Installer and user
reference guide
VRV IV system air conditioner
REYQ8T7Y1B REYQ10T7Y1B REYQ12T7Y1B REYQ14T7Y1B REYQ16T7Y1B REYQ18T7Y1B REYQ20T7Y1B REMQ5T7Y1B
Installer and user reference guide
VRV IV system air conditioner
English
Table of Contents
6.4
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
5
5
6
6
6
6.5
7
7
6.6
6.7
For the installer
7
3 About the box
7
3.1
3.2
3.3
3.4
3.5
Overview: About the box ...........................................................
To unpack the outdoor unit........................................................
To remove the accessories from the outdoor unit .....................
Accessory pipes: Diameters......................................................
To remove the transportation stay.............................................
4 About the units and options
4.1
4.2
4.3
4.4
4.5
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
To select the piping size .............................................
5.3.3
To select refrigerant branch kits..................................
5.3.4
About the piping length ...............................................
5.3.5
Requirements in case of FXTQ indoor units ...............
5.3.6
Single outdoor units and standard multi-outdoor-unit
combinations >20 HP..................................................
5.3.7
Standard multi-outdoor-unit combinations ≤20 HP
and free multi-outdoor-unit combinations....................
5.3.8
Multiple outdoor units: Possible layouts......................
Preparing electrical wiring .........................................................
5.4.1
About electrical compliance ........................................
5.4.2
Safety device requirements ........................................
6 Installation
6.1
6.2
6.3
Overview: Installation ................................................................
Opening the units ......................................................................
6.2.1
To open the outdoor unit.............................................
6.2.2
To open the electrical component box of the outdoor
unit ..............................................................................
Mounting the outdoor unit..........................................................
6.3.1
To provide the installation structure ............................
Installer and user reference guide
2
8
Overview: About the units and options......................................
8
Identification label: Outdoor unit................................................
9
About the outdoor unit ...............................................................
9
System layout............................................................................
9
Combining units and options .....................................................
9
4.5.1
About combining units and options ............................. 9
4.5.2
Possible combinations of indoor units......................... 10
4.5.3
Possible combinations of outdoor units ...................... 10
4.5.4
Possible options for the outdoor unit........................... 10
5 Preparation
5.1
5.2
7
7
8
8
8
6.8
10
10
11
11
7 Configuration
7.1
7.2
12
12
13
13
13
15
15
16
7.3
17
18
19
20
20
21
21
21
22
22
22
22
22
Connecting the refrigerant piping ...............................................
6.4.1
Precautions when connecting refrigerant piping ..........
6.4.2
About connecting the refrigerant piping .......................
6.4.3
To route the refrigerant piping......................................
6.4.4
To connect the refrigerant piping to the outdoor unit ...
6.4.5
To connect the multi connection piping kit ...................
6.4.6
Multiple outdoor units: Knockout holes ........................
6.4.7
To connect the refrigerant branching kit ......................
6.4.8
To protect against contamination.................................
6.4.9
To braze the pipe end ..................................................
6.4.10 Using the stop valve and service port ..........................
6.4.11 To remove the pinched pipes.......................................
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
Precautions when charging refrigerant ........................
6.7.2
About charging refrigerant ...........................................
6.7.3
To determine the additional refrigerant amount ...........
6.7.4
To charge refrigerant: Flow chart.................................
6.7.5
To charge refrigerant ...................................................
6.7.6
Step 6a: To automatically charge refrigerant ...............
6.7.7
Step 6b: To manually charge refrigerant......................
6.7.8
Error codes when charging refrigerant.........................
6.7.9
Checks after charging refrigerant.................................
6.7.10 To fix the fluorinated greenhouse gases label .............
Connecting the electrical wiring..................................................
6.8.1
Precautions when connecting electrical wiring ............
6.8.2
Field wiring: Overview..................................................
6.8.3
About the electrical wiring ............................................
6.8.4
Guidelines when knocking out knockout holes ............
6.8.5
To route and fix the transmission wiring ......................
6.8.6
To connect the transmission wiring..............................
6.8.7
To finish the transmission wiring..................................
6.8.8
To route and fix the power supply................................
6.8.9
To connect the power supply .......................................
7.4
39
Overview: Configuration .............................................................
Making field settings...................................................................
7.2.1
About making field settings ..........................................
7.2.2
Field setting components .............................................
7.2.3
To access the 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: Monitoring settings.........................................
7.2.8
Mode 2: Field settings..................................................
7.2.9
To connect the PC configurator to the outdoor unit .....
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 ...................
Using the leak detection function ...............................................
7.4.1
About automatic leak detection....................................
7.4.2
To manually perform a leak detection..........................
8 Commissioning
8.1
8.2
8.3
8.4
8.5
8.6
8.7
23
23
23
23
23
24
24
24
24
25
25
26
26
26
27
27
27
28
28
28
28
29
29
30
32
33
34
35
35
35
35
35
36
36
37
37
37
38
38
38
39
39
39
39
39
40
40
40
41
42
45
45
45
45
46
47
47
47
47
48
Overview: Commissioning..........................................................
Precautions when commissioning ..............................................
Checklist before commissioning.................................................
About test run .............................................................................
To perform a test run..................................................................
Correcting after abnormal completion of the test run .................
Operating the unit.......................................................................
48
48
48
49
49
49
49
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
1 General safety precautions
9 Maintenance and service
9.1
9.2
9.3
Overview: Maintenance and service .........................................
Maintenance safety precautions................................................
9.2.1
To prevent electrical hazards......................................
About service mode operation...................................................
9.3.1
To use vacuum mode .................................................
9.3.2
To recover refrigerant .................................................
10 Troubleshooting
10.1
10.2
10.3
50
50
50
50
50
50
12 Technical data
55
Overview: Technical data ..........................................................
Dimensions: Outdoor unit..........................................................
Service space: Outdoor unit ......................................................
Components: Outdoor unit ........................................................
Components: Electrical component box....................................
Piping diagram: Outdoor unit.....................................................
Wiring diagram: Outdoor unit ....................................................
Technical specifications: Outdoor unit.......................................
Capacity table: Indoor unit.........................................................
55
55
56
57
59
60
63
71
73
For the user
74
13 About the system
74
13.1
19.1
19.2
50
54
Recommended maintenance and inspection cycles.... 79
Shortened maintenance and replacement cycles ........ 80
19 Troubleshooting
Overview: Troubleshooting........................................................ 50
Solving problems based on error codes.................................... 51
Error codes: Overview............................................................... 51
11 Disposal
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
18.4.3
18.4.4
50
System layout............................................................................ 74
80
Error codes: Overview................................................................
Symptoms that are NOT system malfunctions ...........................
19.2.1 Symptom: The system does not operate .....................
19.2.2 Symptom: Cool/Heat cannot be changed over ............
19.2.3 Symptom: Fan operation is possible, but cooling and
heating do not work......................................................
19.2.4 Symptom: The fan strength does not correspond to
the setting ....................................................................
19.2.5 Symptom: The fan direction does not correspond to
the setting ....................................................................
19.2.6 Symptom: White mist comes out of a unit (Indoor
unit) ..............................................................................
19.2.7 Symptom: White mist comes out of a unit (Indoor
unit, outdoor unit) .........................................................
19.2.8 Symptom: The user interface display reads "U4" or
"U5" and stops, but then restarts after a few minutes..
19.2.9 Symptom: Noise of air conditioners (Indoor unit).........
19.2.10 Symptom: Noise of air conditioners (Indoor unit,
outdoor unit).................................................................
19.2.11 Symptom: Noise of air conditioners (Outdoor unit) ......
19.2.12 Symptom: Dust comes out of the unit ..........................
19.2.13 Symptom: The units can give off odours......................
19.2.14 Symptom: The outdoor unit fan does not spin .............
19.2.15 Symptom: The display shows "88"...............................
19.2.16 Symptom: The compressor in the outdoor unit does
not stop after a short heating operation .......................
19.2.17 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped ..................................
19.2.18 Symptom: Hot air can be felt when the indoor unit is
stopped ........................................................................
81
82
82
82
82
82
82
82
82
82
82
82
82
82
82
82
83
83
83
14 User interface
74
15 Before operation
75
20 Relocation
83
16 Operation
75
21 Disposal
83
75
75
75
22 Glossary
83
75
75
1
General safety precautions
76
1.1
About the documentation
76
76
76
▪ The original documentation is written in English. All other
languages are translations.
16.1
16.2
16.3
16.4
16.5
16.6
Operation range ........................................................................
Operating the system ................................................................
16.2.1 About operating the system ........................................
16.2.2 About cooling, heating, fan only, and automatic
operation .....................................................................
16.2.3 About the heating operation........................................
16.2.4 To operate the system (WITHOUT cool/heat
changeover remote control switch) .............................
16.2.5 To operate the system (WITH cool/heat changeover
remote control switch).................................................
Using the dry program...............................................................
16.3.1 About the dry program ................................................
16.3.2 To use the dry program (WITHOUT cool/heat
changeover remote control switch) .............................
16.3.3 To use the dry program (WITH cool/heat changeover
remote control switch).................................................
Adjusting the air flow direction...................................................
16.4.1 About the air flow flap .................................................
Setting the master user interface ..............................................
16.5.1 About setting the master user interface ......................
16.5.2 To designate the master user interface (VRV DX and
Hydrobox) ...................................................................
About control systems ...............................................................
17 Energy saving and optimum operation
17.1
17.2
76
77
77
77
77
Maintenance after a long stop period ........................................
Maintenance before a long stop period .....................................
About the refrigerant..................................................................
After-sales service and warranty ...............................................
18.4.1 Warranty period ..........................................................
18.4.2 Recommended maintenance and inspection..............
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
▪ 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
77
77
78
Available main operation methods ............................................ 78
Available comfort settings ......................................................... 78
18 Maintenance and service
18.1
18.2
18.3
18.4
76
83
78
79
79
79
79
79
79
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING
Indicates a situation that could result in burning because of
extreme hot or cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
Installer and user reference guide
3
1 General safety precautions
▪ Batteries are marked with the following symbol:
WARNING
Indicates a situation that could result in death or serious
injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate
injury.
NOTICE
Indicates a situation that could result in equipment or
property damage.
INFORMATION
Indicates useful tips or additional information.
Symbol
Explanation
Before installation, read the installation and
operation manual, and the wiring instruction sheet.
Before performing maintenance and service tasks,
read the service manual.
For more information, see the installer and user
reference guide.
1.2
For the user
▪ If you are not sure how to operate the unit, contact your installer.
▪ This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in
a safe way and understand the hazards involved. Children shall
not play with the appliance. Cleaning and user maintenance shall
not be made by children without supervision.
WARNING
This means that the batteries may not be mixed with unsorted
household waste. If a chemical symbol is printed beneath the
symbol, this chemical symbol means that the battery contains a
heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries must be treated at a specialized treatment facility
for reuse. By ensuring waste batteries are disposed of correctly,
you will help to prevent potential negative consequences for the
environment and human health.
1.3
For the installer
1.3.1
General
If you are not sure how to install or operate the unit, contact your
dealer.
NOTICE
Improper installation or attachment of equipment or
accessories could result in electric shock, short-circuit,
leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or
approved by Daikin.
WARNING
Make sure installation, testing and applied materials
comply with applicable legislation (on top of the
instructions described in the Daikin documentation).
CAUTION
Wear adequate personal protective equipment (protective
gloves, safety glasses,…) when installing, maintaining or
servicing the system.
WARNING
▪ Do NOT rinse the unit.
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
▪ Do NOT operate the unit with wet hands.
DANGER: RISK OF BURNING
To prevent electric shocks or fire:
▪ Do NOT place any objects containing water on the unit.
▪ Do NOT place any objects or equipment on top of 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 sit, climb or stand on the unit.
▪ Do NOT touch any accidental leaking refrigerant.
NOTICE
▪ Units are marked with the following symbol:
This means that electrical and electronic products may not be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: the dismantling of the system, treatment of
the refrigerant, of oil and of other parts must be done by an
authorized installer and must comply with applicable legislation.
Units must be treated at a specialized treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health. For more information,
contact your installer or local authority.
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
CAUTION
Do NOT touch the air inlet or aluminum fins of the unit.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
NOTICE
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
Installer and user reference guide
4
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
1 General safety precautions
In accordance with the applicable legislation, it might be necessary
to provide a logbook with the product containing at least: information
on maintenance, repair work, results of tests, stand-by periods,…
Also, at least, following information must be provided at an
accessible place at the product:
▪ Instructions for shutting down the system in case of an emergency
▪ Name and address of fire department, police and hospital
▪ Name, address and day and night telephone numbers for
obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
1.3.2
Installation site
▪ Provide sufficient space around the unit for servicing and air
circulation.
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.
▪ Make sure the installation site withstands the unit's weight and
vibration.
NOTICE
▪ Make sure the area is well ventilated. Do NOT block any
ventilation openings.
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
▪ Make sure the unit is level.
Do NOT install the unit in the following places:
▪ In potentially explosive atmospheres.
▪ In places where there is machinery that emits electromagnetic
waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.
▪ In places where there is a risk of fire due to the leakage of
flammable gases (example: thinner or gasoline), carbon fibre,
ignitable dust.
NOTICE
▪ To avoid compressor breakdown, do NOT charge more
than the specified amount of refrigerant.
▪ When the refrigerant system is to be opened,
refrigerant must be treated according to the applicable
legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
▪ In case re-charge is required, refer to the nameplate of the unit. It
states the type of refrigerant and necessary amount.
1.3.3
▪ The unit is factory charged with refrigerant and depending on pipe
sizes and pipe lengths some systems require additional charging
of refrigerant.
Refrigerant
If applicable. See the installation manual or installer reference guide
of your application for more information.
NOTICE
Make sure refrigerant piping installation complies with
applicable legislation. In Europe, EN378 is the applicable
standard.
▪ Only use tools exclusively for the refrigerant type used in the
system, this to ensure pressure resistance and prevent foreign
materials from entering into the system.
▪ Charge the liquid refrigerant as follows:
If
A siphon tube is present
NOTICE
Make sure the field piping and connections are not
subjected to stress.
Then
Charge with the cylinder upright.
(i.e., the cylinder is marked with
"Liquid filling siphon attached")
WARNING
During tests, NEVER pressurize the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).
A siphon tube is NOT present
Charge with the cylinder upside
down.
WARNING
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ Open refrigerant cylinders slowly.
▪ Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
▪ Toxic gas may be produced if refrigerant gas comes
into contact with fire.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
5
1 General safety precautions
CAUTION
When the refrigerant charging procedure is done or when
pausing, close the valve of the refrigerant tank
immediately. If the valve is not closed immediately,
remaining pressure might charge additional refrigerant.
Possible consequence: Incorrect refrigerant amount.
1.3.4
Brine
If applicable. See the installation manual or installer reference guide
of your application for more information.
WARNING
The selection of the brine MUST be in accordance with the
applicable legislation.
WARNING
Take sufficient precautions in case of brine leakage. If
brine leaks, ventilate the area immediately and contact
your local dealer.
WARNING
The ambient temperature inside the unit can get much
higher than that of the room, e.g. 70°C. In case of a brine
leak, hot parts inside the unit can create a hazardous
situation.
WARNING
The use and installation of the application MUST comply
with the safety and environmental precautions specified in
the applicable legislation.
1.3.5
Water
If applicable. See the installation manual or installer reference guide
of your application for more information.
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do not come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
NOTICE
Precautions when laying power wiring:
▪ Do not connect wiring of different thicknesses to the
power terminal block (slack in the power wiring may
cause abnormal heat).
▪ When connecting wiring which is the same thickness,
do as shown in the figure below.
NOTICE
Make sure water quality complies with EU directive
98/83 EC.
1.3.6
Electrical
DANGER: RISK OF ELECTROCUTION
▪ Turn OFF all power supply before removing the
switch box cover, connecting electrical wiring or
touching electrical parts.
▪ Disconnect the power supply for more than 1 minute,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you
can touch electrical components. For the location of the
terminals, see the wiring diagram.
▪ Do NOT touch electrical components with wet hands.
▪ Do NOT leave the unit unattended when the service
cover is removed.
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, shall be installed in the fixed wiring.
▪ For wiring, use the designated power wire and connect
firmly, then secure to prevent outside pressure being
exerted on the terminal board.
▪ Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage the head and make proper tightening
impossible.
▪ Over-tightening the terminal screws may break them.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
NOTICE
Only applicable if the power supply is three‑phase, and the
compressor has an ON/OFF starting method.
If there exists the possibility of reversed phase after a
momentary black out and the power goes on and off while
the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed
phase can break the compressor and other parts.
Installer and user reference guide
6
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
2 About the documentation
2
About the documentation
2.1
About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set
consists of:
▪ General safety precautions:
▪ Safety instructions that you must read before installing
▪ Format: Paper (in the box of the outdoor unit)
▪ Outdoor unit installation and operation manual:
▪ Installation and operation instructions
▪ Format: Paper (in the box of the outdoor unit)
▪ Installer and user reference guide:
▪ Preparation of the installation, reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ Format: Digital files on http://www.daikineurope.com/supportand-manuals/product-information/
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.
The original documentation is written in English. All other languages
are translations.
Technical engineering data
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
extranet (authentication required).
For the installer
3
3.1
About the box
b
d
b
a
Overview: About the box
d
d
This chapter describes what you have to do after the box with the
outdoor unit is delivered on-site.
c
It contains information about:
▪ Unpacking and handling the outdoor unit
c
▪ Removing the accessories from the unit
▪ Removing the transportation stay
Keep the following in mind:
a
b
c
d
▪ At delivery, the unit must be checked for damage. Any damage
must be reported immediately to the carrier's claims agent.
Packaging material
Belt sling
Opening
Protector
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
NOTICE
▪ When handling the unit, take into account the following:
Use a belt sling of ≤20 mm wide that adequately bears the
weight of the unit.
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.
▪ Lift the unit preferably with a crane and 2 belts of at least 8 m long
as shown in the figure below. Always use protectors to prevent
belt damage and pay attention to the position of the unit's centre
of gravity.
▪ A forklift can only be used for transport as long as the unit remains
on its pallet as shown above.
3.2
To unpack the outdoor unit
Relief the unit from its packing material:
▪ Take care not to damage the unit when removing the shrink foil
with a cutter.
▪ Remove the 4 bolts fixing the unit to its pallet.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
7
4 About the units and options
14~20 HP
5~12 HP
Accessory pipes (mm)
HP
Øa
Øb
5
9.5
9.5
Liquid pipe
▪ Front connection
8
ID Øb
10
12
ID Øa
12.7
14
12.7
16
▪ Bottom connection
ID Øa
20
High pressure/low pressure
gas pipe
5
▪ Front connection
10
To remove the accessories from
the outdoor unit
5~12 HP
19.1
15.9
8
ID Øa
ID Øb
3.3
15.9
18
ID Øb
19.1
12
14
22.2
16
▪ Bottom connection
18
ID Øa
OD Øb
20
28.6
14~20 HP
(a)
3.5
Only in combination with the outdoor unit multi-connection
piping kit.
