Daikin FDA125A5VEB User guide

Installer and user reference guide
Split system air conditioners English
Installer and user
reference guide
Split system air conditioners
FDA125A5VEB

Table of Contents
Installer and user reference guide
2
FDA125A5VEB
Split system air conditioners
4P495031-1A – 2019.03
Table of Contents
1 General safety precautions 2
1.1 About the documentation .......................................................... 2
1.1.1 Meaning of warnings and symbols.............................. 3
1.2 For the user ............................................................................... 3
1.3 For the installer.......................................................................... 3
1.3.1 General ....................................................................... 3
1.3.2 Installation site ............................................................ 4
1.3.3 Refrigerant .................................................................. 5
1.3.4 Brine............................................................................ 6
1.3.5 Water .......................................................................... 6
1.3.6 Electrical ..................................................................... 6
2 About the documentation 7
2.1 About this document.................................................................. 7
For the installer 7
3 About the box 7
3.1 Overview: About the box ........................................................... 7
3.2 Indoor unit ................................................................................. 7
3.2.1 To unpack and handle the unit.................................... 7
3.2.2 To remove the accessories from the indoor unit......... 8
4 About the units and options 8
4.1 Overview: About the units and options...................................... 8
4.2 System layout............................................................................ 8
4.3 Combining units and options ..................................................... 8
4.3.1 Possible options for the indoor unit............................. 8
5 Preparation 8
5.1 Overview: Preparation............................................................... 8
5.2 Preparing the installation site .................................................... 8
5.2.1 Installation site requirements of the indoor unit .......... 8
5.3 Preparing refrigerant piping....................................................... 9
5.3.1 Refrigerant piping requirements.................................. 9
5.3.2 Refrigerant piping insulation ....................................... 10
5.4 Preparing electrical wiring ......................................................... 10
5.4.1 About preparing electrical wiring................................. 10
6 Installation 10
6.1 Overview: Installation ................................................................ 10
6.2 Mounting the indoor unit............................................................ 10
6.2.1 Precautions when mounting the indoor unit................ 10
6.2.2 Guidelines when installing the indoor unit................... 10
6.2.3 Guidelines when installing the ducting........................ 12
6.2.4 Guidelines when installing the drain piping................. 12
6.3 Connecting the refrigerant piping .............................................. 14
6.3.1 About connecting the refrigerant piping ...................... 14
6.3.2 Precautions when connecting the refrigerant piping... 14
6.3.3 Guidelines when connecting the refrigerant piping..... 14
6.3.4 Pipe bending guidelines.............................................. 14
6.3.5 To flare the pipe end................................................... 15
6.3.6 To connect the refrigerant piping to the indoor unit .... 15
6.4 Connecting the electrical wiring................................................. 15
6.4.1 About connecting the electrical wiring......................... 15
6.4.2 Precautions when connecting the electrical wiring ..... 15
6.4.3 Guidelines when connecting the electrical wiring ....... 16
6.4.4 Specifications of standard wiring components............ 16
6.4.5 To connect the electrical wiring on the indoor unit...... 16
7 Configuration 17
7.1 Field settings ............................................................................. 17
8 Commissioning 18
8.1 Overview: Commissioning......................................................... 18
8.2 Checklist before commissioning................................................ 18
8.3 To perform a test run.................................................................. 18
8.4 Error codes when performing a test run ..................................... 19
9 Hand-over to the user 19
10 Disposal 20
11 Technical data 20
11.1 Wiring diagram ........................................................................... 20
11.1.1 Unified wiring diagram legend...................................... 20
For the user 21
12 About the system 21
12.1 Components ............................................................................... 21
12.2 Information requirements for fan coil units ................................. 22
13 User interface 22
14 Before operation 22
15 Operation 22
15.1 Operation range ......................................................................... 22
15.2 Operation procedure .................................................................. 23
16 Energy saving and optimum operation 23
17 Maintenance and service 23
17.1 Overview: Maintenance and service .......................................... 23
17.2 Cleaning the air filter, suction grille, air outlet and outside
panels......................................................................................... 24
17.2.1 To clean the air outlet and outside panels ................... 24
17.2.2 To clean the air filter .................................................... 24
17.3 Maintenance before a long stop period ...................................... 25
17.4 Maintenance after a long stop period ......................................... 25
18 Troubleshooting 25
18.1 Symptoms that are NOT system malfunctions ........................... 26
18.1.1 Symptom: The system does not operate ..................... 26
18.1.2 Symptom: Air blow direction is not as specified........... 26
18.1.3 Symptom: White mist comes out of a unit (Indoor
unit) .............................................................................. 26
18.1.4 Symptom: Noise of air conditioners (indoor unit) ......... 26
18.1.5 Symptom: Dust comes out of the unit .......................... 26
18.1.6 Symptom: The units can give off odours...................... 26
18.1.7 Symptom: The display shows "88"............................... 27
18.1.8 Symptom: The operation stopped suddenly
(Operation lamp is on) ................................................. 27
18.1.9 Symptom: The outdoor fan rotates while the air
conditioner is not in operation ...................................... 27
18.1.10 Symptom: The heating operation stops suddenly and
a flowing sound is heard .............................................. 27
19 Relocation 27
20 Disposal 27
21 Glossary 27
1 General safety precautions
1.1 About the documentation
▪ The original documentation is written in English. All other
languages are translations.
▪ 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 the installer reference guide MUST be
performed by an authorised installer.

