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Summary of Contents for Daikin D-AHU Professional AH-ERQ-U
- Page 1 Revision Date 06/2021 Supersede D-EOMOAH00903-21EN OPERATING MANUAL D-EOMOAH00903-21_01EN Digital AHU D-STREAM...
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Page 2: Table Of Contents
Table of Contents About this document ......................3 Revision History..........................3 Notice ............................. 3 Before starting ..........................3 Safety Information ......................... 4 Introduction ........................... 5 Basic Control System Diagnostic ................... 6 Control Functions ........................7 Main Menu screen ......................... 8 Control Source.......................... -
Page 3: About This Document
D-EOMOAH00903-21EN March 2021 First edition 1.2 Notice © 2014 Daikin Applied Europe, Cecchina, Roma. All rights reserved throughout the world . The following are trademarks or registered trademarks of their respective companies: • MicroTech 4 from Daikin Applied Europe. -
Page 4: Safety Information
Safety Information Observe all safety directions and comply with the corresponding general safety regulations in order to prevent personal injury and damage to property. • Safety devices may not be removed, bypassed or taken out of operation. • Apparatus and system components may only be used in a technically fault-free state. Faults that can affect safety must be rectified immediately. -
Page 5: Introduction
Introduction This operating manual provides the basic information that allows the control of the Daikin Air Handling Unit (AHU). AHUs are used for air conditioning and air handling in terms of temperature, humidity and CO level control. There are four types... -
Page 6: Basic Control System Diagnostic
Basic Control System Diagnostic Unit controller, extension modules and communication modules are equipped with two status LED, BSP and BUS, to indicate the operational status of the devices. The “BUS” LED indicates the status of the communication with the controller. The meaning of the two status LED is indicated below. -
Page 7: Control Functions
Control Functions This section describes the main control functions available in Daikin Air Handling Units. A typical activation sequence of the devices installed in Daikin AHU for thermoregulation control is showed below. Fresh/Exhaust Air Damper Opening Supply/Return Fan Start Heat Recovery Device... -
Page 8: Main Menu Screen
Main Menu screen Through Main Menu screen the user can access to all the information necessary for monitoring the AHU status, in addition to managing the unit operative mode. In particular, the user can: Control the AHU operative mode Change the AHU Setpoint Change the Summer/Winter state Access to the I/O overview menu Program the time scheduler... -
Page 9: Actual Mode
Value for Ctrl Source determines the priority chain among available control sources, included the Panel switch, according to the following table: 6.2 Actual Mode This item (read-only) displays the actual operating mode of the AHU. All possible operating mode are reported in the table below. -
Page 10: Unit State
6.3 Unit State This item (read-only) displays the actual state of the AHU. All possible states are reported in the table below. HMI Path: Main Menu -> Unit State Main Menu item Value Description Fire Unit State - Fire : AHU in Fire alarm state. The AHU is in this state when a “... -
Page 11: Active Setpoint
6.4 Active Setpoint Active Setpoint All actual setpoints used by the software to control AHU devices are reported in the page. In the Main Menu screen is displayed the actual setpoint used for controlled temperature HMI Path: Main Menu -> Active Setpoint Parameters Description Temperature... -
Page 12: Local Switch
6.5 Local Switch This item is used to control locally the operating mode of the AHU. NOTE! Note: Local switch must set to a value not Off or Test in order the BMS to be able to turn unit ON provided that Control Source is set to BMS. (see Control source priority chain). HMI Path: Main Menu ->... -
Page 13: Summer/Winter State
6.6 Summer/Winter state The AHU software provides several options for summer/winter changeover control: Auto Mode The controller monitors one of the several temperatures available on the AHU (Room, Return or Outside). The value of this temperature is compared with two limits (one for summer and one for winter) and, depending on the result of this comparison, the controller chooses the cool/heat state for the next period. -
Page 14: Setpoints
Parameters Value Description Su/Wi chg 1. Auto This parameter defines which mode is used to control the source 2. HMI Summer/Winter switch: 3. BMS Auto: changeover is done automatically by the AHU based 4. Pursuit* on the auto mode configuration HMI: Summer/Winter state is set manually by the HMI BMS: Summer/Winter state is set via BMS communication. - Page 15 Parameters Value Range Description Temperature: Cool 10..40 [°C] Cooling temperature setpoint. Htg/Clg (Available when direct setpoint control selected) Heat 10..40 [°C] Heating temperature setpoint. Htg/Clg (Available when direct setpoint control selected) Cool Economy Cool..40 [°C] Cooling temperature setpoint in Economy mode.
- Page 16 (Available only if pre-heating control enabled) Fan Ventilation: Supply 0..100 [%] 0..4000[Pa] 0..140000[m Fans setpoints. Return 0..100 [%] 0..4000[Pa] 0..140000[m Depending on the control type of the fan, the Supply Economy setpoint can be expressed in Percentage 0..100 [%] 0..4000[Pa] 0..140000[m Return Economy [%], Pascal [Pa], Cube meter per hour...
