Daikin FXFQ20BVEB, FXFQ25BVEB, FXFQ32BVEB, FXFQ40BVEB, FXFQ50BVEB Installer reference guide

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Installer and user

reference guide

VRV system air conditioner

FXFQ20BVEB FXFQ25BVEB FXFQ32BVEB FXFQ40BVEB FXFQ50BVEB FXFQ63BVEB FXFQ80BVEB FXFQ100BVEB FXFQ125BVEB

Installer and user reference guide

VRV system air conditioner

English

Table of contents

1 General safety precautions 3

1.1 About the documentation .......................................................... 3

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 8

3 About the box 8

3.1 Overview: About the box ........................................................... 8

3.2 Indoor unit ................................................................................. 8

3.2.1 To unpack and handle the unit.................................... 8

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 Identification .............................................................................. 8

4.2.1 Identification label: Indoor unit .................................... 9

4.3 System layout............................................................................ 9

4.4 Combining units and options ..................................................... 9

4.4.1 Possible options for the indoor unit............................. 9

5 Preparation 9

5.1 Overview: Preparation............................................................... 9

5.2 Preparing the installation site .................................................... 9

5.2.1 Installation site requirements of the indoor unit .......... 9

5.3 Preparing refrigerant piping....................................................... 10

5.3.1 Refrigerant piping requirements.................................. 10

5.3.2 Refrigerant piping insulation ....................................... 11

5.4 Preparing electrical wiring ......................................................... 11

5.4.1 About preparing electrical wiring................................. 11

6 Installation 11

6.1 Overview: Installation ................................................................ 11

6.2 Mounting the indoor unit............................................................ 11

6.2.1 Precautions when mounting the indoor unit................ 11

6.2.2 Guidelines when installing the indoor unit................... 11

6.2.3 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.............................................. 15

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 ..... 16

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 Precautions when commissioning .............................................. 19

8.3 Checklist before commissioning................................................. 19

8.4 To perform a test run.................................................................. 19

8.5 Error codes when performing a test run ..................................... 20

9 Hand-over to the user 20

10 Disposal 20

11 Technical data 20

11.1 Piping diagram: Indoor unit ........................................................ 21

11.2 Wiring diagram ........................................................................... 21

11.2.1 Unified wiring diagram legend...................................... 21

For the user 22

12 About the system 22

12.1 System layout ............................................................................. 22

12.2 Information requirements for fan coil units ................................. 22

13 User interface 22

14 Before operation 22

15 Operation 23

15.1 Operating the system ................................................................. 23

15.1.1 About operating the system ......................................... 23

15.1.2 About cooling, heating, fan only, and automatic

operation ...................................................................... 23

15.1.3 About the heating operation ......................................... 23

15.1.4 To operate the system ................................................. 23

15.2 Using the dry program ................................................................ 23

15.2.1 About the dry program ................................................. 23

15.2.2 To use the dry program................................................ 23

15.3 Adjusting the air flow direction.................................................... 24

15.3.1 About the air flow flap .................................................. 24

15.4 Active circulation airflow ............................................................. 24

15.4.1 To start the active circulation airflow ............................ 24

16 Energy saving and optimum operation 24

17 Maintenance and service 25

17.1 Precautions for maintenance and service .................................. 25

17.2 Cleaning the air filter, suction grille, air outlet and outside

panels......................................................................................... 25

17.2.1 To clean the air filter .................................................... 25

17.2.2 To clean the suction grille ............................................ 26

17.2.3 To clean the air outlet and outside panels ................... 26

17.3 Maintenance after a long stop period ......................................... 26

17.4 Maintenance before a long stop period ...................................... 26

17.5 About the refrigerant................................................................... 26

17.6 After-sales service and warranty ................................................ 27

17.6.1 Warranty period ........................................................... 27

17.6.2 Recommended maintenance and inspection ............... 27

17.6.3 Recommended maintenance and inspection cycles .... 27

17.6.4 Shortened maintenance and replacement cycles ........ 27

18 Troubleshooting 27

18.1 Symptoms that are NOT system malfunctions ........................... 28

18.1.1 Symptom: The system does not operate ..................... 28

18.1.2 Symptom: The fan speed does not correspond to the

setting .......................................................................... 28

18.1.3 Symptom: The fan direction does not correspond to

the setting .................................................................... 28

18.1.4 Symptom: White mist comes out of a unit (Indoor

unit) .............................................................................. 28

18.1.5 Symptom: White mist comes out of a unit (Indoor

unit, outdoor unit) ......................................................... 28

18.1.6 Symptom: The user interface display reads "U4" or

"U5" and stops, but then restarts after a few minutes.. 28

18.1.7 Symptom: Noise of air conditioners (Indoor unit) ......... 28

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

1 General safety precautions

18.1.8 Symptom: Noise of air conditioners (Indoor unit,

outdoor unit)................................................................ 29

18.1.9 Symptom: Noise of air conditioners (Outdoor unit) ..... 29

18.1.10 Symptom: Dust comes out of the unit ......................... 29

18.1.11 Symptom: The units can give off odours..................... 29

18.1.12 Symptom: The outdoor unit fan does not spin ............ 29

18.1.13 Symptom: The display shows "88".............................. 29

18.1.14 Symptom: The compressor in the outdoor unit does

not stop after a short heating operation ...................... 29

19 Relocation 29

20 Disposal 29

21 Glossary 29

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.

1.1.1 Meaning of warnings and symbols

Symbol Explanation

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:

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.

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

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.

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

1.3.1 General

If you are NOT sure how to install or operate the unit, contact your dealer.

Installer and user reference guide

1 General safety precautions

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.

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

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

To determine the minimum floor area

Contains fluorinated greenhouse gases

tCO2eq

1000

GWP × kg

GWP: xxx

R32

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

360

370

380

390

400

410

420

430

440

450

460

470

480

490

500

510

520

530

540

550

1.822.2

2.4

2.6

2.833.2

3.4

3.6

3.844.2

4.4

4.6

4.855.2

5.4

5.6

5.866.2

6.4

6.6

6.877.2

7.4

7.6

7.8

1.843 7.956

8.0

min

(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)

min

(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)

min

(m2)

Floor-standing

unit

(c)

m (kg)

min

(m2)

1 Determine the total refrigerant charge in the system (=factory

refrigerant charge + additional refrigerant amount charged).

2 Determine 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

3 Use the graph or table to determine the minimum floor area.

1 General safety precautions

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

m Total refrigerant charge in the system

Minimum floor area

min

(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.

Installer and user reference guide

1 General safety precautions

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 re-charge is required, refer to 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.

▪ 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")

A siphon tube is NOT present Charge with the cylinder upside

Charge with the cylinder upright.

down.

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.

▪ Open refrigerant cylinders slowly.

▪ Charge the refrigerant in liquid form. Adding it in gas form may

prevent normal operation.

Installer and user reference guide

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.

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

2 About the documentation

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.

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

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 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).

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

Installer and user reference guide

3 About the box

1 2

8× 4×1×1× 1×

4×1×

1×

7×

1×

e fdcb

h ji

l m

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.

It contains information about:

▪ Unpacking and handling the unit

▪ Removing the accessories from the unit

Keep the following in mind:

▪ At delivery, the unit MUST be checked for damage. Any damage

MUST be reported immediately to the carrier's claims agent.

