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Installer and user reference guide
VRV system air conditioner
FXNA20A2VEB
FXNA25A2VEB
FXNA32A2VEB
FXNA40A2VEB
FXNA50A2VEB
FXNA63A2VEB
Table of contents
Installer and user reference guide
2
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4P785124-1 – 2024.09
Table of contents
1 About the documentation 4
1.1 About this document...................................................................................................................................................... 4
2 General safety precautions 6
2.1 About the documentation.............................................................................................................................................. 6
2.1.1 Meaning of warnings and symbols................................................................................................................ 6
2.2 For the installer .............................................................................................................................................................. 7
2.2.1 General........................................................................................................................................................... 7
2.2.2 Installation site............................................................................................................................................... 8
2.2.3 Refrigerant — in case of R410A or R32......................................................................................................... 8
2.2.4 Electrical......................................................................................................................................................... 10
3 Specific installer safety instructions 13
3.1 Instructions for equipment using R32 refrigerant......................................................................................................... 15
3.1.1 Installation space requirements.................................................................................................................... 17
For the user 18
4 User safety instructions 19
4.1 General ........................................................................................................................................................................... 19
4.2 Instructions for safe operation ...................................................................................................................................... 20
5 About the system 25
5.1 System layout ................................................................................................................................................................. 25
5.2 Information requirements for fan coil units.................................................................................................................. 26
6 User interface 27
7 Before operation 28
8 Operation 29
8.1 Operation range ............................................................................................................................................................. 29
8.2 About operation modes ................................................................................................................................................. 29
8.2.1 Basic operation modes .................................................................................................................................. 29
8.2.2 Special heating operation modes.................................................................................................................. 30
8.3 To operate the system ................................................................................................................................................... 30
9 Energy saving and optimum operation 31
10 Maintenance and service 32
10.1 Precautions for maintenance and service ..................................................................................................................... 32
10.2 Cleaning the air filter and air outlet............................................................................................................................... 33
10.2.1 To clean the air filter...................................................................................................................................... 33
10.2.2 To clean the air outlet.................................................................................................................................... 34
10.3 Maintenance before a long stop period ........................................................................................................................ 34
10.4 Maintenance after a long stop period........................................................................................................................... 34
10.5 About the refrigerant ..................................................................................................................................................... 34
10.5.1 About the refrigerant leakage sensor ........................................................................................................... 35
11 Troubleshooting 37
11.1 Symptoms that are NOT system malfunctions.............................................................................................................. 38
11.1.1 Symptom: The system does not operate ...................................................................................................... 38
11.1.2 Symptom: White mist comes out of a unit (Indoor unit).............................................................................. 39
11.1.3 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)....................................................... 39
11.1.4 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes......... 39
11.1.5 Symptom: Noise of air conditioners (Indoor unit) ........................................................................................ 39
11.1.6 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) ................................................................. 39
11.1.7 Symptom: Dust comes out of the unit .......................................................................................................... 39
11.1.8 Symptom: The units can give off odours....................................................................................................... 39
12 Relocation 40
13 Disposal 41
For the installer 42
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14 About the box 43
14.1 Indoor unit...................................................................................................................................................................... 43
14.1.1 To unpack and handle the unit...................................................................................................................... 43
14.1.2 To remove the accessories from the indoor unit.......................................................................................... 43
15 About the units and options 45
15.1 Identification .................................................................................................................................................................. 45
15.1.1 Identification label: Indoor unit..................................................................................................................... 45
15.2 About the indoor unit..................................................................................................................................................... 45
15.3 System layout ................................................................................................................................................................. 46
15.4 Combining units and options ......................................................................................................................................... 46
15.4.1 Possible options for the indoor unit.............................................................................................................. 46
16 Unit installation 48
16.1 Preparing the installation site ........................................................................................................................................ 48
16.1.1 Installation site requirements of the indoor unit.......................................................................................... 48
