refer to the flow rate in the delivery line; “RFA” parameters refer to the flow rate in the return line. If the value set in parameters “FA76” and “RFA29” is = “0”, the ventilation system is switched off as soon as the temperature setpoint is achieved. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 87: Activation According To Time Bands

    In order for cooling/heating switching to work with time bands, the value in parameter “SP40” must be set to “3”. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 88: Enabled Functions

    If none of the two actions above is selected, the controller gets restarted at the end of the countdown. If the restart procedure is delayed, the controller will automatically display a restart message after a few seconds. The controller may also be restarted by de-energising and then re-energising it. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 89: Alarms

    Even if the alarm is no longer active, only a manual reset will cause the deletion of the alarm from the display and from the list of active alarms. Alarms that merely notify, that is, no output is energized/de-energized are also managed in the application. These are called WARNINGS. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 90: File "Alarm.conf

    The file can be accessed and edited using any text editor. Refer to the chapter on programming procedures for the upload of the “alarm.conf” file into the controller and its editing. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 91: Unit Alarms

    When the relevant digital input closes Reset mode Automatic Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm All devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 92: Humidity Alarm

    Automatic; switches to manual after the trip occurrences per hour set in “PAL78” Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm All devices They follow their control Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 93: Return Temperature Alarm

    AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Dehumidification demand It follows the function designed to limit the air temperature in the return line. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 94: Delivery Temperature Alarm

    AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Cooling demand It follows the function designed to limit the air temperature in the delivery line. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 95: Low External Air Temperature Alarm

    Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Mechanical heating The controller stops it. The other devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 96: Thermal Overload Switch Alarm In Ventilation Unit

    Devices Behaviour in the event of an alarm The alarm is displayed for warning purposes only. The fans concerned are stopped Source-side fans electro-mechanically. The other devices They follow their control Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 97: Power Supply Alarm

    One hour after alarm “AL201” causing the activation has tripped. Reset mode Automatic only Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm All devices All outputs are disabled. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 98: Ventilation Unit Maintenance Alarm

    EEprom memory error in controller Reset Controller replacement Reset mode Manual Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm All devices All outputs are disabled. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 99: Alarm: Access Error To Internal Memory

    If the alarm persists, replace the controller with a new one provided by the unit manufactu- rer. Reset mode Automatic Alarm icon Flashing AlarmLog Alarm relay Devices Behaviour in the event of an alarm All devices The controller will not work. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 100: External Alarm

    Reset As soon as serial communication is restored. Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm All devices Unit operation stop Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 101: Function Alarms

    Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm All devices According to setpoint in parameter “PAL46” Fire damper Closing of digital output for fire damper control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 102: Electronic Valve Driver Alarm

    Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Humidifier According to parameters set in CPY board The other devices They follow their control Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 103: Heater Alarms

    Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Heaters The controller stops the involved heaters. The other devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 104: Defrost Cycle Ended Due To Max. Time Achieved

    After sensor replacement Reset mode Manual Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Other devices Warning only (all devices follow their setting) Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 105: General Boiler And Burner Alarms

    Always automatic Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Burner The controller stops burner management. Other devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 106: Circuit Alarms

    Low pressure alarm threshold during operation PAL3 Low pressure alarm differential during operation PAL4 Maximum number of alarms in one hour due to low pressure PAL10 Low pressure alarm delay at full operating speed Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 107 Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Compressors Only the compressors of the circuit involved are switched off The other devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 108: High Discharge Gas Temperature Alarm

    Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Compressors Only the compressors of the circuit involved are switched off The other devices They follow their control Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 109: Alarm For Low Difference Between High And Low Pressure

    Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Compressors Only the compressors of the circuit involved are switched off The other devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 110: Compressor Alarms

    Alarm icon Flashing AlarmLog Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Compressors The inverter-controlled compressor switches off. The other devices They follow their control Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 111: Compressor Inverter Alarm

    Compressors not in alarm all compressors of the same circuit are switched off Ventilation If in common with other compressors, it follows its control, otherwise it stops Other devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 112: Probe Error Alarms

    The other devices They follow their own setup parameters if the fan stays operational, otherwise they stop. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...
  • Page 113 Alarm relay Based on “alarm.conf” file Devices Behaviour in the event of an alarm Compressors Only the compressors of the circuit involved are switched off The other devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 114: Humidity Probes

    They follow their own setup parameters: if the probe experiences a fault, all the tests requi- All devices red to start the functions connected to the external humidity value are bypassed. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 115: Pressure Probes

    Unit fan lated as the average of the measured values, otherwise the unit stops. The other devices They follow their own setup parameters if the fan stays operational, otherwise they stop. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
  • Page 116 Unit fan lated as the average of the measured values, otherwise the unit stops. The other devices They follow their own setup parameters if the fan stays operational, otherwise they stop. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 117: Air Quality Probes

    Behaviour in the event of an alarm Air change Air change is not allowed if it is dependant on the value of a malfunctioning probe. The other devices They follow their control Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 118: Faq

    The external OK signal must be a potential-free contact. 5.2.3 Switch the unit on and off from the BMS In order to switch the unit on and off from the BMS, make sure the feature is active. See dedicated BMS management document. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 119: Change Of Set Points

    When in the main menu, press “Languages” to access the screens in which the available languages are displayed. If the language you are looking for is not in the screen, use the arrows to find it. The selected language becomes active as soon as it is selected. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...

  • Page 120: Changing The Date And Time

    After selecting “ES Energy saving”, access is gained to the group of parameters used to set up the time bands. Refer to the relevant chapter for more information on the parameter setup logic. Service manual Daikin R32 Rooftops UATYA-B ESIE21-02 – 2021.03...

  • Page 121: Replacing The Serial Protocol

    If none of the two actions above is selected, the controller gets restarted at the end of the countdown. If the restart procedure is delayed, the controller will automatically display a restart message after five minutes. The controller may also be restarted by de-energising and then re-energising it. Daikin R32 Rooftops UATYA-B Service manual ESIE21-02 – 2021.03...
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