Daikin RXYSQ4T8VB(*), RXYSQ5T8VB(*), RXYSQ6T8VB(*), RXYSQ4T8YB(*), RXYSQ5T8YB(*) Installer reference guide
...
Installer and user reference guide
VRV IV-S system air conditioner
RXYSQ4T8VB(*)
RXYSQ5T8VB(*)
RXYSQ6T8VB(*)
RXYSQ4T8YB(*)
RXYSQ5T8YB(*)
RXYSQ6T8YB(*)
Table of contents
Table of contents
1 About the documentation 6
1.1 About this document ...................................................................................................................................................... 6
1.2 Meaning of warnings and symbols................................................................................................................................. 6
2 General safety precautions 8
2.1 For the installer............................................................................................................................................................... 8
2.1.1 General ........................................................................................................................................................... 8
2.1.2 Installation site ............................................................................................................................................... 9
2.1.3 Refrigerant — in case of R410A or R32.......................................................................................................... 9
2.1.4 Electrical ......................................................................................................................................................... 11
3 Specific installer safety instructions 14
For the user 17
4 User safety instructions 18
4.1 General............................................................................................................................................................................ 18
4.2 Instructions for safe operation ....................................................................................................................................... 19
5 About the system 22
5.1 System layout.................................................................................................................................................................. 22
6 User interface 24
7 Before operation 25
8 Operation 26
8.1 Operation range.............................................................................................................................................................. 26
8.2 Operating the system ..................................................................................................................................................... 26
8.2.1 About operating the system........................................................................................................................... 26
8.2.2 About cooling, heating, fan only, and automatic operation ......................................................................... 27
8.2.3 About the heating operation.......................................................................................................................... 27
8.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch)...................................... 27
8.2.5 To operate the system (WITH cool/heat changeover remote control switch) ............................................. 28
8.3 Using the dry program.................................................................................................................................................... 29
8.3.1 About the dry program................................................................................................................................... 29
8.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch) .................................... 29
8.3.3 To use the dry program (WITH cool/heat changeover remote control switch) ........................................... 29
8.4 Adjusting the air flow direction ...................................................................................................................................... 30
8.4.1 About the air flow flap.................................................................................................................................... 30
8.5 Setting the master user interface................................................................................................................................... 31
8.5.1 About setting the master user interface........................................................................................................ 31
8.5.2 To designate the master user interface ......................................................................................................... 31
9 Energy saving and optimum operation 32
9.1 Available main operation methods ................................................................................................................................ 32
9.2 Available comfort settings .............................................................................................................................................. 33
10 Maintenance and service 34
10.1 Maintenance after a long stop period............................................................................................................................ 34
10.2 Maintenance before a long stop period......................................................................................................................... 35
10.3 About the refrigerant...................................................................................................................................................... 35
10.4 After-sales service and warranty .................................................................................................................................... 35
10.4.1 Warranty period............................................................................................................................................. 35
10.4.2 Recommended maintenance and inspection................................................................................................ 36
10.4.3 Recommended maintenance and inspection cycles ..................................................................................... 36
10.4.4 Shortened maintenance and replacement cycles......................................................................................... 37
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11 Troubleshooting 38
11.1 Error codes: Overview .................................................................................................................................................... 39
11.2 Symptoms that are NOT system malfunctions............................................................................................................... 41
11.2.1 Symptom: The system does not operate....................................................................................................... 41
11.2.2 Symptom: Cool/Heat cannot be changed over ............................................................................................. 42
11.2.3 Symptom: Fan operation is possible, but cooling and heating do not work ................................................ 42
11.2.4 Symptom: The fan speed does not correspond to the setting...................................................................... 42
11.2.5 Symptom: The fan direction does not correspond to the setting................................................................. 42
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
Table of contents
11.2.6 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 42
11.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 42
11.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 43
11.2.9 Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 43
11.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 43
11.2.11 Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 43
11.2.12 Symptom: Dust comes out of the unit........................................................................................................... 43
11.2.13 Symptom: The units can give off odours ....................................................................................................... 43
11.2.14 Symptom: The outdoor unit fan does not spin.............................................................................................. 43
11.2.15 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 44
11.2.16 Symptom: The inside of an outdoor unit is warm even when the unit has stopped.................................... 44
11.2.17 Symptom: Hot air can be felt when the indoor unit is stopped.................................................................... 44
12 Relocation 45
13 Disposal 46
14 Technical data 47
14.1 Information requirements for Eco Design...................................................................................................................... 47
For the installer 48
15 About the box 49
15.1 About LOOP BY DAIKIN ................................................................................................................................................... 49