16.2 Mounting the indoor unit............................................................................................................................................... 50
16.2.1 Guidelines when installing the indoor unit ................................................................................................... 50
16.2.2 Guidelines when installing the ducting ......................................................................................................... 55
16.2.3 Guidelines when installing the drain piping .................................................................................................. 56
17 Piping installation 59
17.1 Preparing refrigerant piping........................................................................................................................................... 59
17.1.1 Refrigerant piping requirements................................................................................................................... 59
17.1.2 Refrigerant piping insulation ......................................................................................................................... 60
17.2 Connecting the refrigerant piping.................................................................................................................................. 60
17.2.1 About connecting the refrigerant piping ...................................................................................................... 60
17.2.2 Precautions when connecting the refrigerant piping ................................................................................... 61
17.2.3 Guidelines when connecting the refrigerant piping ..................................................................................... 62
17.2.4 Pipe bending guidelines................................................................................................................................. 62
17.2.5 To flare the pipe end ..................................................................................................................................... 62
17.2.6 To connect the refrigerant piping to the indoor unit ................................................................................... 63
18 Electrical installation 65
18.1 About connecting the electrical wiring.......................................................................................................................... 65
18.1.1 Precautions when connecting the electrical wiring...................................................................................... 65
18.1.2 Guidelines when connecting the electrical wiring........................................................................................ 66
18.1.3 Specifications of standard wiring components............................................................................................. 67
18.2 To connect the electrical wiring to the indoor unit....................................................................................................... 68
19 Commissioning 71
19.1 Overview: Commissioning.............................................................................................................................................. 71
19.2 Precautions when commissioning ................................................................................................................................. 71
19.3 Checklist before commissioning .................................................................................................................................... 72
19.4 To perform a test run..................................................................................................................................................... 72
20 Configuration 74
20.1 Field setting .................................................................................................................................................................... 74
21 Hand-over to the user 78
22 Troubleshooting 79
22.1 Solving problems based on error codes ........................................................................................................................ 79
22.1.1 Error codes: Overview ................................................................................................................................... 79
23 Disposal 81
24 Technical data 82
24.1 Wiring diagram ............................................................................................................................................................... 82
24.1.1 Unified wiring diagram legend ...................................................................................................................... 82
25 Glossary 85
1 About the documentation |
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1 About the documentation
1.1 About this document
WARNING
Make sure installation, servicing, maintenance, repair and applied materials follow
the instructions from Daikin (including all documents listed in “Documentation set”)
and, in addition, comply with applicable legislation and are performed by qualified
persons only. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is
the applicable standard.
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained users in shops, in light
industry and on farms, or for commercial use by lay persons.
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)
▪Indoor unit installation and operation manual:
-Installation and operation instructions
-Format: Paper (in the box of the indoor unit)
▪Installer and user reference guide:
-Preparation of the installation, good practices, reference data,…
-Detailed step-by-step instructions and background information for basic and
advanced usage
-Format: Digital files on . Use the search function tohttps://www.daikin.eu
find your model.
The latest revision of the supplied documentation is published on the regional
Daikin website and is available via your dealer.
Scan the QR code below to find the full documentation set and more information
about your product on the Daikin website.
FXNA-A
The original instructions are written in English. All other languages are translations
of the original instructions.
Technical engineering data
▪A of the latest technical data is available on the regional Daikin websitesubset
(publicly accessible).
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▪The of the latest technical data is available on the Daikin Business Portalfull set
(authentication required).
2 General safety precautions |
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2 General safety precautions
2.1 About the documentation
▪The original instructions are written in English. All other languages are
translations of the original instructions.
▪The precautions described in this document cover very important topics, follow
them carefully.
▪The installation of the system, and all activities described in the installation
manual and in the installer reference guide MUST be performed by an authorised
installer.
2.1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING/SCALDING
Indicates a situation that could result in burning/scalding because of extreme hot or
cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate injury.
NOTICE
Indicates a situation that could result in equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
Symbols used on the unit:
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Symbol Explanation
Before installation, read the installation and operation
manual, and the wiring instruction sheet.
Before performing maintenance and service tasks, read the
service manual.
For more information, see the installer and user reference
guide.
The unit contains rotating parts. Be careful when servicing or
inspecting the unit.
Symbols used in the documentation:
Symbol Explanation
Indicates a figure title or a reference to it.
Example: " 1–3 Figure title" means "Figure 3 in chapter 1".
Indicates a table title or a reference to it.
Example: " 1–3 Table title" means "Table 3 in chapter 1".
2.2 For the installer
2.2.1 General
If you are NOT sure how to install or operate the unit, contact your dealer.
DANGER: RISK OF BURNING/SCALDING
▪Do NOT touch the refrigerant piping, water piping or internal parts during and
immediately after operation. It could be too hot or too cold. Give it time to return
to normal temperature. If you MUST touch it, wear protective gloves.