▪ 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

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.

3.2.2 To remove the accessories from the indoor unit

a Paper pattern for installation (upper part of packing) b General safety precautions c Indoor unit installation and operation manual d Installation guide e Washers for hanger brackets

f Screws (to temporarily attach the paper pattern for

installation to the indoor unit)

g Cable ties h Metal clamp

i Insulation piece (drain pipe) j Sealing pads: Large (drain pipe), medium 1 (gas pipe),

medium 2 (liquid pipe), small (electrical wiring)

k Drain hose

l Insulation piece: Small (liquid pipe)

m Insulation piece: Large (gas pipe)

4 About the units and options

4.1 Overview: About the units and options

This chapter contains information about:

▪ Identifying the indoor unit

▪ Combining outdoor and indoor units

▪ Combining the indoor unit with options

INFORMATION

For year‑round cooling applications with low indoor humidity conditions, such as Electronic Data Processing rooms, contact your dealer or see the engineering databook or the service manual.

4.2 Identification

NOTICE

When installing or servicing several units at the same time, make sure NOT to switch the service panels between different models.

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

5 Preparation

df e

(mm)

≥

1500

≥

1500

≥

1000≥1000

≥

1000≥1000

4.2.1 Identification label: Indoor unit

Location

4.3 System layout

NOTICE

Design of the system must not be done at temperatures below –15°C.

a Indoor unit b Outdoor unit c User interface d Suction air e Discharge air

f Refrigerant piping + interconnection cable g Drain pipe h Earth wiring

i Suction grille and air filter

4.4 Combining units and options

4.4.1 Possible options for the indoor unit

Make sure you have the following mandatory options:

▪ User interface: Wired or wireless

▪ Decoration panel: Standard, self-cleaning or design

▪ Preparing the electrical wiring

5.2 Preparing the installation site

Do NOT install the unit in places often used as work place. In case of construction works (e.g. grinding works) where a lot of dust is created, the unit MUST be covered.

Choose an installation location with sufficient space for carrying the unit in and out of the site.

5.2.1 Installation site requirements of the indoor unit

INFORMATION

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

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

a Earth leakage protector b Fuse c Outdoor unit d Indoor unit e User interface

f Personal computer or radio

Installer and user reference guide

5 Preparation

a b c

(mm)

≥1500

≥

2000

≥

4000

≥1500

ba dac

≥1500 ≥500 ≥200

A A A

b c

In places with weak reception, keep distances of 3 m or more to avoid electromagnetic disturbance of other equipment and use conduit tubes for power and transmission lines.

▪ 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.

▪ Air flow. Make sure nothing blocks the air flow.

▪ Drainage. Make sure condensation water can be evacuated

properly.

▪ Paper pattern for installation (upper part of packing)

(accessory). When selecting the installation location, use the paper pattern. It contains the dimensions of the unit and the required ceiling opening.

▪ Air flow directions. You can select different air flow directions.

Choose the one best suited for the room. Also make sure the "Air flow direction" field setting corresponds with the actual situation (see "7.1Field settings"on page17).

Example:

≥298mm: In case of installation with standard decoration

panel ≥340mm: In case of installation with design decoration

panel

≥348mm: In case of installation with fresh air intake kit ≥378mm: In case of installation with self-cleaning

decoration panel

a Indoor unit b Lighting (the figure shows ceiling-mounted lighting, but

recessed lighting is also allowed)

c Air fan d Static volume (example: table)

▪ A: Minimum distance to the wall. Depends on the air flow

directions towards the wall.

a Air outlet and corners open b Air outlet closed, corners open (optional blocking pad kit

required)

c Air outlet and corners closed (optional blocking pad kit

required)

▪ B: Minimum and maximum distance to the floor:

▪ Minimum: 2.7m to avoid accidental touching.

▪ Maximum: Depends on the air flow directions and the capacity

class. Also make sure the "Ceiling height" field setting corresponds with the actual situation. See "7.1 Field

settings"on page17.

a All-round air flow

b 4-way air flow (with closed corners) (optional blocking pad

kit required)

c 3-way air flow (optional blocking pad kit required)

▪ 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).

▪ Spacing. Mind the following requirements:

A Minimum distance to the wall (see below) B Minimum and maximum distance to the floor (see below) C 20~63 class:

≥214mm: In case of installation with standard decoration

panel ≥256mm: In case of installation with design decoration

panel ≥294mm: In case of installation with self-cleaning

decoration panel

≥263mm: In case of installation with fresh air intake kit 80~100 class: ≥256mm: In case of installation with standard decoration

panel ≥298mm: In case of installation with design decoration

panel

≥306mm: In case of installation with fresh air intake kit ≥316mm: In case of installation with self-cleaning

decoration panel

125 class:

If air flow direction… Then B

FXFQ20~100 FXFQ125

All-round ≤3.5m ≤4.2m

(a)

4-way

3-way

(a)

(a) Optional blocking kit required

≤4.0m ≤4.5m

≤3.5m ≤4.2m

5.3 Preparing refrigerant piping

5.3.1 Refrigerant piping requirements

INFORMATION

Also read the precautions and requirements in the "General safety precautions" chapter.

Refrigerant piping diameter

Use the same diameters as the connections on the outdoor units:

Class L1 liquid piping L1 gas piping

20~50 Ø6.4mm Ø12.7mm

63~125 Ø9.5mm 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

Temper grade Thickness (t)

(Ø)

6.4mm (1/4") Annealed (O) ≥0.8mm

9.5mm (3/8")

12.7mm (1/2")

15.9mm (5/8")

(a)

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

6 Installation

(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.

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

Ambient

temperature

≤30°C 75% to 80% RH 15mm

>30°C ≥80% RH 20mm

Humidity Minimum thickness

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

Typical workflow

Installation typically consists of the following stages:

1 Mounting the outdoor unit.

2 Mounting the indoor unit (+ decoration panel).

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 decoration panel

NOTICE

After installing the decoration panel:

▪ Make sure there is no gap between the unit body and

the decoration panel. Possible consequence: Air might leak and cause dew drop.

▪ Make sure no oil remains on the plastic parts of the

decoration panel. Possible consequence: Degradation and damage of plastic parts.

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 a fresh air intake kit. Install the

fresh air intake kit always before installing the unit.

▪ Decoration panel. Install the decoration panel always after

installing the unit.

▪ 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.

▪ For existing ceilings, use anchors.

▪ For new ceilings, use sunken inserts, sunken anchors or other

field supplied parts.

6.1 Overview: Installation

This chapter describes what you have to do and know on-site to install the system.