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Page 17: I/O Overview
6.8 I/O Overview This menu allows the user to monitor all analog/digital inputs and outputs of the controller. The list can be different for each specific AHU as it depends on the installed components of the unit which are activated during the commissioning. HMI Path: Main Menu ->... -
Page 18: Time Scheduler
6.9 Time Scheduler The time scheduler is a function that allows the user to set the time slots at which the AHU can be turned ON or OFF. If the scheduler is set, the AHU will be turned On/Off automatically by following the time slot configuration. In the next tables are reported the items of the time scheduler menu and their description. - Page 19 6.9.1 Day Scheduler By entering in each day page, normal or exception, it is possible to set up to 6 time slots. Parameter Range Function Time 1 00:00 SPECIAL CASE: this entry must always be set to 00:00! Value 1 - Off Switching command for Time 1.
- Page 20 Parameter Range Function - Passive Present value Displays whether a calendar entry is currently enabled: - Active − No calendar entry is currently enabled. − A calendar entry is currently enabled. - Date Choice-x Specifies the entry for the exception: - Range −...
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Page 21: Alarm Handling
6.10 Alarm handling This menu can be used to visualize and manage every alarm occurrence. HMI Path: Main Menu -> Alarm handling Depending on the severity of the alarm, the AHU can assume two different behaviors: Not Critical Alarm: the AHU normal functioning is not affected, reporting only on the interface the alarm condition. - Page 22 6.10.2 Alarm list Next table shows all alarm strings that appears on screen when an alarm occurs, with the respective causes and solutions list. Alarm String Description Possible causes & solutions Outside temp: Error Error condition on the outside Causes Solutions temperature sensor: Sensor not connected...
- Page 23 Alarm String Description Possible causes & solutions under Measured value under If the measured value is range range wrong replace the sensor shortd The sensor could be Disconnect the loop broken temperature sensor from the controller and measure the resistance value of the sensor.
- Page 24 Alarm String Description Possible causes & solutions Heating Pump: Heating pump possible The alarm signal of the Check the wiring connection Alarm between the input “Cooling/Heating malfunction. water pump is not coil pump alarm” (water coils connected to the controller This alarm occurs when the combined) or “Heating coil pump water pump communicate to...
- Page 25 Alarm String Description Possible causes & solutions Supply # Supply # filter Fault. Filter The filter is dirty Change the filter filter Fault dirty. # = 1,2,3,4 Filter is dirty, the fault is notified in the HMI, unit is stopped. It occurs when the measured differential pressure is greater than the fault...
- Page 26 Alarm String Description Possible causes & solutions Return fan: Differential pressure error of Causes Solutions Alarm the supply fan active or fan The differential pressure Replace transducer overload. transducer is broken. This alarm occurs when the The belt is broken Change the belt differential pressure of the return fan is too high before...
- Page 27 Alarm String Description Possible causes & solutions the digital input “Electric The Electrical heating Check if there are some airflow Heaters Overload.” device is in over problems before resetting the temperature alarm Supply press: Problem with the supply air Causes Solutions under range pressure sensor...
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Page 28: About Unit
Alarm String Description Possible causes & solutions Error on the Heat Wheel This alarm occurs when the Check the operating manual of the Heat Wheel Heat Wheel recovery device communicate to the controller (through the digital input “Heat Wheel Alarm”) that an alarm state has been detected I/O Extension... - Page 29 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 firmware version installed; D-EOMOAH00903-21_01EN 29 / 37...
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Page 30: Modbus Nodes Diagnostic And Alarms
Modbus nodes diagnostic and alarms Led # Color Manager State Meaning Alive Green Board firmware Node is powered on Hardware Error Board firmware The firmware has detected an EEPROM error. If this error occurs the Node must be removed and replaced. Contact factory. I/O Error Yellow Board firmware... -
Page 31: Node#Dp2Err
Node#DP2Err Description Differential pressure transducer #2 Notification Delay Reset type Automatic Countermeasure Check polarity of flow tubes (+/-). Check connection/integrity of transducer board Modbus nodes troubleshooting 7.6.1 Node#InOutErr interpretation Alarms Node#InOutErr on MT4 will be notified together with the specific device alarm. Below some examples of combined notification. -
Page 32: Appendix A: Room Unit Module - Pol822
Appendix A: Room Unit Module - POL822 This chapter explains the functionality of the Room Unit module (POL822) that is used to measure the room temperature and to manage basic control of the AHU, like: AHU state changeover Summer/Winter mode changeover Offset on the temperature setpoint Enabling and disabling of the “Occupancy”... -
Page 33: Display Overview
8.2 Display Overview The table below explains all the symbols available on the display: Display Meaning Room Temperature Time Actual speed of the AHU fans Day of the week 1= Monday 2= Tuesday etc… On/Off This icon is: 1. On - when the unit is in On, Ventilation or Economy state. 2. -
Page 34: Ahu On-Off (1)
8.3 AHU On-Off (1) This button allows the user to change AHU actual operating state. The user can cycle and choose all available AHU states (Auto, On, Off, Ventilation, Economy) through this menu. To change the AHU state follow these steps: 1. -
Page 35: Fan Speed Display (7)
8.7 Fan Speed Display (7) This button allows the user to view the actual percentage speed of Supply and Return fans. To display the actual percentage speed of AHU fans follow these steps: 1. Press the Fan Speed button 2. Navigate through Supply fan and Return fan (if present) visualization by pressing + or – buttons 3. - Page 36 The unit should not be mounted in recesses, shelving, behind curtains or doors or above or near direct heat sources. Avoid direct sun and draught. The conduit 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.
- Page 37 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. explicitly rejects any liability for any direct or indire ct damage, in the broadest sense, arising from or related to the use and/or interpretation of this publication.