Daikin EHVH08S23DAG User manual

Operation manual
Daikin Altherma – Low temperature split English
Operation manual
Daikin Altherma – Low temperature split
EHVH04S23DAV(G)
EHVH08S23DAV(G)

Table of Contents
Operation manual
2
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
Table of Contents
1 About this document 2
2 About the system 2
2.1 Components in a typical system layout ..................................... 3
3 Operation 3
3.1 User interface: Overview ........................................................... 3
3.2 Possible screens: Overview ...................................................... 3
3.2.1 Home screen............................................................... 4
3.2.2 Main menu screen ...................................................... 4
3.2.3 Setpoint screen ........................................................... 5
3.2.4 Detailed screen with values ........................................ 5
3.3 Space heating control................................................................ 5
3.3.1 Setting the space operation mode .............................. 5
3.3.2 To change the desired room temperature................... 5
3.3.3 To change the desired leaving water temperature...... 5
3.4 Domestic hot water control........................................................ 5
3.4.1 Reheat mode .............................................................. 5
3.4.2 Scheduled mode ......................................................... 6
3.4.3 Scheduled + reheat mode........................................... 6
3.4.4 Using DHW powerful operation................................... 6
3.5 Advanced usage........................................................................ 6
3.5.1 To change the user permission level .......................... 6
3.6 Schedule screen: Example........................................................ 6
3.7 Menu structure: Overview user settings .................................... 9
3.8 Installer settings: Tables to be filled in by installer .................... 10
3.8.1 Configuration wizard ................................................... 10
3.8.2 Settings menu ............................................................. 10
4 Energy saving tips 10
5 Maintenance and service 10
5.1 Overview: Maintenance and service ......................................... 10
5.2 To find the contact/helpdesk number ........................................ 11
6 Troubleshooting 11
6.1 To display the help text in case of a malfunction....................... 11
6.2 Symptom: You are feeling too cold (hot) in your living room..... 11
6.3 Symptom: The water at the tap is too cold ................................ 11
6.4 Symptom: Heat pump failure..................................................... 11
7 Disposal 11
8 Glossary 12
1 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 operating your
system
▪ 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/support-
and-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.
Breadcrumbs
Breadcrumbs help you to locate where you are in the menu structure
of the user interface.
1To enable the breadcrumbs: In the home screen or
main menu screen, press the help button. The
breadcrumbs will appear in the top left corner of the
screen.
2To disable the breadcrumbs: Press the help button
again.
This document also mentions these breadcrumbs. Example:
1Go to [4.4]: Space heating/cooling > Operation
range.
This means:
▪ Starting from the home screen, turn the left dial
and go to Space heating/cooling.
▪ Press the left dial to enter the submenu.
▪ Turn the left dial and go to Operation range.
▪ Press the left dial to enter the submenu.
4 4.4
Operation range
Operation range
2 About the system
Depending on the system layout, the system can:
▪ Heat up a space
▪ Produce domestic hot water

3 Operation
Operation manual
3
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
2.1 Components in a typical system
layout
d
a b c
e
f
gBC A
AMain zone. Example: Living room.
BAdditional zone. Example: Bedroom.
CTechnical room. Example: Garage.
aOutdoor unit heatpump
bIndoor unit heatpump
cDomestic hot water (DHW) tank
dUser interface at the indoor unit
eUser interface used as room thermostat
fUnderfloor heating
gRadiators, heatpump convectors, or fancoil units
3 Operation
3.1 User interface: Overview
The user interface has the following components:
a
b
c
aStatus indicator
bLCD screen
cDials 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 "6.1To display the help text
in case of a malfunction"on
page11 for more information.
LCD screen
The LCD screen has a sleeping function. After a certain time of non-
interaction with the user interface, the screen darkens. Pressing any
button or rotating any dial awakens the display. The time of non-
interaction differs depending on the user permission level:
▪ User or Advanced user: 15min
▪ Installer: 1h
Dials and buttons
You use the dials and buttons:
▪ To navigate through the screens, menus and settings of the LCD
screen
▪ To set values
a b c d e
Item Description
aLeft 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.
bBack button : Press to go back 1 step in the menu structure.
cHome
button
: Press to go back to the home screen.
dHelp button : Press to show a help text related to the current
page (if available).
eRight 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.
3.2 Possible screens: Overview
The most common screens are as follows:
+
–
a
b
c
c2c1
aHome screen
bMain menu screen
cLower level screens:
c1: Setpoint screen
c2: Detailed screen with values

