Daikin 3MXM40N2V1B, 3MXM52N2V1B, 3AMXM52M3V1B, 3MXM68N2V1B, 3AMXF52A2V1B Installer reference guide

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Installer reference guide
R32 Split series
3MXM40N2V1B 3MXM52N2V1B 3AMXM52M3V1B 3MXM68N2V1B 3AMXF52A2V1B 3MXF52A2V1B 3MXF68A2V1B 4MXM68N2V1B 4MXM80N2V1B 5MXM90N2V1B
Installer reference guide
R32 Split series
English

Table of contents

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 installer.......................................................................... 3
1.2.1 General ....................................................................... 3
1.2.2 Installation site ............................................................ 3
1.2.3 Refrigerant .................................................................. 5
1.2.4 Brine............................................................................ 6
1.2.5 Water .......................................................................... 6
1.2.6 Electrical ..................................................................... 6
2 About the documentation 7
2.1 About this document.................................................................. 7
2.2 Installer reference guide at a glance ......................................... 7
3 About the box 7
3.1 Overview: About the box ........................................................... 7
3.2 Outdoor unit............................................................................... 7
3.2.1 To unpack the outdoor unit ......................................... 7
3.2.2 To remove the accessories from the outdoor 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: Outdoor unit ................................. 8
5 Preparation 8
5.1 Overview: Preparation............................................................... 8
5.2 Preparing the installation site .................................................... 8
5.2.1 Installation site requirements of the outdoor unit ........ 9
5.2.2 Additional installation site requirements of the
outdoor unit in cold climates ....................................... 10
5.2.3 Refrigerant piping length and height difference .......... 10
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 Opening the unit ........................................................................ 12
6.2.1 About opening the unit................................................ 12
6.2.2 To open the outdoor unit............................................. 12
6.3 Mounting the outdoor unit.......................................................... 12
6.3.1 About mounting the outdoor unit................................. 12
6.3.2 Precautions when mounting the outdoor unit.............. 12
6.3.3 To provide the installation structure............................ 12
6.3.4 To install the outdoor unit............................................ 13
6.3.5 To provide drainage.................................................... 13
6.3.6 To prevent the outdoor unit from falling over .............. 13
6.4 Connecting the refrigerant piping .............................................. 13
6.4.1 About connecting the refrigerant piping ...................... 13
6.4.2 Precautions when connecting the refrigerant piping... 14
6.4.3 Guidelines when connecting the refrigerant piping..... 14
6.4.4 Pipe bending guidelines.............................................. 14
6.4.5 To flare the pipe end................................................... 15
6.4.6 Connections between outdoor and indoor unit using
reducers ...................................................................... 15
6.4.7 Using the stop valve and service port......................... 16
6.4.8 To connect the refrigerant piping to the outdoor unit .. 17
6.5 Checking the refrigerant piping ................................................. 17
6.5.1 About checking the refrigerant piping ......................... 17
6.5.2 Precautions when checking the refrigerant piping ...... 17
6.5.3 To check for leaks....................................................... 17
6.5.4 To perform vacuum drying .......................................... 17
6.6 Charging refrigerant ................................................................... 18
6.6.1 About charging refrigerant ........................................... 18
6.6.2 Precautions when charging refrigerant ........................ 18
6.6.3 About the refrigerant .................................................... 18
6.6.4 To determine the additional refrigerant amount........... 19
6.6.5 To determine the complete recharge amount.............. 19
6.6.6 To charge additional refrigerant ................................... 19
6.6.7 To fix the fluorinated greenhouse gases label ............. 19
6.7 Connecting the electrical wiring.................................................. 19
6.7.1 About connecting the electrical wiring.......................... 19
6.7.2 Precautions when connecting the electrical wiring ...... 19
6.7.3 Guidelines when connecting the electrical wiring ........ 20
6.7.4 Specifications of standard wiring components............. 20
6.7.5 To connect the electrical wiring on the outdoor unit..... 21
6.8 Finishing the outdoor unit installation ......................................... 21
6.8.1 To finish the outdoor unit installation ........................... 21
6.8.2 About standby electricity saving function..................... 22
6.8.3 About priority room function ......................................... 22
6.8.4 About night quiet mode ................................................ 22
6.8.5 About heat mode lock .................................................. 22
6.8.6 About cool mode lock................................................... 23
6.8.7 To close the outdoor unit ............................................. 23
7 Commissioning 23
7.1 Overview: Commissioning.......................................................... 23
7.2 Precautions when commissioning .............................................. 23
7.3 Checklist before commissioning................................................. 23
7.4 Checklist during commissioning ................................................. 23
7.5 Trial operation and testing.......................................................... 24
7.5.1 About wiring error check .............................................. 24
7.5.2 To perform a test run ................................................... 24
7.6 Starting up the outdoor unit ........................................................ 24
7.7 Fault diagnosis using LED on outdoor unit PCB ........................ 25
8 Hand-over to the user 25
9 Maintenance and service 25
9.1 Overview: Maintenance and service .......................................... 25
9.2 Maintenance safety precautions................................................. 25
9.3 Checklist for yearly maintenance of the outdoor unit ................. 25
9.4 About the compressor ................................................................ 25
10 Troubleshooting 26
10.1 Overview: Troubleshooting......................................................... 26
10.2 Precautions when troubleshooting ............................................. 26
10.3 Solving problems based on symptoms....................................... 26
10.3.1 Symptom: Indoor units fall, vibrate or make noise ....... 26
10.3.2 Symptom: The unit is NOT heating or cooling as
expected ...................................................................... 26
10.3.3 Symptom: Water leakage............................................. 26
10.3.4 Symptom: Electrical leakage........................................ 26
10.3.5 Symptom: Priority room setting does NOT function ..... 26
10.3.6 Symptom: Unit does NOT function or burn damage .... 26
11 Disposal 27
11.1 Overview: Disposal..................................................................... 27
11.2 To pump down............................................................................ 27
11.3 To start and stop forced cooling ................................................. 27
12 Technical data 28
12.1 Wiring diagram ........................................................................... 28
12.1.1 Unified wiring diagram legend...................................... 28
12.2 Piping diagram: Outdoor unit...................................................... 29
13 Glossary 31
Installer reference guide
2
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10

1 General safety precautions

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 in the installer reference guide MUST be performed by an authorised installer.

1.1.1 Meaning of warnings and symbols

DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING
Indicates a situation that could result in burning because of extreme hot or cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate injury.
NOTICE
Indicates a situation that could result in equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
Symbol Explanation
Before installation, read the installation and operation manual, and the wiring instruction sheet.
Before performing maintenance and service tasks, read the service manual.
For more information, see the installer and user reference guide.

1.2 For the installer

1.2.1 General

If you are NOT sure how to install or operate the unit, contact your dealer.
NOTICE
Improper installation or attachment of equipment or accessories could result in electric shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by Daikin.
WARNING
Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation).
CAUTION
Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system.
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation.
DANGER: RISK OF BURNING
▪ Do NOT touch the refrigerant piping, water piping or
internal parts during and immediately after operation. It could be too hot or too cold. Give it time to return to normal temperature. If you must touch it, wear protective gloves.
▪ Do NOT touch any accidental leaking refrigerant.
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.

1.2.2 Installation site

▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the weight and vibration
of the unit.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
Installer reference guide
3
1 General safety precautions
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO2eq
1000
GWP × kg
=
=
+
kg
=
kg
=
GWP: xxx
R32
0
10
20
30
40
50
60
70
80
90
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
A
min
(m2)
Floor-standing unit
(c)
Wall-mounted unit
(b)
Ceiling-mounted unit
(a)
m (kg)
▪ 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.
To determine the minimum floor area
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.
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 reference guide
4
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
1 General safety precautions
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)
A
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)
A
min
(m2)
Floor-standing
unit
(c)
m (kg)
A
min
(m2)
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.
m Total refrigerant charge in the system
A
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)

1.2.3 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.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
WARNING
Make sure there is no oxygen in the system. Refrigerant may only be charged after performing the leak test and the vacuum drying.
▪ In case recharge is required, see the nameplate of the unit. It
states the type of refrigerant and necessary amount.
▪ The unit is factory charged with refrigerant and depending on pipe
sizes and pipe lengths some systems require additional charging of refrigerant.
▪ 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
Charge with the cylinder upright.
(i.e., the cylinder is marked with "Liquid filling siphon attached")
A siphon tube is NOT present Charge with the cylinder upside
down.
▪ Open refrigerant cylinders slowly.
▪ Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
Installer reference guide
5
1 General safety precautions
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.

1.2.4 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.

