Daikin Altherma 3 H MT ECH2O Manual

About the system

Depending on the system layout, the system can:

• Heat up a space
• Cool down a space (if a heating/cooling heat pump model is installed)
• Produce domestic hot water

Cooling is only applicable in case of reversible models.

If underfloor heating is installed in the main zone, then in cooling mode the main zone can only provide refreshment. Real cooling is then NOT allowed.

Components in a typical system layout

1. Main zone. Example: Living room.
2. Additional zone. Example: Bedroom.
3. Technical room. Example: Garage.
   1. Outdoor unit heat pump
   2. Indoor unit heat pump
   3. Energy storage tank
   4. User interface of the indoor unit
   5. Dedicated Human Comfort Interface (BRC1HHDA used as room thermostat)
   6. Underfloor heating
   7. Radiators, heat pump convectors, or fan coil units

Quick guide

User permission level

The amount of information you can read and edit in the menu structure depends on your user permission level:

• User: Standard mode
• Advanced user: You can read and edit more information

To change the user permission level

1
2	Enter the applicable pin code for the user permission level.	—
	Browse through the list of digits and change the selected digit.
	Move the cursor from left to right.
	Confirm the pin code and proceed.

User pin code

The User pin code is 0000.

Advanced user pin code

The Advanced user pin code is 1234. Additional menu items for the user are now visible.

Space heating/cooling

To turn space heating/cooling operation ON or OFF

NOTICE
Room frost protection. Even if you turn OFF space heating/cooling operation ([C.2]: Operation > Space heating/cooling), room frost protection operation –if enabled– can still activate. However, for leaving water temperature control and external room thermostat control, the protection is NOT guaranteed.

NOTICE
Water pipe freeze prevention. Even if you turn OFF space heating/cooling operation ([C.2]: Operation > Space heating/cooling), water pipe freeze prevention – if enabled– will remain active.

1	Go to [C.2]: Operation > Space heating/cooling.
2	Set operation to On or Off.

To change the desired room temperature

During room temperature control, you can use the room temperature setpoint screen to read out and adjust the desired room temperature.

1	Go to [1]: Room.
2.	Adjust the desired room temperature Actual room temperature Desired room temperature

To change the desired leaving water temperature

You can use the leaving water temperature setpoint screen to read out and adjust the desired leaving water temperature.

1	Go to [2]: Main zone or [3]: Additional zone.
2	Adjust the desired leaving water temperature. Actual leaving water temperature Desired leaving water temperature

To change the weather-dependent curve for the space heating/ cooling zones

1. Go to the applicable zone:

Zone	Go to...
Main zone – Heating	[2.5] Main zone > Heating WD curve
Main zone – Cooling	[2.6] Main zone > Cooling WD curve
Additional zone – Heating	[3.5] Additional zone > Heating WD curve
Additional zone – Cooling	[3.6] Additional zone > Cooling WD curve

2. Change the weather-dependent curve.
   There are 2 types of WD curves: slope-offset curve (default), and 2-points curve. If needed, you can change the type in [2.E] Main zone > WD curve type. The way to adjust the curve depends on the type.

Slope-offset curve

• Slope. When slope is changed, the new preferred temperature at X1 is unequally higher than the preferred temperature at X2.
  
• Offset. When offset is changed, the new preferred temperature at X1 is equally higher as the preferred temperature at X2.
  

X1, X2 Outdoor ambient temperature
Y1~Y4 Desired leaving water temperature
a WD curve before changes
b WD curve after changes
c Slope
d Offset

Possible actions on this screen
	Select slope or offset.
	Increase or decrease the slope/offset.
	When slope is selected: set slope and go to offset. When offset is selected: set offset.
	Confirm changes and return to the submenu.

2-points curve

X1, X2 Outdoor ambient temperature
Y1, Y2 Desired leaving water temperature

Possible actions on this screen
	Go through the temperatures.
	Change the temperature.
	Go to the next temperature.
	Confirm changes and proceed.

