Daikin Modular-Light AHU User manual

User Manual
Modular-Light AHU

Modular-Light AHU User Manual
2
Index
1. Unit Safety Information .................................................................................................................. 2
2. Introduction ................................................................................................................................... 2
3. User Interface Room Unit ............................................................................................................... 3
3.1 Mounting instructions ....................................................................................................................... 3
3.2 Button Overview ................................................................................................................................ 4
3.3 Display Overview ............................................................................................................................... 5
3.4 Operating instructions ....................................................................................................................... 6
3.5 Alarms .............................................................................................................................................. 11
1. Unit Safety Information
Observe all sa ety directions and comply with the corresponding general sa ety regulations in order to
prevent personal injury and damage to property.
•Sa ety devices may not be removed, bypassed or taken out o operation.
•Apparatus and system components may only be used in a technically ault- ree state. Faults that
can a ect sa ety must be recti ied immediately.
•Observe the required sa ety instructions against excessively high contact voltages.
•The plant may not be in operation i the standard sa ety devices are out o operation or i their
e ects are in luenced in some other way.
•All handling that a ects the prescribed disconnection o the protective extra-low voltage (AC 24 V)
must be avoided.
•Disconnect the supply voltage before opening the apparatus cabinet. Never work when the
power is on!
•Avoid electromagnetic and other inter erence voltages in signal and connection cables.
•Assembly and installation o system and plant components may only be per ormed in accordance
with corresponding installation instructions and instructions or use.
•Every electric part o the system must be protected against static charging: electronic components,
open printed circuit boards, reely accessible connectors and apparatus components that are
connected with the internal connection.
•All equipment that is connected to the system must be CE marked and comply with the Machine
Sa ety Directive.
2. Introduction
This manual provides basic in ormation that allows the control o the Daikin Modular-Light Air Handling
Unit (AHU). AHUs are used or air conditioning and air handling in terms o temperature, humidity and CO
2
level control.
There are two types o Modular-Light AHU, based on the direction o supply air low o the main module
seen rom the electrical panel, namely “Right-Hand Side” and “Le t-Hand Side” layouts. The coils used to
produce cooling or heating are installed in separate modules.

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3. User Interface Room Unit
This section shows the unctionalities o the user inter ace, the Room Unit module, that is used to measure
room temperature and to manage main control unctions o the unit:
-Unit state changeover
-Cool/Heat mode changeover
-Temperature control
-Fan speed control
-Occupancy mode enabling
-Date/time and time scheduler setting
-Alarms management
3.1 Mounting instructions
The Room Unit receives its power rom the connected controller via the 2-wire inter ace (low voltage,
SELV). The Room Unit must be connected to the main unit with an unscreened two-core twisted pair cable.
Following some advices or the correct mounting and operation:
-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 o air in the conduit can a ect the sensor
reading.
-The admissible ambient conditions must be observed.
CE
-
CE+
Unit Controller
CE
-
CE+
Room Unit
Twisted pair

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-Local installation regulations must be observed.
-A ter an interruption o the connection to the 2-wire inter ace, parameter initialization will restart.
NOTE! The equipment is not protected against accidental connection to AC 230 V.
3.2 Button Overview
The Room Unit inter ace has the ollowing operating elements:
(1) On/Off
• Unit state changeover
(8) Cool/Heat Mode
• Switch between Cooling (Summer) and
Heating (Winter) mode
(2) Home
• Enabling/Disabling o Occupancy mode &
main page return button
(7) Fan Speed
• Change the supply and return an speed
control mode
(3) Program
• Set date/time and time scheduler
(6) OK
• Con irm button and alarm management
(4) Minus (5) Plus
• Adjust temperature setpoint and menu navigation

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3.3 Display Overview
The table below explains all the symbols available on the display:
Display
Meaning
Room temperature value
Time
Day o the week
1= Monday
2= Tuesday
etc…
Fan speed visualization
Fan speed control mode set to Auto
On/O state o the unit.
This icon is:
1. On - when the unit is in On, Ventilation or Economy state.
2. O - when the unit is O .
3. Blinking - when the unit is in Test mode or in o state by Panel
Switch.
Unit control mode set to Auto.
The actual unit state and relative icons (On, O , Ventilation or Economy)
are based on Time Scheduler settings.
Economy mode active
Ventilation mode active
Occupancy mode active
Dehumidi ication control active
Heating mode (Winter)
Cooling mode (Summer)
Unit Cool/Heat (Summer/Winter) mode changeover set to Auto
Unit in alarm (see Alarm section or urther in o)

