Installer and user
reference guide
VRV IV-S system air conditioner
RXYSQ4TAY1B RXYSQ5TAY1B RXYSQ6TAY1B
Installer and user reference guide
VRV IV-S system air conditioner
English
Table of Contents
Table of Contents
1 General safety precautions
1.1
1.2
1.3
About the documentation ..........................................................
1.1.1
Meaning of warnings and symbols..............................
For the user ...............................................................................
For the installer..........................................................................
1.3.1
General .......................................................................
1.3.2
Installation site ............................................................
1.3.3
Refrigerant ..................................................................
1.3.4
Brine............................................................................
1.3.5
Water ..........................................................................
1.3.6
Electrical .....................................................................
2 About the documentation
2.1
About this document..................................................................
3
3
3
4
4
4
4
5
5
6
6
6
7
3 About the box
7
Overview: About the box ...........................................................
Outdoor unit...............................................................................
3.2.1
To unpack the outdoor unit .........................................
3.2.2
To handle the outdoor unit ..........................................
3.2.3
To remove the accessories from the outdoor unit.......
6.6
6.7
6
For the installer
3.1
3.2
6.5
6.8
7
7
7
7
7
6.9
4 About the units and options
4.1
4.2
4.3
4.4
4.5
Overview: About the units and options......................................
Identification ..............................................................................
4.2.1
Identification label: Outdoor unit .................................
About the outdoor unit ...............................................................
System layout............................................................................
Combining units and options .....................................................
4.5.1
About combining units and options .............................
4.5.2
Possible combinations of indoor units.........................
4.5.3
Possible options for the outdoor unit...........................
5 Preparation
5.1
5.2
5.3
5.4
Overview: Preparation...............................................................
Preparing installation site ..........................................................
5.2.1
Installation site requirements of the outdoor unit ........
5.2.2
Additional installation site requirements of the
outdoor unit in cold climates .......................................
5.2.3
Securing safety against refrigerant leaks....................
Preparing refrigerant piping.......................................................
5.3.1
Refrigerant piping requirements..................................
5.3.2
Refrigerant piping material..........................................
5.3.3
To select the piping size .............................................
5.3.4
To select refrigerant branch kits..................................
5.3.5
Refrigerant piping length and height difference ..........
Preparing electrical wiring .........................................................
5.4.1
About electrical compliance ........................................
5.4.2
Safety device requirements ........................................
6 Installation
6.1
6.2
6.3
6.4
Overview: Installation ................................................................
Opening the units ......................................................................
6.2.1
About opening the units ..............................................
6.2.2
To open the outdoor unit.............................................
Mounting the outdoor unit..........................................................
6.3.1
About mounting the outdoor unit.................................
6.3.2
Precautions when mounting the outdoor unit..............
6.3.3
To provide the installation structure ............................
6.3.4
To install the outdoor unit............................................
6.3.5
To provide drainage ....................................................
6.3.6
To prevent the outdoor unit from falling over ..............
Connecting the refrigerant piping ..............................................
Installer and user reference guide
2
8
8
8
8
8
8
8
8
9
9
7 Configuration
7.1
7.2
9
9
9
9
10
11
12
12
12
12
13
13
14
14
15
7.3
8.1
8.2
8.3
8.4
17
17
17
17
17
18
19
20
20
20
21
21
21
21
21
22
22
22
22
23
24
24
24
24
25
25
25
26
27
27
27
27
Overview: Configuration .............................................................
Making field settings...................................................................
7.2.1
About making field settings ..........................................
7.2.2
To access the field setting components.......................
7.2.3
Field setting components .............................................
7.2.4
To access mode 1 or 2 ................................................
7.2.5
To use mode 1 .............................................................
7.2.6
To use mode 2 .............................................................
7.2.7
Mode 1 (and default situation): Monitoring settings .....
7.2.8
Mode 2: Field settings..................................................
Energy saving and optimum operation.......................................
7.3.1
Available main operation methods...............................
7.3.2
Available comfort settings ............................................
7.3.3
Example: Automatic mode during cooling....................
7.3.4
Example: Automatic mode during heating ...................
8 Commissioning
15
15
15
15
15
15
15
15
16
16
16
16
17
6.4.1
About connecting the refrigerant piping .......................
6.4.2
Precautions when connecting the refrigerant piping ....
6.4.3
Pipe bending guidelines...............................................
6.4.4
To braze the pipe end ..................................................
6.4.5
Using the stop valve and service port ..........................
6.4.6
To remove the pinched pipes.......................................
6.4.7
To connect the refrigerant piping to the outdoor unit ...
6.4.8
To connect the refrigerant branching kit ......................
Checking the refrigerant piping ..................................................
6.5.1
About checking the refrigerant piping ..........................
6.5.2
Checking refrigerant piping: General guidelines ..........
6.5.3
Checking refrigerant piping: Setup...............................
6.5.4
To perform a leak test ..................................................
6.5.5
To perform vacuum drying ...........................................
To insulate the refrigerant piping................................................
Charging refrigerant ...................................................................
6.7.1
About charging refrigerant ...........................................
6.7.2
Precautions when charging refrigerant ........................
6.7.3
To determine the additional refrigerant amount ...........
6.7.4
To charge refrigerant ...................................................
6.7.5
Error codes when charging refrigerant.........................
6.7.6
To fix the fluorinated greenhouse gases label .............
Connecting the electrical wiring..................................................
6.8.1
About connecting the electrical wiring..........................
6.8.2
Precautions when connecting electrical wiring ............
6.8.3
Guidelines when knocking out knockout holes ............
6.8.4
Guidelines when connecting the electrical wiring ........
6.8.5
To connect the electrical wiring on the outdoor unit.....
Finishing the outdoor unit installation .........................................
6.9.1
To finish the transmission wiring..................................
6.9.2
To close the outdoor unit .............................................
27
27
27
28
28
28
29
29
29
30
32
32
33
34
34
35
Overview: Commissioning..........................................................
Precautions when commissioning ..............................................
Checklist before commissioning.................................................
Checklist during commissioning .................................................
8.4.1
About test run...............................................................
8.4.2
To perform a test run (7-LEDs display)........................
8.4.3
Correcting after abnormal completion of the test run...
8.4.4
Operating the unit ........................................................
35
35
35
36
36
36
36
36
9 Hand-over to the user
36
10 Maintenance and service
36
10.1
10.2
10.3
10.4
Overview: Maintenance and service ..........................................
Maintenance safety precautions.................................................
10.2.1 To prevent electrical hazards.......................................
Checklist for yearly maintenance of the outdoor unit .................
About service mode operation....................................................
10.4.1 To use vacuum mode ..................................................
10.4.2 To recover refrigerant ..................................................
11 Troubleshooting
37
37
37
37
37
37
37
38
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
1 General safety precautions
11.1
11.2
11.3
38
38
38
38
20.2.7
12 Disposal
39
13 Technical data
40
20.2.10
20.2.11
20.2.12
20.2.13
20.2.14
20.2.15
13.1
13.2
13.3
13.4
13.5
13.6
Overview: Troubleshooting........................................................
Precautions when troubleshooting ............................................
Solving problems based on error codes....................................
11.3.1 Error codes: Overview ................................................
Overview: Technical data ..........................................................
Dimensions: Outdoor unit..........................................................
Service space: Outdoor unit ......................................................
Components: Outdoor unit ........................................................
Piping diagram: Outdoor unit.....................................................
Wiring diagram: Outdoor unit ....................................................
20.2.8
20.2.9
40
40
41
43
44
45
20.2.16
20.2.17
For the user
47
14 About the system
47
14.1
47
16 Before operation
47
17 Operation
47
17.3
17.4
17.5
54
54
54
54
54
54
54
54
54
54
54
21 Relocation
54
22 Disposal
54
23 Glossary
55
System layout............................................................................ 47
15 User interface
17.1
17.2
Symptom: The user interface display reads "U4" or
"U5" and stops, but then restarts after a few minutes..
Symptom: Noise of air conditioners (Indoor unit).........
Symptom: Noise of air conditioners (Indoor unit,
outdoor unit).................................................................
Symptom: Noise of air conditioners (Outdoor unit) ......
Symptom: Dust comes out of the unit ..........................
Symptom: The units can give off odours......................
Symptom: The outdoor unit fan does not spin .............
Symptom: The display shows "88"...............................
Symptom: The compressor in the outdoor unit does
not stop after a short heating operation .......................
Symptom: The inside of an outdoor unit is warm
even when the unit has stopped ..................................
Symptom: Hot air can be felt when the indoor unit is
stopped ........................................................................
Operation range ........................................................................
Operating the system ................................................................
17.2.1 About operating the system ........................................
17.2.2 About cooling, heating, fan only, and automatic
operation .....................................................................
17.2.3 About the heating operation........................................
17.2.4 To operate the system ................................................
Using the dry program...............................................................
17.3.1 About the dry program ................................................
17.3.2 To use the dry program...............................................
Adjusting the air flow direction...................................................
17.4.1 About the air flow flap .................................................
Setting the master user interface ..............................................
17.5.1 About setting the master user interface ......................
17.5.2 To designate the master user interface (VRV DX)......
17.5.3 To designate the master user interface (RA DX) ........
17.5.4 About control systems.................................................
47
48
48
48
48
48
48
48
48
49
49
49
49
49
49
49
1
General safety precautions
1.1
About the documentation
▪ The original documentation is written in English. All other
languages are translations.
▪ The precautions described in this document cover very important
topics, follow them carefully.
▪ The installation of the system, and all activities described in the
installation manual and the installer reference guide must be
performed by an authorized installer.
1.1.1
Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
18 Energy saving and optimum operation
18.1
18.2
Available main operation methods ............................................ 50
Available comfort settings ......................................................... 50
19 Maintenance and service
19.1
19.2
19.3
19.4
Maintenance after a long stop period ........................................
Maintenance before a long stop period .....................................
About the refrigerant..................................................................
After-sales service and warranty ...............................................
19.4.1 Warranty period ..........................................................
19.4.2 Recommended maintenance and inspection..............
19.4.3 Recommended maintenance and inspection cycles...
19.4.4 Shortened maintenance and replacement cycles .......
20 Troubleshooting
20.1
20.2
50
Error codes: Overview...............................................................
Symptoms that are NOT system malfunctions ..........................
20.2.1 Symptom: The system does not operate ....................
20.2.2 Symptom: Fan operation is possible, but cooling and
heating do not work.....................................................
20.2.3 Symptom: The fan strength does not correspond to
the setting ...................................................................
20.2.4 Symptom: The fan direction does not correspond to
the setting ...................................................................
20.2.5 Symptom: White mist comes out of a unit (Indoor
unit) .............................................................................
20.2.6 Symptom: White mist comes out of a unit (Indoor
unit, outdoor unit) ........................................................
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
50
51
51
51
51
51
51
51
52
52
53
53
53
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
53
Indicates a situation that could result in minor or moderate
injury.
54
NOTICE
54
Indicates a situation that could result in equipment or
property damage.
54
INFORMATION
54
Indicates useful tips or additional information.
Installer and user reference guide
3
1 General safety precautions
Symbol
Explanation
NOTICE
Before installation, read the installation and
operation manual, and the wiring instruction sheet.
Improper installation or attachment of equipment or
accessories could result in electric shock, short-circuit,
leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or
approved by Daikin.
Before performing maintenance and service tasks,
read the service manual.
For more information, see the installer and user
reference guide.
1.2
WARNING
Make sure installation, testing and applied materials
comply with applicable legislation (on top of the
instructions described in the Daikin documentation).
For the user
▪ If you are not sure how to operate the unit, contact your installer.
CAUTION
▪ This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in
a safe way and understand the hazards involved. Children shall
not play with the appliance. Cleaning and user maintenance shall
not be made by children without supervision.
Wear adequate personal protective equipment (protective
gloves, safety glasses,…) when installing, maintaining or
servicing the system.
WARNING
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
To prevent electric shocks or fire:
DANGER: RISK OF BURNING
▪ Do NOT rinse the unit.
▪ 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 operate the unit with wet hands.
▪ Do NOT place any objects containing water on the unit.
NOTICE
▪ Do NOT touch any accidental leaking refrigerant.
▪ Do NOT place any objects or equipment on top of the
unit.
WARNING
▪ Do NOT sit, climb or stand on the unit.
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.
▪ Units are marked with the following symbol:
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
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.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
NOTICE
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
▪ Batteries are marked with the following symbol:
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,…
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.
Also, at least, following information must be provided at an
accessible place at the product:
▪ Instructions for shutting down the system in case of an emergency
▪ Name and address of fire department, police and hospital
▪ Name, address and day and night telephone numbers for
obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
1.3
For the installer
1.3.2
1.3.1
General
▪ Provide sufficient space around the unit for servicing and air
circulation.
If you are not sure how to install or operate the unit, contact your
dealer.
Installer and user reference guide
4
Installation site
▪ Make sure the installation site withstands the unit's weight and
vibration.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
1 General safety precautions
▪ Make sure the area is well ventilated. Do NOT block any
ventilation openings.
NOTICE
▪ Make sure the unit is level.
▪ To avoid compressor breakdown, do NOT charge more
than the specified amount of refrigerant.
Do NOT install the unit in the following places:
▪ When the refrigerant system is to be opened,
refrigerant must be treated according to the applicable
legislation.
▪ In potentially explosive atmospheres.
WARNING
▪ In places where there is machinery that emits electromagnetic
waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
▪ 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 case re-charge is required, refer to the nameplate of the unit. It
states the type of refrigerant and necessary amount.
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
▪ The unit is factory charged with refrigerant and depending on pipe
sizes and pipe lengths some systems require additional charging
of refrigerant.
1.3.3
▪ 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.
Refrigerant
If applicable. See the installation manual or installer reference guide
of your application for more information.
▪ Charge the liquid refrigerant as follows:
NOTICE
Make sure refrigerant piping installation complies with
applicable legislation. In Europe, EN378 is the applicable
standard.
If
A siphon tube is present
Then
Charge with the cylinder upright.
(i.e., the cylinder is marked with
"Liquid filling siphon attached")
NOTICE
Make sure the field piping and connections are not
subjected to stress.
A siphon tube is NOT present
WARNING
Charge with the cylinder upside
down.
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:
▪ Open refrigerant cylinders slowly.
▪ Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
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.
▪ Toxic gas may be produced if refrigerant gas comes
into contact with fire.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leakage 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.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
1.3.4
Brine
If applicable. See the installation manual or installer reference guide
of your application for more information.
WARNING
The selection of the brine MUST be in accordance with the
applicable legislation.
WARNING
Take sufficient precautions in case of brine leakage. If
brine leaks, ventilate the area immediately and contact
your local dealer.
WARNING
The ambient temperature inside the unit can get much
higher than that of the room, e.g. 70°C. In case of a brine
leak, hot parts inside the unit can create a hazardous
situation.
Installer and user reference guide
5
2 About the documentation
1.3.5
WARNING
NOTICE
The use and installation of the application MUST comply
with the safety and environmental precautions specified in
the applicable legislation.
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).
Water
▪ When connecting wiring which is the same thickness,
do as shown in the figure below.
If applicable. See the installation manual or installer reference guide
of your application for more information.
NOTICE
Make sure water quality complies with EU directive
98/83 EC.
1.3.6
▪ For wiring, use the designated power wire and connect
firmly, then secure to prevent outside pressure being
exerted on the terminal board.
Electrical
DANGER: RISK OF ELECTROCUTION
▪ Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage the head and make proper tightening
impossible.
▪ 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.
▪ Over-tightening the terminal screws may break them.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
WARNING
▪ Do NOT touch electrical components with wet hands.
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Do NOT leave the unit unattended when the service
cover is removed.
▪ Make sure all covers are closed before starting up the
unit.
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.
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.
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.
2
About the documentation
2.1
About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
Documentation set
▪ 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.
▪ General safety precautions:
This document is part of a documentation set. The complete set
consists of:
▪ 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
6
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
3 About the box
▪ Installer and user reference guide:
The original documentation is written in English. All other languages
are translations.
▪ 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/supportand-manuals/product-information/
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.
Technical engineering data
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
extranet (authentication required).
For the installer
3
3.2.2
About the box
To handle the outdoor unit
Carry the unit slowly as shown:
3.1
Overview: About the box
This chapter describes what you have to do after the box with the
outdoor unit is delivered on-site.
It contains information about:
▪ Unpacking and handling the units
▪ Removing the accessories from the units
CAUTION
Keep the following in mind:
To avoid injury, do NOT touch the air inlet or aluminium
fins of the unit.
▪ At delivery, the unit must be checked for damage. Any damage
must be reported immediately to the carrier's claims agent.
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
Forklift. As long as the unit remains on its pallet, you can also use a
forklift.
▪ When handling the unit, take into account the following:
Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor
damage.
▪ Choose on beforehand the path along which the unit is to be
brought in.
3.2
Outdoor unit
3.2.1
To unpack the outdoor unit
1
2
3.2.3
3
1×
To remove the accessories from the
outdoor unit
1
Remove the service cover. See "6.2.2 To open the outdoor
unit" on page 15.
2
Remove the accessories.
1
2
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
7
4 About the units and options
a
b
1×
c
1×
d
1×
1×
Code
European market
[*]
Minor model change indication
4.3
e
f
1×
g
1×
2×
h
1×
Explanation
B
About the outdoor unit
This installation manual concerns the VRV IV-S, full inverter driven,
heat pump system.
These units are intended for outdoor installation and aimed for air to
air heat pump applications.
a
b
c
d
e
f
g
h
General safety precautions
Outdoor unit installation and operation manual
Fluorinated greenhouse gases label
Installation information sticker
Gas piping accessory 1 (Ø19.1 mm)
Gas piping accessory 2 (Ø19.1 mm)
Cable tie
Gas piping accessory 3 (Ø15.9 mm)
About the units and options
4
Specification
Capacity
Heating
Ambient design
temperature
4.4
RXYSQ4~6
14.2~18.0 kW
Cooling
12.1~15.5 kW
Heating
–20~15.5°C WB
Cooling
–5~46°C DB
System layout
NOTICE
Overview: About the units and
options
4.1
Design of the system must not be done at temperatures
below –15°C.