15.2 Overview: About the box ................................................................................................................................................ 49
15.3 Outdoor unit ................................................................................................................................................................... 50
15.3.1 To unpack the outdoor unit ........................................................................................................................... 50
15.3.2 To handle the outdoor unit............................................................................................................................ 50
15.3.3 To remove the accessories from the outdoor unit........................................................................................ 51
16 About the units and options 52
16.1 Overview: About the units and options.......................................................................................................................... 52
16.2 Identification ................................................................................................................................................................... 52
16.2.1 Identification label: Outdoor unit .................................................................................................................. 52
16.3 About the outdoor unit................................................................................................................................................... 53
16.4 System layout .................................................................................................................................................................. 53
16.5 Combining units and options .......................................................................................................................................... 54
16.5.1 About combining units and options............................................................................................................... 54
16.5.2 Possible combinations of indoor units........................................................................................................... 54
16.5.3 Possible options for the outdoor unit............................................................................................................ 54
17 Unit installation 56
17.1 Preparing the installation site......................................................................................................................................... 56
17.1.1 Installation site requirements of the outdoor unit........................................................................................ 56
17.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 59
17.1.3 Securing safety against refrigerant leaks....................................................................................................... 60
17.2 Opening and closing the unit .......................................................................................................................................... 61
17.2.1 About opening the units................................................................................................................................. 61
17.2.2 To open the outdoor unit............................................................................................................................... 62
17.2.3 To close the outdoor unit............................................................................................................................... 62
17.3 Mounting the outdoor unit............................................................................................................................................. 63
17.3.1 About mounting the outdoor unit ................................................................................................................. 63
17.3.2 Precautions when mounting the outdoor unit.............................................................................................. 63
17.3.3 To provide the installation structure ............................................................................................................. 63
17.3.4 To install the outdoor unit ............................................................................................................................. 64
17.3.5 To provide drainage........................................................................................................................................ 64
17.3.6 To prevent the outdoor unit from falling over .............................................................................................. 65
18 Piping installation 66
18.1 Preparing refrigerant piping ........................................................................................................................................... 66
18.1.1 Refrigerant piping requirements.................................................................................................................... 66
18.1.2 Refrigerant piping material ............................................................................................................................ 67
18.1.3 To select the piping size ................................................................................................................................. 67
18.1.4 To select refrigerant branch kits.................................................................................................................... 69
18.1.5 Refrigerant piping length and height difference ........................................................................................... 70
18.2 Connecting the refrigerant piping .................................................................................................................................. 71
18.2.1 About connecting the refrigerant piping....................................................................................................... 71
18.2.2 Precautions when connecting the refrigerant piping.................................................................................... 72
18.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 72
18.2.4 Pipe bending guidelines ................................................................................................................................. 73
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18.2.5 To flare the pipe end...................................................................................................................................... 73
18.2.6 To braze the pipe end..................................................................................................................................... 74
18.2.7 Using the stop valve and service port............................................................................................................ 75
18.2.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 76
18.2.9 To connect the refrigerant branching kit....................................................................................................... 78
18.3 Checking the refrigerant piping ...................................................................................................................................... 79
18.3.1 About checking the refrigerant piping........................................................................................................... 79
18.3.2 Checking refrigerant piping: General guidelines ........................................................................................... 80
18.3.3 Checking refrigerant piping: Setup ................................................................................................................ 81
18.3.4 To perform a leak test.................................................................................................................................... 81
18.3.5 To perform vacuum drying............................................................................................................................. 82
18.3.6 To insulate the refrigerant piping .................................................................................................................. 82
18.4 Charging refrigerant........................................................................................................................................................ 83
18.4.1 About charging refrigerant............................................................................................................................. 83
18.4.2 Precautions when charging refrigerant ......................................................................................................... 83
18.4.3 To determine the additional refrigerant amount.......................................................................................... 84