To remove the transportation stay
Only for REMQ5 (1×) + REYQ8 (1×) + REYQ14~20 (2×)
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
Make sure that all accessories are available in the unit.
b
a
1×
c
1×
1×
REQUEST FOR THE INDICATION OF INSTALLATION INFORMATION
No.
1
2
3
1×
4
5
6
7
8
9
10
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
No.
CALCULATE THE ADDITIONAL REFRIGERANT CHARGING AMOUNT BASED ON THE FORMULA BELOW BEFORE CHARGING.
WHEN RE-CHARGING TOTAL AMOUNT OF REFRIGERANT , CHARGE THE TOTAL OF THE AMOUNT CHARGED AT
SHIPMENT (INDICATED ON THE MACHINE NAMEPLATE) AND THE ADDITIONAL AMOUNT SHOWN AS FOLLOWS :
12
11
MODELNAME
No.
ADDITIONAL CHARGING
OUTDOOR AMOUNT
UNIT
kg
MODELNAME
No.
TOTAL LENGTH OF LIQUID
PIPE SIZE O22.2 x 0.37
(m) x 0.37
TOTAL LENGTH OF LIQUID
PIPE SIZE O12.7 x 0.12
(m) x 0.12
TOTAL LENGTH OF LIQUID
PIPE SIZE O19.1 x 0.26
(m) x 0.26
TOTAL LENGTH OF LIQUID
PIPE SIZE O9.5 x 0.059
(m) x 0.059
TOTAL LENGTH OF LIQUID
PIPE SIZE O15.9 x 0.18
(m) x 0.18
TOTAL LENGTH OF LIQUID
PIPE SIZE O6.4 x 0.022
(m) x 0.022
MODELNAME
INSTALLATION
SITE
No.
41
42
43
45
44
46
47
48
49
58
59
No.
No.
52
ONLY FOR RYYQ8~20 MODELS
RYYQ8~12 RYYQ14-16 RYYQ18-20
1.1
0.9
1.3
53
54
56
55
57
62
63
REMARK
SETTING
VALUE
REMARK
RESULT LEAK CHECK
DAY
MONTH
YEAR
4. MODEL NAME
3. FOR DETAILS CONCERNING PIPING SELECTION AND CALCULATION OR HOW TO OPERATE THE LEAK DETECTION FUNCTION, PLEASE REFER TO THE INSTALLATION MANUAL.
5. MANUFACTURING NUMBER
4. AFTER FILLING IN THIS TABLE, PLEASE PUT IT ON THE SWITCH BOX COVER.
6. AFTER EQUIPPING, PLEASE PUT IT ON THE BACK SIDE OF THE FRONT PLATE.
3P328191-1
3P328192-1
g
1×
3.4
Remove the transportation stay (b) as shown in the figure
below.
3
Tighten the fixing nut (a) again.
RESULT LEAK CHECK
DATE
AMOUNT
a
b
c
d
e
f
g
2
RESULT LEAK CHECK
AMOUNT
DATE
DATE
1×
Slightly loosen the fixing nut (a).
AMOUNT
64
DATE
VALUE
3. RECORD OF INSTALLATION DATE
f
1
DATE
RESULT LEAK CHECK
60
DATE
61
MODELNAME
INSTALLATION
SITE
2. RECORD FOR SETTINGS (CONTENTS SEE INSTALLATION MANUAL)
SETTING
kg
AMOUNT
51
MODELNAME
INSTALLATION
SITE
Total indoor unit
capacity connection
kg ratio (CR)
8HP 10-12HP 14-16HP 18-20HP
0.5
0
0
Total indoor unit capacity 50%< CR < 105% 0
1.0
0.5
when piping length <30m105%< CR < 130% 0.5
0.5
0.5
0
0
50%< CR < 70% 0
1.0
0.5
0.5
Total indoor unit capacity 70%< CR < 85% 0.3
1.5
1
1
when piping length >30m 85%< CR < 105% 0.7
2.0
1.5
1.5
105%< CR < 130% 1.2
2. RECORD OF ADDITIONAL REFRIGERANT CHARGE AMOUNT AND RESULT OF LEAK CHECK OPERATION
50
MODELNAME
INSTALLATION
SITE
1×
BE SURE TO FILL OUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.
1. CALCULATION OF ADDITIONAL REFRIGERANT CHARGING AMOUNT
MODELNAME
INSTALLATION
SITE
INSTALLATION
SITE
INSTALLATION
SITE
The transportation stay installed over the compressor leg for
protecting the unit during transport must be removed. Proceed as
shown in the figure and procedure below.
REQUEST FOR THE INDICATION OF ADDITIONAL REFRIGERANT CHARGING AND LEAK DETECTION OPERATION RESULT
BE SURE TO FILL OUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.
1. RECORD OF INDOOR UNIT MODEL AND INSTALLATION SITE
e
d
General safety precautions
Installation manual and operation manual
Additional refrigerant charge label
Installation information sticker
Fluorinated greenhouse gases label
Multilingual fluorinated greenhouse gases label
Piping accessory bag
2
3 (12.3 N·m)
1
a
b
Accessory pipes: Diameters
HP
Øa
Øb
Gas pipe
Accessory pipes (mm)
5
25.4
19.1
4
About the units and options
▪ Front connection
8
10
22.2
12
28.6
4.1
Overview: About the units and
options
ID Øa
ID Øb
▪ Bottom connection
ID Øa
OD Øb
14
16
This chapter contains information about:
18
▪ Identification of the outdoor unit.
20
18+20(a)
Installer and user reference guide
8
▪ Where the outdoor unit fits in the system layout.
31.8
41.4
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
4 About the units and options
▪ With which indoor units and options you can combine the outdoor
units.
4.4
INFORMATION
▪ Which outdoor units have to be used as standalone units, and
which outdoor units can be combined.
4.2
System layout
When using FXTQ indoor units, different requirements
apply. See "5.3.5 Requirements in case of FXTQ indoor
units" on page 16.
Identification label: Outdoor unit
NOTICE
Location
5~12 HP
14~20 HP
Design of the system must not be done at temperatures
below –15°C.
INFORMATION
Not all combinations of indoor units are allowed, for
guidance, see "4.5.2 Possible combinations of indoor
units" on page 10.
1
a
c
b
c
e
Model identification
2
c
f
e
h
Example: R E Y Q 18 T7 Y1 B [*]
Code
Explanation
R
Outdoor air cooled
E
Heat recovery
Y
Y=Single or multi module
k
18
Capacity class
T7
Model series
Y1
Power supply
B
European market
[*]
Minor model change indication
c
c
i
e
e
k
j
k
5
About the outdoor unit
e
k
k
c
This installation manual concerns the VRV IV, full inverter driven,
heat recovery system.
e
Model line up:
Model
4
d
Refrigerant R410A
k
l
3
M=Multi module only
Q
4.3
k
g
Description
REYQ8~20
Heat recovery model for single or multi-use
REMQ5
Heat recovery model for multi-use only
Depending on the type of outdoor unit which is chosen, some
functionality will or will not exist. It will be indicated throughout this
installation manual and brought to your attention. Certain features
have exclusive model rights.
These units are intended for outdoor installation and aimed for heat
pump applications including air to air and air to water applications.
These units have (in single use) heating capacities ranging from 25
to 63 kW and cooling capacities rating from 22.4 to 56 kW. In multi
combination the heating capacity can go up till 168 kW and in
cooling till 150 kW.
The outdoor unit is designed to work in heating mode at ambient
temperatures from –20°C WB to 15.5°C WB and in cooling mode at
ambient temperatures from –5°C DB to 43°C DB.
k
l
a
b
c
d
e
f
g
h
i
j
k
l
Outdoor unit
Refrigerant piping
BS unit
Multi BS unit
VRV DX indoor unit
LT Hydrobox unit
Cooling-only VRV indoor unit
HT Hydrobox unit
EKEXV kit
AHU
User interface
Wireless user interface
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 heat recovery.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
9
5 Preparation
The VRV IV heat recovery system can be combined with several
types of indoor units and is intended for R410A use only.
Continuous heating
For an overview which units are available you can consult the
product catalogue for VRV IV.
REYQ44 = REYQ12 + 16 + 16
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, single outdoor
unit use, multiple outdoor unit use, combinations between indoor
units, etc.) mentioned in the technical engineering data.
4.5.2
Possible combinations of indoor units
REYQ42 = REYQ10 + 16 + 16
REYQ46 = REYQ14 + 16 + 16
REYQ48 = REYQ16 + 16 + 16
REYQ50 = REYQ16 + 16 + 18
REYQ52 = REYQ16 + 18 + 18
REYQ54 = REYQ18 + 18 + 18
4.5.4
INFORMATION
Possible options for the outdoor unit
INFORMATION
When using FXTQ indoor units, different requirements
apply. See "5.3.5 Requirements in case of FXTQ indoor
units" on page 16.
In general following type of indoor units can be connected to a VRV
IV heat recovery system. The list is non-exhaustive and is depending
on both outdoor unit model and indoor unit model combinations.
▪ VRV direct expansion (DX) indoor units (air-to-air applications).
Refer to the technical engineering data for the latest option
names.
Refrigerant branching kit
Description
Refnet header
KHRQ23M64H
▪ HT (high temperature) Hydrobox (air-to-water applications): HXHD
series (heating only).
▪ LT (low temperature)
HXY080/125 series.
Hydrobox
(air-to-water
applications):
KHRQ23M75H
Refnet joint
4.5.3
Possible combinations of outdoor units
KHRQ23M20T
KHRQ23M29T9
KHRQ23M64T
▪ AHU (air-to-air applications): EKEXV-kit+EKEQM-box required,
depending on the application.
▪ Comfort air curtain (air-to-air applications): CYVS (Biddle) series.
Model name
KHRQ23M29H
KHRQ23M75T
For the selection of the optimal branching kit, please refer to
"5.3.3 To select refrigerant branch kits" on page 15.
Outdoor multi connection piping kit
Possible standalone outdoor units
Number of outdoor units
Model name
Non-continuous heating
2
BHFQ23P907
REYQ8
3
BHFQ23P1357
REYQ10
PC configurator cable (EKPCCAB)
REYQ12
REYQ20
For VRV IV heat recovery system it is also possible to make several
commissioning field settings through a personal computer interface.
For this option EKPCCAB is required which is a dedicated cable to
communicate with the outdoor unit. The user interface software is
available on http://www.daikineurope.com/support-and-manuals/
software-downloads/.
Possible standard combinations of outdoor units
Heater tape kit
▪ REYQ10~54 consist of 2 or 3 REYQ8~20 or REMQ5 units.
To keep the drain holes free in cold climates with high humidity, you
can install a heater tape kit.
REYQ14
REYQ16
REYQ18
▪ REMQ5 units cannot be used as standalone outdoor units.
Description
Continuous heating
Model name
REYQ10 = REMQ5 + 5
Heater tape kit for 5~12 HP
EKBPH012T
REYQ13 = REYQ8 + REMQ5
Heater tape kit for 14~20 HP
EKBPH020T
REYQ16 = REYQ8 + 8
See also: "5.2.2 Additional installation site requirements of the
outdoor unit in cold climates" on page 12.
REYQ18 = REYQ8 + 10
REYQ20 = REYQ8 + 12
REYQ22 = REYQ10 + 12
5
Preparation
REYQ28 = REYQ12 + 16
5.1
Overview: Preparation
REYQ30 = REYQ12 + 18
REYQ32 = REYQ16 + 16
This chapter describes what you have to do and know before going
on-site.
REYQ34 = REYQ16 + 18
It contains information about:
REYQ36 = REYQ16 + 20
▪ Preparing the installation site
REYQ38 = REYQ8 + 12 + 18
▪ Preparing the refrigerant piping
REYQ24 = REYQ8 + 16
REYQ26 = REYQ12 + 14
REYQ40 = REYQ10 + 12 + 18
Installer and user reference guide
10
▪ Preparing the electrical wiring
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
5 Preparation
5.2
Preparing installation site
Installation site requirements of the
outdoor unit
5.2.1
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the unit's weight and
vibration.
▪ Make sure the area is well ventilated. Do NOT block any
ventilation openings.
▪ Make sure the unit is level.
▪ Select a place where rain can be avoided as much as possible.
▪ Select the location of the unit in such a way that the sound
generated by the unit does not disturb anyone, and the location is
selected according the applicable legislation.
Do NOT install the unit in the following places:
▪ In potentially explosive atmospheres.
▪ In places where there is machinery that emits electromagnetic
waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.
▪ In places where there is a risk of fire due to the leakage of
flammable gases (example: thinner or gasoline), carbon fibre,
ignitable dust.
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
▪ 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.
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
▪ When installing, take strong winds, typhoons or earthquakes into
account, improper installation may result in the unit turning over.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ When installing the unit in a small room, take measures in order to
keep the refrigerant concentration from exceeding allowable
safety limits in the event of a refrigerant leak, refer to "About
safety against refrigerant leaks" on page 12.
CAUTION
Excessive refrigerant concentrations in a closed room can
lead to oxygen deficiency.
▪ Be sure that the air inlet of the unit is not positioned towards the
main wind direction. Frontal wind will disturb the operation of the
unit. If necessary, use a screen to block the wind.
▪ Ensure that water cannot cause any damage to the location by
adding water drains to the foundation and prevent water traps in
the construction.
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.
Install the outdoor unit away from direct sea winds.
Example: Behind the building.
b
a
NOTICE
c
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.
NOTICE
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.
If the outdoor unit is exposed to direct sea winds, install a
windbreaker.
▪ Height of windbreaker≥1.5×height of outdoor unit
▪ Mind the service space requirements when installing the
windbreaker.
d
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
c
b
e
c
b
(mm)
a
b
d
c
d
c
d
f
a
a
b
c
d
e
f
Personal computer or radio
Fuse
Earth leakage protector
User interface
Indoor unit
Outdoor unit
a
b
c
d
Sea wind
Building
Outdoor unit
Windbreaker
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.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
11
5 Preparation
5.2.2
Additional installation site requirements
of the outdoor unit in cold climates
NOTICE
When operating the unit 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.
NOTICE
When operating the unit in a low outdoor ambient
temperature, be sure to follow the instructions described
below.
In heating:
20
In heavy snowfall areas it is very important to select an installation
site where the snow will NOT affect the unit. If lateral snowfall is
possible, make sure that the heat exchanger coil is NOT affected by
the snow. If necessary, install a snow cover or shed and a pedestal.
15.5
15
10
TAO (°C WB)
5
a
b
0
–5
–10
–15
–20
10
15
20
25 27 30
TAI (°C DB)
a Warming up operation range
b Operation range
TAI Ambient indoor temperature
TAO Ambient outdoor temperature
If the unit has to operate for 5 days in this area with
high humidity (>90%), Daikin recommends to install the
optional heater tape kit (EKBPH012T or EKBPH020T) to
keep the drain holes free.
INFORMATION
For instructions on how to install the snow cover, contact
your dealer.
Securing safety against refrigerant leaks
NOTICE
5.2.3
When installing the snow cover, do NOT obstruct the air
flow of the unit.
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.
Installer and user reference guide
12
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
5 Preparation
3
a
b
a
b
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.
4
To check the maximum concentration level
Check the maximum concentration level in accordance with steps 1
to 4 below and take whatever action is necessary to comply.
1
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.
Formula
F/G≤H
F
Total volume of refrigerant in the refrigerant
system
G
Size (m3) of smallest room in which there is
an indoor unit installed
H
Maximum concentration level (kg/m3)
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.
Calculate the amount of refrigerant (kg) charged to each system
separately.
5.3
Preparing refrigerant piping
Formula
A+B=C
5.3.1
Refrigerant piping requirements
A
Amount of refrigerant in a single unit system
(amount of refrigerant with which the system
is charged before leaving the factory)
B
NOTICE
The refrigerant R410A requires strict cautions for keeping
the system clean, dry and tight.
Additional charging amount (amount of
refrigerant added locally)
▪ Clean and dry: foreign materials (including mineral oils
or moisture) should be prevented from getting mixed
into the system.
Total amount of refrigerant (kg) in the
system
C
▪ 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
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.
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
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
Where there are no smaller room divisions:
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
▪ Temper grade: use piping with temper grade in function of the
pipe diameter as listed in table below.
Pipe Ø (mm)
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.
Temper grade of piping material
≤15.9
O (annealed)
≥19.1
1/2H (half hard)
▪ All piping lengths and distances have been taken into
consideration (see "5.3.4 About the piping length" on page 15).
5.3.2
To select the piping size
INFORMATION
a
When using FXTQ indoor units, different requirements
apply. See "5.3.5 Requirements in case of FXTQ indoor
units" on page 16.
b
Determine the proper size referring to following tables and reference
figure (only for indication).
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.)
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
13
5 Preparation
▪ Downstream capacity for D=capacity index of unit 1+capacity
index of unit 2
E: Piping between refrigerant branch kit or BS unit
and indoor unit
a
D
3
1
b
E
x
A
E
C
y
C
Pipe size for direct connection to indoor unit must be the same as
the connection size of the indoor unit (in case indoor unit is VRV DX
indoor or Hydrobox).
C
B
Indoor unit capacity
index
4
2
1,2
3
4
A~E
a,b
x,y
VRV DX indoor unit
BS unit
Cooling-only VRV indoor unit
Piping
Indoor branch kit
Outdoor multi connection kit
Gas pipe
Liquid pipe
15~50
12.7
6.4
63~140
15.9
9.5
200
19.1
250
22.2
▪ If a size-up of the piping is required, refer to the table below.
a
b
A, B, C: Piping between outdoor unit and (first)
refrigerant branch kit
a
b
c
d
e
Piping outer diameter size (mm)
Liquid pipe
Suction gas
High
pipe
pressure/low
pressure gas
pipe
Size up
5~8
9.5 → 12.7
9.5
19.1
15.9
9.5
22.2
19.1
10
12
12.7
28.6
19.1
12+14
14~16
12.7
28.6
22.2
16
18~22
18
15.9
28.6
22.2
20~22
15.9
28.6
28.6
24
24
15.9
34.9
28.6
26~34
26~34
19.1
34.9
28.6
36~54
36
19.1
41.3
28.6
38~54
19.1
41.3
34.9
Indoor unit capacity
index
<150
Piping outer diameter size (mm)
Liquid pipe
9.5
Suction gas
High
pipe
pressure/low
pressure gas
pipe
Outdoor unit
Main pipes
Increase
First refrigerant branch kit
Indoor unit
Liquid piping outer diameter size (mm)
10
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.
e
HP class
5~8
D: Piping between refrigerant branch kits or
refrigerant branch kit and BS unit
c
d
Choose from the following table in accordance with the outdoor unit
total capacity type, connected downstream.
Outdoor unit
capacity type (HP)
Piping outer diameter size (mm)
12.7 → 15.9
15.9 → 19.1
19.1 → 22.2
▪ The pipe thickness of the refrigerant piping shall comply with the
applicable legislation. The minimal pipe thickness for R410A
piping must be in accordance with the table below.