INFORMATION
This chapter contains information about:
Not all combinations of indoor units are allowed, for
guidance, see "4.5.2 Possible combinations of indoor
units" on page 9.
▪ Identification of the outdoor unit.
▪ Where the outdoor unit fits in the system layout.
a
▪ With which indoor units and options you can combine the outdoor
units.
4.2
Identification
b
c
c
e
NOTICE
f
When installing or servicing several units at the same time,
make sure NOT to switch the service panels between
different models.
4.2.1
e
d
a
b
c
d
e
Identification label: Outdoor unit
Location
f
g
d
f
g
g
VRV IV-S Heat pump outdoor unit
Refrigerant piping
VRV direct expansion (DX) indoor unit
User interface (dedicated depending on indoor unit type)
BP box (required to connect Residential Air (RA) or Sky Air
(SA) direct expansion (DX) indoor units)
Residential Air (RA) direct expansion (DX) indoor units
User interface (wireless, dedicated depending on indoor
unit type)
4.5
Combining units and options
4.5.1
About combining units and options
NOTICE
To be sure your system setup (outdoor unit+indoor unit(s))
will work, you have to consult the latest technical
engineering data for VRV IV-S heat pump.
Model identification
Example: R X Y S Q 6 TA Y1 B [*]
Code
Explanation
R
Outdoor air cooled
X
Heat pump (no continuous heating)
Y
Single module
S
S series
Q
Refrigerant R410A
4~6
Capacity class
TA
VRV IV series
Y1
Power supply
Installer and user reference guide
8
The VRV IV-S heat pump system can be combined with several
types of indoor units and is intended for R410A use only.
For an overview which units are available you can consult the
product catalogue for VRV IV-S.
An overview is given indicating the allowed combinations of indoor
units and outdoor units. Not all combinations are allowed. They are
subject to rules (combination between outdoor-indoor, combinations
between indoor units, etc.) mentioned in the technical engineering
data.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
5 Preparation
Possible combinations of indoor units
5.2.1
In general following type of indoor units can be connected to a VRV
IV-S heat pump system. The list is non-exhaustive and is depending
on both outdoor unit model and indoor unit model combinations.
Installation site requirements of the
outdoor unit
INFORMATION
Also read the following requirements:
▪ VRV direct expansion (DX) indoor units (air to air applications).
▪ General installation site requirements.
"General safety precautions" chapter.
▪ SA/RA (Sky Air/Residential Air) direct expansion (DX) indoor units
(air to air applications). Further referred to as RA DX indoor units.
These indoor units require a BP box.
▪ AHU (air to air applications): EKEXV-kit+EKEQ-box are required,
depending on application.
the
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
▪ Aircurtain (air to air applications): CYV/CAV (Biddle) series,
depending on application.
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
INFORMATION
▪ Combination of VRV DX and RA DX indoor units is not
allowed.
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
▪ Combination of RA DX and AHU indoor units is not
allowed.
NOTICE
▪ Combination of RA DX and aircurtain indoor units is not
allowed.
This is a class A product. In a domestic environment this
product may cause radio interference in which case the
user may be required to take adequate measures.
Possible options for the outdoor unit
INFORMATION
NOTICE
Refer to the technical engineering data for the latest option
names.
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
Refrigerant branching kit
Model name
Description
Refnet header
KHRQ22M29H
Refnet joint
KHRQ22M20T
For the selection of the optimal branching kit, please refer to
"5.3.4 To select refrigerant branch kits" on page 13.
External control adaptor (DTA104A61/62)
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
c
b
e
The external control adapter has to be installed in the indoor unit.
5
Preparation
5.1
Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
c
(mm)
b
≥1500
To instruct specific operation with an external input coming from a
central control the external control adaptor can be used. Instructions
(group or individual) can be instructed for low noise operation and
power consumption limitation operation.
d
≥1000
4.5.3
See
▪ Service space requirements. See the "Technical data"
chapter.
≥1000
4.5.2
d
0
00
≥1
≥1500
f
≥1500
≥1500
a
a
b
c
d
e
f
Personal computer or radio
Fuse
Earth leakage protector
User interface
Indoor unit
Outdoor unit
In places with weak reception, keep distances of 3 m or more to
avoid electromagnetic disturbance of other equipment and use
conduit tubes for power and transmission lines.
▪ Select a place where rain can be avoided as much as possible.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ Preparing the electrical wiring
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
5.2
▪ Heat exchanger fins are sharp and injury is possible. Choose an
installation location where there is no risk for injury (especially in
areas where children play).
Preparing installation site
Do NOT install the unit in places often used as work place. In case
of construction works (e.g. grinding works) where a lot of dust is
created, the unit must be covered.
Do NOT install the unit in the following places:
Choose the installation location with sufficient place for carrying the
unit in and out of the site.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
9
5 Preparation
▪ Sound sensitive areas (e.g. near a bedroom), so that the
operation noise will cause no trouble.
Note: If the sound is measured under actual installation
conditions, the measured value might be higher than the sound
pressure level mentioned in Sound spectrum in the data book due
to environmental noise and sound reflections.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
a
▪ Where acidic or alkaline vapour is present
Seaside installation. Make sure the outdoor unit is NOT directly
exposed to sea winds. This is to prevent corrosion caused by high
levels of salt in the air, which might shorten the life of the unit.
a
Make sure there is enough installation space
Set the air outlet side at a right angle to the direction of the wind.
Install the outdoor unit away from direct sea winds.
Example: Behind the building.
a
b
b
a
c
a
a
b
If the outdoor unit is exposed to direct sea winds, install a
windbreaker.
5.2.2
▪ Height of windbreaker≥1.5×height of outdoor unit
▪ Mind the service space requirements when installing the
windbreaker.
d
Prevailing wind direction
Air outlet
Additional installation site requirements
of the outdoor unit in cold climates
Protect the outdoor unit against direct snowfall and take care that the
outdoor unit is NEVER snowed up.
c
b
a
d
c
a
c
Sea wind
Building
Outdoor unit
Windbreaker
Strong winds (≥18 km/h) blowing against the outdoor unit’s air outlet
causes short circuit (suction of discharge air). This may result in:
d
a
b
c
d
b
c
▪ deterioration of the operational capacity;
▪ frequent frost acceleration in heating operation;
▪ disruption of operation due to decrease of low pressure or
increase of high pressure;
▪ a broken fan (if a strong wind blows continuously on the fan, it
may start rotating very fast, until it breaks).
a
b
c
d
Snow cover or shed
Pedestal (minimum height = 150 mm)
Prevailing wind direction
Air outlet
It is recommended to install a baffle plate when the air outlet is
exposed to wind.
Turn the air outlet side towards the building's wall, fence or screen.
Installer and user reference guide
10
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
5 Preparation
NOTICE
When operating the unit in heating in a low outdoor
ambient temperature with high humidity conditions, make
sure to take precautions to keep the drain holes of the unit
free by using proper equipment.
a
b
In heating:
20
15.5
15
a
b
10
TAO (°C WB)
5
a
Direction of the refrigerant flow
Room where refrigerant leak has occurred (outflow of all
the refrigerant from the system)
Pay special attention to places, such as basements etc., where
refrigerant can stay, since refrigerant is heavier than air.
b
0
To check the maximum concentration level
–5
Check the maximum concentration level in accordance with steps 1
to 4 below and take whatever action is necessary to comply.
–10
–15
1
Calculate the amount of refrigerant (kg) charged to each system
separately.
–20
Formula
A+B=C
A
Amount of refrigerant in a single unit system
(amount of refrigerant with which the system
is charged before leaving the factory)
B
Additional charging amount (amount of
refrigerant added locally)
C
Total amount of refrigerant (kg) in the
system
10
15
20
25 27 30
TAI (°C DB)
a Warming up operation range
b Operation range
TAI Ambient indoor temperature
5.2.3
TAO Ambient outdoor temperature
NOTICE
If the unit is selected to operate at ambient temperatures
lower than –5°C for 5 days or longer, with relative humidity
levels exceeding 95%, we recommend to apply a Daikin
range specifically designed for such application and/or to
contact your dealer for further advice.
Where a single refrigerant facility is divided into 2 entirely
independent refrigerant systems, use the amount of
refrigerant with which each separate system is charged.
Securing safety against refrigerant leaks
2
Calculate the volume of the room (m3) where the indoor unit is
installed. In a case such as the following, calculate the volume
of (D), (E) as a single room or as the smallest room.
D
Where there are no smaller room divisions:
E
Where there is a room division, but there is an opening
between the rooms sufficiently large to permit a free
flow of air back and forth.
About safety against refrigerant leaks
The installer and system specialist shall secure safety against
leakage according to local regulations or standards. The following
standards may be applicable if local regulations are not available.
This system uses R410A as refrigerant. R410A itself is an entirely
safe non-toxic, non-combustible refrigerant. Nevertheless care must
be taken to ensure that the system is installed in a room which is
sufficiently large. This assures that the maximum concentration level
of refrigerant gas is not exceeded, in the unlikely event of major leak
in the system and this in accordance to the local applicable
regulations and standards.
About the maximum concentration level
The maximum charge of refrigerant and the calculation of the
maximum concentration of refrigerant is directly related to the
humanly occupied space in to which it could leak.
The unit of measurement of the concentration is kg/m3 (the weight in
kg of the refrigerant gas in 1 m3 volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
According to the appropriate European Standard, the maximum
allowed concentration level of refrigerant to a humanly space for
R410A is limited to 0.44 kg/m3.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
a
b
a Opening between the rooms
b Partition (Where there is an opening without a door
or where there are openings above and below the door
which are each equivalent in size to 0.15% or more of
the floor area.)
Installer and user reference guide
11
5 Preparation
3
4
Calculate the refrigerant density using the results of the
calculations in steps 1 and 2 above. If the result of the above
calculation exceeds the maximum concentration level, a
ventilation opening to the adjacent room shall be made.
5.3.3
To select the piping size
Determine the proper size referring to following tables and reference
figure (only for indication).
INFORMATION
Formula
F/G≤H
F
Total volume of refrigerant in the refrigerant
system
▪ Combination of VRV DX and RA DX indoor units is not
allowed.
G
Size (m3) of smallest room in which there is
an indoor unit installed
▪ Combination of RA DX and AHU indoor units is not
allowed.
H
Maximum concentration level (kg/m3)
▪ Combination of RA DX and aircurtain indoor units is not
allowed.
Calculate the refrigerant density taking the volume of the room
where the indoor unit is installed and the adjacent room. Install
ventilation openings in the door of adjacent rooms until the
refrigerant density is smaller than the maximum concentration
level.
5.3
Preparing refrigerant piping
5.3.1
Refrigerant piping requirements
INFORMATION
If you install RA DX indoor units, you have to configure
field setting [2‑38] (= type of installed indoor units). See
"7.2.8 Mode 2: Field settings" on page 30.
VRV DX
RA DX
1
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
The refrigerant R410A requires strict cautions for keeping
the system clean, dry and tight.
▪ Clean and dry: foreign materials (including mineral oils
or moisture) should be prevented from getting mixed
into the system.
▪ Tight: R410A does not contain any chlorine, does not
destroy the ozone layer, and does not reduce earth's
protection against harmful ultraviolet radiation. R410A
can contribute slightly to the greenhouse effect if it is
released. Therefore we should take special attention to
check the tightness of the installation.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
3-1
D
C-2
3-2
C-3
3-3
1
2
3-1~3-4
4
5
A
B-1 B-2
C-1~C-4
D
E
D
4
2
C-1
A
2
B-2
2
NOTICE
A
2
B-1
1
C-4
E
3-4
5
4
E
5
E
5
E
5
Outdoor unit
Refrigerant branch kits
VRV DX indoor units
BP units
RA DX indoor units
Piping between outdoor unit and (first) refrigerant branch
kit
Piping between refrigerant branch kits
Piping between refrigerant branch kit and indoor unit
Piping between refrigerant branch kit and BP unit
Piping between BP unit and RA DX indoor unit
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the following
into account:
▪ Select the pipe size nearest to the required size.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
5.3.2
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping temper grade and thickness:
Outer diameter
(Ø)
6.4 mm (1/4")
Temper grade
≥0.80 mm
15.9 mm (5/8")
Annealed (O)
≥0.99 mm
19.1 mm (3/4")
Half hard (1/2H)
≥0.80 mm
▪ The additional refrigerant calculation has to be adjusted as
mentioned in "6.7.3 To determine the additional refrigerant
amount" on page 22.
A: Piping between outdoor unit and (first)
refrigerant branch kit
Thickness (t)(a)
Annealed (O)
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
Ø
9.5 mm (3/8")
12.7 mm (1/2")
t
When the equivalent pipe length between outdoor and indoor units is
90 m or more, the size of the main gas pipe must be increased (sizeup). If the recommended gas pipe (size-up) is not available, you
must use the standard size (which might result in a small capacity
decrease).
a
b
c
e
22.2 mm (7/8")
(a)
d
Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
a
b
c
d
e
Installer and user reference guide
12
Outdoor unit
Main gas pipe
Increase
First refrigerant branch kit
Indoor unit
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
5 Preparation
Outdoor unit
capacity type (HP)
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
Standard
Size-up
4+5
15.9
19.1
6
19.1
22.2
E: Piping between BP unit and RA DX indoor unit
Indoor unit capacity
index
9.5
B: Piping between refrigerant branch kits
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
<150
15.9
9.5
150≤x≤182
19.1
Example: Downstream capacity for B-1 = capacity index of unit 3-1
+ capacity index of unit 3-2
C: Piping between refrigerant branch kit and
indoor unit
Use the same diameters as the connections (liquid, gas) on the
indoor units. The diameters of the indoor units are as follows:
Indoor unit capacity
index
Piping outer diameter size (mm)
Liquid pipe
9.5
6.4
50
12.7
9.5
71
5.3.4
15.9
To select refrigerant branch kits
For piping example, refer to "5.3.3 To select the piping size" on
page 12.
Refnet joint at first branch (counting from outdoor unit)
When using refnet joints at the first branch counted from the outdoor
unit side, choose from the following table in accordance with the
capacity of the outdoor unit. Example: Refnet joint A→B‑1.
Outdoor unit capacity type
(HP)
Refrigerant branch kit
4~6
KHRQ22M20T
Refnet joints at other branches
For refnet joints other than the first branch, select the proper branch
kit model based on the total capacity index of all indoor units
connected after the refrigerant branch. Example: Refnet joint
B‑1→C‑1.
Gas pipe
Liquid pipe
15~50
12.7
6.4
Indoor unit capacity index
Refrigerant branch kit
63~140
15.9
9.5
<182
KHRQ22M20T
D: Piping between refrigerant branch kit and BP
unit
Total capacity index
of connected indoor
units
5.3.5
Gas pipe
15~42
60
Choose from the following table in accordance with the indoor unit
total capacity type, connected downstream. Do not let the
connection piping exceed the refrigerant piping size chosen by the
general system model name.
Indoor unit capacity
index
Piping outer diameter size (mm)
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
15~62
12.7
6.4
63~149
15.9
9.5
150~182
19.1
Refnet headers
Concerning refnet headers, choose from the following table in
accordance with the total capacity of all the indoor units connected
below the refnet header.
Indoor unit capacity index
Refrigerant branch kit
<182
KHRQ22M29H
INFORMATION
Maximum 8 branches can be connected to a header.
Refrigerant piping length and height difference
The piping lengths and height differences must comply with the following requirements. Two patterns will be discussed:
• Outdoor with 100% VRV DX indoor units
• Outdoor with 100% RA DX indoor units
Requirement
Maximum actual piping length
Limit
VRV DX
RA DX
100 m
65 m
▪ Example 1.1, unit 8: a+b+c+d+e+f+g+p≤Limit
▪ Example 1.2, unit 6: a+b+h≤Limit
▪ Example 1.2, unit 8: a+i+k≤Limit
▪ Example 1.3, unit 8: a+i≤Limit
▪ Example 2, unit 18: a+b+m≤Limit
Maximum equivalent piping length(a)
130 m
85 m
Maximum total piping length
300 m
140 m
N/A
5 m
▪ Example 1.1: a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤Limit
▪ Example 2: a+b+c+d+e+f+g+h+i+j+k+l+m≤Limit
Minimum length outdoor-first refrigerant branch kit
▪ Example 2: Limit≤a
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
13
5 Preparation
Requirement
Limit
VRV DX
RA DX
40 m
40 m
N/A
55 m
Maximum length first branch kit-indoor unit
▪ Example 1.1, unit 8: b+c+d+e+f+g+p≤Limit
▪ Example 1.2, unit 6: b+h≤Limit
▪ Example 1.2, unit 8: i+k≤Limit
▪ Example 1.3, unit 8: i≤Limit
▪ Example 2, unit 18: b+m≤Limit
Maximum length outdoor-BP
▪ Example 2, BP3: a+b≤Limit
Minimum and maximum length BP-indoor
Indoor unit capacity index<60
N/A
2~15 m
▪ Example 2, unit 18: Min.≤m≤Max.
Indoor unit capacity index=60
N/A
2~12 m
N/A
2~8 m
50 m
30 m
Indoor unit capacity index=71
Maximum height difference outdoor-indoor Outdoor higher than indoor
▪ Examples: H1≤Limit
Outdoor lower than indoor
40 m
Maximum height difference indoor-indoor
15 m
15 m
N/A
30 m
N/A
15 m
N/A
5 m
▪ Examples: H2≤Limit
Maximum height difference outdoor-BP
▪ Example 2: H3≤Limit
Maximum height difference BP-BP
▪ Example 2: H4≤Limit
Maximum height difference BP-indoor
▪ Example 2: H5≤Limit
(a)
Assume equivalent piping length of refnet joint=0.5 m and refnet header=1 m (for calculation purposes of equivalent piping length, not for
refrigerant charge calculations).
