DAIKIN D2CND028A1AB Wall-Mounted Condensing Boiler User Manual
- June 6, 2024
- Daikin
Table of Contents
D2CND028A1AB Wall-Mounted Condensing Boiler
Operation manual
Wall-mounted condensing boiler
D2CND028A1AB D2CND028A4AB D2CND035A1AB D2CND035A4AB D2TND028A4AB D2TND035A4AB
Operation manual Wall-mounted condensing boiler
English
Table of contents
Table of contents
1 Introduction
2
1.1 About the unit …………………………………………………………………. 2
1.2 About the documentation …………………………………………………. 2
1.2.1 Meaning of warnings and symbols………………………… 2
2 Safety instructions
3
2.1 Installation ……………………………………………………………………… 3
2.2 Smell of gas……………………………………………………………………. 3
2.3 Modifications on the unit…………………………………………………… 3
2.4 Gas conversion ………………………………………………………………. 3
2.5 For the user ……………………………………………………………………. 3
3 Operation
4
3.1 User interface …………………………………………………………………. 4
3.1.1 Buttons and dials ……………………………………………….. 4
3.1.2 LCD screen ……………………………………………………….. 4
3.1.3 Status indicator ………………………………………………….. 4
3.2 Operating the unit……………………………………………………………. 4
3.2.1 To switch the unit ON………………………………………….. 4
3.2.2 About the low water temperature function ……………… 4
3.2.3 About the electronic gas adaptive system calibration . 5
3.3 Basic usage……………………………………………………………………. 5
3.3.1 About the home screen……………………………………….. 5
3.3.2 To select the operation mode ………………………………. 5
3.3.3 Possible operation modes……………………………………. 5
3.3.4 Changing temperature setpoints…………………………… 6
3.3.5 Possible central heating operation modes ……………… 6
3.3.6 About the central heating ECO mode ……………………. 6
3.3.7 About the domestic hot water operation ………………… 7
3.3.8 About the domestic hot water comfort mode ………….. 7
3.3.9 About the boiler frost protection ……………………………. 7
3.3.10 About Energy Metering Function ………………………….. 7
3.4 Error handling…………………………………………………………………. 7
3.5 Menu functions ……………………………………………………………….. 8
3.5.1 To use menu level 1……………………………………………. 8
3.5.2 Info menu ………………………………………………………….. 8
3.5.3 User settings menu …………………………………………….. 9
3.5.4 Installer settings menu ………………………………………… 10
4 Maintenance and cleaning
10
4.1 To clean the outer surface of the unit…………………………………. 10
5 Energy saving tips
10
6 Contact
10
7 Error codes
10
7.1 Appliance category and supply pressure ……………………………. 12
1 Introduction
DANGER Following information is only applicable for UK. If you smell gas:
Away from the building: call the National Gas Emergency Service on 0800 111
999.
L.P.G. boilers: Call the supplier’s number on the side of the gas tank.
Contact Information Homeowner Helpdesk: 0845 641 9271 Technical Helpdesk: 0845
641 9277
Daikin UK 1 The Heights Brooklands / Weybridge / Surrey KT13 0NY Tel: 0845 641 9000
1.1 About the unit
This Daikin unit is a wall-mounted gas-fired condensing boiler that can supply heat to central heating systems, as well as supply domestic hot water. Depending on settings, it is possible to use the unit solely for hot water or solely for central heating. Hot water supply type can be instantaneous or by means of a hot water storage tank. Heating only boilers do not supply domestic hot water. The type of the boiler can be recognised from the model name written on the identification label, which is located at the right cover of the unit. See table below:
Model
Type
Domestic hot water Filling loop supply
D2CND028A1AB D2CND028 Instantaneous
Internal
D2CND028A4AB D2CND028 Instantaneous
External
D2CND035A1AB D2CND035 D2CND035A4AB D2CND035
Instantaneous Instantaneous
Internal External
D2TND028A4AB D2TND028
Storage tank
External
D2TND035A4AB D2TND035
Storage tank
External
A control unit, which contains a user interface, controls the ignition, safety systems, and other actuators. User interaction is provided via that user interface, which is composed of an LCD screen, push buttons, and two dials, and which is located on the front cover of the unit.
1.2 About the documentation
The instructions contained in this document are intended to guide you through
the operation of the unit. Damage caused by nonobservance of these
instructions are not under the responsibility of Daikin. The original
documentation is written in English. All other
languages are translations. The precautions described in this document are
written for users
and cover very important topics, follow them carefully. Please read the
instructions in the manual carefully, for your
safety and health. Please keep this manual for future reference throughout the
unit’s
period of use. Request the installer to inform you about the settings that he
made to configure your system.
1.2.1 Meaning of warnings and symbols
DANGER Indicates a situation that results in death or serious injury.
WARNING Indicates a situation that could result in death or serious injury.
CAUTION Indicates a situation that could result in minor or moderate injury.
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D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
NOTICE Indicates a situation that could result in equipment or property
damage.
INFORMATION Indicates useful tips or additional information.
2 Safety instructions
Always observe the following safety instructions and regulations.