3 Operation
Operation manual
4
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
3.2.1 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.
6
1.6
bar
18 Feb 2018
22:19
55
18
21
45
f
i
j
h
g
e
d
a
b
c
Go through the list of the main menu.
Go to the main menu screen.
Enable/disable breadcrumbs.
21
21
The temperatures are shown in circles. If the circle is
grey, the corresponding operation (example: space
heating) is currently not active.
Item Description
Outdoor
unit
a2 a3
a1
a1 : Outdoor unit
a2 : Quiet mode active
a3 Measured ambient temperature
Indoor unit /
domestic
hot water
tank
b1
b2
b1 Indoor unit:
▪: Floor-standing indoor unit with
integrated tank
b2 Water pressure
Space
operation
mode
c▪: Cooling (not available)
▪: Heating
Disinfection
/ Powerful
d▪: Disinfection mode active
▪: Powerful operation active
Date / time eCurrent date and time
Holiday f: Holiday mode active
Main zone
g3
g1
g4
g2
g1 Heat emitter type:
▪: Underfloor heating
▪: Fancoil unit
▪: Radiator
g2 Leaving water temperature setpoint
g3 Room thermostat type:
▪: Daikin user interface used as room
thermostat
▪: External control
▪ Hidden: Leaving water temperature control
g4 Measured room temperature
Item Description
Additional
zone
h3
h1 h2
h1 Heat emitter type:
▪: Underfloor heating
▪: Fancoil unit
▪: Radiator
h2 Leaving water temperature setpoint
h3 Room thermostat type:
▪: External control
▪ Hidden: Leaving water temperature control
Domestic
hot water
i1 i2
i1
: Domestic hot water
i2 Measured tank temperature
Malfunction j or : A malfunction occurred
See "6.1To display the help text in case of a
malfunction"on page11 for more information.
3.2.2 Main menu screen
In the home screen, press to open the main menu screen.
From the main menu, you can access the different setpoint screens
and submenus.
Go through the list.
Enter the submenu.
Enable/disable breadcrumbs.
Item Description
or
Malfunctioning
Restriction: Only displayed if a malfunction
occurs.
See "6.1To display the help text in case of
a malfunction"on page11 for more
information.
Room Restriction: Only displayed if a room
thermostat is connected to the indoor unit.
Set the room temperature.
Main zone Shows the applicable symbol for your main
zone configuration.
Set the leaving water temperature for the
main zone.
Additional zone Restriction: Only displayed if there are two
leaving water temperature zones. Shows
the applicable symbol for your additional
zone configuration.
Set the leaving water temperature for the
additional zone (if present).
Space heating/
cooling
Shows the applicable symbol for your unit.
Put the unit in heating mode or cooling
mode. You cannot change the mode on
heating only models.
Tank Restriction: Only displayed if a domestic
hot water tank is present.
Set the domestic hot water tank
temperature.

3 Operation
Operation manual
5
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
Item Description
User settings Gives access to user settings such as
holiday mode and quiet mode.
Information Displays data and information about the
indoor unit.
Installer settings Restriction: Only for the installer.
Gives access to advanced settings.
Commissioning Restriction: Only for the installer.
Perform tests and maintenance.
User profile Change the active user profile.
Operation Turn heating(/cooling) functionality and
domestic hot water preparation on or off.
INFORMATION
The Operation functionality is available in two separate
locations. Example: You can enable the space heating(/
cooling) functionality from these two locations in the menu:
▪ Space heating/cooling > Operation [4.1]
▪ Operation > Space heating/cooling [C.2]
3.2.3 Setpoint screen
The setpoint screen is displayed for screens describing system
components that need a setpoint value.
Example:
▪ Room temperature screen
▪ Main zone screen
▪ Additional zone screen
▪ Tank temperature screen
a1
d+
–
d
ed
e
c
a2
b1
b2
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 cMeasured by the unit
Desired temperature dTurn the right dial to
increase/decrease.
Submenu eTurn or press the left dial to
go to the submenu.
3.2.4 Detailed screen with values
a b
aSettings
bValues
Go through the list of settings.
Confirm changes and proceed.
Change the value.
Go to the next setting.
3.3 Space heating control
3.3.1 Setting the space operation mode
About space operation modes
This unit is a heating only model. The system can heat up a space,
but NOT cool down a space.
3.3.2 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.
1Go to the [1]: Room menu.
You can read out the desired and actual room
temperature in the center of the setpoint screen.
2Turn the right dial to adjust the desired room
temperature.
3.3.3 To change the desired leaving water
temperature
INFORMATION
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.
1Go to the 2: Main zone or 3:Additional zone menu.
You can read out the desired and actual leaving
water temperature in the center of the setpoint
screen.
2Turn the right dial to adjust the desired leaving water
temperature.
3.4 Domestic hot water control
3.4.1 Reheat mode
In reheat mode the DHW tank continuously heats up to the
temperature shown on the home screen (example: 50°C).
t
60°C
00:00 07:00
50°C
15°C
40°C
14:00 21:00
1234
Tt
TtDHWtank temperature
tTime