Example 1 (VRV DX indoor units)
Example 2 (RA DX indoor units)
Example 1.1
b
a
A
c
B
h
i
1
d
C
e
D
j
2
k
3
g
f
E
F
l
4
G
m
5
n
6
p
7
H2
a
H1
d
H1
A
H1
c
d
1
e
2
B
b
3
4
f
5
H4
BP1
i
a
c
H3
8
Example 1.2
b
A
g
6
j
7
8
h
g
f
k
H2
11
i
14
15
16
H2
h
12
e
BP2
j k
13
BP3
l
17
H5
m
18
Example 1.3
a
H1
b
1~8
11~18
1
c
2
d
3
e
4
5
f
6
g
h
7
H2
i
8
Refnet joint
Refnet header
BP box
VRV DX indoor units
RA DX indoor units
5.4
Preparing electrical wiring
5.4.1
About electrical compliance
This equipment complies with:
Installer and user reference guide
14
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
6 Installation
▪ EN/IEC 61000‑3‑12 provided that the short-circuit power Ssc is
greater than or equal to the minimum Ssc value at the interface
point between the user's supply and the public system.
▪ EN/IEC 61000‑3‑12 = European/International Technical
Standard setting the limits for harmonic currents produced by
equipment connected to public low-voltage systems with input
current >16 A and ≤75 A per phase.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a short-circuit power Ssc greater than or equal to the
minimum Ssc value.
Model
Minimum Ssc value
RXYSQ4~6
910 kVA
INFORMATION
For installation of the indoor unit (mounting the indoor unit,
connecting the refrigerant piping to the indoor unit,
connecting the electrical wiring to the indoor unit …), see
the installation manual of the indoor unit.
6.2
Opening the units
6.2.1
About opening the units
At certain times, you have to open the unit. Example:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
5.4.2
Safety device requirements
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model
Minimum circuit
ampacity
Recommended
fuses
18.5 A
25 A
RXYSQ4~6
6.2.2
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
For all models:
▪ Phase and frequency: 3N~ 50 Hz
▪ Voltage: 380-415 V
▪ Transmission line section:
Transmission wiring
Vinyl cords with 0.75 to
1.25 mm² sheath or cables
(2‑core wires)
Maximum wiring length
300 m
2×
(= distance between outdoor
and furthest indoor unit)
Total wiring length
600 m
(= distance between outdoor
and all indoors)
If the total transmission wiring exceeds these limits, it may
result in communication error.
6.3
Mounting the outdoor unit
6.3.1
About mounting the outdoor unit
Typical workflow
Mounting the outdoor unit typically consists of the following stages:
6
Installation
6.1
Overview: Installation
This chapter describes what you have to do and know on-site to
install the system.
Typical workflow
Installation typically consists of the following stages:
1
2
3
4
Providing the installation structure.
Installing the outdoor unit.
Preventing the unit from falling over.
Protecting the unit against snow and wind by installing a snow
cover and baffle plates. See "Preparing installation site" in
"5 Preparation" on page 9.
6.3.2
Precautions when mounting the outdoor
unit
▪ Mounting the outdoor unit.
INFORMATION
▪ Mounting the indoor units.
Also read the precautions and requirements in the
following chapters:
▪ Connecting the refrigerant piping.
▪ Checking the refrigerant piping.
▪ Charging refrigerant.
▪ General safety precautions
▪ Preparation
▪ Connecting the electrical wiring.
▪ Finishing the outdoor installation.
▪ Finishing the indoor installation.
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VRV IV-S system air conditioner
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Installer and user reference guide
15
6 Installation
6.3.3
▪ Install the unit on a base to make sure that there is a proper
drainage in order to avoid ice accumulation.
To provide the installation structure
Check the strength and level of the installation ground so that the
unit will not cause any operating vibration or noise.
Fix the unit securely by means of foundation bolts in accordance
with the foundation drawing.
Prepare 4 sets of anchor bolts, nuts and washers (field supply) as
follows:
▪ Prepare a water drainage channel around the foundation to drain
waste water surrounding the unit.
▪ Avoid drain water flowing over the footpath, so that it does not
become slippery in case of ambient freezing temperatures.
▪ If you install the unit on a frame, install a waterproof plate within
150 mm of the bottom side of the unit in order to prevent the
invasion of water in the unit and to avoid the drain water dripping
(see the following illustration).
4× M12
NOTICE
62
0
>150
)
55
-3
45
(3
35
0
If drain holes of the outdoor unit are covered by a mounting
base or by floor surface, raise the unit to provide a free
space of more than 150 mm under the outdoor unit.
(mm)
Make sure not to cover the drain holes.
≥150 mm
a
a
INFORMATION
The recommended height of the upper protruding part of
the bolts is 20 mm.
Drain holes (dimensions in mm)
a
a
68 67
151
20
a
NOTICE
Fix the outdoor unit to the foundation bolts using nuts with
resin washers (a). If the coating on the fastening area is
stripped off, the nuts rust easily.
a
6.3.6
a
6.3.4
395
47
To install the outdoor unit
191
Drain holes
To prevent the outdoor unit from falling
over
In case the unit is installed in places where strong wind can tilt the
unit, take following measure:
1
Prepare 2 cables as indicated in the following illustration (field
supply).
2
Place the 2 cables over the outdoor unit.
3
Insert a rubber sheet between the cables and the outdoor unit
to prevent the cable from scratching the paint (field supply).
4
Attach the cable’s ends. Tighten those ends.
4× M12
6.3.5
To provide drainage
▪ Make sure that condensation water can be evacuated properly.
Installer and user reference guide
16
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VRV IV-S system air conditioner
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6 Installation
6.4
Connecting the refrigerant piping
6.4.1
About connecting the refrigerant piping
6.4.4
To braze the pipe end
NOTICE
Before connecting the refrigerant piping
Precautions when connecting field piping. Add brazing
material as shown in the figure.
Make sure the outdoor and indoor units are mounted.
≤Ø25.4
Typical workflow
1
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting refrigerant branch kits
1
▪ Connecting the refrigerant piping to the indoor units (see the
installation manual of the indoor units)
▪ When brazing, blow through with nitrogen to prevent creation of
large quantities of oxidised film on the inside of the piping. This
film adversely affects valves and compressors in the refrigerating
system and prevents proper operation.
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
▪ Pipe bending
▪ Set the nitrogen pressure to 20 kPa (0.2 bar) (just enough so it
can be felt on the skin) with a pressure-reducing valve.
▪ Brazing
▪ Using the stop valves
a
b
c
d
e
▪ Removing pinched pipes
Precautions when connecting the
refrigerant piping
6.4.2
f
a
b
c
d
e
f
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Do NOT use anti-oxidants when brazing pipe joints.
Residue can clog pipes and break equipment.
▪ Preparation
DANGER: RISK OF BURNING
NOTICE
Take the following precautions on refrigerant piping into
account:
▪ Avoid anything but the designated refrigerant to get
mixed into the refrigerant cycle (e.g. air).
▪ Do NOT use flux when brazing copper-to-copper refrigerant
piping. Use phosphor copper brazing filler alloy (BCuP), which
does not require flux.
Flux has an extremely harmful influence on refrigerant piping
systems. For instance, if chlorine based flux is used, it will cause
pipe corrosion or, in particular, if the flux contains fluorine, it will
deteriorate the refrigerant oil.
▪ Only use R410A when adding refrigerant.
6.4.5
▪ Only use installation tools (e.g. manifold gauge set) that
are exclusively used for R410A installations to
withstand the pressure and to prevent foreign materials
(e.g. mineral oils and moisture) from mixing into the
system.
To handle the stop valve
▪ Protect the piping as described in the following table to
prevent dirt, liquid or dust from entering the piping.
▪ Use caution when passing copper tubes through walls.
Unit
Outdoor unit
Indoor unit
Installation period
Protection method
>1 month
Pinch the pipe
<1 month
Pinch or tape the pipe
Using the stop valve and service port
▪ Make sure to keep all stop valves open during operation.
▪ The figure below shows the name of each part required in
handling the stop valve.
▪ The stop valve is factory closed.
a
b
c
d
Regardless of the
period
a
b
c
d
INFORMATION
a
Do NOT open the refrigerant stop valve before checking
the refrigerant piping. When you need to charge additional
refrigerant it is recommended to open the refrigerant stop
valve after charging.
6.4.3
f
Refrigerant piping
Part to be brazed
Taping
Manual valve
Pressure-reducing valve
Nitrogen
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
b
Pipe bending guidelines
Use a pipe bender for bending. All pipe bends should be as gentle
as possible (bending radius should be 30~40 mm or larger).
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
e
d
c
Installer and user reference guide
17
6 Installation
a
b
c
d
e
Service port
Stop valve cover
Hexagon hole
Shaft
Seal
To open the stop valve
1
Remove the stop valve cover.
2
Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
3
▪ After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
▪ Check for refrigerant leaks after tightening the service port cover.
Tightening torques
Stop valve
size (mm)
Tightening torque N•m (turn clockwise to close)
Shaft
Valve body Hexagonal
wrench
When the stop valve cannot be turned any further, stop turning.
Result: The valve is now open.
Ø9.5
5.4~6.6
To fully open the Ø19.1 mm stop valve, turn the hexagonal wrench
until a torque between 27 and 33 N•m is achieved.
Ø12.7
8.1~9.9
Ø19.1
27.0~33.0
Inadequate torque may cause leakage of refrigerant and breakage of
the stop valve cap.
6.4.6
4 mm
Cap (valve
lid)
Service
port
13.5~16.5
11.5~13.9
18.0~22.0
8 mm
22.5~27.5
To remove the pinched pipes
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
2
1
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
3
Use the following procedure to remove the pinched piping:
1
Remove the valve cover and make sure that the stop valves are
fully closed.
4
a
NOTICE
b
c
Pay attention that mentioned torque range is applicable for
opening Ø19.1 mm stop valves only.
d
To close the stop valve
1
Remove the stop valve cover.
2
Insert a hexagon wrench into the stop valve and turn the stop
valve clockwise.
3
When the stop valve cannot be turned any further, stop turning.
a
b
c
d
2
Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
p<
Result: The valve is now closed.
p>
A
Closing direction:
a
B
R410A
b
c
3
▪ Check for refrigerant leaks after tightening the stop valve cover.
g
e
a
b
c
d
e
f
g
A
B
▪ The stop valve cover is sealed where indicated by the arrow. Take
care not to damage it.
f
d
N2
To handle the stop valve cover
▪ After handling the stop valve, make sure to tighten the stop valve
cover securely. For the tightening torque, refer to the table below.
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
Valve A
Valve B
Recover gas and oil from the pinched piping by using a
recovery unit.
CAUTION
Do not vent gases into the atmosphere.
To handle the service port
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
Installer and user reference guide
18
4
When all gas and oil is recovered from the pinched piping,
disconnect the charge hose and close the service ports.
5
Cut off the lower part of the gas and liquid stop valve pipes
along the black line. Use an appropriate tool (e.g. a pipe cutter,
a pair of nippers).
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VRV IV-S system air conditioner
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6 Installation
4
Do the following:
▪ Connect the liquid pipe (a) to the liquid stop valve. (brazing)
▪ Connect the gas pipe (b) to the gas stop valve. (brazing)
b
a
NOTICE
When brazing: First braze the liquid side piping, then the
gas side piping. Enter the electrode from the front of the
unit and the welding torch from the right side to braze with
the flames facing outside and avoid the compressor sound
insulation and other piping.
WARNING
A
A
e
d
c
Never remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
6
Wait until all oil is dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
6.4.7
a
b
a
c
b
f
g
a Electrode
To connect the refrigerant piping to the
outdoor unit
b Burning-resistant plate
c Welding torch
NOTICE
d Flames
Be sure that the field installed piping does not touch other
pipes, the bottom panel or side panel. Especially for the
bottom and side connection, be sure to protect the piping
with suitable insulation, to prevent it from coming into
contact with the casing.
1
e Compressor sound insulation
f Liquid side piping
g Gas side piping
▪ Connect the gas piping accessories (c, d), and cut them to
the required length (d1).
Do the following:
▪ Remove the service cover. See "6.2.2 To open the outdoor
unit" on page 15.
▪ Remove the piping intake plate (a) with screw (b).
Choose a piping route (a, b, c or d).
d
a
3
Possibility 2: To the back
a
b
2
Possibility 1: To the front
d1 d
c
Possibility 3: To the side
c
b
c
d
Possibility 4: Downwards
If you have chosen the downwards piping route:
▪ Drill (a, 4×) and remove the knockout hole (b).
▪ Cut out the slits (c) with a metal saw.
4× Ø6 mm
a
b
d
d1
c d d1
c
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VRV IV-S system air conditioner
4P482257-1 – 2017.03
c
5
Reattach the service cover and the piping intake plate.
Installer and user reference guide
19
6 Installation
6
Seal all gaps (example: a) to prevent snow and small animals
from entering the system.
6.5
Checking the refrigerant piping
6.5.1
About checking the refrigerant piping
Refrigerant piping works are
finished?
a
No
Finish piping work.
Yes
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.
No
Use procedure:
"Method 1: Before power ON
(regular method)".
Yes
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
6.4.8
The indoor units and/or
outdoor unit were already
powered ON?
To connect the refrigerant branching kit
For installation of the refrigerant branching kit, refer to the installation
manual delivered with the kit.
▪ Mount the refnet joint so that it branches either horizontally or
vertically.
▪ Mount the refnet header so that it branches horizontally.
Use procedure:
"Method 2: After power ON".
It is very important that all refrigerant piping work is done before the
units (outdoor or indoor) are powered on.
When the units are powered on, the expansion valves will initialise.
This means that they will close. Leak test and vacuum drying of field
piping and indoor units is impossible when this happens.
Therefore, there will be explained 2 methods for initial installation,
leak test and vacuum drying.
Method 1: Before power ON
If the system has not yet been powered on, no special action is
required to perform the leak test and the vacuum drying.
b
c
±30°
A
a
Method 2: After power ON
If the system has already been powered on, activate setting [2‑21]
(refer to "7.2.4 To access mode 1 or 2" on page 28). This setting
will open field expansion valves to guarantee a R410A piping
pathway and make it possible to perform the leak test and the
vacuum drying.
NOTICE
Make sure that all indoor units connected to the outdoor
unit are powered on.
a
B
NOTICE
Wait until the outdoor unit has finished the initialisation to
apply setting [2‑21].
a
b
c
Horizontal surface
Refnet joint mounted vertically
Refnet joint mounted horizontally
Leak test and vacuum drying
Checking the refrigerant piping involves:
▪ Checking for any leakages in the refrigerant piping.
▪ Performing vacuum drying to remove all moisture, air or nitrogen
in the refrigerant piping.
If there is a possibility of moisture being present in the refrigerant
piping (for example, water may have entered the piping), first carry
out the vacuum drying procedure below until all moisture has been
removed.
All piping inside the unit has been factory tested for leaks.
Only field installed refrigerant piping needs to be checked.
Therefore, make sure that all the outdoor unit stop valves are firmly
closed before performing leak test or vacuum drying.
NOTICE
Make sure that all (field supplied) field piping valves are
OPEN (not outdoor unit stop valves!) before you start leak
test and vacuuming.
Installer and user reference guide
20
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VRV IV-S system air conditioner
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6 Installation
For more information on the state of the valves, refer to
"6.5.3 Checking refrigerant piping: Setup" on page 21.
6.5.2
Checking refrigerant piping: General
guidelines
3
To check for leaks: Pressure leak test
1
Break the vacuum by pressurising with nitrogen gas to a
minimum gauge pressure of 0.2 MPa (2 bar). Never set the
gauge pressure higher than the maximum operation pressure of
the unit, i.e. 4.0 MPa (40 bar).
2
Test for leaks by applying a bubble test solution to all piping
connections.
3
Discharge all nitrogen gas.
Connect the vacuum pump through a manifold to the service port of
all stop valves to increase efficiency (refer to "6.5.3 Checking
refrigerant piping: Setup" on page 21).
NOTICE
Use a 2-stage vacuum pump with a non-return valve or a
solenoid valve that can evacuate to a gauge pressure of
–⁠100.7 kPa (−⁠1.007 bar)(5 Torr absolute).
Should the pressure rise, the system may either contain
moisture (see vacuum drying below) or have leaks.
NOTICE
Make sure to use a recommended bubble test solution
from your wholesaler. Do not use soap water, which may
cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping
gets cold), and/or lead to corrosion of flared joints (soap
water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
NOTICE
Make sure the pump oil does not flow oppositely into the
system while the pump is not working.
NOTICE
Do not purge the air with refrigerants. Use a vacuum pump
to evacuate the installation.
6.5.5
6.5.3
Checking refrigerant piping: Setup
p<
a
NOTICE
p>
A
B
d
The connections to the indoor units and all indoor units
should also be leak and vacuum tested. Keep, if existing,
all (field supplied) field valves to the indoor units open as
well.
g
f
C
Leak test and vacuum drying should be done before the
power supply is set to the unit. If not, see "6.5.1 About
checking the refrigerant piping" on page 20 for more
information.
N2
b
c
e
a
b
c
d
e
f
g
A
B
C
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
Valve A
Valve B
Valve C
Valve
To remove all moisture from the system, proceed as follows:
1
Evacuate the system for at least 2 hours to a target vacuum of
–⁠100.7 kPa (–⁠1.007 bar)(5 Torr absolute).
2
Check that, with the vacuum pump turned off, the target
vacuum is maintained for at least 1 hour.
3
Should you fail to reach the target vacuum within 2 hours or
maintain the vacuum for 1 hour, the system may contain too
much moisture. In that case, break the vacuum by pressurising
with nitrogen gas to a gauge pressure of 0.05 MPa (0.5 bar)
and repeat steps 1 to 3 until all moisture has been removed.
4
Depending on whether you want to immediately charge
refrigerant through the refrigerant charge port or first pre-charge
a portion of refrigerant through the liquid line, either open the
outdoor unit stop valves, or keep them closed. See "6.7.4 To
charge refrigerant" on page 23 for more information.
State of valve
Valve A
Open
Valve B
Open
Valve C
Open
Liquid line stop valve
Close
Gas line stop valve
Close
NOTICE
The connections to the indoor units and all indoor units
should also be leak and vacuum tested. Keep any possible
(field supplied) field piping valves open as well.
Refer to the indoor unit installation manual for more details.
