Nibe SPLIT ACVM 27 User manual

INSTALLATION AND MAINTENANCE INSTRUCTIONSMOS GB 0923-1
NIBE™ SPLIT
031211 NIBE™ SPLIT
ACVM 270, AMS 10
LEK
LEK
LEK

LEK LEK
1
2
LEK
LEK
5
6
LEK
3
4
LEK
7
LEK
LEK
LEK

For Home Owners
General
3
Installation data 3
Information about the installation
Product information 4
Features of NIBE SPLIT 4
Principle of operation NIBE SPLIT 4
Front panel, indoor module
How to use the front panel 6
Menu types 6
Quick movement 6
Key lock 6
Comfort setting heating
General 7
Operating status 7
Changing the room temperature manually 7
Default setting 8
Readjusting the default settings 8
Comfort setting cooling
General 10
Cooling operated from the outdoor sensor in operating mode
AutoK 10
Controlling cooling mode using the room sensor 10
Comfort setting hot water
Available volume 11
Prioritizing 11
Extra Hot Water 11
Maintenance
Checking the safety valves in ACVM 270 12
Pressure gauge in ACVM 270 12
Emptying the hot water heater 12
Emptying the vessel 12
Maintenance of AMS 10 12
Saving tips 12
Dealing with comfort disruption
Operating mode "Add. heat only" 14
Emergency mode 14
Alarm indications
What happens in the event of an alarm? 15
Recommended actions 15
Acknowledging alarms 15
For the Installer
General information for the installer
Transport and storage 16
Supplied components 16
Assembly 16
Dimensioning expansion vessel 17
Manual shunting 17
Emptying the vessel 17
Recommended installation order 17
Pipe installation
General 19
System requirements 19
Dimensions and pipe connections 19
Pump capacity diagram 19
Connecting the climate system 19
Connecting the hot water heater 20
Connection of external heat source 20
Waste exchanger part 20
Connecting refrigerant pipes (not supplied) 21
Dockings 24
Electrical installation
General 27
Electrical components 27
Connecting the supply 28
Miniature circuit-breaker 28
Temperature limiter 28
Connection between ACVM 270 and AMS 10 28
Setting max power, electrical addition 29
Setting max boiler temperature 29
EBV board, terminal and wiring diagram 29
Connecting the outside sensor 29
Connecting the current limiter 29
Connection of centralised load control/tariff 29
Connecting external contacts 30
Alarm outputs 30
Docking specific connection 30
Start-up and inspection
Preparations 31
Commissioning 31
Setting system flow heating 31
Setting system flow cooling 31
Commissioning ACVM 270 without AMS 10 connected 32
Checking external addition with internal immersion heater
blocked 32
Checking external addition (not controlled by ACVM 270) with
internal immersion heater as backup 32
Inspection of the installation 32
Cleaning the particle filter 32
Secondary adjustment 32
Checklist: Checks before commissioning 33
Miscellaneous
Control
Display 34
Menu types 34
Menu management 34
Menu tree 35
Main menus 43
1.0 [N] Hot water temp. 44
2.0 [N] Supply temp. 45
3.0 [N] Supply temp. 2 47
4.0 [N] Outdoor temp. 48
5.0 [N] Heat pump 48
6.0 [N] Room temperature 49
1NIBE™ SPLIT
Table of Contents

7.0 [N] Clock 50
8.0 [N] Other adjustments 51
9.0 [S] Service menus 52
Alarm list
Alarm with automatic reset 58
Temperature limiter alarm 58
ACVM 270 alarm 58
AMS 10 alarm 59
Hot water alarm 61
Supply alarm 61
Outdoor sensor alarm 61
Electrical circuit diagram
ACVM 270 62
AMS 10 67
Temperature sensor
Sensor placement 68
Data for sensor in AMS 10 68
Data for sensor in ACVM 270 68
Component positions
Indoor unit 69
Outdoor unit 71
Dimensions
Indoor unit 72
Outdoor unit 73
Technical specifications
Performance 75
Sound pressure levels 76
Accessories
Accessories 77
Safety precautions
Caution 78
Care 78
Especially for units intended for R410A 79
Item register 80
NIBE™ SPLIT2
Table of Contents