3 Operation
Operation manual
6
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
INFORMATION
When the DHW tank mode is reheat, the risk for capacity
shortage and comfort problem is significant. In case of
frequent reheat operation, space heating function is
regularly interrupted.
3.4.2 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.
Example:
t
60°C
00:00 07:00
50°C
15°C
40°C
14:00 21:00
12345
Tt
TtDHWtank temperature
tTime
3.4.3 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:
t
Tt
60°C
00:00 07:00
50°C
45°C
15°C
14:00 21:00
35°C
1245
3
TtDHWtank temperature
tTime
3.4.4 Using DHW powerful operation
Powerful operation allows the domestic hot water to be heated by
the anti-legionella heater. Use this mode on days when there is more
hot water usage than usual.
Activate or deactivate Powerful operation as follows:
1Go to [5.2]: Tank > Powerful operation
2Turn powerful operation Off or On.
3.5 Advanced usage
The amount of information you can read out in the menu structure
depends on your user permission level:
▪ User: Standard mode
▪ Advanced user: You can read out more information
3.5.1 To change the user permission level
You can change the user permission level as follows:
1Go to [B]: User profile
2Enter the applicable code for the user permission. —
▪ Move the cursor from left to right.
▪ Browse through the list of digits and change the
selected digit.
▪ Confirm the pincode 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.
3.6 Schedule screen: Example
This example shows how to set a room temperature schedule in
heating mode for the main zone.
INFORMATION
The procedures to program other schedules are similar.
To program the schedule
Example: You want to program the following schedule:
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
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.
1Go to the schedule.
2Clear the contents of the schedule (optional).
3Program the schedule for Monday.
4Copy the schedule to the other weekdays.
5Program the schedule for Saturday and copy it to Sunday.
6Give the schedule a name.
To go to the schedule:
1Go to [1.2]: Room > Schedule.
2Set scheduling to Yes.
3Go to [1.3]: Room > Heating schedule.
To clear the contents of the schedule:
1Select the name of the current schedule.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
2Select Delete.
Edit
Delete
3Select OK to confirm.

3 Operation
Operation manual
7
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
To program the schedule for Monday:
1Select Monday.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
2Select Edit.
Delete
Copy
Edit
3Use the left dial to select an entry and edit the entry
with the right dial. You can program up to 6 actions
each day.
0
6:00
8:30
17:30
20°C
18°C
22:00
--:--
18°C
--
21°C
12 24
Mon
4Confirm the changes.
To copy the schedule to the other weekdays:
1Select Monday.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
2Select Copy.
Edit
Copy
Result: "C" is displayed next to the copied day.
3Select Tuesday.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
4Select Paste.
Copy
Paste
C
Result:
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
5Repeat this action for all other weekdays.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
—
To program the schedule for Saturday and copy it to Sunday:
1Select Saturday.
2Select Edit.
3Use the left dial to select an entry and edit the entry
with the right dial.
0
8:00
23:00
--:--
21°C
18°C
--
12 24
Sat
4Confirm the changes.
5Select Saturday.
6Select Copy.
7Select Sunday.
8Select Paste.
Result:
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
To rename the schedule:
1Select the name of the current schedule.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1

3 Operation
Operation manual
8
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
2Select the Rename option.
Delete
Rename
3Browse through the character list and confirm the
selected character.
4Confirm the new name.

3 Operation
Operation manual
9
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
3.7 Menu structure: Overview user settings
[2] Main zone
Schedule
Heating schedule
Setpoint mode
Heating WD curve
[3] Additional zone
Schedule
Heating schedule
Setpoint mode
Heating WD curve
[5] Tank
Powerful operation
Comfort setpoint
Eco setpoint
Reheat setpoint
Schedule
[8.1] Energy data
Electricity input
Produced heat
[7] User settings
Language
Time/date
Holiday
Quiet
Electricity price
Gas price
[C]Operation
Room
Space heating/cooling
Tank
[B]User profile
[7.3] Holiday
Activation
From
Till
[7.4] Quiet
Activation
Schedule
[7.5] Electricity price
High
Medium
Low
Schedule
[7.2] Time/date
Hours
Minutes
AM/PM
Year
Month
Day
Daylight savings time
Format
[8] Information
Energy data
Malfunction history
Dealer information
[1.5] Antifrost
Activation
Room setpoint
[1.6] Setpoint range
Heating minimum
Heating maximum
[1] Room
Schedule
Heating schedule
Antifrost
Setpoint range
Sensor offset
Operation
[4] Space heating/cooling
Operation mode
Operation
Operation
Setpoint screen
INFORMATION
Depending on the selected installer settings and unit type,
settings will be visible/invisible.
INFORMATION
Anti-legionella heater. In the menu structure the term
"Booster heater" is used. However, this is actually an anti-
legionella heater.