Leak test and vacuum drying should be done before the
power supply is set to the unit. If not, see also the flow
chart earlier described in this chapter (see "6.5.1 About
checking the refrigerant piping" on page 20).
6.5.4
To perform a leak test
The leak test must satisfy the specifications of EN378‑2.
To check for leaks: Vacuum leak test
1
Evacuate the system from the liquid and gas piping to
–⁠100.7 kPa (–⁠1.007 bar)(5 Torr absolute) for more than 2 hours.
2
Once reached, turn off the vacuum pump and check that the
pressure does not rise for at least 1 minute.
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VRV IV-S system air conditioner
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To perform vacuum drying
INFORMATION
After opening the stop valve, it is possible that the pressure
in the refrigerant piping does NOT increase. This might be
caused by e.g. the closed state of the expansion valve in
the outdoor unit circuit, but does NOT present any problem
for correct operation of the unit.
6.6
To insulate the refrigerant piping
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
▪ Make sure to insulate the connection piping and refrigerant branch
kits entirely.
▪ Be sure to insulate the liquid and gas piping (for all units).
▪ Use heat resistant polyethylene foam which can withstand a
temperature of 70°C for liquid piping and polyethylene foam which
can withstand a temperature of 120°C for gas piping.
Installer and user reference guide
21
6 Installation
▪ Reinforce the insulation on the refrigerant piping according to the
installation environment.
Ambient
temperature
Humidity
Minimum thickness
≤30°C
75% to 80% RH
15 mm
>30°C
≥80% RH
20 mm
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.
NOTICE
If operation is performed within 12 minutes after the indoor
and outdoor units are turned on, the compressor will not
operate before the communication is established in a
correct way between outdoor unit(s) and indoor units.
Condensation might form on the surface of the insulation.
▪ If there is a possibility that condensation on the stop valve might
drip down into the indoor unit through gaps in the insulation and
piping because the outdoor unit is located higher than the indoor
unit, this must be prevented by sealing up the connections. See
below figure.
NOTICE
Before starting charging procedures, check if the 7‑LEDs
display is as normal (see "7.2.4 To access mode 1 or 2" on
page 28), and there is no malfunction code on the user
interface of the indoor unit. If a malfunction code is
present, see "11.3 Solving problems based on error
codes" on page 38.
b
a
NOTICE
Make sure all connected indoor units are recognised
(setting [1‑5]).
a
b
Insulation material
Caulking etc.
6.7
Charging refrigerant
6.7.1
About charging refrigerant
NOTICE
Close the front panel before any refrigerant charge
operation is executed. Without the front panel attached the
unit cannot judge correctly whether it is operating properly
or not.
NOTICE
The outdoor unit is factory charged with refrigerant, but depending
on the field piping you have to charge additional refrigerant.
In case of maintenance and the system (outdoor unit+field
piping+indoor units) does not contain any refrigerant any
more (e.g., after refrigerant reclaim operation), the unit has
to be charged with its original amount of refrigerant (refer
to the nameplate on the unit) and the determined additional
refrigerant amount.
Before charging refrigerant
Make sure the outdoor unit's external refrigerant piping is checked
(leak test, vacuum drying).
Typical workflow
Charging additional refrigerant typically consists of the following
stages:
1
2
3
Determining how much you have to charge additionally.
Charging additional refrigerant (pre-charging and/or charging).
Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.
6.7.2
Precautions when charging refrigerant
6.7.3
To determine the additional refrigerant
amount
INFORMATION
For final charge adjustment in a test laboratory, contact
your dealer.
Formula:
R=[(X1×Ø9.5)×0.059+(X2×Ø6.4)×0.022]
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
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.
R
X1...2
Additional refrigerant to be charged [in kg and rounded off
to 1 decimal place]
Total length [m] of liquid piping size at Øa
Metric piping. When using metric piping, replace the weight factors
in the formula by the ones from the following table:
Inch piping
Weight factor
Piping
Weight factor
Ø6.4 mm
0.022
Ø6 mm
0.018
Ø9.5 mm
0.059
Ø10 mm
0.065
Connection ratio requirements. When selecting indoor units, the
connection ratio must comply with the following requirements. For
more information, see the technical engineering data.
Indoor units
HP
Installer and user reference guide
22
Total CR(a)
CR per type(b)
VRV DX
NOTICE
If the power of some units is turned off, the charging
procedure cannot be finished properly.
Metric piping
Piping
VRV DX
RA DX
4
100~130%
—
5
80~130%
—
6
70~130%
—
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VRV IV-S system air conditioner
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6 Installation
Indoor units
HP
Total CR(a)
VRV DX
RA DX
RA DX
4
100~130%
—
100~130%
5
80~130%
—
80~130%
6
70~130%
—
70~130%
(a)
(b)
6.7.4
CR per type(b)
Total CR = Total indoor unit capacity connection ratio
CR per type = Allowable capacity connection ratio per
indoor unit type
To charge refrigerant
Charging refrigerant (in manual additional refrigerant charge
mode)
The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the manual additional
refrigerant charge mode.
5
p<
R410A
a
The refrigerant charging port is connected to the piping
inside the unit. The unit's internal piping is already factory
charged with refrigerant, so be careful when connecting
the charge hose.
p>
B
d
g
f
C
6
Open all outdoor unit stop valves. At this point, valve A must
remain closed!
7
Take all the precautions mentioned in "7 Configuration" on
page 27 and "8 Commissioning" on page 35 into account.
8
Turn on the power of the indoor units and outdoor unit.
9
Activate setting [2‑20] to start the manual additional refrigerant
charge mode. For details, see "7.2.8 Mode 2: Field settings" on
page 30.
N2
b
c
e
a
b
c
d
e
f
g
A
B
C
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
Valve A
Valve B
Valve C
2
Open valves C and B.
3
Pre‑charge refrigerant until the determined additional refrigerant
amount is reached or pre‑charging is not possible anymore, and
then close valves C and B.
4
Do one of the following:
If
Then
The determined additional
Disconnect the manifold from
refrigerant amount is reached the liquid line.
You do not have to perform the
"Charging refrigerant (in
manual additional refrigerant
charge mode)" instructions.
Too much refrigerant is
charged
Recover refrigerant.
Disconnect the manifold from
the liquid line.
You do not have to perform the
"Charging refrigerant (in
manual additional refrigerant
charge mode)" instructions.
The determined additional
refrigerant amount is not
reached yet
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Disconnect the manifold from
the liquid line.
Continue with the "Charging
refrigerant (in manual
additional refrigerant charge
mode)" instructions.
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Refrigerant charge port
Valve A
NOTICE
Connect as shown. Make sure that all outdoor unit stop valves,
as well as valve A are closed.
A
c
a
b
c
d
A
Pre-charging can be done without compressor operation, by
connecting the refrigerant bottle to the service port of the liquid stop
valve.
a
d
d
b
Pre-charging refrigerant
p<
p>
A
To speed up the refrigerant charging process, it is in case of larger
systems recommended to first pre-charge a portion of refrigerant
through the liquid line before proceeding with the manual charging. It
can be skipped, but charging will take longer then.
1
Connect as shown. Make sure valve A is closed.
Result: The unit will start operation.
INFORMATION
The manual refrigerant charge operation will automatically
stop within 30 minutes. If charging is not completed after
30 minutes, perform the additional refrigerant charging
operation again.
INFORMATION
▪ When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to "6.7.5 Error
codes when charging refrigerant" on page 24 and
solve the malfunction accordingly. Resetting the
malfunction can be done by pushing BS3. You can
restart the "Charging" instructions.
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
10 Open valve A.
11 Charge refrigerant until the remaining determined additional
refrigerant amount is added, and then close valve A.
12 Press BS3 to stop the manual additional refrigerant charge
mode.
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
Installer and user reference guide
23
6 Installation
a
NOTICE
After adding the refrigerant, do not forget to close the lid of
the refrigerant charging port. The tightening torque for the
lid is 11.5 to 13.9 N•m.
6.7.5
Error codes when charging refrigerant
c
d
b
a
b
g
g
INFORMATION
If a malfunction occurs, the error code is displayed on the
user interface of the indoor unit.
If a malfunction occurs, close valve A immediately. Confirm the
malfunction code and take corresponding action, "11.3 Solving
problems based on error codes" on page 38.
6.7.6
1
e
h
h
f
a
b
c
d
e
f
g
h
To fix the fluorinated greenhouse gases
label
Fill in the label as follows:
a
Contains fluorinated greenhouse gases
RXXX
f
1 =
kg
b
2 =
kg
c
1 + 2 =
kg
d
tCO2eq
e
GWP: XXX
2
1
GWP × kg
1000
a
b
c
d
e
f
=
If a multilingual fluorinated greenhouse gases label is
delivered with the unit (see accessories), peel off the
applicable language and stick it on top of a.
Factory refrigerant charge: see unit name plate
Additional refrigerant amount charged
Total refrigerant charge
Greenhouse gas emissions of the total refrigerant charge
expressed as tonnes CO2-equivalent
GWP = Global warming potential
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO2-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2
c
Fix the label on the inside of the outdoor unit. There is a
dedicated place for it on the wiring diagram label.
6.8
Connecting the electrical wiring
6.8.1
About connecting the electrical wiring
h
e
h
f
h
e
h
f
Field power supply (with earth leakage protector)
Main switch
Earth connection
Outdoor unit
Indoor unit
User interface
Power supply wiring (sheathed cable) (230 V)
Transmission wiring (sheathed cable) (16 V)
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
Power supply wiring and transmission wiring
It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wiring should always be at
least 50 mm.
NOTICE
▪ Be sure to keep the power line and transmission line
apart from each other. Transmission wiring and power
supply wiring may cross, but may not run parallel.
▪ Transmission wiring and power supply wiring may not
touch internal piping (except the inverter PCB cooling
pipe) in order to avoid wire damage due to high
temperature piping.
▪ Firmly close the lid and arrange the electrical wires so
as to prevent the lid or other parts from coming loose.
The transmission wiring outside the unit should be wrapped and
routed together with the field piping.
Branches
Maximum number of branches
for unit-to-unit cabling
Transmission wiring
9
Vinyl cords with 0.75 to 1.25 mm²
sheath or cables (2‑core wires)
Maximum wiring length
(= distance between outdoor and
furthest indoor unit)
Total wiring length
Typical workflow
Connecting the electrical wiring typically consists of the following
stages:
1
Making sure the power supply system complies with the
electrical specifications of the units.
2
3
4
Connecting the electrical wiring to the outdoor unit.
Connecting the electrical wiring to the indoor units.
Connecting the main power supply.
300 m
600 m
(= distance between outdoor and
all indoors)
If the total transmission wiring exceeds these limits, it may
result in communication error.
No branching is allowed after branching.
Field wiring: Overview
Field wiring consists of power supply (always including earth) and
indoor-outdoor communication (= transmission) wiring.
Example:
Installer and user reference guide
24
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
6 Installation
WARNING
A
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
C
b1
▪ Make sure all covers are closed before starting up the
unit.
b2
NOTICE
c1
Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
b3
NOTICE
c2
B
A
B
C
a
b1, b2, b3
c1, c2
If the power supply has a missing or wrong N-phase,
equipment will break down.
a
NOTICE
Outdoor unit
Indoor unit
Central user interface (etc...)
Main line
Branch lines
No branch is allowed after branch
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.
NOTICE
6.8.2
Precautions when connecting electrical
wiring
Never remove a thermistor, sensor, etc., when connecting
power wiring and transmission wiring. (If operated without
thermistor, sensor, etc., the compressor may break down.)
DANGER: RISK OF ELECTROCUTION
NOTICE
WARNING
▪ The reversed phase protection detector of this product
only functions when the product starts up.
Consequently reversed phase detection is not
performed during normal operation of the product.
All field wiring and components must be installed by a
licensed electrician and must comply with the applicable
legislation.
▪ The reversed phase protection detector is designed to
stop the product in the event of an abnormality when
the product is started up.
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
▪ Replace 2 of the 3 phases (L1, L2, and L3) during
reverse-phase protection abnormality.
6.8.3
Guidelines when knocking out knockout
holes
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
NOTICE
Precautions when making knockout holes:
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
▪ Avoid damaging the casing.
▪ After making the knockout holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ 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.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
▪ 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.
a
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
b
a
b
c
6.8.4
c
Knockout hole
Burr
Sealant etc.
Guidelines when connecting the electrical
wiring
Keep the following in mind:
Installer and user reference guide
25
6 Installation
X1M (A1P)
▪ If stranded conductor wires are being used, install a round crimpstyle terminal on the tip. Place the round crimp-style terminal on
the wire up to the covered part and fasten the terminal with the
appropriate tool.
b
TO IN/D
F1
F2
TO MULTI
UNIT
TO OUT/D
F1
F2
Q1
Q2
a
a
b
Stranded conductor wire
Round crimp-style terminal
a
▪ Use the following methods for installing wires:
Wire type
cb
A
AA´
A´
a
b
c
4
a
a
b
c Flat washer
a
B
F1 F2
F1 F2
F1 F2
Use the conductor of sheathed wire (2 wire) (no polarity)
Terminal board (field supply)
3N~50 Hz
380-415 V
L1 L2 L3
b Screw
cb
F1 F2
Connect the power supply as follows:
a
a Curled single core wire
Stranded conductor
wire with round
crimp-style terminal
F1 F2
b
Installation method
Single core wire
F1 F2
c
bc
B
L1 L2 L3 N
a
a
b
c
a Terminal
5
b Screw
X1M
Earth leakage circuit breaker
Fuse
Power supply cable
Fix the cables (power supply and transmission wiring) with
cable ties.
c Flat washer
Tightening torques
Wiring
Screw size
Tightening torque
(N•m)
Power supply wiring
M5
2.2~2.7
(power supply +
shielded ground)
Transmission wiring
6.8.5
X1M
(A1P)
X1M
M3.5
0.8~0.97
a
a
To connect the electrical wiring on the
outdoor unit
NOTICE
a
a
b
▪ Follow the wiring diagram (delivered with the unit,
located at the inside of the service cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
1
Remove the service cover. See "6.2.2 To open the outdoor
unit" on page 15.
2
Strip insulation (20 mm) from the wires.
a
Route the wiring through the frame and connect it to it.
Strip wire end to this point
Excessive strip length may cause electrical shock or
leakage.
Connect the transmission wiring as follows:
Installer and user reference guide
26
6
Cable tie
Attachment plate
Power supply
Transmission wiring
b
a
b
3
a
b
X1M
X1M (A1P)
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
7 Configuration
Routing through
the frame
6.9.2
Choose one of the 3 possibilities:
To close the outdoor unit
3
b
a
When closing the outdoor unit cover, make sure that the
tightening torque does NOT exceed 4.1 N•m.
b
a
2
1
NOTICE
b
a
a Power supply cable
b Transmission wiring cable
Connecting to the
frame
When cables are routed from the unit, a
protection sleeve for the conduits (PG
insertions) can be inserted at the knockout
hole.
When you do not use a wire conduit,
protect the wires with vinyl tubes to
prevent the edge of the knockout hole from
cutting the wires.
A B
a
bc
d
e
2×
7
Configuration
7.1
Overview: Configuration
This chapter describes what you have to do and know to configure
the system after it is installed.
It contains information about:
A Inside of the outdoor unit
▪ Making field settings
B Outside of the outdoor unit
▪ Energy saving and optimum operation
a Wire
INFORMATION
b Bush
d Frame
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
e Hose
DANGER: RISK OF ELECTROCUTION
c Nut
7
Reattach the service cover. See "6.9.2 To close the outdoor
unit" on page 27.
8
Connect an earth leakage circuit breaker and fuse to the power
supply line.
7.2
Making field settings
7.2.1
About making field settings
6.9
Finishing the outdoor unit
installation
To configure the heat pump system, you must give input to the
outdoor unit's main PCB (A1P). This involves the following field
setting components:
6.9.1
To finish the transmission wiring
▪ Push buttons to give input to the PCB
▪ A display to read feedback from the PCB
After installing the transmission wires inside the unit, wrap them
along with the on-site refrigerant pipes using finishing tape, as
shown in figure below.
a
c
b
e
d
Field settings are defined by their mode, setting and value. Example:
[2‑8]=4.
Mode 1 and 2
Mode
Mode 1
(monitoring
settings)
a
b
c
d
e
Description
Mode 1 can be used to monitor the current
situation of the outdoor unit. Some field setting
contents can be monitored as well.
Liquid pipe
Gas pipe
Insulator
Transmission wiring (F1/F2)
Finishing tape
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
27
7 Configuration
Mode
Display
Description
Mode 2
Mode 2 is used to change the field settings of
the system. Consulting the current field setting
value and changing the current field setting
value is possible.
(field settings)
In general, normal operation can be resumed
without special intervention after changing field
settings.
7‑LEDs display
H1P: Shows the mode
H2P~H7P: Shows the settings and values, represented in binary
code
H8P: NOT used for field settings, but used during initialisation
Example:
Some field settings are used for special
operation (e.g., 1 time operation, recovery/
vacuuming setting, manual adding refrigerant
setting, etc.). In such a case, it is required to
abort the special operation before normal
operation can restart. It will be indicated in
below explanations.
[H1P - 32 + 16 + 8 + 4 + 2 + 1]
Description
H1P H2P H3P H4P H5P H6P H7P
Default situation
(H1P OFF)
Mode 1
(H1P flashing)
To access the field setting components
7.2.2
Mode 2
(H1P ON)
See "6.2.2 To open the outdoor unit" on page 15.
Setting 8
0 + 0 + 8 + 0 + 0 + 0
Field setting components
7.2.3
(in mode 2)
(H2P~H7P = binary 8)
NOTICE
Value 4
0 + 0 + 0 + 4 + 0 + 0
The DIP switches (DS1 and/or DS2 on A1P) are not used.
Do NOT change the factory setting.
(in mode 2)
(H2P~H7P = binary 4)
The components to make field settings:
7.2.4
▪ Push buttons (BS1~BS5)
To access mode 1 or 2
After the units are turned ON, the display goes to its default
situation. From there, you can access mode 1 and mode 2.