More information

For more information, see also:

• "Turning operation ON or OFF"
• "Space heating/cooling control"
• "Schedule screen: Example"
• "Weather-dependent curve"
• User reference guide

Domestic hot water

To turn tank heating operation ON or OFF

NOTICE
To ensure safe operation of the system, do NOT turn off DHW when space heating is required.

NOTICE
Disinfection mode. Even if you turn OFF tank heating operation ([C.3]: Operation > Tank), disinfection mode will remain active. However, if you turn it OFF while disinfection is running, an AH error occurs.

1	Go to [C.3]: Operation > Tank.
2	Set operation to On or Off.

To change the tank temperature setpoint

In Reheat only mode, you can use the tank temperature setpoint screen to read out and adjust the storage tank temperature. The resulting domestic hot water temperature depends on this setpoint as well as the actual storage tank temperature.

1	Go to [5]: Tank.
2	Adjust the domestic hot water temperature . Actual domestic hot water temperature Desired domestic hot water temperature

In other modes, you can only view the setpoint screen but not modify it.

More information

For more information, see also:

• "Turning operation ON or OFF"
• "Domestic hot water control"
• "Schedule screen: Example"
• User reference guide

Operation

Cooling is only applicable in case of reversible models.

User interface: Overview

The user interface has the following components:

1. Status indicator
2. LCD screen
3. Dials and buttons

Status indicator

The LEDs of the status indicator light up or blink to show the operating mode of the unit.

LED	Mode	Description
Blinking blue	Standby	The unit is not in operation.
Continuous blue	Operation	The unit is in operation.
Blinking red	Malfunction	A malfunction occurred. See "To display the help text in case of a malfunction" for more information.

LCD screen

The LCD screen has a sleeping function. After 15 min of non-interaction with the user interface, the screen darkens. Pressing any button or rotating any dial awakens the display.

Dials and buttons

You use the dials and buttons:

• To navigate through the screens, menus and settings of the LCD screen
• To set values
  

	Item	Description
a	Left dial	The LCD shows an arc on the left side of the display when you can use the left dial. : Turn, then press the left dial. Navigate through the menu structure. : Turn the left dial. Choose a menu item. : Press the left dial. Confirm your choice or go to a submenu.
b	Back button	: Press to go back 1 step in the menu structure.
c	Home button	: Press to go back to the home screen.
d	Help button	: Press to show a help text related to the current page (if available).
e	Right dial	The LCD shows an arc on the right side of the display when you can use the right dial. : Turn, then press the right dial. Change a value or setting, shown at the right side of the screen. : Turn the right dial. Navigate through the possible values and settings. : Press the right dial. Confirm your choice and go to the next menu item.

Menu structure: Overview user settings

Setpoint screen
(*) Only applicable for models where cooling is possible
(**) Only accessible by installer
(***) Only applicable when WLAN is installed

Depending on the selected installer settings and unit type, settings will be visible/invisible.

Possible screens: Overview

The most common screens are as follows:

1. Home screen
2. Main menu screen
3. Lower level screens:
   c1: Setpoint screen
   c2: Detailed screen with values
   c3: Screen with weather-dependent curve
   c4: Screen with schedule

Home screen

Press the button to go back to the home screen. You see an overview of the unit configuration and the room and setpoint temperatures. Only symbols applicable for your configuration are visible on the home screen.

Possible actions on this screen
			Go through the list of the main menu.
			Go to the main menu screen.
			Enable/disable breadcrumbs.

^(a) If the corresponding operation (for example: space heating) is not active, the circle is greyed out.

Main menu screen

Starting from the home screen, press ( ) or turn () the left dial to open the main menu screen. From the main menu, you can access the different setpoint screens and submenus.

1. Selected submenu

	Possible actions on this screen
	Go through the list.
	Enter the submenu.
	Enable/disable breadcrumbs.

Setpoint screen

The setpoint screen is displayed for screens describing system components that need a setpoint value.