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

A 50~100mm: In case of installation with standard panel

Installer and user reference guide

6 Installation

(mm)

780

710

a1 b

b a2

4×

a cb d

(mm)

710

840

860~910

950

c d

780

840

860~910

950

cde

A B

b c

bba

100~150mm: In case of installation with fresh air intake kit or design panel

130~180mm: In case of installation with self-cleaning decoration panel

a Ceiling slab b Anchor c Long nut or turnbuckle d Suspension bolt e Suspended ceiling

▪ Suspension bolts. Use M8~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.

a1 Nut (field supply) a2 Double nut (field supply)

b Washer (accessories) c Hanger bracket (attached to the unit)

▪ Paper pattern for installation (upper part of the packing). Use

the paper pattern to determine the correct horizontal positioning. It contains the necessary dimensions and centers. You can attach the paper pattern to the unit.

d Unit e Ceiling opening

f Decoration panel

If A Then

B C

≥860mm 10mm 45mm

≤910mm 35mm 20mm

A Ceiling opening B Distance between the unit and the ceiling opening C Overlap between the decoration panel and the suspended

ceiling

▪ Installation guide. Use the installation guide to determine the

correct vertical position.

a Centre of the unit b Centre of the ceiling opening c Paper pattern for installation (upper part of the packing) d Screws (accessories)

▪ Ceiling opening and unit:

▪ Make sure the ceiling opening is within the following limits:

Minimum: 860mm to be able to fit the unit.

Maximum: 910 mm to ensure enough overlap between the

decoration panel and the suspended ceiling. If the ceiling opening is larger, add extra ceiling material.

▪ Make sure the unit and its hanger brackets (suspension) are

centered within the ceiling opening.

Installer and user reference guide

a Drain piping b Refrigerant piping c Hanger bracket pitch (suspension)

A In case of installation with standard decoration panel B In case of installation with fresh air intake kit C In case of installation with self-cleaning decoration panel D In case of installation with design decoration panel

a Suspended ceiling b Installation guide (accessory) c Unit

▪ Level. Make sure the unit is level at all 4 corners using a level or a

water-filled vinyl tube.

a Level b Vinyl tube c Water level

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.

6.2.3 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

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

6 Installation

1~1.5 m

≤675

≤300

0~75

1000~1500

(mm)

b c

≥100

≤675

(mm)

≤4 mm

A-A'

652

b a

d c

2~61

N L

General guidelines

▪ 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.

a Hanging bar O Allowed X Not allowed

▪ 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, ≤675mm perpendicular

to the unit.

a Metal clamp (accessory)

b Drain hose (accessory)

c Rising drain piping (vinyl pipe of 25mm nominal diameter

and 32mm outer diameter) (field supply)

d Hanging bars (field supply)

▪ Condensation. Take measures against condensation. Insulate

the complete drain piping in the building.

▪ Combining drain pipes. You can combine drain pipes. Make

sure to use drain pipes and T-joints with a correct gauge for the operating capacity of the units.

4 Install the insulation piece (drain pipe).

5 Wind the large sealing pad (= insulation) around the metal

clamp and drain hose, and fix it with cable ties.

6 Connect the drain piping to the drain hose.

a Drain pipe connection (attached to the unit) b Drain hose (accessory) c Metal clamp (accessory) d Large sealing pad (accessory) e Insulation piece (drain pipe) (accessory)

f Drain piping (field supply)

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

1 Temporarily connect electrical wiring.

▪ Remove the switch box cover (a). ▪ Connect the user interface and transmission wiring (b). ▪ Connect the power supply (1~ 220-240 V 50/60 Hz) and

earth (c).

▪ Reattach the switch box cover (a).

a T-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.

1 Push the drain hose as far as possible over the drain pipe

connection.

2 Tighten the metal clamp until the screw head is less than 4mm

from the metal clamp part.

3 Check for water leaks (see "To check for water leaks" on

page13).

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

2 Turn ON the power.

3 Start cooling operation (see "8.4 To perform a test run" on

page19).

4 Gradually pour approximately 1 l of water through the air

discharge outlet, and check for leaks.

Installer and user reference guide

6 Installation

≥100 mm

e d

a Plastic watering can b Service drain outlet (with rubber plug). Use this outlet to

drain water from the drain pan.

c Drain pump location d Drain pipe connection e Drain pipe

5 Turn OFF the power.

6 Disconnect the electrical wiring.

▪ Remove the switch box cover. ▪ Disconnect the power supply and earth. ▪ Disconnect the user interface. ▪ Reattach the switch box cover.

When electrical wiring is finished already

1 Start cooling operation (see "8.4 To perform a test run" on

page19).

2 Gradually 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).

CAUTION

▪ Do NOT use mineral oil on flared part.

▪ Do NOT reuse piping from previous installations.

▪ NEVER install a drier to this R410A 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 R410A when adding refrigerant.

▪ Only use installation tools (e.g. manifold gauge set) that

are exclusively used for 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).

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 indoor unit

▪ Connecting the refrigerant piping to the outdoor unit

▪ Insulating the refrigerant piping

▪ Keeping in mind the guidelines for:

▪ Pipe bending

▪ Flaring pipe ends

▪ 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

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.

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

a Torque wrench

R=0.4~0.8

45°

±2

90°

±2

a b

A B

a dc e fb b

b Spanner c Piping union d Flare nut

Piping size

(mm)

Tightening

torque (N•m)

Flare

dimensions (A)

Flare shape

(mm)

Ø6.4 15~17 8.7~9.1

Ø9.5 33~39 12.8~13.2

Ø12.7 50~60 16.2~16.6

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).

6.3.5 To flare the pipe end

6 Installation

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.

▪ 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:

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.

1 Cut the pipe end with a pipe cutter.

2 Remove burrs with the cut surface facing down so that the

chips do NOT enter the pipe.

a Cut exactly at right angles. b Remove burrs.

3 Remove the flare nut from the stop valve and put the flare nut

on the pipe.

4 Flare the pipe. Set exactly at the position as shown in the

following figure.

Flare tool for

R410A (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

5 Check that the flaring is properly made.

A Gas piping B Liquid piping

a Insulation material (field supply) b Cable tie (accessory) c Insulation pieces: Large (gas pipe), small (liquid pipe)

(accessories)

d Flare nut (attached to the unit) e Refrigerant pipe connection (attached to the unit)

f Unit

g Sealing pads: Medium 1 (gas pipe), medium 2 (liquid pipe)

(accessories)

1 Turn up the seams of the insulation pieces. 2 Attach to the base of the unit. 3 Tighten the cable ties on the insulation pieces. 4 Wrap 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.

a Flare’s inner surface MUST be flawless. b The pipe end MUST be evenly flared in a perfect circle. c Make sure the flare nut is fitted.

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

Installer and user reference guide

6 Installation

b a

c b

AA´

A´

c b ba c

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.

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.

Tightening torques

Wiring Screw size Tightening torque

(N•m)

Interconnection cable (indoor↔outdoor)

User interface cable M3.5 0.79~0.97

M4 1.18~1.44

6.4.4 Specifications of standard wiring components

Component Class

20~40 50 63 80 100 125

Power supply cable

Interconnection cable 4-core cable 1.5mm2~2.5mm2 and

User interface cable Vinyl cords with 0.75 to 1.25mm² sheath

Recommended field fuse 16A

Earth leakage circuit breaker

(a)

MCA

Voltage 220~240V

Phase 1~

Frequency 50/60Hz

Wire sizes 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).

0.5A 0.6A 0.7A 1.2A1.3A 1.4A

applicable for 220~240V

H05RN-F (60245 IEC 57)

or cables (2‑core wires)

Maximum 500m

H03VV-F (60227 IEC 52)

Must comply with applicable legislation

a Stranded conductor wire b Round crimp-style terminal

▪ Use the following methods for installing wires:

Wire type Installation method

Single-core wire

a Curled single-core wire

b Screw

c Flat washer

Stranded conductor wire with round crimp-style terminal

a Terminal

b Screw

c Flat washer

O Allowed

X NOT allowed

6.4.5 To connect the electrical wiring on the indoor unit

NOTICE

▪ Follow the wiring diagram (delivered with the unit,

located at the inside of the service cover).

