DAIKIN EKHWET90BAV3 R32 Split Series Domestic Hot Water Tank User Manual

DAIKIN EKHWET90BAV3 R32 Split Series Domestic Hot Water Tank User Manual

About this document

Thank you for purchasing this product. Please:

• Read the documentation carefully before operating the user interface to ensure the best possible performance.
• Request the installer to inform you about the settings that he used to configure your system. Check if he has filled in the installer settings tables. If NOT, request him to do so.
• Keep the documentation for future reference.

Target audience

End users

Documentation set
This document is part of a documentation set. The complete set consists of:

General safety precautions:

• Safety instructions that you must read before installing
• Format: Paper (in the box of the indoor unit)

Operation manual:

• Quick guide for basic usage
• Format: Paper (in the box of the indoor unit)

User reference guide:

• Detailed step-by-step instructions and background information for basic and advanced usage
• Format: Digital files on http://www.daikineurope.com/supportand-manuals/product-information/

Installation manual – Outdoor unit:

• Installation instructions
• Format: Paper (in the box of the outdoor unit)

Installation manual – Indoor unit:

• Installation instructions
• Format: Paper (in the box of the indoor unit)

Installer reference guide:

• Preparation of the installation, good practices, reference data, …
• Format: Digital files on http://www.daikineurope.com/supportand-manuals/product-information

Latest revisions of the supplied documentation may be available on the regional Daikin website or via your installer.
The original documentation is written in English. All other languages are translations.

Daikin Residential Controller app

 If set up by your installer, you can use the Daikin Residential Controller app to control and monitor the status of your system. For more information, see:
http://www.onlinecontroller.daikineurope.com/

Breadcrumbs

Breadcrumbs (example: [5.1]) help you to locate where you are in the menu structure of the user interface.

1| To enable the breadcrumbs: In the home screen or main menu screen, press the help button. The breadcrumbs appear in the top left corner of the screen.|
---|---|---
2| To disable the breadcrumbs: Press the help button again.|

This document also mentions these breadcrumbs. Example:

1| Go to [5.1] : Tank> Powerful operation.|
---|---|---

This means:

1| Starting from the home screen, turn the left dial and go to Tank.}
|
---|---|---
2| Press the left dial to enter the submenu.|
3| Turn the left dial and go to Powerful operation.
|
4| Press the left dial to enter the submenu.|

User safety instructions

Always observe the following safety instructions and regulations.

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

WARNING
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.

WARNING
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.

CAUTION

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

Units are marked with the following symbol:

This means that electrical and electronic products may NOT be mixed with unsorted household waste. Do NOT try to dismantle the system yourself: the dismantling of the system, treatment of the refrigerant, of oil and of other parts MUST be done by an authorised installer and MUST comply with applicable legislation.

Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. By ensuring this product is disposed of correctly, you will help to prevent potential negative consequences for the environment and human health. For more information, contact your installer or local authority.

Batteries are marked with the following symbol:

This means that the batteries may NOT be mixed with unsorted household waste. If a chemical symbol is printed beneath the symbol, this chemical symbol means that the battery contains a heavy metal above a certain concentration.

Possible chemical symbols are: Pb: lead (>0.004%).

Waste batteries MUST be treated at a specialised treatment facility for reuse. By ensuring waste batteries are disposed of correctly, you will help to prevent potential negative consequences for the environment and human health.

Instructions for safe operation

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

WARNING
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).

WARNING

• 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.

WARNING

• 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.

About the system

Depending on the system layout, the system can:
Produce domestic hot water

Components in a typical system layout

C Technical room. Example: Garage.
a Outdoor unit heat pump
c Domestic hot water (DHW) tank
d User interface of the indoor unit

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| Go to [B]: User profile.
|
---|---|---
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.

Domestic hot water

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.
|
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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 domestic hot water temperature.

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

In other modes, you can only view the setpoint screen but not modify it. Instead, you can modify the settings for the Comfort setpoint [5.2], Eco setpoint [5.3] and Reheat setpoint [5.4].