2.1 Installation
WARNING Installation, service, maintenance and repair of the boiler can only
be carried out by suitably qualified competent persons, in accordance with the
applicable legislation, regulations, rules and guidelines.
WARNING The unit may only be operated with its casing properly mounted.
Otherwise, in unfavourable conditions, material damage or even injury or death
can result.
CAUTION A discharge pipe must be connected to the condensate trap in order to
prevent contact with the condensate.
In case your skin comes into contact with condensate, the contact location
should be washed with plenty of water. Condensate liquid may NEVER be used for
purposes of cleaning, watering plants, or drinking.
2.2 Smell of gas
DANGER This is a gas unit. Gas leaks might lead to poisoning and explosions.
If you smell gas: Do not use any electrical switches, including light
switches. Do not use telephones in the affected area. Do not use naked flames,
such as matches or lighters. Do not smoke. Turn off the main gas supply. Open
windows and doors. Warn other people in the building. Get out of the building.
Inform your gas supplier, service agent or other competent
person.
2.3 Modifications on the unit
DANGER Malfunctions can lead to poisoning and explosions. Never put the safety
devices out of operation, nor tamper with them so as to impair their function.
CAUTION An inappropriate modification may cause damage. Never tamper with the
boiler or other parts of the system. Never attempt to perform maintenance or
repair yourself. Call a qualified service agent.
D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler
3P469438-5M 2019.11
2 Safety instructions
CAUTION Do not use sprays, solvents, chlorinated cleaning agents, paint, and
adhesives in the vicinity of the unit. These substances can cause corrosion,
even in the flue system.
DANGER Do not damage or remove any seals on components. Only qualified persons
are allowed to alter sealed components. Do not make any modifications on:
Boiler Gas, water or power supply Flue system
2.4 Gas conversion
WARNING Never attempt to do gas conversion yourself. Only qualified persons
can do gas conversion. Contact your service agent. This unit is able to be
operated with both natural gas and LPG. The preset gas type is indicated on
the identification label of your unit. If you desire to use your unit with the
other fuel type, contact your service agent.
2.5 For the user
CAUTION Any misuse is forbidden. The manufacturer is not responsible for any
malfunctions and/or damage that may occur due to misuse. Your unit is intended
as a heater for central heating systems and for domestic hot water generation.
Any other use is considered as “misuse”. If you are not sure how to operate
the unit, contact your service agent. This appliance can be used by children
aged from 8 years and above and persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in a safe way
and understand the hazards involved. Children shall NOT play with the
appliance. Cleaning and user maintenance shall NOT be made by children without
supervision.
CAUTION Do NOT rinse the unit. This may cause electrical shock or fire.
NOTICE Do not place any objects or equipment on top of the unit. Do not sit,
climb or stand on the unit.
WARNING If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified persons in order to
avoid a hazard.
Operation manual
3
3 Operation
3 Operation
3.1 User interface
a
b
c
d
e
a Left dial b LCD screen c Right dial d Mode / Reset e Status indicator f Cancel / Back g Menu / Enter
f
g
3.1.1 Buttons and dials
The three buttons and two dials on the user interface have various functions according to different situations, which are stated in the table below:
Button/Dial Function
Mode / Reset
Mode
Description
Change mode between summer, winter, central heating only, standby and full-
off.
Reset
Reset the lockout error.
Cancel / Back
Cancel Back
Cancel changes. Go back to the parent menu.
Menu / Enter Menu Enter
Enter the menu function.
Passing on to the next level in the menu structure.
Confirm
Confirmation of changes.
Left dial
User interaction level
Central heating temperature setpoint.
This is either the central heating flow temperature, the room temperature, or
the virtual room temperature, depending on the system configuration.
Right dial
Menu level
User interaction level
Selection of info, user, service menu.
Domestic hot water temperature setpoint.
Menu level Selection parameter index.
Change parameter values.
3.1.2 LCD screen
LCD screen is the monitor of the user interface. You can see the boiler
operation mode, setpoints, information about actuators and menu parameters on
this screen.
The LCD screen has a sleeping function. After one minute of noninteraction
with the user interface, the screen darkens. Pressing any button or rotating
any dial awakens the display.
When you interact with the user interface, the LCD screen will show the home
screen of the active operation mode and the related setpoint, depending on the
system configuration (see “3.3.3 Possible operation modes” 4[ 5]).
Status icons Meaning of icons that appear on the LCD screen:
Icon
Description
Operation mode: Standby mode
Domestic hot water operation enabled Domestic hot water comfort mode is enabled
Central heating operation enabled
Room temperature
Outdoor sensor connection
Central heating ECO mode enabled
Flame Info menu
User settings menu
Service settings menu
3.1.3 Status indicator
The status indicator gives first level feedback on the operation mode and status of the boiler.
Status Standby
Description
When there is no heat demand, the status indicator shows this with a kind of
breathing pulsation of the blue and white LED.
Flame Error
At the moment flame ignites for central heating or domestic hot water, the
ring flashes to its maximum, then constantly keeps glowing during burner
operation.
