Daikin VRV 5-S Series User guide

Installer and user reference guide
VRV 5-S system air conditioner
RXYSA4A7V1B
RXYSA5A7V1B
RXYSA6A7V1B
RXYSA4A7Y1B
RXYSA5A7Y1B
RXYSA6A7Y1B

Table of contents
Installer and user reference guide
2
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
Table of contents
1 About the documentation 6
1.1 About this document ...................................................................................................................................................... 6
2 General safety precautions 7
2.1 About the documentation .............................................................................................................................................. 7
2.1.1 Meaning of warnings and symbols ................................................................................................................ 7
2.2 For the installer............................................................................................................................................................... 8
2.2.1 General ........................................................................................................................................................... 8
2.2.2 Installation site ............................................................................................................................................... 9
2.2.3 Refrigerant...................................................................................................................................................... 9
2.2.4 Brine................................................................................................................................................................ 11
2.2.5 Water .............................................................................................................................................................. 12
2.2.6 Electrical ......................................................................................................................................................... 12
3 Specific installer safety instructions 14
3.1 Instructions for equipment using R32 refrigerant ......................................................................................................... 17
3.1.1 Installation space requirements..................................................................................................................... 18
3.1.2 System layout requirements .......................................................................................................................... 19
3.1.3 To determine the charge limitations ............................................................................................................. 23
For the user 28
4 User safety instructions 29
4.1 General............................................................................................................................................................................ 29
4.2 Instructions for safe operation ....................................................................................................................................... 30
5 About the system 32
5.1 System layout.................................................................................................................................................................. 32
6 User interface 33
7 Before operation 34
8 Operation 35
8.1 Operation range.............................................................................................................................................................. 35
8.2 Operating the system ..................................................................................................................................................... 35
8.2.1 About operating the system........................................................................................................................... 35
8.2.2 About cooling, heating, fan only, and automatic operation ......................................................................... 35
8.2.3 About the heating operation.......................................................................................................................... 35
8.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch)...................................... 36
8.2.5 To operate the system (WITH cool/heat changeover remote control switch)............................................. 36
8.3 Using the dry program.................................................................................................................................................... 38
8.3.1 About the dry program................................................................................................................................... 38
8.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch) .................................... 38
8.3.3 To use the dry program (WITH cool/heat changeover remote control switch) ........................................... 38
8.4 Adjusting the air flow direction ...................................................................................................................................... 40
8.4.1 About the air flow flap.................................................................................................................................... 40
8.5 Setting the master user interface................................................................................................................................... 41
8.5.1 About setting the master user interface........................................................................................................ 41
8.5.2 To designate the master user interface......................................................................................................... 41
9 Energy saving and optimum operation 42
9.1 Available main operation methods ................................................................................................................................ 43
9.2 Available comfort settings .............................................................................................................................................. 43
10 Maintenance and service 44
10.1 Maintenance after a long stop period............................................................................................................................ 44
10.2 Maintenance before a long stop period......................................................................................................................... 45
10.3 About the refrigerant...................................................................................................................................................... 45
10.4 After-sales service and warranty .................................................................................................................................... 46
10.4.1 Warranty period ............................................................................................................................................. 46
10.4.2 Recommended maintenance and inspection................................................................................................ 46
10.4.3 Recommended maintenance and inspection cycles ..................................................................................... 46
10.4.4 Shortened maintenance and replacement cycles ......................................................................................... 47
11 Troubleshooting 49

