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Service manual

Daikin R32 Rooftops UATYA-B

ESIE21-02 – 2021.03

4.5 Compressor alarms

4.5.1 Compressor maintenance alarm

The controller records the number of operating hours of the compressors and outputs a message to warn about the need

for maintenance.

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

CO53

1000

Threshold for “compressor operating hours exceeded” alarm (0 = disabled)

Alarm code

AL127 for compressor 1 in circuit 1; AL128 for compressor 2 in circuit 1;

AL131 for compressor 1 in circuit 2; AL132 for compressor 2 in circuit 2.

Reason for activation

This is detected when the operating hours of the compressor exceed the limit set in para

meter “CO53”.

Reset

Upon deletion of the hours in the Service or Maintenance menu

Reset mode

Manual

Alarm icon

Flashing

AlarmLog

Yes

Alarm relay

Based on “alarm.conf” file

Devices

Behaviour in the event of an alarm

Compressors

They follow the control

The other devices

They follow their control

4.5.2 Alarm for compressor operation outside envelope

This alarm is only managed where the featured compressor is an inverter-controlled compressor.

Alarm code

AL247 for the compressor in circuit 1

Reset

One second after the compressor resumes operation inside the envelope

Reset mode

Automatic

Alarm icon

Flashing

AlarmLog

Yes

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

4 Alarms

Содержание UATYA-B

Страница 1: ...Operation manual Daikin R32 Rooftops UATYA B ESIE21 02...

Страница 2: ...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 Spec...

Страница 3: ...3 Service manual Daikin R32 Rooftops UATYA B ESIE21 02 2021 03 Version log Version log Version code Description Date ESIE21 02 Document release March 2021...

Страница 4: ...4 Service manual Daikin R32 Rooftops UATYA B ESIE21 02 2021 03 Page intentionally blank...

Страница 5: ...control with proportional control 26 3 4 4 Absolute humidity control with PID control 27 3 5 Air humidification 28 3 5 1 Ancillary built in humidifier functions 28 3 6 Air dehumidification 29 3 6 1 C...

Страница 6: ...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...

Страница 7: ...er 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...

Страница 8: ...nd off 118 5 2 1 Switch the unit on and off from the display 118 5 2 2 Switch the unit on and off from external OK signal 118 5 2 3 Switch the unit on and off from the BMS 118 5 3 Change of set points...

Страница 9: ...he 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 func...

Страница 10: ...elp 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 Pro...

Страница 11: ...ll 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 profile they are accredited for Access to t...

Страница 12: ...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 temperatu...

Страница 13: ...s 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 poi...

Страница 14: ...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 t...

Страница 15: ...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 tempe...

Страница 16: ...4 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...

Страница 17: ...n 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 a...

Страница 18: ...Cascade control Unit setpoint ST43 0 5 C Mechanical cooling Cascade control Mode switching offset ST44 4 0 C Mechanical cooling Cascade control Operating differential ST45 15 0 C Mechanical cooling Ca...

Страница 19: ...portional control Cooling Activation differential ST5 0 0 C Proportional control Cooling Neutral activation area ST6 0 0 C Proportional control Cooling Offset ST9 1 Control probe ST11 2 Type of temper...

Страница 20: ...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 tab...

Страница 21: ...control Unit setpoint STH46 0 5 C Mechanical heating Cascade control Mode switching offset STH47 4 0 C Mechanical heating Cascade control Operating differential STH49 30 0 C Mechanical heating Cascade...

Страница 22: ...esentative 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...

Страница 23: ...tion differential STH143 0 Preheating Minimum request STH144 100 Preheating Maximum request A graphical representation is shown below SdR C STH142 STH144 STH143 STH1 100 STH141 0 Fig 8 Graphical repre...

Страница 24: ...t HU2 0 0 HU3 Min relative humidity setpoint HU3 HU2 100 0 Max relative humidity setpoint HU4 0 0 25 0 Relative humidity control differential HU5 0 0 10 0 Relative humidity control neutral area HU6 HU...

Страница 25: ...f parameter HU11 is set to 0 humidity control is performed according to the relative humidity value Relative humidity is managed according to parameter HU14 which identifies the probe on which the con...

Страница 26: ...fication Dead band PID39 1 Humidity control for humidification Moving average PID41 0 Humidity control for humidification Manual override 0 Disabled PID44 0 Humidity control for humidification Min out...

Страница 27: ...meter HU12 is set to 1 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 t...