1.2.5 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.
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:

1.2.6 Electrical

DANGER: RISK OF ELECTROCUTION
▪ Turn OFF all power supply before removing the
switch box cover, connecting electrical wiring or touching electrical parts.
▪ Disconnect the power supply for more than 1minute,
and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50 V DC before you can touch electrical components. For the location of the terminals, see the wiring diagram.
▪ Do NOT touch electrical components with wet hands.
▪ Do NOT leave the unit unattended when the service
cover is removed.
WARNING
If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring.
▪ 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.
Install power cables at least 1 metre away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1metre may not be sufficient.
Installer reference guide
6
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10

2 About the documentation

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
INFORMATION
This appliance is intended to be used by expert or trained users in shops, in light industry, and on farms, or for commercial and household use by lay persons.

2.2 Installer reference guide at a glance

Chapter Description
General safety precautions
About the documentation What documentation exists for the
About the box How to unpack the units and remove
About the unit How to identify the unit
Preparation What to do and know before going
Installation What to do and know to install the
Commissioning What to do and know to commission the
Hand‑over to the user What to give and explain to the user
Maintenance and service How to maintain and service the units
Troubleshooting What to do in case of problems
Disposal How to dispose of the system
Technical data Specifications of the system
Glossary Definition of terms
Safety instructions that you MUST read before installing
installer
their accessories
on‑site
system
system after it is configured

3 About the box

WARNING
Make sure installation, servicing, maintenance, repair and applied materials follow the instructions from Daikin and, in addition, comply with applicable legislation and are performed by qualified persons only. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is the applicable standard.
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 outdoor unit)
Outdoor unit installation manual:
▪ Installation instructions
▪ Format: Paper (in the box of the outdoor unit)
Installer reference guide:
▪ Preparation of the installation, reference data,…
▪ 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
Business Portal (authentication required).

3.1 Overview: About the box

This chapter describes what you have to do after the boxes with the outdoor and indoor unit are delivered on-site.
Keep the following in mind:
▪ At delivery, the unit MUST be checked for damage. Any damage
MUST be reported immediately to the claims agent of the carrier.
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
▪ Prepare the path along which you want to bring the unit inside in
advance.

3.2 Outdoor unit

3.2.1 To unpack the outdoor unit

3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
Installer reference guide
7

4 About the units and options

1
2
a
b c d e
i j
g h
f
c Fluorinated greenhouse gases label d Multilingual fluorinated greenhouse gases label e Drain socket
f Screw bag. The screws will be used for fixing the electrical
wire anchor bands.
g Drain cap (small) h Drain cap (large)
i Reducer assembly j Energy label
4 About the units and options

4.1 Overview: About the units and options

This chapter contains information about:
▪ Identification of the outdoor unit

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.

3.2.2 To remove the accessories from the outdoor unit

1 Lift the outdoor unit.
CAUTION
Only handle the outdoor unit as follows:
2 Remove the accessories at the bottom of the package.

4.2.1 Identification label: Outdoor unit

Location

5 Preparation

5.1 Overview: Preparation

This chapter describes what you have to do and know before going on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
▪ Preparing the electrical wiring
Installer reference guide
8
a Outdoor unit installation manual
b General safety precautions

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.
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
5 Preparation
≤1200
>100
>100
>50
>350
>350
(mm)(mm)
a
b
b
a
>250
>300
(mm)
b
a
b
c
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
WARNING
Do NOT install the air conditioner at any place where flammable gas may leak out. If the gas leaks out and stays around the air conditioner, a fire may break out.
▪ Install units, power cables and communication wiring at least 3m
away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 3m may not be sufficient.
▪ Objects placed under the unit may be damaged by water from the
drain.
WARNING
If appliances contain R32 refrigerant, then the floor area of the room in which the appliances are installed, operated and stored must be larger than the minimum floor area. This applies to:
▪ Indoor units without refrigerant leakage sensor; in
case of indoor units with refrigerant leakage sensor, consult the installation manual
▪ Outdoor units installed or stored indoors (example:
winter garden, garage, machinery room)
▪ Field piping in unventilated spaces
WARNING
The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).
NOTICE
▪ Do NOT stack the units on each other.
▪ Do NOT hang the unit on a ceiling.
Strong winds (≥18 km/h) blowing against the outdoor unit’s air outlet causes short circuit (suction of discharge air). This may result in:
▪ deterioration of the operational capacity;
▪ frequent frost acceleration in heating operation;
▪ disruption of operation due to decrease of low pressure or
increase of high pressure;
▪ a broken fan (if a strong wind blows continuously on the fan, it
may start rotating very fast, until it breaks).
It is recommended to install a baffle plate when the air outlet is exposed to wind.
It is recommended to install the outdoor unit with the air inlet facing the wall and NOT directly exposed to the wind.

5.2.1 Installation site requirements of the outdoor unit

INFORMATION
Also read the following requirements:
▪ General installation site requirements. See the
"General safety precautions" chapter.
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
Mind the following spacing guidelines:
a Air outlet b Air inlet
Allow 300mm of work space below the ceiling surface and 250mm for piping and electrical servicing.
a Baffle plate b Prevailing wind direction c Air outlet
Do NOT install the unit in the following places:
▪ Sound sensitive areas (e.g. near a bedroom), so that the
operation noise will cause no trouble. Note: If the sound is measured under actual installation conditions, the measured value might be higher than the sound pressure level mentioned in Sound spectrum in the data book due to environmental noise and sound reflections.
INFORMATION
The sound pressure level is less than 70dBA.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall off or cause water leakage.
It is NOT recommended to install the unit in the following places because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
Seaside installation. Make sure the outdoor unit is NOT directly exposed to sea winds. This is to prevent corrosion caused by high levels of salt in the air, which might shorten the life of the unit.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
Installer reference guide
9
5 Preparation
b
c
a
a
b
c
d
c
d
a
b
c
c
d
Install the outdoor unit away from direct sea winds.
Example: Behind the building.
If the outdoor unit is exposed to direct sea winds, install a windbreaker.
▪ Height of windbreaker≥1.5×height of outdoor unit
▪ Mind the service space requirements when installing the
windbreaker.
a Sea wind b Building c Outdoor unit d Windbreaker
The outdoor unit is designed for outdoor installation only, and for ambient temperatures within the following ranges:
Cooling mode Heating mode
–10~46°C DB –15~24°C DB

5.2.2 Additional installation site requirements of the outdoor unit in cold climates

Protect the outdoor unit against direct snowfall and take care that the outdoor unit is NEVER snowed up.
It is recommended to provide at least 150mm of free space below the unit (300mm for heavy snowfall areas). Additionally, make sure the unit is positioned at least 100mm above the maximum expected level of snow. If necessary, construct a pedestal. See "6.3Mounting
the outdoor unit"[412] for more details.
In heavy snowfall areas it is very important to select an installation site where the snow will NOT affect the unit. If lateral snowfall is possible, make sure that the heat exchanger coil is NOT affected by the snow. If necessary, install a snow cover or shed and a pedestal.

5.2.3 Refrigerant piping length and height difference

INFORMATION
For the Hybrid for Multi application and the DHW generator for Multi, see the indoor unit installation manual for the maximum allowable refrigerant piping length and height difference.
The shorter the refrigerant piping, the better the performance of the system.
The piping length and height differences must comply with the following requirements.
Model Minimum required space
3MXM40, 3MXM52, 3AMXM52, 3MXF52, 3AMXF52
3MXM68, 3MXF68 5.5m
4MXM68 6.5m
4MXM80 9.8m
5MXM90 10.4m
Shortest allowable length per room is 3m.
Outdoor unit Refrigerant piping
length to each indoor unit
3MXM40,
≤25m ≤50m 3MXM52, 3AMXM52, 3MXM68, 3MXF52, 3AMXF52, 3MXF68
4MXM68 ≤60m
4MXM80 ≤70m
5MXM90 ≤75m
2
4.7m
2
2
2
2
Refrigerant piping total length
Installer reference guide
10
a Snow cover or shed b Pedestal c Prevailing wind direction d Air outlet
Outdoor unit installed
Height difference outdoor-indoor
≤15m ≤7.5m
Height difference indoor-indoor
higher than indoor unit
Outdoor unit installed
≤7.5m ≤15m lower than at least 1 indoor unit

5.3 Preparing refrigerant piping

5.3.1 Refrigerant piping requirements

INFORMATION
Also read the precautions and requirements in the "General safety precautions" chapter.
Piping material: Phosphoric acid deoxidised seamless copper.
Piping diameter:
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10