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VRV 5-S system air conditioner
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11.1 Error codes: Overview .................................................................................................................................................... 51
11.2 Symptoms that are NOT system malfunctions............................................................................................................... 53
11.2.1 Symptom: The system does not operate....................................................................................................... 53
11.2.2 Symptom: Cool/Heat cannot be changed over ............................................................................................. 53
11.2.3 Symptom: Fan operation is possible, but cooling and heating do not work ................................................ 53
11.2.4 Symptom: The fan speed does not correspond to the setting...................................................................... 53
11.2.5 Symptom: The fan direction does not correspond to the setting................................................................. 53
11.2.6 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 54
11.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 54
11.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 54
11.2.9 Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 54
11.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 54
11.2.11 Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 54
11.2.12 Symptom: Dust comes out of the unit........................................................................................................... 55
11.2.13 Symptom: The units can give off odours ....................................................................................................... 55
11.2.14 Symptom: The outdoor unit fan does not spin.............................................................................................. 55
11.2.15 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 55
11.2.16 Symptom: The inside of an outdoor unit is warm even when the unit has stopped.................................... 55
11.2.17 Symptom: Hot air can be felt when the indoor unit is stopped.................................................................... 55
12 Relocation 56
13 Disposal 57
14 Technical data 58
14.1 Information requirements for Eco Design...................................................................................................................... 58
For the installer 59
15 About the box 60
15.1 Overview: About the box ................................................................................................................................................ 60
15.2 Outdoor unit ................................................................................................................................................................... 61
15.2.1 To unpack the outdoor unit ........................................................................................................................... 61
15.2.2 To handle the outdoor unit............................................................................................................................ 61
15.2.3 To remove the accessories from the outdoor unit........................................................................................ 62
16 About the units and options 63
16.1 Overview: About the units and options.......................................................................................................................... 63
16.2 Identification ................................................................................................................................................................... 64
16.2.1 Identification label: Outdoor unit .................................................................................................................. 64
16.3 About the outdoor unit................................................................................................................................................... 64
16.4 System layout.................................................................................................................................................................. 65
16.5 Combining units and options.......................................................................................................................................... 65
16.5.1 About combining units and options............................................................................................................... 65
16.5.2 Possible combinations of indoor units........................................................................................................... 65
16.5.3 Possible options for the outdoor unit............................................................................................................ 66
17 Unit installation 67
17.1 Preparing the installation site......................................................................................................................................... 67
17.1.1 Installation site requirements of the outdoor unit........................................................................................ 67
17.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 70
17.2 Opening and closing the unit.......................................................................................................................................... 71
17.2.1 About opening the units................................................................................................................................. 71
17.2.2 To open the outdoor unit............................................................................................................................... 71
17.2.3 To close the outdoor unit............................................................................................................................... 71
17.3 Mounting the outdoor unit............................................................................................................................................. 73
17.3.1 About mounting the outdoor unit ................................................................................................................. 73
17.3.2 Precautions when mounting the outdoor unit.............................................................................................. 73
17.3.3 To provide the installation structure ............................................................................................................. 73
17.3.4 To install the outdoor unit ............................................................................................................................. 74
17.3.5 To provide drainage........................................................................................................................................ 74
17.3.6 To prevent the outdoor unit from falling over .............................................................................................. 75
18 Piping installation 77
18.1 Preparing refrigerant piping ........................................................................................................................................... 77
18.1.1 Refrigerant piping requirements.................................................................................................................... 77
18.1.2 Refrigerant piping material ............................................................................................................................ 77
18.1.3 To select the piping size ................................................................................................................................. 78
18.1.4 To select refrigerant branch kits .................................................................................................................... 79
18.1.5 Refrigerant piping length and height difference ........................................................................................... 80