More information

For more information, see also:

• “5.4 Turning operation ON or OFF” [48]
• “5.6 Domestic hot water control” [49]
• “5.7 Schedule screen: Example” [410]
• User reference guide

Operation

User interface: Overview

The user interface has the following components:

a LCD screen
b Dials and buttons

LCD screen

The LCD screen has a sleeping function. After 15 min of noninteraction 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

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 when the tank Operation Mode is Quick
() Only accessible by installer
() Only applicable when WLAN is installed

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

Possible screens: Overview

The most common screens are as follows:

a Home screen
b Main menu screen
c 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.
Item| Description
---|---
a| Domestic hot water
a1| | Domestic hot water
a2| | Measured tank temperature(a)
Item| Description
---|---
b| Disinfection / Powerful
| Disinfection mode active
| Powerful operation mode active
c| Emergency
| Heat pump failure and system operates in Emergency mode.
d| Current date and time
e| Outdoor / quiet mode
e1| | Measured outdoor temperature(a)
e2| | Quiet mode active
e3| | Outdoor unit
f| Indoor unit / domestic hot water tank
f| | Wall-mounted indoor unit with integrated tank
g| Holiday mode
| Holiday mode active
h| Malfunction
****| A malfunction occurred.
See “8.1 To display the help text in case of a malfunction” 4[  14] for more information.

(a) If the corresponding operation 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.

Possible actions on this screen

| Go through the list.
| Enter the submenu.
| Enable/disable breadcrumbs.
Submenu| Description
---|---
[0]| **or Malfunctioning| Restriction:** Only displayed if a malfunction occurs.

See “8.1 To display the help text in case of a malfunction” 4[  14] for more information.

[5]|       Tank| Set the domestic hot water tank temperature.
[7]| User settings| Gives access to user settings such as holiday mode and quiet mode.
[8]| Information| Displays data and information about the indoor unit.
[9]|  Installer settings| Restriction: Only for the installer.

Gives access to advanced settings.

[A]| Commissioning| Restriction: Only for the installer.

Perform tests and maintenance.

[B]|  User profile| Change the active user profile.
[C]| Operation| Turn heating/cooling functionality and domestic hot water preparation on or off.
[D]| Wireless gateway| Restriction: Only displayed if a wireless LAN (WLAN) is installed.
Contains settings needed when configuring the Daikin Residential Controller app.
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Setpoint screen

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

Example

[5] 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 (for Reheat only mode).
Submenu| e| Turn or press the left dial to go to the submenu.

Detailed screen with values

Example

a Settings
b Values
c Selected setting and value

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.

Tank heating operation

a Tank operation ON
b Tank operation OFF

To turn ON or OFF

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.
|
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2| Set operation to On or Off.|

Reading out information

To read out information

Possible read-out information

Example: Defrost/oil return mode
[8.7] About| Version information about the system
In menu…| You can read out…
---|---
[8.8] Connection status| Information about the connection status of the unit, the room thermostat and WLAN.
[8.9] Running hours| Running hours of specific system components

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

Tt DHW tank temperature
t Time

INFORMATION
When the Priority Schedule is set to DHW (refer to “5.9 Priority schedule” [413]) and the DHW tank mode is reheat at same time, the risk for capacity shortage and comfort problem is significant. In case of frequent reheat operation, space heating/cooling function is regularly interrupted.

INFORMATION
The application of hysteresis (the amount of the temperature drop that will trigger the heat up) might vary depending on whether the target temperature is within operation range of the outdoor unit. Please consult with installer or check installer reference guide.

Scheduled mode

In scheduled mode, the DHW tank produces hot water corresponding to a schedule. The best time to allow the tank to produce hot water is at night, because the space heating demand is lower.

Tt DHW tank temperature
t Time

• Initially, the DHW tank temperature is the same as the temperature of the domestic water entering the DHW tank (example: 15°C).
• At 00:00 the DHW tank is programmed to heat up the water to a preset value (example: Comfort = 60°C).
• During the morning, you consume hot water and the DHW tank temperature decreases.
• At 14:00 the DHW tank is programmed to heat up the water to a preset value (example: Eco = 50°C). Hot water is available again.
• During the afternoon and evening, you consume hot water again and the DHW tank temperature decreases again.
• At 00:00 the next day, the cycle repeats.

Scheduled + reheat mode

In scheduled + reheat mode, the domestic hot water control is the same as in scheduled mode. However, when the DHW tank temperature drops below a preset value (=reheat tank temperature – hysteresis value; example: 35°C), the DHW tank heats up until it reaches the reheat set point (example: 45°C). This ensures that a minimum amount of hot water is available at all times.