▪ For instructions on how to connect the decoration panel

and the sensor kit, see the installation manual delivered with the panel or the kit.

▪ 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.

1 Remove 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.

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

4 Divide the small sealing (accessory) and wrap it around the

IN/D OUT/D

1 F2

Control box

F1 F2

P1P

F1F2T1T

P1P

F1F2T1T

P1P

F1F2T1T

2 LNP1P2

P1P

F1F2T1T

L N L N L N

IN/D OUT/D

1 F2 F1 F2

Control box

P1P

F1F2T1T

2 LNP1P2F1F2T1T2 LNP1P2F1F2T1T2

P1P

P1P2F1F2T1T

P1P

L N

IN/D OUT/D

1 F2 F1 F2

Control box

IN/DOUT/D

1 F2 F1 F2

Control box

P1P

P1P2F1F2T1T

(mm)

10~15

70~90

10~20

10~15

70~90

N L

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.

5 Reattach the service cover.

NOTICE

When closing the service cover, make sure that the tightening torque for screws is ≤1.5N•m.

Wiring example

7 Configuration

▪ When including BS unit (only REYQ).

a Outdoor unit b Indoor unit c User interface d Most downstream indoor unit e For use with 2 user interfaces

f BS unit

a Power supply b Main switch c Power supply wiring d Unit interconnection wiring e Switch

f Fuse g BS unit (only REYQ) h Indoor unit

i User interface

Complete system example

▪ When 1 user interface controls 1 indoor unit.

a Service cover (with wiring diagram on the back) b Opening for cables c Connection of power supply (including earth) d Cable tie e Connection of user interface and interconnection cable

▪ Group control or use with 2 user interfaces.

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

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:

▪ Ceiling height

▪ Design decoration panel (if applicable)

▪ Air flow direction

Installer and user reference guide

8 Commissioning

a b c

▪ Air volume when thermostat control is OFF

▪ Time to clean air filter

Setting: Ceiling height

This setting must correspond with the actual distance to the floor, capacity class and air flow directions.

▪ For 3-way and 4-way air flows (which require an optional blocking

pad kit), see the installation manual of the optional blocking pad kit.

▪ For all-round air flow, use the table below.

If the distance to the floor is (m) Then

FXFQ20~100 FXFQ125 M C1 C2

≤2.7 ≤3.2 13 (23) 0 01

2.7<x≤3.0 3.2<x≤3.6 02

3.0<x≤3.5 3.6<x≤4.2 03

Setting: Decoration panel type

When installing or changing the decoration panel type, ALWAYS check if the correct values are set.

If the … decoration panel is used Then

M C1 C2

Standard or self-cleaning 13

Design 02

(23)

Setting: Air flow direction

This setting must correspond with the actual used air flow directions. See the installation manual of the optional blocking pad kit and the manual of the user interface.

Default: 01 (= all-round air flow)

Example:

a All-round air flow b 4-way air flow (all air outlets open, 2 corners closed)

(optional blocking pad kit required)

c 3-way air flow (1 air outlet closed, all corners open)

(optional blocking pad kit required)

Setting: Air volume when thermostat control is OFF

This setting must correspond with the needs of the user. It determines the fan speed of the indoor unit during thermostat OFF condition.

1 If you have set the fan to operate, set the air volume speed:

If you want Then

Outdoor unit M C1 C2

During cooling operation

(1)

Setup volume

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

(2)

Fan speed:

▪ LL: Low fan speed

▪ Setup volume: The fan speed corresponds to the speed the user has set (low, medium, high) using the fan speed button

on the user interface.

Installer and user reference guide

(22)

15 01

6 01

If you want Then

Outdoor unit M C1 C2

During heating operation

Setup volume

(22)

3 01

Setting: 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)

M C1 C2

Then

±2500h (light) 10 (20) 0 01

±1250h (heavy) 02

No notification 3 02

Individual setting in a simultaneous operation system

We recommend using the optional user interface to set the slave unit.

Perform the following steps:

2 Change the second code number to 02 to perform individual

setting on the slave unit.

If you want to set the slave unit as… Then

M C1 C2

Unified setting 21(11) 01 01

Individual setting 02

3 Perform field setting for the master unit.

4 Turn off the main power supply switch.

5 Disconnect the remote controller from the master unit and

connect it to the slave unit.

6 Change to individual setting.

7 Perform field setting for the slave unit.

8 Turn off the main power supply or, in case of more slave units,

repeat the previous steps for all slave units.

9 Disconnect the user interface from the slave unit and reconnect

it to the master unit.

It is not necessary to rewire the remote controller from the master unit if the optional user interface is used. (However, remove the wires attached to the user interface terminal board of the master unit)

8 Commissioning

8.1 Overview: Commissioning

This chapter describes what you have to do and know to commission the system after it is installed.

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

8 Commissioning

A B

Cool

Set to

28°C

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 Precautions when commissioning

INFORMATION

During the first running period of the unit, the required power may be higher than stated on the nameplate of the unit. This phenomenon is caused by the compressor, that needs a continuous run time of 50hours before reaching smooth operation and stable power consumption.

NOTICE

Before starting up the system, the unit MUST be energised for at least 6hours to avoid compressor breakdown during startup.

NOTICE

NEVER operate the unit without thermistors and/or pressure sensors/switches. Burning of the compressor might result.

NOTICE

Do NOT operate the unit until the refrigerant piping is complete (when operated this way, the compressor will break).

NOTICE

Cooling operation mode. Perform the test run in cooling

operation mode so that stop valves failing to open can be detected. Even if the user interface was set to heating operation mode, the unit will run in cooling operation mode during 2‑3 minutes (although the user interface will display the heating icon), and then automatically switch to heating operation mode.

NOTICE

If you cannot operate the unit in test run, see "8.5 Error

codes when performing a test run"on page20.

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.

8.4 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.

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.

1 Perform 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.

WARNING

If the panels on the indoor units are not installed yet, make sure to power OFF the system after finishing the test run. To do so, turn OFF operation via the user interface. Do NOT stop operation by turning OFF the circuit breakers.

8.3 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.

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

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.

2 Start the test run

# Action Result

1 Go to the home menu.

2 Press at least 4seconds. The Service Settings menu

is displayed.

Installer and user reference guide

9 Hand-over to the user

Return Setting

Service Settings 1/3

Test Operation

Maintenance Contact Field Settings Demand Min Setpoints Differential Group Address

Cool

Return Setting

Test Operation

Return Setting

Air Volume/direction

Air Volume Direction

Position 0

Low

Return Setting

Air Volume/direction

Air Volume Direction

Low

Position 0

Return Setting

Service Settings 1/3

Test Operation

Maintenance Contact Field Settings Demand Min Setpoints Differential Group Address

# Action Result

3 Select Test Operation.

4 Press. Test Operation is

displayed on the home menu.

5 Press within 10seconds. Test run starts.

3 Check operation for 3minutes.

4 Check operation of the airflow direction.

# Action Result

1 Press.

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.

2 Select Position 0.

3 Change the position. If the airflow flap of the

indoor unit moves, operation is OK.