The status indicator will go into error mode when a warning, lockout or
blocking error occurs (see “3.4 Error handling” 4[ 7]). During the error
condition the status indicator continuously shows the red blinking LED.
NOTICE
In warning error, the status indicator colour turns to blue while the boiler
is operating.
3.2 Operating the unit
3.2.1 To switch the unit ON
1 Connect the unit to the main power supply. 2 Press the “Mode” button for 5
seconds to switch ON the unit. 3 After that, you can select an operation mode
by pressing the
“Mode” button shortly. Use of the unit is explained in following parts of this
manual.
3.2.2 About the low water temperature function
The low water temperature function is a safety function that takes place at
first central heating operation after each power supply interruption and at
first central heating operation after each 90 days.
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D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
When this function is active, boiler operates according to a defined set value
for around 15 minutes and the icon blinks. After this function is ended,
normal operation goes on.
INFORMATION Low water temperature function is a safety function and it cannot
be disabled.
3.2.3 About the electronic gas adaptive system calibration
The electronic gas adaptive system calibrates itself in predetermined
intervals. First calibration takes place just after first burner activation
after each power ON. Calibration process duration is around 60 seconds and the
icon blinks. After calibration is ended, boiler modulates to required
capacity. Calibration process has no effect on boiler operation. Calibration
can also take place in summer mode without water tapping if proper conditions
are met. In other words, boiler may operate itself for a short duration in
summer mode even though there is no domestic hot water demand. This is an
expected behavior.
3.3 Basic usage
3.3.1 About the home screen
It is the screen that is displayed after activating the LCD screen with one of
the dials or buttons. You can use the home screen to read out settings that
are meant for daily use. What you can see on the home screen depends on your
system configuration. The following home screens may be possible: Room
temperature (Daikin room thermostat connected) Central heating set temperature
Virtual room temperature (with outdoor sensor) Domestic hot water set
temperature System pressure (at standby mode)
3.3.2 To select the operation mode
The operation mode can be changed by pressing the “Mode” button ( ).
b
(5 s)
e
a
c
(5 s)
d
a Central heating only mode b Standby mode c Summer mode d Winter mode e Full- off mode
D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
3 Operation
3.3.3 Possible operation modes
Operation mode Central heating only mode Standby mode Summer mode Winter mode
Full-off mode
Description
Only central heating operation mode is enabled.
The central heating temperature
setpoint (which setpoint is shown
depends on the system
configuration; see “3.3.5 Possible
central
heating
operation
modes” 4[ 6]) and the icon is
shown on the home screen.
The icon blinks if central heating operation is active.
Both central heating and domestic hot water operation modes are disabled.
The protection functions such as frost protection are still active at standby mode.
The home screen shows the system pressure, as well as the icon.
Only domestic hot water operation mode is enabled. Central heating operation mode is disabled. The boiler will only produce heat for domestic hot water.
The domestic hot water setpoint, and the icon is shown on the home screen.
The icon blinks if domestic hot water operation is active.
Both domestic hot water operation mode and central heating operation mode are enabled. The boiler can produce domestic hot water, as well as produce heat for central heating.
The central heating temperature
setpoint (which setpoint is shown
depends on the system
configuration; see “3.3.5 Possible
central
heating
operation
modes” 4[ 6]), and the icon, as
well as the icon are shown on the
home screen. When domestic hot
water operation is active, domestic
hot water setpoint is shown on the
home screen.
The icon blinks if domestic hot water operation is active.
The icon blinks if central heating operation is active.
Both central heating and domestic hot water operation modes are disabled.
LCD display will be darkened and will not be activated with any user interaction.
The protection functions such as frost protection are still active at fulloff mode.
Full-off mode is activated and deactivated if “Mode” button is pressed for 5 seconds while boiler is in any mode.
Operation manual
5
3 Operation
3.3.4 Changing temperature setpoints
Temperature setpoints can be changed with the Right/Left dials.
To change the central heating temperature setpoint
1 Turn the left dial while you are at the home screen. The setpoint screen
will appear as shown below and the setpoint can be adjusted by turning the
left dial. Note: The icon means you are at the setpoint screen.
2 To apply changes done, wait for 3 seconds or press the “Enter” button.
Pressing the “Cancel” button cancels the changes done.
To change the domestic hot water setpoint
1 Turn the right dial while you are at the home screen. The setpoint screen
will appear as shown below and the setpoint can be adjusted by turning the
right dial. Note: The icon means you are at the setpoint screen.
2 To apply changes done, wait for 3 seconds or press the “Enter” button.
Pressing the “Cancel” button cancels the changes done. NOTICE To be able to
change the setpoint of central heating or domestic hot water, the
corresponding operation mode must be enabled. If it is not, the related dial
has no function.
3.3.5 Possible central heating operation modes
Mode Boiler only
Combination with Daikin room thermostat (DOTT )
Boiler + outdoor sensor (Weather compensation)
Description
The case that the system only contains the boiler. No room thermostat or
outdoor sensor are connected. The central heating water temperature setpoint
is displayed. The setpoint can be adjusted with the left dial.