▪ 7‑LEDs display (H1P~H7P)
▪ H8P: LED for indication during initialisation
Initialisation: default situation
NOTICE
A1P
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.
X1M
MODE
H1P
TEST:
HWL:
H2P
C/H SELECT
IND
MASTER SLAVE
L.N.O.P. DEMAND MULTI
H3P
H4P
H5P
BS1
BS2
BS3
BS4
BS5
MODE
SET
RETURN
TEST
RESET
ON (
H6P
H8P
H7P
) OFF ( ) Flashing (
Turn on the power supply of the outdoor unit and all indoor units.
When the communication between indoor units and outdoor unit is
established and normal, the display indication state will be as below
(default situation when shipped from factory).
a
)
Push buttons
Use the push buttons to make the field settings. Operate the push
buttons with an insulated stick (such as a closed ball-point pen) to
avoid touching of live parts.
10~12 min
b
c
Push buttons
BS1: MODE: For changing the set mode
BS2: SET: For field setting
BS3: RETURN: For field setting
a
b
c
Power ON
Default situation
LED indication when there is a malfunction
BS4: TEST: For test operation
If the default situation is not displayed after 10~12 minutes, check
the malfunction code on the indoor unit user interface. Solve the
malfunction code accordingly. First, check the communication wiring.
BS5: RESET: For resetting the address when the wiring is changed
or when an additional indoor unit is installed
Switching between modes
Display
Use BS1 to switch between the default situation, mode 1 and
mode 2.
The display gives feedback about the field settings, which are
defined as [Mode-Setting]=Value.
Installer and user reference guide
28
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
7 Configuration
#
B
B
[5
S1
S1
s]
b
Action
Button/display
1
Start from the default
situation.
2
Select mode 2.
BS1 [5 s]
3
Select setting 8.
BS2 [X×]
S1
B
B
S1
a
c
a
b
c
BS1
BS1 [5 s]
Default situation (H1P OFF)
Mode 1 (H1P flashing)
Mode 2 (H1P ON)
Press BS1.
Press BS1 for at least 5 s.
("X×" depends on the setting
that you want to select.)
(= binary 8)
4
INFORMATION
a: Display the current value.
If you get confused in the middle of the process, press BS1
to return to the default situation.
7.2.5
In mode 1 (and in default situation) you can read out some
information.
Action
2
Check the status of LED
H6P.
Button/display
d BS3 [1×]
d: Confirm. The system starts
operating according to the
setting.
You can read out the status of low noise operation as follows:
Make sure the LEDs are
showing the default situation.
c BS3 [1×]
c: Enter the value in the
system.
Example: 7‑LEDs display – Default situation
1
b BS2 [X×]
b: Change to 4. ("X×"
depends on the current
value, and the value that you
want to select.)
To use mode 1
#
a BS3 [1×]
Select value 4 (= 8°C).
5
BS1 [1×]
Quit mode 2.
(H1P OFF)
7.2.7
H6P OFF: Unit is currently
not operating under low noise
restrictions.
H6P ON: Unit is currently
operating under low noise
restrictions.
Example: 7‑LEDs display – Mode 1
#
Action
1
Start from the default
situation.
2
Select mode 1.
3
Select setting 5.
BS1 [1×]
BS2 [X×]
BS3 [1×]
(there are 8 indoor units
connected)
(= binary 8)
5
7.2.6
Quit mode 1.
You can read out the following information:
Value / Description
Shows the status of low noise operation.
OFF
Unit is currently not operating under low noise
restrictions.
ON
(= binary 5)
Display the value of setting 5.
7‑LEDs display – Default situation (H1P OFF)
Button/display
("X×" depends on the setting
that you want to select.)
4
In mode 1 (and in default situation) you can read out some
information.
H6P
You can read out setting [1‑5] (= the total number of connected
indoor units) as follows:
Mode 1 (and default situation): Monitoring
settings
BS1 [1×]
Unit is currently operating under low noise
restrictions.
Low noise operation reduces the sound generated by the
unit compared to nominal operating conditions.
Low noise operation can be set in mode 2. There are two
methods to activate low noise operation of the outdoor unit
system.
▪ The first method is to enable an automatic low noise
operation during night time by field setting. The unit will
operate at the selected low noise level during the
selected time frames.
▪ The second method is to enable low noise operation
based on an external input. For this operation an optional
accessory is required.
To use mode 2
In mode 2 you can make field settings to configure the system.
Example: 7‑LEDs display – Mode 2
You can change the value of setting [2‑8] (= Te target temperature
during cooling operation) to 4 (= 8°C) as follows:
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
29
7 Configuration
Value / Description
H7P
Setting
Shows the status of power consumption limitation operation.
Value / Description
(
)
[1‑5]
OFF
Unit is currently not operating under power
consumption limitations.
It can be convenient to check if
the total number of indoor units
which are installed match the
total number of indoor units
which are recognised by the
system. In case there is a
mismatch, it is advised to check
the communication wiring path
between outdoor and indoor units
(F1/F2 communication line).
Shows the total number of
connected indoor units.
ON
Unit is currently operating under power consumption
limitation.
Power consumption limitation reduces the power
consumption of the unit compared to nominal operating
conditions.
Power consumption limitation can be set in mode 2. There
are two methods to activate power consumption limitation of
the outdoor unit system.
▪ The first method is to enable a forced power consumption
limitation by field setting. The unit will always operate at
the selected power consumption limitation.
▪ The second method is to enable power consumption
limitation based on an external input. For this operation
an optional accessory is required.
[1‑14]
Shows the latest malfunction
code.
[1‑15]
Shows the 2nd last malfunction
code.
[1‑16]
Shows the 3rd last malfunction
code.
7‑LEDs display – Mode 1 (H1P flashing)
You can read out the following information:
When the latest malfunction
codes were reset by accident on
an indoor unit user interface, they
can be checked again through
this monitoring settings.
For the content or reason behind
the malfunction code see
"11.3 Solving problems based on
error codes" on page 38, where
most relevant malfunction codes
are explained. Detailed
information about malfunction
codes can be consulted in the
service manual of this unit.
To obtain more detailed
information about the malfunction
code, press BS2 up to 3 times.
7.2.8
Mode 2: Field settings
In mode 2 you can make field settings to configure the system.
For more information and advice about the impact of settings [2‑8], [2‑9], [2‑41] and [2‑42], see "7.3 Energy saving and optimum operation" on
page 32.
Setting
Value
Setting
Description
(=
binary)
[2‑8]
Auto
[2‑12]
6°C
Enable the low noise function
and/or power consumption
limitation via external control
adaptor (DTA104A61/62).
(= binary 3)
(default)
8°C
9°C
10°C
11°C
[2‑9]
Tc target temperature during
heating operation.
Description
(=
binary)
Te target temperature during
cooling operation.
Value
Auto
(= binary 1)
(default)
43°C
(= binary 4)
46°C
(= binary 2)
Deactivated.
(= binary 1)
(default)
Activated.
(= binary 2)
If the system needs to be
running under low noise
operation or under power
consumption limitation
conditions when an external
signal is sent to the unit, this
setting should be changed.
This setting will only be
effective when the optional
external control adaptor
(DTA104A61/62) is installed
in the indoor unit.
[2‑18]
Fan high static pressure
setting.
In order to increase the static
pressure the outdoor unit fan
is delivering, this setting
should be activated. For
details about this setting, see
technical specifications.
Installer and user reference guide
30
Deactivated.
(= binary 1)
(default)
Activated.
(= binary 2)
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
7 Configuration
Setting
Value
Setting
Description
(=
binary)
Deactivated.
Activated.
[2‑21]
To stop the manual
additional refrigerant
charge operation
(when the required
additional refrigerant
amount is charged),
push BS3. If this
function was not
aborted by pushing
BS3, the unit will stop
its operation after
30 minutes. If
30 minutes was not
sufficient to add the
needed refrigerant
amount, the function
can be reactivated by
changing the field
setting again.
Deactivated.
(= binary 1)
(default)
[2‑22]
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Low noise operation level via
the external control adaptor.
If the system needs to be
running under low noise
operation conditions when an
external signal is sent to the
unit, this setting defines the
level of low noise that will be
applied.
(default)
To stop the refrigerant
recovery/vacuuming
mode, push BS1. If it is
not pushed, the
system will remain in
refrigerant recovery/
vacuuming mode.
Deactivated
Level 1
Level 2
Level 3
Level
3<Level
2<Level 1
Level
3<Level
2<Level 1
Level 3
(= binary 4)
This setting will only be
effective when the optional
external control adaptor
(DTA104A61/62) is installed
and the setting [2‑12] was
activated.
[2‑26]
20h00
22h00
Low noise operation start
time.
This setting is used in
conjunction with setting
[2‑22].
(default)
24h00
(= binary 4)
[2‑27]
(default)
By changing this setting, you
activate the automatic low
noise operation function of
the unit and define the level
of operation. Depending on
the chosen level, the noise
level will be lowered. The
start and stop moments for
this function are defined
under setting [2‑26] and
[2‑27].
Level 1
6h00
7h00
Activated.
In order to achieve a free
(= binary 2)
pathway to reclaim refrigerant
out of the system or to
remove residual substances
or to vacuum the system it is
necessary to apply a setting
which will open required
valves in the refrigerant circuit
so the reclaim of refrigerant
or vacuuming process can be
done properly.
Automatic low noise setting
and level during night time.
[2‑25]
Level 2
(= binary 1)
(default)
In order to add the additional (= binary 2)
refrigerant charge amount in
a manual way (without
automatic refrigerant charging
functionality), following setting
should be applied.
Refrigerant recovery/
vacuuming mode.
Description
binary)
[2‑20]
Manual additional refrigerant
charge.
Value
(=
Low noise operation stop
time.
This setting is used in
conjunction with setting
[2‑22].
8h00
(= binary 4)
(default)
[2‑30]
60%
—
Power consumption limitation
level (step 1) via the external
control adaptor
(DTA104A61/62).
If the system needs to be
running under power
consumption limitation
conditions when an external
signal is sent to the unit, this
setting defines the level
power consumption limitation
that will be applied for step 1.
The level is according to the
table.
65%
70%
(= binary 2)
(default)
—
75%
80%
(= binary 4)
—
85%
—
90%
—
95%
Installer and user reference guide
31
7 Configuration
Setting
Value
7.3
Energy saving and optimum
operation
Description
(=
binary)
[2‑31]
30%
(= binary 1)
Power consumption limitation
level (step 2) via the external
control adaptor
(DTA104A61/62).
If the system needs to be
running under power
consumption limitation
conditions when an external
signal is sent to the unit, this
setting defines the level
power consumption limitation
that will be applied for step 2.
The level is according to the
table.
40%
(= binary 2)
(default)
50%
(= binary 4)
—
55%
Function not active.
(= binary 1)
(default)
Forced, all time, power
consumption limitation
Follows [2‑30] setting.
operation (no external control
adaptor is required to perform (= binary 2)
power consumption
Follows [2‑31] setting.
limitation).
(= binary 4)
If the system always needs to
be running under power
consumption limitation
conditions, this setting
activates and defines the
level power consumption
limitation that will be applied
continuously. The level is
according to the table.
[2‑41]
(= binary 1)
(default)
After changing this setting,
you have to power OFF the
system, wait for 20 s, and
then power ON again. If not,
the setting will not be
processed and malfunction
codes might occur.
(= binary 2)
(=
Cooling comfort setting.
VRV DX indoor units
installed
RA DX indoor units
installed
Eco
binary [2‑39]) (in case of
)
Mild
(default)
Quick
This setting is used in
conjunction with setting [2‑8].
Powerful
(=
Eco
binary [2‑43]) (in case of
)
Heating comfort setting.
This setting is used in
conjunction with setting [2‑9].
Several patterns are available and explained below. Modify the
parameters to the needs of your building and to realize the best
balance between energy consumption and comfort.
No matter which control is selected, variations on the behaviour of
the system are still possible due to protection controls to keep the
unit operating under reliable conditions. The intentional target,
however, is fixed and will be used to obtain the best balance
between energy consumption and comfort, depending on the
application type.
7.3.1
[2‑32]
Type of indoor units
This heat pump system is equipped with advanced energy saving
functionality. Depending on the priority, emphasises can be put on
energy saving or comfort level. Several parameters can be selected,
resulting in the optimal balance between energy consumption and
comfort for the particular application.
Mild
(default)
Quick
Powerful
Available main operation methods
Basic
The refrigerant temperature is fixed independent from the situation. It
corresponds to the standard operation which is known and can be
expected from/under previous VRV systems.
To activate this in…
Cooling operation
[2‑8]=2
Heating operation
[2‑9]=2
Automatic
The refrigerant temperature is set depending on the outdoor ambient
conditions. As such adjusting the refrigerant temperature to match
the required load (which is also related to the outdoor ambient
conditions).
E.g., when your system is operating in cooling, you do not need as
much cooling under low outdoor ambient temperatures (e.g., 25°C)
as under high outdoor ambient temperatures (e.g., 35°C). Using this
idea, the system automatically starts increasing its refrigerant
temperature, automatically reducing the delivered capacity and
increasing the system's efficiency.
E.g., when your system is operating in heating, you do not need as
much heating under high outdoor ambient temperatures (e.g., 15°C)
as under low outdoor ambient temperatures (e.g., –5°C). Using this
idea, the system automatically starts decreasing its refrigerant
temperature, automatically reducing the delivered capacity and
increasing the system's efficiency.
To activate this in…
[2‑8]=3 (default)
Heating operation
[2‑9]=1 (default)
Hi-sensible/economic (cooling/heating)
The refrigerant temperature is set higher/lower (cooling/heating)
compared to basic operation. The focus under high sensible mode is
comfort feeling for the customer.
The selection method of indoor units is important and has to be
considered as the available capacity is not the same as under basic
operation.
For details concerning to Hi-sensible applications, please contact
your dealer.
To activate this in…
32
Change…
Cooling operation
Cooling operation
Installer and user reference guide
Change…
Change…
[2‑8] to the appropriate value,
matching the requirements of the
pre-designed system containing
a high sensible solution.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
7 Configuration
To activate this in…
Heating operation
7.3.2
Change…
[2‑9] to the appropriate value,
matching the requirements of the
pre-designed system containing
a high sensible solution.
[2‑8]
Te target (°C)
4
8
5
9
6
10
7
11
[2‑9]
Tc target (°C)
4
43
Available comfort settings
For each of above modes a comfort level can be selected. The
comfort level is related to the timing and the effort (energy
consumption) which is put in achieving a certain room temperature
by temporarily changing the refrigerant temperature to different
values in order to achieve requested conditions more quickly.
Powerful
Overshoot (during heating operation) or undershoot (during cooling
operation) is allowed compared to the requested refrigerant
temperature, in order to achieve the required room temperature very
fast. The overshoot is allowed from the start up moment.
▪ In case of cooling operation the evaporating temperature is
allowed to go down to 3°C on temporary base depending on the
situation.
To activate this in…
Heating operation
Change…
[2‑43]=2
This setting is used in
conjunction with setting [2‑9].
Mild
Overshoot (during heating operation) or undershoot (during cooling
operation) is allowed compared to the requested refrigerant
temperature, in order to achieve the required room temperature very
fast. The overshoot is not allowed from the start up moment. The
start up occurs under the condition which is defined by the operation
mode above.
▪ In case of cooling operation the evaporating temperature is
allowed to go down to 6°C on temporary base depending on the
situation.
▪ In case of heating operation the condense temperature is allowed
to go up to 46°C on temporary base depending on the situation.
▪ When the request from the indoor units becomes more moderate,
the system will eventually go to the steady state condition which is
defined by the operation method above.
▪ The start up condition is different from the powerful and quick
comfort setting.
To activate this in…
Cooling operation
Change…
[2‑39]=1
This setting is used in
conjunction with setting [2‑8].
Heating operation
[2‑43]=1
This setting is used in
conjunction with setting [2‑9].
▪ In case of heating operation the condense temperature is allowed
to go up to 49°C on temporary base depending on the situation.
Eco
▪ When the request from the indoor units becomes more moderate,
the system will eventually go to the steady state condition which is
defined by the operation method above.
The original refrigerant temperature target, which is defined by the
operation method (see above) is kept without any correction, unless
for protection control.
To activate this in…
Cooling operation
Change…
To activate this in…
Cooling operation
[2‑39]=3
Heating operation
[2‑43]=3
This setting is used in
conjunction with setting [2‑9]
[2‑39]=0
This setting is used in
conjunction with setting [2‑8].
This setting is used in
conjunction with setting [2‑8].
Heating operation
Change…
[2‑43]=0
This setting is used in
conjunction with setting [2‑9].
Quick
Overshoot (during heating operation) or undershoot (during cooling
operation) is allowed compared to the requested refrigerant
temperature, in order to achieve the required room temperature very
fast. The overshoot is allowed from the start up moment.
▪ In case of cooling operation the evaporating temperature is
allowed to go down to 6°C on temporary base depending on the
situation.
▪ In case of heating operation the condense temperature is allowed
to go up to 46°C on temporary base depending on the situation.
▪ When the request from the indoor units becomes more moderate,
the system will eventually go to the steady state condition which is
defined by the operation method above.
To activate this in…
Cooling operation
Change…
[2‑39]=2
This setting is used in
conjunction with setting [2‑8].
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
33
7 Configuration
7.3.3
Example: Automatic mode during cooling
7.3.4
Example: Automatic mode during heating
E
E
100%
100%
A
B
A
70%
50%
B
Te
Tc
49°C
C
D
C
46°C
6°C
3°C
35°C
A
B
C
D
E
F
Te
F
D
Actual load curve
Virtual load curve (initial capacity automatic mode)
Virtual target value (initial evaporation temperature value
automatic mode)
Required evaporation temperature value
Load factor
Outside air temperature
Evaporating temperature
Quick
Powerful
Mild
2°C
A
B
C
D
E
F
Tc
Room temperature evolution:
F
Virtual load curve (default automatic mode peak capacity)
Load curve
Virtual target value (initial condensation temperature value
automatic mode)
Design temperature
Load factor
Outside air temperature
Condensing temperature
Quick
Powerful
Mild
Room temperature evolution:
A
D
F
E
F
E
D
A
B
C
A
B
C
D
E
F
Indoor unit set temperature
Operation start
Operating time
Mild
Quick
Powerful
Installer and user reference guide
34
B
C
A
B
C
D
E
F
Indoor unit set temperature
Operation start
Operating time
Mild
Quick
Powerful
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
8 Commissioning
8
8.1
Commissioning
Field wiring
Overview: Commissioning
Be sure that the field wiring has been carried out
according to the instructions described in the chapter
"6.8 Connecting the electrical wiring" on page 24,
according to the wiring diagrams and according to the
applicable legislation.