6 Installation

t
Ø
ØiØ
i
t
ØpØ
p
3MXM40, 3MXM52, 3MXM68, 3AMXM52, 3MXF52, 3AMXF52, 3MXF68
Liquid piping 3× Ø6.4mm (1/4")
Gas piping 1× Ø9.5mm (3/8")
2× Ø12.7mm (1/2")
4MXM68
Liquid piping 4× Ø6.4mm (1/4")
Gas piping 2× Ø9.5mm (3/8")
2× Ø12.7mm (1/2")
4MXM80
Liquid piping 4× Ø6.4mm (1/4")
Gas piping 1× Ø9.5mm (3/8")
1× Ø12.7mm (1/2")
2× Ø15.9mm (5/8")
5MXM90
Liquid piping 5× Ø6.4mm (1/4")
Gas piping 2× Ø9.5mm (3/8")
1× Ø12.7mm (1/2")
2× Ø15.9mm (5/8")
Piping temper grade and thickness:
Outer diameter
(Ø)
6.4mm (1/4")
9.5mm (3/8")
12.7mm (1/2")
15.9mm (5/8") ≥1mm
Usage of reducers might be required based on the indoor unit. See
"6.4.6 Connections between outdoor and indoor unit using reducers"[415] for more information.
Temper grade Thickness (t)
Annealed (O) ≥0.8mm
(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.
(a)

5.3.2 Refrigerant piping insulation

▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052W/mK (0.035
and 0.045kcal/mh°C)
▪ with a heat resistance of at least 120°C
▪ Insulation thickness
Pipe outer diameter
(Øp)
6.4mm (1/4") 8~10mm ≥10mm
9.5mm (3/8") 10~14mm ≥13mm
12.7mm (1/2") 14~16mm ≥13mm
15.9mm (5/8") 16~20mm ≥13mm
If the temperature is higher than 30°C and the humidity is higher than RH 80%, the thickness of the insulation materials should be at least 20 mm to prevent condensation on the surface of the insulation.
Use separate thermal insulation pipes for the gas and liquid refrigerant piping.
Insulation inner
diameter (Øi)
Insulation thickness
(t)

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
The backup heater MUST have a dedicated power supply and MUST be protected by the safety devices required by the applicable legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
6 Installation
WARNING
Installation shall be done by an installer, the choice of materials and installation shall comply with the applicable legislation. In Europe, EN378 is the applicable standard.

6.1 Overview: Installation

This chapter describes what you have to do and know on-site to install the system.
Typical workflow
Installation typically consists of the following stages:
1 Mounting the outdoor unit.
2 Connecting the refrigerant piping.
3 Checking the refrigerant piping.
4 Charging refrigerant.
5 Connecting the electrical wiring.
6 Finishing the outdoor installation.
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11
6 Installation
2
1
20 mm
(mm)
353
600
240
240
a
INFORMATION
For installation of the indoor unit (mounting the indoor unit, connecting the refrigerant piping to the indoor unit, connecting the electrical wiring to the indoor unit …), see the installation manual of the indoor unit.
INFORMATION
Depending on the units and/or the installation conditions, it might be necessary to connect electrical wiring before you can charge refrigerant.
INFORMATION
It is NOT possible to connect an indoor unit of 1 room only. Be sure to connect indoor units of at least 2 rooms.
The Hybrid for Multi or the DHW generator for Multi are considered as 1 room connection.
For the correct combination, see the combination table and the installation manual of the Hybrid for Multi or the DHW generator for Multi.

6.2 Opening the unit

6.2.1 About opening the unit

At certain times, you have to open the unit. Example:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover is removed.
Typical workflow
Mounting the outdoor unit typically consists of the following stages:
1 Providing the installation structure.
2 Installing the outdoor unit.
3 Providing drainage.
4 Protecting the unit against snow and wind by installing a snow
cover and baffle plates. See "Preparing installation site" in
"5Preparation"[48].

6.3.2 Precautions when mounting the outdoor unit

INFORMATION
Also read the precautions and requirements in the following chapters:
▪ General safety precautions
▪ Preparation

6.3.3 To provide the installation structure

Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise.
Use a vibration-proof rubber (field supply) in cases where vibrations may be transmitted to the building.
The unit may be installed directly on a concrete veranda or another solid surface as long as it provides proper drainage.
Fix the unit securely by means of foundation bolts in accordance with the foundation drawing.
Prepare 4 sets of M8 or M10 anchor bolts, nuts and washers (field supply).

6.2.2 To open the outdoor unit

DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING

6.3 Mounting the outdoor unit

6.3.1 About mounting the outdoor unit

When
The outdoor and indoor unit must be mounted before the refrigerant piping can be connected.
a 100mm above expected level of snow
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12
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R32 Split series
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6.3.4 To install the outdoor unit

M8/M10
a
a cb b b
a a

6.3.5 To provide drainage

▪ Make sure that condensation water can be evacuated properly.
▪ Install the unit on a base to make sure that there is proper
drainage in order to avoid ice accumulation.
▪ Prepare a water drainage channel around the foundation to drain
waste water away from the unit.
▪ Avoid drain water flowing over the footpath, so that it does NOT
become slippery in case of ambient freezing temperatures.
▪ If you install the unit on a frame, install a waterproof plate within
150 mm of the bottom side of the unit in order to prevent water from getting into the unit and to avoid drain water dripping (see the following figure).
6 Installation
a Drain hole. Install a drain cap (large). b Drain hole. Install a drain cap (small). c Drain hole for drain socket

6.3.6 To prevent the outdoor unit from falling over

In case the unit is installed in places where strong wind can tilt the unit, take following measure:
1 Prepare 2 cables as indicated in the following illustration (field
supply).
2 Place the 2 cables over the outdoor unit.
3 Insert a rubber sheet between the cables and the outdoor unit
to prevent the cables from scratching the paint (field supply).
4 Attach the ends of the cables and tighten them.
NOTICE
In cold areas, do NOT use a drain socket, hose and caps (large, small) with the outdoor unit. Take adequate measures so that the evacuated condensate CANNOT freeze.
NOTICE
If the drain holes of the outdoor unit are blocked up by a mounting base or floor surface, place additional foot bases ≤30mm under the outdoor unit's feet.
▪ Use a drain socket for drainage if necessary.
a Drain hole
To close the drain holes and attach the drain socket
1 Install drain caps (accessory f) and (accessory g). Make sure
the edges of the drain caps close off the holes completely.
2 Install the drain socket.

6.4 Connecting the refrigerant piping

CAUTION
▪ No brazing or welding on site for units with R32
refrigerant charge during shipment.
▪ During installation of the refrigeration system, joining of
parts with at least one part charged shall be performed taking into account the following requirements:
ð inside occupied spaces non permanent joints are not
allowed for R32 refrigerant except for site made joints directly connecting the indoor unit to piping. Site made joints directly connecting piping to indoor units shall be of non permanent type.
CAUTION
Do NOT connect the embedded branch piping and the outdoor unit when only carrying out piping work without connecting the indoor unit in order to add another indoor unit later.

6.4.1 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
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
Installer reference guide
13
6 Installation
a
b
c
d
R=
0.4~0.8
±2
45°
90°
±2
ØA
▪ Keeping in mind the guidelines for:
▪ Pipe bending
▪ Flaring pipe ends
▪ Using the stop valves

6.4.2 Precautions when connecting the refrigerant piping

INFORMATION
Also read the precautions and requirements in the following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF BURNING
CAUTION
▪ Do NOT use mineral oil on flared part.
▪ Do NOT reuse piping from previous installations.
▪ NEVER install a drier to this R32 unit to guarantee its
lifetime. The drying material may dissolve and damage the system.
CAUTION
▪ Use the flare nut fixed to the main unit.
▪ To prevent gas leakage, apply refrigeration oil only to
the inside of the flare. Use refrigeration oil for R32.
▪ Do NOT reuse joints.
NOTICE
Take the following precautions on refrigerant piping into account:
▪ Avoid anything but the designated refrigerant to get
mixed into the refrigerant cycle (e.g. air).
▪ Only use R32 when adding refrigerant.
▪ Only use installation tools (e.g. manifold gauge set) that
are exclusively used for R32 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).
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.
WARNING
Connect the refrigerant piping securely before running the compressor. If the refrigerant piping is NOT connected and the stop valve is open when the compressor is run, air will be sucked in. This will cause abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury.
NOTICE
Even if the stop valve is fully closed, the refrigerant may slowly leak out. Do NOT leave the flare nut removed for long period of time.