The icon is shown on the screen when the central heating operation mode is
enabled.
The case that Daikin room thermostat is connected to the boiler. Actual room
temperature is displayed. The room temperature setpoint can be adjusted from
the user interface by means of the left dial or from the Daikin room
thermostat.
The icon is shown on the screen instead of the icon when central heating
operation mode is enabled.
The case that outdoor sensor is connected to the boiler. In this case, the
central heating water temperature is regulated according to the outdoor
temperature. The virtual room temperature setpoint is diplayed. The virtual
room temperature setpoint can be adjusted by means of left dial. Increasing or
decreasing the setpoint value reflects to the central heating water
temperature and the room temperature, respectively.
The and icons are shown on the screen when central heating operation mode is
enabled.
NOTICE
To enable weather compensation, the heating slope value must be higher than
“0” (see “User settings menu: Parameters (short)” 4[ 9]).
INFORMATION
If an outdoor sensor is connected to the boiler together with Daikin room
thermostat, the rules of the case “Combination with Daikin room thermostat”
are applicable. The outdoor sensor only provides outdoor temperature data to
the room thermostat for water temperature calculation.
3.3.6 About the central heating ECO mode
The central heating ECO mode provides more economic central heating. Main
purpose of the ECO mode is to operate the boiler at the condensing temperature
range so to increase the efficiency. ECO mode can be activated at any central
heating operation mode explained above.
ECO mode can be enabled from the user settings menu (see “User settings menu:
Parameters (short)” 4[ 9]).
INFORMATION
ECO mode is only for central heating, it has no effect to domestic water
heating.
When central heating ECO mode is enabled, icon is shown on the screen while
the central heating operation mode is enabled.
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D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
NOTICE
In case of bad or inappropriate central heating circuit design, which causes
inadequate heat emission to the living space, activating the ECO mode may
cause capacity shortage.
3.3.7 About the domestic hot water operation
This unit supplies domestic hot water by way of a plate heat exchanger
(instantaneous) or by way of a hot water storage tank according to model of
the boiler.
If the boiler is instantaneous type, domestic hot water operation is activated
when water is being tapped. Water flow rate must be at least 2.5 l/min.
If it is storage tank type, domestic hot water operation is activated
according to storage tank temperature value.
The icon blinks when domestic hot water operation is active.
INFORMATION
Domestic hot water operation mode must be enabled for the boiler to be able to
produce domestic hot water. (i.e. summer mode or winter mode).
DANGER
For storage tank type models, domestic water temperature may increase to 70°C
due to a protective function. Possible measures are explained in installation
manual.
3.3.8 About the domestic hot water comfort mode
The domestic hot water comfort mode includes a domestic hot water pre-heat
function and a domestic hot water post-heat function. When the comfort mode is
enabled, both pre-heat and post-heat functions are enabled.
The pre-heat function is a self-learning algorithm according to which the
boiler will heat up the domestic hot water, before the tapping demand. The
algorithm is based on your personal use pattern of the last 24 hours.
Note: Independent of personal use pattern, comfort mode preheating function
could be adjusted to operate continuously from the user settings.
The post-heat function heats up the domestic hot water heat exchanger after
tapping, when the flow temperature of the boiler is below the domestic hot
water temperature setpoint.
Comfort mode can be enabled from the user settings menu (see “User settings
menu: Parameters (short)” 4[ 9]).
INFORMATION
Domestic hot water comfort mode is only valid for instantaneous type hot water
supply types.
When the domestic hot water comfort mode is enabled, the shown on the screen.
The icon blinks when the burner is on for comfort mode.
icon is
3.3.9 About the boiler frost protection
Frost protection safety system: This function protects the unit and heating
installation from frost damages. This protection activates the boiler pump
when the water temperature drops below 13°C and it activates the burner when
the water temperature drops below 8°C (factory setting). The unit keeps
running until the temperature reaches 20°C. To enable this function, the unit
must be connected to the power supply and its main gas valve must be open. Any
damage caused by frost is not covered by the warranty. Frost Protection is
enabled in all modes, including standby mode and full-off mode.
3 Operation
While frost protection is active, “Fr” and actual flow temperature are
displayed subsequently on the display.
WARNING
If the boiler is not connected to the power supply, frost protection is not
active. Consequently, the water may freeze and cause cracks. The manufacturer
is not responsible for any damage that may occur this way.
NOTICE
When not using the boiler, we strongly recommend not to cut off the electric
supply to the boiler.
3.3.10 About Energy Metering Function
INFORMATION
To be able to use energy metering function, the units has to be equipped with
the LAN adapter and the function should be activated by qualified persons.
This function provides user to read electricity and gas consumptions for
central heating and domestic hot water operations, in monthly and yearly
basis. In case the unit is not connected to internet, UH-08 error is displayed
after power on. To remove this error and activate this function, actual date
must be set from T parameters.