Examples

[1] Room temperature screen

[2] Main zone screen

[3] Additional zone screen

[4] Tank temperature screen

Explanation

Possible actions on this screen
	Go through the list of the submenu.
	Go to the submenu.
	Adjust and automatically apply the desired temperature.
Item			Description
Minimum temperature limit			a1		Fixed by the unit
			a2		Restricted by the installer
Maximum temperature limit			b1		Fixed by the unit
			b2		Restricted by the installer
Current temperature			c		Measured by the unit
Desired temperature			d		Turn the right dial to increase/decrease.
Submenu			e		Turn or press the left dial to go to the submenu.

Detailed screen with values

1. Settings
2. Values
3. Selected setting and value

Example:

Possible actions on this screen
	Go through the list of settings.
	Change the value.
	Go to the next setting.
	Confirm changes and proceed.

Turning operation ON or OFF

Visual indication

Certain functionalities of the unit can be enabled or disabled separately. If a functionality is disabled, the corresponding temperature icon in the home screen will be greyed out.

Space heating/cooling operation

1. Space heating/cooling operation ON
2. Space heating/cooling operation OFF

Tank heating operation

3. Tank heating operation ON
4. Tank heating operation OFF

To turn ON or OFF

Space heating/cooling operation

NOTICE
Room frost protection. Even if you turn OFF space heating/cooling operation ([C.2]: Operation > Space heating/cooling), room frost protection operation –if enabled– can still activate. However, for leaving water temperature control and external room thermostat control, the protection is NOT guaranteed.

NOTICE
Water pipe freeze prevention. Even if you turn OFF space heating/cooling operation ([C.2]: Operation > Space heating/cooling), water pipe freeze prevention – if enabled– will remain active.

1	Go to [C.2]: Operation > Space heating/cooling.
2	Set operation to On or Off.

Tank heating operation

NOTICE
To ensure safe operation of the system, do NOT turn off DHW when space heating is required.

NOTICE
Disinfection mode. Even if you turn OFF tank heating operation ([C.3]: Operation > Tank), disinfection mode will remain active. However, if you turn it OFF while disinfection is running, an AH error occurs.

1	Go to [C.3]: Operation > Tank.
2	Set operation to On or Off.

Reading out information

To read out information

1

Go to [8]: Information.

Possible read-out information

In menu...	You can read out...
[8.1] Energy data	Produced energy, consumed electricity, and consumed gas, energy flow diagram
[8.2] Malfunction history	Malfunction history
[8.3] Dealer information	Contact/helpdesk number
[8.4] Sensors	Room, tank or domestic hot water, outside, and leaving water temperature (if applicable)
[8.5] Actuators	Status/mode of each actuator Example: Domestic hot water pump ON/OFF
[8.6] Operation modes	Current operation mode Example: Defrost/oil return mode
[8.7] About	Version information about the system
[8.8] Connection status	Information about the connection status of the unit, the room thermostat and the LAN adapter.
[8.9] Running hours	Running hours of specific system components
[8.B] Piping diagram	Real-time sensor and actuator information of the main system components

Space heating/cooling control

Setting the space operation mode

About space operation modes
Your unit can be a heating or a heating/cooling model:

• If your unit is a heating model, it can heat up a space.
• If your unit is a heating/cooling model, it can both heat up and cool down a space. You have to tell the system which operation mode to use.

To tell the system which space operation to use, you can:

You can...	Location
Check which space operation mode is currently used.	Home screen
Set the space operation mode permanently.	Main menu
Restrict automatic changeover according to a monthly schedule.

To set the space operation mode

1	Go to [4.1]: Space heating/cooling > Operation mode
2	Select one of the following options: Heating: Only heating mode Cooling: Only cooling mode Automatic: The operation mode changes automatically between heating and cooling based on the outdoor temperature. Restricted per month according to the Operation mode schedule [4.2].

To restrict automatic changeover according to a schedule Conditions: You set the space operation mode to Automatic.

1	Go to [4.2]: Space heating/cooling > Operation mode schedule.
2	Select a month.
3	For each month, select an option: Reversible: Not restricted Heating only: Restricted Cooling only: Restricted
4	Confirm the changes.