1 General safety precautions
Installer and user reference guide
3
FDA125A5VEB
Split system air conditioners
4P495031-1A – 2019.03
1.1.1 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
Indicates a situation that could result in burning 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.
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.
1.2 For the user
▪ If you are NOT sure how to operate the unit, contact your installer.
▪ This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in
a safe way and understand the hazards involved. Children shall
NOT play with the appliance. Cleaning and user maintenance
shall NOT be made by children without supervision.
WARNING
To prevent electric 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.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
▪ Units are marked with the following symbol:
This means that electrical and electronic products may NOT be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: the dismantling of the system, treatment of
the refrigerant, of oil and of other parts must be done by an
authorized installer and must comply with applicable legislation.
Units must be treated at a specialized 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 specialized 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.
1.3 For the installer
1.3.1 General
If you are NOT sure how to install or operate the unit, contact your
dealer.
NOTICE
Improper installation or attachment of equipment or
accessories could result in electric shock, short-circuit,
leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or
approved by Daikin.
WARNING
Make sure installation, testing and applied materials
comply with applicable legislation (on top of the
instructions described in the Daikin documentation).
CAUTION
Wear adequate personal protective equipment (protective
gloves, safety glasses,…) when installing, maintaining or
servicing the system.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
DANGER: RISK OF BURNING
▪ 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.

1 General safety precautions
Installer and user reference guide
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FDA125A5VEB
Split system air conditioners
4P495031-1A – 2019.03
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.
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
NOTICE
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
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.
1.3.2 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.
Instructions for equipment using R32 refrigerant
If applicable.
WARNING
▪ Do NOT pierce or burn.
▪ Do NOT use means to accelerate the defrosting
process or to clean the equipment, other than those
recommended by the manufacturer.
▪ Be aware that R32 refrigerant does NOT contain an
odour.
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.
NOTICE
▪ Do NOT re-use joints which have been used already.
▪ Joints made in installation between parts of refrigerant
system shall be accessible for maintenance purposes.
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.
Installation space requirements
NOTICE
▪ Pipework shall be protected from physical damage.
▪ Installation of pipework shall be kept to a minimum.
WARNING
If appliances contain R32 refrigerant, the floor area of the
room in which the appliances are installed, operated and
stored MUST be larger than the minimum floor area
defined in table below A (m2). This applies to:
▪ Indoor units without a refrigerant leakage sensor; in
case of indoor units with refrigerant leakage sensor,
consult the installation manual
▪ Outdoor units installed or stored indoors (e.g. winter
garden, garage, machinery room)
▪ Pipework in unventilated spaces
To determine the minimum floor area
1Determine the total refrigerant charge in the system (= factory
refrigerant charge + additional refrigerant amount
charged).
Contains fluorinated greenhouse gases
2
11
1
2
2kg
tCO
2
eq
1000
GWP × kg
=
=
+
kg
=
kg
=
GWP: xxx
R32
2Determine which graph or table to use.
▪ For indoor units: Is the unit ceiling-mounted, wall-mounted or
floor-standing?
▪ For outdoor units installed or stored indoors, and field piping
in unventilated spaces, this depends on the installation
height:
If the installation height is… Then use the graph or table for…
<1.8m Floor-standing units
1.8≤x<2.2m Wall-mounted units
≥2.2m Ceiling-mounted units
3Use the graph or table to determine the minimum floor area.

1 General safety precautions
Installer and user reference guide
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FDA125A5VEB
Split system air conditioners
4P495031-1A – 2019.03
0
10
20
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1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
4.2
4.4
4.6
4.8
5
5.2
5.4
5.6
5.8
6
6.2
6.4
6.6
6.8
7
7.2
7.4
7.6
7.8
1.843 7.956
8.0
Amin (m2)
Floor-standing unit
(c)
Wall-mounted unit
(b)
Ceiling-mounted unit
(a)
m (kg)
Ceiling-mounted
unit(a)
4.6 13.4 4.6 180
4.8 14.6 4.8 196
5.0 15.8 5.0 213
≤1.842 —
5.2 17.1
≤1.842 —
5.2 230
1.843 3.64
5.4 18.5
1.843 28.9
5.4 248
2.0 3.95
5.6 19.9
2.0 34.0
5.6 267
2.2 4.34
5.8 21.3
2.2 41.2
5.8 286
2.4 4.74
6.0 22.8
2.4 49.0
6.0 306
2.6 5.13
6.2 24.3
2.6 57.5
6.2 327
2.8 5.53
6.4 25.9
2.8 66.7
6.4 349
3.0 5.92
6.6 27.6
3.0 76.6
6.6 371
3.2 6.48
6.8 29.3
3.2 87.2
6.8 394
3.4 7.32
7.0 31.0
3.4 98.4
7.0 417
3.6 8.20
7.2 32.8
3.6 110
7.2 441
3.8 9.14
7.4 34.7
3.8 123
7.4 466
4.0 10.1
7.6 36.6
4.0 136
7.6 492
4.2 11.2
7.8 38.5
4.2 150
7.8 518
4.4 12.3
7.956 40.1
4.4 165
7.956 539
m (kg) Amin (m2)
4.6 20.0
4.8 21.8
5.0 23.6
≤1.842 —
5.2 25.6
1.843 4.45
5.4 27.6
2.0 4.83
5.6 29.7
2.2 5.31
5.8 31.8
2.4 5.79
6.0 34.0
2.6 6.39
6.2 36.4
2.8 7.41
6.4 38.7
3.0 8.51
6.6 41.2
3.2 9.68
6.8 43.7
3.4 10.9
7.0 46.3
3.6 12.3
7.2 49.0
3.8 13.7
7.4 51.8
4.0 15.1
7.6 54.6
4.2 16.7
7.8 57.5
4.4 18.3
7.956 59.9
Wall-mounted
unit(b)
m (kg) Amin (m2)
Floor-standing
unit(c)
m (kg) Amin (m2)
mTotal refrigerant charge in the system
Amin Minimum floor area
(a) Ceiling-mounted unit (= Ceiling-mounted unit)
(b) Wall-mounted unit (= Wall-mounted unit)
(c) Floor-standing unit (= Floor-standing unit)
1.3.3 Refrigerant
If applicable. See the installation manual or installer reference guide
of your application for more information.
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.
WARNING
During tests, NEVER pressurize 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 may be produced if refrigerant gas comes
into contact with fire.
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. Possible consequence:
Self-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
ALWAYS recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
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.
WARNING
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
▪ In case recharge is required, see the nameplate of the unit. It
states the type of refrigerant and necessary amount.
▪ The unit is factory charged with refrigerant and depending on pipe
sizes and pipe lengths some systems require additional charging
of refrigerant.