For detailed instructions to set actual date, see “3.5.3 User settings menu”
4[ 9] For detailed information to display consumption values, see “3.5.2 Info
menu” 4[ 8]
3.4 Error handling
When an error occurs, the normal behaviour of the user interface is interrupted, and the status of the status indicator is affected. However, be aware that not all errors have the same effect on the user interface and the status indicator.
Error Boiler operation type
User interface and status indicator
Warning Continue
The status indicator does not enter error mode if the burner is on. It turns to red when the burner is off. The LCD screen stays active and displays the error code.
Blocking Blocked, turns back The status indicator enters error
to operation if
mode. The LCD screen stays active
cause disappears and displays the error code.
Lockout Blocked and a reset is required
The status indicator enters error mode. The LCD screen stays active and displays the error code. Also, the icon starts blinking, indicating that a reset is required.
In case of a warning or a blocking error, the user interface will leave error
mode and return to the home screen when the cause of the error disappears.
In case of a lockout error, the boiler needs to be reset. Press the “Reset”
button to remove the error, if the cause of the error is gone. If the cause of
the error is still there, the user interface will enter error mode again. When
the error is solved, the user interface returns to the home screen.
If you turn any dial or press any button (except the “Reset” button) during an
error, the user interface will display the home screen. After the timeout
without any interaction, instead of darkening, the user interface will enter
error mode.
D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
Operation manual
7
3 Operation
NOTICE A table with all error codes, the reasons for their appearance, and
possible solutions, is located at the very end of this manual.
3.5 Menu functions
3.5.1 To use menu level 1
1 Press the “Menu” button while you are at home screen to go the Menu screen.
This is menu level 1 screen.
2 To switch between info, user settings and service settings, turn the left
dial.
3 To leave the menu and return to the home screen, press “Back” for 2 seconds.
When there is no user interaction for one minute, the user interface will
leave the menu and switch to the blank screen.
3.5.2 Info menu
Info menu: Parameters
The info menu ( ) covers all possible information that is made available to the end user and to the installer. This parameters are read only and cannot be changed.
A00 A01 A02 A03 A04(a) A05(a) A06 A07 A08(b) A09(b)
A10(c) A11
A12 A13 A14 F11(d)
Description (short) Actual flow temperature Actual return temperature Actual domestic hot water temperature Actual flue temperature Actual outdoor temperature Actual solar temperature Actual water pressure Actual domestic hot water flow rate Current set point of burner capacity Actual capacity of boiler in relation to nominal capacity Actual phase of the burner Status of On-Off room thermostat, indicate heat demand (HC1) Actual error code of boiler Actual fan speed (rpm/100) Current setpoint of boiler pump Fuel energy consumption / Central Heating / Last month
Unit °C °C °C °C °C °C bar l/min % %
— —
— rpm % kWh
F12(d) F13(d) F21(d) F22(d) F23(d) F31(d) F32(d) F33(d) F41(d) F42(d) F43(d)
(a) (b) (c)
(d)
Description (short)
Unit
Fuel energy consumption / Central Heating / Current month
kWh
Fuel energy consumption / Central Heating / Current Year
kWh
Electric energy consumption / Central Heating / Last month
kWh
Electric energy consumption / Central Heating / Current month
kWh
Electric energy consumption / Central Heating / Current Year
kWh
Fuel energy consumption / Domestic hot water / Last month
kWh
Fuel energy consumption / Domestic hot water / Current month
kWh
Fuel energy consumption / Domestic hot water / Current Year
kWh
Electric energy consumption / Domestic hot water / Last month
kWh
Electric energy consumption / Domestic hot water / Current month
kWh
Electric energy consumption / Domestic hot water / Current Year
kWh
Not applicable if the sensor is not connected. Maximum value for central
heating = 91% Maximum value for domestic hot water = 100% A10=0: Standby mode,
burner is not active A10=1: Start-up, preparation to ignition A10=2: Ignition
and flame stabilisation phase A10=3: Release control (burner is on, operation
phase) A10=4: Post-purge phase Applicable if energy metering is enabled.
Consumed
energy values are shown with 6 digits. The display
sequence is: parameter ID first 3 digits last 3 digits.
E.g. if 3456 kWh central heating fuel energy consumed in
current month, following screens are displayed in a
sequence of; F12 003 – 456
To use the info menu
1 Press the “Enter” button when the icon is displayed on the menu level 1
screen.
2 Select A or F parameters with the left dial.
3 Select the index number with the right dial. Press the “Back” button to
return to menu level 1 screen.
a
a a Index
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D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
3.5.3 User settings menu
User settings menu: Parameters (short)
The user settings menu ( ) comprises parameters that can be changed and
adjusted by users. You can read out and adjust the parameters according to
your preferences.
NOTICE
If you are not sure about the function of the parameter, do not change it.
Contact your service agent.