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Two examples o main screen display:
Economy mode, cooling Ventilation mode, heating
3.4 Operating instructions
U
nit
State
changeover
This button allows the user to change unit actual operating state. To change unit state ollow these
steps:
1. Press the On-O button
2. Navigate through the di erent available states by pressing + or – buttons:
-Auto = unit follows time scheduler settings
-On = unit on with nominal setpoints
-Off = unit off
-Ventilation = only fan active, no heat/cool control
-Economy = unit on with economy setpoints
3. Con irm the change o state by pressing or at least 1 second the OK button
4. To return to the main screen page without taking any action, either press the Home button
or wait or 5 seconds
Occupancy mode
Occupancy is a unction that allows to run the unit or ixed period even i it is “O ” via time
scheduler. This time period can be con igured during unit commissioning.
To activate/deactivate the Occupancy unction ollow these steps:
1. Press the Home button
2. Navigate through the di erent available states by pressing + or – buttons (O , On)
3. Con irm the change o state by pressing or at least 1 second the OK button
4. To return to the main screen page without taking any action, either press the Home button
again or wait or 5 seconds

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Date and Time settings
To change the date and time displayed on the main screen ollow these steps:
1. Press PROG button . Time will start blinking, then set the hour with the + and -
2. By pressing the OK button the hour is saved and minutes blink, then set minutes with + and
-
3. By pressing the OK button minutes are saved and the entire time blinks, then set the time
display ormat (12/24 hour) with + or –
4. By pressing the OK button the display ormat is saved and the year blinks, then set the
desired year with + and -
5. By pressing the OK button the year is saved and the display shows month/day, with month
blinking, then set the month with the + and -

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6. By pressing the OK button month is saved and day blinks, then set the day with the + and -
7. By pressing the OK button month and day are saved, the display returns to the time
8. By Pressing PROG button the display returns to normal view
The display automatically returns to normal view when the PROG button is not pressed within one
minute.
Time Scheduler settings
The scheduler is working with 7 weekdays and 6 switches can be set up or each day. By setting up
the switch, the user can set a time point and select one operation in Auto mode.
To set the time scheduler ollow these steps:
1. Hold PROG button to enter time scheduler setting. In time scheduler, button is used to
cancel, while OK button to con irm.
2. Pressing button + or -, the number o corresponding weekday will blink on screen. Holding
button + or -, cursor will keep moving on the weekdays in a cyclic way.
3. When cursor moves onto one weekday, pressing button will select this number or deselect
it. When one weekday is selected, the day will be displayed on screen constantly. More than one
weekday can be selected.

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4. When cursor reaches the end o the week (i.e. 7) by pressing button + or the beginning o the
week (i.e. 1) by pressing button -, all the selected weekdays will be displayed on screen with their
indicators blinking. Pressing once will con irm them all.
5. A ter the con irmation o weekdays, pressing + or - again will jump to the ollowing view. The
irst line is number o operation; the second line is time setting, the invalid time “--:--“ is used to
add a switch.
6. Press button + and - to set up time point and select an operation, and press to con irm the
input. The operation codes are the ollowing:
- = Off
-1 = On
-2 = Ventilation
-3 = Economy
In any parts o time area, press when the cursor is located on “--” without a number is
selected, the switch will be deleted, and it will go back to viewing switch.

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7. In scheduler setting, pressing button will go back to the previous page. User can press this
button to exit the setting step by step. The time scheduler setting page is automatically closed i no
operation was per ormed or 1 minute, and all changes made a ter pressing button will not be
saved.
Temperature setpoint control
The buttons + or - are used to de ine Heat/Cool temperature setpoint.
By single pressing + or - buttons on main screen, the actual setpoint is being displayed. Every other
press increases/decreases the temperature setpoint o 0.1 °C.
A long press o the + or - buttons display the actual temperature o set determined with the room
unit rom the main setpoint.
Fan speed control
This button allows the user to change actual control mode or Supply and Return an.
To change an speed control mode ollow these steps:
1. Press Ventilation button
2. Navigate through the di erent available states by pressing + or – buttons:
-Auto = unit follows nominal fan setpoints
-Speed 1* = unit follows fixed speed 1 value
-Speed 2* = unit follows fixed speed 2 value
-Speed 3* = unit follows fixed speed 3 value
3. Con irm the change o state by pressing or at least 1 second the OK button
4. To return to the main screen page either press the Home button or wait or 5 seconds
*NOTE! if unit is in “Pressure Control” mode, onl AUTO fan control mode will be available.
Cool/Heat changeover
This button allows the user to change Unit Cool/Heat state (or Summer/Winter state).
To change the Cool/Heat state ollow these steps:
1. Press the Cool/Heat changeover button