Страница 28: ...he water lines and the humidifier cylinder The cylinder is filled and then emptied 3 times in order to wash away impurities from the pipes and cylinder if any We recommend enabling this function espec...

Страница 29: ...n be set Parameter Value UM Description ST21 24 0 C Dehumidification Return temperature limitation activation threshold ST22 2 0 C Dehumidification Return temperature limitation deactivation different...

Страница 30: ...dehumidification based on which of the two is higher Once attributed priority is kept until the other demand is either higher or equal to the demand plus the percentage value set in parameter ST17 Exa...

Страница 31: ...y Improves system stability Speeds up system response Slows down system response Kd A deviation of the controlled value error variation determines a variation of the actuator output that is proportion...

Страница 32: ...Constant pressure control Min pressure setpoint FA35 10 0 3270 0 Pa Constant pressure control Max pressure setpoint FA36 0 0 3270 0 Pa Constant pressure control Neutral area FA37 0 0 3270 0 Pa Consta...

Страница 33: ...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 FA26 750 10 m3 h Constant ai...

Страница 34: ...te setpoint FA73 2 0 C Variable air flow control Cooling Heating Differenzial FA74 0 0 C Variable air flow control Cooling Heating Neutral zone FA75 0 0 C Variable air flow control Cooling Heating Off...

Страница 35: ...eating heating demand Cooling cooling demand The controller modulates the flow rate between the min setpoint stored in parameter FA71 when the temperature mea sured by the probe on the return line is...

Страница 36: ...trol Differential required for decrement FA38 5 0 Pa Constant pressure control Differential required for increment FA39 30 s Constant pressure control Max increment time FA40 15 s Constant pressure co...

Страница 37: ...stent with the set parameters Special conditions If the device sensing the pressure at the reference point experiences a malfunction the controller will override the output that controls ventilation...

Страница 38: ...t which corresponds to the value set in parameter FA52 If the measured value is lower than the setpoint minus the dead zone FA49 FA52 the controller calculates the per centage increment and the delay...

Страница 39: ...5 45 0 C Heating Supply air limitation Activation threshold STH156 2 0 C Heating Supply air limitation Deactivation differential STH157 3 0 Heating Supply air limitation Step of decrease STH158 15 s H...

Страница 40: ...82 is set to 1 Reduced air flow during the defrost cycle enhances room comfort but it also reduces the efficiency of the defrost cycle Great attention should be paid when setting reduced flow paramete...

Страница 41: ...e control Max increment time RFA40 0 60 s Constant pressure control Min increment time RFA41 15 999 s Constant pressure control Max decrement time RFA42 0 60 s Constant pressure control Min decrement...

Страница 42: ...ate setpoint RFA67 10 PID Constant air flow pecentage air flow control Kp RFA68 15 PID Constant air flow pecentage air flow control Ki RFA69 0 PID Constant air flow pecentage air flow control Kd RFA73...

Страница 43: ...d for decrement RFA38 5 0 Pa Constant pressure control Differential required for increment RFA39 60 s Constant pressure control Max increment time RFA40 15 s Constant pressure control Min increment ti...

Страница 44: ...t with the set parameters Special conditions If the device sensing the pressure at the reference point experiences a malfunction the controller will override the output that controls ventilation at th...

Страница 45: ...in parameter RFA52 If the measured value is lower than the setpoint minus the dead zone RFA49 RFA52 the controller calculates the increment percentage and the delay between the two ventilation variati...

Страница 46: ...e is 10 lower than the speed of the fans in the delivery line If ventilation control in the delivery line is set to variable flow the controller automatically overrides ven tilation control in the ret...

Страница 47: ...er alarm management When the min and max voltage relay trips the controller stops the unit and causes an alarm message to appear on the display The value entered in parameter CF17 and the supply or no...

Страница 48: ...can be restarted in a shorter time than a standard start up procedure if parameter CO28 is set in such way as to enable the Fast Restart function and an ultracap is fitted to power the controller The...

Страница 49: ...itions the compressors are started and stopped following a precise procedure The parameters involved are shown in the table The values of the parameters are representative In specific cases different...

Страница 50: ...essor with inverter The controller is designed for managing one inverter compressor on both single and dual circuit units The refrigerant circuit can consist of just the inverter compressor or of one...

Страница 51: ...3 and CO04 are met After ON OFF compressor start up the variation of the thermoregulation demand will be fulfilled by changing the inverter compressor speed As the controller has no other compressors...