General
NIBE SPLIT is a system for heating, cooling and producing hot water for small houses. The system consists of an outdoor module
(AMS 10), which utilises the energy in the outdoor air and sends it to the indoor module (ACVM 270), which takes care of the
regulation and heat distribution in the house.
In order to get the greatest benefit from the system NIBE SPLIT you should read through the For Home Owners section in this
Installation and Maintenance Instruction.
NIBE SPLIT is a quality system offering a long service life and reliable operation.
Installation data
Completed by the installation engineer when the sys-
tem is installed
Installation data and installation check list on page 33 must
be filled in by the installer in order for the warranty to apply.
The Serial number must always be stated in all correspondence with NIBE.
Outdoor unit:___________Indoor unit:______________
Installation date
Check list, page 33, filled in
Installation engineers
Heating
Radiator Floor Fan convector
Cooling
Other Floor Fan convector Not available
External heat source
Solar Gas Oil Wood Pellets Electricity
Accessories
Drain pan heater RE 10 RG 10 ESV22 VCC22 ACK22
Settings
Enter deviations from default settings.
Set-
ting
MenuSettingMenu
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
Date ________ Signed ______________________________
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
Rights to make any design or technical modifications are reserved.
©NIBE 2008.
3NIBE™ SPLIT
For Home Owners
General

Information about the installation
Product information
NIBE SPLIT is a complete modern heat pump system that of-
fers effective technical energy saving and reduced carbon
dioxide emissions. Heat production is safe and economical
with integrated hot water heater, immersion heater, circula-
tion pump and climate system in the indoor module.
The heat is retrieved from the outdoor air through an outdoor
module (AMS 10), where the refrigerant, which circulates in
a closed system, transfers the heat from the heat source
(outdoor air) to the indoor module (ACVM 270). This elimin-
ates the need for bore holes and coils in the ground.
Features of NIBE SPLIT
႑Optimal annual heating factor thanks to the inverter
controlled compressor.
႑Outdoor unit with compact dimensions.
႑Speed controlled circulation pump that supplies the heat
pump with suitable system flow.
႑Optimized operating costs. The speed of the compressor
is adjusted according to the demand.
႑Integrated coil water heater in ACVM 270.
႑Integrated clock for scheduling extra hot water and
temperature lowering/increasing the flow line temperat-
ure.
႑Prepared for control of two heating systems.
႑Integrated active cooling function.
႑Possible to connect external heat sources.
Principle of operation NIBE SPLIT
12
4
3
Function
NIBE SPLIT is a system that can produce heating, hot water
and cooling.
The principle during heating can be simplified as follows:
1. The refrigerant in AMS 10 retrieves heat from the out-
door air then compresses it, which increases the temper-
ature further.
2. The hot refrigerant (now in gas state) is routed into
ACVM 270.
3. The refrigerant releases the heat for further distribution
in the system.
4. The refrigerant (now in liquid state) is routed back to
AMS 10 and the process is repeated.
By reversing the process, thereby allowing the refrigerant in
AMS 10 to retrieve the heat from the water and release it
into the outdoor air, the heat pump can cool instead, if ne-
cessary.
ACVM 270 determines when AMS 10 is to work and not to
work, using the collated data from the temperature sensor.
In the event of extra heat demands, ACVM 270 can connect
additional heat in the form of the internal immersion heater,
or any connected external addition.
NIBE™ SPLIT4
For Home Owners
Information about the installation

Front panel, indoor module
A BI II III I II
13.43
1.0
A
50.0°C
- Scroll forward in the menu system.
- Increase the value of the selected
parameter
- Scroll back in the menu system.
- Reduce the value of the selected
parameter
- Select lower menu in the menu system.
- Parameter change activated
- Parameter change confirmed
During normal operation, the status lamp
lights green.
In the event of an alarm, it lights red.
Pressing the button takes you directly to
menu 1.0.
The change does not need to be
confirmed with the Enter button.
Pressing the button (the change does
not need to be confirmed with the enter
button).
-Current operating mode is shown in the
display.
-Further button pressing changes
operating mode.
Press the enter button to return to the
normal display mode.
For information about the various operating
modes, see the different sections regarding
comfort settings.
- Heating or cooling demand
"A" Heating mode
"B" Cooling mode
If the electrical addition is connected
”I” Electrical step 1
”II” Electrical step 2
”II” Electrical step 3
More than one electrical step can be
connected at the same time.
Additional heat symbol
Compressor symbol
Hot water temp.
Operating status
Extra hot water (XHW)
Menu 1.0
Normal mode
Switch
1
All control functions connected.
Shutdown
0
Only the circulation pump and
electrical addition (electrical step 2)
are operational.
Emergency mode
Hot water symbol
The heat pump charges hot water.
Temporary temperature increase in
progress.
Time based temperature increase in
progress, e.g. periodic.
"A"
"B"
Circulation pump symbol
Circulation pump in operation.
With two circulation pumps (requires ESV
22 accessory), the operating pump is
indicated.
Climate system symbol
Heating/cooling in progress.
Description of current display
parameter
Information symbols
Menu number
Key lock activated.
1.0
Plus button
Minus button
See the section "Control – General"
Enter button
Status lamp
See the section "Control – General"
See the section "Control – General"
- Turning clockwise (+) increases the
room temperature (if room sensors are
not used).
When the knob is turned menu 2.0 is
shown on the display and the value for
the current supply temperature
changes.
Offset heating curve
5NIBE™ SPLIT
For Home Owners
Front panel, indoor module