▪Do NOT touch any accidental leaking refrigerant.
WARNING
Improper installation or attachment of equipment or accessories could result in
electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY
use accessories, optional equipment and spare parts made or approved by Daikin
unless otherwise specified.
WARNING
Make sure installation, testing and applied materials comply with applicable
legislation (on top of the instructions described in the Daikin documentation).
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially
children, can play with them. suffocation.Possible consequence:
WARNING
Provide adequate measures to prevent that the unit can be used as a shelter by small
animals. Small animals that make contact with electrical parts can cause
malfunctions, smoke or fire.
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CAUTION
Wear adequate personal protective equipment (protective gloves, safety glasses,…)
when installing, maintaining or servicing the system.
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
CAUTION
▪Do NOT place any objects or equipment on top of the unit.
▪Do NOT sit, climb or stand on the unit.
In accordance with the applicable legislation, it might be necessary to provide a
logbook with the product containing at least: information on maintenance, repair
work, results of tests, stand-by periods,…
Also, at least, following information MUST be provided at an accessible place at the
product:
▪Instructions for shutting down the system in case of an emergency
▪Name and address of fire department, police and hospital
▪Name, address and day and night telephone numbers for obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
2.2.2 Installation site
▪Provide sufficient space around the unit for servicing and air circulation.
▪Make sure the installation site withstands the weight and vibration of the unit.
▪Make sure the area is well ventilated. Do NOT block any ventilation openings.
▪Make sure the unit is level.
Do NOT install the unit in the following places:
▪In potentially explosive atmospheres.
▪In places where there is machinery that emits electromagnetic waves.
Electromagnetic waves may disturb the control system, and cause malfunction of
the equipment.
▪In places where there is a risk of fire due to the leakage of flammable gases
(example: thinner or gasoline), carbon fibre, ignitable dust.
▪In places where corrosive gas (example: sulphurous acid gas) is produced.
Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.
2.2.3 Refrigerant — in case of R410A or R32
If applicable. See the installation manual or installer reference guide of your
application for more information.
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DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump down the system, and there
is a leak in the refrigerant circuit:
▪Do NOT use the unit's automatic pump down function, with which you can collect
all refrigerant from the system into the outdoor unit. Self-Possible consequence:
combustion and explosion of the compressor because of air going into the
operating compressor.
▪Use a separate recovery system so that the unit's compressor does NOT have to
operate.
WARNING
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
WARNING
Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks,
ventilate the area immediately. Possible risks:
▪Excessive refrigerant concentrations in a closed room can lead to oxygen
deficiency.
▪Toxic gas might be produced if refrigerant gas comes into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
WARNING
Make sure there is no oxygen in the system. Refrigerant may ONLY be charged after
performing the leak test and the vacuum drying.
Possible consequence: Self-combustion and explosion of the compressor because of
oxygen going into the operating compressor.
NOTICE
▪To avoid compressor breakdown, do NOT charge more than the specified amount
of refrigerant.
▪When the refrigerant system is to be opened, refrigerant MUST be treated
according to the applicable legislation.
NOTICE
Make sure refrigerant piping installation complies with applicable legislation. In
Europe, EN378 is the applicable standard.
NOTICE
Make sure the field piping and connections are NOT subjected to stress.
NOTICE
After all the piping has been connected, make sure there is no gas leak. Use nitrogen
to perform a gas leak detection.
▪In case recharge is required, see the nameplate or the refrigerant charge label of
the unit. It states the type of refrigerant and necessary amount.
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▪Whether the unit is factory charged with refrigerant or non-charged, in both
cases you might need to charge additional refrigerant, depending on the pipe
sizes and pipe lengths of the system.
▪ONLY use tools exclusively for the refrigerant type used in the system, this to
ensure pressure resistance and prevent foreign materials from entering into the
system.
▪Charge the liquid refrigerant as follows:
If Then
A siphon tube is present
(i.e., the cylinder is marked with "Liquid
filling siphon attached")
Charge with the cylinder upright.
A siphon tube is NOT present Charge with the cylinder upside down.
▪Open refrigerant cylinders slowly.
▪Charge the refrigerant in liquid form. Adding it in gas form may prevent normal
operation.