18.4.4 To charge refrigerant...................................................................................................................................... 85
18.4.5 Error codes when charging refrigerant.......................................................................................................... 87
18.4.6 To fix the fluorinated greenhouse gases label............................................................................................... 87
19 Electrical installation 89
19.1 About connecting the electrical wiring .......................................................................................................................... 89
19.1.1 Precautions when connecting the electrical wiring....................................................................................... 89
19.1.2 Field wiring: Overview.................................................................................................................................... 91
19.1.3 Guidelines when knocking out knockout holes............................................................................................. 92
19.1.4 Guidelines when connecting the electrical wiring......................................................................................... 92
19.1.5 About electrical compliance........................................................................................................................... 93
19.1.6 Safety device requirements ........................................................................................................................... 93
19.2 To connect the electrical wiring to the outdoor unit..................................................................................................... 94
19.3 To finish the transmission wiring.................................................................................................................................... 97
19.4 To check the insulation resistance of the compressor .................................................................................................. 98
20 Configuration 99
20.1 Overview: Configuration ................................................................................................................................................. 99
20.2 Making field settings ....................................................................................................................................................... 99
20.2.1 About making field settings............................................................................................................................ 99
20.2.2 To access the field setting components......................................................................................................... 100
20.2.3 Field setting components............................................................................................................................... 100
20.2.4 To access mode 1 or 2.................................................................................................................................... 101
20.2.5 To use mode 1................................................................................................................................................ 102
20.2.6 To use mode 2................................................................................................................................................ 103
20.2.7 Mode 1: Monitoring settings ......................................................................................................................... 104
20.2.8 Mode 2: Field settings.................................................................................................................................... 104
20.2.9 To connect the PC configurator to the outdoor unit..................................................................................... 107
20.3 Energy saving and optimum operation .......................................................................................................................... 108
20.3.1 Available main operation methods................................................................................................................ 108
20.3.2 Available comfort settings.............................................................................................................................. 109
20.3.3 Example: Automatic mode during cooling..................................................................................................... 111
20.3.4 Example: Automatic mode during heating.................................................................................................... 112
21 Commissioning 114
21.1 Precautions when commissioning .................................................................................................................................. 114
21.2 Checklist before commissioning ..................................................................................................................................... 114
21.3 Checklist during commissioning ..................................................................................................................................... 116
21.4 About the test run........................................................................................................................................................... 116
21.5 To perform a test run (7-segment display) .................................................................................................................... 116
21.6 Correcting after abnormal completion of the test run .................................................................................................. 116
21.7 Operating the unit........................................................................................................................................................... 117
22 Hand-over to the user 118
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23 Maintenance and service 119
23.1 Maintenance safety precautions .................................................................................................................................... 119
23.1.1 To prevent electrical hazards......................................................................................................................... 119
23.2 Checklist for yearly maintenance of the outdoor unit ................................................................................................... 120
23.3 About service mode operation ....................................................................................................................................... 120
23.3.1 To use vacuum mode ..................................................................................................................................... 121
23.3.2 To recover refrigerant.................................................................................................................................... 121
24 Troubleshooting 122
24.1 Overview: Troubleshooting ............................................................................................................................................ 122
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4P482277-1B – 2020.10
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24.2 Precautions when troubleshooting ................................................................................................................................ 122
24.3 Solving problems based on error codes ......................................................................................................................... 122
24.3.1 Error codes: Overview.................................................................................................................................... 123
25 Disposal 125
26 Technical data 126
26.1 Service space: Outdoor unit ........................................................................................................................................... 127
26.2 Piping diagram: Outdoor unit ......................................................................................................................................... 129
26.3 Wiring diagram: Outdoor unit ........................................................................................................................................ 130
27 Glossary 134
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1 | About the documentation
1 About the documentation
In this chapter
1.1 About this document.............................................................................................................................................................. 6
1.2 Meaning of warnings and symbols......................................................................................................................................... 6
1.1 About this document
Target audience
Authorised installers + end users
Documentation set
This document is part of a documentation set. The complete set consists of:
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.