Pipe Ø (mm)
Minimal thickness t (mm)
6.4/9.5/12.7
0.80
15.9
0.99
19.1/22.2
0.80
28.6
0.99
34.9
1.21
41.3
1.43
▪ 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:
15.9
12.7
150≤x<200
19.1
15.9
200≤x<290
22.2
19.1
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
28.6
▪ The additional refrigerant calculation has to be adjusted as
mentioned in "6.7.3 To determine the additional refrigerant
amount" on page 29.
290≤x<420
12.7
420≤x<640
15.9
640≤x<920
19.1
≥920
28.6
34.9
▪ Select the pipe size nearest to the required size.
41.3
Example:
▪ Downstream capacity for E=capacity index of unit 1
Installer and user reference guide
14
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
5 Preparation
5.3.3
To select refrigerant branch kits
INFORMATION
When using FXTQ indoor units, different requirements
apply. See "5.3.5 Requirements in case of FXTQ indoor
units" on page 16.
Refrigerant refnets
Make sure the piping installation does not exceed the maximum
allowable pipe length, the allowable level difference, and the
allowable length after branching. To illustrate the piping length
requirements, six cases are discussed in the chapters below. They
describe both standard and non-standard outdoor unit combinations
with VRV DX indoor units, Hydrobox units and/or air handling units
(AHU).
Definitions
For piping example, refer to "5.3.2 To select the piping size" on
page 13.
▪ 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).
Outdoor unit capacity type
(HP)
3 pipes
8~10
KHRQ23M29T9
12~22
KHRQ23M64T
24~54
KHRQ23M75T
▪ For refnet joints other than the first branch (example refnet joint b),
select the proper branch kit model based on the total capacity
index of all indoor units connected after the refrigerant branch.
Term
Actual piping length
Pipe length between outdoor and
indoor units
Equivalent piping length
Pipe length between outdoor and
indoor units, including the
equivalent length of the piping
accessories
Total piping length
Total piping length, from the
outdoor to all indoor units
Equivalent length of the piping accessories
Accessory
Equivalent length (m)
Refnet joint
0.5
Refnet header
1
Single BS1Q100~160
4
KHRQ23M20T
Single BS1Q25
6
200≤x<290
KHRQ23M29T9
Multi BS4~16Q14
4
290≤x<640
KHRQ23M64T
≥640
KHRQ23M75T
Indoor unit capacity index
3 pipes
<200
▪ 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
3 pipes
<200
KHRQ23M29H
Allowable height difference
Term
Definition
Height difference
(m)
H1
Height difference
between outdoor and
indoor units
50/40(b)
H2
Height difference
between indoor units
200≤x<290
290≤x<640
KHRQ23M64H(a)
≥640
KHRQ23M75H
(a)
If the pipe size above the refnet header is Ø34.9 or more,
KHRQ23M75H is required.
Maximum 8 branches can be connected to a header.
Height difference
between outdoor
units
5
H4
Height difference
between EKEXV‑kits
and AHU units.
5
(a)
▪ How to choose an outdoor multi connection piping kit. Choose
from the following table in accordance with the number of outdoor
units.
Number of outdoor units
Branch kit name
2
BHFQ23P907
3
BHFQ23P1357
INFORMATION
Reducers or T-joints are field supplied.
NOTICE
Refrigerant branch kits can only be used with R410A.
About the piping length
INFORMATION
When using FXTQ indoor units, different requirements
apply. See "5.3.5 Requirements in case of FXTQ indoor
units" on page 16.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
15
30(a)
H3
INFORMATION
5.3.4
Definition
(b)
If single outdoor units or standard multi-outdoor
combinations >20 HP are connected to only VRV DX
indoor units, then the height difference between indoor
units (= H2) can be increased from 15 to 30 m. However,
this limits the allowable maximum length of the longest pipe
(see "Connection with only VRV DX indoor units" on
page 17).
The allowable height difference is 50 m in case the outdoor
unit is positioned higher than the indoor unit, and 40 m in
case the outdoor unit is positioned lower than the indoor
unit. If only VRV DX indoor units are used, the allowable
height difference between outdoor and indoor units may be
extended to 90 m, without the need of an additional option
kit. In this case, make sure all conditions below are met:
If
The outdoor unit is positioned
higher than the indoor units
Then
▪ Minimum
80%
connection
ratio:
▪ Size up the liquid piping (refer
to "5.3.2 To select the piping
size" on page 13 for more
information)
▪ Activate the outdoor unit
setting. Refer to the service
manual for more information.
Installer and user reference guide
15
5 Preparation
If
3 Total piping length
Then
The outdoor unit is positioned
lower than the indoor units
▪ Minimum connection ratio
varies according to the height
difference between outdoor
and indoor units:
▪ 40~60 m: 80%
Possible combinations
FXTQ indoor units cannot be combined with any other indoor type
compatible with the outdoor unit. Only the following outdoor-indoor
unit combinations are allowed:
FXTQ50
FXTQ63
FXTQ80
FXTQ100
REYQ8
4× O
—
—
—
REYQ10
—
4× O
—
—
REYQ12
—
—
4× O
—
REYQ14
—
—
2× O
2× O
REYQ16
—
—
—
4× O
A
B
a2
2
c
c
a1
a2
c
3
C
4
c
1
c
c
2
c
2
4
3
FXTQ50
FXTQ63
FXTQ80
FXTQ100
FXTQ100
A
B
C
a1, a2
b
c
Piping between outdoor unit and first refrigerant branch kit
Piping between refrigerant branch kits
Piping between refrigerant branch kit and indoor units
Refnet joints
Refnet header
BS unit
FXTQ50
FXTQ63
FXTQ80
FXTQ100
FXTQ100
19.1
9.5
15.9
22.2
9.5
19.1
12
28.6
12.7
19.1
14+16
28.6
12.7
22.2
Outdoor unit
capacity type
(HP)
Suction gas
pipe
8+10
12
14+16
Piping outer diameter size (mm)
Liquid pipe
High pressure/
low pressure
gas pipe
22.2
9.5
19.1
28.6
12.7
19.1
28.6
15.9
28.6
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
FXTQ50
15.9
9.5
FXTQ63
15.9
9.5
FXTQ80
19.1
9.5
FXTQ100
22.2
9.5
Outdoor unit capacity type
(HP)
Refnet joint
8+10
KHRQ23M29T9
12~16
KHRQ23M64T
4
8 HP
10 HP
12 HP
14 HP
16 HP
FXTQ50
FXTQ63
FXTQ80
FXTQ80
FXTQ100
8
10
a1, a2: Refnet joints
3
1
High pressure/
low pressure
gas pipe
Indoor unit
b
B
Liquid pipe
Use the same diameters as the connections (liquid, gas) on the
indoor units. The diameters of the indoor units are as follows:
2.
A
Suction gas
pipe
C: Piping between BS unit and indoor unit
System layout (2 possibilities)
1
Piping outer diameter size (mm)
Outdoor unit
capacity type
(HP)
Use the following diameters:
When using FXTQ indoor units, the following requirements apply.
C
≤15 m
B: Piping between refrigerant branch kits or between refrigerant
branch kit and BS unit
Requirements in case of FXTQ indoor
units
c
3 Indoor-Indoor
Use the following diameters:
▪ No technical cooling
B
≤50 m
▪ 65~80 m: 100%
▪ Activate the outdoor unit
setting. Refer to the service
manual for more information.
1.
≤40 m
2 Outdoor-Indoor (outdoor highest)
A: Piping between outdoor unit and first refrigerant branch kit
▪ 80~90 m: 110%
Outdoor unit
1 Indoor-Outdoor (outdoor lowest)
▪ 60~65 m: 90%
▪ Size up the liquid piping (refer
to "5.3.2 To select the piping
size" on page 13 for more
information)
5.3.5
≤300 m
Maximum height differences
FXTQ50
FXTQ63
FXTQ80
FXTQ80
FXTQ100
Refrigerant piping length and height difference
b: Refnet header
Outdoor unit capacity type
(HP)
Refnet header
8+10
KHRQ23M64H
12~16
KHRQ23M75H
c: BS unit
Indoor unit
BS unit
FXTQ50/FXTQ63
BS1Q16
FXTQ80/FXTQ100
BS1Q25
The piping lengths and height differences must comply with the
following requirements.
Additional refrigerant charge
Maximum piping lengths
When using FXTQ indoor units, additional refrigerant needs to be
charged to the system.
1 Longest pipe (actual)
≤120 m
2 After first branch
≤40 m
Installer and user reference guide
16
Total system refrigerant charge = Z = O+R+P
O
Standard factory charge of outdoor unit
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
5 Preparation
Additional refrigerant charge according to liquid piping
diameter/length and outdoor unit specific amount. See
"6.7.3 To determine the additional refrigerant amount" on
page 29.
Additional refrigerant charge due to use of FXTQ indoor
units. P=ΣT1..4
Additional charge for each indoor unit used (depending on
type)
R
P
T
5.3.6
Indoor unit
T (kg)
FXTQ50
0.6
FXTQ63
0.5
FXTQ80
0.9
FXTQ100
1.1
1
In case of BS1Q units, the piping length between all indoor
units and the nearest branch kit is ≤40 m.
2
In case of multi BS units, the piping length between all indoor
units and the multi BS unit is ≤40 m.
3
It is required to size up the liquid piping between the first branch
kit and the last. Beware that in contrast to multi BS units, BS1Q
units are NOT considered branch kits. If the increased pipe size
is larger than the pipe size of the main pipe, also increase the
size of the main pipe.
After sizing up the liquid piping (previous condition), double its
length in the calculation of the total piping length. Make sure the
total piping length is within limitations.
4
Single outdoor units and standard multioutdoor-unit combinations >20 HP
Connection with only VRV DX indoor units
An extension up to 90 m is possible if all of the following
conditions are met:
(c)
5
The piping length difference between the nearest indoor unit to
the outdoor unit and the farthest indoor unit to the outdoor unit
is ≤40 m.
Connection with VRV DX indoor units and
Hydrobox units
a
H3
H3
a
4
1
5
4
1
2
c
c
2
d
b
3
5
H1
H1
3
b
b
e
b
e
d
H2
H2
e
a
b
c
d
e
Outdoor unit
VRV DX indoor unit
Multi BS unit
BS unit
VRV DX indoor unit
Pipe
Longest pipe from the outdoor
unit or the last multi-outdoor
piping branch (1+2, 1+3, 1+5)
Maximum length (actual/
equivalent)
165 m/190 m(a)
40 m/—(c)
In case of a multi-outdoor setup:
longest pipe from the outdoor
unit to the last multi-outdoor
piping branch (4)
10 m/13 m
Total pipe length
1000 m/—
(b)
If the equivalent piping length is more than 90 m, size up
the main liquid piping according to "5.3.2 To select the
piping size" on page 13.
If the height difference between indoor units (= H2) is
between 15 and 30 m, then the allowable maximum length
of the longest pipe is limited to 120/165 m (actual/
equivalent).
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Outdoor unit
VRV DX indoor unit
Multi BS unit
LT Hydrobox unit
HT Hydrobox unit
Pipe
120 m/165 m(b)
Longest pipe after the first
branch (2, 3, 5)
(a)
a
b
c
d
e
Longest pipe from the outdoor
unit or the last multi-outdoor
piping branch (1+2, 1+3, 1+5)
Longest pipe after the first
branch (2, 3, 5)
In case of a multi-outdoor setup:
longest pipe from the outdoor
unit to the last multi-outdoor
piping branch (4)
Total pipe length
(a)
(b)
Maximum length (actual/
equivalent)
135 m/160 m(a)
40 m
10 m/13 m
300 m/600 m(b)
If the equivalent piping length is more than 90 m, size up
the main liquid piping according to "5.3.2 To select the
piping size" on page 13.
In this case, both are actual piping lengths: outdoor units
≤20 HP / outdoor units >20 HP.
Installer and user reference guide
17
5 Preparation
5.3.7
Connection with VRV DX indoor units and air
handling units
Standard multi-outdoor-unit combinations
≤20 HP and free multi-outdoor-unit
combinations
a
Connection with only VRV DX indoor units
H3
H3
a
5
4
1
2
d
4
1
e
c
c
d
e
b
3
2
f
b
b
e
f
e
H2
H4
H2
b
d
H1
H1
3
5
b
a
b
c
d
e
f
a
b
c
d
e
Outdoor unit
VRV DX indoor unit
Multi BS unit
BS unit
EKEXV kit
AHU
Pipe
Longest pipe from the outdoor
unit or the last multi-outdoor
piping branch (1+2, 1+3, 1+5)
Longest pipe after the first
branch (2, 3, 5)
Pipe
Maximum length (actual/
equivalent)
165 m/190 m(a)
40 m/—
In case of a multi-outdoor setup:
longest pipe from the outdoor
unit to the last multi-outdoor
piping branch (4)
10 m/13 m
Total pipe length
1000 m/—
(a)
18
Longest pipe from the outdoor
unit or the last multi-outdoor
piping branch (1+2, 1+3, 1+5)
Maximum length (actual/
equivalent)
135 m/160 m(a)
Longest pipe after the first
branch (2, 3, 5)
40 m/—(b)
In case of a multi-outdoor setup:
longest pipe from the outdoor
unit to the last multi-outdoor
piping branch (4)
10 m/13 m
Total pipe length
(a)
If the equivalent piping length is more than 90 m, size up
the main liquid piping according to "5.3.2 To select the
piping size" on page 13.
Installer and user reference guide
Outdoor unit
VRV DX indoor unit
Multi BS unit
BS unit
VRV DX indoor unit
(b)
500 m/—
If the equivalent piping length is more than 90 m, size up
the main liquid piping according to "5.3.2 To select the
piping size" on page 13.
An extension up to 90 m is possible if all of the following
conditions are met:
1
In case of BS1Q units, the piping length between all indoor
units and the nearest branch kit is ≤40 m.
2
In case of multi BS units, the piping length between all indoor
units and the multi BS unit is ≤40 m.
3
It is required to size up the liquid piping between the first branch
kit and the last. Beware that in contrast to multi BS units, BS1Q
units are NOT considered branch kits. If the increased pipe size
is larger than the pipe size of the main pipe, also increase the
size of the main pipe.
4
After sizing up the liquid piping (previous condition), double its
length in the calculation of the total piping length. Make sure the
total piping length is within limitations.
5
The piping length difference between the nearest indoor unit to
the outdoor unit and the farthest indoor unit to the outdoor unit
is ≤40 m.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
5 Preparation
Connection with VRV DX indoor units and
Hydrobox units
Connection with VRV DX indoor units and air
handling units
a
H3
H3
a
4
1
4
2
5
2
1
d
c
5
H1
3
e
c
b
d
e
d
f
e
b
H2
b
H1
3
f
a
b
c
d
e
Outdoor unit
VRV DX indoor unit
Multi BS unit
LT Hydrobox unit
HT Hydrobox unit
Pipe
Longest pipe from the outdoor
unit or the last multi-outdoor
piping branch (1+2, 1+3, 1+5)
Longest pipe after the first
branch (2, 3, 5)
In case of a multi-outdoor setup:
longest pipe from the outdoor
unit to the last multi-outdoor
piping branch (4)
Total pipe length
(a)
(b)
H4
H2
b
b
a
b
c
d
e
f
Maximum length (actual/
equivalent)
135 m/160 m(a)
Outdoor unit
VRV DX indoor unit
Multi BS unit
BS unit
EKEXV kit
AHU
Pipe
40 m/—
10 m/13 m
300 m/500 m(b)
If the equivalent piping length is more than 90 m, size up
the main liquid piping according to "5.3.2 To select the
piping size" on page 13.
In this case, both are actual piping lengths: outdoor units
≤20 HP / outdoor units >20 HP.
Longest pipe from the outdoor
unit or the last multi-outdoor
piping branch (1+2, 1+3, 1+5)
Maximum length (actual/
equivalent)
135 m/160 m(a)
Longest pipe after the first
branch (2, 3, 5)
40 m/—
In case of a multi-outdoor setup:
longest pipe from the outdoor
unit to the last multi-outdoor
piping branch (4)
10 m/13 m
Total pipe length
(a)
5.3.8
500 m/—
If the equivalent piping length is more than 90 m, size up
the main liquid piping according to "5.3.2 To select the
piping size" on page 13.
Multiple outdoor units: Possible layouts
▪ The piping between the outdoor units must be routed level or
slightly upward to avoid the risk of oil retention into the piping.
Pattern 1
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Pattern 2
a
b
a
b
a
b
a
b
Installer and user reference guide
19
5 Preparation
NOTICE
a
a
b
b
a
b
X
O
There are restrictions on the refrigerant pipe connection
order between outdoor units during installation in case of a
multiple outdoor unit system. Install according to following
restrictions. The capacities of outdoor units A, B and C
must fulfill the following restriction conditions: A≥B≥C.
To indoor unit
Piping between outdoor units
Not allowed
Allowed
A
▪ To avoid the risk of oil retention to the outmost outdoor unit,
always connect the stop valve and the piping between outdoor
units as shown in the 4 correct possibilities of the figure below.
a b
B
C
c
a To indoor units
b Outdoor unit multi connecting piping kit (first branch)
c Outdoor unit multi connecting piping kit (second branch)
a
b
b
b
5.4
Preparing electrical wiring
5.4.1
About electrical compliance
This equipment complies with:
a
b
b
a
b
a
a
b
▪ EN/IEC 61000‑3‑11 = European/International Technical
Standard setting the limits for voltage changes, voltage
fluctuations and flicker in public low-voltage supply systems for
equipment with rated current ≤75 A.
b
≥200 mm
b
▪ EN/IEC 61000‑3‑11 provided that the system impedance Zsys is
less than or equal to Zmax at the interface point between the user's
supply and the public system.
▪ 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 system impedance Zsys less than or equal to Zmax.
a
a
a
a
b
X
O
To indoor unit
Oil collects to the outmost outdoor unit when the system
stops
Not allowed
Allowed
▪ If the piping length between the outdoor units exceeds 2 m, create
a rise of 200 mm or more in the suction gas line and the high
pressure/low pressure gas line within a length of 2 m from the kit.
If
▪ 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.