If not, operation is not OK.

4 Press. The home menu is

displayed.

5 Stop the test run.

# Action Result

1 Press at least 4seconds. The Service Settings menu

is displayed.

2 Select Test Operation.

3 Press. The unit returns to normal

operation, and the home menu is displayed.

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

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).

8.5 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:

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

11 Technical data

INDOOR

OUTDOOR

11.1 Piping diagram: Indoor unit

11.2 Wiring diagram

11.2.1 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

Earth Relay connector

Field wiring Short-circuit connector

Fuse Terminal

Indoor unit Terminal strip

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_*

D*, V*D Diode

DB* Diode bridge

DS* Dip switch

E*H Heater

FU*, F*U, (for characteristics, refer to PCB inside your unit)

FG* Connector (frame ground)

H* Harness

H*P, LED*, V*L Pilot lamp, light emitting diode

Connection, connector

Fuse

Rectifier

a Liquid pipe connection b Gas pipe connection c Heat exchanger

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

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

Installer and user reference guide

12 About the system

SHEET METAL Terminal strip fixed plate

T*R Transformer

TC, TRC Transmitter

V*, R*V Varistor

V*R Diode bridge

WRC Wireless remote controller

For the user

12 About the system

The indoor unit of this split system air conditioner can be used for heating/cooling applications.

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.

12.1 System layout

X* Terminal

X*M Terminal strip (block)

Y*E Electronic expansion valve coil

Y*R, Y*S Reversing solenoid valve coil

Z*C Ferrite core

ZF, Z*F Noise filter

Item Symbol Value Unit

Cooling capacity (latent) P

Heating capacity P

Total electric power input P

Sound power level (per speed setting, if applicable)

Contact details:

DAIKIN INDUSTRIES CZECH REPUBLIC s.r.o. U Nové Hospody 1/1155, 301 00 Plzeň Skvrňany, Czech Republic

A B C D E

FXFQ20 1.8 0.4 2.5 0.038 49

FXFQ25 2.1 0.7 3.2 0.038 49

FXFQ32 2.8 0.8 4 0.038 49

FXFQ40 3.4 1.1 5 0.038 51

FXFQ50 4.1 1.5 6.3 0.053 51

FXFQ63 5.2 1.9 8 0.061 53

FXFQ80 6.5 2.5 10 0.092 55

FXFQ100 7.8 3.4 12.5 0.115 60

FXFQ125 9.8 4.2 16 0.186 61

rated,c

rated,h

elec

B kW

C kW

D kW

E dB

a Indoor unit b Outdoor unit c User interface d Suction air e Discharge air

g Drain pipe h Earth wiring

12.2 Information requirements for fan

f Refrigerant piping + interconnection cable

i Suction grille and air filter

coil units

Item Symbol Value Unit

Cooling capacity (sensible) P

rated,c

A kW

13 User interface

CAUTION

▪ NEVER touch the internal parts of the controller.

▪ Do NOT remove the front panel. Some parts inside are

dangerous to touch and appliance problems may happen. For checking and adjusting the internal parts, contact your dealer.

This operation manual will give a non-exhaustive overview of the main functions of the system.

For more information about the user interface, see the operation manual of the installed user interface.

14 Before operation

WARNING

This unit contains electrical and hot parts.

WARNING

Before operating the unit, be sure the installation has been carried out correctly by an installer.

CAUTION

It is not good for your health to expose your body to the air flow for a long time.

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

15 Operation

CAUTION

To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner is used together with the system.

CAUTION

Do NOT operate the system when using a room fumigation-type insecticide. Chemicals could collect in the unit, and endanger the health of people who are hypersensitive to chemicals.

NOTICE

Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor.

This operation manual is for the following systems with standard control. Before initiating operation, contact your dealer for the operation that corresponds to your system type and mark. If your installation has a customised control system, ask your dealer for the operation that corresponds to your system.

Operation modes:

▪ Heating and cooling (air to air).

▪ Fan only operation (air to air).

15 Operation

15.1 Operating the system

Hot start

In order to prevent cold air from blowing out of an indoor unit at the start of heating operation, the indoor fan is automatically stopped.

The display of the user interface shows . It may take some time before the fan starts. This is not a malfunction.

INFORMATION

▪ The heating capacity drops when the outside

temperature falls. If this happens, use another heating device together with the unit. (When using together with appliances that produce open fire, ventilate the room constantly). Do not place appliances that produce open fire in places exposed to the air flow from the unit or under the unit.

▪ It takes some time to heat up the room from the time

the unit is started since the unit uses a hot-air circulating system to heat the entire room.

▪ If the hot air rises to the ceiling, leaving the area above

the floor cold, we recommend that you use the circulator (the indoor fan for circulating air). Contact your dealer for details.

15.1.4 To operate the system

1 Press the operation mode selector button on the user interface

several times and select the operation mode of your choice.

Cooling operation

Heating operation

Fan only operation

15.1.1 About operating the system

▪ To protect the unit, turn on the main power switch 6 hours before

operation.

▪ If the main power supply is turned off during operation, operation

will restart automatically after the power turns back on again.

15.1.2 About cooling, heating, fan only, and automatic operation

▪ The air flow rate may adjust itself depending on the room

temperature or the fan may stop immediately. This is not a malfunction.

15.1.3 About the heating operation

It may take longer to reach the set temperature for general heating operation than for cooling operation.

The following operation is performed in order to prevent the heating capacity from dropping or cold air from blowing.

Defrost operation

In heating operation, freezing of the outdoor unit's air cooled coil increases over time, restricting the energy transfer to the outdoor unit's coil. Heating capability decreases and the system needs to go into defrost operation to be able to remove frost from the outdoor unit’s coil. During defrost operation the heating capacity on the indoor unit side will temporarily drop until defrosting is completed. After defrosting, the unit will regain its full heating capacity.

The indoor unit will stop fan operation, the refrigerant cycle will reverse and energy from inside the building will be used to defrost the outdoor unit coil.

The indoor unit will indicate defrost operation on the display .

2 Press the ON/OFF button on the user interface.

Result: The operation lamp lights up and the system starts

operating.

15.2 Using the dry program

15.2.1 About the dry program

▪ The function of this program is to decrease the humidity in your

room with minimal temperature decrease (minimal room cooling).

▪ The micro computer automatically determines temperature and

fan speed (cannot be set by the user interface).

▪ The system does not go into operation if the room temperature is

low (<20°C).

15.2.2 To use the dry program

To start

1 Press the operation mode selector button on the user interface

several times and select (program dry operation).

2 Press the ON/OFF button of the user interface.

Result: The operation lamp lights up and the system starts

operating.

To stop

3 Press the ON/OFF button on the user interface once again.

Result: The operation lamp goes out and the system stops

operating.

NOTICE

Do not turn off power immediately after the unit stops, but wait for at least 5 minutes.

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

Installer and user reference guide

16 Energy saving and optimum operation

Cool

Set to

28°C

Return Setting

Main Menu 1/2

Circulation Airflow

Individual Air Direction Energy Saving Options Schedule Maintenance Information Configuration

Return Setting

Main Menu 1/2

Circulation Airflow

Individual Air Direction Energy Saving Options Schedule Maintenance Information Configuration

Return Setting

Circulation Airow

Enable/Disable

Enable

Return Setting

Circulation Airow

Save the settings?