▪ 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).
1.2 Meaning of warnings and symbols
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▪ The full set of latest technical data is available on the Daikin Business Portal
(authentication required).
DANGER
Indicates a situation that results in death or serious injury.
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
1 | About the documentation
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING/SCALDING
Indicates a situation that could result in burning/scalding because of extreme hot or
cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate injury.
NOTICE
Indicates a situation that could result in equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
Symbols used on the unit:
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
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
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".
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2 | General safety precautions
2 General safety precautions
In this chapter
2.1 For the installer....................................................................................................................................................................... 8
2.1 For the installer
2.1.1 General
If you are NOT sure how to install or operate the unit, contact your dealer.
2.1.1 General ................................................................................................................................................................... 8
2.1.2 Installation site ....................................................................................................................................................... 9
2.1.3 Refrigerant — in case of R410A or R32 ................................................................................................................. 9
2.1.4 Electrical ................................................................................................................................................................. 11
DANGER: RISK OF BURNING/SCALDING
▪ Do NOT touch the refrigerant piping, water piping or internal parts during and
immediately after operation. It could be too hot or too cold. Give it time to return
to normal temperature. If you must touch it, wear protective gloves.
▪ Do NOT touch any accidental leaking refrigerant.
WARNING
Improper installation or attachment of equipment or accessories could result in
electrical shock, short-circuit, leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or approved by Daikin.
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.
WARNING
Provide adequate measures to prevent that the unit can be used as a shelter by small
animals. Small animals that make contact with electrical parts can cause
malfunctions, smoke or fire.
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CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
2 | General safety precautions
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.
2.1.2 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.
2.1.3 Refrigerant — in case of R410A or R32
If applicable. See the installation manual or installer reference guide of your
application for more information.
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
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.
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2 | General safety precautions
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 might be produced if refrigerant gas comes into contact with fire.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump down the system, and there
is a leak in the refrigerant circuit:
▪ Do NOT use the unit's automatic pump down function, with which you can collect
all refrigerant from the system into the outdoor unit. Possible consequence: Selfcombustion 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.
▪ In case recharge is required, see the nameplate of the unit. It states the type of
refrigerant and necessary amount.
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▪ 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:
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
2 | General safety precautions
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.
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.
2.1.4 Electrical
DANGER: RISK OF ELECTROCUTION
▪ Turn OFF all power supply before removing the switch box cover, connecting
electrical wiring or touching electrical parts.
▪ Disconnect the power supply for more than 10minutes, and measure the voltage
at the terminals of main circuit capacitors or electrical components before
servicing. The voltage MUST be less than 50VDC 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
categoryIII condition, MUST be installed in the fixed wiring.
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
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2 | General safety precautions
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.
CAUTION
▪ When connecting the power supply: connect the earth cable first, before making
the current-carrying connections.
▪ When disconnecting the power supply: disconnect the current-carrying cables
first, before separating the earth connection.
▪ The length of the conductors between the power supply stress relief and the
terminal block itself must be as such that the current-carrying wires are tautened
before the earth wire is in case the power supply is pulled loose from the stress
relief.
NOTICE
Precautions when laying power wiring:
▪ Do NOT connect wiring of different thicknesses to the power terminal block (slack
in the power wiring may cause abnormal heat).
▪ When connecting wiring which is the same thickness, do as shown in the figure
above.
▪ For wiring, use the designated power wire and connect firmly, then secure to
prevent outside pressure being exerted on the terminal board.
▪ Use an appropriate screwdriver for tightening the terminal screws. A screwdriver
with a small head will damage the head and make proper tightening impossible.
▪ Over-tightening the terminal screws may break them.
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Install power cables at least 1 m away from televisions or radios to prevent
interference. Depending on the radio waves, a distance of 1 m may not be
sufficient.
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
2 | General safety precautions
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.
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
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3 | Specific installer safety instructions
3 Specific installer safety instructions
Always observe the following safety instructions and regulations.