6.4.3 Guidelines when connecting the refrigerant piping

Take the following guidelines into account when connecting pipes:
▪ Coat the flare inner surface with ether oil or ester oil when
connecting a flare nut. Tighten 3 or 4 turns by hand, before tightening firmly.
▪ ALWAYS use 2 wrenches together when loosening a flare nut.
▪ ALWAYS use a spanner and torque wrench together to tighten the
flare nut when connecting the piping. This to prevent nut cracking and leaks.
a Torque wrench b Spanner c Piping union d Flare nut
Piping size
(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
Tightening
torque (N•m)
Flare
dimensions (A)
(mm)
Flare shape
(mm)

6.4.4 Pipe bending guidelines

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
Installer reference guide
14
Use a pipe bender for bending. All pipe bends should be as gentle as possible (bending radius should be 30~40mm or larger).
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
6 Installation
a b
A
a b
c
1 2 3 4 5 6
a b d ec

6.4.5 To flare the pipe end

CAUTION
▪ Incomplete flaring may cause refrigerant gas leakage.
▪ Do NOT re-use flares. Use new flares to prevent
refrigerant gas leakage.
▪ Use flare nuts that are included with the unit. Using
different flare nuts may cause refrigerant gas leakage.
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 R32
(clutch type)
A 0~0.5mm 1.0~1.5mm 1.5~2.0mm
5 Check that the flaring is properly made.
Conventional flare tool
Clutch type
(Ridgid-type)
Wing nut type
(Imperial-type)
Port Class Reducer
3MXM40
A 15, 20, 25, 35
B + C 15, 20, 25, 35 2+4
3MXM52, 3AMXM52
A 15, 20, 25, 35
B + C 15, 20, 25, 35 2+4
42, 50
3MXM68
A 15, 20, 25, 35
B + C 15, 20, 25, 35 2+4
42, 50, 60
3MXF52, 3AMXF52, 3MXF68
A 20, 25, 35
B + C 20, 25, 35 2+4
4MXM68
A + B 15, 20, 25, 35
C + D 15, 20, 25, 35 2+4
42, 50, 60
4MXM80
A 15, 20, 25, 35
B 15, 20, 25, 35 2+4
42, 50, 60
C + D 15, 20, 25, 35 5+6
42, 50, 60 1+3
71
5MXM90
A + B 15, 20, 25, 35
C 15, 20, 25, 35 2+4
42, 50, 60
D + E 15, 20, 25, 35 5+6
42, 50, 60 1+3
71

6.4.6 Connections between outdoor and indoor unit using reducers

INFORMATION
▪ For the DHW generator for Multi use the same reducer
as for the 20 class indoor unit.
▪ For the Hybrid for Multi, see the indoor unit installation
manual for the capacity class and applicable reducer.
Total indoor unit capacity class that can be connected to this outdoor unit:
Outdoor unit Total indoor unit capacity
3MXM40 ≤7.0kW
3MXM52, 3AMXM52, 3MXF52, 3AMXF52
3MXM68, 4MXM68, 3MXF68 ≤11.0kW
4MXM80 ≤14.5kW
5MXM90 ≤15.6kW
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
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.
class
≤9.0kW
Reducer type Connection
1 Ø15.9mm → Ø12.7mm
2 Ø12.7mm → Ø9.5mm
3 Ø15.9mm → Ø12.7mm
4 Ø12.7mm → Ø9.5mm
5 Ø15.9mm → Ø9.5mm
6 Ø15.9mm → Ø9.5mm
Connection examples:
▪ Connecting a Ø12.7mm pipe to a Ø15.9mm gas pipe connection
port
a Outdoor unit connection port b Reducer no. 1
Installer reference guide
15
6 Installation
a b d ec
a b d ec
c
d
a
b
a
b
c Reducer no. 3 d Flare nut for Ø15.9mm e Inter-unit piping
▪ Connecting a Ø9.5 mm pipe to a Ø15.9mm gas pipe connection
port
a Outdoor unit connection port b Reducer no. 6 c Reducer no. 5 d Flare nut for Ø9.5mm e Inter-unit piping
▪ Connecting a Ø9.5 mm pipe to a Ø12.7mm gas pipe connection
port
a Outdoor unit connection port b Reducer no. 2 c Reducer no. 4 d Flare nut for Ø12.7mm e Inter-unit piping
Coat the threaded connection port of the outdoor unit where the flare nut comes in with refrigeration oil.
Flare nut for (mm) Tightening torque (N•m)
Ø9.5 33~39
Ø12.7 50~60
Ø15.9 62~75
NOTICE
Use an appropriate wrench to avoid damaging the connection thread by overtightening the flare nut. Be careful NOT to overtighten the nut, or the smaller pipe may be damaged (about 2/3-1× the normal torque).

6.4.7 Using the stop valve and service port

To handle the stop valve
Take the following guidelines into account:
▪ The stop valves are factory closed.
▪ The following figure shows the stop valve parts required when
handling the valve.
a Service port and service port cap b Valve stem c Field piping connection d Stem cap
▪ Keep both stop valves open during operation.
▪ Do NOT apply excessive force to the valve stem. Doing so may
break the valve body.
▪ ALWAYS make sure to secure the stop valve with a spanner, then
loosen or tighten the flare nut with a torque wrench. Do NOT place the spanner on the stem cap, as this could cause a refrigerant leak.
a Spanner b Torque wrench
▪ When it is expected that the operating pressure will be low (e.g.
when cooling will be performed while the outside air temperature is low), sufficiently seal the flare nut in the stop valve on the gas line with silicon sealant to prevent freezing.
Silicon sealant; make sure there is no gap.
To open/close the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench (liquid side: 4mm, gas side: 6mm)
into the valve stem and turn the valve stem:
Counterclockwise to open. Clockwise to close.
3 When the stop valve CANNOT be turned any further, stop
turning.
4 Install the stop valve cover.
Result: The valve is now open/closed.
To handle the stem cap
▪ The stem cap is sealed where indicated with the arrow. Do NOT
damage it.
▪ After handling the stop valve, tighten the stem cap, and check for
refrigerant leaks.
Piping Ø (mm) Width across flats
Tightening torque (N∙m)
(mm)
6.4 17 15~17
9.5 19 18~20
12.7 22 22~27
15.9 27 48~59
To handle the service cap
▪ ALWAYS use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
▪ After handling the service port, tighten the service port cap, and
check for refrigerant leaks.
Item Tightening torque (N∙m)
Service port cap 11~14
Installer reference guide
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4P600463-1 – 2019.10
6 Installation
a c
b c
a
h
b
f
h
i
e
c
d
e
g
j

6.4.8 To connect the refrigerant piping to the outdoor unit

Piping length. Keep field piping as short as possible.
Piping protection. Protect the field piping against physical
damage.
1 Connect the liquid refrigerant connection from the indoor unit to
the liquid stop valve of the outdoor unit.
a Liquid stop valve b Gas stop valve c Service port
2 Connect the gas refrigerant connection from the indoor unit to
the gas stop valve of the outdoor unit.
NOTICE
It is recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape.

6.5 Checking the refrigerant piping

6.5.1 About checking the refrigerant piping

The outdoor unit's internal refrigerant piping has been factory tested for leaks. You only have to check the outdoor unit's external refrigerant piping.
Before checking the refrigerant piping
Make sure the refrigerant piping is connected between the outdoor unit and the indoor unit.
Typical workflow
Checking the refrigerant piping typically consists of the following stages:
1 Checking for leaks in the refrigerant piping.
2 Performing vacuum drying to remove all moisture, air or
nitrogen from the refrigerant piping.
If there is a possibility of moisture being present in the refrigerant piping (for example, water may have entered the piping), first carry out the vacuum drying procedure below until all moisture has been removed.
NOTICE
Use a 2-stage vacuum pump with a non-return valve that can evacuate to a gauge pressure of −⁠100.7 kPa (−⁠1.007 bar)(5 Torr absolute). Make sure the pump oil does not flow oppositely into the system while the pump is not working.
NOTICE
Use this vacuum pump for R32 exclusively. Using the same pump for other refrigerants may damage the pump and the unit.
NOTICE
▪ Connect the vacuum pump to the service port of the
gas stop valve.
▪ Make sure that the gas stop valve and liquid stop valve
are firmly closed before performing the leak test or vacuum drying.

6.5.3 To check for leaks

NOTICE
Do NOT exceed the unit's maximum working pressure (see "PS High" on the unit name plate).
NOTICE
Make sure to use a recommended bubble test solution from your wholesaler. Do not use soap water, which may cause cracking of flare nuts (soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold), and/or lead to corrosion of flared joints (soap water may contain ammonia which causes a corrosive effect between the brass flare nut and the copper flare).
1 Charge the system with nitrogen gas up to a gauge pressure of
at least 200 kPa (2 bar). It is recommended to pressurize to 3000kPa (30bar) in order to detect small leaks.
2 Check for leaks by applying the bubble test solution to all
connections.
3 Discharge all nitrogen gas.