Example:

Tt Domestic hot water tank temperature
t Time

INFORMATION
The application of hysteresis (the amount of the temperature drop that will trigger the heat up) might vary depending on whether the target temperature is within operation range of the outdoor unit. Please consult with installer or check installer reference guide.

Using DHW powerful operation

About powerful operation

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|
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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 Comfort temperature.

INFORMATION
When the Priority Schedule is set to DHW (refer to “5.9 Priority schedule” [4 13]) and 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.

Powerful operation allows the domestic hot water production to be assisted by the booster heater. Use this mode on days when there is more hot water usage than usual.

Schedule screen: Example

This example shows how to set a tank heat up schedule.

To program the schedule: overview

Example: You want to program the following schedule:

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 [5.5]: Tank > Schedule|
---|---|---

To clear the content of the week schedule

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

To program the schedule for Monday

1| Select Monday.
|
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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 4 actions each day.

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

1| Select Saturday.|
---|---|---
2| Select Edit.|
3| Use the left dial to select an entry and edit the entry with the right dial.
|

4| Confirm the changes|
5| Select Saturday.|
6| Select Copy|
7| Select Sunday.|
8| Select Paste.
**Result:

**|

Weather-dependent curve

What is a weather-dependent curve?

Weather-dependent operation

The unit operates ‘weather dependent’ if the desired tank temperature is determined automatically by the outdoor temperature.
If the outdoor temperature drops or rises, the unit compensates instantly. Thus, the unit does not have to wait for feedback by the user to increase or decrease the target temperature of the tank.
Because it reacts more quickly, it prevents high rises and drops of the 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 target temperature of the tank must be at different outdoor temperatures. Because the slope of the curve depends on local circumstances such as climate and the insulation of the house, the curve can be adjusted by an installer.

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 “5.8.4 Using weather-dependent curves” [12].

Availability

The weather-dependent curve is available for:

Tank (only available to installers)

INFORMATION
To operate weather dependent, correctly configure the setpoint of the tank. See “5.8.4 Using weather-dependent curves” [412].

2-points curve

Define the weather-dependent curve with these two setpoints:

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

Example

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

Examples
Weather-dependent curve when slope is selected:

Weather-dependent curve when offset is selected:

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
X1, X2| Examples of outdoor ambient temperature
Y1, Y2,
Y3, Y4| Examples of desired tank temperature. The icon corresponds to the heat emitter for that zone:
 : Domestic hot water 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:

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 the tank, go to [5.E] Tank.

[5.E] Tank > WD curve type

Restriction: Only available to installers.

To change the weather-dependent curve

[5.C] Tank > WD curve

INFORMATION
Maximum and minimum setpoints
You cannot configure the curve with temperatures that are higher or lower than the set maximum and minimum setpoints 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 weatherdependent curve of the tank:

See “5.8.3 Slope-offset curve” [411].

To fine-tune the weather-dependent curve: 2-points curve

The following table describes how to fine-tune the weather dependent curve of the tank:

(a) See “5.8.2 2-points curve” [411].

Priority schedule

Air Conditioning or domestic hot water priority

When multiple indoor units are connected to the outdoor unit (refer
to Installer Reference Guide for details), the user can set on the user
interface for each month whether to put DHW or Air Conditioning (A/C)
as priority. This will determine how the outdoor unit will react in case
multiple indoor units requested operation at the same time:

• If DHW is set as priority, outdoor unit can decide to operate only for DHW, while A/C operation is put on hold. In this case, once DHW operation is finished, outdoor unit can switch to A/C operation.
• If A/C is set as priority, outdoor unit can decide to operate only A/ C, in which case booster heater can start for DHW production. Once A/C operation is finished, outdoor unit can switch to DHW.

To select the Priority schedule

1| Go to [5.F]: Tank > Priority schedule.|
---|---|---
2| Select which month to set.
|
3| Select the priority schedule of that month.
|

INFORMATION
If the booster heater always takes over the DHW heat load due to setting Priority schedule to AC, electricity consumption will be considerably higher. For the months where space heating/cooling is less important, it is
recommended to set the Priority schedule to DHW.