To change the desired room temperature

During room temperature control, you can use the room temperature setpoint screen to read out and adjust the desired room temperature.

1	Go to [1]: Room.
2	Adjust the desired room temperature. Actual room temperature Desired room temperature

If scheduling is on after changing the desired room temperature

• The temperature will stay the same as long as there is no scheduled action.
• The desired room temperature will return to its scheduled value whenever a scheduled action occurs.

You can avoid scheduled behaviour by (temporarily) turning off scheduling.

To turn off room temperature scheduling

1	Go to [1.1]: Room > Schedule.
2	Select No.

To change the desired leaving water temperature

The leaving water is the water that is sent to the heat emitters. The desired leaving water temperature is set by your installer in accordance with the heat emitter type. Only adjust the leaving water temperature settings in case of problems.

You can use the leaving water temperature setpoint screen to read out and adjust the desired leaving water temperature.

1	Go to [2]: Main zone or [3]: Additional zone.
2	Adjust the desired leaving water temperature. Actual leaving water temperature Desired leaving water temperature

Domestic hot water control

Reheat mode

In reheat mode the storage tank continuously heats up to the temperature shown on the home screen (example: 50°C) when the temperature drops below a certain value.

T_t Storage tank temperature
t Time

Risk of space heating capacity shortage: In case of frequent tank operation, frequent and long space heating/ cooling interruption will happen when selecting the following:
Tank > Heat up mode > Reheat only.

Scheduled reheat mode

In scheduled reheat mode the storage tank set temperature varies according to the schedule. When the tank temperature drops below the set temperature minus the heat pump ON hysteresis temperature [6-00], the tank heats up to the reheat temperature.

Example:

T_t Storage tank temperature
t Time

• At 14:00 the DHW schedule is programmed to heat up the tank to 60°C.
• At 21:00 the DHW schedule is programmed to heat up the tank to 50°C. This value is valid until 14:00 the next day.
• With the higher set temperature, in the afternoon and evening more hot water is available.
• During the morning, you consume hot water and the storage tank temperature decreases.
• When the tank temperature drops below a preset value (=set temperature – hysteresis value; example 40°C), the tank is heated up to 50°C.
• During the afternoon and evening, you consume hot water again and the DHW tank temperature decreases again.
• When the tank temperature drops below a preset value (=set temperature – hysteresis value; example 50°C), the tank is heated up to 60°C.

Using DHW powerful operation

About powerful operation
Powerful operation allows the domestic hot water to be heated by the backup heater or booster heater. Use this mode on days when there is more hot water usage than usual.

To check if powerful operation is active
If is displayed on the home screen, powerful operation is active.

Activate or deactivate Powerful operation as follows:

1	Go to [5.1]: Tank > Powerful operation
2	Turn powerful operation Off or On.

Usage example: You immediately need more hot water
You are in the following situation:

• You already consumed most of your domestic hot water.
• You cannot wait for the next scheduled action to heat up the domestic hot water tank.

Then you can activate powerful operation. The domestic hot water tank will start heating up the water to the tank temperature setpoint.

When powerful operation is active, the risk of space heating/cooling and capacity shortage comfort problems is significant. In case of frequent domestic hot water operation, frequent and long space heating/cooling interruptions will happen.

Schedule screen: Example

This example shows how to set a room temperature schedule in heating mode for the main zone.

The procedures to program other schedules are similar.

To program the schedule: overview
Example: You want to program the following schedule:

Prerequisite: The room temperature schedule is only available if room thermostat control is active. If leaving water temperature control is active, you can program the main zone schedule instead.

1. Go to the schedule.
2. (optional) Clear the content of the whole week schedule or the content of a selected day schedule.
3. Program the schedule for Monday.
4. Copy the schedule to the other weekdays.
5. Program the schedule for Saturday and copy it to Sunday.
6. Give the schedule a name.