6.5.4 To perform vacuum drying

Connect the vacuum pump and manifold as follows:

6.5.2 Precautions when checking the refrigerant piping

INFORMATION
Also read the precautions and requirements in the following chapters:
▪ General safety precautions
▪ Preparation
1 Vacuum the system until the pressure on the manifold indicates
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
2 Leave as is for 4-5minutes and check the pressure:
a Pressure meter b Gauge manifold c Low-pressure valve (Lo) d High-pressure valve (Hi) e Charging hoses
f Vacuum pump g Service port h Valve lids
i Gas stop valve j Liquid stop valve
−0.1MPa (−1bar).
Installer reference guide
17
6 Installation
If the pressure… Then…
Does not change There is no moisture in the
system. This procedure is finished.
Increases There is moisture in the
system. Go to the next step.
3 Vacuum the system for at least 2hours to a manifold pressure
of −0.1MPa (−1bar).
4 After turning the pump OFF, check the pressure for at least
1hour.
5 If you do NOT reach the target vacuum or CANNOT maintain
the vacuum for 1hour, do the following:
▪ Check for leaks again. ▪ Perform vacuum drying again.
NOTICE
Be sure to open the gas stop valve after piping installation and vacuuming. Running the system with the valve closed, the compressor may break down.
INFORMATION
After opening the stop valve, it is possible that the pressure in the refrigerant piping does NOT increase. This might be caused by e.g. the closed state of the expansion valve in the outdoor unit circuit, but does NOT present any problem for correct operation of the unit.

6.6 Charging refrigerant

6.6.1 About charging refrigerant

The outdoor unit is factory charged with refrigerant, but in some cases the following might be necessary:
What When
Charging additional refrigerant When the total liquid piping
length is more than specified (see later).
Completely recharging refrigerant Example:
▪ When relocating the system.
▪ After a leak.
Charging additional refrigerant
Before charging additional refrigerant, make sure the outdoor unit's
external refrigerant piping is checked (leak test, vacuum drying).
INFORMATION
Depending on the units and/or the installation conditions, it might be necessary to connect electrical wiring before you can charge refrigerant.
Typical workflow – Charging additional refrigerant typically consists of the following stages:
1 Determining if and how much you have to charge additionally.
2 If necessary, charging additional refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.
3 Vacuum drying on the outdoor unit's internal refrigerant piping is
performed.
NOTICE
Before completely recharging, perform vacuum drying on the outdoor unit's internal refrigerant piping as well.
Typical workflow – Completely recharging refrigerant typically consists of the following stages:
1 Determining how much refrigerant to charge.
2 Charging refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.

6.6.2 Precautions when charging refrigerant

INFORMATION
Also read the precautions and requirements in the following chapters:
▪ General safety precautions
▪ Preparation

6.6.3 About the refrigerant

This product contains fluorinated greenhouse gases. Do NOT vent gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
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: FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Do NOT use cleaning materials or means to accelerate
the defrosting process other than those recommended by the manufacturer.
▪ Be aware that the refrigerant inside the system is
odourless.
Completely recharging refrigerant
Before completely recharging refrigerant, make sure the following is done:
1 All refrigerant is recovered from the system.
2 The outdoor unit's external refrigerant piping is checked (leak
test, vacuum drying).
Installer reference guide
18
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
6 Installation
b
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO2eq
GWP × kg
1000
=
=
+
kg
=
kg
=
GWP: XXX
RXXX
a
f
c
d
e
WARNING
The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a

6.6.7 To fix the fluorinated greenhouse gases label

1 Fill in the label as follows:
heater, or a cooker, this may result in fire, or the formation of a harmful gas.
Turn off any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit.
Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired.

6.6.4 To determine the additional refrigerant amount

If the total liquid
piping length is…
≤30m Do NOT add additional refrigerant.
>30m R=(total length (m) of liquid piping–
30m)×0.020
R=Additional charge (kg) (rounded in units of 0.1kg)
INFORMATION
Piping length is the one-way length of liquid piping.
Maximum allowable refrigerant charge amount
3MXM40, 3MXM52, 3AMXM52, 3MXF52, 3AMXF52 2.2kg
3MXM68, 3MXF68 2.4kg
4MXM68 2.6kg
4MXM80 3.2kg
Then…
2 Fix the label on the inside of the outdoor unit near the gas and
a If a multilingual fluorinated greenhouse gases label is
delivered with the unit (see accessories), peel off the applicable language and stick it on top of a.
b Factory refrigerant charge: see unit name plate c Additional refrigerant amount charged d Total refrigerant charge e Quantity of fluorinated greenhouse gases of the total
refrigerant charge expressed as tonnes CO2 equivalent.
f GWP = Global warming potential
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
Use the GWP value mentioned on the refrigerant charge label. That GWP is based on the current legislation on fluorinated greenhouse gases. The GWP mentioned in the manual might be outdated.
liquid stop valves.
5MXM90 3.3kg

6.7 Connecting the electrical wiring

6.6.5 To determine the complete recharge amount

INFORMATION
If a complete recharge is necessary, the total refrigerant charge is: the factory refrigerant charge (see unit name plate) + the determined additional amount.

6.6.6 To charge additional refrigerant

WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
CAUTION
To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant.
Prerequisite: Before charging refrigerant, make sure the refrigerant piping is connected and checked (leak test and vacuum drying).
1 Connect the refrigerant cylinder to the service port.
2 Charge the additional refrigerant amount.
3 Open the gas stop valve.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10

6.7.1 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 heat pump.
2 Connecting the electrical wiring to the outdoor unit.
3 Connecting the electrical wiring to the indoor unit.
4 Connecting the main power supply of the indoor unit.
5 Connecting the main power supply of the gas boiler.
6 Connecting the communication cable between the gas boiler
and the indoor unit.
7 Connecting the user interface.
8 Connecting the shut–off valves.
9 Connecting the domestic hot water pump.
10 Connecting the alarm output.
11 Connecting the space heating ON/OFF output.
12 Connecting the safety thermostat.

6.7.2 Precautions when connecting the electrical wiring

INFORMATION
Also read the precautions and requirements in the following chapters:
▪ General safety precautions
▪ Preparation
Installer reference guide
19
6 Installation
AC
DC
DC
S20 S21 S22 S23
S92
S93
S40
S80
S70
U W
V
DC-
FU2
S90
S24
AL2 AL1
e
f
g
h
a
b
c
d
DC(-)
FU2
b a
c b
c
aa
A
AA´
c b ba c
a
B
B
1-3
INFORMATION
Appliance shall be installed in accordance with national wiring regulations.
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.
WARNING
Do NOT connect the power supply to the indoor unit. This could result in electrical shock or fire.
WARNING
▪ Do NOT use locally purchased electrical parts inside
the product.
▪ Do NOT branch the power supply for the drain pump,
etc. from the terminal block. This could result in electrical shock or fire.
WARNING
Keep the interconnection wiring away from copper pipes without thermal insulation as such pipes will be very hot.
DANGER: RISK OF ELECTROCUTION
All electrical parts (including thermistors) are powered by the power supply. Do not touch them with bare hands.
e S90~93 – thermistor lead wire connector
f S70 - fan motor lead wire connector g S80 - 4-way valve lead wire connector h Compressor lead wire connector
* May differ depending on the model.

6.7.3 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.
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
DANGER: RISK OF ELECTROCUTION
Disconnect the power supply for more than 10 minutes, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50VDC before you can touch electrical components. For the location of the terminals, see the wiring diagram.
a AL1, AL2 - solenoid valve lead wire connector*
Installer reference guide
20
b S20~24 - electronic expansion valve coil lead wire
connector (room A, B, C, D, E)*
c S40 – thermal overload relay lead wire and high pressure
switch connector*
d Multimeter (DC voltage range)
a Terminal
b Screw
c Flat washer
O Allowed
X NOT allowed
Tightening torques
Item Tightening torque (N•m)
M4 (X1M) 1.2
M4 (earth)
▪ The earth wire between the wire retainer and the terminal must be
longer than the other wires.

6.7.4 Specifications of standard wiring components

Component
Power supply cable
Voltage 220~240V
Phase 1~
Frequency 50Hz
Wire type A
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
6 Installation
1
2
a b
e-B
e-E
e-C
e-D
a-A
e-A
a-C a-D
a-E
a-B
b c
d
L N
1 2 3
1 2 3
a
f
b
a
e
d
c
Component
Interconnection cable (indoor↔outdoor)
4-core cable 1.5mm2 or
2.5mm2 and applicable for 220~240V
H05RN-F (60245 IEC 57)
Recommended circuit breaker B
Earth leakage circuit breaker MUST comply with
applicable legislation
Model A B
3MXM40, 3AMXM52, 3AMXF52, 3MXF52
3MXM52, 3MXF68, 3MXM68,
3- core cable 2.5mm
H05RN-F (60245 IEC 57)
H07RN-F (60245 IEC 66)
3- core cable 4.0mm
H07RN-F (60245 IEC 66)
2
2
20A
25A
4MXM68
4MXM80, 5MXM90
3- core cable 4.0 mm
H07RN-F (60245 IEC 66)
2
32A
Electrical equipment must comply with EN/IEC 61000-3-12, the European/International Technical Standard setting the limits for harmonic currents produced by equipment connected to public low­voltage systems with input current >16 A and ≤75 A per phase.