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run must be
performed according to the procedures described below.
Power supply voltage
This chapter describes what you have to do and know to
commission the system after it is configured.
Check the power supply voltage on the local supply panel.
The voltage must correspond to the voltage on the
identification label of the unit.
Commissioning typically consists of the following stages:
1
Checking the "Checklist before commissioning".
Earth wiring
2
3
4
8.2
Performing a test run.
If necessary, correcting errors after abnormal completion of the
test run.
Operating the system.
Precautions when commissioning
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
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
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a
voltage of 500 V DC between power terminals and earth.
Never use the megatester for the transmission wiring.
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or the locally
installed protection devices are of the size and type
specified in the chapter "5.4.2 Safety device
requirements" on page 15. Be sure that neither a fuse nor
a protection device has been bypassed.
Internal wiring
Visually check the electrical component box and the
inside of the unit on loose connections or damaged
electrical components.
Pipe size and pipe insulation
Be sure that correct pipe sizes are installed and that the
insulation work is properly executed.
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.
Stop valves
INFORMATION
Damaged equipment
During the first running period of the unit, the required
power may be higher than stated on the nameplate of the
unit. This phenomenon is caused by the compressor, that
needs a continuous run time of 50 hours before reaching
smooth operation and stable power consumption.
Check the inside of the unit on damaged components or
squeezed pipes.
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.
During test operation, the outdoor unit and the indoor units will start
up. Make sure that the preparations of all indoor units are finished
(field piping, electrical wiring, air purge, ...). See installation manual
of the indoor units for details.
8.3
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
Checklist before commissioning
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit must be closed, only then can
the unit be powered up.
You read the complete installation and operation
instructions, as described in the installer and user
reference guide.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Be sure that the stop valves are open on both liquid and
gas side.
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there
is a refrigerant leak, try to repair the leak. If the repair is
unsuccessful, call your local dealer. Do not touch any
refrigerant which has leaked out from refrigerant piping
connections. This may result in frostbite.
Oil leak
Check the compressor for oil leakage. If there is an oil
leak, try to repair the leak. If the repairing is unsuccessful,
call your local dealer.
Air inlet/outlet
Check that the air inlet and outlet of the unit is not
obstructed by paper sheets, cardboard, or any other
material.
Additional refrigerant charge
The amount of refrigerant to be added to the unit shall be
written on the included "Added refrigerant" plate and
attached to the rear side of the front cover.
Installation date and field setting
Be sure to keep record of the installation date on the
sticker on the rear of the front panel according to
EN60335‑2‑40 and keep record of the contents of the field
setting(s).
Installer and user reference guide
35
9 Hand-over to the user
8.4
Checklist during commissioning
4
Check the test operation results on the outdoor unit 7‑LEDs
display.
To perform a test run.
8.4.1
Completion
Description
Normal
completion
About test run
Abnormal
completion
The procedure below describes the test operation of the complete
system. This operation checks and judges following items:
▪ Check of wrong wiring (communication check with indoor units).
▪ Check of the stop valves opening.
Refer to "8.4.3 Correcting after abnormal
completion of the test run" on page 36 to take
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
▪ Judgement of piping length.
Make sure to carry out the system test operation after the first
installation. Otherwise, the malfunction code
will be displayed on
the user interface and normal operation or individual indoor unit test
run cannot be carried out.
Abnormalities on indoor units cannot be checked for each unit
separately. After the test operation is finished, check the indoor units
one by one by performing a normal operation using the user
interface. Refer to the indoor unit installation manual for more details
concerning the individual test run.
8.4.3
The test operation is only completed if there is no malfunction code
displayed. In case of a displayed malfunction code, perform
correcting actions as explained in the malfunction code table. Carry
out the test operation again and confirm that the abnormality is
properly corrected.
INFORMATION
If a malfunction occurs, the error code is displayed on the
user interface of the indoor unit.
INFORMATION
▪ It may take 10 minutes to achieve a uniform refrigerant
state before the compressor starts.
▪ During the test operation, the refrigerant running sound
or the magnetic sound of a solenoid valve may become
loud and the display indication may change. These are
not malfunctions.
8.4.2
1
2
To perform a test run (7-LEDs display)
Make sure all field settings you want are set; see "7.2 Making
field settings" on page 27.
Turn ON the power to the outdoor unit and the connected
indoor units.
Correcting after abnormal completion of
the test run
INFORMATION
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
8.4.4
Operating the unit
Once the unit is installed and test operation of outdoor unit and
indoor units is finished, the operation of the system can start.
For operating the indoor unit, the user interface of the indoor unit
should be switched ON. Refer to the indoor unit operation manual for
more details.
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.
3
Make sure the default (idle) situation is existing (H1P is OFF);
see "7.2.4 To access mode 1 or 2" on page 28. Push BS4 for 5
seconds or more. The unit will start test operation.
Result: The test operation is automatically carried out, the
outdoor unit H2P flashes and the indication "Test operation"
and "Under centralised control" will display on the user interface
of indoor units.
Steps during the automatic system test run procedure:
Step
9
Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation on the url as earlier described in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
▪ Show the user what to do in relation to maintaining the unit.
Description
Control before start up (pressure
equalisation)
10
Maintenance and service
Cooling start up control
NOTICE
Cooling stable condition
Maintenance must be done by an authorised installer or
service agent.
Communication check
Stop valve check
Pipe length check
Pump down operation
We recommend to do maintenance at least once a year.
However, applicable legislation might require shorter
maintenance intervals.
Unit stop
INFORMATION
During the test operation, it is not possible to stop the unit
operation from a user interface. To abort the operation,
press BS3. The unit will stop after ±30 seconds.
Installer and user reference guide
36
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
10 Maintenance and service
5
NOTICE
10.1
After the service is finished, plug the junction connector back in.
Otherwise the malfunction code
will be displayed and
normal operation will not be performed.
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO2-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
For details refer to the wiring diagram labelled on the back of the
service cover.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
Pay attention to the fan. It is dangerous to inspect the unit while the
fan is running. Make sure to turn off the main switch and to remove
the fuses from the control circuit located in the outdoor unit.
Overview: Maintenance and
service
10.3
Checklist for yearly maintenance
of the outdoor unit
This chapter contains information about:
Check the following at least once a year:
▪ Preventing electrical hazards when maintaining and servicing the
system
▪ Outdoor unit heat exchanger.
▪ The refrigerant recovery operation
10.2
Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
10.4
DANGER: RISK OF BURNING
Refrigerant recovery operation/vacuuming operation is possible by
applying setting [2‑21]. Refer to "7.2 Making field settings" on
page 27 for details how to set mode 2.
NOTICE: Risk of electrostatic discharge
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
10.2.1
The heat exchanger of the outdoor unit can get blocked up due to
dust, dirt, leaves, etc. It is recommended to clean the heat
exchanger yearly. A blocked heat exchanger can lead to too low
pressure or too high pressure leading to worse performance.
To prevent electrical hazards
When performing service to inverter equipment:
1
Do not open the electrical component box cover for 10 minutes
after the power supply is turned off.
2
Measure the voltage between terminals on the terminal block
for power supply with a tester and confirm that the power supply
is shut off. In addition, measure points as shown in the figure
below, with a tester and confirm that the voltage of the capacitor
in the main circuit is less than 50 V DC.
About service mode operation
When vacuuming/recovery mode is used, check very carefully what
should be vacuumed/recovered before starting. See installation
manual of the indoor unit for more information about vacuuming and
recovery.
10.4.1
1
To use vacuum mode
When the unit is at standstill, activate setting [2‑21] to start
vacuuming mode.
Result: When confirmed, the indoor and outdoor unit expansion
valves will fully open. At that moment H1P lights and the user
interface of all indoor units indicate TEST (test operation) and
(external control) and the operation will be prohibited.
2
Evacuate the system with a vacuum pump.
3
Press BS1 to stop vacuuming mode.
10.4.2
To recover refrigerant
This should be done by a refrigerant reclaimer. Follow the same
procedure as for vacuuming method.
DANGER: RISK OF EXPLOSION
A3P
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leakage in the refrigerant
circuit:
TP1 TP2
A3P
3
4
To prevent damaging the PCB, touch a non-coated metal part
to eliminate static electricity before pulling out or plugging in
connectors.
Pull out junction connectors for the fan motors in the outdoor
unit before starting service operation on the inverter equipment.
Be careful not to touch the live parts. (If a fan rotates due to
strong wind, it may store electricity in the capacitor or in the
main circuit and cause electric shock.)
Junction connectors
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit. Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
NOTICE
Make sure to NOT recover any oil while recovering
refrigerant. Example: By using an oil separator.
X1A, X2A for M1F
X3A, X4A for M2F
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
37
11 Troubleshooting
DANGER: RISK OF ELECTROCUTION
11
Troubleshooting
11.1
Overview: Troubleshooting
WARNING
Prevent hazard due to the inadvertent resetting of the
thermal cut-out: 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.
Before troubleshooting
Carry out a thorough visual inspection of the unit and look for
obvious defects such as loose connections or defective wiring.
11.2
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 bridge 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.
11.3.1
DANGER: RISK OF BURNING
Precautions when troubleshooting
11.3
Solving problems based on error
codes
In case of a displayed malfunction code, perform correcting actions
as explained in the malfunction code table.
After correcting the abnormality, press BS3 to reset the malfunction
code and retry operation.
INFORMATION
If a malfunction occurs, the error code is displayed on the
user interface of the indoor unit.
Error codes: Overview
Main code
Cause
Solution
▪ The stop valve of an outdoor unit is left closed.
▪ Open the stop valve on both the gas and liquid side.
▪ Refrigerant overcharge
▪ Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge level by
recovering any excessive refrigerant with a refrigerant
recovery machine.
▪ The stop valve of an outdoor unit is left closed.
▪ Open the stop valve on both the gas and liquid side.
▪ Insufficient refrigerant
▪ Check if the additional refrigerant charge has been
finished correctly. Recalculate the required amount of
refrigerant from the piping length and add an adequate
amount of refrigerant.
Electronic expansion valve malfunction
Check connection on PCB or actuator.
(Y1E) - A1P (X21A)
(Y2E) - A1P (X23A)
▪ The stop valve of an outdoor unit is left closed.
▪ Open the stop valve on both the gas and liquid side.
▪ Insufficient refrigerant
▪ Check if the additional refrigerant charge has been
finished correctly. Recalculate the required amount of
refrigerant from the piping length and add an adequate
amount of refrigerant.
Refrigerant overcharge
Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge level by
recovering any excessive refrigerant with a refrigerant
recovery machine.
Ambient temperature sensor malfunction (R1T) - A1P
(X18A)
Check connection on PCB or actuator.
Discharge temperature sensor malfunction (R3T): open
circuit / short circuit - A1P (X29A)
Check connection on PCB or actuator.
Suction temperature sensor malfunction
Check connection on PCB or actuator.
(R2T) - A1P (X30A)
(R7T) - A1P (X30A)
Liquid temperature sensor (after subcool HE) malfunction
(R6T) - A1P (X30A)
Check connection on PCB or actuator.
Liquid temperature sensor (coil) malfunction (R4T) - A1P
(X30A)
Check connection on PCB or actuator.
Gas temperature sensor (after subcool HE) malfunction
(R5T) - A1P (X30A)
Check connection on PCB or actuator.
Installer and user reference guide
38
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
12 Disposal
Main code
Cause
Solution
High pressure sensor malfunction (S1NPH): open circuit /
short circuit - A1P (X32A)
Check connection on PCB or actuator.
Low pressure sensor malfunction (S1NPL): open circuit /
short circuit - A1P (X31A)
Check connection on PCB or actuator.
Transmission outdoor unit - inverter: INV1 / FAN1 / FAN2
transmission trouble - A1P (X20A, X28A)
Check connection.
INV1 unbalanced power supply voltage
Check if power supply is within range.
Reversed power supply phase malfunction
Correct phase order.
Insufficient supply voltage
Check if the supply voltage is supplied properly.
Malfunction code: System test run not yet executed (system Execute system test run.
operation not possible)
No power is supplied to the outdoor unit.
Check if the power wiring for the outdoor unit is connected
correctly.
Faulty wiring to Q1/Q2
Check Q1/Q2 wiring.
System mismatch. Wrong type of indoor units combined
(R410A, R407C, RA, etc)
Check if other indoor units have malfunction and confirm
indoor unit mix is allowed.
Indoor unit malfunction
Improper type of indoor units are connected.
Check the type of indoor units that are currently connected.
If they are not proper, replace them with proper ones.
Incorrect interconnections between units.
Connect interconnections F1 and F2 of the connected BP
unit correctly to the outdoor unit's PCB (TO BP UNIT). Make
sure that the communication with the BP unit is enabled.
▪ The stop valve of an outdoor unit is left closed.
▪ Open the stop valve on both the gas and liquid side.
▪ The piping and wiring of the specified indoor unit are not ▪ Confirm that the piping and wiring of the specified indoor
connected correctly to the outdoor unit.
unit are connected correctly to the outdoor unit.
12
Disposal
Dismantling of the unit, and treatment of the refrigerant, oil and other
parts must comply with the applicable legislation.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
39
13 Technical data
13
Technical data
A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of latest technical data is
available on the Daikin extranet (authentication required).
13.1
Overview: Technical data
This chapter contains information about:
• Dimensions
• Service space
• Components
• Piping diagram
• Wiring diagram
13.2
Dimensions: Outdoor unit
(dimensions in mm)
320
30
44
350
(345~355)
48
61
30
j
96
160
620
30
160
940
c
1430
e
d
a
b
19
142
a
b
c
d
e
f
g
h
i
j
395
191
52
13
67
3D068441G
95
223
84
Gas pipe connection (Ø19.1 brazing)
Liquid pipe connection (Ø9.5 brazing)
Service port (high pressure) (in the unit)
Service port (refrigerant charge) (in the unit)
Earthing terminal M5 (in the switch box)
Refrigerant piping intake
Power supply wiring intake (knockout hole Ø34)
Transmission wiring intake (knockout hole Ø27)
Drain pipe connection (OD Ø26)
Anchor point (bolt 4× M12)
Installer and user reference guide
40
16
f
68 67
47
145
g
16
i
80
g
f
68
i
151
i
90
19
55
55
h
53
89
95
f
54
f
95
h
54
60
89
g
h
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
13 Technical data
13.3
Service space: Outdoor unit
Outdoor unit:
• When mounting units side by side, the piping route must be to the front, to the back or downwards. In this case the piping route to the side is
not possible.
• When mounting the units side by side and routing the piping to the back, you must keep a distance of ≥250 mm between the units (instead of
≥100 mm as shown on the figures below).
) | Single row of units (
Single unit (
)
A~E
eB
E
eD
e
HU
C
c
b
d
D
B
a
HD
HB
e
≥100
b
A,B,C,D
E
a,b,c,d,e
eB
eD
HU
HB,HD
1
2
e
eB
eD
A, B, C
—
≥100 ≥100 ≥100
B, E
—
≥100
≥1000
≤500
A, B, C, E
—
≥150 ≥150 ≥150
≥1000
≤500
D
—
D, E
—
B, D
—
B, D, E
HB<HD
≥500
≥1000 ≥1000 ≤500
≥100
≥1000
HB≤½HU
≥250
≥1000 ≥1000 ≤500
½HU<HB≤HU
≥250
≥1250 ≥1000 ≤500
HD≤½HU
≥100
≥1000 ≥1000
≤500
½HU<HD≤HU
≥200
≥1000 ≥1000
≤500
HD>HU
≥200
≥1700 ≥1000
≤500
≥1000
≤500
B
A, B, C
—
≥200 ≥300 ≥1000
A, B, C, E
—
≥200 ≥300 ≥1000
D
—
D, E
—
B, D
HD>HU
≥300
≥1000
HD≤½HU
≥250
≥1500
½HU<HD≤HU
≥300
≥1500
HB<HD
HB≤½HU
≥300
≥1000 ≥1000 ≤500
½HU<HB≤HU
≥300
≥1250 ≥1000 ≤500
HD≤½HU
≥250
≥1500 ≥1000
≤500
½HU<HD≤HU
≥300
≥1500 ≥1000
≤500
HD>HU
≥300
≥2200 ≥1000
≤500
HB
d
HD
d
≥100
B, D, E
D
c
—
A
E
HU
c
b
HB>HU
≥100
C
(mm)
a
B
HB>HD
eB
eD
HB HD HU
a
≥1000
≥1000 ≥1000 ≤500
HB>HU
A
HB>HD
1
1+2
Obstacles (walls/baffle plates)
Obstacle (roof)
Minimum service space between the unit and obstacles A, B, C, D and E
Maximum distance between the unit and the edge of obstacle E, in the direction of obstacle B
Maximum distance between the unit and the edge of obstacle E, in the direction of obstacle D
Height of the unit
Height of obstacles B and D
Seal the bottom of the installation frame to prevent discharged air from flowing back to the suction side through the bottom of the unit.
Maximum two units can be installed.
Not allowed
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
41
13 Technical data
Multiple rows of units (
)
≥100
≥100
≥100
≥100
≥100
Stacked units (max. 2 levels) (
A1
≥100
b (mm)
b≥250
½HU<HB≤HU
b≥300
HB>HU
HB
b
≥2000
≥200
≥1000
HB HU
HB≤½HU
≥100
≥3000
HU
≥600
≥1500
)
A2
≥100
≥100
A2
A2
≥300
≥1000
B1
B2
≥100
≥100
B2
B2
≥100
≥100
≥300
≥1000
A1=>A2
B1=>B2
(A1) If there is danger of drainage dripping and freezing between the upper and lower units…
(A2) Then install a roof between the upper and lower units. Install the upper unit high enough above the lower unit to prevent ice buildup at the
upper unit's bottom plate.