Then
≤2 m
b
a
Non-continuous heating
≤2 m
≥200 mm
a
a
b
Model
Zmax(Ω)
Minimum Ssc
value (kVA)
REMQ5
—
1216
REYQ8
—
1216
REYQ10
—
564
REYQ12
—
615
REYQ14
—
917
REYQ16
—
924
REYQ18
—
873
REYQ20
—
970
>2 m
≤2 m
To indoor unit
Piping between outdoor units
b
≤2 m
≥200 mm
>2 m
>2 m
Continuous heating
Model
Installer and user reference guide
20
Zmax(Ω)
Minimum Ssc
value (kVA)
REYQ10
—
2432
REYQ13
—
2432
REYQ16
—
2432
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
Continuous heating
Model
Continuous heating
Zmax(Ω)
Minimum Ssc
value (kVA)
REYQ18
—
1780
REYQ20
—
1831
Model
Minimum
circuit
ampacity
Recommended
fuses
REYQ20
36.0 A
50 A
42.0 A
63 A
REYQ22
—
1179
REYQ22
REYQ24
—
2140
REYQ24
47.0 A
63 A
1532
REYQ26
49.0 A
63 A
1539
REYQ28
53.0 A
63 A
57.0 A
80 A
REYQ26
—
REYQ28
—
REYQ30
—
1488
REYQ30
REYQ32
—
1848
REYQ32
64.0 A
80 A
1797
REYQ34
68.0 A
80 A
1894
REYQ36
72.0 A
80 A
72.0 A
100 A
REYQ34
—
REYQ36
—
REYQ38
—
2704
REYQ38
REYQ40
—
2052
REYQ40
78.0 A
100 A
2412
REYQ42
85.0 A
100 A
2463
REYQ44
85.0 A
100 A
92.0 A
100 A
REYQ42
—
REYQ44
—
REYQ46
—
2765
REYQ46
REYQ48
—
2772
REYQ48
96.0 A
125 A
2721
REYQ50
100.0 A
125 A
2670
REYQ52
104.0 A
125 A
2619
REYQ54
108.0 A
125 A
REYQ50
—
REYQ52
—
REYQ54
—
For all models:
INFORMATION
▪ Phase and frequency: 3N~ 50 Hz
Multi units are standard combinations.
▪ Voltage: 380-415 V
5.4.2
Safety device requirements
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.
▪ Transmission line section: 0.75~1.25 mm2, maximum length is
1000 m. If the total transmission wiring exceeds these limits, it
may result in communication error.
For non-standard combinations
For standard combinations
Calculate the recommended fuse capacity
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Formula
Calculate, by adding the minimum circuit amps of each
used unit (according to the table above), multiply the
result by 1.1 and select the next higher recommended
fuse capacity.
Example
Combining the REYQ30 by using the REYQ8,
REYQ10, and REYQ12.
INFORMATION
Multi units are standard combinations.
▪ Minimum circuit ampacity of the REYQ8=15.0 A
Non-continuous heating
Model
Minimum
circuit
ampacity
Recommended
fuses
REMQ5
15.0 A
20 A
REYQ8
15.0 A
20 A
REYQ10
21.0 A
25 A
REYQ12
21.0 A
32 A
REYQ14
28.0 A
32 A
REYQ16
32.0 A
40 A
REYQ18
36.0 A
40 A
REYQ20
40.0 A
50 A
▪ Minimum circuit ampacity of the REYQ10=22.0 A
▪ Minimum circuit ampacity of the REYQ12=24.0 A
Accordingly, the minimum circuit ampacity of the
REYQ30=15.0+22.0+24.0=61.0 A
Multiplying the above result by 1.1
(61.0 A×1.1)=67.1 A, so the recommended fuse
capacity would be 80 A.
NOTICE
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
Continuous heating
Model
Minimum
circuit
ampacity
Recommended
fuses
REYQ10
30.0 A
40 A
REYQ13
30.0 A
40 A
REYQ16
30.0 A
40 A
REYQ18
36.0 A
50 A
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6
Installation
6.1
Overview: Installation
This chapter describes what you have to do and know on-site to
install the system.
It contains information about:
Installer and user reference guide
21
6 Installation
▪ Opening the units
NOTICE
▪ Mounting the outdoor unit
When closing the electrical component box cover, make
sure that the sealing material on the lower back side of the
cover is not caught and bend towards the inside.
▪ Connecting the refrigerant piping
▪ Checking the refrigerant piping
▪ Charging refrigerant
a
b
▪ Connecting the electrical wiring
c
6.2
Opening the units
6.2.1
To open the outdoor unit
d
e
a Electrical component box cover
b Front side
DANGER: RISK OF ELECTROCUTION
c Power supply terminal block
DANGER: RISK OF BURNING
d Sealing material
To gain access to the unit, front plates need to be opened as follows:
e Moisture and dirt could enter
5~12 HP
X Not allowed
14~20 HP
O Allowed
6.3
Mounting the outdoor unit
6.3.1
To provide the installation structure
Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
NOTICE
14×
14×
When the installation height of the unit needs to be
increased, do not use stands to only support the corners.
Once the front plates open, the electrical component box can be
accessed. See "6.2.2 To open the electrical component box of the
outdoor unit" on page 22.
For service purposes, the push buttons on the main PCB need to be
accessed. To access these push buttons, the electrical component
box cover does not need to be opened. See "7.2.3 To access the
field setting components" on page 39.
To open the electrical component box of
the outdoor unit
NOTICE
Do not apply excessive force when opening the electronic
component box cover. Excessive force can deform the
cover, resulting in entering of water to cause equipment
failure.
*
mm
▪ The preferred installation is on a solid longitudinal foundation
(steel beam frame or concrete). The foundation must be larger
than the grey marked area.
≥AB
AA
≤613
729
14~20 HP
Installer and user reference guide
22
(mm)
a
6×
SW8
mm
Not allowed
Allowed (* = preferred installation)
a
SW8
00
▪ The height of the foundation must at least be 150 mm from the
floor. In heavy snowfall areas, this height should be increased,
depending on the installation place and condition.
5~12 HP
2×
≥1
≥929
6.2.2
X
O
00
≥1
Minimum foundation
Anchor point (4×)
HP
AA
AB
5~12
766
992
14~20
1076
1302
▪ Fasten the unit in place using four foundation bolts M12. It is best
to screw in the foundation bolts until their length remains 20 mm
above the foundation surface.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
20 mm
▪ Routing and connecting the refrigerant piping to the outdoor unit
▪ Protecting the outdoor unit against contamination
▪ Connecting the refrigerant piping to the indoor units (see the
installation manual of the indoor units)
NOTICE
▪ Prepare a water drainage channel around the
foundation to drain waste water from around the unit.
During heating operation and when the outdoor
temperatures are negative, the drained water from the
outdoor unit will freeze up. If the water drainage is not
taken care of, the area around the unit might be very
slippery.
▪ When installed in a corrosive environment, use a nut
with plastic washer (a) to protect the nut tightening part
from rust.
▪ Connecting the multi-connection piping kit
▪ Connecting the refrigerant branching kit
▪ Keeping in mind the guidelines for:
▪ Brazing
▪ Using the stop valves
▪ Removing the pinched pipes
6.4.3
To route the refrigerant piping
Installation of refrigerant piping is possible as front connection or
side connection (when taken out from the bottom) as shown in the
figure below.
a
6.4
Connecting the refrigerant piping
6.4.1
Precautions when connecting refrigerant
piping
c
a
a
b
c
NOTICE
Make sure refrigerant piping installation complies with
applicable legislation. In Europe, EN378 is the applicable
standard.
b
For side connections, the knockout hole on the bottom plate should
be removed:
a
b
NOTICE
Make sure the field piping and connections are not
subjected to stress.
Left-side connection
Front connection
Right-side connection
c
a
b
c
WARNING
During tests, NEVER pressurize the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).
Large knockout hole
Drill
Points for drilling
NOTICE
Precautions when making knockout holes:
WARNING
▪ Avoid damaging the casing.
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ 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.
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
▪ Toxic gas may be produced if refrigerant gas comes
into contact with fire.
WARNING
Always recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
Only use phosphoric acid deoxidised seamless copper.
6.4.4
To connect the refrigerant piping to the
outdoor unit
INFORMATION
All local inter unit piping are field supplied except the
accessory pipes.
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
6.4.2
About connecting the refrigerant piping
Before connecting the refrigerant piping, make sure the outdoor and
indoor units are mounted.
Connecting the refrigerant piping involves:
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
23
6 Installation
6.4.6
NOTICE
Precautions when connecting field piping. Add brazing
material as shown in the figure.
≤Ø25.4
>Ø25.4
Multiple outdoor units: Knockout holes
Connection
Remove the front plate knockout holes to
connect.
Bottom connection
Remove the knockout holes on the bottom
frame and route the piping under the bottom.
1
1
2
1
Description
Front connection
2
1
NOTICE
▪ Be sure to use the supplied accessory pipes when
carrying out piping work in the field.
▪ 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.
Connection from the stop valves to the field piping can be done by
using accessory pipes supplied as accessory.
The connections to the branch kits are the responsibility of the
installer (field piping).
6.4.5
To connect the multi connection piping kit
6.4.7
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.
NOTICE
Improper installation may lead to malfunction of the
outdoor unit.
▪ Install the joints horizontally, so that the caution label (a) attached
to the joint comes to the top.
b
c
▪ Do not tilt the joint more than 7.5° (see view A).
▪ Do not install the joint vertically (see view B).
±30°
7.5°
7.5°
A
A
a
B
a
a
B
a
X
O
a
b
c
Caution label
Not allowed
Allowed
▪ Make sure that the total length of the piping connected to the joint
is absolute straight for more than 500 mm. Only if a straight field
piping of more than 120 mm is connected, more than 500 mm of
straight section can be ensured.
6.4.8
Horizontal surface
Refnet joint mounted vertically
Refnet joint mounted horizontally
To protect against contamination
Protect the piping as described in the following table to prevent dirt,
liquid or dust from entering the piping.
Unit
>12
0
>50 mm
0m
m
a
Outdoor unit
Indoor unit
Installation period
Protection method
>1 month
Pinch the pipe
<1 month
Pinch or tape the pipe
Regardless of the
period
Block all gaps in the holes for passing out piping and wiring using
sealing material (field supply) (otherwise the capacity of the unit will
drop and small animals may enter the machine).
Example: passing piping out through the front.
Installer and user reference guide
24
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
a
b
a
a
Close the areas marked with "
routed from the front panel.)
e
". (When the piping is
d
▪ Only use clean pipes.
▪ Hold the pipe end downwards when removing burrs.
▪ Cover the pipe end when inserting it through a wall, to prevent
dust and/or particles entering the pipe.
6.4.9
To braze the pipe end
▪ 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.
▪ Set the nitrogen pressure to 20 kPa (just enough so it can be felt
on the skin) with a pressure-reducing valve.
a
b
c
d
e
c
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
When the stop valve cannot be turned any further, stop turning.
Result: The valve is now open.
To fully open the Ø19.1 mm~Ø25.4 mm stop valve, turn the
hexagonal wrench until a torque between 27 and 33 N•m is
achieved.
Inadequate torque may cause leakage of refrigerant and breakage of
the stop valve cap.
f
a
b
c
d
e
f
f
Refrigerant piping
Part to be brazed
Taping
Manual valve
Pressure-reducing valve
Nitrogen
▪ Do NOT use anti-oxidants when brazing pipe joints.
Residue can clog pipes and break equipment.
2
1
▪ 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.
6.4.10
4
NOTICE
Pay attention that mentioned torque range is applicable for
opening Ø19.1~Ø25.4 mm stop valves only.
Using the stop valve and service port
To handle the stop valve
3
To close the stop valve
▪ Make sure to keep all stop valves open during operation.
1
Remove the stop valve cover.
▪ The figure below shows the name of each part required in
handling the stop valve.
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.
▪ The stop valve is factory closed.
Result: The valve is now closed.
a
Closing direction:
b
c
d
a
b
c
d
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
To handle the stop valve cover
▪ The stop valve cover is sealed where indicated by the arrow. Take
care not to damage it.
▪ After handling the stop valve, make sure to tighten the stop valve
cover securely. For the tightening torque, refer to the table below.
▪ Check for refrigerant leaks after tightening the stop valve cover.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
25
6 Installation
A
B
C
D
3
Valve A
Valve B
Valve C
Valve D
Recover gas and oil from the pinched piping by using a
recovery unit.
To handle the service port
CAUTION
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
Do not vent gases into the atmosphere.
▪ After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
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 liquid-, gas-, and high pressure/low
pressure gas stop valve pipes along the black line. Use an
appropriate tool (e.g. a pipe cutter, a pair of nippers).
▪ 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
Cap (valve
lid)
Service
port
13.5~16.5
11.5~13.9
4 mm
Ø9.5
5.4~6.6
Ø12.7
8.1~9.9
Ø15.9
13.5~16.5
6 mm
23.0~27.0
Ø19.1
27.0~33.0
8 mm
22.5~27.5
18.0~22.0
Ø25.4
6.4.11
WARNING
To remove the pinched pipes
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
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.
Never remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Use the following procedure to remove the pinched piping:
1
Remove the valve cover and make sure that the stop valves are
fully closed.
6
Wait until all oil is dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
6.5
Checking the refrigerant piping
6.5.1
About checking the refrigerant piping
a
b
c
d
a
b
c
d
2
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
p<
p>
A
a
Refrigerant piping works are
finished?
C
B
f
d
N2
R410A
b
c
The indoor units and/or
outdoor unit were already
powered ON?
No
Use procedure:
"Method 1: Before power ON
(regular method)".
Yes
Use procedure:
"Method 2: After power ON".
e
a
b
c
d
e
f
g
h
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
High pressure/low pressure gas line stop valve
Installer and user reference guide
26
Finish piping work.
Yes
D
g
h
No
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.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
Therefore, there will be explained 2 methods for initial installation,
leak test and vacuum drying.
6.5.3
Checking refrigerant piping: Setup
p<
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.
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 40). 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.
A
a
R410A
b
c
NOTICE
Wait until the outdoor unit has finished the initialisation to
apply setting [2‑21].
▪ 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.
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
High pressure/low pressure gas line stop valve
Valve A
Valve B
Valve C
Valve D
Valve
State of valve
Valve A
Open
Valve B
Open
Valve C
Open
Valve D
Open
Liquid line stop valve
Close
Gas line stop valve
Close
High pressure/low pressure gas
line stop valve
Close
NOTICE
All piping inside the unit has been factory tested for leaks.
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.
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.
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 26).
NOTICE
Make sure that all (field supplied) field piping valves are
OPEN (not outdoor unit stop valves!) before you start leak
test and vacuuming.
For more information on the state of the valves, refer to
"6.5.3 Checking refrigerant piping: Setup" on page 27.
D
h
g
f
e
a
b
c
d
e
f
g
h
A
B
C
D
Make sure that all indoor units connected to the outdoor
unit are powered on.
Checking the refrigerant piping involves:
B
d
N2
NOTICE
Leak test and vacuum drying
C
p>
6.5.4
To perform a leak test
The leak test must satisfy the specifications of EN378‑2.
6.5.2
Checking refrigerant piping: General
guidelines
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 27).
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 (5 Torr absolute).
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) 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.
3
Should the pressure rise, the system may either contain
moisture (see vacuum drying below) or have leaks.
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).
NOTICE
2
Do not purge the air with refrigerants. Use a vacuum pump
to evacuate the installation.
Test for leaks by applying a bubble test solution to all piping
connections.
3
Discharge all nitrogen gas.
NOTICE
Make sure the pump oil does not flow oppositely into the
system while the pump is not working.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
27
6 Installation
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).
6.5.5
▪ 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.
b
a
To perform vacuum drying
NOTICE
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.
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 26 for more
information.
a
b
Insulation material
Caulking etc.
6.7
Charging refrigerant
6.7.1
Precautions when charging refrigerant
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).
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
6.6
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 "6.7.2 About
charging refrigerant" on page 29 for more information.
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.
NOTICE
If the power of some units is turned off, the charging
procedure cannot be finished properly.
INFORMATION
NOTICE
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.
In case of a multiple outdoor system, turn on the power of
all outdoor units.
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.
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.
▪ 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.
▪ 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
Condensation might form on the surface of the insulation.
Installer and user reference guide
28
NOTICE
Before starting charging procedures, check if the
7‑segment display indication of the outdoor unit A1P PCB
is as normal (see "7.2.4 To access mode 1 or 2" on
page 40). If a malfunction code is present, see
"10.2 Solving problems based on error codes" on
page 51.
NOTICE
Make sure all connected indoor units are recognised (see
[1‑10] and [1‑39] in "7.2.7 Mode 1: Monitoring settings" on
page 41).
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
NOTICE
INFORMATION
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.
▪ Piping length is considered the distance from the
outdoor unit to the farthest indoor unit.
NOTICE
▪ In case of a multi-outdoor-unit system, add the sum of
the individual outdoor unit charge factors.
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) by pre-charging before the
automatic charging function can be started.
▪ When using more than one multi BS unit, add the sum
of the individual BS unit charge factors.
Model
B parameter (kg)
REMQ5+REYQ8+
0
REYQ10+REYQ12
REYQ14
1.3
REYQ16
1.4
REYQ18
4.7
Once vacuum drying is finished, additional refrigerant charging can
start.
REYQ20
4.8
There are two methods to charge additional refrigerant.
Model
6.7.2
About charging refrigerant
Method
Automatic charge
Manual charge
See
"6.7.6 Step 6a: To automatically charge
refrigerant" on page 33
"6.7.7 Step 6b: To manually charge
refrigerant" on page 34
INFORMATION
Adding refrigerant using the automatic refrigerant charging
function is not possible when Hydrobox units are
connected to the system.
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 actual automatic or
manual charging. This step is included in below procedure (see
"6.7.5 To charge refrigerant" on page 32). It can be skipped, but
charging will take longer then.
A flow chart is available which gives an overview of the possibilities
and actions to be taken (see "6.7.4 To charge refrigerant: Flow
chart" on page 30).
6.7.3
To determine the additional refrigerant
amount
INFORMATION
When using FXTQ indoor units, different requirements
apply. See "5.3.5 Requirements in case of FXTQ indoor
units" on page 16.
NOTICE
The refrigerant charge of the system must be less than
100 kg. This means that in case the calculated total
refrigerant charge is equal to or more than 95 kg you must
divide your multiple outdoor system into smaller
independent systems, each containing less than 95 kg
refrigerant charge. For factory charge, refer to the unit
name plate.
C parameter (kg)
BS1Q10
0.05
BS1Q16
0.1
BS1Q25
0.2
BS4Q
0.3
BS6Q
0.4
BS8Q
0.5
BS10Q
0.7
BS12Q
0.8
BS16Q
1.1
When using metric piping, please take into account following table
concerning the weight factor to be allocated. It should be substituted
in the formula for R.
Inch piping
Weight factor
Size (Ø) (mm)
Weight factor
6.4
0.022
6
0.018
9.5
0.059
10
0.065
12.7
0.12
12
0.097
15.9
0.18
15
0.16
—
—
16
0.18
19.1
0.26
18
0.24
22.2
0.37
22
0.35
When selecting indoor unit, following table with connection ratio
limitation has to be respected. More detailed information can be
found in technical engineering data.
Indoor
units used
Maximum
number
allowed(a)
Total
capacity
CR
VRV DX
only(c)
64
50~130%
VRV DX +
Hydrobox
32
Additional refrigerant to be charged=R (kg). R should be rounded off
in units of 0.1 kg.