INFORMATION
If DHW is set as priority and frequent DHW operation is expected, there is risk for comfort problem due to interruption of AC operation. For the months where space heating/cooling is more important, it is recommended to set the Priority schedule to AC.

Operation mode

Choosing Operation mode for DHW

Depending on whether early booster heater operation is desired, two DHW operation modes can be chosen as follows:

• Efficient: Booster heater only allowed when outdoor unit is
  unable to perform DHW (e.g. water temperature is outside operation
  range of outdoor unit, or outdoor unit decides to only perform A/C
  operation – refer to “5.9 Priority schedule” [413])

• Quick: Booster heater is allowed either after a certain amount of time has passed since start of DHW operation (refer below) or when outdoor unit is unable to perform DHW.

Quick mode timer

When Quick mode is chosen, user can choose between 3 preset timers after which Booster heater can activate since the start of DHW operation:

• Turbo: 10 minutes
• Normal: 20 minutes
• Economic: 30 minutes

When Efficient mode is chosen, the Quick mode timer is not used.

Energy saving tips

Tips about DHW tank temperature

• Use a weekly schedule for your normal domestic hot water needs
  (ONLY in scheduled mode).

• Also, by setting the heat up action to only scheduled action, interruption to AC operation will be limited to the specific moments where space heating/cooling demand is less important.

  • Program to heat up the DHW tank to a preset value (Comfort = higher DHW tank temperature) during the night, because then space heating/cooling demand is lower (example: between 22:00 and 04:00).
  • If heating up the DHW tank once at night is NOT sufficient, program to additionally heat up the DHW tank to a preset value (Eco = lower DHW tank temperature) during the day or the time when occupants are not present (example: between 09:00 and 15:00).

• Make sure the desired DHW tank temperature is NOT too high. Example: After installation, lower the DHW 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.

Refrigerant

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

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

Please contact your installer for more information.

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

WARNING
The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).

WARNING

• 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.

WARNING

• 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.

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.|
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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.

|

WARNING
In case F3-00, there is possible risk of refrigerant leak.
Contact your installer.

To check the malfunction history

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

1| Go to [8.2]: Information > Malfunction history.|
---|---|---

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

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 “5.7 Schedule screen: Example” [410].
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 “5.8 Weatherdependent curve” [411].

Symptom: The water at the tap is too cold

you immediately need domestic hot water, activate the DHW tank Powerful operation. However, this consumes extra energy. See “5.6.4 Using DHW powerful operation” [49]. If the problems recurs daily, do one of the following:
Increase the DHW  tank temperature preset value. See the user reference guide.
Adjust the DHW  tank temperature schedule. Example: Program to additionally heat up the DHW  tank to a preset value (Eco setpoint = lower tank temperature) during the day. See “5.7  Schedule screen: Example” [410].
The desired DHW tank temperature is too low.
The thermal cut-out has tripped.| Contact your installer.

Symptom: Heat pump failure

When the heat pump fails to operate, the booster heater 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 booster heater in the tank automatically takes over the domestic hot water production.
• When Emergency is set to Manual and a heat pump failure occurs, the domestic hot water heating stops.

To manually recover it via the user interface, go to the Malfunctioning main menu screen and confirm whether the booster heater can take over the heat load or not.

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

malfunction” [14].

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

Symptom: The system is making gurgling noises after commissioning

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 “8.1 To display the help text in case of a
malfunction” [14] 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:

WARNING
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.

Disposal

NOTICE
Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery.

Glossary

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

Installer settings: Tables to be filled in by installer

Configuration wizard

System
| Indoor unit type (read only)|
Emergency [9.5]|
Booster heater capacity [9.4.1]|
Quick mode timer [9.4.3]|
Operation [9.4.4]|
Tank
| Heat up mode [5.6]|
Disinfection [5.7]|
Maximum [5.8]|
Hysteresis [5.9]|
Hysteresis [5.A]|
Comfort setpoint [5.2]|
Eco setpoint [5.3]|
Reheat setpoint [5.4]|
Setpoint mode [5.B]|
WD curve type [5.E]|
Operation modes [5.G]|

Settings menu

Information
| Dealer information [8.3]|

EKHWET90~120BAV3
R32 Split series – Domestic hot water tank
4P680075-1B – 2022.02

References

• Internet - DENV | Daikin
• Internet - DENV | Daikin
• Daikin Onecta | Daikin

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