CAUTION
When the refrigerant charging procedure is done or when pausing, close the valve of
the refrigerant tank immediately. If the valve is NOT closed immediately, remaining
pressure might charge additional refrigerant. IncorrectPossible consequence:
refrigerant amount.
2.2.4 Electrical
DANGER: RISK OF ELECTROCUTION
▪Turn OFF all power supply before removing the switch box cover, connecting
electrical wiring or touching electrical parts.
▪Disconnect the power supply for more than 10minutes, and measure the voltage
at the terminals of main circuit capacitors or electrical components before
servicing. The voltage MUST be less than 50VDC before you can touch electrical
components. For the location of the terminals, see the wiring diagram.
▪Do NOT touch electrical components with wet hands.
▪Do NOT leave the unit unattended when the service cover is removed.
WARNING
If NOT factory installed, a main switch or other means for disconnection, having a
contact separation in all poles providing full disconnection under overvoltage
categoryIII condition, MUST be installed in the fixed wiring.
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WARNING
▪ONLY use copper wires.
▪Make sure the field wiring complies with the national wiring regulations.
▪All field wiring MUST be performed in accordance with the wiring diagram
supplied with the product.
▪NEVER squeeze bundled cables and make sure they do NOT come in contact with
the piping and sharp edges. Make sure no external pressure is applied to the
terminal connections.
▪Make sure to install earth wiring. Do NOT earth the unit to a utility pipe, surge
absorber, or telephone earth. Incomplete earth may cause electrical shock.
▪Make sure to use a dedicated power circuit. NEVER use a power supply shared by
another appliance.
▪Make sure to install the required fuses or circuit breakers.
▪Make sure to install an earth leakage protector. Failure to do so may cause
electrical shock or fire.
▪When installing the earth leakage protector, make sure it is compatible with the
inverter (resistant to high frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
WARNING
▪After finishing the electrical work, confirm that each electrical component and
terminal inside the switch box is connected securely.
▪Make sure all covers are closed before starting up the unit.
CAUTION
▪When connecting the power supply: connect the earth cable first, before making
the current-carrying connections.
▪When disconnecting the power supply: disconnect the current-carrying cables
first, before separating the earth connection.
▪The length of the conductors between the power supply stress relief and the
terminal block itself MUST be as such that the current-carrying wires are
tautened before the earth wire is in case the power supply is pulled loose from
the stress relief.
NOTICE
Precautions when laying power wiring:
▪Do NOT connect wiring of different thicknesses to the power terminal block (slack
in the power wiring may cause abnormal heat).
▪When connecting wiring which is the same thickness, do as shown in the figure
above.
▪For wiring, use the designated power wire and connect firmly, then secure to
prevent outside pressure being exerted on the terminal board.
▪Use an appropriate screwdriver for tightening the terminal screws. A screwdriver
with a small head will damage the head and make proper tightening impossible.
▪Over-tightening the terminal screws may break them.
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Install power cables at least 1 meter away from televisions or radios to prevent
interference. Depending on the radio waves, a distance of 1 meter may NOT be
sufficient.
NOTICE
ONLY applicable if the power supply is three‑phase, and the compressor has an ON/
OFF starting method.
If there exists the possibility of reversed phase after a momentary black out and the
power goes ON and OFF while the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed phase can break the
compressor and other parts.
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3 Specific installer safety instructions
Always observe the following safety instructions and regulations.
General
WARNING
Make sure installation, servicing, maintenance, repair and applied materials follow
the instructions from Daikin (including all documents listed in “Documentation set”)
and, in addition, comply with applicable legislation and are performed by qualified
persons only. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is
the applicable standard.
Unit installation (see "16Unit installation"
"16Unit installation"
"16Unit installation"
"16Unit installation""16Unit installation"[
[
[
[[
4
48]
48]
48]
48]48])
For additional installation site requirements, read also "3.1 Instructions for
equipment using R32 refrigerant"[415].
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).
CAUTION
Appliance NOT accessible to the general public, install it in a secured area, protected
from easy access.
This unit, both indoor and outdoor, is suitable for installation in a commercial and
light industrial environment.
WARNING
Keep any required ventilation openings clear of obstructions.