How to use the front panel
All the most common settings are made from the panel as
well as control computer instructions such as comfort etc.
that you require the heat pump system to fulfil.
In order for the installation to be used optimally, certain basic
settings must have been made (see page 8) and that the
installation in general is carried out according to the instruc-
tions.
Menu 1.0 (the temperature in the water heater) is
normally shown on the display.
The plus and minus buttons and the enter button are
used to scroll through the menu system as well as to
change the set value in some menus.
Menu types
Control is divided into different menu types depending on
how ”deep” into the controls you need to go.
႑Normal [N]: The settings you as a customer often
need.
႑Extended [U]: Shows all detailed menus except the
service menus.
႑Service [S]: Shows all menus.
Changing of menu type is done from menu 8.1.1
Quick movement
To quickly return to the main menu from a sub menu,
press one of the following buttons:
Key lock
A key lock can be activated in the main menus by simultan-
eously pressing the plus and the minus buttons. The key
symbol will then be shown on the display.
The same procedure is used to deactivate the key lock.
NIBE™ SPLIT6
For Home Owners
Front panel, indoor module

Comfort setting heating
General
The indoor temperature depends on several factors.
႑Sunlight and heat emissions from people and household
machines are normally sufficient to keep the house warm
during the warmer parts of the year.
႑When it gets colder outside, the heating system must be
started. The colder it is outside, the warmer radiators and
under floor heating systems must be.
Controlling heat production
Normally, the heat pump heats the water (heating medium)
to the temperature required at a certain outdoor temperat-
ure. This occurs automatically on the basis of the collected
temperature values from the outdoor sensor and sensors on
the lines to the heating system (flow line sensors). Extra ac-
cessories such as room sensors, can influence the temperat-
ure.
However, the correct default settings must be made on the
heat pump first, see the section “Default settings”.
The temperature information that the outdoor sensor
(mounted on an exterior wall of the house) sends to the heat
pump’s control computer senses variations in the outdoor
temperature early on. It does not have to be cold inside the
house before the control system is activated, as soon as the
temperature drops outside, the temperature of the water to
the heating system (supply temp.) inside the house is in-
creased automatically .
The heat pumps flow temperature (menu 2.0) will hover
around the theoretical required value, which is in brackets
on the display.
Temperature of the heating system
The temperature of the heating system in relation to the
outdoor temperature can be determined by you by selecting
a heat curve and by using the ”Offset heat curve” knob on
the heat pump’s front panel.
Operating status
The “Operating mode” button is used to set the required
operating mode with regard to permitting/blocking the
circulation pump and additional energy.
The change does not need to be confirmed with the enter
button.
The current operating mode is shown on the front panel
display when the button is pressed and the mode changes
when you continue to press the button.
The display returns to the normal display mode once the
enter button is pressed.
The addition is only used for anti-freeze if it is deactivated
in the menu system, for all operating modes.
The different operating modes are:
1. ”Auto”
႑ACVM 270 automatically selects the operating mode
by taking the outdoor temperature into account. This
means that the operating mode switches between
"Heating" and "Hot water". Current operating mode
is shown within brackets.
႑The circulation pump is permitted to operate when
there is a need.
2. ”AutoK”*
႑ACVM 270 selects operating mode automatic (cool-
ing can also be selected now) with regard to the
outdoor temperature. This means that the operating
mode switches between "Heating", "Cooling" and
"Hot water".
႑The circulation pump is permitted to operate when
there is a need.
3. "Heat" / "Heat addition"
႑Only heating and cooling produced.
႑The circulation pump is in operation the entire time.
႑If "Heat addition" is shown the addition is permitted
to operate if necessary.
4. "Cooling"* / "Super cooling"
႑If addition is permitted, "Super cooling" is displayed.
The compressor then only runs in cooling mode.
Otherwise, the mode switches to cooling or produ-
cing hot water.
႑The circulation pump is in operation the entire time.
5. "Hot water"
႑Only hot water is produced.
႑Only the compressor is operational.
6. ”Only addition”
႑Compressor blocked. The function is activated by
pressing in the ”operating mode button” for 7
seconds.
* To use the cooling functions, the system must be designed
to withstand low temperatures and cooling must be activated
in menu 9.3.3.
Changing the room temperature manually
If you want to temporarily or permanently increase or lower
the indoor temperature turn the ”Offset heating curve” knob
clockwise or anticlockwise. One line approximately represents
a 1 degree change in room temperature.
NOTE
An increase in the room temperature may be inhibited
by the radiator or underfloor heating thermostats, if
so these must be turned up.
7NIBE™ SPLIT
For Home Owners
Comfort setting heating