4 Energy saving tips
Operation manual
10
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
3.8 Installer settings: Tables to be
filled in by installer
3.8.1 Configuration wizard
Setting Fill in…
System
Indoor unit type (read only)
Backup heater type [9.3.1]
Domestic hot water [9.2.1]
Emergency [9.5]
Number of zones [4.5]
Backup heater
Voltage [9.3.2]
Configuration [9.3.3]
Capacity step 1 [9.3.4]
Additional capacity step 2 [9.3.5]
(if applicable)
Main zone
Emitter type [2.7]
Control [2.9]
Setpoint mode [2.4]
Schedule [2.1]
Additional zone (only if [4.5] = 1)
Emitter type [3.7]
Control (read only) [3.9]
Setpoint mode [3.4]
Schedule [3.1]
Tank
Heat up mode [5.7]
Comfort setpoint [5.3]
Eco setpoint [5.4]
Reheat setpoint [5.5]
3.8.2 Settings menu
Setting Fill in…
Main zone
Thermostat type [2.A]
Additional zone (if applicable)
Thermostat type [3.A]
Information
Dealer information [8.3]
4 Energy saving tips
Tips about room temperature
▪ Make sure the desired room temperature is NEVER too high, but
ALWAYS according to your actual needs. Each saved degree can
save up to 6% of heating costs.
▪ Do NOT increase the desired room temperature to speed up
space heating. The space will NOT heat up faster.
▪ When your system layout contains slow heat emitters (example:
under floor heating), avoid large fluctuation of the desired room
temperature and do NOT let the room temperature drop too low. It
will take more time and energy to heat up the room again.
▪ Use a weekly schedule for your normal space heating 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tank temperature
▪ Use a weekly schedule for your normal domestic hot water needs
(only in scheduled mode).
▪ Program to heat up the DHW tank to a preset value (Storage
comfort = higher DHW tank temperature) during the night,
because then space heating demand is lower.
▪ If heating up the DHW tank once at night is not sufficient,
program to additionally heat up the DHWtank to a preset value
(Storage eco = lower DHWtank temperature) during the day.
▪ 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.
▪ Program to turn ON the domestic hot water pump only during
periods of the day when instant hot water is necessary. Example:
In the morning and evening.
5 Maintenance and service
5.1 Overview: Maintenance and
service
The installer has to perform a yearly maintenance. You can find the
contact/helpdesk number via the user interface.
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.
Refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO2-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
Please contact your installer for more information.
WARNING: 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).

6 Troubleshooting
Operation manual
11
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
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 from which you purchased
the unit.
Do not use the unit until a service person confirms that the
portion from which the refrigerant leaked is repaired.
5.2 To find the contact/helpdesk
number
1Go to [8.3]: Information > Dealer information.
6 Troubleshooting
6.1 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:
1Press 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.
2Press in the error screen.
Result: A long description of the error is displayed
on the screen.
6.2 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.
If the problem recurs daily, do
one of the following:
▪ Increase (decrease) the room
temperature preset value.
▪ Adjust the room temperature
schedule.
The desired room temperature
cannot be reached.
Increase the desired leaving
water temperature in accordance
with the heat emitter type.
6.3 Symptom: The water at the tap is
too cold
Possible cause Corrective action
You ran out of domestic hot
water because of unusual high
consumption.
If you immediately need domestic
hot water, activate the DHW tank
Powerful operation. However,
this consumes extra energy.
If you can wait, overrule
(increase) the active or next
scheduled desired temperature
so that more hot water will be
produced exceptionally.
If the problems recurs daily, do
one of the following:
▪ Increase the DHW tank
temperature preset value.
▪ 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.
The desired DHWtank
temperature is too low.
6.4 Symptom: Heat pump failure
When the heat pump fails to operate, the optional backup heater and
anti-legionella heater can serve as an emergency heater and either
automatically or non-automatically take over the heat load.
▪ When auto emergency is set to Automatic and a heat pump failure
occurs, the optional backup heater will automatically take over the
heat load, and the anti-legionella heater will automatically take
over the domestic hot water production.
▪ When auto emergency is set to Manual and a heat pump failure
occurs, the domestic hot water and space heating operation will
stop and need to be recovered manually. The user interface will
then ask you to confirm whether the optional backup heater or
anti-legionella heater can take over the heat load or not.
When the heat pump fails, or will appear on the user
interface.
Possible cause Corrective action
Heat pump is damaged. See "6.1To display the help text
in case of a malfunction"on
page11.
INFORMATION
When the backup heater or anti-legionella heater takes
over the heat load, electricity consumption will be
considerably higher.
7 Disposal
NOTICE
Do not try to dismantle the system yourself: the 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.

8 Glossary
Operation manual
12
EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499572-1 – 2017.06
8 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 heatpump.

4P499572-1 2017.06
Copyright 2017 Daikin
4P499572-1 0000000Y