Duct installation (see "16.2.2Guidelines when installing the ducting"
"16.2.2Guidelines when installing the ducting"
"16.2.2Guidelines when installing the ducting"
"16.2.2Guidelines when installing the ducting""16.2.2Guidelines when installing the ducting"[
[
[
[[
4
55]
55]
55]
55]55])
WARNING
Do NOT install operating ignition sources (example: open flames, an operating gas
appliance or an operating electric heater) in the ductwork.
CAUTION
▪Make sure the installation of the duct does NOT exceed the setting range of the
external static pressure for the unit. Refer to the technical datasheet of your
model for the setting range.
▪Make sure to install the canvas duct so vibrations are NOT transmitted to the
duct or ceiling. Use a sound-absorbing material (insulation material) for the lining
of the duct and apply vibration insulation rubber to the hanging bolts.
▪When welding, make sure NOT to spatter onto the drain pan or the air filter.
▪If the metal duct passes through a metal lath, wire lath or metal plate of the
wooden structure, separate the duct and wall electrically.
▪Install the outlet grille in a position where the airflow will not come into direct
contact with people.
▪Do NOT use booster fans in the duct. Use the function to adjust the fan rate
setting automatically (see [
"20Configuration" 474]).
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Refrigerant piping installation (see "17Piping installation"
"17Piping installation"
"17Piping installation"
"17Piping installation""17Piping installation"[
[
[
[[
4
59]
59]
59]
59]59])
CAUTION
Piping MUST be installed according to instructions given in "17 Piping
installation" [4 59]. Only mechanical joints (e.g. braze+flare connections) that are
compliant with the latest version of ISO14903 can be used.
CAUTION
▪When connectors are re-used indoors, renew the sealing parts.mechanical
▪When are re-used indoors, re-make the flared part.flared joints
CAUTION
Install the refrigerant piping or components in a position where they are unlikely to
be exposed to any substance which may corrode components containing refrigerant,
unless the components are constructed of materials that are inherently resistant to
corrosion or are suitably protected against corrosion.
Electrical installation (see "18Electrical installation"
"18Electrical installation"
"18Electrical installation"
"18Electrical installation""18Electrical installation"[
[
[
[[
4
65]
65]
65]
65]65])
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
▪All wiring MUST be performed by an authorised electrician and MUST comply
with the national wiring regulation.
▪Make electrical connections to the fixed wiring.
▪All components procured on-site and all electrical construction MUST comply
with the applicable legislation.
WARNING
▪If the power supply has a missing or wrong N-phase, equipment might break
down.
▪Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber,
or telephone earth. Incomplete earthing may cause electrical shocks.
▪Install the required fuses or circuit breakers.
▪Secure the electrical wiring with cable ties so that the cables do NOT come in
contact with sharp edges or piping, particularly on the high-pressure side.
▪Do NOT use taped wires, extension cords, or connections from a star system.
They can cause overheating, electrical shocks or fire.
▪Do NOT install a phase advancing capacitor, because this unit is equipped with an
inverter. A phase advancing capacitor will reduce performance and may cause
accidents.
WARNING
If NOT factory installed, a main switch or other means for disconnection, having a
contact separation in all poles providing full disconnection under overvoltage
category III condition, MUST be installed in the fixed wiring.
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WARNING
If the supply cord is damaged, it MUST be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
CAUTION
▪Each indoor unit has to be connected to a separate user interface. Only a safety
system compatible remote controller can be used as the user interface. See
technical data sheet for remote controller compatibility (e.g. BRC1H52/82*).
▪The user interface has to be put in the same room as the indoor unit. For details,
please refer to the installation and operation manual of the user interface.
CAUTION
In case shielded wire is used, connect the shielding to the outdoor unit side only.
Configuration (see "20Configuration"
"20Configuration"
"20Configuration"
"20Configuration""20Configuration"[
[
[
[[
4
74]
74]
74]
74]74])
WARNING
In case of R32 refrigerant, terminal connections T1/T2 are for fire alarm input ONLY.
Fire alarm has a higher priority than R32 safety and shuts the entire system down.
T1
T2
X1M
a Fire alarm input signal (potential free contact)
3.1 Instructions for equipment using R32 refrigerant
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
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 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) and have a room
size as specified below.
WARNING
Make sure installation, servicing, maintenance and repair comply with instructions
from Daikin and with applicable legislation (for example national gas regulation) and
are executed ONLY by authorised persons.
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WARNING
▪Take precautions to avoid excessive vibration or pulsation to refrigeration piping.