R=[(X1×Ø22.2)×0.37+(X2×Ø19.1)×0.26+(X3×Ø15.9)×0.18+(X4×Ø12.7
)×0.12+(X5×Ø9.5)×0.059+(X6×Ø6.4)×0.022]×1.04+(A+B+C)
X1...6 =Total length (m) of liquid piping size at Øa
A parameter
If the total indoor unit capacity connection ratio (CR)>100%, charge
an additional 0.5 kg of refrigerant per outdoor unit.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Metric piping
Size (Ø) (mm)
Allowable capacity CR
per indoor unit type
50~200%(b)
Type
Capacity
CR
VRV DX
50~130%
VRV DX
without BS
unit (coolingonly)(d)
0~50%
VRV DX
50~110%
VRV DX
without BS
unit (coolingonly)(d)
0~50%
LT + HT
Hydrobox
0~100%
Installer and user reference guide
29
6 Installation
Indoor
units used
VRV DX +
AHU
6.7.4
Maximum
number
allowed(a)
Total
capacity
CR
64
50~110%
(a)
(b)
Allowable capacity CR
per indoor unit type
Type
Capacity
CR
VRV DX
50~110%
VRV DX
without BS
unit (coolingonly)(d)
0~50%
AHU
0~110%
(c)
(d)
Excluding BS units and EKEXV kits.
The total capacity of VRV DX indoor units and LT
Hydrobox units is maximum 130%.
Other combinations than those mentioned above are not
allowed.
Cooling-only VRV indoor units cannot be combined with HT
Hydrobox units.
INFORMATION
For final charge adjustment in the test laboratory, please
contact your local dealer.
To charge refrigerant: Flow chart
For more information, see "6.7.5 To charge refrigerant" on page 32.
Pre-charging refrigerant
Step 1
Calculate additional refrigerant charge amount: R (kg)
p<
A
Step 2+3
• Close valves C, D and A
• Open valve B to the liquid line
• Execute pre-charging amount: Q (kg)
• Disconnect the manifold from the gas line and the high pressure/low
pressure gas line
R=Q
Step 4a
• Close valve B
• Charging is finished
• Fill in the amount on the additional
refrigerant charge label
• Input the additional refrigerant amount via
setting [2-14]
• Go to test run
N2
C
p>
B
R410A
R<Q
Refrigerant overcharge happened, recover
refrigerant to reach R=Q
D
R>Q
Step 4b
Close valve B
Continued on next page >>
Installer and user reference guide
30
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
Charging refrigerant
<< Continuation of previous page
R>Q
p<
Step 5
• Connect valve A to the refrigerant charge port (d)
• Open all outdoor unit stop valves
A
p>
d
R410A
Step 6
Proceed with automatic or manual charge
Automatic charge
Manual charge
Step 6a
• Push 1x BS2: "888"
• Push BS2 for more than 5 seconds "t01" pressure equalisation
Step 6b
Activate field setting [2-20]=1
Unit will start manual refrigerant charging operation.
Depending on ambient conditions, the unit will decide to perform autocharge
operation in heating or cooling mode.
• Open valve A
• Charge remaining amount of refrigerant P (kg)
R=Q+P
•
•
•
•
•
•
Close valve A
Push BS3 to stop manual charging
Charging is finished
Fill in the amount on the additional refrigerant charge label
Input the additional refrigerant amount via setting [2-14]
Go to test run
Continued on next page >>
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
31
6 Installation
<< Continuation of previous page
Heating charging
Cooling charging
("t22" startup control)
("t23" waiting for stable heating)
("t02" startup control)
("t03" waiting for stable cooling)
"t23" is flashing
• Push BS2 within 5 minutes
• Open valve A
"t03" is flashing
• Push BS2 within 5 minutes
• Open valve A
Display show "t23" and low pressure value with an interval of 1 second.
• Add additional refrigerant amount P (kg)
• Close valve A
• Push BS3 to stop operation
• Ending code "t26" will appear
Display show "t03" and low pressure value with an interval of 1 second.
Refrigerant will be charged automatically.
"pe"=charging nearly finished
"p9"=charging finished
OR
P (kg) was added during autocharge.
R=Q+P
• Push BS2
• TA check will be performed
•
•
•
•
•
•
•
•
•
•
"t0X" will appear
Push BS1
Charging is finished
Fill in the amount on the
additional refrigerant charge
label
• Input the additional refrigerant
amount via setting [2-14]
• Go to test run
6.7.5
Following codes appear:
"e-2" (indoor temperature out of
range) and
"e-3" (outdoor temperature out of
range)
• Push BS1 to leave program
• Charging is finished
• Fill in the amount on the
additional refrigerant charge
label
• Input the additional refrigerant
amount via setting [2-14]
• Go to test run
During grey conditions
If following codes appear:
"e-2" (indoor temperature out of range) and
"e-3" (outdoor temperature out of range)
In this case, perform automatic charging procedure again.
3
To charge refrigerant
Follow the steps as described below and take into account whether
you want to use the automatic charge function or not.
Pre-charging refrigerant
Pre-charging can be done without compressor operation, by
connecting the refrigerant bottle to the service port of the liquid
stop valve (open valve B). Make sure that all outdoor unit stop
valves, as well as valves A, C, and D are closed.
NOTICE
1
Calculate the additional amount of refrigerant to be added using
the formula mentioned in "6.7.3 To determine the additional
refrigerant amount" on page 29.
2
The first 10 kg of additional refrigerant can be pre-charged
without outdoor unit operation.
If
Close valve A
Push BS1 to leave program
Charging is finished
Fill in the amount on the additional refrigerant charge label
Input the additional refrigerant amount via setting [2-14]
Go to test run
During pre-charging, the refrigerant is charged through the
liquid line only. Close valves C, D, and A and disconnect
the manifold from the gas line and the high pressure/low
pressure gas line.
Then
The additional refrigerant amount Perform steps 3~4.
is smaller than 10 kg
The additional refrigerant charge Perform steps 3~6.
is larger than 10 kg
Installer and user reference guide
32
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
p<
A
a
C
p>
B
d
N2
R410A
b
c
NOTICE
▪ 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.
▪ 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.
e
a
b
c
d
e
f
g
h
A
B
C
D
4
D
h
g
f
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
High pressure/low pressure gas line stop valve
Valve A
Valve B
Valve C
Valve D
▪ In order to ensure uniform refrigerant distribution, it
may take the compressor ±10 minutes to start up after
the unit has started operation. This is not a malfunction.
6
Proceed with one of the following:
6a
"6.7.6 Step 6a: To automatically charge refrigerant" on
page 33
6b
"6.7.7 Step 6b: To manually charge refrigerant" on page 34
Do one of the following:
INFORMATION
Then
If
After charging refrigerant:
4a
Close valve B and disconnect
The calculated additional
refrigerant amount is reached the manifold from the liquid
line.
by above pre-charging
procedure
4b
The total amount of
refrigerant could not be
charged by pre-charging
▪ Record the additional refrigerant amount on the
refrigerant label provided with the unit and attach it to
the backside of the front panel.
▪ Input the additional refrigerant amount into the system
via setting [2‑14].
Close valve B, disconnect the
manifold from the liquid line,
and perform steps 5~6.
▪ Perform
the
test
procedure
"8 Commissioning" on page 48.
described
in
INFORMATION
If the total additional refrigerant amount was reached in
step 4 (by pre-charging only), record the amount of
refrigerant that was added on the additional refrigerant
charge label provided with the unit and attach it on the
back side of the front panel.
6.7.6
INFORMATION
The automatic refrigerant charging has limits as described
below. Out of these limits, the system cannot operate the
automatic refrigerant charging:
Additionally, input the additional refrigerant amount into the
system via setting [2-14].
Perform the test procedure
"8 Commissioning" on page 48.
as
described
in
▪ Outdoor temperature: 0~43°C DB.
▪ Indoor temperature: 10~32°C DB.
Charging refrigerant
5
▪ Total indoor unit capacity: ≥80%.
After pre-charging, connect valve A to the refrigerant charge
port and charge the remaining additional refrigerant through this
port. Open all outdoor unit stop valves. At this point, valve A
must remain closed!
p<
p>
A
d
b
The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the automatic refrigerant
charge operation mode.
Depending on the ambient limitation conditions (see above), the unit
will automatically decide which operation mode will be used to fulfill
the automatic refrigerant charge: cooling or heating. If above
conditions are fulfilled, cooling operation will be selected. If not,
heating.
Procedure
R410A
a
Step 6a: To automatically charge
refrigerant
c
a
b
c
d
A
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Refrigerant charge port
Valve A
INFORMATION
For a multi outdoor unit system, it is not required to
connect all charge ports to a refrigerant tank.
The refrigerant will be charged with ±22 kg in 1 hour time
at an outdoor temperature of 30°C DB or with ±6 kg at an
outdoor temperature of 0°C DB.
If you need to speed up in case of a multiple outdoor
system, connect the refrigerant tanks to each outdoor unit.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
1
Idle (default) screen is shown.
2
Push BS2 once.
Result: Indication "
3
".
Push BS2 for more than 5 seconds, wait while the unit is
preparing for operation. 7‑segment display indication: "
" (pressure control is executed):
If
Then
Heating operation is
started
" till "
" will be
Indication "
displayed (start up control; waiting
stable heating operation).
Cooling operation is
started
" till "
" will be
Indication "
displayed (start up control; waiting
stable cooling operation).
Installer and user reference guide
33
6 Installation
4
When "
" or "
" starts flashing (ready for charging), push
BS2 within 5 minutes. Open valve A. If BS2 is not pushed within
5 minutes, a malfunction code will appear:
If
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 "10.2 Solving
problems based on error codes" on page 51 and solve
the malfunction accordingly. Resetting the malfunction
can be done by pushing BS1. The procedure can be
restarted from "6.7.6 Step 6a: To automatically charge
refrigerant" on page 33.
Then
Heating operation
"
" will be flashing. Push BS2 to
restart the procedure.
Cooling operation
Malfunction code " " will appear. Push
BS1 to abort and restart the procedure.
▪ Aborting the automatic refrigerant charge is possible by
pushing BS1. The unit will stop and return to idle
condition.
Heating (middle 7‑segment display indicates " ")
Charging will continue, the 7‑segment display indication
intermittently shows the current low pressure value and the status
indication "
".
When the remaining additional refrigerant amount is charged, close
valve A immediately and push BS3 to stop charging operation.
After BS3 is pushed, the ending code "
" will appear. When BS2
is pushed, the unit will check whether the ambient conditions are
favourable to execute the test run.
Test run including detailed refrigerant status check is required to use
the leak detection functionality. More information, see
"8 Commissioning" on page 48.
If
"
", "
appears
"
", or "
Then
", or "
"
" appears
Push BS1 to finish the automatic
charging function procedure. The
ambient conditions are favourable to
execute the test run.
The ambient conditions are NOT
favourable to execute the test run. Push
BS1 to finish the automatic charging
procedure.
Perform the test procedure as described in "8 Commissioning" on
page 48.
6.7.7
The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the manual refrigerant
charge operation mode:
1
Take all the precautions mentioned in "7 Configuration" on
page 39 and "8 Commissioning" on page 48 into account.
2
Turn on the power of the indoor units and outdoor unit.
3
Activate outdoor unit setting [2‑20]=1 to start manual refrigerant
charge mode. Refer to "7.2.8 Mode 2: Field settings" on
page 42 for details.
Result: The unit will start operation.
4
Valve A can be opened. Charging of remaining additional
refrigerant can be done.
5
When the remaining calculated additional refrigerant amount is
added, close valve A and push BS3 to stop the manual
refrigerant charging procedure.
INFORMATION
In case a malfunction code occurred during this automatic
charging procedure, the unit will stop and indicate "
"
flashing. Push BS2 to restart the procedure.
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.
Cooling (middle 7‑segment display indicates " ")
Automatic charging will continue, the 7‑segment display indication
shows the current low pressure value and the status indication "
" intermittent.
If the 7‑segment display indication/user interface of indoor unit
shows " " code, charging is almost finished. When the unit stops
operating, close valve A immediately and check whether the
7‑segment display indication/user interface of indoor unit shows "
". This indicates the automatic charging in cooling program was
finished successfully.
INFORMATION
When the charging amount is little, the " " code may not
be displayed, but instead the " " code will be displayed
immediately.
When the required (calculated) additional refrigerant
amount is already charged before " " or " " indication
appears, close valve A and wait till " " is displayed.
Step 6b: To manually charge refrigerant
6
Perform
the
test
procedure
"8 Commissioning" on page 48.
as
described
in
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 "6.7.8 Error
codes when charging refrigerant" on page 35 and
solve the malfunction accordingly. Resetting the
malfunction can be done by pushing BS3. The
procedure can be restarted from "6.7.7 Step 6b: To
manually charge refrigerant" on page 34.
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
If during the cooling operation for the automatic refrigerant charge
the ambient conditions go beyond the allowable for this operation
mode, the unit will indicate on the 7‑segment display "
" in case
indoor temperature is out of range or "
" in case the outdoor
temperature is out of range. In this case, when the additional
refrigerant charging was not finished, step "6.7.6 Step 6a: To
automatically charge refrigerant" on page 33 has to be repeated.
Installer and user reference guide
34
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
6.7.8
c
d
e
Error codes when charging refrigerant
Code
Cause
Solution
Unusual low pressure on
suction line
f
Close valve A
immediately. Push BS3 to
reset. Check following
items before retrying
autocharge procedure:
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.
▪ Check if all gas-side
stop valves are opened
correctly.
Freeze-up prevention
indoor unit
2
▪ Check if the air inlet and
outlet of the indoor unit
are not obstructed.
Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
6.8
Connecting the electrical wiring
6.8.1
Precautions when connecting electrical
wiring
Close valve A
immediately. Push BS3 to
reset. Retry autocharge
procedure.
Outdoor unit is out of
Retry when ambient
temperature range for leak conditions are satisfied.
detection operation
6.7.9
Refer to requirements to
be able to execute leak
detection operation.
Close valve A
immediately. Confirm the
malfunction code and take
corresponding action,
"10.2 Solving problems
based on error codes" on
page 51.
—
Other
malfunction
code
Checks after charging refrigerant
▪ Are all stop valves open?
▪ Is the amount of refrigerant, that has been added, recorded on the
refrigerant charge label?
NOTICE
WARNING
All field wiring and components must be installed by a
licensed electrician and must comply with the applicable
legislation.
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, shall be installed in the fixed wiring.
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do not come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
Operating with the stop valves closed will damage the
compressor.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
To fix the fluorinated greenhouse gases
label
Fill in the label as follows:
a
Contains fluorinated greenhouse gases
f
DANGER: RISK OF ELECTROCUTION
Make sure to open all stop valves after (pre-) charging the
refrigerant.
6.7.10
1
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
▪ Check if the valve of the
refrigerant cylinder is
opened.
Retry when ambient
Indoor unit is out of
temperature range for leak conditions are satisfied.
detection operation
Indicates an indoor unit
which is not compatible
with leak detection
functionality is installed
(e.g. Hydrobox units, …)
Additional refrigerant amount charged
Total refrigerant charge
Greenhouse gas emissions of the total refrigerant charge
expressed as tonnes CO2-equivalent
GWP = Global warming potential
RXXX
1 =
kg
b
2 =
kg
c
1 + 2 =
kg
d
tCO2eq
e
GWP: XXX
2
1
GWP × kg
1000
a
b
=
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
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.
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
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
35
6 Installation
h
i
j
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
NOTICE
Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
6.8.3
About the electrical 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 25 mm.
NOTICE
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.
If the power supply has a missing or wrong N-phase,
equipment will break down.
▪ 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.
NOTICE
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
Never remove a thermistor, sensor, etc., when connecting
power wiring and transmission wiring. (If operated without
thermistor, sensor, etc., the compressor may break down.)
NOTICE
▪ 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.
▪ The reversed phase protection detector is designed to
stop the product in the event of an abnormality when
the product is started up.
▪ Replace two of the three phases (L1, L2, and L3)
during reverse-phase protection abnormality.
▪ 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.
Field piping can be routed from front or bottom of the unit (going left
or right). Refer to "6.4.3 To route the refrigerant piping" on page 23.
▪ Be sure to follow the limits below. If the unit-to-unit cables are
beyond these limits, it may result in malfunction of transmission:
▪ Maximum wiring length: 1000 m.
▪ Total wiring length: 2000 m.
▪ Maximum inter unit wiring length between outdoor units: 30 m.
▪ Transmission wiring to cool/heat selector: 500 m.
▪ Maximum number of branches: 16.
▪ Maximum number of independent interconnectable systems: 10.
▪ Up to 16 branches are possible for unit-to-unit cabling. No
branching is allowed after branching (see figure below).
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.
6.8.2
Cool/heat selector
Circuit breaker
Fuse
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
a
A
a
a
h
B
d
b
e
b
Field wiring: Overview
Field wiring consists of power supply (always including earth) and
indoor-outdoor communication (= transmission) wiring.
g
b
Example:
f
b
a
g
d
B
h
b
i
j
i
j
c
f
a
b
c
d
e
f
g
Installer and user reference guide
36
c
Field power supply (with earth leakage protector)
Main switch
Earth connection
Outdoor unit
Indoor unit
User interface
BS unit
b
e
g
c
b
f
a
b
c
d
e
f
g
h
Outdoor unit
Indoor unit + BS unit
Main line
Branch line 1
Branch line 2
Branch line 3
No branch is allowed after branch
Central user interface (etc...)
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
6 Installation
A
B
Knockout hole has to be removed. Close the hole to avoid
small animals or dirt from entering.
(a)
Outdoor/indoor transmission wiring
Master/slave transmission wiring
For the above wiring, always use vinyl cords with 0.75 to 1.25 mm2
sheath or cables (2-core wires). (3-core wire cables are allowable for
the cooler/heater changeover user interface only.)
5~12 HP
a
14~20 HP
a
b
b
d
c
Guidelines when knocking out knockout
holes
6.8.4
d
▪ To punch a knockout hole, hit on it with a hammer.
c
▪ After knocking out the holes, we recommend removing any burrs
and paint the edges and areas around the holes using repair paint
to prevent rusting.
d
▪ When passing electrical wiring through the knockout holes.
prevent damage to the wires by wrapping the wiring with
protective tape, putting the wires through field supplied protective
wire conduits at that location, or install suitable field supplied wire
nipples or rubber bushings into the knockout holes.
a
b
L1
L2
L3
N
c
d
c
c
d
a
b
c
d
6.8.5
Fix to the indicated plastic brackets using field supplied clamping
material.
Knockout hole
Burr
Remove burrs
If there are any possibilities that small animals enter the
system through the knockout holes, plug the holes with
packing materials (to be prepared on-site)
a
b
c
d
6.8.6
To route and fix the transmission wiring
Transmission wiring can be routed through the front side only. Fix it
to the upper mounting hole.
5~12 HP
Wiring between the units (indoor-outdoor) (F1/F2 left)
Internal transmission wiring (Q1/Q2)
Plastic bracket
Field supplied clamps
To connect the transmission wiring
The wiring from the indoor units must be connected to the F1/F2
(In‑Out) terminals on the PCB in the outdoor unit.
