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Operating Manual

Daikin D-AHU Professional AH-ERQ-U, Operating Manual

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D-EOMOAH00903-21_01EN 29 / 37

Through this section it is possible to:

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Visualize and modify date and time;

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Visualize useful information about software application installed;

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Visualize the actual controller IP address and firmware version installed;

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Summary of Contents for D-AHU Professional AH-ERQ-U

Page 1: ...Digital AHU ADK D STREAM Revision 01 Date 06 2021 Supersede D EOMOAH00903 21EN OPERATING MANUAL D EOMOAH00903 21_01EN...

Page 2: ...13 6 7 Setpoints 14 6 8 I O Overview 17 6 9 Time Scheduler 18 6 10 Alarm handling 21 6 11 About Unit 28 7 Modbus nodes diagnostic and alarms 30 7 1 Node HardwareErr 30 7 2 Node CommErr 30 7 3 Node In...

Page 3: ...unication state is the BLUE led D EOMOAH00903 21EN 0 March 2021 First edition 1 2 Notice 2014 Daikin Applied Europe Cecchina Roma All rights reserved throughout the world The following are trademarks...

Page 4: ...some other way All handling that affects the prescribed disconnection of the protective extra low voltage AC 24 V must be avoided Disconnect the supply voltage before opening the apparatus cabinet Ne...

Page 5: ...g 1 AH ERQ U The AH ERQ U is connected with the Daikin ERQ condensing unit 2 AH W U The AH Water U is connected with an external device that provides hot water or cold water used in a water heat excha...

Page 6: ...d Red Hardware Error Flashing Green BSP startup phase The controller needs time for starting Flashing Yellow Application not loaded Flashing Yellow Red Fail safe mode in case that the BSP upgrade was...

Page 7: ...e starts according to the sequence shown in the figure above The same sequence describes also the devices turn off order by following the opposite direction ensuring that the upper devices are directl...

Page 8: ...ath Main Menu Ctrl Source Main Menu item Value Description Control Source Local BMS Local a HMI unit control managed directly from the controller interface or automatically via time scheduler Refer to...

Page 9: ...below HMI Path Main Menu Actual Mode Main Menu item Value Description Actual Mode Off On Ventilation Economy Off AHU in Off mode All devices installed on the AHU fans cooling heating coil dampers etc...

Page 10: ...in alarm state This state is displayed when an alarm has been detected Manual AHU in Test mode The AHU is in this state when Local Switch is set to Test Refer to Local Switch page for more details Pa...

Page 11: ...U Offset if present Winter mode Temperature Heat R U Offset if present Supply Fan Display the actual setpoint value for the supply fan This value is the sum of the basic setpoint plus the offset evalu...

Page 12: ...HU In this mode all controls are active and setpoints related to temperature regulation and fans control are the normal setpoints Refer to Setpoints page to change normal setpoints Ventilation Switch...

Page 13: ...he changeover is managed via a Building Management System BMS through BACnet or Modbus protocol communication For additional information on summer winter changeover logics and settings refer to Summer...

Page 14: ...the AHU Current State Summer Winter Display the current state in which the AHU is operating Auto mode settings Tmp Used Return Room Outside Select the temperature monitored to determine the Summer Win...

Page 15: ...e control selected Band Temp Economy 10 Heat C Deadzone temperature setpoint in Economy mode Available only when temperature regulation with deadzone control selected Pursuit 10 40 C Pursuit mode temp...

Page 16: ...nt in case of defrost of the condensing unit ERQ Available only if fan defrost limitation control enabled Supply filter Warning 1 2 3 4 0 1000 Pa Differential Pressure threshold for Warning on supply...

Page 17: ...Digital inputs can be connected to alarm signals coming from different installed devices in the AHU Fan Damper Pressure Switch Water Pump etc or to external switches Emergency stop Unit enable Analog...

Page 18: ...r for more details Copy schedule Off On Copy Monday schedule to all weekdays Tuesday Active Passive Active if the present day is Tuesday Refer to Day Scheduler for more details Sunday Active Passive A...

Page 19: ...ue is set incorrectly i e it is less than the previous the AHU will not work properly and it could be always keep ON or OFF 6 9 2 Calendar exception and Calendar fix off Exception days are defined in...

Page 20: ...1 2009 is an exception date Start date Mo 00 Every Monday is an exception day Start date Evn 00 The days for the entire month are exception day for each even month February April June August etc Examp...

Page 21: ...itches to OFF state and controls remain locked until the alarm condition is restored An example of critical alarm is a fan fault 6 10 1 Alarm restore When an alarm is displayed on the controller follo...

Page 22: ...p no sensor over range under range shortd loop Error condition on the room air temperature sensor measured temperature out of the allowable range or error condition on the sensor Error Causes Solution...

Page 23: ...nder range If the measured value is wrong replace the sensor shortd loop The sensor could be broken Disconnect the temperature sensor from the controller and measure the resistance value of the sensor...

Page 24: ...alarm condition Causes Solutions The alarm signal of the water pump is not connected to the controller Check the wiring connection between the input Cooling Heating coil pump alarm of the controller a...

Page 25: ...larm occurs when the alarm signal from the external condensing unit is active Causes Solutions The alarm signal of the condensing unit is not connected to the controller Check the wiring connection be...

Page 26: ...Causes Solutions Return fan is far from the set point for a predefined period Check return fan condition Retrn Hum rel under range Return Room air humidity over limit or error condition on the air hu...

Page 27: ...ify if in the alarm list there is some alarm related to the return temperature sensor and in this case refer to it Supply tmp fire alm Alarm Supply air temperature too high possible presence of fire C...

Page 28: ...e the DIP switch value refer to the wiring diagram ERQ 1 alarm Alarm Digital input related to the ERQ 1 is closed Causes Solutions Error on the ERQ Check the operating manual of the ERQ ERQ 2 alarm Al...

Page 29: ...29 37 Through this section it is possible to Visualize and modify date and time Visualize useful information about software application installed Visualize the actual controller IP address and firmwa...

Page 30: ...ne from the Modbus communication Notification MT4 LED 5 Yellow Delay 10sec Reset type Automatic Countermeasure Node could be offline because of a Hardware Error or because is not powered on Led alive...

Page 31: ...tErr RtrnTmpSenf RtrnFanPressSenf In order to associate Node InOutErr with each sensor fault it is necessary to browse the I O section in the HMI or examine the wiring diagram 7 6 2 Node CommErr behav...

Page 32: ...on the temperature setpoint Enabling and disabling of the Occupancy function Set date and time View actual fan speed 8 1 Buttons Overview 1 On Off AHU state changeover 2 Home Return button Enabling Di...

Page 33: ...s On when the AHU is in Auto mode The actual AHU state and the relative icon On Off Ventilation or Economy are based on Time Scheduler settings Heating Cooling This icon is On when the AHU is in Venti...

Page 34: ...n screen page without taking any action either press the Home button again or wait for 5 seconds 8 5 Date and time 3 To change the date and time displayed on the main screen follow these steps 1 Press...

Page 35: ...steps 1 Press the Summer Winter changeover button 2 Navigate through the different available states by pressing or buttons 3 Confirm the change of state by pressing for at least 1 second the Confirm b...

Page 36: ...it must be sealed on the device side as currents of air in the conduit can affect the sensor reading The admissible ambient conditions must be observed Local installation regulations must be observed...

Page 37: ...nt and the products and services presented therein Specification are subject to change without prior notice Refer to the data communicated at the time of the order Daikin Applied Europe S p A explicit...

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