(B1) If there is no danger of drainage dripping and freezing between the upper and lower units…
(B2) Then it is not required to install a roof, but seal the gap between the upper and lower units to prevent discharged air from flowing back to the
suction side through the bottom of the unit.
Installer and user reference guide
42
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
13 Technical data
13.4
Components: Outdoor unit
a
k
M1F
M2F
b
Y3S
c
Y1S
A1P
X1M (A1P)
d
X1M
h
i
S1PH
j
e
f
g
Y1E
h
Y2E
M1C
a
b
c
d
e
f
g
h
i
j
k
A1P
M1C
M1F-M2F
S1PH
X1M
X1M (A1P)
Y1E
Y2E
Heat exchanger
Service port (high pressure)
Oil separator
Switch box
Service port (refrigerant charge)
Stop valve (gas)
Stop valve (liquid)
Cable tie mountings (to fix the field wiring with cable ties to
ensure stress relief)
Subcool heat exchanger
Accumulator
Fan
Printed circuit board (main)
Motor (compressor)
Motor (upper and lower fan)
High pressure switch
Terminal strip (power supply wiring)
Terminal strip (transmission wiring)
Electronic expansion valve (main)
Electronic expansion valve (subcool heat exchanger)
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Y1S
Y3S
Solenoid valve (oil)
Solenoid valve (4‑way valve)
Installer and user reference guide
43
13 Technical data
13.5
Piping diagram: Outdoor unit
Y1E
R1T
R5T
Y2E
e
c
f
R4T
M1F
c
R7T
h
d
g
M2F
Y3S
R6T
i
Y1S
S1NPH
c
S1PH
R3T
S1NPL
b
INV M1C
R2T
j
a
k
a
b
c
d
e
f
g
h
i
j
k
M1C
M1F-M2F
R1T
R2T
R3T
R4T
R5T
R6T
R7T
S1NPH
S1NPL
S1PH
Y1E
Y2E
Y1S
Y3S
c
j
Stop valve (gas)
Stop valve (liquid)
Filter (4×)
Accumulator
Subcool tube heat exchanger
Pressure regulating valve
Heat exchanger
Service port (high pressure)
Oil separator
Capillary tube (2×)
Service port (refrigerant charge)
Compressor
Fan motor
Thermistor (air)
Thermistor (suction 1)
Thermistor (discharge)
Thermistor (heat exchanger de-icer)
Thermistor (subcool heat exchanger)
Thermistor (liquid pipe)
Thermistor (suction 2)
High pressure sensor
Low pressure sensor
High pressure switch
Electronic expansion valve (main)
Electronic expansion valve (subcool heat exchanger)
Solenoid valve
Solenoid valve (4‑way valve)
Heating
Cooling
Installer and user reference guide
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RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
13 Technical data
13.6
Wiring diagram: Outdoor unit
The wiring diagram is delivered with the unit, located at the inside of
the service cover.
3N~ 380-415 V 50 Hz
L1 L2 L3 N
A1P
GRN/
YLW
Z3C
N=1
A3P
L1B L2B L3B
+
P1
WHT
L1R
WHT
P2
-
X403A
Z4C
N=2
X1A
K2M
V1R
R95
C67 C32
PS
BLK
RED
WHT
K7R
X29A
1
X61A
X6A
t°
t°
t° R1T
S1NPL
X31A
IS THE COLOR OF COMPONENT CONNECTOR
t°
S1NPH
X32A
X21A
X30A
X1M
TO IN/D
F1
F2
TO OUT/D
F1
F2
TO MULTI
UNIT
Q1
Q2
X23A BLU
5
Y1E
M
5
Y2E
M
WHT MARK:BLU
X20A
Note 5
BLK
RED
P11 N1
N11
F101U R24
+
X3A
A4P
1
t°
HAP
X18A
IS THE COLOR OF PRINT CONNECTOR
X66A
X28A
X4A
X41A
t°
Z8C
N=1
X5A
M1C
t°
V1CP
X5A
MS
3~
BS1 BS2 BS3 BS4 BS5
ON DS1
OFF
E1HC
Y3S
R2T R4T R5T R6T R7T
Y1S
R3T
X4A
P1
U V W
X11A
X2A
X402A
R3 R2
V1R
X9A
H1P H2P H3P H4P H5P H6P H7P H8P
1234
+ +
-
X7A
PS
X3A
Z5C
HAP N3 N=1BLK
RED
P3
U V W
Z6C
N=5
BLK
BLU
WHT
F400U
K3R
K1R
+
P>
Z1F
BLK
RED
WHT
L1B L2B L3B
E L2A NA L3A
F411U F412U
S1PH
A2P
-
X3A
V1R X4A
X2A
X1A
5
RED
X1A
WHT
MARK:
RED
P1
X5A
HAP
MS
3~
M1F
5
A5P
P11 N1
N11
F101U R24
+
-
Z7C
N=1
RED
X2A
RED
X3A
WHT
WHT
5
MS
3~
MARK:
RED
M2F
5
OUTDOOR
(F1)(F2)
INDOOR
(F1)(F2)
HAP
V1R
X2A
X1A
RED
WHT
BLK
F410U
F1U
F2U Q1RP
RED
WHT
BLK
BLK
BLU
RED
WHT
X1M L1 L2 L3 N
RED
Z1C
N=1 L1A
GRN
N=2
X1A
K5R
RED
BLU
BLK
K3R
Z2C N=1
X4A
LAYOUT OF M1F,M2F,M1C,L1R,
EL, COMPO. BOX
DETAIL OF EL. COMPO. BOX
A2P
RED
X4A
A4P
A1P
WHT
A2P
A5P
A3P
X1M
FRONT
M1F
ARROW VIEW
M2F
L1R
(WHT)
TERMINAL
OF M1C
U
EL,
COMPO.
BOX
W
V
M1C
OUTER SHELL
2D094434-1
Notes:
BRN
Brown
1
This wiring diagram applies only to the outdoor unit.
GRN
Green
2
Symbols (see below).
ORG
Orange
3
Symbols (see below).
RED
Red
4
Refer to the installation manual for connection wiring to
INDOOR-OUTDOOR transmission F1-F2 and OUTDOOROUTDOOR transmission F1-F2.
WHT
White
YLW
Yellow
Legend for wiring diagram:
5
Refer to the installation manual for how to use the BS1~BS5
and DS1 switches.
A1P
Printed circuit board (main)
6
When operating, do not short-circuit protective device S1PH.
A2P
Printed circuit board (noise filter)
7
Colours (see below).
A3P
Printed circuit board (inverter)
A4P
Printed circuit board (fan 1)
A5P
Printed circuit board (fan 2)
BS1~BS5
Push button switch
C32, C67
Capacitor
DS1
DIP switch
E1HC
Crankcase heater
F1U, F2U
Fuse (T 3.15 A / 250 V) (A1P)
F101U
Fuse (5 A, DC650 V) (A4P) (A5P)
F400U
Fuse (T 6.3 A / 250 V) (A2P)
H1P~H8P
Light‑emitting diode (service monitor orange)
Symbols:
L
N
Live
Neutral
Field wiring
Terminal strip
Connector
Fixed connector
Movable connector
Protective earth (screw)
Noiseless earth
H2P:
Terminal
▪ Prepare, test: Flickering
Colours:
▪ Malfunction detection: Light up
BLK
Black
HAP
Light-emitting diode (service monitor is green)
BLU
Blue
K1R
Magnetic relay (A3P)
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
45
13 Technical data
K2M
Magnetic contactor (M1C) (A3P)
K3R
Magnetic relay (A2P)
K3R
Magnetic relay (Y1S)
K5R
Magnetic relay (Y3S)
K7R
Magnetic relay (E1HC)
L1R
Reactor
M1C
Motor (compressor)
M1F, M2F
Motor (upper and lower fan)
PS
Switching power supply (A1P) (A3P)
Q1RP
Reverse phase protector
R2, R3
Resistor
R24
Resistor (current sensor) (A4P) (A5P)
R95
Resistor (current limiting)
R1T
Thermistor (air)
R2T
Thermistor (suction 1)
R3T
Thermistor (discharge)
R4T
Thermistor (heat exchanger de-icer)
R5T
Thermistor (subcool heat exchanger)
R6T
Thermistor (liquid pipe)
R7T
Thermistor (suction 2)
S1NPH
High pressure sensor
S1NPL
Low pressure sensor
S1PH
High pressure switch
V1CP
Safety devices input
V1R
IGBT module (A4P) (A5P)
V1R
Diode bridge IGBT module (A3P)
X1A, X2A
Connector (M1F)
X3A, X4A
Connector (M2F)
X1M
Terminal strip (power supply)
X1M
Terminal strip (control) (A1P)
Y1E
Electronic expansion valve (main)
Y2E
Electronic expansion valve (subcool heat exchanger)
Y1S
Solenoid valve
Y3S
Solenoid valve (4‑way valve)
Z1C~Z8C
Noise filter (ferrite core)
Z1F
Noise filter (with surge absorber)
Installer and user reference guide
46
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
14 About the system
For the user
14
About the system
15
The indoor unit part of VRV IV-S 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.
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.
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 VRV DX and RA DX indoor units is not
allowed.
User interface
This operation manual will give 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.
16
Before operation
WARNING
▪ Combination of RA DX and AHU indoor units is not
allowed.
This unit contains electrical and hot parts.
WARNING
▪ Combination of RA DX and aircurtain indoor units is not
allowed.
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
In general following type of indoor units can be connected to a VRV
IV-S heat pump system (not exhaustive list, depending on outdoor
unit model and indoor unit model combinations):
CAUTION
It is not good for your health to expose your body to the air
flow for a long time.
▪ VRV direct expansion indoor units (air to air applications).
▪ RA direct expansion indoor units (air to air applications).
CAUTION
▪ AHU (air to air applications): EKEXV-kit is required.
▪ Aircurtain -Biddle- (air to air applications).
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
Airhandling unit connection in pair to VRV IV-S heat pump outdoor
unit is supported.
CAUTION
Airhandling unit connection in multi to VRV IV-S heat pump outdoor
unit is supported, even combined with VRV direct expansion indoor
unit(s).
Do not operate the system when using a room fumigationtype insecticide. This could cause the chemicals to
become deposited in the unit, which could endanger the
health of those who are hypersensitive to chemicals.
For more specifications, see technical engineering data.
14.1
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.
System layout
a
Operation modes (depending on indoor unit type):
b
c
c
e
f
d
a
b
c
d
e
f
g
d
▪ Heating and cooling (air to air).
e
▪ Fan only operation (air to air).
f
g
Dedicated functions exist depending on the type of indoor unit, refer
to dedicated installation/operation manual for more information.
g
VRV IV-S Heat pump outdoor unit
Refrigerant piping
VRV direct expansion (DX) indoor unit
User interface (dedicated depending on indoor unit type)
BP box (required to connect Residential Air (RA) or Sky Air
(SA) direct expansion (DX) indoor units)
Residential Air (RA) direct expansion (DX) indoor units
User interface (wireless, dedicated depending on indoor
unit type)
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
17
Operation
17.1
Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
Installer and user reference guide
47
17 Operation
Cooling
Outdoor
temperature
Heating
–5~46°C DB
–20~21°C DB
–20~15.5°C WB
Indoor
temperature
21~32°C DB
15~27°C DB
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.
14~25°C WB
INFORMATION
≤80%(a)
Indoor humidity
Above operation range is only valid in case direct expansion indoor
units are connected to the VRV IV-S system.
▪ 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.
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.
▪ 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.
(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.
17.2
Operating the system
17.2.1
About operating the system
▪ 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.
▪ 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.
17.2.4
1
Press the operation mode selector button on the user interface
several times and select the operation mode of your choice.
Cooling operation
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
17.2.2
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 "17.5.1 About setting the master user
interface" on page 49.
▪ 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.
17.2.3
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.
Heating operation
Fan only operation
2
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 displays
.
Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.
17.3
Using the dry program
17.3.1
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).
17.3.2
To use the dry program
To start
1
Press the operation mode selector button on the user interface
several times and select
(program dry operation).
2
Press the ON/OFF button of the user interface.
Defrost operation
In heating operation, freezing of the outdoor unit's air cooled coil
increases over time, restricting the energy transfer to the outdoor
unit's coil. Heating capability decreases and the system needs to go
into defrost operation to be able to deliver enough heat to the indoor
units.
To operate the system
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 "17.4 Adjusting the air flow direction" on page 49 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.
Installer and user reference guide
48
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VRV IV-S system air conditioner
4P482257-1 – 2017.03
17 Operation
17.4
e
Adjusting the air flow direction
f
g
Refer to the operation manual of the user interface.
17.4.1
About the air flow flap
Double flow+multi-flow units
When the system is installed as shown in the figure above, it is
necessary to designate one of the user interfaces as the master user
interface.
The displays of slave user interfaces show
(change-over
under centralised control) and slave user interfaces automatically
follow the operation mode directed by the master user interface.
Corner units
Ceiling suspended units
Wall-mounted units
Only the master user interface can select heating or cooling mode.
17.5.2
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
Heating
▪ When the room temperature is ▪ When starting operation.
lower
than
the
set
▪ When the room temperature is
temperature.
higher
than
the
set
temperature.
▪ At defrost operation.
▪ When operating continuously at horizontal air flow direction.
Press the operation mode selector button of the current master
user interface for 4 seconds. In case this procedure was not yet
performed, the procedure can be executed on the first user
interface operated.
Result: The display showing
(change-over under
centralised control) of all slave user interfaces connected to the
same outdoor unit flashes.
2
▪ 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.
Press the operation mode selector button of the controller that
you wish to designate as the master user interface.
Result: Designation is completed. This user interface is
designated as the master user interface and the display
showing
(change-over under centralised control)
vanishes. The displays of other user interfaces show
(change-over under centralised control).
The air flow direction can be adjusted in one of the following ways:
▪ The air flow flap itself adjusts its position.
17.5.3
▪ The air flow direction can be fixed by the user.
and desired position
To designate the master user interface
(RA DX)
In case only RA DX indoor units are connected to the VRV IV-S
system:
.
WARNING
Never touch the air outlet or the horizontal blades while the
swing flap is in operation. Fingers may become caught or
the unit may break down.
NOTICE
1
Stop all indoor units.
2
When the system is not operating (all indoor units thermo OFF),
you can define the master RA DX indoor unit by addressing that
unit with infrared user interface (instruct thermo ON in desired
mode).
▪ The movable limit of the flap is changeable. Contact
your dealer for details. (only for double-flow, multi-flow,
corner, ceiling-suspended and wall-mounted).
The only way to change the master unit is by repeating the previous
procedure. A cool/heat switchover (or opposite) is only possible by
changing the operation mode of the defined master indoor unit.
. It may
▪ Avoid operating in the horizontal direction
cause dew or dust to settle on the ceiling or flap.
17.5.4
17.5
Setting the master user interface
17.5.1
About setting the master user interface
a
b
To designate the master user interface
(VRV DX)
In case only VRV DX indoor units are connected to the VRV IV-S
system:
1
Cooling
▪ Automatic
BP box (required to connect Residential Air (RA) or Sky Air
(SA) direct expansion (DX) indoor units)
Residential Air (RA) direct expansion (DX) indoor units
User interface (wireless, dedicated depending on indoor
unit type)
c
c
e
a
b
c
d
d
f
Type
g
Description
Group control system
1 user interface controls up to 16 indoor
units. All indoor units are equally set.
2 user interface control
system
2 user interfaces control 1 indoor unit (in
case of group control system, 1 group of
indoor units). The unit is individually
operated.
NOTICE
g
VRV IV-S Heat pump outdoor unit
Refrigerant piping
VRV direct expansion (DX) indoor unit
User interface (dedicated depending on indoor unit type)
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
This system provides two other control systems beside individual
control system (one user interface controls one indoor unit). Confirm
the following if your unit is of the following control system type:
e
f
d
About control systems
Contact your dealer in case of changing the combination or
setting of group control and 2 user interface control
systems.
Installer and user reference guide
49
18 Energy saving and optimum operation
18
Energy saving and optimum
operation
Observe the following precautions to ensure the system operates
properly.
▪ Adjust the air outlet properly and avoid direct air flow to room
inhabitants.
▪ Adjust the room temperature properly for a
environment. Avoid excessive heating or cooling.
comfortable
▪ Prevent direct sunlight from entering a room during cooling
operation by using curtains or blinds.
▪ Ventilate often. Extended use requires special attention to
ventilation.
▪ Keep doors and windows closed. If the doors and windows remain
open, air will flow out of your room causing a decrease in the
cooling or heating effect.
▪ Be careful not to cool or heat too much. To save energy, keep the
temperature setting at a moderate level.
▪ Never place objects near the air inlet or the air outlet of the unit. It
may cause deterioration in the effect or stop the operation.
idea, the system automatically starts increasing its refrigerant
temperature, automatically reducing the delivered capacity and
increasing the system's efficiency.
Hi-sensible/economic (cooling/heating)
The refrigerant temperature is set higher/lower (cooling/heating)
compared to basic operation. The focus under high sensible mode is
comfort feeling for the customer.
The selection method of indoor units is important and has to be
considered as the available capacity is not the same as under basic
operation.
For details concerning to Hi-sensible applications, please contact
your installer.
18.2
For each of above modes a comfort level can be selected. The
comfort level is related to the timing and the effort (energy
consumption) which is put in achieving a certain room temperature
by temporarily changing the refrigerant temperature to different
values in order to achieve requested conditions more quickly.
▪ Powerful
▪ Turn off the main power supply switch to the unit when the unit is
not used for longer periods of time. If the switch is on, it consumes
electricity. Before restarting the unit, turn on the main power
supply switch 6 hours before operation to ensure smooth running.
(Refer to "Maintenance" in the indoor unit manual.)