Yes No

Cool

Set to

28°C

Return Setting

Air Volume/direction

Air Volume Direction

Auto

15.3 Adjusting the air flow direction

Refer to the operation manual of the user interface.

15.3.1 About the air flow flap

Double flow+multi-flow units

For the following conditions, a micro computer controls the air flow direction which may be different from the display.

Cooling Heating

▪ When the room temperature is

lower than the set temperature.

▪ When operating continuously at horizontal air flow direction.

▪ When continuous operation with downward air flow is performed

at the time of cooling with a ceiling-suspended or a wall-mounted unit, the micro computer may control the flow direction, and then the user interface indication will also change.

The air flow direction can be adjusted in one of the following ways:

▪ The air flow flap itself adjusts its position.

▪ The air flow direction can be fixed by the user.

▪ Automatic and desired position .

WARNING

Never touch the air outlet or the horizontal blades while the swing flap is in operation. Fingers may become caught or the unit may break down.

NOTICE

▪ The movable limit of the flap is changeable. Contact

your dealer for details. (only for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted).

▪ Avoid operating in the horizontal direction . It may

cause dew or dust to settle on the ceiling or flap.

▪ When starting operation.

▪ When the room temperature is

higher than the set temperature.

▪ At defrost operation.

15.4 Active circulation airflow

Use active circulation airflow to heat or cool the room more quickly.

15.4.1 To start the active circulation airflow

1 Set the active circulation airflow

1 Go to the home screen.

2 Press.

3 Select Circulation airflow

4 Choose enable and confirm.

5 Confirm setting.

6 Go to the home screen.

7 Check if Air Volume/direction

is set to automatic. If not set to automatic.

2 Turn on the unit by the user interface.

16 Energy saving and optimum

operation

Observe the following precautions to ensure the system operates properly.

▪ Adjust the air outlet properly and avoid direct air flow to room

inhabitants.

▪ Adjust the room temperature properly for a comfortable

environment. Avoid excessive heating or cooling.

▪ Prevent direct sunlight from entering a room during cooling

operation by using curtains or blinds.

▪ Ventilate often. Extended use requires special attention to

ventilation.

▪ Keep doors and windows closed. If the doors and windows remain

open, air will flow out of your room causing a decrease in the cooling or heating effect.

▪ Be careful NOT to cool or heat too much. To save energy, keep

the temperature setting at a moderate level.

▪ NEVER place objects near the air inlet or the air outlet of the unit.

Doing so may cause a reduced heating/cooling effect or stop operation.

▪ Turn off the main power supply switch to the unit when the unit is

NOT used for longer periods of time. If the main power supply switch is on, the unit consumes electricity. Before restarting the unit, turn on the main power supply switch 6 hours before operation to ensure smooth running.

▪ When the display shows (time to clean the air filter), clean the

filters (see "17.2.1To clean the air filter"on page25).

▪ Keep the indoor unit and user interface at least 1 m away from

televisions, radios, stereos, and other similar equipment. Failing to do so may cause static or distorted pictures.

▪ Do NOT place items under the indoor unit, as they may be

damaged by water.

▪ Condensation may form if the humidity is above 80% or if the

drain outlet gets blocked.

Installer and user reference guide

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

17 Maintenance and service

17.1 Precautions for maintenance and service

CAUTION: Pay attention to the fan!

It is dangerous to inspect the unit while the fan is running.

Be 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.

NOTICE

Never inspect or service the unit by yourself. Ask a qualified service person to perform this work. However, as end user, you may clean the air filter, suction grille, air outlet and outside panels.

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.

▪ If the dirt becomes impossible to clean, change the air filter

(=optional equipment).

How to clean the air filter:

NOTICE

Do NOT use water of 50°C or higher. Possible consequence: Discoloration and deformation.

1 Open the suction grille.

Standard panel:

Design panel:

CAUTION

After a long use, check the unit stand and fitting for damage. If damaged, the unit may fall and result in injury.

NOTICE

Do NOT wipe the controller operation panel with benzine, thinner, chemical dust cloth, etc. The panel may get discoloured or the coating peeled off. If it is heavily dirty, soak a cloth in water-diluted neutral detergent, squeeze it well and wipe the panel clean. Wipe it with another dry cloth.

CAUTION

Before accessing terminal devices, make sure to interrupt all power supply.

NOTICE

When cleaning the heat exchanger, make sure to remove the switch box, fan motor, drain pump and float switch. Water or detergent might deteriorate the insulation of electronic components and result in burnout of these components.

17.2 Cleaning the air filter, suction grille, air outlet and outside panels

CAUTION

Turn off the unit before cleaning the air filter, suction grille, air outlet and outside panels.

17.2.1 To clean the air filter

When to clean the air filter:

▪ Rule of thumb: Clean every 6 months. If the air in the room is

extremely contaminated, increase the cleaning frequency.

▪ Depending on the settings, the user interface can display the

TIME TO CLEAN AIR FILTER notification. Clean the air filter when the notification is displayed.

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

2 Remove the air filter.

Standard panel:

Design panel:

3 Clean the air filter. Use a vacuum cleaner or wash with water. If

the air filter is very dirty, use a soft brush and neutral detergent.

4 Dry the air filter in the shadow.

5 Reattach the air filter and close the suction grille.

6 Turn ON the power.

7 Press the FILTER SIGN RESET button.

Result: The TIME TO CLEAN AIR FILTER notification

disappears from the user interface.

Installer and user reference guide

17 Maintenance and service

45°

17.2.2 To clean the suction grille

NOTICE

Do NOT use water of 50°C or higher. Possible consequence: Discoloration and deformation.

1 Open the suction grille.

Standard panel:

Design panel:

2 Remove the suction grille.

Standard panel:

Design panel:

NOTICE

▪ Do NOT use gasoline, benzene, thinner polishing

powder or liquid insecticide. Possible consequence: Discoloration and deformation.

▪ Do NOT use water or air of 50°C or higher. Possible

consequence: Discoloration and deformation.

▪ Do NOT scrub firmly when washing the blade with

water. Possible consequence: The surface sealing peels off.

Clean with a soft cloth. If it is difficult to remove stains, use water or neutral detergent.

17.3 Maintenance after a long stop period

E.g., at the beginning of the season.

▪ Check and remove everything that might be blocking inlet and

outlet vents of indoor units and outdoor units.

▪ Clean air filters and casings of indoor units (see "17.2.1To clean

the air filter"on page25 and "17.2.3 To clean the air outlet and outside panels"on page26).

▪ Turn on the power at least 6 hours before operating the unit in

order to ensure smoother operation. As soon as the power is turned on, the user interface display appears.

17.4 Maintenance before a long stop period

E.g., at the end of the season.

▪ Let the indoor units run in fan only operation for about half a day in

order to dry the interior of the units. Refer to "15.1.2 About

cooling, heating, fan only, and automatic operation" on page 23

for details on fan only operation.

▪ Turn off the power. The user interface display disappears.

▪ Clean air filters and casings of indoor units (see "17.2.1To clean

the air filter"on page25 and "17.2.3 To clean the air outlet and outside panels"on page26).