▪Protect the protection devices, piping and fittings as much as possible against
adverse environmental effects.
▪Provide space for expansion and contraction of long runs of piping.
▪Design and install piping in refrigerating systems such as to minimise the
likelihood of hydraulic shock damaging the system.
▪Mount the indoor equipment and pipes securely and protect them to avoid
accidental rupture of equipment or pipes in case of events such as moving
furniture or reconstruction activities.
WARNING
If one or more rooms are connected to the unit using a duct system, make sure:
▪there are no operating ignition sources (example: open flames, an operating gas
appliance or an operating electric heater) in case the floor area is less than the
minimum floor area A (m²).
▪no auxiliary devices, which may be a potential ignition source, are installed in the
duct work (example: hot surfaces with a temperature exceeding 700°C and
electric switching device);
▪only auxiliary devices approved by the manufacturer are used in the duct work;
▪air inlet AND outlet are connected directly to the same room by ducting. Do NOT
use spaces such as a false ceiling as a duct for the air inlet or outlet.
CAUTION
▪Incomplete flaring may cause refrigerant gas leakage.
▪Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage.
▪Use flare nuts that are included with the unit. Using different flare nuts may
cause refrigerant gas leakage.
CAUTION
Do NOT use potential sources of ignition in searching for or detection of refrigerant
leaks.
NOTICE
▪Do NOT re-use joints and copper gaskets which have been used already.
▪Joints made in the installation between parts of the refrigerant system shall be
accessible for maintenance purposes.
CAUTION
Field-made refrigerant joints indoors shall be tightness tested. The test method shall
have a sensitivity of 5 grams per year of refrigerant or better under a pressure of at
least 0,25 times the maximum allowable pressure. No leak shall be detected.
3 Specific installer safety instructions |
Installer and user reference guide
17
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
3.1.1 Installation space requirements
CAUTION
The total refrigerant charge and/or releasable charge mrl in the system cannot
exceed the requirements for minimum floor area of the smallest room that is served.
For minimum floor area requirements for indoor units, go to https://www.daikin.eu
and search for the latest version of the installation and operation manual of the
connected outdoor unit.
NOTICE
▪The pipework shall be securely mounted and guarded protected from physical
damage.
▪Keep the pipework installation to a minimum.
For the user
Installer and user reference guide
18
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
For the user
4 User safety instructions |
Installer and user reference guide
19
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
4 User safety instructions
Always observe the following safety instructions and regulations.
4.1 General
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.
4 User safety instructions |
Installer and user reference guide
20
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
▪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:
dismantling 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.
4.2 Instructions for safe operation
WARNING
▪Do NOT modify, disassemble, remove, reinstall or repair
the unit yourself as incorrect dismantling or installation
may cause an electrical shock or fire. Contact your
dealer.
▪In case of accidental refrigerant leaks, make sure there
are no naked flames. The refrigerant itself is entirely
safe, non-toxic and mildly flammable, but it will
generate toxic gas when it accidentally leaks into a room
where combustible air from fan heaters, gas cookers,
etc. is present. Always have qualified service personnel
confirm that the point of leakage has been repaired or
corrected before resuming operation.
CAUTION
This unit is equipped with a leak detection system for
safety. To be effective, the unit must be electrically
powered at all times after installation, other than when
servicing.
4 User safety instructions |
Installer and user reference guide
22
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
WARNING
Do NOT install operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater) in the ductwork.
Maintenance and service (see "10Maintenance and service"
"10Maintenance and service"
"10Maintenance and service"
"10Maintenance and service""10Maintenance and service"[
[
[
[[
4
32]
32]
32]
32]32])
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while the fan is running.
Make sure to turn OFF the main switch before executing
any maintenance task.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. When the fan is rotating at high speed, it
will cause injury.
WARNING
NEVER replace a fuse with a fuse of a wrong ampere
ratings or other wires when a fuse blows out. Use of wire
or copper wire may cause the unit to break down or cause
a fire.
CAUTION
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
CAUTION
Before accessing terminal devices, make sure to interrupt
all power supply.
DANGER: RISK OF ELECTROCUTION
To clean the air conditioner or air filter, be sure to stop
operation and turn all power supplies OFF. Otherwise, an
electrical shock and injury may result.
4 User safety instructions |
Installer and user reference guide
23
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
WARNING
Be careful with ladders when working in high places.