U00
U01 U02 U03
U04 U05
U06
U07
U08
U09
U10
t00(a) t01(a) t02(a) t03(a) t04(a)
Description
Unit Default Range
Summer-winter switch over temperature
°C 20 10~30
Heating slope
—
0
0~40
Central heating ECO mode
—
0
0~1
Domestic hot water comfort
—
0
0~1
mode
Domestic hot water set value °C 50 35~60
Set value for the room thermostat at day mode
°C 21 10~30
Set value for the room thermostat at reduced mode
°C 18 10~30
Set value for the flow temperature at day mode
°C 50 30~80
Set value for the flow
°C 35 30~80
temperature at reduced mode
Domestic hot water comfort
—
mode user record dependency
1 1, 2 or 24
Room temperature setpoint
°C 18 10~30
used by Daikin room thermostat
during night
Year
—
1~99
Mounth
—
1~12
Day
—
1~31
Hour
—
0~23
Minute
—
0~59
(a) Applicable if energy metering is enabled.
User settings menu: Parameters (detailed)
Description
U00 When using outdoor sensor, above this parameter value of outside temperature, the boiler senses the season as summer and does not activate central heating although there is demand. Summer-winter switching has a hysteresis of ±1ºC.
i.e: When this parameter is adjusted to 20ºC, the boiler switches to summer
mode at 21ºC and switches back to winter mode at 19ºC.
U01 This value is used when only outside sensor is connected to the boiler (No
Opentherm room thermostat connection). The parameter heating slope is
important to adapt the weather compensation to the individual heating system,
the building and the thermal insulation. The heating slope can be adjusted
from 0 to 40. The heating slope needs to be increased to increase the boiler
central heating set temperature. Colder regions require a higher heating slope
value.
Note: To activate weather compensation, the heating slope value must be higher
than “5”.
U02 Enabling / disabling central heating ECO mode.
1 = enabled, 0 = disabled
3 Operation
U03 U04 U05 U06
U07 U08
U09
U10 t00(a) t01(a) t02(a) t03(a) t04(a)
Description
Enabling / disabling domestic hot water comfort mode.
1 = enabled, 0 = disabled
Domestic hot water set value (same function that can be done via the right
dial when domestic hot water mode is enabled).
When On-Off room thermostat and outdoor sensor are both connected, this
parameter value is the virtual room temperature setpoint when there is a heat
demand.
When On-Off room thermostat and outdoor sensor are both connected, this
parameter value is the virtual room temperature setpoint when there is no heat
demand.
Note: For this parameter value to be active, reducing mode has to be enabled
by your service agent, otherwise central heating mode will not be activated
when there is no heat demand.
When On-Off room thermostat is connected and outdoor sensor is not connected,
this parameter value is the central heating water temperature setpoint when
there is a heat demand.
When On-Off Room thermostat is connected and outdoor sensor is not connected,
this parameter value is the central heating water temperature setpoint when
there is not a heat demand.
Note: For this parameter value to be active, reducing mode has to be enabled
by your service agent, otherwise central heating mode will not be activated
when there is no het demand.
If parameter is 1, comfort mode preheating will depend on the user record. It
will preheat the water according to the previous day user records.
If parameter is 2, comfort mode preheating will be independent of the user
record, and at the highest comfort level (3-star comfort according to EN
13302).
If parameter is 24, comfort mode preheating will be independent of the user
record.
Note: If you increase the comfort level, the energy consumption increases.
Room temperature setpoint used by Daikin Opentherm room thermostat during
night mode. Only visible in case Daikin Opentherm room thermostat is
connected.
The date and time are set by means of t parameters to update the LAN adapter.
This is needed in case the LAN adapter does not have internet connection.
Time and date settings is saved when menu is quitted by pressing (back)
button.
After date and time are set, UH-08 error disappears.
(a) Applicable if energy metering is enabled.
To use the user settings menu
1 Press the “Enter” button when the icon is displayed on the menu level 1
screen.
Result: You can see the parameter values on menu level 2. 2 Select U or t
parameters with the left dial.
3 Select the index with the right dial.
4 Press the “Enter” button when the parameter that you want to change is
displayed.
Result: You can see the menu level 3 screen. Up and down arrows will appear.
5 Change the parameter with the right dial.
D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
Operation manual
9
4 Maintenance and cleaning
6 Press the “Enter” button to confirm or the “Cancel” button to cancel. You
will return to menu level 2 after pressing “Enter” or “Back”
3.5.4 Installer settings menu
Only qualified persons are allowed to enter the installer settings menu.
4 Maintenance and cleaning
WARNING The boiler should be maintained by authorised persons every year.
Annual maintenance cycle is very important for safe operation of your boiler
and to ensure reliable, efficient and long lasting operation of it. Contact
your service agent for details. DANGER Incorrect maintenance and repairs can
lead to injury and material damage.
Never attempt to perform maintenance work or repairs on the unit yourself.
Contact your service agent. Especially for UK: After servicing, complete the
relevant Service Interval Record section of the Benchmark Checklist located on
the backpages of this document.
4.1 To clean the outer surface of the unit
Clean the outer surface of your boiler with a damp cloth and a little solvent-
free soap.
CAUTION Sprays, solvents or cleaning agents containing chlorine can damage the
exterior, the fittings or the control unit. Do not use them for cleaning
purposes.
5 Energy saving tips
Operating the unit in central heating ECO mode provides the most economical
central heating operation conditions.