6.7.5 To connect the electrical wiring on the outdoor unit

1 Remove the switch box cover (1 screw).
b Circuit breaker c Earth leakage circuit breaker d Power supply wire e Interconnection wire for room (A, B, C, D, E)
5 Tighten the terminal screws securely using a Philips
screwdriver.
6 Check that the wires do not disconnect by pulling them lightly.
7 Firmly secure the wire retainer to avoid external stress on wire
terminations.
8 Pass the wiring through the cutout on the bottom of the
protection plate.
9 Make sure the electrical wiring does not contact with the gas
piping.
2 Strip insulation (20mm) from the wires.
a Strip wire end to this point b Excessive strip length may cause electrical shock or
leakage.
3 Connect the wires between the indoor and outdoor units so that
the terminal numbers match. Make sure to match the symbols for piping and wiring.
4 Make sure to connect correct wiring to correct room.
a Wire retainer
10 Reattach the switch box cover and the service cover.

6.8 Finishing the outdoor unit installation

6.8.1 To finish the outdoor unit installation

NOTICE
It is recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape.
1 Insulate and fix the refrigerant piping and interconnection cable
as follows:
a Gas pipe b Gas pipe insulation c Interconnection cable d Liquid pipe e Liquid pipe insulation
f Finishing tape
2 Install the service cover.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
a Terminal for room (A, B, C, D, E)
Installer reference guide
21
6 Installation
E D C B A
E D C B A
A
1
2
3
4
5
SW4
OFFON
2
1
2 1
A
1
2
3
4
5
2
1
SW6
2
OFFON
1
4 3 2 1
4 3 2 1
A
1
2
3
4
5
SW5
2
OFFON
1

6.8.2 About standby electricity saving function

The standby electricity saving function:
▪ turns OFF the power supply to the outdoor unit and,
▪ turns ON the standby electricity saving mode on the indoor unit.
The standby electricity saving function works with following units:
3MXM40, 3MXM52, 3AMXM52 FTXM, FTXP, FTXJ, FVXM
If another indoor unit is used, the connector for standby electric saving must be plugged in.
The standby electricity saving function is turned off before shipping.
To turn on standby electricity saving function
Prerequisite: The main power supply MUST be turned off.
1 Remove the service cover.
2 Disconnect the selective standby electricity saving connector.
3 Turn on the main power supply.

6.8.3 About priority room function

INFORMATION
▪ The priority room function requires initial settings to be
made during the installation of the unit. Ask the customer in which rooms he plans to use this function and make the necessary settings during installation.
▪ The priority room setting is only applicable for an air
conditioner indoor unit and only one room can be set.
The indoor unit for which the priority room setting is applied takes priority in the following cases:
Operation mode priority: If the priority room function is set on an
indoor unit, all other indoor units enter the standby mode.
Priority during high-power operation: If the indoor unit on which
the priority room function is set operates at high power, the other indoor units will run with reduced capabilities.
Quiet operation priority: If the indoor unit on which the priority
room function is set to quiet operation, the outdoor unit will also run quietly.
Ask the customer in which rooms he plans to use this function and make the necessary settings during installation. Setting it in the guest rooms is convenient.
3 Reset the power.

6.8.4 About night quiet mode

The night quiet mode function makes the outdoor unit run more quietly at nighttime. This will reduce the cooling capacity of the unit. Explain Night quiet mode to the customer and confirm if customer wants to use this mode.
To turn on the night quiet mode
1 Remove the switch cover on the service PCB.
2 Set the night quiet mode switch (SW6-1) to ON.

6.8.5 About heat mode lock

Heat mode lock limits the unit to heat operation.
To turn on heat mode lock
1 Remove the switch cover on the service PCB.
2 Set the heat mode lock switch (SW5-1) to ON.
To set the priority room function
1 Remove the switch cover on the service PCB.
2 Set the switch (SW4) for the indoor unit for which you want to
activate the priority room function to ON.
Installer reference guide
22
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10

7 Commissioning

VHR-5N SVH-21T-1
S15
1
3
5

6.8.6 About cool mode lock

Cool mode lock limits the unit to cool operation. Forced operation remains possible in cool mode.
Specifications for the connector housing and pins: ST products, housing VHR‑5N, pin SVH‑21T‑1,1
When cool mode lock is used in combination with the Hybrid for Multi, these units will not operate by the heat pump.
To turn on cool mode lock
1 Short-circuit pins 3 and 5 of connector S15.

7.2 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
ALWAYS operate the unit with thermistors and/or pressure sensors/switches. If NOT, burning of the compressor might be the result.
NOTICE
ALWAYS complete the refrigerant piping of the unit before operating. If NOT, the compressor will break.

7.3 Checklist before commissioning

After the installation of the unit, first check the items listed below. Once all checks are fulfilled, the unit must be closed. Power-up the unit after it is closed.
The indoor unit is properly mounted.
The outdoor unit is properly mounted.

6.8.7 To close the outdoor unit

1 Close the switch box cover.
2 Close the service cover.
NOTICE
When closing the outdoor unit cover, make sure that the tightening torque does NOT exceed 4.1N•m.
7 Commissioning
NOTICE
General commissioning checklist. Next to the
commissioning instructions in this chapter, a general commissioning checklist is also available on the Daikin Business Portal (authentication required).
The general commissioning checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during the commissioning and hand-over to the user.

7.1 Overview: Commissioning

This chapter describes what you have to do and know to commission the system after it is installed.
Typical workflow
Commissioning typically consists of the following stages:
1 Checking the "Checklist before commissioning".
2 Performing a test run for the system.
The system is properly earthed and the earth terminals are tightened.
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.
There are NO damaged components or squeezed pipes on the inside of the indoor and outdoor units.
There are NO refrigerant leaks.
The refrigerant pipes (gas and liquid) are thermally insulated.
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.
Drainage
Make sure drainage flows smoothly.
Possible consequence: Condensate water might drip.
The indoor unit receives the signals of the user interface.
The specified wires are used for the interconnection cable.
The fuses, circuit breakers, or locally installed protection devices are installed according to this document, and have NOT been bypassed.
Check if marks (room A~E) on the wiring and piping match for each indoor unit.
Check if the priority room setting is set for 2 or more rooms. Keep in mind that the DHW generator for Multi or the Hybrid for Multi shall not be selected as the priority room.

7.4 Checklist during commissioning

To perform a wiring check.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
Installer reference guide
23
7 Commissioning
A
1
2
3
4
5
SW3
2
1
To perform an air purge.
To perform a test run.

7.5 Trial operation and testing

For the Hybrid for Multi, certain precautions are required before using this function. For more information, see the indoor unit installation manual and/or the indoor installer reference guide.
Before starting the test run, measure the voltage at the primary side of the safety breaker.
The piping and wiring work match.
The stop valves (gas and liquid) on the outdoor unit are fully open.
Initialization of the Multi system can take several minutes depending on the number of indoor units and options used.

7.5.1 About wiring error check

The wiring error check function will check and automatically correct any wiring errors. This is useful for checking wiring that CANNOT be checked directly, such as underground wiring.
This function CANNOT be used within 3minutes after activating the safety breaker or when the outside air temperature is ≤5°C.
To perform a wiring error check
INFORMATION
▪ You only have to perform a wiring error check if you are
not sure that the electrical wiring and piping is connected correctly.
▪ If you perform a wiring error check, the hybrid for multi
indoor unit will not operate by heat pump for 72hours. During this time, the gas boiler will take over the hybrid operation.
1 Remove the service PCB switch cover.
INFORMATION
▪ The number of LEDs displayed depends on the number
of rooms.
▪ The wiring error check function will NOT work if outside
temperature is ≤5°C.
▪ After wiring error check operation is completed, LED
indication will continue until normal operation starts.
▪ Follow the product diagnosis procedures. For details of
product error diagnosis refer to service manual.
Status of LEDs:
▪ All LEDs flash: automatic correction is NOT possible.
▪ LEDs flash alternately: automatic correction is completed.
▪ One or more LEDs are permanently on: abnormal stop (follow the
diagnosis procedure on the back of the right side plate and refer to service manual).