Tightening torque of the transmission wiring terminals:
14~20 HP
c
c
c
c
Screw size
Tightening torque (N•m)
M3.5 (A1P)
0.80~0.96
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
f
d
F1 F2 F1 F2 Q1Q2
c
A
d
a
A
d
b
A1P
F1 F2 F1 F2 Q1 Q2
b
a
A
a
b
c
d
Transmission wiring (possibility 1)(a)
Transmission wiring (possibility 2)(a). Fix to pipe insulation
with tie wraps.
Tie wrap. Fix to factory-mounted low voltage wiring.
Tie wrap.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
c
A1P
Q1 Q2
h
h
A1P
a
b
c
d
e
f
g
h
i
j
TO IN/D TO OUT/D
UNIT
UNIT
Q1 Q2
F1 F2
g
a
F1 F2 F1 F2
TO IN/D TO OUT/D
UNIT
UNIT
e
b
F1 F2 F1 F2
i
F1 F2
F1 F2
e
i
F1 F2
j
F1 F2
F1 F2
Unit A (master outdoor unit)
Unit B (slave outdoor unit)
Unit C (slave outdoor unit)
Outdoor unit PCB (A1P)
Master/slave transmission (Q1/Q2)
Outdoor/indoor transmission (F1/F2)
Outdoor unit/other system transmission (F1/F2)
BS unit
Indoor unit
Cooling-only VRV indoor unit / Heating-only Hydrobox unit
▪ The interconnecting wiring between the outdoor units in the same
piping system must be connected to the Q1/Q2 (Out Multi)
terminals. Connecting the wires to the F1/F2 terminals results in
system malfunction.
▪ The wiring for the other systems must be connected to the F1/F2
(Out-Out) terminals of the PCB in the outdoor unit to which the
interconnecting wiring for the indoor units is connected.
Installer and user reference guide
37
6 Installation
▪ The base unit is the outdoor unit to which the interconnecting
wiring for the indoor units is connected.
6.8.9
To connect the power supply
NOTICE
To finish the transmission wiring
6.8.7
Never connect the power supply to transmission wiring
terminal block. Otherwise the entire system may break
down.
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.
c
CAUTION
f
b
f
a
When connecting the power supply, the earth connection
must be made before the current-carrying connections are
established. When disconnecting the power supply, the
current-carrying connections must be separated before the
earth connection is. The length of the conductors between
the power supply stress relief and the terminal block itself
must be as such that the current-carrying wires are
tautened before the earth wire is in case the power supply
is pulled loose from the stress relief.
d
e
f
a
b
c
d
e
f
6.8.8
Liquid pipe
Gas pipe
Finishing tape
High pressure/low pressure gas pipe
Transmission wiring (F1/F2)
Insulator
Tightening torque for the terminal screws:
To route and fix the power supply
Screw size
M8 (Power terminal block)
NOTICE
Tightening torque (N•m)
5.5~7.3
M8 (Ground)
When routing earth wires, secure clearance of 25 mm or
more away from compressor lead wires. Failure to observe
this instruction properly may adversely affect correct
operation of other units connected to the same earth.
NOTICE
Recommendations when connecting the earth wire:
Wire it so that it comes through the cut out section of the
cup washer. (An improper earth connection may prevent a
good earthing from being achieved.)
The power supply wiring can be routed from the front and left side.
Fix it to the lower mounting hole.
5~12 HP
14~20 HP
The power supply must be clamped to the plastic bracket using field
supplied clamp material.
X1M
X1M
d
d
The green and yellow striped wire must be used for earthing only
(refer to the figure below).
5~12 HP
e
f
d
A
g
A
d
d
a c b
d
j
k
h
i
14~20 HP
e
f
c
ba
c
ba
a c b
A
a
b
c
d
(a)
Power supply (possibility 1)(a)
Power supply (possibility 2)(a)
Power supply (possibility 3)(a). Use conduit.
Tie wrap
Knockout hole has to be removed. Close the hole to avoid
small animals or dirt from entering.
d
a
b
c
d
e
f
g
h
i
j
k
Installer and user reference guide
38
g
j
k
h
i
Power supply (380~415 V - 3N~ 50Hz)
Fuse
Earth leakage protector
Earth wire
Power supply terminal block
Connect each power wire: RED to L1, WHT to L2, BLK to
L3 and BLU to N
Earth wire (GRN/YLW)
Clamp the power supply to the plastic bracket using a field
supplied clamp to prevent external force being applied to
the terminal.
Clamp (field supplied)
Cup washer
When connecting the earth wire, it is recommended to
perform curling.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
7 Configuration
Multiple outdoor units
To connect the power supply for multiple outdoor units to each other,
ring tongues have to be used. No bare cable can be used.
The ring washer which is standard provided should be removed in
that case.
Attaching both cables to the power supply terminal should be done
as indicated.
Mode 1 and 2
Mode
Description
Mode 1
Mode 1 can be used to monitor the current
situation of the outdoor unit. Some field setting
contents can be monitored as well.
(monitoring
settings)
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.
L1 L2 L2 N
7
Configuration
7.1
Overview: Configuration
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.
This chapter describes what you have to do and know to configure
the system after it is installed.
See also:
It contains information about:
▪ "7.2.4 To access mode 1 or 2" on page 40
▪ Making field settings
▪ "7.2.5 To use mode 1" on page 40
▪ Energy saving and optimum operation
▪ "7.2.6 To use mode 2" on page 40
▪ Using the leak detection function
▪ "7.2.7 Mode 1: Monitoring settings" on page 41
INFORMATION
▪ "7.2.8 Mode 2: Field settings" on page 42
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
7.2.2
Field setting components
Location of the 7‑segment displays, buttons and DIP switches:
a
DANGER: RISK OF ELECTROCUTION
7.2
Making field settings
7.2.1
About making field settings
Next to making field settings it is also possible to confirm the current
operation parameters of the unit.
Push buttons
Performing special actions (automatic refrigerant charge, test run,
etc.) and making field settings (demand operation, low noise, etc.)
happens by way of operating the push buttons.
See also:
DS1 DS2
BS1 BS2 BS3
X27A
BS1
BS2
BS3
DS1, DS2
a
b
To continue the configuration of the VRV IV heat recovery system, it
is required to give some input to the PCB of the unit. This chapter
will describe how manual input is possible by operating the push
buttons on the PCB and reading the feedback from the 7‑segment
displays.
Making settings is done via the master outdoor unit.
b
7.2.3
MODE: For changing the set mode
SET: For field setting
RETURN: For field setting
DIP switches
7‑segment displays
Push buttons
To access the field setting components
It is not required to open the complete electronic component box to
access the push buttons on the PCB and read out the 7‑segment
display(s).
To access you can remove the front inspection cover of the front
plate (see figure). Now you can open the inspection cover of the
electrical component box front plate (see figure). You can see the
three push buttons and the 3 7‑segment displays and DIP switches.
▪ "7.2.2 Field setting components" on page 39
▪ "7.2.3 To access the field setting components" on page 39
PC configurator
a
For VRV IV heat recovery system it is alternatively possible to make
several commissioning field settings through a personal computer
interface (for this, option EKPCCAB is required). The installer can
prepare the configuration (off-site) on PC and afterwards upload the
configuration to the system.
b
See also: "7.2.9 To connect the PC configurator to the outdoor
unit" on page 45.
c
2×
a
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Front plate
Installer and user reference guide
39
7 Configuration
b
c
Main PCB with 3 7‑segment displays and 3 push buttons
Electrical component box service cover
INFORMATION
If you get confused in the middle of the process, push BS1.
Then it returns to idle situation (no indication on 7‑segment
displays: blank, refer to "7.2.4 To access mode 1 or 2" on
page 40.
Operate the switches and push buttons with an insulated stick (such
as a closed ball-point pen) to avoid touching of live parts.
7.2.5
Make sure to re-attach the inspection cover into the electronic
component box cover and to close the front plate's inspection cover
after the job is finished. During operation of the unit the front plate of
the unit should be attached. Settings are still possible to be made
through the inspection opening.
NOTICE
To use mode 1
Mode 1 is used to set basic settings and to monitor the status of the
unit.
What
Changing and accessing
the setting in mode 1
Make sure that all outside panels, except for the service
cover on the electrical component box, are closed while
working.
Close the lid of the electrical component box firmly before
turning on the power.
How
Once mode 1 is selected (push BS1 1
time), you can select the wanted setting.
It is done by pushing BS2.
Accessing the selected setting's value is
done by pushing BS3 1 time.
To quit and return to the
initial status
Press BS1.
Example:
7.2.4
To access mode 1 or 2
Checking the content of parameter [1‑10] (to know how many indoor
units are connected to the system).
Initialisation: default situation
[A‑B]=C in this case defined as: A=1; B=10; C=the value we want to
know/monitor:
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.
Turn on the power supply of the outdoor unit and all indoor units.
When the communication between indoor units and outdoor unit(s) is
established and normal, the 7‑segment display indication state will
be as below (default situation when shipped from factory).
Stage
1
Make sure the 7‑segment display indication is as during normal
operation (default situation when shipped from factory).
2
Push BS1 1 time.
Result: Mode 1 is accessed:
3
Display
When turning on the power supply: flashing as
indicated. First checks on power supply are
executed (1~2 min).
Result: Mode 1 setting 10 is addressed:
4
When no trouble occurs: lighted as indicated
(8~10 min).
Ready for operation: blank display indication as
indicated.
Push BS3 1 time; the value which is returned (depending on the
actual field situation), is the amount of indoor units which are
connected to the system.
Result: Mode 1 setting 10 is addressed and selected, return
value is monitored information
5
To leave the monitoring function, push BS1 1 time.
Result: You will return to the default situation when shipped from
factory.
7‑segment display indications:
Off
Blinking
On
7.2.6
When above situation cannot be confirmed after 12 min, the
malfunction code can be checked on the indoor unit user interface
and the outdoor unit 7‑segment display. Solve the malfunction code
accordingly. The communication wiring should be checked at first.
To use mode 2
The master unit should be used to input field settings in
mode 2.
Mode 2 is used to set field settings of the outdoor unit and system.
What
Access
BS1 is used to change the mode you want to access.
Access
Mode 1
Push BS2 10 times.
Changing and accessing
the setting in mode 2
Action
Push BS1 one time.
Accessing the selected setting's value is
done by pushing BS3 1 time.
7‑segment display indication changes to:
Mode 2
Push BS1 for at least 5 seconds.
How
Once mode 2 is selected (push BS1 for
more than 5 seconds), you can select
the wanted setting. It is done by pushing
BS2.
To quit and return to the
initial status
Press BS1.
7‑segment display indication changes to:
Installer and user reference guide
40
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
7 Configuration
What
How
Changing the value of the ▪ Once mode 2 is selected (push BS1
selected setting in mode 2
for more than 5 seconds) you can
select the wanted setting. It is done
by pushing BS2.
Low noise operation reduces the sound generated by the unit
compared to nominal operating conditions.
[1‑1]
▪ Accessing the selected setting's value
is done by pushing BS3 1 time.
▪ Now BS2 is used to select the
required value of the selected setting.
▪ When the required value is selected,
you can define the change of value
by pushing BS3 1 time.
▪ Press BS3 again to start operation
according to the chosen value.
Example:
Checking the content of parameter [2‑18] (to define the high static
pressure setting of the outdoor unit's fan).
[A‑B]=C in this case defined as: A=2; B=18; C=the value we want to
know/change
1
3
Unit is currently not operating under low noise
restrictions.
1
Unit is currently operating under low noise
restrictions.
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.
[1‑2]
Shows the status of power consumption limitation operation.
Power consumption limitation reduces the power consumption of the
unit compared to nominal operating conditions.
Make sure the 7‑segment display indication is as during normal
operation (default situation when shipped from factory).
2
[1‑2]
5
Push BS1 for over 5 seconds.
Unit is currently not operating under power
consumption limitations.
Result: Mode 2 is accessed:
1
Unit is currently operating under power
consumption limitation.
Result: Mode 2 setting 18 is addressed:
Power consumption limitation can be set in mode 2. There are two
methods to activate power consumption limitation of the outdoor unit
system.
Push BS3 1 time; the value which is returned (depending on the
actual field situation), is the status of the setting. In the case of
[2‑18], default value is "0", which means the function is not
active.
▪ 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.
Result: Mode 2 setting 18 is addressed and selected, return
value is the current setting situation.
▪ The second method is to enable power consumption limitation
based on an external input. For this operation an optional
accessory is required.
To change the value of the setting, push BS2 till the required
value appears on the 7‑segment display indication. When
achieved, define the setting value by pushing BS3 1 time. To
start operation according to the chosen setting, confirm again
by pushing BS3.
6
Description
0
Push BS2 18 times.
4
Description
0
To leave the monitoring function, push BS1 2 times.
Result: You will return to the default situation when shipped from
factory.
7.2.7
Mode 1: Monitoring settings
[1‑0]
Shows whether the unit you check is a master, slave 1 or slave 2
unit.
Master, slave 1 and slave 2 indications are relevant in multiple
outdoor unit system configurations. The allocation of which outdoor
unit is master, slave 1 or slave 2 are decided by the unit's logic.
The master unit should be used to input field settings in
mode 2.
[1‑5] [1‑6]
Shows:
▪ [1‑5]: The current Te target parameter position.
▪ [1‑6]: The current Tc target parameter position.
Refer to "7.3 Energy saving and optimum operation" on page 45 for
more details about the contents of this value.
[1‑10]
Shows the total number of connected VRV and AHU indoor units.
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
recommended to check the communication wiring path between
outdoor and indoor units (F1/F2 communication line).
[1‑13]
Shows the total number of connected outdoor units (in case of
multiple outdoor system).
0
Outdoor unit is master unit.
1
Outdoor unit is slave 1 unit.
It can be convenient to check if the total number of outdoor units
which are installed matches the total number of outdoor units which
are recognised by the system. In case there is a mismatch, it is
recommended to check the communication wiring path between
outdoor and outdoor units (Q1/Q2 communication line).
2
Outdoor unit is slave 2 unit.
[1‑17] [1‑18] [1‑19]
[1‑0]
No indication
Description
Undefined situation.
[1‑1]
Shows:
Shows the status of low noise operation.
▪ [1‑17]: The latest malfunction code.
▪ [1‑18]: The 2nd last malfunction code.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
41
7 Configuration
▪ [1‑19]: The 3rd last malfunction code.
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
"10.2 Solving problems based on error codes" on page 51, where
most relevant malfunction codes are explained. Detailed information
about malfunction codes can be consulted in the service manual of
this unit.
[1‑29] [1‑30] [1‑31]
[2‑9]
Tc target (°C)
2
42
3
43
4
44
5
45
6
46
For more information and advice about the impact of these settings,
see "7.3 Energy saving and optimum operation" on page 45.
[2‑12]
Show the result of the leak detection function:
▪
: No data.
▪
: Leak detection failure due to abnormal operation.
▪
: No leak detected.
▪
: Leak detected.
For instructions on how to use the leak detection function, see
"7.4 Using the leak detection function" on page 47.
[1‑34]
Enable the low noise function and/or power consumption limitation
via external control adaptor (DTA104A61/62).
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.
[2‑12]
0 (default)
Shows the remaining days till the next automatic leak detection (if
automatic leak detection function is activated).
When the automatic leak detection function was activated through
mode 2 settings, it is possible to see within how many days, the
automatic leak detection will be performed. Depending on the field
setting chosen, the automatic leak detection function can be
programmed one time into the future or on perpetual basis.
1
Deactivated.
Activated.
[2‑14]
Input additional refrigerant amount that was charged.
In case you want to use the automatic leak detection functionality, it
is required to input the total additional refrigerant charge amount.
[2‑14]
Additional amount charged (kg)
0 (default)
No input
Indication is given in remaining days and is between 0 and 365 days.
[1‑39]
Description
1
0<x<5
2
5<x<10
3
10<x<15
4
15<x<20
5
20<x<25
6
25<x<30
▪ [1‑40]: The current cooling comfort setting.
7
30<x<35
▪ [1‑41]: The current heating comfort setting.
8
35<x<40
See "7.3 Energy saving and optimum operation" on page 45 for
more details about this setting.
9
40<x<45
10
45<x<50
11
50<x<55
12
55<x<60
[2‑8]
13
60<x<65
Te target temperature during cooling operation.
14
65<x<70
Te target (°C)
15
70<x<75
0 (default)
Auto
16
75<x<80
2
6
17
80<x<85
3
7
18
85<x<90
4
8
19
5
9
20
Setting cannot be used. Total refrigerant
charge has to be <100 kg.
6
10
21
7
11
Shows:
▪ The number of Hydrobox (HXY080/125 and HXHD) indoor units
connected to the system.
[1‑40] [1‑41]
Shows:
7.2.8
Mode 2: Field settings
[2‑8]
For more information and advice about the impact of these settings,
see "7.3 Energy saving and optimum operation" on page 45.
[2‑9]
Tc target temperature during heating operation.
[2‑9]
Tc target (°C)
0 (default)
Auto
1
41
▪ For details concerning the charging procedure, see "6.7.2 About
charging refrigerant" on page 29.
▪ For details concerning the calculation of additional refrigerant
charge amount, see "6.7.3 To determine the additional refrigerant
amount" on page 29.
▪ For guidance concerning the input of the additional refrigerant
charge amount and leak detection function see "7.4 Using the leak
detection function" on page 47.
[2‑18]
Fan high static pressure setting.
Installer and user reference guide
42
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
7 Configuration
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.
[2‑18]
0 (default)
1
[2‑25]
Description
1
Level 1
2 (default)
Level 2
3
Level 3
Description
Level 3<Level 2<Level 1
Deactivated.
[2‑26]
Activated.
Low noise operation start time.
[2‑20]
This setting is used in conjunction with setting [2‑22].
Manual additional refrigerant charge.
In order to add the additional refrigerant charge amount in a manual
way (without automatic refrigerant charging functionality), following
setting should be applied. Further instructions regarding the different
ways to charge additional refrigerant into your system can be found
in chapter "6.7.2 About charging refrigerant" on page 29.
[2‑20]
0 (default)
1
Description
Deactivated.
1
20h00
2 (default)
22h00
3
24h00
[2‑27]
This setting is used in conjunction with setting [2‑22].
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.
[2‑21]
Refrigerant recovery/vacuuming mode.
In order to achieve a free 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.
0 (default)
Start time automatic low noise operation
(approximately)
Low noise operation stop time.
Activated.
[2‑21]
[2‑26]
[2‑27]
Stop time automatic low noise operation
(approximately)
1
6h00
2
7h00
3 (default)
8h00
[2‑30]
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.
[2‑30]
Power consumption limitation
(approximately)
1
60%
Description
Deactivated.
2
65%
3 (default)
70%
4
75%
5
80%
6
85%
[2‑22]
7
90%
Automatic low noise setting and level during night time.
8
95%
1
Activated.
To stop the refrigerant recovery/vacuuming
mode, push BS3. If BS3 is not pushed, the
system will remain in refrigerant recovery/
vacuuming mode.
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].
[2‑22]
0 (default)
Description
Deactivated
1
Level 1
2
Level 2
3
Level 3
[2‑31]
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.