1 General safety precautions
Installer and user reference guide
6
FDA125A5VEB
Split system air conditioners
4P495031-1A – 2019.03
▪ 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.
Possible consequence: Incorrect refrigerant amount.
1.3.4 Brine
If applicable. See the installation manual or installer reference guide
of your application for more information.
WARNING
The selection of the brine MUST be in accordance with the
applicable legislation.
WARNING
Take sufficient precautions in case of brine leakage. If
brine leaks, ventilate the area immediately and contact
your local dealer.
WARNING
The ambient temperature inside the unit can get much
higher than that of the room, e.g. 70°C. In case of a brine
leak, hot parts inside the unit can create a hazardous
situation.
WARNING
The use and installation of the application MUST comply
with the safety and environmental precautions specified in
the applicable legislation.
1.3.5 Water
If applicable. See the installation manual or installer reference guide
of your application for more information.
NOTICE
Make sure water quality complies with EU directive
98/83EC.
1.3.6 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 1 minute,
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.
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ 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 electric 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.
CAUTION
When connecting the power supply, the earth connection
must be made before the current-carrying connections are
established. When disconnecting the power supply, the
current-carrying connections must be separated before the
earth connection is. 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.

2 About the documentation
Installer and user reference guide
7
FDA125A5VEB
Split system air conditioners
4P495031-1A – 2019.03
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.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
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.
2 About the documentation
2.1 About this document
INFORMATION
Make sure that the user has the printed documentation and
ask him/her to keep it for future reference.
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 and household 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 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 dealer.
The original documentation is written in English. All other languages
are translations.
Technical engineering data
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
extranet (authentication required).
For the installer
3 About the box
3.1 Overview: About the box
This chapter describes what you have to do after the box with the
indoor unit is delivered on-site.
Keep the following in mind:
▪ At delivery, the unit MUST be checked for damage. Any damage
MUST be reported immediately to the claims agent of the carrier.
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
▪ Prepare the path along which you want to bring the unit inside in
advance.
3.2 Indoor unit
WARNING: FLAMMABLE MATERIAL
The R32 refrigerant (if applicable) in this unit is mildly
flammable. Refer to the outdoor unit specifications for the
type of refrigerant to be used.
3.2.1 To unpack and handle the unit
Use a sling of soft material or protective plates together with a rope
when lifting the unit. This to avoid damage or scratches to the unit.
Lift the unit by holding on to the hanger brackets without exerting
any pressure on other parts, especially on refrigerant piping, drain
piping and other resin parts.

4 About the units and options
Installer and user reference guide
8
FDA125A5VEB
Split system air conditioners
4P495031-1A – 2019.03
3.2.2 To remove the accessories from the
indoor unit
16×8×1× 1× 3×
1×
1×
1×
1×
dcba e f g
h i j
2×
aInstallation manual and operation manual
bGeneral safety precautions
cWashers for hanger bracket
dScrews for duct flanges
eMetal clamp
fSealing pads: Large (drain pipe), medium 1 (gas pipe),
medium 2 (liquid pipe)
gDrain hose
hInsulation piece: Small (liquid pipe)
iInsulation piece: Large (gas pipe)
lWire for common power supply
4 About the units and options
4.1 Overview: About the units and
options
This chapter contains information about:
▪ Combining outdoor and indoor units
▪ Combining the indoor unit with options
WARNING
NEVER use a flammable spray such as hair spray, lacquer
or paint near the unit. It may cause a fire.
4.2 System layout
b
f
a
h
c
d
e
g
aIndoor unit
bOutdoor unit
cUser interface
dSuction air
eDischarge air
fRefrigerant piping + interconnection cable
gDrain pipe
hEarth wiring
4.3 Combining units and options
4.3.1 Possible options for the indoor unit
Make sure you have the following mandatory options:
▪ User interface: Wired or wireless
▪ Air inlet panel and canvas connection for the air inlet panel (in
case of bottom suction).
5 Preparation
5.1 Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
▪ Preparing the electrical wiring
5.2 Preparing the installation site
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Choose the installation location with sufficient space for carrying
the unit in and out of the site.
WARNING
Do NOT install the air conditioner at any place where
flammable gas may leak out. If the gas leaks out and stays
around the air conditioner, a fire may break out.
5.2.1 Installation site requirements of the
indoor unit
INFORMATION
Also read the following requirements:
▪ General installation site requirements. See the
"General safety precautions" chapter.
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
INFORMATION
The sound pressure level is less than 70dBA.
NOTICE
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.

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▪Fluorescent lights. When installing a wireless user interface in a
room with fluorescent lights, mind the following to avoid
interference:
▪ Install the wireless user interface as close as possible to the
indoor unit.
▪ Install the indoor unit as far as possible from the fluorescent
lights.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
WARNING
Do NOT place objects below the indoor and/or outdoor unit
that may get wet. Otherwise condensation on the main unit
or refrigerant pipes, air filter dirt or drain blockage may
cause dripping, and objects under the unit may get dirty or
damaged.
▪Air flow. Make sure nothing blocks the air flow.
▪Drainage. Make sure condensation water can be evacuated
properly.
▪Ceiling insulation. When conditions in the ceiling exceed 30°C
and a relative humidity of 80%, or when fresh air is inducted into
the ceiling, then additional insulation is required (minimum 10mm
thickness, polyethylene foam).
▪Protective guards. Make sure to install protective guards on the
suction and discharge side to prevent somebody from touching
the fan blades or heat exchanger.
Do NOT install the unit in the following places:
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
▪ Use suspension bolts for installation.
▪Spacing. Mind the following requirements:
≥300
a
e
b fg
d c
aService space
bDrain pipe
cPower supply wiring port
dTransmission wiring port
eMaintenance drain outlet
fGas pipe
gLiquid pipe
▪Installation options:
680
c
b
a
A
d
a
B
b
c
680
200<45
de
f
g
a
C
b
c
680 de
f
AStandard rear suction
BInstallation with rear duct and duct service opening
CInstallation with rear duct, no duct service opening
aCeiling surface
bCeiling opening
cService access panel (optional accessory)
dAir filter
eAir inlet filter
fDuct service opening
gInterchangeable plate
5.3 Preparing refrigerant piping
5.3.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30mg/10m.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
L1 liquid piping Ø9.5mm
L1 gas piping Ø15.9mm
Refrigerant piping material
▪Piping material: Phosphoric acid deoxidised seamless copper.
▪Flare connections: Only use annealed material.
▪Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade Thickness (t)(a)
9.5mm (3/8") Annealed (O) ≥0.8mm
t
Ø
15.9mm (5/8") Annealed (O)
(a) Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.