7.5.2 To perform a test run

Prerequisite: Power supply MUST be in the specified range.
Prerequisite: Test run operation may be done in cooling or heating
mode.
Prerequisite: Test run should be done in accordance with the operation manual of the indoor unit to make sure that all functions and parts are working properly.
1 In cooling mode, select the lowest programmable temperature.
In heating mode, select the highest programmable temperature.
2 Measure the temperature at the indoor unit inlet and outlet after
running the unit for about 20minutes. The difference should be more than 8°C (cooling) or 20°C (heating).
3 First check operation of each unit individually, then check
simultaneous operation of all indoor units. Check both heating and cooling operation.
4 When test run is finished, set the temperature to a normal level.
In cooling mode: 26~28°C, in heating mode: 20~24°C.
INFORMATION
▪ Test run can be disabled if necessary.
▪ After the unit is turned OFF, it cannot be started again
for 3 minutes.
▪ When the test run is started in the heat mode right after
turning the safety breaker on, in some cases no air will be output for about 15 minutes in order to protect the unit.
▪ Operate only air conditioner during test run. Do NOT
operate the Hybrid for Multi or the DHW generator during test run.
▪ During cooling operation, frost may form on the gas
stop valve or other parts. This is normal.
2 Press the wiring error check switch (SW3) on the outdoor unit
service PCB.
Result: The service monitor LEDs indicate whether correction is possible or not. For details about how to read the LED display, refer to the service manual.
Result: Wiring errors will be corrected after 15-20 minutes. If automatic correction is not possible, check the indoor unit wiring and piping in the usual way.
Installer reference guide
24
INFORMATION
▪ Even if the unit is turned OFF, it consumes electricity.
▪ When the power turns back on after a power break, the
previously selected mode will be resumed.

7.6 Starting up the outdoor unit

See the indoor unit installation manual for configuration and commissioning of the system.
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10

8 Hand-over to the user

7.7 Fault diagnosis using LED on outdoor unit PCB

Symbol LED is...
On
Off
Flashing
Red LED
1 2 3 4 5
(a)
Diagnosis
Normal.
▪ Check the indoor unit.
High-pressure protector worked or freeze-up in operating unit, or stand-by unit.
Overload relay worked or high discharge pipe temperature.
Faulty compressor start.
Input over-current.
Thermistor or CT abnormality.
High temperature switch-box.
High temperature at inverter circuit heat sink.
Output over-current.
Refrigerant shortage.
Low voltage to main circuit or over voltage to main circuit.
Reversing solenoid valve switching failure or high-pressure switching failure.
Faulty outdoor unit PCB.
Fan motor fault.
Wiring error
▪ Check wiring.
(a)
The number of LEDs displayed depends on the number of rooms.
(b)
Diagnosis may not apply to some cases. For more details, refer to the service manual.
(b)
(b)
(b)
(b)
(b)
▪ Show the user what to do for the maintenance of the unit.

9 Maintenance and service

NOTICE
General maintenance/inspection checklist. Next to the
maintenance instructions in this chapter, a general maintenance/inspection checklist is also available on the Daikin Business Portal (authentication required).
The general maintenance/inspection checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during maintenance.
NOTICE
Maintenance MUST be done by an authorized installer or service agent.
We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals.
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

9.1 Overview: Maintenance and service

This chapter contains information about:
▪ Maintenance safety precautions
▪ The yearly maintenance of the outdoor unit

9.2 Maintenance safety precautions

DANGER: RISK OF ELECTROCUTION
Green LED-A Diagnosis
Normal.
▪ Check the indoor unit.
Turn the power OFF and back ON, and check the LED within approximately 3 minutes. If the LED is ON again, the outdoor unit PCB is faulty.
Power supply fault.
(a)
Diagnosis may not apply to some cases. For more details, refer to the service manual.
(a)
8 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.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
DANGER: RISK OF BURNING
NOTICE:Risk of electrostatic discharge
Before performing any maintenance or service work, touch a metal part of the unit in order to eliminate static electricity and to protect the PCB.

9.3 Checklist for yearly maintenance of the outdoor unit

Check the following at least once a year:
▪ Heat exchanger
The heat exchanger of the outdoor unit can get blocked up due to dust, dirt, leaves, etc. It is recommended to clean the heat exchanger yearly. A blocked heat exchanger can lead to too low pressure or too high pressure leading to worse performance.

9.4 About the compressor

When servicing the compressor keep in mind following precautions:
Installer reference guide
25

10 Troubleshooting

DANGER: RISK OF ELECTROCUTION
▪ Use this compressor on a grounded system only.
▪ Turn the power off before servicing the compressor.
▪ Reattach the switch box cover and service lid after
servicing.
CAUTION
Always wear safety goggles and protective gloves.
DANGER: RISK OF EXPLOSION
▪ Use a pipe cutter to remove the compressor.
▪ Do NOT use the brazing torch.
▪ Use approved refrigerants and lubricants only.
DANGER: RISK OF BURNING
Do NOT touch the compressor with bare hands.
10 Troubleshooting

10.1 Overview: Troubleshooting

This chapter describes what you have to do in case of problems.
It contains information about solving problems based on symptoms.
Before troubleshooting
Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring.

10.3 Solving problems based on symptoms

10.3.1 Symptom: Indoor units fall, vibrate or make noise

Possible causes Corrective action
The indoor units are not installed securely

10.3.2 Symptom: The unit is NOT heating or cooling as expected

Possible causes Corrective action
Wrong connection of the electrical wires
Gas leakage Check for gas leakage.
Marks on the wiring and piping do NOT match

10.3.3 Symptom: Water leakage

Possible causes Corrective action
Incomplete thermal insulation (gas and liquid piping, indoor portions of the drain hose extension)
Improperly connected drainage Secure the drainage.
Install the indoor units securely.
Connect the electrical wires correctly.
Marks on the wiring and piping (room A, room B, room C, room D, room E) for each indoor unit MUST match.
Make sure the thermal insulation of the piping and the drain hose is complete.

10.2 Precautions when troubleshooting

WARNING
▪ When carrying out an inspection on the switch box of
the unit, ALWAYS make sure that the unit is disconnected from the mains. Turn off the respective circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before resetting it. NEVER shunt safety devices or change their values to a value other than the factory default setting. If you are unable to find the cause of the problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazards due to inadvertent resetting of the thermal cut-out: power to this appliance MUST NOT be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly turned ON and OFF by the utility.
DANGER: RISK OF BURNING

10.3.4 Symptom: Electrical leakage

Possible causes Corrective action
The unit is NOT earthed correctly Check and correct the
connection of the earth wiring.

10.3.5 Symptom: Priority room setting does NOT function

Possible causes Corrective action
The priority room setting may be set for more than 1 room.
The Hybrid for Multi can NOT be selected as priority room.
A domestic hot water for Multi can NOT be selected as priority room.
Only 1 room may be selected for the priority room setting.
Select another indoor unit for the priority room setting.
Please select an airconditioning unit as priority room.

10.3.6 Symptom: Unit does NOT function or burn damage

Possible causes Corrective action
The wiring was NOT performed in accordance with the specifications
Correct the wiring.
Installer reference guide
26
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
11 Disposal
a
c
b
d
d
e
4 3 2 1
2 1
4 3 2 1
2 1
HEAT
COOL
A
1
2
3
4
5
2
3
SW5
SW6
SW2
OFFON
1
A
1
2
3
4
5
7
SW1
6
4
5 =
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.

11.1 Overview: Disposal

Typical workflow
Disposing of the system typically consists of the following stages:
1 Pumping down the system.
2 Bringing the system to a specialized treatment facility.
INFORMATION
For more details, see the service manual.

11.2 To pump down

NOTICE
For the Hybrid for Multi, all required precautions must be taken to avoid possible freezing damage at the water heat exchanger before this function is allowed to be used or activated. For detailed information see the indoor installation manual.
Example: To protect the environment, pump down when relocating the unit or when disposing of the unit.

11 Disposal

a Gas stop valve b Closing direction c Hexagonal wrench d Valve cap e Liquid stop valve

11.3 To start and stop forced cooling

1 Turn OFF the power.
2 Remove the service cover and the switch box cover.
3 Remove the service PCB switch cover.
4 Set DIP switch SW5 and SW6 to OFF.
5 Set DIP switch SW2 to COOL.
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.
NOTICE
6 Reattach the service PCB switch cover, switch box cover and
service cover.
7 Turn ON the outdoor unit.
8 Press the forced cooling operation switch SW1 to begin forced
cooling.
9 Press the forced cooling operation switch SW1 to stop forced
cooling.
During pump down operation, stop the compressor before removing the refrigerant piping. If the compressor is still running and the stop valve is open during pump down, air will be sucked into the system. Compressor breakdown or damage to the system can result due to abnormal pressure in the refrigerant cycle.
Pump down operation will extract all refrigerant from the system into the outdoor unit.
1 Remove the valve cap from the liquid stop valve and the gas
stop valve.
2 Carry out forced cooling. See "11.3 To start and stop forced
cooling"[427].
3 After 5 to 10minutes (after only 1 or 2minutes in case of very
low ambient temperatures (<−10°C)), close the liquid stop valve with a hexagonal wrench.
4 Check on the manifold if the vacuum is reached.
5 After 2-3 minutes, close the gas stop valve and stop forced
cooling.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
NOTICE
Take care that while running forced cooling operation, the water temperature remains higher than 5°C (see temperature read out of the indoor unit). You can achieve this, for example, by activating all fans of the fan coil units.
Installer reference guide
27

12 Technical data

,
A
INDOOR
OUTDOOR
12 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
Business Portal (authentication required).