Level 3<Level 2<Level 1
[2‑31]
Power consumption limitation
(approximately)
1 (default)
40%
[2‑25]
2
50%
Low noise operation level via the external control adaptor.
3
55%
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.
[2‑32]
Forced, all time, power consumption limitation operation (no external
control adaptor is required to perform power consumption limitation).
This setting will only be effective when the optional external control
adaptor (DTA104A61/62) is installed and the setting [2‑12] was
activated.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
43
7 Configuration
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.
[2‑32]
Restriction reference
This setting is used in conjunction with setting [2‑8].
[2‑81]
Cooling comfort setting
0
Eco
1 (default)
Mild
Function not active.
2
Quick
1
Follows [2‑30] setting.
3
Powerful
2
Follows [2‑31] setting.
0 (default)
For more information and advice about the impact of these settings,
see "7.3 Energy saving and optimum operation" on page 45.
[2‑35]
[2‑82]
Height difference setting.
Heating comfort setting.
[2‑35]
0
1 (default)
Description
In case the outdoor unit is installed in the
lowest position (indoor units are installed on a
higher position than outdoor units) and the
height difference between the highest indoor
unit and the outdoor unit exceeds 40 m, the
setting [2‑35] should be changed to 0.
This setting is used in conjunction with setting [2‑9].
[2‑82]
Heating comfort setting
0
Eco
1 (default)
Mild
—
2
Quick
3
Powerful
Other changes/limitations to the circuit apply. For more information
see "5.3.6 Single outdoor units and standard multi-outdoor-unit
combinations >20 HP" on page 17 and "5.3.7 Standard multioutdoor-unit combinations ≤20 HP and free multi-outdoor-unit
combinations" on page 18.
For more information and advice about the impact of these settings,
see "7.3 Energy saving and optimum operation" on page 45.
[2‑45]
This setting is used in conjunction with setting [2‑86].
[2‑85]
Automatic leak detection interval time.
Technical cooling.
[2‑85]
Time between automatic leak detection
executions (days)
0 (default)
365
1
180
2
90
For more information about this setting, refer to the service manual.
3
60
[2‑47]
4
30
Te target temperature during heat recovery operation.
5
7
6
1
[2‑45]
0 (default)
1
Description
No technical cooling available
Technical cooling available
[2‑47]
Te target (°C)
0 (default)
Auto
2
6
Automatic leak detection activation.
3
7
4
8
When you want to use the automatic leak detection function you
have to activate this setting. By activating setting [2‑86], the
automatic leak detection will be executed depending on the defined
value setting. The timing for the next automatic refrigerant leak
detection is subject to setting [2‑85]. The automatic leak detection
will be executed in [2‑85] days.
5
9
6
10
7
11
Each time when the automatic leak detection function was executed
the system will stay idle until it is restarted by manual thermo ON
request or by next scheduled action.
[2‑49]
Height difference setting.
[2‑49]
0 (default)
1
[2‑86]
Description
—
In case the outdoor unit is installed in the
highest position (indoor units are installed on a
lower position than outdoor units) and the
height difference between the lowest indoor
unit and the outdoor unit exceeds 50 m, the
setting [2‑49] has to be changed to 1.
[2‑86]
0 (default)
Description
No leak detection planned.
1
Leak detection planned once in [2‑85] days.
2
Leak detection planned every [2‑85] days.
Other changes/limitations to the circuit apply. For more information
see "5.3.6 Single outdoor units and standard multi-outdoor-unit
combinations >20 HP" on page 17 and "5.3.7 Standard multioutdoor-unit combinations ≤20 HP and free multi-outdoor-unit
combinations" on page 18.
[2‑81]
Cooling comfort setting.
Installer and user reference guide
44
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
7 Configuration
7.2.9
To connect the PC configurator to the
outdoor unit
idea, the system automatically starts decreasing its refrigerant
temperature, automatically reducing the delivered capacity and
increasing the system's efficiency.
Change…
H JST
To activate this in…
2
3
4
5
a
c
b
A1P
7A
X2
7.3
[2‑8]=0 (default)
Heating operation
[2‑9]=0 (default)
Hi-sensible/economic (cooling/heating)
X27A
a
b
c
Cooling operation
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.
PC
Cable (EKPCCAB)
Outdoor unit main PCB
Change…
To activate this in…
Energy saving and optimum
operation
This VRV IV heat recovery 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.
Cooling operation
[2‑8] to the appropriate value,
matching the requirements of the
pre-designed system containing
a high sensible solution.
Heating operation
[2‑9] to the appropriate value,
matching the requirements of the
pre-designed system containing
a high sensible solution.
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.
[2‑8]
Te target (°C)
3
7
4
8
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.
5
9
6
10
7
11
[2‑9]
Tc target (°C)
1
41
3
43
Care should be taken about selection procedures and system
setups, especially when using Hydrobox units. The requested
leaving water temperature from the Hydrobox has priority over this
energy saving control, as it is related to the required water
temperature.
7.3.1
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.
To activate this in…
Change…
Cooling operation
[2‑8]=2
Heating operation
[2‑9]=6
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
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
7.3.2
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.
▪ In case of heating operation the condense temperature is allowed
to go up to 49°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…
[2‑81]=3.
This setting is used in
conjunction with setting [2‑8].
Installer and user reference guide
45
7 Configuration
To activate this in…
Heating operation
To activate this in…
Change…
Heating operation
[2‑82]=3.
This setting is used in
conjunction with setting [2‑9].
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.
Change…
[2‑82]=0.
7.3.3
Example: Automatic mode during cooling
E
100%
▪ 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.
A
▪ 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…
50%
B
Te
[2‑81]=2.
This setting is used in
conjunction with setting [2‑8].
Heating operation
[2‑82]=2.
C
This setting is used in
conjunction with setting [2‑9].
D
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.
6°C
3°C
35°C
▪ In case of heating operation the condense temperature is allowed
to go up to 46°C on temporary base depending on the situation.
A
B
C
▪ 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.
D
E
F
Te
▪ The start up condition is different from the powerful and quick
comfort setting.
To activate this in…
Cooling operation
Change…
[2‑81]=1.
F
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
Room temperature evolution:
This setting is used in
conjunction with setting [2‑8].
Heating operation
[2‑82]=1.
This setting is used in
conjunction with setting [2‑9].
D
Eco
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…
F
A
[2‑81]=0.
This setting is used in
conjunction with setting [2‑8].
B
C
A
B
C
D
Installer and user reference guide
46
E
Indoor unit set temperature
Operation start
Operating time
Mild
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
7 Configuration
E
F
7.3.4
Quick
Powerful
Example: Automatic mode during heating
E
7.4
Using the leak detection function
7.4.1
About automatic leak detection
100%
The (automatic) leak detection function is not by default activated
and can only start working when the additional refrigerant charge is
inputted into the system's logic (see [2‑14]).
70%
The leak detection operation can be automated. By changing
parameter [2‑85] to chosen value, the interval time or the time till the
next automatic leak detection operation can be chosen. The
parameter [2‑86] defines whether the leak detection operation is
executed one time (within [2‑85] days) or intermittent, respecting an
interval of [2‑85] days.
A
B
Availability of the leak detection function feature requires input of the
additional refrigerant charge amount immediately after finishing the
charging. The input must be executed before performing the test
operation.
Tc
INFORMATION
▪ The weighed and already recorded amount of
additional refrigerant charge (not the total amount of
refrigerant present in the system) must be entered.
49°C
C
46°C
▪ The leak detection function is not available when
Hydrobox units are connected to the system.
▪ When the height difference between indoor units is
≥50/40 m, the leak detection function can not be used.
7.4.2
To manually perform a leak detection
When the leak detection function was initially not required, but its
activation is wanted at a later moment, input the additional
refrigerant charge into the system's logic.
Executing the leak detection function one time at site can also be
done by following procedure.
D
2°C
A
B
C
D
E
F
Tc
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
1
Push BS2 one time.
2
Push BS2 one more time.
3
Push BS2 5 seconds.
4
Leak detection function will start. To abort leak detection
operation, push BS1.
Result: When the manual leak detection is finished, the result is
shown on the outdoor unit 7‑segment display. The indoor units are in
locked state (centralised control symbol). To return to normal state,
push BS1.
Display
Meaning
No leak detected
Room temperature evolution:
Leak detected
Information codes:
A
Code
F
Description
Unit is not prepared to execute leak detection
operation (refer to requirements to be able to
execute leak detection operation).
E
D
Indoor unit is out of temperature range for leak
detection operation.
Outdoor unit is out of temperature range for
leak detection operation.
B
C
A
B
C
D
E
F
Indoor unit set temperature
Operation start
Operating time
Mild
Quick
Powerful
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Too low pressure was noticed during leak
detection operation. Restart leak detection
operation.
Indicates an indoor unit which is not compatible
with leak detection functionality is installed
(e.g. Hydrobox units, …).
Result of leak detection operation is informed in [1‑35] and [1‑29].
Installer and user reference guide
47
8 Commissioning
Steps during leak detection:
NOTICE
Display
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.
Steps
Preparation
(a)
Pressure equalisation
Start up
Leak detection operation
Standby(b)
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.
Leak detection operation is finished
(a)
(b)
8
8.1
If the indoor temperature is too low, first the heating
operation will start.
If the indoor temperature is lower than 15°C due to leak
detection operation and the outdoor temperature is lower
than 20°C, the heating operation will start to maintain basic
comfort heating level.
Commissioning
Overview: Commissioning
8.3
Checklist before commissioning
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit must be closed, only then can
the unit be powered up.
You read the complete installation 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.
Field wiring
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.
This chapter describes what you have to do and know to
commission the system after it is configured.
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 35,
according to the wiring diagrams and according to the
applicable legislation.
Commissioning typically consists of the following stages:
Power supply voltage
1
2
Checking the "Checklist before commissioning".
Performing a test run.
3
If necessary, correcting errors after abnormal completion of the
test run.
Check the power supply voltage on the local supply panel.
The voltage must correspond to the voltage on the
identification label of the unit.
4
Operating the system.
8.2
Precautions when commissioning
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
Earth wiring
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
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
CAUTION
Do not perform the test operation while working on the
indoor units.
When performing the test operation, not only the outdoor
unit, but the connected indoor unit will operate as well.
Working on an indoor unit while performing a test operation
is dangerous.
CAUTION
Do not insert fingers, rods or other objects into the air inlet
or outlet. Do not remove the fan guard. When the fan is
rotating at high speed, it will cause injury.
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.
NOTICE
Stop valves
Test run is possible for ambient temperatures between
–⁠20°C and 35°C.
Be sure that the stop valves are open on both liquid and
gas side.
INFORMATION
Damaged equipment
Note that during the first running period of the unit,
required power input may be higher. This phenomenon
originates from the compressor that requires a 50 hour run
elapse before reaching smooth operation and stable power
consumption. Reason is that the scroll is made out of iron
and that it takes some time to smooth the surfaces that
make contact.
Check the inside of the unit on damaged components or
squeezed pipes.
Installer and user reference guide
48
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 21. Be sure that neither a fuse nor
a protection device has been bypassed.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
8 Commissioning
Refrigerant leak
NOTICE
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.
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.
4
Make sure the default (idle) situation is existing; see "7.2.4 To
access mode 1 or 2" on page 40. Push BS2 for 5 seconds or
more. The unit will start test operation.
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.
Result: The test operation is automatically carried out, the
outdoor unit display will indicate "
" and the indication "Test
operation" and "Under centralised control" will display on the
user interface of indoor units.
Air inlet/outlet
Check that the air inlet and outlet of the unit is not
obstructed by paper sheets, cardboard, or any other
material.
Steps during the automatic system test run procedure:
Step
Additional refrigerant charge
Cooling start up control
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.
8.4
Description
Control before start up (pressure equalisation)
Cooling stable condition
Communication check
Installation date and field setting
Stop valve check
Be sure to keep record of the installation date on the
sticker on the rear of the upper front panel according to
EN60335‑2‑40 and keep record of the contents of the field
setting(s).
Pipe length check
About test run
The procedure below describes the test operation of the complete
system. This operation checks and judges following items:
Refrigerant amount check
Pump down operation
Unit stop
Note: 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.
5
Check the test operation results on the outdoor unit 7‑segment
display.
▪ Check of wrong wiring (communication check with indoor units).
▪ Check of the stop valves opening.
Completion
Description
▪ Judgement of piping length.
Normal completion No indication on the 7‑segment display (idle).
In case Hydrobox units are present in the system, the pipe length
check and the refrigerant situation check will not be performed.
Abnormal
completion
Refer to "8.6 Correcting after abnormal
completion of the test run" on page 49 to take
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
▪ 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 (e.g., Hydrobox) concerning the individual test run.
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.
8.5
1
To perform a test run
Close all front panels in order to not let it be the cause of
misjudgement (except the electrical component box inspection
opening service cover).
2
Make sure all field settings you want are set; see "7.2 Making
field settings" on page 39.
3
Turn ON the power to the outdoor unit and the connected
indoor units.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Indication of malfunction code on the
7‑segment display.
8.6
Correcting after abnormal
completion of the test run
The test operation is only completed if there is no malfunction code
displayed on the user interface or outdoor unit 7‑segment display. 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
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
8.7
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.
Installer and user reference guide
49
9 Maintenance and service
9
5
Maintenance and service
NOTICE
After the service is finished, plug the junction connector back in.
Otherwise the malfunction code
will be displayed on the
user interface or on the outdoor unit 7‑segment display and
normal operation will not be performed.
Maintenance must be done by an authorised installer or
service agent.
For details refer to the wiring diagram labelled on the back of the
electrical component box cover.
We recommend to do maintenance at least once a year.
However, applicable legislation might require shorter
maintenance intervals.
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.
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
Overview: Maintenance and
service
9.1
9.3
Refrigerant recovery operation/vacuuming operation is possible by
applying setting [2‑21]. Refer to "7.2 Making field settings" on
page 39 for details how to set mode 2.
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.
9.3.1
1
This chapter contains information about:
▪ The refrigerant recovery operation
Maintenance safety precautions
To use vacuum mode
When the unit is at standstill, set the unit in [2‑21]=1.
Result: When confirmed, the indoor and outdoor unit expansion
valves will fully open. At that moment the 7‑segment display
and the user interface of all indoor units
indication=
indicate TEST (test operation) and
(external control) and
the operation will be prohibited.
▪ Preventing electrical hazards when maintaining and servicing the
system
9.2
About service mode operation
2
Evacuate the system with a vacuum pump.
3
Press BS3 to stop vacuuming mode.
DANGER: RISK OF ELECTROCUTION
9.3.2
DANGER: RISK OF BURNING
To recover refrigerant
This should be done by a refrigerant reclaimer. Follow the same
procedure as for vacuuming method.
NOTICE: Risk of electrostatic discharge
DANGER: RISK OF EXPLOSION
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
9.2.1
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leakage in the refrigerant
circuit:
To prevent electrical hazards
▪ 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.
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.
5~12 HP
14~20 HP
▪ 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.
RED
BLK
X6A (A6P)
X5A (A3P)
10
Troubleshooting
10.1
Overview: Troubleshooting
X3A
This chapter describes what you have to do in case of problems.
3
4
To prevent damaging the PCB, touch a non-coated metal part
to eliminate static electricity before pulling out or plugging in
connectors.
▪ Solving problems based on error codes
Pull out junction connectors X1A, X2A (X3A, X4A) 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.)
Installer and user reference guide
50
It contains information about:
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
10 Troubleshooting
10.2
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.
The malfunction code which is displayed on the outdoor unit will
indicate a main malfunction code and a sub code. The sub code
indicates more detailed information about the malfunction code. The
malfunction code will be displayed intermittent.
10.3
Example:
Code
Example
Main code
Sub code
With an interval of 1 second, the display will switch between main
code and sub code.
Error codes: Overview
Main code
Sub code
Master
Slave 1
Cause
Solution
Slave 2
High pressure switch was activated
(S1PH, S2PH) – main PCB (X2A,
X3A)
Check stop valve situation or
abnormalities in (field) piping or airflow
over air cooled coil.
▪ Refrigerant overcharge
▪ Check refrigerant amount+recharge
unit.
▪ Stop valve closed
▪ Open stop valves
Stop valve closed (liquid)
Open liquid stop valve.
▪ Refrigerant overcharge
▪ Check refrigerant amount+recharge
unit.
▪ Stop valve closed
▪ Open stop valves.
Low pressure malfunction:
▪ Open stop valves.
▪ Stop valve closed
▪ Check refrigerant amount+recharge
unit.
▪ Refrigerant shortage
▪ Indoor unit malfunction
▪ Check the user interface's display or
transmission wiring between the
outdoor unit and the indoor unit.
Electronic expansion valve malfunction Check connection on PCB or actuator.
(upper heat exchanger) (Y1E) – main
PCB (X21A)
Electronic expansion valve malfunction Check connection on PCB or actuator.
(lower heat exchanger) (Y3E) – main
PCB (X23A)
Electronic expansion valve malfunction Check connection on PCB or actuator
(subcool heat exchanger) (Y2E) –
main PCB (X22A)
Electronic expansion valve malfunction Check connection on PCB or actuator.
(receiver gas) (Y4E) – main PCB
(X25A)
Electronic expansion valve malfunction Check connection on PCB or actuator.
(inverter cooling) (Y5E) – sub PCB
(X8A)
Electronic expansion valve malfunction Check connection on PCB or actuator.
(auto charge) (Y6E) - sub PCB (X10A)
Discharge temperature too high
(R21T/R22T) – main PCB (X19A):
▪ Stop valve closed
▪ Open stop valves.
▪ Check refrigerant amount+recharge
unit.
▪ Refrigerant shortage
Compressor casing temperature too
high (R15T) – main PCB (X19A):
▪ Stop valve closed
▪ Open stop valves.
▪ Check refrigerant amount+recharge
unit.
▪ Refrigerant shortage
▪ Refrigerant overcharge
▪ Stop valve closed
▪ Check refrigerant amount+recharge
unit.
▪ Open stop valves.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
51
10 Troubleshooting
Main code
Sub code
Master
Slave 1
Cause
Solution
Slave 2
Ambient temperature sensor
Check connection on PCB or actuator.
malfunction (R1T) – main PCB (X18A)
Discharge temperature sensor
malfunction (R21T): open circuit –
main PCB (X19A)
Check connection on PCB or actuator.
Discharge temperature sensor
Check connection on PCB or actuator.
malfunction (R21T): short circuit - main
PCB (X19A)
Discharge temperature sensor
Check connection on PCB or actuator.
malfunction (R22T): open circuit - main
PCB (X19A)
Discharge temperature sensor
Check connection on PCB or actuator.
malfunction (R22T): short circuit - main
PCB (X19A)
Compressor casing temperature
Check connection on PCB or actuator.
sensor malfunction (R8T): open circuit
- main PCB (X19A)
Compressor casing temperature
Check connection on PCB or actuator.
sensor malfunction (R8T): short circuit
- main PCB (X19A)
Suction compressor temperature
sensor (R12T) – sub PCB (X15A)
Check connection on PCB or actuator.