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5.3.2 Refrigerant piping insulation
▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052W/mK (0.035
and 0.045kcal/mh°C)
▪ with a heat resistance of at least 120°C
▪ Insulation thickness
Pipe outer diameter
(Øp)
Insulation inner
diameter (Øi)
Insulation thickness
(t)
9.5mm (3/8") 10~14mm ≥13mm
15.9mm (5/8") 16~20mm ≥13mm
Ø
i
Ø
i
t
Ø
p
Ø
p
If the temperature is higher than 30°C and the humidity is higher
than RH80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
5.4 Preparing electrical wiring
5.4.1 About preparing electrical wiring
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
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 shock.
▪ 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, stranded conductor wires,
extension cords, or connections from a star system.
They can cause overheating, electrical shock 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
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST comply with the applicable
legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
6 Installation
6.1 Overview: Installation
This chapter describes what you have to do and know on-site to
install the system.
Typical workflow
Installation typically consists of the following stages:
1 Mounting the outdoor unit.
2 Mounting the indoor unit.
3 Connecting the refrigerant piping.
4 Checking the refrigerant piping.
5 Charging refrigerant.
6 Connecting the electrical wiring.
7 Finishing the outdoor installation.
8 Finishing the indoor installation.
INFORMATION
This chapter only describes installation instructions specific
to the indoor unit. For the other instructions, see:
▪ The installation manual of the outdoor unit
▪ The installation manual of the user interface
▪ The installation manual of the optional accessories
6.2 Mounting the indoor unit
6.2.1 Precautions when mounting the indoor
unit
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
6.2.2 Guidelines when installing the indoor unit
INFORMATION
Optional equipment. When installing optional equipment,
also read the installation manual of the optional equipment.
Depending on the field conditions, it might be easier to
install the optional equipment first.
▪In case of installation with duct, but no duct service opening.
Modify the position of the air filters.
1
2
4
3
1Remove the air filter(s) from the outside of the unit.
2Remove the interchangeable plate.
3Install the air filter(s) on the inside of the unit.
4Reinstall the interchangeable plate.

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▪ When installing an air inlet duct, select fixing screws that stick out
5 mm on the inside of the flange to protect the air filter from
damage during maintenance of the filter.
a
b
c
5 mm
aAir inlet duct
bInside of the flange
cFixing screw
▪Ceiling strength. Check whether the ceiling is strong enough to
support the weight of the unit. If there is a risk, reinforce the ceiling
before installing the unit.
▪Installation options:
b
b
a
c
c
a
A
B
180
460 1460
1460
160
(160~300)
425
180
460
≥350
ed
d
AMounting the air inlet with a canvas connection
BMounting the air inlet panel directly
aCeiling surface
bCeiling opening
cAir inlet panel (optional accessory)
dIndoor unit (back side)
eCanvas connection for air inlet panel (optional accessory)
NOTICE
The unit can be used with bottom suction by replacing the
interchangeable plate by the air filter holding plate.
b
a
a
aAir filter holding plate with air filter(s)
bInterchangeable plate
▪Suspension bolts. Use M10 suspension bolts for installation.
Attach the hanger bracket to the suspension bolt. Fix it securely
using a nut and washer from the upper and lower sides of the
hanger bracket.
▪Ceiling opening size. Make sure the ceiling opening is within the
following limits:
1400 1450
d
a
db
700
630
c
a1
b1
b1
a2
c1
4×
a1 Nut (field supply)
a2 Double nut (field supply)
b1 Washer (accessories)
c1 Hanger bracket (attached to the unit)
aIndoor unit
bPipe
cHanger bracket pitch (suspension)
dSuspension bolt spacing
INFORMATION
▪ The fan speed of the indoor unit is preset to ensure the
standard external static pressure.
▪ To set a higher or lower external static pressure, reset
the initial setting with the user interface.
▪Installation example:
b
a
c
e
d
aAnchor
bCeiling slab
cLong nut or turn-buckle
dSuspension bolt
eIndoor unit
▪Install the unit temporarily.
5Attach the hanger bracket to the suspension bolt.
6Fix it securely.
▪Level. Make sure the unit is level at all four corners using a level
or a water-filled vinyl tube.
b
a
aWater level
bVinyl tube
7Tighten the upper nut.
NOTICE
Do NOT install the unit tilted. Possible consequence: If
the unit is tilted against the direction of the condensate flow
(the drain piping side is raised), the float switch might
malfunction and cause water to drip.