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially
children, can play with them. Possible risk: suffocation.
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.
CAUTION
Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency.
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover is removed.
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
WARNING
Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks,
ventilate the area immediately. Possible risks:
▪ Excessive refrigerant concentrations in a closed room can lead to oxygen
deficiency.
▪ Toxic gas might be produced if refrigerant gas comes into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
WARNING
During tests, NEVER pressurize the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
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CAUTION
Do not vent gases into the atmosphere.
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.
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4P482277-1B – 2020.10
3 | Specific installer safety instructions
WARNING
NEVER remove the spun piping by brazing.
Any gas or oil remaining inside the stop valve may blow off the spun piping.
WARNING
▪ ONLY use R410A as refrigerant. Other substances may cause explosions and
accidents.
▪ R410A contains fluorinated greenhouse gases. Its global warming potential (GWP)
value is 2087.5. Do NOT vent these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.
CAUTION
Do NOT push or place redundant cable length in the unit.
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.
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
WARNING
ALWAYS use multicore cable for power supply cables.
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15
3 | Specific installer safety instructions
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.
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.
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VRV IV-S system air conditioner
RXYSQ4~6T8V/YB
4P482277-1B – 2020.10
For the user
For the user
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
Installer and user reference guide
17
4 | User safety instructions
4 User safety instructions
Always observe the following safety instructions and regulations.
In this chapter
4.1 General.................................................................................................................................................................................... 18
4.2 Instructions for safe operation............................................................................................................................................... 19
4.1 General
WARNING
If you are NOT sure how to operate the unit, contact your
installer.
WARNING
Children aged from 8 years and above and persons with
reduced physical, sensory or mental capabilities or lack of
experience and knowledge can only use this appliance if
they have been given supervision or instruction concerning
the use of the appliance by a person responsible for their
safety.
Children MUST NOT play with the appliance.
Cleaning and user maintenance MUST NOT be carried out
by children without supervision.
WARNING
To prevent electrical shocks or fire:
▪ Do NOT rinse the unit.
▪ Do NOT operate the unit with wet hands.
▪ Do NOT place any objects containing water on the unit.
CAUTION
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
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VRV IV-S system air conditioner
RXYSQ4~6T8V/YB
4P482277-1B – 2020.10
4 | User safety instructions
▪ Units are marked with the following symbol:
This means that electrical and electronic products may NOT be mixed with
unsorted household waste. Do NOT try to dismantle the system yourself: the
dismantling of the system, treatment of the refrigerant, of oil and of other parts
must be done by an authorized installer and must comply with applicable
legislation.
Units must be treated at a specialized treatment facility for reuse, recycling and
recovery. By ensuring this product is disposed of correctly, you will help to
prevent potential negative consequences for the environment and human
health. For more information, contact your installer or local authority.
▪ Batteries are marked with the following symbol:
This means that the batteries may NOT be mixed with unsorted household
waste. If a chemical symbol is printed beneath the symbol, this chemical symbol
means that the battery contains a heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries must be treated at a specialized treatment facility for reuse. By
ensuring waste batteries are disposed of correctly, you will help to prevent
potential negative consequences for the environment and human health.
4.2 Instructions for safe operation
CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are
dangerous to touch and appliance problems may
happen. For checking and adjusting the internal parts,
contact your dealer.
CAUTION
Do NOT operate the system when using a room
fumigation-type insecticide. Chemicals could collect in the
unit, and endanger the health of people who are
hypersensitive to chemicals.
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
CAUTION
It is unhealthy to expose your body to the air flow for a
long time.
Installer and user reference guide
19
4 | User safety instructions
CAUTION
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
WARNING
Never touch the air outlet or the horizontal blades while
the swing flap is in operation. Fingers may become caught
or the unit may break down.
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.
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while the fan is running.
Be sure to turn off the main switch before executing any
maintenance task.
CAUTION
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
WARNING
NEVER replace a fuse with a fuse of a wrong ampere
ratings or other wires when a fuse blows out. Use of wire
or copper wire may cause the unit to break down or cause
a fire.