Страница 52: ...ction induced by low pressure probe The controller offers the opportunity to override reduction capacity in the refrigerant circuit in order to keep the intake pres sure at higher values so as to prev...

Страница 53: ...erter compressor is required to reduce its capacity Capacity reduction override in circuits featuring one on off compressor only is not managed The capacity reduction override is stopped when the inta...

Страница 54: ...UN13 must be set to 100 and the value in parameter UN14 must be set at the percentage value at which the inverter compressor is required to reduce its capacity If capacity reduction is required to sw...

Страница 55: ...override percentage with function active CO49 35 Oil return function Percentage inverter threshold to activate function If the required cooling capacity involves operation of the compressor at a perce...

Страница 56: ...to cause the external air to flow through the heat recovery system when heat recovery is enabled and it is closed in free cooling mode If the heat recovery system is not sized to provide for a 100 ai...

Страница 57: ...on Min opening for evap press DA39 0 100 External air Opening limitation Max opening for evap press DA40 0 00 50 00 bar External air Opening limitation Deactivation diff for cond press DA41 0 00 30 00...

Страница 58: ...trol is designed to open the dampers so that the air can flow i e at the required percentage of the max possible opening All units featuring dampers are set by default to run a proportional control 3...

Страница 59: ...erature value is favourable the cooling demand in the room is fulfilled with air changing either totally or partially The free cooling function manages units with either 2 or 3 dampers recirculated ai...

Страница 60: ...tored in parameter DA12 and the max value in parameter DA13 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 d...

Страница 61: ...ode In addition to the parameters listed in the table the abbreviations in the graph are TeSdR temperature sensed by probe in return line opening signal percentage for external exhaust air If the exte...

Страница 62: ...2 Service manual Daikin R32 Rooftops UATYA B ESIE21 02 2021 03 A graphical representation is shown below DA10 DA11 DA13 DA12 STH1 TeSdR C Fig 28 Damper command in free heating mode 3 Software function...

Страница 63: ...m enthalpy h_en is higher than the external air enthalpy h_ex which in turn is higher than enthalpy setpoint h_set during operation in cooling mode or the room enthalpy h_en is lower than the external...

Страница 64: ...ppm External air Environment air renewal CO2 concentration diff for regulation DA23 50 0 External air Environment air renewal VOC concentration setpoint for activation DA24 0 0 External air Environmen...

Страница 65: ...is higher than the setpoint in parameter DA23 plus the offset value stored in parameter DA24 the controller increases the percentage of external air within the differential set in parameter DA25 The...

Страница 66: ...The values of the parameters are representative In specific cases different values can be set Parameter Value UM Description DA12 30 External air FC FH Min opening DA13 100 External air FC FH Max open...

Страница 67: ...e again only after condensing pressure values drop below the difference DA28 DA40 3 14 2 Limitation based on evaporating pressure in cooling mode When a refrigerant circuit in the unit is operating in...

Страница 68: ...ameter DA30 The damper opening signal starts following the ongoing opening percentage again only after evaporating pressure values drop below the difference DA30 DA41 3 14 3 Limitation based on evapor...

Страница 69: ...rameter DA34 The damper opening signal starts following the ongoing opening percentage again only after the evaporating pressure va lues rise above the sum DA34 DA41 3 14 4 Limitation based on condens...

Страница 70: ...damper opening as a result of the condensing and evaporating pressure has priority over all the other functions free cooling free heating CO2 and VOC 3 14 5 Min opening in relation to external air te...

Страница 71: ...peed EFA32 0 144 Cooling Night shift Beginning of time band 0 24 EFA33 0 144 Cooling Night shift End of time band 0 24 EFA34 0 1 Cooling Night shift Enable on Monday EFA35 0 1 Cooling Night shift Enab...

Страница 72: ...only one compressor is in operation in the refrigerant circuit ranging between the condensing temperature value resulting from the sum of parameters EFA9 EFA13 and the value in parameter EFA10 the fan...

Страница 73: ...one active compressor on two EFA11 52 0 C Cooling Condensation temperature for max speed opening EFA30 46 0 C Cooling Night shift Temperature at min speed EFA31 57 0 C Cooling Night shift Temperature...

Страница 74: ...ng temperature value calculated by conversion of the corresponding pressure in the refrigerant circuit Units featuring two refrigerant circuits have an independent speed adjustment function in each ci...

Страница 75: ...peed varies proportionally between values EFA14 and EFA15 When both compressors are in operation in the refrigerant circuit ranging between the evaporating temperature value resulting from the differe...