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18.2 Connecting the refrigerant piping .................................................................................................................................. 81
18.2.1 About connecting the refrigerant piping ....................................................................................................... 81
18.2.2 Precautions when connecting the refrigerant piping.................................................................................... 81
18.2.3 Pipe bending guidelines ................................................................................................................................. 82
18.2.4 To braze the pipe end..................................................................................................................................... 82
18.2.5 Using the stop valve and service port............................................................................................................ 83
18.2.6 To remove the spun pipes.............................................................................................................................. 84
18.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 85
18.2.8 To connect the refrigerant branching kit....................................................................................................... 87
18.3 Checking the refrigerant piping ...................................................................................................................................... 88
18.3.1 About checking the refrigerant piping........................................................................................................... 88
18.3.2 Checking refrigerant piping: General guidelines ........................................................................................... 89
18.3.3 Checking refrigerant piping: Setup ................................................................................................................ 89
18.3.4 To perform a leak test .................................................................................................................................... 90
18.3.5 To perform vacuum drying............................................................................................................................. 90
19 Charging refrigerant 92
19.1 About charging refrigerant ............................................................................................................................................. 92
19.2 About the refrigerant...................................................................................................................................................... 93
19.3 Precautions when charging refrigerant.......................................................................................................................... 94
19.4 To determine the additional refrigerant amount .......................................................................................................... 96
19.5 To charge refrigerant ...................................................................................................................................................... 97
19.6 Error codes when charging refrigerant .......................................................................................................................... 99
19.7 To fix the fluorinated greenhouse gases label ............................................................................................................... 99
19.8 To check for refrigerant leaks after charging ................................................................................................................. 100
20 Electrical installation 101
20.1 About connecting the electrical wiring .......................................................................................................................... 101
20.1.1 Precautions when connecting the electrical wiring....................................................................................... 101
20.1.2 Field wiring: Overview .................................................................................................................................... 102
20.1.3 Guidelines when knocking out knockout holes ............................................................................................. 104
20.1.4 Guidelines when connecting the electrical wiring......................................................................................... 104
20.1.5 About electrical compliance........................................................................................................................... 105
20.1.6 Safety device requirements ........................................................................................................................... 106
20.2 To connect the electrical wiring to the outdoor unit..................................................................................................... 107
20.3 To connect the external outputs .................................................................................................................................... 110
21 Finishing the outdoor unit installation 112
21.1 To insulate the refrigerant piping................................................................................................................................... 112
21.2 To close the outdoor unit ............................................................................................................................................... 115
21.3 To check the insulation resistance of the compressor .................................................................................................. 115
22 Configuration 116
22.1 Overview: Configuration................................................................................................................................................. 116
22.2 Making field settings....................................................................................................................................................... 117
22.2.1 About making field settings............................................................................................................................ 117
22.2.2 To access the field setting components......................................................................................................... 118
22.2.3 Field setting components............................................................................................................................... 118
22.2.4 To access mode 1 or 2.................................................................................................................................... 119
22.2.5 To use mode 1 ................................................................................................................................................ 120
22.2.6 To use mode 2 ................................................................................................................................................ 121
22.2.7 Mode 1: Monitoring settings ......................................................................................................................... 122
22.2.8 Mode 2: Field settings .................................................................................................................................... 123
22.3 Energy saving and optimum operation .......................................................................................................................... 129
22.3.1 Available main operation methods................................................................................................................ 129
22.3.2 Available comfort settings.............................................................................................................................. 130
22.3.3 Example: Automatic mode during cooling..................................................................................................... 132
22.3.4 Example: Automatic mode during heating .................................................................................................... 133
23 Commissioning 135
23.1 Precautions when commissioning .................................................................................................................................. 135
23.2 Checklist before commissioning ..................................................................................................................................... 136
23.3 Checklist during commissioning ..................................................................................................................................... 137
23.4 About the test run........................................................................................................................................................... 137
23.5 To perform a test run (7-segments display)................................................................................................................... 137
23.6 Correcting after abnormal completion of the test run .................................................................................................. 138
24 Hand-over to the user 139
25 Maintenance and service 140
25.1 Overview: Maintenance and service .............................................................................................................................. 140

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25.2 Maintenance safety precautions .................................................................................................................................... 141
25.2.1 To prevent electrical hazards ......................................................................................................................... 141
25.3 Checklist for yearly maintenance of the outdoor unit................................................................................................... 142
25.4 About service mode operation ....................................................................................................................................... 142
25.4.1 To use vacuum mode ..................................................................................................................................... 142
25.4.2 To recover refrigerant .................................................................................................................................... 143
26 Troubleshooting 144
26.1 Overview: Troubleshooting ............................................................................................................................................ 144
26.2 Precautions when troubleshooting ................................................................................................................................ 145
26.3 Solving problems based on error codes ......................................................................................................................... 145
26.3.1 Error codes: Overview .................................................................................................................................... 145
26.4 Refrigerant leak detection system.................................................................................................................................. 149
27 Disposal 151
28 Technical data 152
28.1 Service space: Outdoor unit ........................................................................................................................................... 153
28.2 Piping diagram: Outdoor unit ......................................................................................................................................... 155
28.3 Wiring diagram: Outdoor unit ........................................................................................................................................ 156
29 Glossary 160