Do not run the boiler in domestic hot water comfort mode. Domestic hot water
comfort mode involves pre- and post-heating, which is luxury, not necessity.
Close the thermostatic radiator valves when ventilating the rooms.
Operation manual
10
The largest heat loss occurs through windows and outer doors. Check windows
and doors for air-tightness. Close any blinds at night.
Do not hide radiators behind large furniture (i.e. couch, desk, etc.). Minimum
50 cm of clearance must remain, otherwise the heated air cannot be circulated
and the room will not heat up efficiently.
Do not let your room become too hot. Decreasing the room temperature during
the day saves energy.
Have your combi boiler’s maintenance performed at least annually.
Provide your building with sufficient heat insulation.
Thermostatic valves should be used. Each room should be adjusted according to
comfort conditions. For reception rooms, this is 20°C, living rooms 22°C,
kitchens 18°C and bedrooms 18°C.
Prevent radiators from getting covered by curtains.
6 Contact
Contact a local competent service agent if you have any questions regarding
the maintenance and repair of your system.
7 Error codes
Problem
Solution
10-64 Gas valve circuit error Perform reset. If problem repeats, contact your service agent.
10-65 Gas valve current error
Perform reset. If problem repeats, contact your service agent.
11-64 Ignition does not take Make sure valve on the gas line is
place
opened. Perform reset after third
unsuccessful ignition trial.
11-65 Flame stabilisation Wait for boiler’s ignition trial. fault
11-66 Flame signal loss in safety time
Perform reset after third unsuccessful ignition trial. If problem repeats, contact your service agent.
11-67 Flame loss during operation
Temporary error. Wait for boiler to re-ignite.
12-64 Ion control deviation Perform reset if needed. If problem
is too big
repeats, contact your service agent.
12-65 Ignition SCOT actuators fault does not take place
Perform reset if needed. If problem repeats, contact your service agent.
12-66 Ion base value
Perform reset. If problem repeats,
exceeds lower factory contact your service agent.
limit
12-67 Ion base value exceeds upper factory limit
Perform reset. If problem repeats, contact your service agent.
12-68 Ion base value differs Perform reset if needed. If problem
excessively from
repeats, contact your service agent.
previous value
12-69 Offset adaption at limit
Boiler continues operation but contact your service agent.
12-70 Offset adaption not Boiler continues operation but
executable
contact your service agent.
13-64 Fan speed error
Perform reset if needed. If problem repeats, contact your service agent.
13-65 Fan speed error
Perform reset. If problem repeats, contact your service agent.
D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
Problem
Solution
16-64 Flue temperature
Check flue gas discharge path.
signalise overheating Perform reset if needed. If problem
repeats, contact your service agent.
1J-64 High limit thermostat Check the valves of the radiators signalise overheating in the heating circuit.
Check the combi boiler water pressure. If it is low, fill the heating circuit with water.
Perform reset. If problem repeats, contact your service agent.
80-01 Return temperature Perform reset. If problem repeats,
sensor fault
contact your service agent.
81-01 Flow temperature sensor fault
81-65 Domestic hot water solar temperature sensor fault
Perform reset. If problem repeats, contact your service agent.
Boiler continues operation but solar sensor is defective. Contact your service
agent.
8A-46 Freeze protection
8H-64 Flow temperature steep rise
Unit does not operate if flow temperature sensor reads value less than 1°C.
Wait until the error code is removed from the screen.
Make sure radiator valves are open enough to circulate water. Your boiler will
operate again after a while. If problem repeats, contact your service agent.
8H-65 Flow-return temperature difference too much
Make sure radiator valves are open enough to circulate water. If problem repeats, contact your service agent.
E1-64 Flame detection before burner operation
E1-65 Internal SCOT system error
Perform reset. If problem repeats, contact your service agent.
Perform reset if needed. If problem repeats, contact your service agent.
E1-66 Calibration conditions No reset needed. Wait burner to
fault
restart. If problem repeats, contact
your service agent.
E1-67 Missing calibration
Perform reset. If problem repeats, contact your service agent.
E1-68 Ion base value is outside the factory limits or saved incorrectly
Perform reset. If problem repeats, contact your service agent.
E1-69 Parameter CRC error Perform reset. If problem repeats, contact your
service agent.
E1-70 Parameter CRC error Perform reset. If problem repeats, contact your
service agent.
E1-71 EK lockout failure
Permanent error. Contact your service agent.
E1-72 SCOT flame amplifier Perform reset if needed. If problem repeats, contact your service agent.
E1-73 Internal PCB error H9-01 Outside sensor fault
Perform reset if needed. If problem repeats, contact your service agent.
Boiler continues operation but outside sensor is defective. Contact your
service agent.
HC-01 Domestic hot water temperature sensor fault
Boiler continues operation but you must contact your service agent.
HJ-08 High system pressure Discharge water down to 0.8 bar. (You can bleed the
radiators.)
HJ-09 Low system pressure Increase the system pressure to 0.8 bar
D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
7 Error codes
Problem
HJ-10 Water pressure sensor fault
Solution Contact your service agent.