To go to the schedule

1	Go to [1.1]: Room > Schedule.
2	Set scheduling to Yes.
3	Go to [1.2]: Room > Heating schedule.

To clear the content of the week schedule

1	Select the name of the current schedule.
2	Select Delete.
3	Select OK to confirm.

To clear the content of a day schedule

1	Select the day of which you want to clear the content. For example Friday
2	Select Delete.
3	Select OK to confirm.

To program the schedule for Monday

1	Select Monday.
2	Select Edit.
3	Use the left dial to select an entry and edit the entry with the right dial. You can program up to 6 actions each day. On the bar, a high temperature has a darker colour than a low temperature. Note: To clear an action, set its time as the time of the previous action.
4	Confirm the changes. Result: The schedule for Monday is defined. The value of the last action is valid until the next programmed action. In this example, Monday is the first day you programmed. Thus, the last programmed action is valid up to the first action of next Monday.

To copy the schedule to the other weekdays

1	Select Monday.
2	Select Copy. Result: Next to the copied day, "C" is displayed.
3	Select Tuesday.
4	Select Paste. Result:
5	Repeat this action for all other weekdays.	-

To program the schedule for Saturday and copy it to Sunday

To rename the schedule

1	Select the name of the current schedule.
2	Select Rename.
3	(optional) To delete the current schedule name, browse through the character list until ← is displayed, then press to remove the previous character. Repeat for each character of the schedule name.
4	To name the current schedule, browse through the character list and confirm the selected character. The schedule name can contain up to 15 characters.
5	Confirm the new name.

Not all schedules can be renamed.

Weather-dependent curve

What is a weather-dependent curve?

Weather-dependent operation
The unit operates 'weather dependent' if the desired leaving water or tank temperature is determined automatically by the outdoor temperature. It therefore is connected to a temperature sensor on the North wall of the building. If the outdoor temperature drops or rises, the unit compensates instantly. Thus, the unit does not have to wait for feedback by the thermostat to increase or decrease the temperature of the leaving water or tank. Because it reacts more quickly, it prevents high rises and drops of the indoor temperature and water temperature at tap points.

Advantage
Weather-dependent operation reduces energy consumption.

Weather-dependent curve
To be able to compensate for differences in temperature, the unit relies on its weather-dependent curve. This curve defines how much the temperature of the tank or leaving water must be at different outdoor temperatures. Because the slope of the curve depends on local circumstances such as climate and the insulation of the building, the curve can be adjusted by an installer or user.

Types of weather-dependent curve
There are 2 types of weather-dependent curves:

• 2-points curve
• Slope-offset curve

Which type of curve you use to make adjustments, depends on your personal preference. See "Using weather-dependent curves".

Availability
The weather-dependent curve is available for:

• Main zone - Heating
• Main zone - Cooling
• Additional zone - Heating
• Additional zone - Cooling
• Tank (only available to installers)

To operate weather dependent, correctly configure the setpoint of the main zone, additional zone or tank. See "Using weather-dependent curves".

2-points curve

Define the weather-dependent curve with these two setpoints:

• Setpoint (X1, Y2)
• Setpoint (X2, Y1)

Example

a	Selected weather dependent zone: : Main zone or additional zone heating : Main zone or additional zone cooling : Domestic hot water
X1, X2	Examples of outdoor ambient temperature
Y1, Y2	Examples of desired tank temperature or leaving water temperature. The icon corresponds to the heat emitter for that zone: : Underfloor heating : Fan coil unit : Radiator : Storage tank

Possible actions on this screen:

		Go through the temperatures.
		Change the temperature.
		Go to the next temperature.
		Confirm changes and proceed.

Slope-offset curve

Slope and offset
Define the weather-dependent curve by its slope and offset:

• Change the slope to differently increase or decrease the temperature of the leaving water for different ambient temperatures. For example, if leaving water temperature is in general fine but at low ambient temperatures too cold, raise the slope so that leaving water temperature is heated increasingly more at decreasingly lower ambient temperatures.
• Change the offset to equally increase or decrease the temperature of the leaving water for different ambient temperatures. For example, if leaving water temperature is always a bit too cold at different ambient temperatures, shift the offset up to equally increase the leaving water temperature for all ambient temperatures.