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6.2.3 Guidelines when installing the ducting
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 Amin
specified in the General safety precautions;
▪ 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;
▪ an air inlet or outlet is connected directly with a room by
ducting. Do NOT use spaces such as a false ceiling as
a duct for the air inlet or outlet.
WARNING
Do NOT install operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater) in the duct work.
The ducting is to be field supplied.
▪Air inlet side. Attach the duct and intake-side flange (field
supply). For connecting the flange, use 7 accessory screws.
a b b a
eed d
c
aConnection screw (accessory)
bFlange (field supply)
cMain unit
dInsulation (field supply)
eAluminium tape (field supply)
▪Filter. Be sure to attach an air filter inside the air passage on the
intake side. Use an air filter with dust collecting efficiency ≥50%
(gravimetric method). The included filter is not used when the
intake duct is attached.
▪Air outlet side. Connect the duct according to the inside
dimension of the outlet-side flange.
▪Air leaks. Wind aluminium tape around the intake side flange and
duct connection. Make sure there are no air leaks at any other
connection.
▪Insulation. Insulate the duct to prevent condensation from
forming. Use glass wool or polyethylene foam 25mm thick.
6.2.4 Guidelines when installing the drain
piping
Make sure condensation water can be evacuated properly. This
involves:
▪ General guidelines
▪ Connecting the drain piping to the indoor unit
▪ Checking for water leaks
General guidelines
▪Drain pump. For this "high lift type", the drainage sounds will be
reduced when the drain pump is installed in a higher location.
Recommended height is 300 mm.
▪Pipe length. Keep drain piping as short as possible.
▪Pipe size. Keep the pipe size equal to or greater than that of the
connecting pipe (vinyl pipe of 25 mm nominal diameter and
32mm outer diameter).
▪Slope. Make sure the drain piping slopes down (at least 1/100) to
prevent air from being trapped in the piping. Use hanging bars as
shown.
1~1.5 m
a
aHanging bar
OAllowed
XNot allowed
▪Condensation. Take measures against condensation. Insulate
the complete drain piping in the building.
▪Rising piping. If necessary to make the slope possible, you can
install rising piping.
▪ Drain hose inclination: 0~75 mm to avoid stress on the piping
and to avoid air bubbles.
▪ Rising piping: ≤300 mm from the unit, ≤625 mm perpendicular
to the unit.
≤625
≤300
0~75
1000~1500
(mm)
ba
ba ddc
aMetal clamp (accessory)
bDrain hose (accessory)
cRising drain piping (vinyl pipe of 25mm nominal diameter
and 32mm outer diameter) (field supply)
dHanging bars (field supply)
▪Combining drain pipes. You can combine drain pipes. Make
sure to use drain pipes and T-joints with the correct gauge for the
operating capacity of the units.
≥100≤625
(mm)
a
aT-joint
To connect the drain piping to the indoor unit
NOTICE
Incorrect connection of the drain hose might cause leaks,
and damage the installation space and surroundings.
1Push the drain hose as far as possible over the drain pipe
connection.
2Tighten the metal clamp until the screw head is less than 4mm
from the metal clamp part.
3Check for water leaks (see "To check for water leaks" on
page13).
4Install the insulation piece (drain pipe).

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5Wind the large sealing pad (= insulation) around the metal
clamp and drain hose, and fix it with cable ties.
6Connect the drain piping to the drain hose.
≤4 mm
A
A'
A-A'
A
A'
f652
ce4 ba d
b
a
d
c3
1
2~61
aDrain pipe connection (attached to the unit)
bDrain hose (accessory)
cMetal clamp (accessory)
dLarge sealing pad (accessory)
eInsulation piece (drain pipe) (accessory)
fDrain piping (field supply)
NOTICE
▪ Do NOT remove the drain pipe plug. Water might leak
out.
▪ Use the drain outlet only to discharge the water if the
drain pump is not used or before maintenance.
▪ Insert and remove the drain plug gently. Excessive
force may deform the drain socket of the drain pan.
Pull out the plug.
▪ Do NOT wiggle the plug up and down.
a
Push in the plug.
▪ Set the plug and push it in using a Phillips screwdriver.
a
b
aDrain plug
bPhillips screwdriver
To check for water leaks
The procedure differs depending on whether electrical wiring is
already finished. When electrical wiring is not finished yet, you need
to temporarily connect the user interface and power supply to the
unit.
When electrical wiring is not finished yet
1Temporarily connect electrical wiring.
2Remove the switch box cover (a).
3Connect the single-phase power supply (50 Hz, 230 V) to
connections No. 1 and No. 2 on the terminal block for power
supply and earth.
4Reattach the switch box cover (a).
NL1 2 3
e
ik
l
mn
j
j
f
g
h
ab
cd
aSwitch box cover
bWiring diagram
cPower supply wiring port
dTransmission wiring port
eIndoor PCB 2
fIndoor PCB 3
gIndoor PCB 1
hSwitch box
iPlastic clamp
jPower supply wiring
kPower supply terminal board
lTerminal board for unit transmission wiring
mUser interface wiring
nTransmission wiring between units
5Turn ON the power.
6Start cooling operation (see "8.3 To perform a test run" on
page18).
7Gradually pour approximately 1 l of water through the air
discharge outlet, and check for leaks.
c
e
b
d
a
f
aWater inlet
bPortable pump
cWater inlet cover
dBucket (adding water through water inlet)
eDrain outlet for maintenance
fRefrigerant pipes
8Turn OFF the power.
9Disconnect the electrical wiring.
10 Remove the control box cover.
11 Disconnect the power supply and earth.
12 Reattach the control box cover.

