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3 Operation
Button/Dial
Function
Mode /
Mode
Change mode between summer,
Reset
winter, central heating only, standby
and full-off.
Reset
Reset the lockout error.
Cancel /
Cancel
Cancel changes.
Back
Back
Go back to the parent menu.
Menu / Enter Menu
Enter the menu function.
Enter
Passing on to the next level in the
menu structure.
Confirm
Confirmation of changes.
Left dial
User
Central heating temperature setpoint.
interaction
This is either the central heating flow
level
temperature, the room temperature,
or the virtual room temperature,
depending on the system
configuration.
Menu level
Selection of info, user, service menu.
Right dial
User
Domestic hot water temperature
interaction
setpoint.
level
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 non-
interaction 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
operation modes" on
page 5).
Status icons
Meaning of icons that appear on the LCD screen:
Icon
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
Network connection
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.
Operation manual
4
Description
"3.3.3 Possible
Description
Status
Standby
When there is no heat demand, the status
indicator shows this with a kind of breathing
pulsation of the blue and white LED.
Flame
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.
Error
The status indicator will go into error mode when a
warning, lockout or blocking error occurs (see
"3.4 Error handling" on
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 ON the unit
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.
When this function is active, boiler operates according to a defined
set value for around 15 minutes and the
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 pre-
determined intervals. First calibration takes place just after first
burner activation after each power ON. Calibration process duration
is around 60 seconds and the
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
D2C18ND024A5AA + D2HND012/18A5AA
Description
page 7). During the error
icon blinks. After this
icon blinks. After calibration is
Wall-mounted condensing boiler
3P469438-9H – 2018.05
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