Examples
Weather-dependent curve when slope is selected:

Weather-dependent curve when offset is selected:

Item	Description
a	WD curve before changes.
b	WD curve after changes (as example): When slope is changed, the new preferred temperature at X1 is unequally higher than the preferred temperature at X2. When offset is changed, the new preferred temperature at X1 is equally higher as the preferred temperature at X2.
c	Slope
d	Offset
e	Selected weather dependent zone: : Main zone or additional zone heating : Main zone or additional zone cooling : Domestic hot water
X1, X2	Examples of outdoor ambient temperature
Y1, Y2, Y3, Y4	Examples of desired tank temperature or leaving water temperature. The icon corresponds to the heat emitter for that zone: : Underfloor heating : Fan coil unit : Radiator : Storage tank

Possible actions on this screen:

	Select slope or offset.
	Increase or decrease the slope/offset.
	When slope is selected: set slope and go to offset. When offset is selected: set offset.
	Confirm changes and return to the submenu.

Using weather-dependent curves

Configure weather-dependent curves as following:

To define the setpoint mode
To use the weather-dependent curve, you need to define the correct setpoint mode:

Go to setpoint mode...	Set the setpoint mode to...
Main zone – Heating
[2.4] Main zone > Setpoint mode	WD heating, fixed cooling OR Weather dependent
Main zone – Cooling
[2.4] Main zone > Setpoint mode	Weather dependent
Additional zone – Heating
[3.4] Additional zone > Setpoint mode	WD heating, fixed cooling OR Weather dependent
Additional zone – Cooling
[3.4] Additional zone > Setpoint mode	Weather dependent
Tank
[5.B] Tank > Setpoint mode	Restriction: Only available to installers. Weather dependent

To change the type of weather-dependent curve
To change the type for all zones (main + additional) and for the tank, go to [2.E] Main zone > WD curve type. Viewing which type is selected is also possible via:

• [3.C] Additional zone > WD curve type
• [5.E] Tank > WD curve type

Restriction: Only available to installers.

To change the weather-dependent curve

Zone	Go to...
Main zone – Heating	[2.5] Main zone > Heating WD curve
Main zone – Cooling	[2.6] Main zone > Cooling WD curve
Additional zone – Heating	[3.5] Additional zone > Heating WD curve
Additional zone – Cooling	[3.6] Additional zone > Cooling WD curve
Tank	Restriction: Only available to installers. [5.C] Tank > WD curve

Maximum and minimum setpoints
You cannot configure the curve with temperatures that are higher or lower than the set maximum and minimum setpoints for that zone or for the tank. When the maximum or minimum setpoint is reached, the curve flattens out.

To fine-tune the weather-dependent curve: slope-offset curve
The following table describes how to fine-tune the weather-dependent curve of a zone or tank:

You feel...		Fine-tune with slope and offset:
At regular outdoor temperatures...	At cold outdoor temperatures...	Slope	Offset
OK	Cold	↑	—
OK	Hot	↓	—
Cold	OK	↓	↑
Cold	Cold	—	↑
Cold	Hot	↓	↑
Hot	OK	↑	↓
Hot	Cold	↑	↓
Hot	Hot	—	↓

To fine-tune the weather-dependent curve: 2-points curve
The following table describes how to fine-tune the weather-dependent curve of a zone or tank:

You feel...		Fine-tune with setpoints:
At regular outdoor temperatures...	At cold outdoor temperatures...	Y2(a)	Y1(a)	X1(a)	X2(a)
OK	Cold	↑	—	↑	—
OK	Hot	↓	—	↓	—
Cold	OK	—	↑	—	↑
Cold	Cold	↑	↑	↑	↑
Cold	Hot	↓	↑	↓	↑
Hot	OK	—	↓	—	↓
Hot	Cold	↑	↓	↑	↓
Hot	Hot	↓	↓	↓	↓

^(a) See "2-points curve".