▪ Quick
▪ When the display shows
(time to clean the air filter), ask a
qualified service person to clean the filters. (Refer to
"Maintenance" in the indoor unit manual.)
19
▪ Keep the indoor unit and user interface at least 1 m away from
televisions, radios, stereos, and other similar equipment. Failing to
do so may cause static or distorted pictures.
▪ Do not place items under the indoor unit, they may be damaged
by water.
▪ Condensation may form if the humidity is above 80% or if the
drain outlet gets blocked.
This heat pump system is equipped with advanced energy saving
functionality. Depending on the priority, emphasises can be put on
energy saving or comfort level. Several parameters can be selected,
resulting in the optimal balance between energy consumption and
comfort for the particular application.
Several patterns are available and roughly explained below. Contact
your installer or dealer for advice or to modify the parameters to the
needs of your building.
Detailed information is given for the installer in the installation
manual. He can help you to realize the best balance between energy
consumption and comfort.
18.1
Available main operation methods
Basic
The refrigerant temperature is fixed independent from the situation. It
corresponds to the standard operation which is known and can be
expected from/under previous VRV systems.
Automatic
The refrigerant temperature is set depending on the outdoor ambient
conditions. As such adjusting the refrigerant temperature to match
the required load (which is also related to the outdoor ambient
conditions).
Available comfort settings
▪ Mild
▪ Eco
Maintenance and service
NOTICE
Never inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
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.
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.
NOTICE
Do not wipe the controller operation panel with benzine,
thinner, chemical dust cloth, etc. The panel may get
discoloured or the coating peeled off. If it is heavily dirty,
soak a cloth in water-diluted neutral detergent, squeeze it
well and wipe the panel clean. Wipe it with another dry
cloth.
E.g., when your system is operating in cooling, you do not need as
much cooling under low outdoor ambient temperatures (e.g., 25°C)
as under high outdoor ambient temperatures (e.g., 35°C). Using this
Installer and user reference guide
50
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4P482257-1 – 2017.03
19 Maintenance and service
19.1
Maintenance after a long stop
period
E.g., at the beginning of the season.
▪ Check and remove everything that might be blocking inlet and
outlet vents of indoor units and outdoor units.
▪ Clean air filters and casings of indoor units. Contact your installer
or maintenance person to clean air filters and casings of the
indoor unit. Maintenance tips and procedures for cleaning are
provided in the installation/operation manuals of dedicated indoor
units. Make sure to install cleaned air filters back in the same
position.
▪ Turn on the power at least 6 hours before operating the unit in
order to ensure smoother operation. As soon as the power is
turned on, the user interface display appears.
19.2
Maintenance before a long stop
period
E.g., at the end of the season.
▪ Let the indoor units run in fan only operation for about half a day in
order to dry the interior of the units. Refer to "17.2.2 About
cooling, heating, fan only, and automatic operation" on page 48
for details on fan only operation.
▪ Turn off the power. The user interface display disappears.
▪ Clean air filters and casings of indoor units. Contact your installer
or maintenance person to clean air filters and casings of the
indoor unit. Maintenance tips and procedures for cleaning are
provided in the installation/operation manuals of dedicated indoor
units. Make sure to install cleaned air filters back in the same
position.
19.3
19.4
After-sales service and warranty
19.4.1
Warranty period
▪ This product includes a warranty card that was filled in by the
dealer at the time of installation. The completed card has to be
checked by the customer and stored carefully.
▪ If repairs to the product are necessary within the warranty period,
contact your dealer and keep the warranty card at hand.
19.4.2
Since dust collects when using the unit for several years,
performance of the unit will deteriorate to some extent. As taking
apart and cleaning interiors of units requires technical expertise and
in order to ensure the best possible maintenance of your units, we
recommend to enter into a maintenance and inspection contract on
top of normal maintenance activities. Our network of dealers has
access to a permanent stock of essential components in order to
keep your unit in operation as long as possible. Contact your dealer
for more information.
When asking your dealer for an intervention, always state:
▪ The complete model name of the unit.
▪ The manufacturing number (stated on the nameplate of the unit).
▪ The installation date.
▪ The symptoms or malfunction, and details of the defect.
WARNING
▪ Do not modify, disassemble, remove, reinstall or repair
the unit yourself as incorrect dismantling or installation
may cause an electric shock or fire. Contact your
dealer.
About the refrigerant
▪ 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.
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R410A
Global warming potential (GWP) value: 2087.5
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO2-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
Recommended maintenance and
inspection
19.4.3
Recommended maintenance and
inspection cycles
Be aware that the mentioned maintenance and replacement cycles
do not relate to the warranty period of the components.
Component
Please contact your installer for more information.
WARNING
Electric motor
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.
PCB
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.
Inspection
cycle
Maintenance cycle
(replacements and/or
repairs)
1 year
20,000 hours
25,000 hours
Heat exchanger
5 years
Sensor (thermistor, etc.)
User interface and switches
5 years
25,000 hours
Drain pan
8 years
Expansion valve
20,000 hours
Solenoid valve
20,000 hours
The table assumes the following conditions of use:
▪ Normal use without frequent starting and stopping of the unit.
Depending on the model, we recommend not starting and
stopping the machine more than 6 times/hour.
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51
20 Troubleshooting
▪ Operation of the unit is assumed to be 10 hours/day and
2,500 hours/year.
NOTICE
▪ The table indicates main components. Refer to your
maintenance and inspection contract for more details.
▪ The table indicates recommended intervals of
maintenance cycles. However, in order to keep the unit
operational as long as possible, maintenance work may
be required sooner. Recommended intervals can be
used for appropriate maintenance design in terms of
budgeting
maintenance
and
inspection
fees.
Depending on the content of the maintenance and
inspection contract, inspection and maintenance cycles
may in reality be shorter than listed.
19.4.4
Shortened maintenance and replacement
cycles
Shortening of "maintenance cycle" and "replacement cycle" needs to
be considered in following situations:
The unit is used in locations where:
▪ Heat and humidity fluctuate out of the ordinary.
▪ Power fluctuation is high (voltage, frequency, wave distortion, etc.)
(the unit cannot be used if power fluctuation is outside the
allowable range).
▪ Bumps and vibrations are frequent.
▪ Dust, salt, harmful gas or oil mist such as sulphurous acid and
hydrogen sulfide may be present in the air.
WARNING
Stop operation and shut off the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electric shock or fire. Contact your dealer.
The system must be repaired by a qualified service person:
Malfunction
Turn off the main power
switch.
If water leaks from the unit.
Stop the operation.
The operation switch does not work
well.
Turn off the power.
If the user interface display indicates the Notify your installer and
unit number, the operation lamp flashes report the malfunction
and the malfunction code appears.
code.
If the system does not properly operate except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system according to the following
procedures.
Malfunction
▪ Check if no fuse has blown or breaker
has worked. Change the fuse or reset the
breaker if necessary.
Recommended replacement cycle of wear parts
Air filter
Inspection
cycle
Maintenance cycle
(replacements and/or
repairs)
1 year
5 years
High efficiency filter
1 year
Fuse
10 years
Crankcase heater
Pressure containing parts
8 years
In case of corrosion,
contact your local dealer.
NOTICE
▪ The table indicates main components. Refer to your
maintenance and inspection contract for more details.
▪ The table indicates recommended intervals of
replacement cycles. However, in order to keep the unit
operational as long as possible, maintenance work may
be required sooner. Recommended intervals can be
used for appropriate maintenance design in terms of
budgeting maintenance and inspection fees. Contact
your dealer for details.
INFORMATION
Damage due to taking apart or cleaning interiors of units by
anyone other than our authorised dealers may not be
included in the warranty.
20
Troubleshooting
Measure
If the system does not ▪ Check if there is no power failure. Wait
operate at all.
until power is restored. If power failure
occurs during operation, the system
automatically restarts immediately after
the power supply is recovered.
▪ The machine is started and stopped frequently or operation time is
long (sites with 24 hour air-conditioning).
Component
Measure
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates or the ON/OFF
switch does not properly work.
If the system goes into ▪ Check if air inlet or outlet of outdoor or
fan only operation, but
indoor unit is not blocked by obstacles.
as soon as it goes into
Remove any obstacle and make it wellheating or cooling
ventilated.
operation, the system
▪ Check if the user interface display shows
stops.
(time to clean the air filter). (Refer to
"19 Maintenance and service" on
page 50 and "Maintenance" in the indoor
unit manual.)
The system operates
but cooling or heating
is insufficient.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacle and make it wellventilated.
▪ Check if the air filter is not clogged (refer
to "Maintenance" in the indoor unit
manual).
▪ Check the temperature setting.
▪ Check the fan speed setting on your user
interface.
▪ Check for open doors or windows. Shut
doors and windows to prevent wind from
coming in.
▪ Check if there are too many occupants in
the room during cooling operation. Check
if the heat source of the room is
excessive.
▪ Check if direct sunlight enters the room.
Use curtains or blinds.
▪ Check if the air flow angle is proper.
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
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20 Troubleshooting
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
Main code
Contents
High pressure sensor malfunction (S1NPH)
Low pressure sensor malfunction (S1NPL)
INV PCB abnormal
20.1
Fin temperature abnormal
Error codes: Overview
Inverter PCB faulty
In case a malfunction code appears on the indoor unit user interface
display, contact your installer and inform the malfunction code, the
unit type, and serial number (you can find this information on the
nameplate of the unit).
Compressor over current detected
Compressor lock (startup)
Transmission outdoor unit - inverter: INV transmission
trouble
For your reference, a list with malfunction codes is provided. You
can, depending on the level of the malfunction code, reset the code
by pushing the ON/OFF button. If not, ask your installer for advice.
Main code
INV unbalanced power supply voltage
Fin thermistor malfunction
Capacity setting malfunction (outdoor)
Contents
External protection device was activated
Abnormal low pressure drop, faulty expansion valve
EEPROM failure (indoor)
Reversed power supply phase malfunction
Drain system malfunction (indoor)
INV voltage power shortage
Fan motor malfunction (indoor)
System test run not yet executed
Swing flap motor malfunction (indoor)
Faulty wiring indoor/outdoor
Expansion valve malfunction (indoor)
Abnormal user interface - indoor communication
Drain malfunction (indoor unit)
Faulty wiring to outdoor/outdoor
Filter dust chamber malfunction (indoor)
Abnormal main-sub user interface communication
Capacity setting malfunction (indoor)
System mismatch. Wrong type of indoor units
combined. Indoor unit malfunction.
Transmission malfunction between main PCB and sub
PCB (indoor)
Heat exchanger thermistor malfunction (indoor; liquid)
Connection malfunction over indoor units or type
mismatch
Heat exchanger thermistor malfunction (indoor; gas)
Centralised address duplication
Suction air thermistor malfunction (indoor)
Malfunction in communication centralised control
device - indoor unit
Discharge air thermistor malfunction (indoor)
Auto address malfunction (inconsistency)
Movement detector or floor temperature sensor
malfunction (indoor)
Auto address malfunction (inconsistency)
User interface thermistor malfunction (indoor)
PCB malfunction (outdoor)
20.2
Current leakage detector was activated (outdoor)
High pressure switch was activated
Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
Low pressure malfunction (outdoor)
Compressor lock detection (outdoor)
20.2.1
Fan motor malfunction (outdoor)
▪ The air conditioner does not start immediately after the ON/OFF
button on the user interface is pressed. If the operation lamp
lights, the system is in normal condition. To prevent overloading of
the compressor motor, the air conditioner starts 5 minutes after it
is turned ON again in case it was turned OFF just before. The
same starting delay occurs after the operation mode selector
button was used.
Electronic expansion valve malfunction (outdoor)
Discharge temperature malfunction (outdoor)
Abnormal suction temperature (outdoor)
Refrigerant overcharge detection
High pressure switch malfunction
Low pressure switch malfunction
Fan motor trouble (outdoor)
Ambient temperature sensor malfunction (outdoor)
Pressure sensor malfunction
Symptom: The system does not operate
▪ If "Under Centralized Control" is displayed on the user interface,
pressing the operation button causes the display to blink for a few
seconds. The blinking display indicates that the user interface
cannot be used.
Discharge temperature sensor malfunction (outdoor)
▪ The system does not start immediately after the power supply is
turned on. Wait one minute until the micro computer is prepared
for operation.
Heat exchanger gas temperature sensor malfunction
(outdoor)
20.2.2
Current sensor malfunction
Suction temperature sensor malfunction (outdoor)
De-icing temperature sensor malfunction (outdoor)
Liquid temperature sensor (after subcool HE)
malfunction (outdoor)
Liquid temperature sensor (coil) malfunction (outdoor)
Symptom: Fan operation is possible, but
cooling and heating do not work
Immediately after the power is turned on. The micro computer is
getting ready to operate and is performing a communication check
with all indoor units. Please wait 12 minutes maximally until this
process is finished.
Gas temperature sensor (after subcool HE)
malfunction (outdoor)
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
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53
21 Relocation
20.2.3
Symptom: The fan strength does not
correspond to the setting
The fan speed does not change even if the fan speed adjustment
button is pressed. During heating operation, when the room
temperature reaches the set temperature, the outdoor unit goes off
and the indoor unit changes to whisper fan speed. This is to prevent
cold air blowing directly on occupants of the room. The fan speed
will not change even when another indoor unit is in heating
operation, if the button is pressed.
20.2.4
Symptom: The fan direction does not
correspond to the setting
The fan direction does not correspond with the user interface
display. The fan direction does not swing. This is because the unit is
being controlled by the micro computer.
20.2.5
Symptom: White mist comes out of a unit
(Indoor unit)
▪ When humidity is high during cooling operation. If the interior of an
indoor unit is extremely contaminated, the temperature distribution
inside a room becomes uneven. It is necessary to clean the
interior of the indoor unit. Ask your dealer for details on cleaning
the unit. This operation requires a qualified service person.
▪ Immediately after the cooling operation stops and if the room
temperature and humidity are low. This is because warm
refrigerant gas flows back into the indoor unit and generates
steam.
20.2.6
Symptom: White mist comes out of a unit
(Indoor unit, outdoor unit)
20.2.9
Symptom: Noise of air conditioners
(Indoor unit, outdoor unit)
▪ A continuous low hissing sound is heard when the system is in
cooling or defrost operation. This is the sound of refrigerant gas
flowing through both indoor and outdoor units.
▪ A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation. This is the noise of
refrigerant caused by flow stop or flow change.
20.2.10 Symptom: Noise of air conditioners
(Outdoor unit)
When the tone of operating noise changes. This noise is caused by
the change of frequency.
20.2.11 Symptom: Dust comes out of the unit
When the unit is used for the first time in a long time. This is
because dust has gotten into the unit.
20.2.12 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emit it again.
20.2.13 Symptom: The outdoor unit fan does not
spin
During operation. The speed of the fan is controlled in order to
optimise product operation.
20.2.14 Symptom: The display shows "88"
When the system is changed over to heating operation after defrost
operation. Moisture generated by defrost becomes steam and is
exhausted.
This is the case immediately after the main power supply switch is
turned on and means that the user interface is in normal condition.
This continues for 1 minute.
20.2.7
20.2.15 Symptom: The compressor in the outdoor
unit does not stop after a short heating
operation
Symptom: The user interface display
reads "U4" or "U5" and stops, but then
restarts after a few minutes
This is because the user interface is intercepting noise from electric
appliances other than the air conditioner. The noise prevents
communication between the units, causing them to stop. Operation
automatically restarts when the noise ceases.
20.2.8
Symptom: Noise of air conditioners
(Indoor unit)
▪ A "zeen" sound is heard immediately after the power supply is
turned on. The electronic expansion valve inside an indoor unit
starts working and makes the noise. Its volume will reduce in
about one minute.
▪ A continuous low "shah" sound is heard when the system is in
cooling operation or at a stop. When the drain pump (optional
accessories) is in operation, this noise is heard.
▪ A "pishi-pishi" squeaking sound is heard when the system stops
after heating operation. Expansion and contraction of plastic parts
caused by temperature change make this noise.
▪ A low "sah", "choro-choro" sound is heard while the indoor unit is
stopped. When another indoor unit is in operation, this noise is
heard. In order to prevent oil and refrigerant from remaining in the
system, a small amount of refrigerant is kept flowing.
This is to prevent refrigerant from remaining in the compressor. The
unit will stop after 5 to 10 minutes.
20.2.16 Symptom: The inside of an outdoor unit is
warm even when the unit has stopped
This is because the crankcase heater is warming the compressor so
that the compressor can start smoothly.
20.2.17 Symptom: Hot air can be felt when the
indoor unit is stopped
Several different indoor units are being run on the same system.
When another unit is running, some refrigerant will still flow through
the unit.
21
Relocation
Contact your dealer for removing and reinstalling the total unit.
Moving units requires technical expertise.
22
Disposal
This unit uses hydrofluorocarbon. Contact your dealer when
discarding this unit.
Installer and user reference guide
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4P482257-1 – 2017.03
23 Glossary
Do not try to dismantle the system yourself: the dismantling of the
system, treatment of the refrigerant, of oil and of other parts must
comply with applicable legislation. Units must be treated at a
specialised treatment facility for reuse, recycling and recovery.
23
Glossary
Dealer
Sales distributor for the product.
Authorized installer
Technical skilled person who is qualified to install the
product.
User
Person who is owner of the product and/or operates the
product.
Applicable legislation
All international, European, national and local directives,
laws, regulations and/or codes that are relevant and
applicable for a certain product or domain.
Service company
Qualified company which can perform or coordinate the
required service to the product.
Installation manual
Instruction manual specified for a certain product or
application, explaining how to install, configure and maintain
it.
Operation manual
Instruction manual specified for a certain product or
application, explaining how to operate it.
Accessories
Labels, manuals, information sheets and equipment that are
delivered with the product and that need to be installed
according to the instructions in the accompanying
documentation.
Optional equipment
Equipment made or approved by Daikin that can be
combined with the product according to the instructions in
the accompanying documentation.
Field supply
Equipment not made by Daikin that can be combined with
the product according to the instructions in the
accompanying documentation.
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
Installer and user reference guide
55
4P482257-1 2017.03
Copyright 2017 Daikin