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When electrical wiring is finished already
1Start cooling operation (see "8.3 To perform a test run" on
page18).
2Gradually pour approximately 1 l of water through the air
discharge outlet, and check for leaks (see "When electrical
wiring is not finished yet"on page13).
6.3 Connecting the refrigerant piping
6.3.1 About connecting the refrigerant piping
Before connecting the refrigerant piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting the refrigerant piping to the indoor unit
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
▪ Pipe bending
▪ Flaring pipe ends
▪ Brazing
▪ Using the stop valves
6.3.2 Precautions when connecting the
refrigerant piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF BURNING
CAUTION
▪ Do NOT use mineral oil on flared part.
▪ NEVER install a drier to this unit to guarantee its
lifetime. The drying material may dissolve and damage
the system.
NOTICE
Take the following precautions on refrigerant piping into
account:
▪ Avoid anything but the designated refrigerant to get
mixed into the refrigerant cycle (e.g. air).
▪ Only use R32 or R410A when adding refrigerant. Refer
to the outdoor unit specifications for the type of
refrigerant to be used.
▪ Only use installation tools (e.g. manifold gauge set) that
are exclusively used for R32 or R410A installations to
withstand the pressure and to prevent foreign materials
(e.g. mineral oils and moisture) from mixing into the
system.
▪ Install the piping so that the flare is NOT subjected to
mechanical stress.
▪ Protect the piping as described in the following table to
prevent dirt, liquid or dust from entering the piping.
▪ Use caution when passing copper tubes through walls
(see figure below).
Unit Installation period Protection method
Outdoor unit >1month Pinch the pipe
<1month Pinch or tape the pipe
Indoor unit Regardless of the
period
INFORMATION
Do NOT open the refrigerant stop valve before checking
the refrigerant piping. When you need to charge additional
refrigerant it is recommended to open the refrigerant stop
valve after charging.
6.3.3 Guidelines when connecting the
refrigerant piping
Take the following guidelines into account when connecting pipes:
▪ Coat the flare inner surface with ether oil or ester oil when
connecting a flare nut. Tighten 3 or 4 turns by hand, before
tightening firmly.
▪ ALWAYS use 2 wrenches together when loosening a flare nut.
▪ ALWAYS use a spanner and torque wrench together to tighten the
flare nut when connecting the piping. This to prevent nut cracking
and leaks.
a
b
c
d
aTorque wrench
bSpanner
cPiping union
dFlare nut
Piping size
(mm)
Tightening
torque (N•m)
Flare
dimensions (A)
(mm)
Flare shape
(mm)
Ø9.5 33~39 12.8~13.2
R=0.4~0.8
45°±2
90°±2
A
Ø15.9 63~75 19.3~19.7
6.3.4 Pipe bending guidelines
Use a pipe bender for bending. All pipe bends should be as gentle
as possible (bending radius should be 30~40mm or larger).

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6.3.5 To flare the pipe end
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.
1Cut the pipe end with a pipe cutter.
2Remove burrs with the cut surface facing down so that the
chips do NOT enter the pipe.
a b
aCut exactly at right angles.
bRemove burrs.
3Remove the flare nut from the stop valve and put the flare nut
on the pipe.
4Flare the pipe. Set exactly at the position as shown in the
following figure.
A
Flare tool for
R410A or R32
(clutch type)
Conventional flare tool
Clutch type
(Ridgid-type)
Wing nut type
(Imperial-type)
A 0~0.5mm 1.0~1.5mm 1.5~2.0mm
5Check that the flaring is properly made.
a b
c
aFlare’s inner surface MUST be flawless.
bThe pipe end MUST be evenly flared in a perfect circle.
cMake sure the flare nut is fitted.
6.3.6 To connect the refrigerant piping to the
indoor unit
CAUTION
Install the refrigerating 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.
WARNING: FLAMMABLE MATERIAL
The R32 refrigerant (if applicable) in this unit is mildly
flammable. Refer to the outdoor unit specifications for the
type of refrigerant to be used.
▪Pipe length. Keep refrigerant piping as short as possible.
▪Flare connections. Connect refrigerant piping to the unit using
flare connections.
▪Insulation. Insulate the refrigerant piping on the indoor unit as
follows:
A B
a dc e fb b a dc e fb b
2
4
3g123
4
g
AB
1
AGas piping
BLiquid piping
aInsulation material (field supply)
bCable tie (accessory)
cInsulation pieces: Large (gas pipe), small (liquid pipe)
(accessories)
dFlare nut (attached to the unit)
eRefrigerant pipe connection (attached to the unit)
fUnit
gSealing pads: Medium 1 (gas pipe), medium 2 (liquid pipe)
(accessories)
1Turn up the seams of the insulation pieces.
2Attach to the base of the unit.
3Tighten the cable ties on the insulation pieces.
4Wrap the sealing pad from the base of the unit to the top of
the flare nut.
NOTICE
Make sure to insulate all refrigerant piping. Any exposed
piping might cause condensation.
6.4 Connecting the electrical wiring
6.4.1 About connecting the electrical wiring
Typical workflow
Connecting the electrical wiring typically consists of the following
stages:
1 Making sure the power supply system complies with the
electrical specifications of the units.
2 Connecting the electrical wiring to the outdoor unit.
3 Connecting the electrical wiring to the indoor unit.
4 Connecting the main power supply.
6.4.2 Precautions when connecting the
electrical wiring
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
Use an all-pole disconnection type breaker with at least
3 mm between the contact point gaps that provide full
disconnection under overvoltage category III.
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.

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WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
6.4.3 Guidelines when connecting the electrical
wiring
Keep the following in mind:
▪ If stranded conductor wires are used, install a round crimp-style
terminal on the end of the wire. Place the round crimp-style
terminal on the wire up to the covered part and fasten the terminal
with the appropriate tool.
b a
aStranded conductor wire
bRound crimp-style terminal
▪ Use the following methods for installing wires:
Wire type Installation method
Single-core wire
c b
c
aa
A
AA´
A´
a Curled single-core wire
b Screw
c Flat washer
Stranded conductor
wire with round
crimp-style terminal
c b ba c
a
B
B
a Terminal
b Screw
c Flat washer
O Allowed
X NOT allowed
6.4.4 Specifications of standard wiring
components
Component FDA125A
Power supply
cable
MCA(a) 2.1 A
Voltage 220~240V
Phase 1~
Frequency 50/60Hz
Wire sizes Must comply with applicable
legislation
Interconnection cable
(indoor↔outdoor)
4-core cable 1.5 mm2~2.5 mm2
and applicable for 220~240 V
H05RN-F (60245 IEC 57)
User interface cable Vinyl cord with 0.75 to 1.25mm2
sheath or cables (2 core wires)
Maximum 500m
H03VV-F (60227 IEC 52)
Component FDA125A
Recommended field fuse 16A
Earth leakage circuit breaker Must comply with applicable
legislation
(a) MCA=Minimum circuit ampacity. Stated values are
maximum values (see electrical data of combination with
indoor units for exact values).
6.4.5 To connect the electrical wiring on the
indoor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located on the switch box cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wirings should ALWAYS be
at least 50mm.
NOTICE
Be sure to keep the power line and transmission line apart
from each other. Transmission wiring and power supply
wiring may cross, but may NOT run parallel.
1Remove the service cover.
2 User interface cable: Route the cable through the frame,
connect the cable to the terminal block, and fix the cable with a
cable tie.
3 Interconnection cable (indoor↔outdoor): Route the cable
through the frame, connect the cable to the terminal block
(make sure the numbers match with the numbers on the
outdoor unit, and connect the earth wire), and fix the cable with
a cable tie.
4Divide the small sealing (accessory) and wrap it around the
cables to prevent water from entering the unit. Seal all gaps to
prevent small animals from entering the system.
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.
5Reattach the service cover.
▪When using 1 user interface with 1 indoor unit.