Energy saving tips

Tips about room temperature

• Make sure the desired room temperature is NEVER too high (in heating mode) or too low (in cooling mode), but ALWAYS according to your actual needs. Each saved degree can save up to 6% of heating/cooling costs.
• Do NOT increase/decrease the desired room temperature to speed up space heating/cooling. The space will NOT heat up/cool down faster.
• When your system layout contains slow heat emitters (example: underfloor heating), avoid large fluctuation of the desired room temperature and do NOT let the room temperature drop too low/ rise too high. It will take more time and energy to heat up/cool down the room again.
• Use a weekly schedule for your normal space heating or cooling needs. If necessary, you can easily deviate from the schedule:
• For shorter periods: You can overrule the scheduled room temperature until the next scheduled action.Example: When you have a party, or when you are leaving for a couple of hours.
• For longer periods: You can use the holiday mode.

Tips about DHW temperature

• Make sure the desired DHW temperature, reflected by storage tank temperature, is NOT too high. Example: After installation, lower the tank temperature daily by 1°C and check if you still have enough hot water.

Maintenance and service

Overview: Maintenance and service

The installer has to perform a yearly maintenance. You can find the contact/helpdesk number via the user interface.

1

Go to [8.3]: Information > Dealer information.

As end user, you have to:

• Keep the area around the unit clean.
• Keep the user interface clean with a soft damp cloth. Do NOT use any detergents.
• Regularly check if the water pressure is above 1 bar.
• Carry out a visual check of the water level inside the storage tank: Check if the red level indicator is visible. If NOT, add water to the storage tank (for details see Installer reference guide).

Refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675

Periodical inspections for refrigerant leaks may be required depending on the applicable legislation. Contact your installer for more information.

FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.

• The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas.
• Turn OFF any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit.
• Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired.

• Do NOT pierce or burn refrigerant cycle parts.
• Do NOT use cleaning materials or means to accelerate the defrosting process other than those recommended by the manufacturer.
• Be aware that the refrigerant inside the system is odourless.

NOTICE
Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO₂ equivalent.
Formula to calculate the quantity in CO₂ equivalent tonnes: GWP value of the refrigerant × total refrigerant charge [in kg]/1000
Contact your installer for more information.

Troubleshooting

Contact

For the symptoms listed below, you can try to solve the problem yourself. For any other problem, contact your installer. You can find the contact/helpdesk number via the user interface.

1

Go to [8.3]: Information > Dealer information.

To display the help text in case of a malfunction

In case of a malfunction, the following will appear on the home screen depending on the severity:

• : Error
• : Malfunction

You can get a short and a long description of the malfunction as follows:

1	Press the left dial to open the main menu and go to Malfunctioning. Result: A short description of the error and the error code is displayed on the screen.
2	Press in the error screen. Result: A long description of the error is displayed on the screen.

To check the malfunction history

Conditions: The user permission level is set to advanced end user.

1

Go to [8.2]: Information > Malfunction history.

You see a list of the most recent malfunctions.

Symptom: You are feeling too cold (hot) in your living room

Possible cause	Corrective action
The desired room temperature is too low (high).	Increase (decrease) the desired room temperature. See "To change the desired room temperature". If the problem recurs daily, do one of the following: Increase (decrease) the room temperature preset value. See the user reference guide. Adjust the room temperature schedule. See "schedule screen: Example".
The desired room temperature cannot be reached.	Increase the desired leaving water temperature in accordance with the heat emitter type. See "To change the desired leaving water temperature".
The weather-dependent curve is set incorrectly.	Adjust the weather-dependent curve. See "Weather-dependent curve".

Symptom: The water at the tap is too cold

Possible cause	Corrective action
You ran out of domestic hot water because of unusually high consumption.	If you immediately need domestic hot water, activate the tank Powerful operation. However, this consumes extra energy. See "Using DHW powerful operation". If the problems recurs daily, do one of the following: Adjust the storage tank temperature schedule. See "Schedule screen: Example".
The desired storage tank temperature is too low.