1 | About the documentation
Installer and user reference guide
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RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
1 About the documentation
In this chapter
1.1 About this document.............................................................................................................................................................. 6
1.1 About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained users in shops, in light
industry and on farms, or for commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set consists of:
▪General safety precautions:
-Safety instructions that you must read before installing
-Format: Paper (in the box of the outdoor unit)
▪Outdoor unit installation and operation manual:
-Installation and operation instructions
-Format: Paper (in the box of the outdoor unit)
▪Installer and user reference guide:
-Preparation of the installation, reference data,…
-Detailed step-by-step instructions and background information for basic and
advanced usage
-Format: Digital files on http://www.daikineurope.com/support-and-manuals/
product-information/
Latest revisions of the supplied documentation may be available on the regional
Daikin website or via your dealer.
The original documentation is written in English. All other languages are
translations.
Technical engineering data
▪A subset of the latest technical data is available on the regional Daikin website
(publicly accessible).
▪The full set of latest technical data is available on the Daikin Business Portal
(authentication required).

2 | General safety precautions
Installer and user reference guide
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VRV 5-S system air conditioner
4P600330-1 – 2020.01
2 General safety precautions
2.1 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.
2.1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING
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.
Symbols used on the unit:

2 | General safety precautions
Installer and user reference guide
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VRV 5-S system air conditioner
4P600330-1 – 2020.01
Symbol Explanation
Before installation, read the installation and operation
manual, and the wiring instruction sheet.
Before performing maintenance and service tasks, read the
service manual.
For more information, see the installer and user reference
guide.
The unit contains rotating parts. Be careful when servicing or
inspecting the unit.
Symbols used in the documentation:
Symbol Explanation
Indicates a figure title or a reference to it.
Example: " 1–3 Figure title" means "Figure 3 in chapter 1".
Indicates a table title or a reference to it.
Example: " 1–3 Table title" means "Table 3 in chapter 1".
2.2 For the installer
2.2.1 General
If you are NOT sure how to install or operate the unit, contact your dealer.
DANGER: RISK OF BURNING
▪Do NOT touch the refrigerant piping, water piping or internal parts during and
immediately after operation. It could be too hot or too cold. Give it time to return
to normal temperature. If you must touch it, wear protective gloves.
▪Do NOT touch any accidental leaking refrigerant.
WARNING
Improper installation or attachment of equipment or accessories could result in
electrical shock, short-circuit, leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or approved by Daikin.
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.

2 | General safety precautions
Installer and user reference guide
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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.
CAUTION
▪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.
2.2.2 Installation site
▪Provide sufficient space around the unit for servicing and air circulation.
▪Make sure the installation site withstands the weight and vibration of the unit.
▪Make sure the area is well ventilated. Do NOT block any ventilation openings.
▪Make sure the unit is level.
Do NOT install the unit in the following places:
▪In potentially explosive atmospheres.
▪In places where there is machinery that emits electromagnetic waves.
Electromagnetic waves may disturb the control system, and cause malfunction of
the equipment.
▪In places where there is a risk of fire due to the leakage of flammable gases
(example: thinner or gasoline), carbon fibre, ignitable dust.
▪In places where corrosive gas (example: sulphurous acid gas) is produced.
Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.
2.2.3 Refrigerant
If applicable. See the installation manual or installer reference guide of your
application for more information.

2 | General safety precautions
Installer and user reference guide
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4P600330-1 – 2020.01
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.
▪In case of R410A or R32 refrigerant: Toxic gas might be produced if refrigerant
gas comes into contact with fire.
▪In case of CO2 refrigerant: Refrigerant gas is toxic in high concentrations.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump down the system, and there
is a leak in the refrigerant circuit:
▪Do NOT use the unit's automatic pump down function, with which you can collect
all refrigerant from the system into the outdoor unit. Possible consequence: Self-
combustion and explosion of the compressor because of air going into the
operating compressor.
▪Use a separate recovery system so that the unit's compressor does NOT have to
operate.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
NOTICE
After all the piping has been connected, make sure there is no gas leak. Use nitrogen
to perform a gas leak detection.
NOTICE
▪To avoid compressor breakdown, do NOT charge more than the specified amount
of refrigerant.
▪When the refrigerant system is to be opened, refrigerant MUST be treated
according to the applicable legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant may only be charged after
performing the leak test and the vacuum drying.
Possible consequence: Self-combustion and explosion of the compressor because of
oxygen going into the operating compressor.