Default setting
The basic heating is set using menu 2.1.2 and with the
“Heating curve offset” knob.
If the required room temperature is not obtained, readjust-
ment may be necessary.
If you do not know the correct settings use the basic data
from the automatic heating control system diagram opposite.
Offset heating curve
Heating curve
2.1.2
9
Menu 2.1.2 Heating curve
NOTE
Wait one day between settings so that the temperat-
ures have time to stabilise.
Setting with diagrams
The diagram is based on the dimensioned outdoor temperat-
ure in the area and the dimensioned flow temperature of
the heating system. When these two values “meet”, the
heating control's curve coefficient can be read. This is set
under menu 2.1.2, "Heating curve". Limitations, which are
not in the diagrams, are included in the control system's
permitted min and max temperatures.
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
- 40 °C
UTETEMPERATUR
- 10
0
10
- 5
+ 5
30
40
50
60
70
°C
FRAMLEDNINGSTEMPERATUR
- 20 - 30
FÖRSKJUTNING
VÄRMEKURVA (-2)
VÄRMEKURVA
HEATING CURVE
OUTSIDE
TEMPERATURE
SUPPLY TEMPERATURE
OFFSET HEAT CURVE -2
30
40
50
60
70
°C
FRAMLEDNINGSTEMPERATUR
- 40 °C
UTETEMPERATUR
- 10
0
10 - 20 - 30
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
V
Ä
RMEKURVA
- 5
+ 5
FÖRSKJUTNING
VÄRMEKURVA (0)
HEATING CURVE
OUTSIDE
TEMPERATURE
SUPPLY TEMPERATURE
OFFSET HEAT CURVE 0
1514 13 12 11 10
8
7
6
5
4
3
2
1
- 40 °C
UTETEMPERATUR
- 10
0
10
- 5
+ 5
30
40
50
60
70
°C
FRAMLEDNINGSTEMPERATUR
- 20 - 30
FÖRSKJUTNING
VÄRMEKURVA (+2)
9
V
Ä
RMEKURVA
HEATING CURVE
OUTSIDE
TEMPERATURE
SUPPLY TEMPERATURE
OFFSET HEAT CURVE +2
Readjusting the default settings
If the required room temperature is not obtained, readjust-
ment may be necessary.
NIBE™ SPLIT8
For Home Owners
Comfort setting heating

Cold weather conditions
႑When the room temperature is too low, the “Heating
curve” value is increased in menu 2.1.2 by one increment.
႑When the room temperature is too high, the “Heating
curve” value is decreased in menu 2.1.2 by one incre-
ment.
Warm weather conditions
႑If the room temperature is low, increase the “Heating
curve offset” setting by one step clockwise.
႑If the room temperature is high, reduce the “Heating
curve offset” setting by one step anti-clockwise.
9NIBE™ SPLIT
For Home Owners
Comfort setting heating