J6-01 Flow temperature Check the valves of the radiators
sensor overheating
in the heating circuit.
(Can be a blocking error or a lockout error)
Check the combi boiler water pressure. If it is low, fill the heating circuit with water.
J6-20 Return temperature sensor overheating
Perform reset if needed. If problem repeats, contact your service agent.
Perform reset if needed. If problem repeats, contact your service agent.
(Can be a blocking error or a lockout error)
J6-21 Return temperature is No reset needed, burner operates
higher than flow
itself after a small amount of time. If
temperature
problem repeats, contact your
service agent.
JJ-64 Flue temperature sensor fault
Perform reset. If problem repeats, contact your service agent.
U2-01 Supply voltage is below low limit
U2-01 Supply voltage is above high limit
Contact your service agent.
Your boiler will continue operation but you must contact your service agent.
U4-65 Opentherm room thermostat connection is defective
Your boiler will continue operation but Opentherm room thermostat is out of operation. Contact your service agent.
U4-66 CAN-bus timeout
U4-67 Remote reset supervision
If problem repeats, contact your service agent.
Switch off – switch on power mains. If problem repeats, contact your service
agent.
UA-64 Blocking during BCC update process
UA-65 PCB requires a BCC update
Contact your service agent. Contact your service agent.
UA-66 BCC-ID of internal EEPROM is inconsistent
Contact your service agent.
UA-67 BCC is missing
UA-68 BCC is not compatible with PCB (BCC-ID)
Contact your service agent. Contact your service agent.
UA-69 BCC is not
Contact your service agent.
compatible with PCB
(firmware)
UA-70 BCC update error Contact your service agent.
UH-08 Date and time are not If energy metering function is
set
interrupted or not started, date and
time must be set to resume. Set the
date and time from t parameters
(“3.5.3 User settings menu” 4[ 9])
Operation manual
11
7 Error codes 7.1 Appliance category and supply pressure
GAS BOILER SYSTEM COMMISSIONING CHECKLIST
This Commissioning Checklist is to be completed in full by the competent
person who commissioned the boiler as a means of demonstrating compliance with
the appropriate Building Regulations and then handed to the customer to keep
for future reference.
CONTROLS
Automatic bypass to system Boiler interlock ALL SYSTEMS
CENTRAL HEATING MODE
Central heating return temperature COMBINATION BOILERS ONLY
DOMESTIC HOT WATER MODE Cold water inlet temperature CONDENSING BOILERS ONLY
ALL INSTALLATIONS
Fitted Fitted Fitted Fitted
Programmable room thermostat Optimum start control Combination Boiler
mbar
OR OR
Yes Yes
mbar
mbar OR
Yes Yes
OR
Yes
Temperature
mbar
AND
²
AND
²
Yes
Ratio Ratio
Yes Yes Yes Yes
*All installations in England and Wales must be
to Local Authority Building Control (LABC) either directly or through a
Competent Persons Scheme. A Building Regulations Compliance
will then be issued to the customer.
www.centralheating.co.uk
Operation manual
12
D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
SERVICE RECORD
It is recommended that your heating system is serviced regularly and that the
appropriate Service Interval Record is completed. Service Provider
SERVICE 01
SERVICE 02
7 Error codes
(Where Possible)
Signature
SERVICE 03
AND
² %
AND
² %
(Where Possible)
Signature
SERVICE 04
AND
² %
AND
² %
(Where Possible)
Signature
SERVICE 05
AND
² %
AND
² %
(Where Possible)
Signature
SERVICE 06
AND
² %
AND
² %
(Where Possible)
Signature
SERVICE 07
AND
² %
AND
² %
(Where Possible)
Signature
SERVICE 08
AND
² %
AND
² %
(Where Possible)
Signature
SERVICE 09
AND
² %
AND
² %
(Where Possible)
Signature
SERVICE 10
AND
² %
AND
² %
(Where Possible)
AND
² %
AND
² %
(Where Possible)
AND
² %
AND
² %
Signature
Signature
*All installations in England and Wales must be
to Local Authority Building Control (LABC) either directly or through a
Competent Persons Scheme. A Building Regulations Compliance
will then be issued to the customer.
© Heating and Hotwater Industry Council (HHIC)
www.centralheating.co.uk
D2CND028+035A1/4AB + D2TND028+035A4AB Wall-mounted condensing boiler 3P469438-5M 2019.11
Operation manual
13
Copyright 2018 Daikin
DAIKIN ISITMA VE SOUTMA SSTEMLER SAN.TC. A..
Gülsuyu Mahallesi, Fevzi Çakmak Caddesi, Burçak Sokak, No:20, 34848 Maltepe
STANBUL / TÜRKYE Tel: 0216 453 27 00
Faks: 0216 671 06 00
Çari Merkezi: 444 999 0 Web: www.daikin.com.tr
Verantwortung für Energie und Umwelt
3P469438-5M 2019.11
References
- centralheating.co
- Daikin Global | A leading air conditioning and refrigeration innovator and provider for residential,commercial and industrial applications
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