2 | General safety precautions
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▪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
(i.e., the cylinder is marked with "Liquid
filling siphon attached")
Charge with the cylinder upright.
A siphon tube is NOT present Charge with the cylinder upside down.
▪Open refrigerant cylinders slowly.
▪Charge the refrigerant in liquid form. Adding it in gas form may prevent normal
operation.
CAUTION
When the refrigerant charging procedure is done or when pausing, close the valve of
the refrigerant tank immediately. If the valve is NOT closed immediately, remaining
pressure might charge additional refrigerant. Possible consequence: Incorrect
refrigerant amount.
2.2.4 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.

2 | General safety precautions
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2.2.5 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.
2.2.6 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.
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
electrical shock or fire.
▪When installing the earth leakage protector, make sure it is compatible with the
inverter (resistant to high frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.

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CAUTION
▪When connecting the power supply: connect the earth cable first, before making
the current-carrying connections.
▪When disconnecting the power supply: disconnect the current-carrying cables
first, before separating the earth connection.
▪The length of the conductors between the power supply stress relief and the
terminal block itself must be as such that the current-carrying wires are tautened
before the earth wire is in case the power supply is pulled loose from the stress
relief.
NOTICE
Precautions when laying power wiring:
▪Do NOT connect wiring of different thicknesses to the power terminal block (slack
in the power wiring may cause abnormal heat).
▪When connecting wiring which is the same thickness, do as shown in the figure
above.
▪For wiring, use the designated power wire and connect firmly, then secure to
prevent outside pressure being exerted on the terminal board.
▪Use an appropriate screwdriver for tightening the terminal screws. A screwdriver
with a small head will damage the head and make proper tightening impossible.
▪Over-tightening the terminal screws may break them.
Install power cables at least 1 m away from televisions or radios to prevent
interference. Depending on the radio waves, a distance of 1 m may not be
sufficient.
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.

3 | Specific installer safety instructions
Installer and user reference guide
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3 Specific installer safety instructions
Always observe the following safety instructions and regulations.
CAUTION
The cloth inside the left handle is intended to protect the hand from being cut by the
aluminium fins of the unit.
Remove the cloth after the unit is completely mounted.
Installation site (see "17.1Preparing the installation site"[467])
WARNING
Follow the service space dimensions in this manual for correct installation of the unit.
See Service space: Outdoor unit.
WARNING
The appliance shall be stored in a room without continuously operating ignition
sources (example: open flames, an operating gas appliance or an operating electric
heater).
CAUTION
Appliance not accessible to the general public, install it in a secured area, protected
from easy access.
This unit, both indoor and outdoor, is suitable for installation in a commercial and
light industrial environment.
Opening and closing the unit (see "17.2Opening and closing the unit"[471])
DANGER: RISK OF BURNING
DANGER: RISK OF ELECTROCUTION
Mounting the outdoor unit (see "17.3Mounting the outdoor unit"[473])
WARNING
Fixing method of the outdoor unit MUST be in accordance with the instructions from
this manual. See "17.3Mounting the outdoor unit"[473].

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RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
Connecting the refrigerant piping (see "18.2Connecting the refrigerant
piping"[481])
WARNING
Any gas or oil remaining inside the stop valve may blow off the spun piping.
If these instructions are NOT followed correctly it may result in property damage or
personal injury, which may be serious depending on the circumstances.
WARNING
Never remove the spun piping by brazing.
Any gas or oil remaining inside the stop valve may blow off the spun piping.
CAUTION
Do not vent gases into the atmosphere.
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
NEVER install a drier to this unit to guarantee its lifetime. The drying material may
dissolve and damage the system.
Charging refrigerant (see "19Charging refrigerant"[492])
WARNING
The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the
refrigerant leaks in the room and comes in contact with fire from a burner, a heater,
or a cooker, this may result in fire, or the formation of a harmful gas.
Turn off any combustible heating devices, ventilate the room, and contact the dealer
where you purchased the unit.
Do NOT use the unit until a service person confirms that the part from which the
refrigerant leaked has been repaired.
WARNING
Charging of refrigerant MUST be in accordance with the instructions from this
manual. See "19Charging refrigerant"[492].
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.