Comfort setting cooling
General
The condition in order for cooling to be activated is that
"On" is selected in menu 9.3.3 Cooling system. Note! The
climate system must manage cooling operation. Settings
must be made by the installer when commissioning the sys-
tem.
If a room sensor is connected, it starts and stops cooling to-
gether with the outdoor temperature. The lowest calculated
supply temperature is set in menu 2.2.4.
Cooling operated from the outdoor sensor in
operating mode AutoK
If the cooling system is set to "On" in menu 9.3.3 and the
outdoor temperature is greater or equivalent to the set start
temperature for cooling in menu 8.2.4, cooling starts.
Cooling stops when the outdoor temperature drops below
the set value minus the set value in menu 8.2.5.
The calculated flow line temperature is determined from the
selected cooling curve in menu 2.2.2 and the offset for
cooling curve, menu 2.2.1. Limitations, which are not in the
diagram, are included in the control system's permitted min
temperature.
0
0
°C
20 °C
30
5
10
20
framledningstemp
.
Utetemp.
40
15 k=1
k=2
k=3
Calculated flow
t
emperature
Outside
temperature
Controlling cooling mode using the room sensor
If RG 10 is present, the condition for cooling is that the room
temperature has exceeded the set room temperature (menu
6.3) by the set value in menu 8.2.5 and that the outdoor
temperature is equivalent to or exceeds the set outdoor
temperature value (menu 8.2.4).
When the room temperature has dropped below the set
room temperature in menu 6.3 by the set value in menu
8.2.5 or the outdoor temperature falls below the set value
in menu 8.2.4 by the set value in menu 8.2.5, cooling
switches off.
NIBE™ SPLIT10
For Home Owners
Comfort setting cooling

Comfort setting hot water
The integrated water heater is of coil model and is heated
by circulating water, which is heated by the heat pump.
During “normal” consumption it is enough to run the heat
pump’s compressor to supply the different tapping points
of the house with hot water. The temperature of the hot
water in the water heater then varies between the set values.
Under section 1.0 [N] Hot water temp. on page 44 there is
a complete description of menu settings for hot water tem-
peratures.
Available volume
0
100
200
300
400
8 l/min
12 l/min
16 l/min
Normal
High Normal
Domestic hot water volume at different water flows, 40 °C (litre)
Savings
Comfort
level
High
Prioritizing
If the water in the heater needs heating, the heat pump pri-
oritizes this and shifts to hot water mode with the entire
heat pump output.
In this mode, there is no heating or cooling.
Prioritizing can be affected via settings in the front panel.
See "1.0 [N] Hot water temp." on page 44.
Extra Hot Water
In all ”Extra hot water” functions, the temperature of the
hot water increases temporarily. The temperature is first in-
creased to an adjustable level by the compressor (menu 1.5)
and then the electrical addition increases until the stop tem-
perature is reached (menu 1.4).
Temporary ”Extra hot water” is activated manually, whilst
time based extra hot water is activated using the settings
made in the control computer.
When:
႑”A” appears above the icon, temporary extra hot
water is active.
႑”B” appears above the icon, time based extra hot
water is active.
NOTE
”Extra hot water” usually means that the electrical
addition has been activated and therefore increases
the electrical consumption.
”Extra hot water” can be activated in three different
ways:
1. Periodic time based extra hot water
႑Interval between increases selected in menu 1.7.
Menu 1.8 shows when the next increase is due.
႑The increased temperature is maintained by the
electrical addition for one hour.
2. Schedule time based extra hot water
႑The start and stop times for the day of the week that
the increase is required are set in the sub menus to
menu 7.5.0.
႑The increased temperature is maintained by the
electrical addition for the selected period.
3. Temporary extra hot water
႑The current ”extra hot water” mode is shown on the
display (A) when the button is pressed and when you
continue to press the button the mode changes
between 3 hours and standby mode.
႑The increased temperature is maintained by the
electrical addition until the period of time has expired.
11NIBE™ SPLIT
For Home Owners
Comfort setting hot water