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VRV IV-S system air conditioner
RXYSQ4~6T8V/YB
4P482277-1B – 2020.10
4 | User safety instructions
WARNING
▪ Do NOT modify, disassemble, remove, reinstall or repair
the unit yourself as incorrect dismantling or installation
may cause an electric shock or fire. Contact your dealer.
▪ In case of accidental refrigerant leaks, make sure there
are no naked flames. The refrigerant itself is entirely
safe, non-toxic and non-combustible, but it will generate
toxic gas when it accidentally leaks into a room where
combustible air from fan heaters, gas cookers, etc. is
present. Always have qualified service personnel
confirm that the point of leakage has been repaired or
corrected before resuming operation.
WARNING
Stop operation and shut off the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electric shock or fire. Contact your dealer.
WARNING
The refrigerant in the system is safe and normally does not
leak. If the refrigerant leaks in the room, contact with a fire
of a burner, a heater or a cooker may result in a harmful
gas.
Turn off any combustible heating devices, ventilate the
room and contact the dealer where you purchased the
unit.
Do not use the system until a service person confirms that
the portion where the refrigerant leaks is repaired.
CAUTION
NEVER expose little children, plants or animals directly to
the airflow.
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
Installer and user reference guide
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5 | About the system
g
d d
c c
f
e
b
a
g
f
e
5 About the system
The indoor unit part of this VRV heat pump system can be used for heating/cooling
applications. The type of indoor unit which can be used depends on the outdoor
units series.
NOTICE
Do NOT use the system for other purposes. In order to avoid any quality
deterioration, do NOT use the unit for cooling precision instruments, food, plants,
animals, or works of art.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future system extensions) is available
in technical engineering data and should be consulted. Contact your installer to
receive more information and professional advice.
INFORMATION
▪ Combination of VRVDX and RADX indoor units is not allowed.
▪ Combination of RADX and AHU indoor units is not allowed.
▪ Combination of RADX and aircurtain indoor units is not allowed.
In general following type of indoor units can be connected to a VRV heat pump
system (not exhaustive list, depending on outdoor unit model and indoor unit
model combinations):
▪ VRV direct expansion indoor units (air to air applications).
▪ RA direct expansion indoor units (air to air applications).
▪ AHU (air to air applications): EKEXV-kit is required.
▪ Aircurtain -Biddle- (air to air applications).
Airhandling unit connection in pair to VRV heat pump outdoor unit is supported.
Airhandling unit connection in multi to VRV heat pump outdoor unit is supported,
even combined with VRV direct expansion indoor unit(s).
For more specifications, see technical engineering data.
In this chapter
5.1 System layout.......................................................................................................................................................................... 22
5.1 System layout
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a VRV IV-S Heat pump outdoor unit
b Refrigerant piping
c VRV direct expansion (DX) indoor unit
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
5 | About the system
d User interface (dedicated depending on indoor unit type)
e BP box (required to connect Residential Air (RA) or Sky Air (SA) direct expansion
(DX) indoor units)
f Residential Air (RA) direct expansion (DX) indoor units
g User interface (wireless, dedicated depending on indoor unit type)
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6 | User interface
6 User interface
CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are dangerous to touch and
appliance problems may happen. For checking and adjusting the internal parts,
contact your dealer.
This operation manual offers a non-exhaustive overview of the main functions of
the system.
Detailed information on required actions to achieve certain functions can be found
in the dedicated installation and operation manual of the indoor unit.
Refer to the operation manual of the installed user interface.
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VRV IV-S system air conditioner
RXYSQ4~6T8V/YB
4P482277-1B – 2020.10
7 Before operation
WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been carried out correctly by
an installer.
NOTICE
NEVER inspect or service the unit by yourself. Ask a qualified service person to
perform this work.
CAUTION
It is unhealthy to expose your body to the air flow for a long time.
CAUTION
To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner
is used together with the system.
7 | Before operation
CAUTION
Do NOT operate the system when using a room fumigation-type insecticide.
Chemicals could collect in the unit, and endanger the health of people who are
hypersensitive to chemicals.
NOTICE
Be sure to turn ON the power 6 hours before operation in order to have power
running to the crankcase heater and to protect the compressor.