7 Configuration
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1 2 3
a a a
b
c
1 2 3
P
1
P
2
P
1
P
2
d
1 2
L N
3
b
c
b
c
1 2 3
P
1
P
2
P
1
P
2
d
L N L N
L N
▪When using 2 user interfaces3
1 2 3
b
c
1 2 3
P
1
P
2
P
1
P
2
P
1
P
2
d d
a
L N
b
c
a
L N
▪When using group control3
b
c
P
1
P
2
d
P
1
P
2
P
1
P
2
P
1
P
2
a
1 2 3 L N
1 2 3
1 2 3 L N
1 2 3
1 2 3 L N
1 2 3
b
c
a
b
c
a
b
c
a
b
c
a
b
c
a
L N L N
L N
aPower supply
bMain switch
cFuse
dUser interface
▪Master unit: Be sure to connect the wiring when combining with a
simultaneously operating multi-type in group control.
▪EN/IEC 61000‑3‑12 provided that the short-circuit power Ssc is
greater than or equal to the minimum Ssc value at the interface
point between the user's supply and the public system.
▪ EN/IEC 61000‑3‑12 = European/International Technical
Standard setting the limits for harmonic currents produced by
equipment connected to public low-voltage systems with input
current >16A and ≤75A per phase.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a short-circuit power Ssc greater than or equal to the
minimum Ssc value.
To comply with EN/IEC 61000‑3‑12, following rules must be
considered:
▪ In case of combination of units 2x FDA125A + RZQ250, use
separate power supplies.
NL21 3
▪ Otherwise, refer to the table with Ssc values for FDA125A on the
extranet.
▪ If the Ssc value is NOT mentioned in the table for the used
combination, use the common power supply wire delivered with
the unit.
▪ If the Ssc value is mentioned in the table, both the common
power supply wire or a separate power supply can be used, but
a separate power supply is preferred.
L N21 3
a
aWire for common power supply (accessory)
INFORMATION
In case of group control it is not necessary to assign an
address to the indoor unit. The address is automatically set
when the power is activated.
7 Configuration
7.1 Field settings
Make the following field settings so that they correspond with the
actual installation setup and with the needs of the user:
▪ External static pressure setting using:
▪ Airflow automatic adjustment setting
▪ User interface
▪ Time to clean air filter
To set airflow automatic adjustment
▪ When the air conditioning unit is running in fan operation mode:
1Stop the air conditioning unit.
2Set second code number to 03.
(3) Dashed line represents separate power supply.

8 Commissioning
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Setting content: Then4
M C1 C2
Airflow adjustment is OFF 11(21) 7 01
Press ON/OFF to return to normal operating
mode.
Possible consequence: The operation lamp
will light up and the unit will start the fan
operation for airflow automatic adjustment.
03
Operation stops after 1 to 8 minutes.
Possible consequence: Setting is finished
and the operation lamp will be off.
02
If there is no change after airflow adjustment, perform the setting
again.
User interface
Check the indoor unit setting: the second code number of mode
11(21) must be set to 01.
Change the second code number according to the external static
pressure of the duct to be connected as in table below.
M C1 C2 External static pressure
13(23) 6 01 40
02 50
03 60
04 70
05 80
06 90
07 100
08 110
09 120
10 130
11 140
12 150
13 160
14 180
15 200
Time to clean air filter
This setting must correspond with the air contamination in the room.
It determines the interval at which the TIME TO CLEAN AIR FILTER
notification is displayed on the user interface. When using a wireless
user interface, you must also set the address (see the installation
manual of the user interface).
If you want an interval of…
(air contamination)
Then4
M C1 C2
±2500h (light) 10(20) 0 01
±1250h (heavy) 02
No notification 3 02
▪2 user interfaces: When using 2 user interfaces, one must be set
to "MAIN" and the other to "SUB".
8 Commissioning
8.1 Overview: Commissioning
This chapter describes what you have to do and know to
commission the system after it is installed.
Typical workflow
Commissioning typically consists of the following stages:
1 Checking the "Checklist before commissioning".
2 Performing a test run for the system.
8.2 Checklist before commissioning
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit MUST be closed, ONLY then
can the unit be powered up.
You read the complete installation instructions, as
described in the installer reference guide.
The indoor units are properly mounted.
In case a wireless user interface is used: The indoor unit
decoration panel with infrared receiver is installed.
The outdoor unit is properly mounted.
There are NO missing phases or reversed phases.
The system is properly earthed and the earth terminals
are tightened.
The fuses or locally installed protection devices are
installed according to this document, and have NOT been
bypassed.
The power supply voltage matches the voltage on the
identification label of the unit.
There are NO loose connections or damaged electrical
components in the switchbox.
The insulation resistance of the compressor is OK.
There are NO damaged components or squeezed
pipes on the inside of the indoor and outdoor units.
There are NO refrigerant leaks.
The correct pipe size is installed and the pipes are
properly insulated.
The stop valves (gas and liquid) on the outdoor unit are
fully open.
8.3 To perform a test run
This task is only applicable when using the BRC1E52 or BRC1E53
user interface. When using any other user interface, see the
installation manual or service manual of the user interface.
NOTICE
Do not interrupt the test run.
(4) Field settings are defined as follows:
▪M: Mode number – First number: for group of units – Number between brackets: for individual unit
▪C1: First code number
▪C2: Second code number
▪ : Default