Maintenance
ACVM 270 and AMS 10 require minimal maintenance after
commissioning.
NIBE SPLIT contains many components and is why monitoring
functions are integrated to help you.
If something abnormal occurs, a message appears about
malfunctions in the form of different ”alarm” texts in display.
Checking the safety valves in ACVM 270
ACVM 270 has been equipped with a safety valve for the
water heater as well as a safety valve for the climate system
by the installer.
The climate system's safety valve
FL2BP5
The climate system's safety valve (FL2) must be completely
sealed. Checks must be carried out regularly as follows:
႑Open the valve.
႑Check that water flows through the valve. If this does
not happen, replace the safety valve.
႑Close the valve again.
႑The heating system may need to be refilled after checking
the safety valve, see the section “Filling the heating sys-
tem”.
Hot water heater safety valve
The water heater's safety valve sometimes releases a little
water after hot water usage. This is because the cold water,
which enters the heater to replace the hot water, expands
when heated causing the pressure to rise and the safety valve
to open.
Also check the water heater safety valve regularly. The ap-
pearance and location of the safety valve differs between
different installations. Contact your installer for information.
Pressure gauge in ACVM 270
The working range of the heating system is normally 0.5 –
1.5 bar when the system is closed. Check this on the pressure
gauge (BP5).
Emptying the hot water heater
The water heater is of the coil type and is drained using the
siphon principle. This can be done either via the drain valve
on the incoming cold water pipe or by inserting a hose into
the cold water connection.
Emptying the vessel
Contact your installer if the vessel in ACVM 270 needs
emptying.
Maintenance of AMS 10
AMS 10 is equipped with control and monitoring equipment,
however some exterior maintenance is still necessary.
Make regular checks throughout the year that the inlet grille
is not clogged by leaves, snow or anything else. During the
cold months of the year, check to make sure that there isn't
a build up of ice or frost under AMS 10. Strong wind com-
bined with heavy snowfall can block the intake and exhaust
air grilles. Make sure that there is no snow on the grilles.
Also check that the condensation water drain under AMS
10 is not blocked.
If necessary the outer casing can be cleaned using a damp
cloth. Care must be exercised so that the heat pump is not
scratched when cleaning. Avoid spraying water into the grilles
or the sides so that water penetrates into AMS 10. Prevent
AMS 10 coming into contact with alkaline cleaning agents.
!WARNING!
Rotating fan in AMS 10.
Saving tips
Your NIBE SPLIT installation produces heat and hot water
according to your needs. It also attempts to carry out all re-
quirements with all available ”aids” from the control settings
made.
The indoor temperature is naturally affected by the energy
consumption. Therefore, take care not to set a temperature
higher than necessary.
Other known factors that affect the energy consumption
are, for example, hot water consumption and the insulation
level of the house, as well as the level of comfort you require.
Also remember:
႑Open the thermostat valves completely (except in the
rooms that are to be kept cooler for various reasons, e.g.
bedrooms).
Thermostat valves in the radiators and floor loops can negat-
ively affect the energy consumption. They slow the flow in
the heating system, which the heat pump wants to com-
pensate with increased temperatures. It then works harder
and consumes more electrical energy.
NIBE™ SPLIT12
For Home Owners
Maintenance

Dealing with comfort disruption
Use the following list to find and remedy any heating or hot
water problems.
ActionCauseSymptom
Check and replace blown fuses.Circuit or main miniature circuit breaker
(MCB) tripped.
Low hot water temperature or a lack of hot
water
Check and replace any blown circuit and
main fuses.
Heat pump and immersion heater do not
heat.
Reset the earth circuit-breaker, if the earth
circuit-breaker trips repeatedly, call an electri-
cian.
Possible earth circuit-breaker tripped.
Set the switch to 1.Switch (SF1) set to mode 0.
Wait a few hours and check if the hot water
temperature rises.
Large hot water demand.
Adjust the start temperature setting in menu
1.2.
Too low start temperature setting on the
control system.
Reset the earth circuit-breaker, if the earth
circuit-breaker trips repeatedly, call an electri-
cian.
Possible earth circuit-breaker tripped.Low room temperature.
Check and replace any blown circuit and
main fuses.
Heat pump and immersion heater do not
heat.
Adjust the setting.Incorrect setting of "Curve slope", "Heating
curve, offset" and/or "Cooling curve, offset".
Check and replace blown fuses.Circuit or main miniature circuit breaker
(MCB) tripped.
Change operating mode to ”Auto” or "Au-
toK".
Heat pump in incorrect operating mode ”Hot
water” or "Cooling".
Switch off one/several of the power con-
sumers.
The current limiter has restricted the current
because many power consumers are being
used in the property.
Adjust the setting.Incorrect setting of "Curve slope", "Heating
curve, offset" and/or "Cooling curve, offset".
High room temperature.
Change operating mode to ”AutoK”.Heat pump in incorrect operating mode.
Adjust the settings. Check menu 2.2.1, 2.2.2
and 8.2.4.
Incorrect settings for cooling.
Wait 30 minutes and check if the compressor
starts.
Minimum time between compressor starts,
alternatively time after power switch on not
achieved.
The compressor does not start.
See section ”Alarms”.Alarm tripped.
Activate operating mode ”Only additional
heat”.
Alarm cannot be reset.
Check and replace any blown circuit and
main fuses.
Display not lit.
Check that the circuit breakers to the indoor
unit are off.
Check that the switch (SF1) is in normal pos-
ition (1).
13NIBE™ SPLIT
For Home Owners
Dealing with comfort disruption