This operation manual is for the following systems with standard control. Before
initiating operation, contact your dealer for the operation that corresponds to your
system type and mark. If your installation has a customised control system, ask
your dealer for the operation that corresponds to your system.
Operation modes (depending on indoor unit type):
▪ Heating and cooling (air to air).
▪ Fan only operation (air to air).
Dedicated functions exist depending on the type of indoor unit, refer to dedicated
installation/operation manual for more information.
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
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8 | Operation
8 Operation
8.1 Operation range
In this chapter
8.1 Operation range...................................................................................................................................................................... 26
8.2 Operating the system ............................................................................................................................................................. 26
8.2.1 About operating the system .................................................................................................................................. 26
8.2.2 About cooling, heating, fan only, and automatic operation ................................................................................. 27
8.2.3 About the heating operation ................................................................................................................................. 27
8.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch) ............................................. 27
8.2.5 To operate the system (WITH cool/heat changeover remote control switch)..................................................... 28
8.3 Using the dry program............................................................................................................................................................ 29
8.3.1 About the dry program .......................................................................................................................................... 29
8.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch)............................................ 29
8.3.3 To use the dry program (WITH cool/heat changeover remote control switch) ................................................... 29
8.4 Adjusting the air flow direction.............................................................................................................................................. 30
8.4.1 About the air flow flap ........................................................................................................................................... 30
8.5 Setting the master user interface .......................................................................................................................................... 31
8.5.1 About setting the master user interface ............................................................................................................... 31
8.5.2 To designate the master user interface................................................................................................................. 31
Use the system in the following temperature and humidity ranges for safe and
effective operation.
Outdoor temperature –5~46°CDB –20~21°CDB
Indoor temperature 21~32°CDB
Indoor humidity ≤80%
(a)
To avoid condensation and water dripping out of the unit. If the temperature or the
humidity is beyond these conditions, safety devices may be put in action and the air
conditioner may not operate.
Above operation range is only valid in case direct expansion indoor units are
connected to the VRV system.
Special operation ranges are valid in case of using AHU. They can be found in the
installation/operation manual of the dedicated unit. Latest information can be
found in the technical engineering data.
8.2 Operating the system
Cooling Heating
–20~15.5°CWB
15~27°CDB
14~25°CWB
(a)
8.2.1 About operating the system
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▪ Operation procedure varies according to the combination of outdoor unit and
user interface.
▪ To protect the unit, turn on the main power switch 6 hours before operation.
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
8.2.2 About cooling, heating, fan only, and automatic operation
▪ Changeover cannot be made with a user interface whose display shows
"change-over under centralised control" (refer to installation and operation
manual of the user interface).
▪ When the display "change-over under centralised control" flashes, refer to
"About setting the master user interface"[431].
▪ The fan may keep on running for about 1 minute after the heating operation
stops.
▪ The air flow rate may adjust itself depending on the room temperature or the fan
may stop immediately. This is not a malfunction.
8.2.3 About the heating operation
It may take longer to reach the set temperature for general heating operation than
for cooling operation.
The following operation is performed in order to prevent the heating capacity from
dropping or cold air from blowing.
Defrost operation
8 | Operation
In heating operation, freezing of the outdoor unit's air cooled coil increases over
time, restricting the energy transfer to the outdoor unit's coil. Heating capability
decreases and the system needs to go into defrost operation to be able to remove
frost from the outdoor unit’s coil. During defrost operation the heating capacity on
the indoor unit side will temporarily drop until defrosting is completed. After
defrosting, the unit will regain its full heating capacity.
The indoor unit will stop fan operation, the refrigerant cycle will reverse and
energy from inside the building will be used to defrost the outdoor unit coil.
The indoor unit will indicate defrost operation on the display .
Hot start
In order to prevent cold air from blowing out of an indoor unit at the start of
heating operation, the indoor fan is automatically stopped. The display of the user
interface shows . It may take some time before the fan starts. This is not a
malfunction.
INFORMATION
▪ The heating capacity drops when the outside temperature falls. If this happens,
use another heating device together with the unit. (When using together with
appliances that produce open fire, ventilate the room constantly). Do not place
appliances that produce open fire in places exposed to the air flow from the unit
or under the unit.