Symptom: Heat pump failure

When the heat pump fails to operate, the backup heater or boiler can serve as an emergency heater. It then takes over the heat load either automatically or by manual interaction.

• When Emergency is set to Automatic and a heat pump failure occurs, the backup heater or boiler automatically takes over the domestic hot water production and space heating.
• When Emergency is set to Manual and a heat pump failure occurs, the domestic hot water heating and space heating stops. To manually recover it via the user interface, go to the Malfunctioning main menu screen and confirm whether the backup heater can take over the heat load or not.
• Alternatively, when Emergency is set to:
  • auto SH reduced/DHW on, space heating is reduced but domestic hot water is still available.
  • auto SH reduced/DHW off, space heating is reduced and domestic hot water is NOT available.
  • auto SH normal/DHW off, space heating operates as normally but domestic hot water is NOT available.

Similarly as in Manual mode, the unit can take the full load with the backup heater or boiler if the user activates this via the Malfunctioning main menu screen.

When the heat pump fails, or will appear on the user interface.

Possible cause	Corrective action
Heat pump is damaged.	See "To display the help text in case of a malfunction".

When the backup heater takes over the heat load, electricity consumption will be considerably higher.

Symptom: The system is making gurgling noises after commissioning

Possible cause	Corrective action
There is air in the system.	Purge air from the system.(a)
Incorrect hydraulic balance.	To be performed by the installer: Perform hydraulic balancing to assure that the flow is correctly distributed between the emitters. If hydraulic balancing is not sufficient, change the pump limitation settings ([9-0D] and [9-0E] if applicable).
Various malfunctions.	Check if or is displayed on the home screen of the user interface. See "To display the help text in case of a malfunction" for more information about the malfunction.

^(a) We recommend to purge air with the air purge function of the unit (to be performed by the installer). If you purge air from the heat emitters or collectors, mind the following:

Air purging heat emitters or collectors. Before you purge air from heat emitters or collectors, check if or is displayed on the home screen of the user interface.

• If not, you can purge air immediately.
• If yes, make sure that the room where you want to purge air is sufficiently ventilated. Reason: Refrigerant might leak into the water circuit, and subsequently into the room when you purge air from the heat emitters or collectors.

Glossary

DHW = Domestic hot water
Hot water used, in any type of building, for domestic purposes.

LWT = Leaving water temperature
Water temperature at the water outlet of the unit.

Installer settings: Tables to be filled in by installer

Configuration wizard

Settings menu

Setting	Fill in...
Main zone
Ext thermostat type [2.A]
Additional zone (if applicable)
Ext thermostat type [3.A]
Information
Dealer information [8.3]

User safety instructions

Always observe the following safety instructions and regulations.

General

If you are NOT sure how to operate the unit, contact your installer.

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.

To prevent electrical shocks or fire:

• Do NOT rinse the unit.
• Do NOT operate the unit with wet hands.
• Do NOT place any objects containing water on the unit.

• Do NOT place any objects or equipment on top of the unit.
• Do NOT sit, climb or stand on the unit.

Instructions for safe operation

MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.

The appliance shall be stored so as to prevent mechanical damage and in a well-ventilated room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).

• Do NOT pierce or burn refrigerant cycle parts.
• Do NOT use cleaning materials or means to accelerate the defrosting process other than those recommended by the manufacturer.
• Be aware that the refrigerant inside the system is odourless.

• The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas.
• Turn OFF any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit.
• Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired.

Air purging heat emitters or collectors. Before you purge air from heat emitters or collectors, check if or is displayed on the home screen of the user interface.

• If not, you can purge air immediately.
• If yes, make sure that the room where you want to purge air is sufficiently ventilated.
  Reason: Refrigerant might leak into the water circuit, and subsequently into the room when you purge air from the heat emitters or collectors.

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download Daikin Altherma 3 H MT ECH2O Manual