3 | Specific installer safety instructions
Installer and user reference guide
16
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
Electrical installation (see "20Electrical installation"[4101])
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
Electrical wiring connection method MUST be in accordance with the instructions
from this manual. See "20Electrical installation"[4101].
WARNING
ALWAYS use multicore cable for power supply cables.
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.
CAUTION
Do NOT push or place redundant cable length in the unit.
Commissioning (see "23Commissioning"[4135])
CAUTION
Do NOT perform the test operation while working on the indoor units.
When performing the test operation, NOT only the outdoor unit, but the connected
indoor unit will operate as well. Working on an indoor unit while performing a test
operation is dangerous.
CAUTION
Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT
remove the fan guard. When the fan is rotating at high speed, it will cause injury.

3 | Specific installer safety instructions
Installer and user reference guide
17
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
Troubleshooting (see "26Troubleshooting"[4144])
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.
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.
3.1 Instructions for equipment using R32 refrigerant
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
▪Do NOT pierce or burn.
▪Do NOT use means to accelerate the defrosting process or to clean the
equipment, other than those recommended by the manufacturer.
▪Be aware that R32 refrigerant does NOT contain an odour.
WARNING
The appliance shall be stored so as to prevent mechanical damage and in a well-
ventilated room without continuously operating ignition sources (example: open
flames, an operating gas appliance or an operating electric heater) and have a room
size as specified below.
See "3.1.3 To determine the charge limitations" [4 23] to check if your system
meets the requirement for charge limitation.
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.

3 | Specific installer safety instructions
Installer and user reference guide
18
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
WARNING
If one or more rooms are connected to the unit using a duct system, make sure:
▪there are no operating ignition sources (example: open flames, an operating gas
appliance or an operating electric heater) in case the floor area is less than the
minimum floor area A (m²).
▪no auxiliary devices, which may be a potential ignition source, are installed in the
duct work (example: hot surfaces with a temperature exceeding 700°C and
electric switching device);
▪only auxiliary devices approved by the manufacturer are used in the duct work;
▪air inlet AND outlet are connected directly to the same room by ducting. Do NOT
use spaces such as a false ceiling as a duct for the air inlet or outlet.
See "3.1.3 To determine the charge limitations" [4 23] to check if your system
meets the requirement for charge limitation.
NOTICE
▪Precautions shall be taken to avoid excessive vibration or pulsation to
refrigeration piping.
▪Protection devices, piping and fittings shall be protected as far as possible against
adverse environmental effects.
▪Provision shall be made for expansion and contraction of long runs of piping.
▪Piping in refrigerating systems shall be designed and installed such as to minimise
the likelihood of hydraulic shock damaging the system.
▪The indoor equipment and pipes shall be securely mounted and guarded such
that accidental rupture of equipment or pipes cannot occur from events such as
moving furniture or reconstruction activities.
CAUTION
Do NOT use potential sources of ignition in searching for or detection of refrigerant
leaks.
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.
3.1.1 Installation space requirements
WARNING
If the appliance contains R32 refrigerant, the floor area of the room in which the
appliance is stored shall be at least 98.3m².
NOTICE
▪Pipework shall be protected from physical damage.
▪Installation of pipework shall be kept to a minimum.