▪ It takes some time to heat up the room from the time the unit is started since the
unit uses a hot-air circulating system to heat the entire room.
▪ If the hot air rises to the ceiling, leaving the area above the floor cold, we
recommend that you use the circulator (the indoor fan for circulating air).
Contact your dealer for details.
8.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch)
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VRV IV-S system air conditioner
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1 Press the operation mode selector button on the user interface several times
and select the operation mode of your choice.
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8 | Operation
a
b
1
1
1
1
1
8.2.5 To operate the system (WITH cool/heat changeover remote control switch)
Cooling operation
Heating operation
Fan only operation
2 Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts operating.
Overview of the changeover remote control switch
a FAN ONLY/AIR CONDITIONING SELECTOR
SWITCH
Set the switch to for fan only operation or to
for heating or cooling operation.
b COOL/HEAT CHANGEOVER SWITCH
Set the switch to for cooling or to for
heating
Note: In case a cool/heat changeover remote control switch is used, the position of
DIP switch 1 (DS1-1) on the main PCB needs to be switched to the ON position.
To start
1 Select operation mode with the cool/heat changeover switch as follows:
Cooling operation
Heating operation
Fan only operation
2 Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts operating.
Installer and user reference guide
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To stop
3 Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops operating.
NOTICE
Do not turn off power immediately after the unit stops, but wait for at least 5
minutes.
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
8 | Operation
1
1
To adjust
For programming temperature, fan speed and air flow direction refer to the
operation manual of the user interface.
8.3 Using the dry program
8.3.1 About the dry program
▪ The function of this program is to decrease the humidity in your room with
minimal temperature decrease (minimal room cooling).
▪ The micro computer automatically determines temperature and fan speed
(cannot be set by the user interface).
▪ The system does not go into operation if the room temperature is low (<20°C).
8.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch)
To start
1 Press the operation mode selector button on the user interface several times
and select (program dry operation).
2 Press the ON/OFF button of the user interface.
Result: The operation lamp lights up and the system starts operating.
3 Press the air flow direction adjust button (only for double-flow, multi-flow,
corner, ceiling-suspended and wall-mounted). Refer to "8.4 Adjusting the air
flow direction"[430] for details.
To stop
4 Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops operating.
NOTICE
Do not turn off power immediately after the unit stops, but wait for at least 5
minutes.
8.3.3 To use the dry program (WITH cool/heat changeover remote control switch)
To start
1 Select cooling operation mode with the cool/heat changeover remote control
switch.
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VRV IV-S system air conditioner
4P482277-1B – 2020.10
2 Press the operation mode selector button on the user interface several times
and select (program dry operation).
Installer and user reference guide
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8 | Operation
8.4 Adjusting the air flow direction
3 Press the ON/OFF button of the user interface.
Result: The operation lamp lights up and the system starts operating.
4 Press the air flow direction adjust button (only for double-flow, multi-flow,
corner, ceiling-suspended and wall-mounted). Refer to "8.4 Adjusting the air
flow direction"[430] for details.
To stop
5 Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops operating.
NOTICE
Do not turn off power immediately after the unit stops, but wait for at least 5
minutes.
Refer to the operation manual of the user interface.
8.4.1 About the air flow flap
For the following conditions, a micro computer controls the air flow direction
which may be different from the display.
▪ When the room temperature is lower
than the set temperature.
▪ When operating continuously at horizontal air flow direction.
▪ When continuous operation with downward air flow is performed at the time of
cooling with a ceiling-suspended or a wall-mounted unit, the micro computer
may control the flow direction, and then the user interface indication will also
change.
Double flow+multi-flow units
Corner units
Ceiling suspended units
Wall-mounted units
Cooling Heating
▪ When starting operation.
▪ When the room temperature is higher
than the set temperature.
▪ At defrost operation.
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The air flow direction can be adjusted in one of the following ways:
▪ The air flow flap itself adjusts its position.
▪ The air flow direction can be fixed by the user.
▪ Automatic and desired position .
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
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