Страница 76: ...xiliary heating Summer oper Proportional Maximum request STH64 0 10000 Auxiliary heating Summer oper PID Kp STH65 0 10000 Auxiliary heating Summer oper PID Ki STH66 0 10000 Auxiliary heating Summer op...

Страница 77: ...s started with the delay value set in parameter STH140 This management logic includes the anti freeze function a boiler that is controlled by an analogue signal and a digital OK signal which gets enab...

Страница 78: ...activation of the two heating sources is prioritised according to the setpoint stored in parameter STH129 which may be STH129 0 heating by refrigerant circuit is prioritised over auxiliary heating STH...

Страница 79: ...999 s Forcing time of circuit at minimum on entering defrost mode if DF30 1 DF33 0 999 s Forcing time of circuit OFF on entering defrost mode if DF30 2 DF34 50 0 110 0 C Outside air temperature limit...

Страница 80: ...ost start evaporating temperature DF11 120 s Time defrost condition is maintained DF17 10 min Delay to first defrost after the unit is switched on DF18 30 min Minimum delay between two defrost cycles...

Страница 81: ...ost due to reaching the end of defrost threshold or due to reaching the time limit the next action is preparation for return of operation in heating mode 3 17 5 Forcing of a defrost cycle The starting...

Страница 82: ...s featured and parameter FA82 is set to 1 For enhanced room comfort during the defrost cycle the fan in the return line follows the setpoint in parameter RFA31 This only applies when constant flow con...

Страница 83: ...the unit is off 3 18 3 Leak detector management The controller manages a refrigerant gas detector serially and it monitors its correct operation If malfunctions or refrigerant leaks are identified th...

Страница 84: ...rameter RFA25 closes the digital output to control an area damper and additional ventilation which are not incorporated in the unit The control corresponds to terminals 666 and 667 in the terminal boa...

Страница 85: ...s 4 mode switching takes place automatically according to the values set in parameters ST1 and STH1 The value set in parameter ST1 must be higher than the setpoint in parameter STH1 If the setpoint in...

Страница 86: ...reduction upon achievement of temperature setpoint In applications specifically designed for this purpose the controller features the possibility to reduce the air flow rate when the temperature setpo...

Страница 87: ...h Time band 4 Start ES27 0 144 h Time band 4 End ES31 0 15 Heating mode activation Monday ES32 0 15 Heating mode activation Tuesday ES33 0 15 Heating mode activation Wednesday ES34 0 15 Heating mode...

Страница 88: ...CO2 air quality probe These functions are enabled in the screens containing the SP Setup parameters Access to these screens requires entry of Service credentials When a function is enabled the inputs...

Страница 89: ...e sum of the active intervals in the last hour allows the number of events alarms per hour to be calculated If the sum of the active intervals does not exceed the respective threshold value of occurre...

Страница 90: ...tal outputs and they include 0 no warning message 1 non serious alarm designed to trigger activation of corresponding digital output 2 serious alarm designed to trigger activation of corresponding dig...

Страница 91: ...om differential pressure transducer Alarm code AL5 Reason for activation When the pressure value measured by the differential pressure transducer is lower than the setpoint in parameter PAL115 after d...

Страница 92: ...e air return line is greater than the setpoint in parameter PAL77 Reset When the relative humidity value measured by the probe on the return line is lower than the difference between PAL77 and PAL78 R...

Страница 93: ...ing AlarmLog Yes Alarm relay Based on alarm conf file Devices Behaviour in the event of an alarm All devices They follow their control Low return air temperature alarm Alarm code AL29 Reason for activ...

Страница 94: ...n Flashing AlarmLog Yes Alarm relay Based on alarm conf file Devices Behaviour in the event of an alarm All devices They follow their control Low delivery air temperature alarm Alarm code AL31 Reason...

Страница 95: ...STH14 Reset When the outside air temperature rises above the value resulting from the sum of parame ter STH14 and 1 C Reset mode Automatic switches to manual after trip occurrences per hour set in PAL...

Страница 96: ...larm is open after the time set in parameter PAL25 has elapsed Reset When the digital input closes Reset mode Automatic switches to manual after the trip occurrences per hour set in PAL26 Alarm icon F...

Страница 97: ...igital input after the delay set in parameter CO30 Reset mode Always automatic Alarm icon Flashing AlarmLog Yes Alarm relay Based on alarm conf file Devices Behaviour in the event of an alarm All devi...