3 | Specific installer safety instructions
Installer and user reference guide
19
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
3.1.2 System layout requirements
The VRV 5-S uses R32 refrigerant which is rated as A2L and is mildly flammable.
To comply with the requirements of enhanced tightness refrigerating systems of
the IEC 60335-2-40, this system is equipped with shut-off valves in the outdoor
unit and an alarm in the remote controller. In case the requirements of this manual
are followed, no additional safety measures are needed.
A big range of charge and room area combinations is allowed thanks to the
countermeasures that are implemented in the unit by default.
Follow the installation requirements below to ensure that the complete system is
compliant to legislation.
Outdoor unit installation
The outdoor unit has to be installed outside. For indoor installation of the outdoor
unit, additional measures can be necessary to comply with the applicable
legislation.
A terminal for external output is available in the outdoor unit. This SVS output can
be used when additional countermeasures are needed. The SVS output is a contact
on terminal X2M that closes in case a leak is detected, failure or disconnection of
the R32 sensor (located in the indoor unit).
For more information about the SVS output, see "20.3 To connect the external
outputs"[4110].
Indoor unit installation
For installation of the indoor unit, refer to the installation and operation manual
delivered with the indoor unit. For compatibility of indoor units refer to the latest
version of the technical data book of this unit.
The total amount of refrigerant in the system shall be less than or equal to the
maximum allowed total refrigerant amount. The maximum allowed total
refrigerant amount depends on the area of the rooms being served by the system
and the rooms in the lowest underground floor.
See "3.1.3 To determine the charge limitations" [4 23] to check if your system
meets the requirement for charge limitation.
An optional output PCB for the indoor unit can be added to provide output for
external device. The output PCB will trigger in case a leak is detected, the R32
sensor fails or when the sensor is disconnected. For exact model name see option
list of the indoor unit. For more information about this option, refer to the
installation manual of the optional output PCB.
Piping requirements
Piping must be installed according to instructions given in "18 Piping
installation"[477]. Only mechanical joints (e.g. braze+flare connections) that are
compliant with the latest version of ISO14903 can be used.
For piping installed in the occupied space, please make sure that the piping is
protected against accidental damage. Piping should be checked according to
procedure as mentioned in "18.3Checking the refrigerant piping"[488].

3 | Specific installer safety instructions
Installer and user reference guide
20
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
Remote controller requirements
b
a
c
d
f
h
e
d
c
b b
c
d
g
h h
aHeat pump outdoor unit
bRefrigerant piping
cVRV direct expansion (DX) indoor unit
dRemote controller in normal mode
eRemote controller in alarm only mode
fRemote controller in supervisor mode (mandatory in some situations)
giTM (optional)
hOption PCB (optional)
For installation of the remote controller, please refer to the installation and
operation manual delivered with the remote controller. Each indoor unit has to be
connected with a R32 safety system compatible remote controller (e.g.
BRC1H52/82* or later type). These remote controllers have implemented safety
measures that will warn the user visually and audibly in case of a leak.
For installation of the remote controller it is mandatory to follow the requirements.
1Only a safety system compatible remote controller can be used. See technical
data sheet for remote controller compatibility (e.g. BRC1H52/82*).
2Each indoor unit has to be connected to a separate remote controller.
3Even if multiple indoors are in the same room, they should all have a separate
remote controller.
4The remote controller put in the same room as the indoor unit has to be in
fully functional mode or alarm only mode. For details about the different
remote controller modes and how to set up, please check the note below or
refer to the installation and operation manual delivered with the remote
controller.
5Group control is not allowed.
6For buildings where sleeping facilities are offered (e.g. hotel), where persons
are restricted in their movements (e.g. hospitals), an uncontrolled number of
persons is present or buildings where people are not aware of the safety
precautions it is mandatory to install one of the following devices at a location
with 24-hour monitoring:
▪a supervisor remote controller
▪or an iTM with external alarm via WAGO module.
Note: The remote controller will generate a visible and audible warning. E.g. the
BRC1H52/82* remote controllers can generate an alarm of 65dB (sound pressure,
measured at 1m distance of the alarm). Sound data is available in the technical
data sheet of the remote controller. The alarm should always be 15dB louder than
the background noise of the room. In case of higher background noise in a certain
room, we recommend to use an external alarm (field supply) in that room. This
alarm can be connected to the SVS output channel of the outdoor unit or to the
optional output PCB of the indoor unit of that specific room.
For more information on the SVS output signal, see "20.2To connect the electrical
wiring to the outdoor unit"[4107].