3 Remove the air filter.

4 Clean the suction grille. Wash with a soft bristle brush, and

water or neutral detergent. If the suction grille is very dirty, use a typical kitchen cleaner, leave it on for 10min, then wash it with water.

5 Reattach the air filter and suction grille, and close the suction

grille.

17.2.3 To clean the air outlet and outside panels

WARNING

Do NOT let the indoor unit get wet. Possible consequence: Electric shock or fire.

Installer and user reference guide

17.5 About the refrigerant

This product contains fluorinated greenhouse gases. Do NOT vent gases into the atmosphere.

Refrigerant type: R410A

Global warming potential (GWP) value: 2087.5

NOTICE

Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO2 equivalent.

Formula to calculate the quantity in CO2 equivalent tonnes: GWP value of the refrigerant × total refrigerant

charge [in kg] / 1000

Please contact your installer for more information.

WARNING

The refrigerant in the system is safe and normally does not leak. If the refrigerant leaks in the room, contact with a fire of a burner, a heater or a cooker may result in 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 system until a service person confirms that the portion where the refrigerant leaks is repaired.

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

18 Troubleshooting

17.6 After-sales service and warranty

17.6.1 Warranty period

▪ This product includes a warranty card that was filled in by the

dealer at the time of installation. The completed card has to be checked by the customer and stored carefully.

▪ If repairs to the product are necessary within the warranty period,

contact your dealer and keep the warranty card at hand.

17.6.2 Recommended maintenance and inspection

Since dust collects when using the unit for several years, performance of the unit will deteriorate to some extent. As taking apart and cleaning interiors of units requires technical expertise and in order to ensure the best possible maintenance of your units, we recommend to enter into a maintenance and inspection contract on top of normal maintenance activities. Our network of dealers has access to a permanent stock of essential components in order to keep your unit in operation as long as possible. Contact your dealer for more information.

When asking your dealer for an intervention, always state:

▪ The complete model name of the unit.

▪ The manufacturing number (stated on the nameplate of the unit).

▪ The installation date.

▪ The symptoms or malfunction, and details of the defect.

WARNING

▪ Do not modify, disassemble, remove, reinstall or repair

the unit yourself as incorrect dismantling or installation may cause an electric 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 non-combustible, 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.

17.6.3 Recommended maintenance and inspection cycles

Be aware that the mentioned maintenance and replacement cycles do not relate to the warranty period of the components.

Component Inspection

cycle

Electric motor 1 year 20,000 hours

PCB 25,000 hours

Heat exchanger 5 years

Sensor (thermistor, etc.) 5 years

User interface and switches 25,000 hours

Drain pan 8 years

Expansion valve 20,000 hours

Solenoid valve 20,000 hours

The table assumes the following conditions of use:

▪ Normal use without frequent starting and stopping of the unit.

Depending on the model, we recommend not starting and stopping the machine more than 6 times/hour.

Maintenance cycle

(replacements and/or

repairs)

▪ Operation of the unit is assumed to be 10 hours/day and

2,500hours/year.

NOTICE

▪ The table indicates main components. Refer to your

maintenance and inspection contract for more details.

▪ The table indicates recommended intervals of

maintenance cycles. However, in order to keep the unit operational as long as possible, maintenance work may be required sooner. Recommended intervals can be used for appropriate maintenance design in terms of budgeting maintenance and inspection fees. Depending on the content of the maintenance and inspection contract, inspection and maintenance cycles may in reality be shorter than listed.

17.6.4 Shortened maintenance and replacement cycles

Shortening of "maintenance cycle" and "replacement cycle" needs to be considered in following situations:

The unit is used in locations where:

▪ Heat and humidity fluctuate out of the ordinary.

▪ Power fluctuation is high (voltage, frequency, wave distortion, etc.)

(the unit cannot be used if power fluctuation is outside the allowable range).

▪ Bumps and vibrations are frequent.

▪ Dust, salt, harmful gas or oil mist such as sulphurous acid and

hydrogen sulfide may be present in the air.

▪ The machine is started and stopped frequently or operation time is

long (sites with 24 hour air-conditioning).

Recommended replacement cycle of wear parts

Component Inspection

cycle

Air filter 1 year 5 years

High efficiency filter 1 year

Fuse 10 years

Pressure containing parts In case of corrosion,

NOTICE

▪ The table indicates main components. Refer to your

maintenance and inspection contract for more details.

▪ The table indicates recommended intervals of

replacement cycles. However, in order to keep the unit operational as long as possible, maintenance work may be required sooner. Recommended intervals can be used for appropriate maintenance design in terms of budgeting maintenance and inspection fees. Contact your dealer for details.

INFORMATION

Damage due to taking apart or cleaning interiors of units by anyone other than our authorised dealers may not be included in the warranty.

Maintenance cycle

(replacements and/or

repairs)

contact your local dealer.

18 Troubleshooting

If one of the following malfunctions occur, take the measures shown below and contact your dealer.

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

Installer and user reference guide

18 Troubleshooting

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, electric shock or fire. Contact your dealer.

The system MUST be repaired by a qualified service person.

Malfunction Measure

If a safety device such as a fuse, a breaker or an earth leakage breaker frequently actuates or the ON/OFF switch does NOT properly work.

If water leaks from the unit. Stop the operation.

The operation switch does NOT work well.

If the user interface display indicates the unit number, the operation lamp flashes and the malfunction code appears.

If the system does NOT properly operate except for the above mentioned cases and none of the above mentioned malfunctions is evident, investigate the system according to the following procedures.

Malfunction Measure

If the system does not operate at all.

The system operates but cooling or heating is insufficient.

If after checking all above items, it is impossible to fix the problem yourself, contact your installer and state the symptoms, the complete model name of the unit (with manufacturing number if possible) and the installation date (possibly listed on the warranty card).

▪ Check if there is no power failure. Wait

until power is restored. If power failure occurs during operation, the system automatically restarts immediately after power is restored.

▪ Check if no fuse has blown or breaker is

activated. Change the fuse or reset the breaker if necessary.

▪ Check if air inlet or outlet of outdoor or

indoor unit is not blocked by obstacles. Remove any obstacles and make sure the air can flow freely.

▪ Check if the air filter is not clogged (see

"17.2.1 To clean the air filter" on page25).

▪ Check the temperature setting.

▪ Check the fan speed setting on your user

interface.

▪ Check for open doors or windows. Close

doors and windows to prevent wind from coming in.

▪ Check if there are too many occupants in

the room during cooling operation. Check if the heat source of the room is excessive.

▪ Check if direct sunlight enters the room.

Use curtains or blinds.

▪ Check if the air flow angle is proper.

Turn OFF the main power switch.

Turn OFF the power supply.

Notify your installer and report the malfunction code.

18.1.1 Symptom: The system does not operate

▪ The air conditioner does not start immediately after the ON/OFF

button on the user interface is pressed. If the operation lamp lights, the system is in normal condition. To prevent overloading of the compressor motor, the air conditioner starts 5 minutes after it is turned ON again in case it was turned OFF just before. The same starting delay occurs after the operation mode selector button was used.

▪ If "Under Centralized Control" is displayed on the user interface,

pressing the operation button causes the display to blink for a few seconds. The blinking display indicates that the user interface cannot be used.

▪ The system does not start immediately after the power supply is

turned on. Wait one minute until the micro computer is prepared for operation.