Operating mode "Add. heat only"
In the event of malfunctions that cause a low indoor temper-
ature, you can normally activate "Add. heat only" in ACVM
270, which means that heating only occurs with the immer-
sion heater.
Activate the mode by holding in the operating mode button
for 7 seconds.
Note that this is only a temporary solution, as heating with
the immersion heater does not make any savings.
Emergency mode
Emergency mode is activated by setting the switch to ”
”. It is used when the control system and thereby oper-
ating mode "Add. heat only" do not function as they should.
Emergency mode is activated by setting switch (SF1) to ”
”.
The following applies in emergency mode:
႑The front panel is not lit and the control computer in
ACVM 270 is not connected.
႑AMS 10 is off and only the circulation pump and immer-
sion heater in ACVM 270 are active.
႑An electrical step of 4 kW is connected. The immersion
heater is controlled by a separate thermostat (BT30).
႑The automatic heating control system is not operational,
so manual shunt operation is required. Call installer.
NIBE™ SPLIT14
For Home Owners
Dealing with comfort disruption

Alarm indications
There are many monitoring functions integrated in NIBE SPLIT
to alert you to any malfunctions, the control computer
transmits alarm signals that can be read from the front panel
display.
What happens in the event of an alarm?
႑The background lighting in the display starts flashing and
the status lamp lights red.
႑Compressor alarms and outdoor sensor errors change
the operating mode to ”Anti freeze” and reduce the
supply temperature to the minimum permitted temperat-
ure to notify you that something is wrong.
Different types of alarms
႑Alarms with automatic reset (do not need to be acknow-
ledged when the cause has disappeared).
႑Existing alarms that require corrective action by you or
the installer.
႑A complete list of alarms is on page 58.
Recommended actions
1. Read off which alarm has occurred from the heat pump's
display.
2. As a customer you can rectify certain alarms. See the
table below for relevant actions. If the alarm is not recti-
fied, or is not included in the table, contact your installer.
Check/remedy before installers/service
technicians are called
Alarm descriptionAlarm text on the display
Check that the thermostats for the radiat-
ors/under-floor systems are not closed.
Tripped low pressure pressostat.LP-LARM
Check that the thermostats for the radiat-
ors/under-floor systems are not closed.
Tripped high pressure pressostat.HP-LARM
If cooling is in progress: Check that the air
flow to AMS 10 is not obstructed.
Check that any circuit breakers to the out-
door unit are not off.
Outdoor unit not powered / Communication
cut
OU power failure / OU Com. error
Check and replace any blown circuit and
main fuses.
Display not lit.
Check that the circuit breakers to the indoor
unit are off.
Check that the switch (SF1) is in normal pos-
ition (1).
Acknowledging alarms
No harm in acknowledging an alarm. If the cause of the
alarm remains, the alarm recurs.
႑When an alarm has been triggered, it can be acknow-
ledged by switching ACVM 270 off and on using the
switch (SF1). Note that when the power is switched on
there is a 30 minute delay before the heat pump restarts.
To prevent the delay, the alarm can be acknowledged
instead in menu 9.7 (service menu).
႑When the alarm cannot be reset using the switch (SF1),
the operating mode, "Add. heat only", can be activated
to resume a normal temperature level in the house.
This is most easily carried out by holding the ”Operating
mode” button in for 7 seconds.
NOTE
Recurring alarms mean that there is a fault in the in-
stallation.
Contact your installer!
15NIBE™ SPLIT
For Home Owners
Alarm indications