Страница 98: ...s in the Service or Maintenance menu Reset mode Manual Alarm icon Flashing AlarmLog Yes Alarm relay Based on alarm conf file Devices Behaviour in the event of an alarm Fans They follow the control The...

Страница 99: ...Log Yes Alarm relay Based on alarm conf file Devices Behaviour in the event of an alarm All devices All outputs are disabled 4 2 12 Internal memory error alarm Alarm code AL1 Reason for activation Non...

Страница 100: ...evant digital input is open after the delay setpoint in parameter PAL57 Reset Upon closing of the digital input after the delay set in parameter PAL58 Reset mode Automatic switches to manual after the...

Страница 101: ...ivation delay PAL44 1 s Fire Smoke De activation delay PAL45 0 Fire Smoke Max number of alarms per hour PAL46 0 Fire Smoke Action in presence of an alarm The values parameter PAL46 can have are the fo...

Страница 102: ...CPY humidifier General warning message Alarm delay upon activation PAL76 5 CPY humidifier General warning message Max number of alarms per hour CPY humidifier General alarm Alarm code AL162 Reason for...

Страница 103: ...e table The values of the parameters are representative In specific cases different values can be set Parameter Value UM Description PAL34 5 s Activation delay PAL35 5 Max number of alarms in one hour...

Страница 104: ...Dampers and ventilation When operating fully with outside air and if the digital OK signal for one area damper and additional ventilation are not featured in the unit Other devices All disabled Refri...

Страница 105: ...Behaviour in the event of an alarm Dampers and ventilation When operating fully with outside air and if the digital OK signal for one area damper and additional ventilation are not featured in the uni...

Страница 106: ...of the circuit involved are switched off The other devices They follow their control High pressure alarm from transducers Alarm code AL10 for circuit 1 and AL11 for circuit 2 Reason for activation Wi...

Страница 107: ...ssure probe is PAL2 Reset When the value measured by the pressure probe is than the difference between PAL2 and PAL3 Reset mode Automatic and becomes manual after PAL4 occurrences hour Alarm icon Flas...

Страница 108: ...ature alarm threshold PAL51 30 0 C Delivery high temperature alarm differential PAL52 2 Maximum number of alarms in one hour due to high delivery temperature Alarm code AL57 for circuit 1 compressor 1...

Страница 109: ...hour set in PAL95 Alarm icon Flashing AlarmLog Yes 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...

Страница 110: ...detected when the operating hours of the compressor exceed the limit set in para meter CO53 Reset Upon deletion of the hours in the Service or Maintenance menu Reset mode Manual Alarm icon Flashing Al...

Страница 111: ...tion error with inverter after time setpoint in PAL24 Reset As soon as communication is restored Reset mode Automatic Alarm icon Flashing AlarmLog Yes Alarm relay Based on alarm conf file Devices Beha...

Страница 112: ...otherwise it stops the functions referencing the values read by the probe The other devices They follow their own setup parameters if the unit stays operational and they do not depend on the probe rea...

Страница 113: ...m 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 Intake temperature Alarm co...

Страница 114: ...humidity control Humidity control is stopped The other devices They follow their control External air humidity Alarm code AL79 Reason for activation When the value measured by the analogue input is o...

Страница 115: ...ery air differential pressure Alarm code AL106 Reason for activation When the value measured by the analogue input is outside the set operating range Reset When the value measured by the analogue inpu...

Страница 116: ...therwise the unit stops The other devices They follow their own setup parameters if the fan stays operational otherwise they stop Static pressure in return line Differential pressure in aisle Alarm co...

Страница 117: ...alogue input is outside the set operating range Reset When the value measured by the analogue input falls within the set operating range Reset mode Automatic Alarm icon Flashing AlarmLog Yes Alarm rel...

Страница 118: ...2 Switch the unit on and off from external OK signal In order to switch the unit on and off from external OK signal make sure the feature is active To switch the unit on close the external OK signal...

Страница 119: ...d Set the new value and apply the green tick to confirm Units featuring mode switching have a setpoint for cooling ST7 and a setpoint for heating STH7 The setpoint for cooling ST7 must necessarily be...

Страница 120: ...g the new value tick it to confirm it After changing the values tap the Save icon on the bottom right hand side to save the new setpoints The arrow on the left is used to go back to the previous scree...

Страница 121: ...rotocol is highlighted by a green circle on the right When the protocol is replaced the controller must be restarted When an option is enabled a request for controller restart appears automatically in...

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