18.1.2 Symptom: The fan speed does not correspond to the setting

The fan speed does not change even if the fan speed adjustment button in pressed. During heating operation, when the room temperature reaches the set temperature, the outdoor unit goes off and the indoor unit changes to whisper fan speed. This is to prevent cold air blowing directly on occupants of the room. The fan speed will not change if the button is pressed.

18.1.3 Symptom: The fan direction does not correspond to the setting

The fan direction does not correspond with the user interface display. The fan direction does not swing. This is because the unit is being controlled by the micro computer.

18.1.4 Symptom: White mist comes out of a unit (Indoor unit)

▪ When humidity is high during cooling operation. If the interior of an

indoor unit is extremely contaminated, the temperature distribution inside a room becomes uneven. It is necessary to clean the interior of the indoor unit. Ask your dealer for details on cleaning the unit. This operation requires a qualified service person.

▪ Immediately after the cooling operation stops and if the room

temperature and humidity are low. This is because warm refrigerant gas flows back into the indoor unit and generates steam.

18.1.5 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)

When the system is changed over to heating operation after defrost operation. Moisture generated by defrost becomes steam and is exhausted.

18.1.6 Symptom: The user interface display reads "U4" or "U5" and stops, but then restarts after a few minutes

This is because the user interface is intercepting noise from electric appliances other than the air conditioner. The noise prevents communication between the units, causing them to stop. Operation automatically restarts when the noise ceases.

18.1 Symptoms that are NOT system malfunctions

The following symptoms are NOT system malfunctions:

Installer and user reference guide

18.1.7 Symptom: Noise of air conditioners (Indoor unit)

▪ A "zeen" sound is heard immediately after the power supply is

turned on. The electronic expansion valve inside an indoor unit starts working and makes the noise. Its volume will reduce in about one minute.

FXFQ20~125BVEB

VRV system air conditioner

4P561452-1 – 2018.12

19 Relocation

▪ A continuous low "shah" sound is heard when the system is in

cooling operation or at a stop. When the drain pump is in operation, this noise is heard.

▪ A "pishi-pishi" squeaking sound is heard when the system stops

after heating operation. Expansion and contraction of plastic parts caused by temperature change make this noise.

18.1.8 Symptom: Noise of air conditioners (Indoor unit, outdoor unit)

▪ A continuous low hissing sound is heard when the system is in

cooling or defrost operation. This is the sound of refrigerant gas flowing through both indoor and outdoor units.

▪ A hissing sound which is heard at the start or immediately after

stopping operation or defrost operation. This is the noise of refrigerant caused by flow stop or flow change.

18.1.9 Symptom: Noise of air conditioners (Outdoor unit)

When the tone of operating noise changes. This noise is caused by the change of frequency.

18.1.10 Symptom: Dust comes out of the unit

When the unit is used for the first time in a long time. This is because dust has gotten into the unit.

18.1.11 Symptom: The units can give off odours

The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it again.

18.1.12 Symptom: The outdoor unit fan does not spin

During operation. The speed of the fan is controlled in order to optimise product operation.

18.1.13 Symptom: The display shows "88"

This is the case immediately after the main power supply switch is turned on and means that the user interface is in normal condition. This continues for 1minute.

18.1.14 Symptom: The compressor in the outdoor unit does not stop after a short heating operation

This is to prevent refrigerant from remaining in the compressor. The unit will stop after 5 to 10 minutes.

21 Glossary

Dealer

Sales distributor for the product.

Authorized installer

Technical skilled person who is qualified to install the product.

User

Person who is owner of the product and/or operates the product.

Applicable legislation

All international, European, national and local directives, laws, regulations and/or codes that are relevant and applicable for a certain product or domain.

Service company

Qualified company which can perform or coordinate the required service to the product.

Installation manual

Instruction manual specified for a certain product or application, explaining how to install, configure and maintain it.

Operation manual

Instruction manual specified for a certain product or application, explaining how to operate it.

Maintenance instructions

Instruction manual specified for a certain product or application, which explains (if relevant) how to install, configure, operate and/or maintain the product or application.

Accessories

Labels, manuals, information sheets and equipment that are delivered with the product and that need to be installed according to the instructions in the accompanying documentation.

Optional equipment

Equipment made or approved by Daikin that can be combined with the product according to the instructions in the accompanying documentation.

Field supply

Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation.

19 Relocation

Contact your dealer for removing and reinstalling the total unit. Moving units requires technical expertise.

20 Disposal

NOTICE

FXFQ20~125BVEB VRV system air conditioner 4P561452-1 – 2018.12

Installer and user reference guide

4P561452-1 2018.12

Daikin FXFQ20BVEB, FXFQ25BVEB, FXFQ32BVEB, FXFQ40BVEB, FXFQ50BVEB Installer reference guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of contents

1 General safety precautions

1.1 About the documentation

1.1.1 Meaning of warnings and symbols

1.2 For the user

1.3 For the installer

1.3.1 General

1.3.2 Installation site

Instructions for equipment using R32 refrigerant

Installation space requirements

To determine the minimum floor area

1.3.3 Refrigerant

1.3.4 Brine

1.3.5 Water

1.3.6 Electrical

2 About the documentation

2.1 About this document

3 About the box

For the installer

3.1 Overview: About the box

3.2 Indoor unit

3.2.1 To unpack and handle the unit

3.2.2 To remove the accessories from the indoor unit

4 About the units and options

4.1 Overview: About the units and options

4.2 Identification

5 Preparation

4.2.1 Identification label: Indoor unit

4.3 System layout

4.4 Combining units and options

4.4.1 Possible options for the indoor unit

5.2 Preparing the installation site

5.2.1 Installation site requirements of the indoor unit

5.1 Overview: Preparation

5.3 Preparing refrigerant piping

5.3.1 Refrigerant piping requirements

Refrigerant piping diameter

Refrigerant piping material

6 Installation

5.3.2 Refrigerant piping insulation

5.4 Preparing electrical wiring

5.4.1 About preparing electrical wiring

6.2 Mounting the indoor unit

6.2.1 Precautions when mounting the indoor unit

6.2.2 Guidelines when installing the indoor unit

6.1 Overview: Installation

6.2.3 Guidelines when installing the drain piping

General guidelines

To check for water leaks

When electrical wiring is not finished yet

To connect the drain piping to the indoor unit

When electrical wiring is finished already

6.3 Connecting the refrigerant piping

6.3.1 About connecting the refrigerant piping

6.3.2 Precautions when connecting the refrigerant piping

6.3.3 Guidelines when connecting the refrigerant piping

6.3.4 Pipe bending guidelines

6.3.5 To flare the pipe end

6.3.6 To connect the refrigerant piping to the indoor unit

6.4 Connecting the electrical wiring

6.4.1 About connecting the electrical wiring

6.4.2 Precautions when connecting the electrical wiring

6.4.3 Guidelines when connecting the electrical wiring

6.4.4 Specifications of standard wiring components

6.4.5 To connect the electrical wiring on the indoor unit

7 Configuration

7.1 Field settings

8 Commissioning

8.1 Overview: Commissioning

8.2 Precautions when commissioning

8.4 To perform a test run

8.3 Checklist before commissioning

9 Hand-over to the user

10 Disposal

11 Technical data

8.5 Error codes when performing a test run