9 Hand-over to the user
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INFORMATION
Backlight. To perform an ON/OFF action on the user
interface, the backlight does not need to be lit. For any
other action, it needs to be lit first. The backlight is lit for
±30seconds when you press a button.
1Perform introductory steps.
# Action
1 Open the liquid stop valve (A) and gas stop valve (B)
by removing the stem cap and turning
counterclockwise with a hex wrench until it stops.
A B
2 Close the service cover to prevent electric shocks.
3 Turn ON power for at least 6hours before starting
operation to protect the compressor.
4 On the user interface, set the unit to cooling operation
mode.
2Start the test run
# Action Result
1 Go to the home menu.
Cool
Set to
28°C
2 Press at least 4seconds. The Service Settings menu
is displayed.
3 Select Test Operation.
Return Setting
Service Settings 1/3
Test Operation
Maintenance Contact
Field Settings
Demand
Min Setpoints Differential
Group Address
4 Press. Test Operation is
displayed on the home
menu.
Cool
Return Setting
Test Operation
5 Press within 10seconds. Test run starts.
3Check operation for 3minutes.
4Stop the test run.
# Action Result
1 Press at least 4seconds. The Service Settings menu
is displayed.
# Action Result
2 Select Test Operation.
Return Setting
Service Settings 1/3
Test Operation
Maintenance Contact
Field Settings
Demand
Min Setpoints Differential
Group Address
3 Press. The unit returns to normal
operation, and the home
menu is displayed.
8.4 Error codes when performing a
test run
If the installation of the outdoor unit has NOT been done correctly,
the following error codes may be displayed on the user interface:
Error code Possible cause
Nothing displayed
(the currently set
temperature is not
displayed)
▪ The wiring is disconnected or there is a
wiring error (between power supply and
outdoor unit, between outdoor unit and
indoor units, between indoor unit and
user interface).
▪ The fuse on the outdoor or indoor unit
PCB has blown.
E3, E4 or L8 ▪ The stop valves are closed.
▪ The air inlet or air outlet is blocked.
E7 There is a missing phase in case of three-
phase power supply units.
Note: Operation will be impossible. Turn
OFF the power, recheck the wiring, and
switch two of the three electrical wires.
L4 The air inlet or air outlet is blocked.
U0 The stop valves are closed.
U2 ▪ There is a voltage imbalance.
▪ There is a missing phase in case of
three-phase power supply units. Note:
Operation will be impossible. Turn OFF
the power, recheck the wiring, and switch
two of the three electrical wires.
U4 or UF The inter-unit branch wiring is not correct.
UA The outdoor and indoor unit are
incompatible.
9 Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation at the URL mentioned earlier in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
▪ Show the user what to do for the maintenance of the unit.

10 Disposal
Installer and user reference guide
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10 Disposal
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
11 Technical data
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
extranet (authentication required).
11.1 Wiring diagram
11.1.1 Unified wiring diagram legend
For applied parts and numbering, refer to the wiring diagram on the
unit. Part numbering is by Arabic numbers in ascending order for
each part and is represented in the overview below symbol "*" in the
part code.
Symbols:
Circuit breaker Protective earth
Connection Protective earth (screw)
,
Connector
A
Rectifier
Earth Relay connector
Field wiring Short-circuit connector
Fuse Terminal
INDOOR
Indoor unit Terminal strip
OUTDOOR
Outdoor unit Wire clamp
Colors:
BLK Black ORG Orange
BLU Blue PNK Pink
BRN Brown PRP, PPL Purple
GRN Green RED Red
GRY Grey WHT White
YLW Yellow
Legends:
A*P Printed circuit board
BS* Pushbutton ON/OFF, operation
switch
BZ, H*C Buzzer
C* Capacitor
AC*, CN*, E*, HA*, HE*, HL*,
HN*, HR*, MR*_A, MR*_B, S*,
U, V, W, X*A, K*R_*
Connection, connector
D*, V*D Diode
DB* Diode bridge
DS* Dip switch
E*H Heater
FU*, F*U, (for characteristics,
refer to PCB inside your unit)
Fuse
FG* Connector (frame ground)
H* Harness
H*P, LED*, V*L Pilot lamp, light emitting diode
HAP Light emitting diode (service
monitor green)
HIGH VOLTAGE High voltage
IES Intelligent eye sensor
IPM* Intelligent power module
K*R, KCR, KFR, KHuR, K*M Magnetic relay
L Live
L* Coil
L*R Reactor
M* Stepper motor
M*C Compressor motor
M*F Fan motor
M*P Drain pump motor
M*S Swing motor
MR*, MRCW*, MRM*, MRN* Magnetic relay
N Neutral
n=*, N=* Number of passes through ferrite
core
PAM Pulse-amplitude modulation
PCB* Printed circuit board
PM* Power module
PS Switching power supply
PTC* Thermistor PTC
Q* Insulated gate bipolar transistor
(IGBT)
Q*DI Earth leak circuit breaker
Q*L Overload protector
Q*M Thermo switch
R* Resistor
R*T Thermistor
RC Receiver
S*C Limit switch
S*L Float switch
S*NPH Pressure sensor (high)
S*NPL Pressure sensor (low)
S*PH, HPS* Pressure switch (high)
S*PL Pressure switch (low)
S*T Thermostat
S*RH Humidity sensor
S*W, SW* Operation switch
SA*, F1S Surge arrestor
SR*, WLU Signal receiver
SS* Selector switch
SHEET METAL Terminal strip fixed plate
T*R Transformer
TC, TRC Transmitter
V*, R*V Varistor
V*R Diode bridge
WRC Wireless remote controller
X* Terminal