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2. Navigate through the di erent available states by pressing + or – buttons (Cool, Heat)
3. Con irm the change o state by pressing or at least 1 second the OK button
4. To return to the main screen page without taking any action, either press the Home button
or wait or 5 seconds
NOTE! When icon appears on the Room Unit main screen, the Summer/Winter change source
on the main controller has been set on Auto during commissioning phase and Summer/Winter
cannot be changed via Room Unit.
3.5 Alarms
When the alarm icon appears on the inter ace, an alarm has occurred on the unit. In order to check unit
status and actual alarm code, the user must go to the alarm code screen page.
A long press o the OK button will get the user on the alarms code screen page. Another long press o
the OK button will attempt to reset the alarm, i possible. Please contact your local Daikin service
representative i you need additional support.
The alarm code consists o our slots. The irst two represents the alarm type, with the ollowing meanings:
-FL -> Fault alarm (unit stops)
-OP -> Operation alarm (unit keeps running)
The other part o the string represents the numeric code o the alarm. For a complete list o alarm code,
check the ollowing table:
Alarm Code Alarm String Description
OP01 Filter alarm
Supply or Return ilter dirty:
di erential pressure switch o the ilters detected an high pressure
di erence pressure between input and output o the ilter. Check ilters
status.
OP02 Air quality (CO
2
)
sensor alarm
CO 2 percentage too high:
measured value o CO 2 is out the allowable range or error condition on
the air quality sensor (not connected or broken).
FL04 Supply fan alarm Error condition on Supply an:
Supply an has detected a ailure. Check an status.
FL05 Return fan alarm Error condition on Return an:
Return an has detected a ailure. Check an status.
FL06 Heating/Cooling
Coils alarm
Error condition on Heating/Cooling coils:
one or more heating/cooling coils have detected a ailure. Check their
status.
FL07 Heat Recovery freeze
alarm
Heat Recovery reeze alarm active:
unit heat recovery reeze protection has intervened to prevent damage
to the device and has turned o the unit. A ter a time period, the unit
will automatically reset the alarm and start again.

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Alarm Code Alarm String Description
FL09 Fire alarm Fire alarm active:
ire detector device detected ire presence. Unit enters ire mode.
FL11 Supply temperature
sensor fault
Supply temperature sensor error:
measured temperature out o the allowable range or error condition on
the temperature sensor (not connected or broken).
FL12 Return temperature
sensor fault
Return temperature sensor error:
measured temperature out o the allowable range or error condition on
the temperature sensor (not connected or broken).
FL13 Outside temperature
sensor fault
Outside temperature sensor error:
measured temperature out o the allowable range or error condition on
the temperature sensor (not connected or broken).
FL14
Exhaust temperature
sensor fault
Exhaust temperature sensor error:
measured temperature out o the allowable range or error condition on
the temperature sensor (not connected or broken).
FL15
Supply fan sensor
fault
Supply an pressure sensor error:
measured pressure out o the allowable range or error condition on the
pressure sensor (not connected or broken).
FL16
Return fan sensor
fault
Return an pressure sensor error:
measured pressure out o the allowable range or error condition on the
pressure sensor (not connected or broken).
The present publication is drawn up by of information only and does not constitute an offer binding upon Daikin Applied Europe S.p.A..
Daikin Applied Europe S.p.A. 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. 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 indirect damage, in the broadest sense, arising from or related to the use
and/or interpretation of this publication. All content is copyrighted by Daikin Applied Europe S.p.A..
DAIKIN APPLIED EUROPE S.p.A.
Via Piani di Santa Maria, 72 - 00072 Ariccia (Roma) - Italia
Tel: [phone] - Fax: [phone]
http://www.daikinapplied.eu