General information for the installer
Transport and storage
Outdoor module AMS 10
AMS 10 should be transported and stored vertically.
If the heat pump is to be lifted using lifting straps without
packaging, protect as illustrated.
The right-hand side of the heat pump (seen from the front)
is heavier.
Indoor module ACVM 270
ACVM 270 can be transported horizontally or vertically and
must be stored vertically and in dry conditions.
Supplied components
LEK
LEK
LEK
NIBEAB
Utetemperaturgivare
Outdoortemperature sensor
Aussentemperaturfühler
Artikel018764
Straps for 1 phase connectionOutside sensor
LEK
LEK
LEK
Safety valve with manometerCurrent sensor, 3 phase
The enclosed kit is located behind the front service cover in
ACVM 270.
Assembly
Outdoor module AMS 10
Position AMS 10 outdoors secured to a firm surface, prefer-
ably concrete foundation near walls with ground stand or
wall mounting. The distance between the ground and AMS
10 must be at least 200 mm. AMS 10 should not be posi-
tioned next to noise sensitive walls, for example, next to a
bedroom. Also ensure that the placement does not inconveni-
ence the neighbours. Care must be exercised so that the
heat pump is not scratched during installation.
Large amounts of condensation water as well as melt
water from defrosting can be produced. Provide good
drainage at the installation area and make sure water cannot
run out onto paths or the like during periods that ice can
form.
The distance between AMS 10 and the house wall must be
at least 150 mm. Ensure that there is at least one metre free
space above AMS 10. AMS 10 must not be placed so that
recirculation of outdoor air can occur. AMS 10 must not
be placed in a windy location where it is exposed to
direct strong winds. This causes lower output and im-
paired efficiency.
For wall installation, ensure that vibrations do not affect the
inside of the house. Also ensure that the wall and mounting
can take the weight of the heat pump.
Weak wind: > 0.5 km
Strong wind:>3km
Weak wind:>1km
Strong wind: > 10 km
Indirect offshore wind Direct offshore wind
150 mm
300 mm
300 mm
5 m
NIBE™ SPLIT16
For the Installer
General information for the installer

Indoor module ACVM 270
႑It is recommended that ACVM 270 is installed in a room
with existing floor drainage, most suitably in a utility room
or boiler room.
႑The surface must be firm, preferably a concrete floor or
foundation.
႑Install ACVM 270 with its back to an outside wall, ideally
in a room where noise does not matter. If this is not
possible, avoid placing it against a wall behind a bedroom
or other room where noise may be a problem.
႑The unit can be aligned using the adjustable feet.
႑Route pipes so they are not fixed to an internal wall that
backs on to a bedroom or living room.
႑Ensure that there is approx. 500 mm free space in front
of and 220 mm above the product for any future service.
Dimensioning expansion vessel
Internal volume in ACVM 270 for calculating expansion vessel
is 280 l. The expansion vessel's volume must be at least 5 %
of the total volume.
Example table
Volume Expansion vessel (l)Total volume (l)
14280
16320
18360
Initial pressure and max height difference
The initial pressure of the pressure expansion vessel must be
dimensioned according to the maximum height (H) between
the vessel and the highest positioned radiator, see figure.
An initial pressure of 0.5 bar (5 mvp) means a maximum
permitted height difference of 5 m.
If the standard initial pressure in the pressure vessel is not
high enough it can be increased by filling via the valve in the
expansion vessel. The expansion vessel's standard initial
pressure must be entered in the check list on page 33.
Any change in the initial pressure affects the ability of the
expansion vessel to handle the expansion of the water.
H
Manual shunting
When ACVM 270 is set to emergency mode, the heating
control system is not in operation, and manual shunt opera-
tion is required.
1. Depress and lock the button on (QN11).
2. Turn the mixing valve to the desired position by hand.
Button
Knob
QN11
Emptying the vessel
The vessel in ACVM 270 is emptied by opening the valve
(QM1) and safety valve (FL2).
NOTE
When the vessel in ACVM 270 is emptied via the valve
(QM1), some water will remain in the coil and in the
heat exchanger.
This means that there is a risk of the heat exchanger,
pipes and valves freezing at low temperatures as well
as a hygienic risk for the coil in the hot water section.
QM1
Recommended installation order
1. Connect ACVM 270 to the climate system, cold and hot
water lines as well as any external heat sources. See page
19. Also see docking descriptions on page 24 and further
on.
2. Install the refrigerant pipes according to the description
on page 21.
3. Connect the current limiter, any centralised load control
and external contacts as well as the cable between
ACVM 270 and AMS 10. See page 28.
17NIBE™ SPLIT
For the Installer
General information for the installer

4. Connect incoming supply to ACVM 270. See page 27.
5. Follow the commissioning instructions on page 31.
NIBE™ SPLIT18
For the Installer
General information for the installer