12.1 Wiring diagram

12.1.1 Unified wiring diagram legend

For applied parts and numbering, refer to the wiring diagram on the unit. Part numbering is by Arabic numbers in ascending order for each part and is represented in the overview below by "*" in the part code.
Symbol Meaning Symbol Meaning
Circuit breaker Protective earth
Connection Protective earth
(screw)
Connector
Earth Relay connector
Field wiring Short-circuit
Fuse Terminal
Indoor unit Terminal strip
Outdoor unit Wire clamp
Symbol Colour Symbol Colour
BLK Black ORG Orange
BLU Blue PNK Pink
BRN Brown PRP, PPL Purple
GRN Green RED Red
GRY Grey WHT White
YLW Yellow
Symbol Meaning
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
HAP Light emitting diode (service
HIGH VOLTAGE High voltage
IES Intelligent eye sensor
IPM* Intelligent power module
Connection, connector
Fuse
monitor green)
Rectifier
connector
Symbol Meaning
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* PTC thermistor
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 arrester
SR*, WLU Signal receiver
SS* Selector switch
SHEET METAL Terminal strip fixed plate
T*R Transformer
TC, TRC Transmitter
V*, R*V Varistor
V*R Diode bridge
WRC Wireless remote controller
X* Terminal
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
A*P Printed circuit board
BS* Pushbutton ON/OFF, operation
switch
BZ, H*C Buzzer
C* Capacitor
Installer reference guide
28
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
12 Technical data
7.9CuT
7.9CuT
7.9CuT
7.9CuT
12.7CuT
M
12.7CuT
(12.7CuT)
(9.5CuT)
(12.7CuT)
12.7CuT
12.7CuT
12.7CuT
12.7CuT
12.7CuT
15.9CuT
15.9CuT
15.9CuT
7.9CuT
9.5CuT
12.7CuT
7.9CuT
7.9CuT
7.9CuT
MV
MV
MV
A
B
C
6.4CuT
6.4CuT
6.4CuT
(6.4CuT)
(6.4CuT)
(6.4CuT)
9.5CuT
9.5CuT
9.5CuT
9.5CuT
7.9CuT
S1PH
d
e
f
k
a
b
c
g
i
d
r
s
t
v-A
v-B
v-C
u
d
p
o o
n
l
m
l
l
w
x
v-A
v-B
v-C
q
h
7.9CuT
7.9CuT
7.9CuT
7.9CuT
12.7CuT
M
12.7CuT
(12.7CuT)
(9.5CuT)
(12.7CuT)
12.7CuT
12.7CuT
12.7CuT
12.7CuT
15.9CuT
15.9CuT
15.9CuT
15.9CuT
9.5CuT
9.5CuT
12.7CuT
7.9CuT
7.9CuT
7.9CuT
MV
MV
MV
A
B
C
6.4CuT
6.4CuT
6.4CuT
(6.4CuT)
(6.4CuT)
(6.4CuT)
9.5CuT
9.5CuT
9.5CuT
9.5CuT
7.9CuT
S1PH
SV
9.5CuT
9.5CuT
6.4CuT
12.7CuT
15.9CuT
d
e
f
k
a
b
c
g
i
j
d
r
s
t
u
d
p
oo
n
l l
m
l
w
x
v-A
v-B
v-C
v-A
v-B
v-C
q
h
Symbol Meaning
AC*, CN*, E*, HA*, HE*, HL*,
Connection, connector HN*, HR*, MR*_A, MR*_B, S*, U, V, W, X*A, K*R_*

12.2 Piping diagram: Outdoor unit

Component PED category classification:
▪ High pressure switches: category IV
3MXM40, 3MXM52, 3AMXM52, 3AMXF52, 3MXF52
▪ Compressor: category II
▪ Accumulator: 4MXM80, 5MXM90 category II, other models
category I
▪ Other components: refer to PED article 4, paragraph 3
NOTICE
When the high pressure switch is activated, it MUST be reset by a qualified person.
3MXM68, 3MXF68
Installer reference guide
29
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
12 Technical data
7.9CuT
7.9CuT
7.9CuT
7.9CuT
12.7CuT
M
12.7CuT
(9.5CuT)
(9.5CuT)
(12.7CuT)
12.7CuT
12.7CuT
12.7CuT
12.7CuT
15.9CuT
15.9CuT
15.9CuT
15.9CuT
9.5CuT
9.5CuT
12.7CuT
7.9CuT
7.9CuT
7.9CuT
MV
MV
MV
A
B
C
6.4CuT
6.4CuT
6.4CuT
(6.4CuT)
(6.4CuT)
(6.4CuT)
9.5CuT
9.5CuT
9.5CuT
9.5CuT
7.9CuT
S1PH
SV
9.5CuT
9.5CuT
6.4CuT
12.7CuT
7.9CuT
MV
D
6.4CuT
(6.4CuT)
(12.7CuT)
12.7CuT
15.9CuT
d
e
f
k
a
b
c
g
i
j
d
r
s
t
v-A
u-A
u-B
u-C
u-D
v-B
v-C
v-D
u
d
p
oo
n
l
m
l
l
w
x
q
h
7.9CuT
7.9CuT
7.9CuT
7.9CuT
12.7CuT
M
12.7CuT
(12.7CuT)
(9.5CuT)
(15.9CuT)
12.7CuT
12.7CuT
12.7CuT
12.7CuT
15.9CuT
15.9CuT
15.9CuT
15.9CuT
9.5CuT
9.5CuT
12.7CuT
7.9CuT
7.9CuT
7.9CuT
MV
MV
MV
A
B
C
6.4CuT
6.4CuT
6.4CuT
9.5CuT
9.5CuT
9.5CuT
9.5CuT
S1PH
SV
9.5CuT
9.5CuT
6.4CuT
12.7CuT
7.9CuT
MV
D
6.4CuT
(15.9CuT)
12.7CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
9.5CuT
9.5CuT
15.9CuT
(6.4CuT)
(6.4CuT)
(6.4CuT)
(6.4CuT)
d
e
f
k
a
a
b
c
g
i
j
d
r
s
t
v-A
u-A
u-B
u-C
u-D
v-B
v-C
v-D
u
d
p
oo
n
l
m
l
l
w
x
q
h
y y
4MXM68
4MXM80
Installer reference guide
30
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
5MXM90
7.9CuT
7.9CuT
7.9CuT
7.9CuT
12.7CuT
M
12.7CuT
(9.5CuT)
(9.5CuT)
(12.7CuT)
12.7CuT
12.7CuT
12.7CuT
12.7CuT
15.9CuT
15.9CuT
15.9CuT
15.9CuT
9.5CuT
9.5CuT
12.7CuT
7.9CuT
7.9CuT
7.9CuT
MV
MV
MV
A
B
C
6.4CuT
6.4CuT
6.4CuT
(6.4CuT)
(6.4CuT)
(6.4CuT)
9.5CuT
9.5CuT
9.5CuT
S1PH
SV
9.5CuT
9.5CuT
6.4CuT
12.7CuT
7.9CuT
MV
D
6.4CuT
(6.4CuT)
(15.9CuT)
12.7CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
7.9CuT
MV
E
6.4CuT
(6.4CuT)
(15.9CuT)
12.7CuT
15.9CuT
9.5CuT
9.5CuT
9.5CuT
d
e
f
k
a
a
b
c
g
i
j
d
r
s
t
v-A
u-A
u-B
u-C
u-D
u-E
v-B
v-C
v-D
v-E
u
d
p
oo
n
l
m
l
l
w
x
q
h
y y

13 Glossary

a Heat exchanger b Outdoor air temperature thermistor c Heat exchanger thermistor d Refnet header e Fan motor
f Propeller fan g Capillary tube h Distributor
i Muffler with filter j Solenoid valve
k 4-way valve
l Muffler
m Discharge pipe thermistor
n Compressor o Accumulator p Gas stop valve q Liquid stop valve
r Electronic expansion valve s Thermistor (liquid)
t Filter u Thermistor (gas) v Room
w Field piping – liquid
x Field piping – gas y Liquid receiver
S1PH High pressure switch (automatic reset)
Refrigerant flow: cooling Refrigerant flow: heating
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
13 Glossary
Dealer
Sales distributor for the product.
Authorised installer
Technical skilled person who is qualified to install the product.
User
Applicable legislation
Person who is owner of the product and/or operates the product.
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.
3(A)MXM+3(A)MXF+4MXM+5MXM R32 Split series 4P600463-1 – 2019.10
Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation.
Installer reference guide
31
4P600463-1 2019.10
Copyright 2019 Daikin
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