DANGER: RISK OF ELECTROCUTION
Disconnect the power supply for more than 10 minutes,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing. The
voltage MUST be less than 50VDC before you can touch
electrical components. For the location of the terminals,
see the warning label for persons performing service and
maintenance.
CAUTION
Turn off the unit before cleaning the air filter and air
outlet.
WARNING
Do NOT let the indoor unit get wet. Possible consequence:
Electrical shock or fire.
About the refrigerant (see "10.5About the refrigerant"
"10.5About the refrigerant"
"10.5About the refrigerant"
"10.5About the refrigerant""10.5About the refrigerant"[
[
[
[[
4
34]
34]
34]
34]34])
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
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.
4 User safety instructions |
Installer and user reference guide
24
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
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.
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
The R32 refrigerant leakage sensor must be replaced after
every detection or at the end of its lifetime. ONLY
authorised persons may replace the sensor.
CAUTION
When replacing the R32 refrigerant leakage sensor,
replace it with the sensor specified by the manufacturer
(refer to the spare parts list).
Troubleshooting (see "11Troubleshooting"
"11Troubleshooting"
"11Troubleshooting"
"11Troubleshooting""11Troubleshooting"[
[
[
[[
4
37]
37]
37]
37]37])
WARNING
Stop operation and shut OFF the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electrical shock or fire. Contact your
dealer.
5 About the system |
Installer and user reference guide
25
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
5 About the system
WARNING
▪Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as
incorrect dismantling or installation may cause an electrical shock or fire. Contact
your dealer.
▪In case of accidental refrigerant leaks, make sure there are no naked flames. The
refrigerant itself is entirely safe, non-toxic and mildly flammable, but it will
generate toxic gas when it accidentally leaks into a room where combustible air
from fan heaters, gas cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been repaired or corrected
before resuming operation.
WARNING
The unit is equipped with a refrigerant leak detection system for safety.
To be effective, the unit MUST be electrically powered at all times after installation,
except for short service periods.
NOTICE
Do NOT use the system for other purposes. In order to avoid any quality
deterioration, do NOT use the unit for cooling precision instruments, food, plants,
animals, or works of art.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future system extensions) is available
in technical engineering data and should be consulted. Contact your installer to
receive more information and professional advice.
5.1 System layout
INFORMATION
The following figure is an example and may NOT completely match your system
layout.
°
C
c
°
C
c
b
a a
aIndoor unit
bOutdoor unit
cUser interface
5 About the system |
Installer and user reference guide
26
FXNA-A
VRV system air conditioner
4P785124-1 – 2024.09
5.2 Information requirements for fan coil units
Item Symbol Value Unit
Cooling capacity (sensible) Prated,c A kW
Cooling capacity (latent) Prated,c B kW
Heating capacity Prated,h C kW
Total electric power input Pelec D kW
Sound power level (cooling) LWA E dB(A)
Sound power level (heating) LWA F dB(A)
Contact details:
DAIKIN INDUSTRIES CZECH REPUBLIC s.r.o. U Nové Hospody 1155/1, 301 00 Plzeň
Skvrňany, Czech Republic
A B C D E F
FXNA20A2VEB 1.5 0.7 2.5 0.051 H: 49,
M: 47.5,
L: 46
H: 50.5,
M: 49,
L: 47.5
FXNA25A2VEB 2 0.8 3.2 0.051 H: 51,
M: 49.5,
L: 48
H: 52,
M: 50.5,
L: 49
FXNA32A2VEB 2.5 1.1 4 0.051 H: 52.5,
M: 51,
L: 49.5
H: 54,
M: 52.5,
L: 51
FXNA40A2VEB 3.1 1.4 5 0.069 H: 51.5,
M: 49.5,
L: 47.5
H: 52.5,
M: 50.2,
L: 48.5
FXNA50A2VEB 3.9 1.7 6.3 0.087 H: 55.5,
M: 53.5,
L: 51.5
H: 57.5,
M: 55.5,
L: 53.5
FXNA63A2VEB 4.9 2.2 8 0.108 H: 54.5,
M: 52.5,
L: 50.5
H: 55.5,
M: 53.5,
L: 51.5

Tuotetiedot

Merkki: Daikin
Kategoria: Ei luokiteltu
Malli: FXNA40A2VEB

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