Suction temperature sensor (R10T) –
main PCB (X29A)
Check connection on PCB or actuator.
Heat exchanger deicer temperature
sensor (R11T) – sub PCB (X15A)
Check connection on PCB or actuator
Upper heat exchanger – gas Check connection on PCB or actuator.
temperature sensor (R8T) – main PCB
(X29A)
Lower heat exchanger – gas temperature sensor (R9T) main PCB
(X29A)
Check connection on PCB or actuator.
Liquid main - temperature sensor
(R3T) – main PCB (X30A)
Check connection on PCB or actuator.
Subcool heat exchanger – liquid Check connection on PCB or actuator.
temperature sensor (R7T) - main PCB
(X30A)
Upper heat exchanger – liquid Check connection on PCB or actuator.
temperature sensor (R4T ) - main PCB
(X30A)
Lower heat exchanger – liquid Check connection on PCB or actuator.
temperature sensor (R5T ) - main PCB
(X30A)
Auto charge temperature sensor
(R14T ) – sub PCB (X15A)
Check connection on PCB or actuator.
Subcool heat exchanger – gas Check connection on PCB or actuator.
temperature sensor (R6T) – main PCB
(X30A)
Installer and user reference guide
52
Receiver gas temperature sensor
(R13T) – sub PCB (X17A)
Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): open circuit - main PCB
(X32A)
Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): short circuit - main PCB
(X32A)
Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): open circuit - main PCB
(X31A)
Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): short circuit - main PCB
(X31A)
Check connection on PCB or actuator.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
10 Troubleshooting
Main code
Sub code
Master
Slave 1
Cause
Solution
Slave 2
Transmission outdoor unit - inverter:
Check connection.
INV1 transmission trouble - main PCB
(X20A, X28A, X40A)
Transmission outdoor unit - inverter:
Check connection.
FAN1 transmission trouble - main PCB
(X20A, X28A, X40A)
Transmission outdoor unit - inverter:
Check connection.
FAN2 transmission trouble - main PCB
(X20A, X28A, X40A)
Transmission outdoor unit - inverter:
Check connection.
INV2 transmission trouble - main PCB
(X20A, X28A, X40A)
Transmission main PCB – sub PCB –
main PCB (X20A), sub PCB (X2A,
X3A)
Check connection.
INV1 unbalanced power supply
voltage
Check if power supply is within range.
INV2 unbalanced power supply
voltage
Check if power supply is within range.
Reversed power supply phase
malfunction
Correct phase order.
Reversed power supply phase
malfunction
Correct phase order.
INV1 voltage power shortage
Check if power supply is within range.
INV1 power phase loss
Check if power supply is within range.
INV2 voltage power shortage
Check if power supply is within range
INV2 power phase loss
Check if power supply is within range.
Malfunction code: system test run not
yet executed (system operation not
possible)
Execute system test run.
An error occurred during the test run
Re-execute the test run.
,
Test run aborted
Re-execute the test run.
,
Test run aborted due to
communication issues
Check the communication wires and
re-execute the test run.
Faulty wiring to Q1/Q2 or indoor outdoor
Check (Q1/Q2) wiring.
Indoor unit communication error
Check user interface connection.
Malfunction code: faulty wiring to Q1/
Q2
Check Q1/Q2wiring.
Too many indoor units are connected
to F1/F2 line
Check indoor unit amount and total
capacity connected.
System mismatch. Wrong type of
indoor units combined (R410A,
R407C, Hydrobox, etc)
Check if other indoor units have
malfunction and confirm indoor unit
mix is allowed.
,
Indoor unit malfunction
Connection malfunction over indoor
units or type mismatch (R410A,
R407C, Hydrobox, etc)
Check if other indoor units have
malfunction and confirm indoor unit
mix is allowed.
Connection malfunction over indoor
units or type mismatch (R410A,
R407C, Hydrobox, etc)
Check if other indoor units have
malfunction and confirm indoor unit
mix is allowed.
Wrong unit combination (multi system) Check if unit types are compatible.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Wrong outdoor unit connected
Disconnect the outdoor unit.
No BS unit connected
Connect a BS unit.
Old BS unit connected
Disconnect the BS unit.
BS unit DIP switch abnormality
Check the DIP switches of the BS unit.
Auto address malfunction
(inconsistency)
Check if transmission wired unit
amount matches with powered unit
amount (by monitor mode) or wait till
initialisation is finished.
Installer and user reference guide
53
11 Disposal
Main code
Sub code
Master
Slave 1
Cause
Solution
Slave 2
Auto address malfunction
(inconsistency)
Check if transmission wired unit
amount matches with powered unit
amount (by monitor mode) or wait till
initialisation is finished.
Stop valve closed or wrong (during
system test run)
Open stop valves.
Unusual low pressure on suction line
Close valve A immediately. Push BS1
to reset. Check following items before
retrying autocharge procedure:
Auto charging related
—
▪ Check if the gas side stop valve is
opened correctly.
▪ Check if the valve of the refrigerant
cylinder is opened.
▪ Check if the air inlet and outlet of the
indoor unit are not obstructed.
—
Freeze-up prevention indoor unit
Close valve A immediately. Push BS1
to reset. Retry autocharge procedure.
—
Automatic charging nearly finished
Prepare for autocharge stopping.
—
Automatic charging finished
Finish autocharge mode.
—
Unit is not prepared to execute leak
detection operation
Refer to requirements to be able to
execute leak detection operation.
—
Indoor unit is out of temperature range Retry when ambient conditions are
for leak detection operation
satisfied.
—
Outdoor unit is out of temperature
range for leak detection operation
Retry when ambient conditions are
satisfied.
—
Too low pressure was noticed during
leak detection operation
Restart leak detection operation.
—
Indicates an indoor unit which is not
compatible with leak detection
functionality is installed (e.g.
Hydrobox, …)
Refer to requirements to be able to
execute leak detection operation.
Leak detection function related
11
Disposal
Dismantling of the unit, and treatment of the refrigerant, oil and other
parts must comply with the applicable legislation.
Installer and user reference guide
54
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
12
Technical data
A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of latest technical data is
available on the Daikin extranet (authentication required).
12.1
Overview: Technical data
This chapter contains information about:
▪ Dimensions
▪ Service space
▪ Components
▪ Piping diagram
▪ Wiring diagram
▪ Technical specifications
▪ Capacity table
12.2
Dimensions: Outdoor unit
766
729
5~12 HP
76
765
76
137
276
259
179
131
122
515
1685
4-15x22.5
97
(mm)
107
272
328
373
930
1076
729
14~20 HP
76
765
76
137
276
259
179
131 122
515
1685
4-15x22.5
97
(mm)
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
107
272
328
373
1240
Installer and user reference guide
55
12 Technical data
Service space: Outdoor unit
b
b
c
aa
e
aa
d
c
e
b
b
c
c
e
f
aa
d
b
Sides along the installation site with obstacles
Sides along the installation site with obstacles
Suction side
▪ In case of an installation site where sides A+B+C+D have
obstacles, the wall heights of sides A+C have no impact on
service space dimensions. Refer to the figure above for impact of
wall heights of sides B+D on service space dimensions.
▪ The installation space required on these drawings are for full load
heating operation without considering possible ice accumulation. If
the location of the installation is in a cold climate, then all
dimensions above should be >500 mm to avoid accumulation of
ice in between the outdoor units.
b
e
(mm)
▪ In case of an installation site where only the sides A+B have
obstacles, the wall heights have no influence on any indicated
service space dimensions.
d
aa
h1
F
ABCD
F
d
e
h2
500
Make sure the space around the unit is adequate for servicing and
the minimum space for air inlet and air outlet is available (refer to the
figure below and choose one of the possibilities).
1500
12.3
c
INFORMATION
f
The service space dimensions in above figure are based
on cooling operation at 35°C ambient temperature
(standard conditions).
aa
d
INFORMATION
Possibility 1
1
2
3
4
5
Possibility 2
a≥10 mm
a≥50 mm
a≥200 mm
b≥300 mm
b≥100 mm
b≥300 mm
c≥10 mm
c≥50 mm
d≥500 mm
d≥500 mm
a≥10 mm
a≥50 mm
a≥200 mm
b≥300 mm
b≥100 mm
b≥300 mm
c≥10 mm
c≥50 mm
d≥500 mm
d≥500 mm
e≥20 mm
e≥100 mm
e≥400 mm
a≥10 mm
a≥50 mm
—
b≥300 mm
b≥100 mm
c≥10 mm
c≥50 mm
d≥500 mm
d≥500 mm
e≥20 mm
e≥100 mm
f≥600 mm
f≥500 mm
a≥10 mm
a≥50 mm
b≥300 mm
b≥100 mm
c≥10 mm
c≥50 mm
d≥500 mm
d≥500 mm
e≥20 mm
e≥100 mm
a≥10 mm
a≥50 mm
b≥500 mm
b≥500 mm
c≥10 mm
c≥50 mm
d≥500 mm
d≥500 mm
e≥20 mm
e≥100 mm
f≥900 mm
f≥600 mm
Installer and user reference guide
56
A+B
A+B+C+D
Layout
Further specifications can be found in the technical
engineering data.
—
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
12.4
Components: Outdoor unit
Components: 5~12 HP
c
c
d
d
x
l
g
i
u
t
s
y
r q
b
k j h w v
a
e
f
n
o
m
p
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
Compressor (M1C)
Heat exchanger
Propeller fan
Fan motor (M1F)
Accumulator
Oil separator
Electronic expansion valve (upper heat exchanger)
Electronic expansion valve (subcool heat exchanger)
Electronic expansion valve (lower heat exchanger)
Electronic expansion valve (receiver gas)
Electronic expansion valve (inverter cooling)
Electronic expansion valve (auto charge)
4‑way valve (high pressure/low pressure gas pipe)
4‑way valve (lower heat exchanger)
4‑way valve (upper heat exchanger)
Electrical component box
Service port
Charge port
Stop valve (gas)
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
t
u
v
w
x
y
Stop valve (high pressure/low pressure gas)
Stop valve (liquid)
Solenoid valve (M1C oil return)
Solenoid valve (liquid pipe)
Heat sink
Liquid receiver
Installer and user reference guide
57
12 Technical data
Components: Outdoor unit 14~20 HP
c
d
x
c
d
l
g
i
u
y
s
o k jh
b
f
t r q
a
a
e
f
w
n
p
m
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
Installer and user reference guide
58
v
Compressor (M1C)
Heat exchanger
Propeller fan
Fan motor (M1F)
Accumulator
Oil separator
Electronic expansion valve (upper heat exchanger)
Electronic expansion valve (subcool heat exchanger)
Electronic expansion valve (lower heat exchanger)
Electronic expansion valve (receiver gas)
Electronic expansion valve (inverter cooling)
Electronic expansion valve (auto charge)
4‑way valve (high pressure/low pressure gas pipe)
4‑way valve (lower heat exchanger)
4‑way valve (upper heat exchanger)
Electrical component box
Service port
Charge port
Stop valve (gas)
Stop valve (high pressure/low pressure gas)
Stop valve (liquid)
v
v
w
x
y
Solenoid valve (M1C oil return)
Solenoid valve (liquid pipe)
Heat sink
Liquid receiver
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
12.5
Components: Electrical component box
5~12 HP
a
c
b
d
14~20 HP
d
b c a
a
b
c
d
Main PCB.
Terminal block X1M: main terminal block which allows easy
connection of field wiring for power supply.
Terminal X1M on main PCB: terminal block for
transmission wiring.
Cable tie mountings: the cable tie mountings allow to fix the
field wiring with cable ties to the electrical component box
to ensure strain relief.
INFORMATION
For more details refer to the wiring diagram of the units.
The wiring diagram is located on the inside of the electrical
component box.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
59
12 Technical data
12.6
Piping diagram: Outdoor unit
Piping diagram: 5~12 HP
Liquid
Service port
High pressure /
low pressure
Gas
Charge port
3D088100 page 1
Installer and user reference guide
60
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
Piping diagram: 14~20 HP
Liquid
Service port
High pressure /
low pressure
Gas
3D088099 page 1
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
61
12 Technical data
Charge port / Service port
Stop valve
Filter
Check valve
Pressure relief valve
Thermistor
Solenoid valve
Heat sink (PCB)
Capillary tube
Expansion valve
4‑way valve
Propeller fan
High pressure switch
Low pressure sensor
High pressure sensor
Oil separator
Accumulator
Heat exchanger
Compressor
Double tube heat exchanger
Distributor
Liquid receiver
Installer and user reference guide
62
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
12.7
Wiring diagram: Outdoor unit
Refer to the wiring diagram sticker on the unit. The abbreviations
used are listed below.
INFORMATION
The wiring diagram on the outdoor unit is only for the
outdoor unit. For the indoor unit or optional electrical
components, refer to the wiring diagram of the indoor unit.
5+8 HP
(NOTE6)
(NOTE3)
(NOTE3)
(NOTE3)
Indoor Outdoor Outdoor
layout
Switch box
Outer shell
Switch box
terminal
Front side
Rear side
2D087541-50A
A1P
Printed circuit board (main)
A4P
Printed circuit board (fan)
A2P
Printed circuit board (noise filter)
A5P
Printed circuit board (sub)
A3P
Printed circuit board (inverter)
BS1~BS3
Push-button switch (A1P) (mode, set, return)
REYQ8~20+REMQ5T7Y1B
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4P353997-1B – 2016.07
Installer and user reference guide
63
12 Technical data
C66, C32
Capacitor (A3P)
S1NPH
Pressure sensor (high)
DS1, DS2
DIP switch (A1P)
S1NPL
Pressure sensor (low)
E1HC
Crankcase heater
S1PH
Pressure switch (high)
F1U, F2U
Fuse (T, 3, 15 A, 250 V) (A1P)
SEG1~SEG3
7-segment display (A1P)
F1U
Fuse (T, 3, 15 A, 250 V) (A5P)
V1R
Power module (A3P) (A4P)
F101U
Fuse (A4P)
X1A, X2A
Connector (M1F)
F3U
Fuse (field-supplied)
X3A
Connector (residual charge check)
F410U~F412U
Fuse (A2P)
X10A
F400U
Fuse (A2P)
Connector (bottom plate heater – optional
accessory)
HAP
Pilot lamp (service monitor - green) (A1P)
(A5P)
X1M
Terminal block (power supply)
X1M
Terminal block (control) (A1P)
K1M
Magnetic contactor (A3P)
Y1E
K1R
Magnetic relay (A3P)
Electronic expansion valve (upper heat
exchanger)
K3R
Magnetic relay (A2P)
Y2E
K3R
Magnetic relay (Y11S) (A1P)
Electronic expansion valve (subcool heat
exchanger)
K6R
Magnetic relay (optional bottom plate heater)
(A1P)
Y3E
Electronic expansion valve (lower heat
exchanger)
K7R
Magnetic relay (E1HC) (A1P)
Y4E
Electronic expansion valve (receiver gas)
K9R
Magnetic relay (Y3S) (A1P)
Y5E
Electronic expansion valve (inverter cooling)
K11R
Magnetic relay (Y2S) (A1P)
Y6E
Electronic expansion valve (auto charge)
K12R
Magnetic relay (Y4S) (A1P)
Y11S
Solenoid valve (M1C oil return)
K13R
Magnetic relay (Y5S) (A1P)
Y2S
Solenoid valve (liquid pipe)
L1R
Reactor
Y3S
Solenoid valve (high pressure/low pressure
gas pipe)
M1C
Motor (compressor)
Y4S
Solenoid valve (lower heat exchanger)
M1F
Motor (fan)
Y5S
Solenoid valve (upper heat exchanger)
PS
Switching power supply (A1P) (A3P) (A5P)
Z1C~Z6C
Noise filter (ferrite core)
Q1DI
Earth leakage breaker (field-supplied)
Z1F
Noise filter (with surge absorber) (A2P)
Q1RP
Phase reversal detection circuit (A1P)
R1T
Thermistor (air) (A1P)
Note 1
R21T
Thermistor (M1C discharge) (A1P)
This wiring diagram only applies to the outdoor
unit.
R3T
Thermistor (liquid main) (A1P)
Note 2
▪
R4T
Thermistor (upper heat exchanger – liquid)
(A1P)
▪
: Connector
R5T
Thermistor (lower heat exchanger – liquid)
(A1P)
▪
: Terminal
R6T
Thermistor (subcool heat exchanger – gas)
(A1P)
▪
R7T
Thermistor (subcool heat exchanger – liquid)
(A1P)
R8T
Thermistor (upper heat exchanger – gas)
(A1P)
R9T
Thermistor (lower heat exchanger – gas) (A1P)
R10T
Thermistor (suction) (A1P)
R11T
Thermistor (heat exchanger deicer) (A5P)
R12T
Thermistor (suction compressor) (A5P)
R13T
Thermistor (receiver gas) (A5P)
▪ RED: Red
R14T
Thermistor (auto charge) (A5P)
▪ BLU: Blue
R78
Resistor (current limiting) (A3P)
▪ WHT: White
R24
Resistor (current sensor) (A4P)
▪ GRN: Green
R77
Resistor (current sensor) (A3P)
R3, R2
Resistor (A3P)
Installer and user reference guide
64
: Field wiring
▪
: Terminal block
: Protective earth (screw)
Note 3
For the connection of the wiring to outdoorindoor transmission terminals F1/F2, outdoorother systems transmission terminals F1/F2,
and master-slave transmission terminals Q1/
Q2, refer to the installation manual.
Note 4
When operating the unit, do not short-circuit
protection device S1PH.
Note 5
Colours:
▪ BLK: Black
Note 6
When using optional accessories, refer to their
respective installation manual.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
10+12 HP
(NOTE6)
(NOTE3)
(NOTE3)
(NOTE3)
Indoor Outdoor Outdoor
layout
Switch Box
Outer shell
Switch box
terminal
Front side
Rear side
A1P
Printed circuit board (main)
F101U
Fuse (A4P)
A2P
Printed circuit board (noise filter)
F3U
Fuse (field-supplied)
A3P
Printed circuit board (inverter)
F410U~F412U
Fuse (A2P)
A4P
Printed circuit board (fan)
F601U
Fuse (A3P)
A5P
Printed circuit board (sub)
HAP
BS1~BS3
Push-button switch (A1P) (mode, set, return)
Pilot lamp (service monitor - green) (A1P)
(A5P)
C47, C48
Capacitor (A3P)
K1M
Magnetic contactor (A3P)
DIP switch (A1P)
K1R
Magnetic relay (A3P)
E1HC
Crankcase heater
K3R
Magnetic relay (A3P)
F1U, F2U
Fuse (T, 3, 15 A, 250 V) (A1P)
K3R
Magnetic relay (Y11S) (A1P)
Fuse (T, 3, 15 A, 250 V) (A5P)
K6R
Magnetic relay (optional bottom plate heater)
(A1P)
DS1, DS2
F1U
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K7R
Magnetic relay (E1HC) (A1P)
K9R
Magnetic relay (Y3S) (A1P)
X10A
Connector (bottom plate heater – optional
accessory)
K11R
Magnetic relay (Y2S) (A1P)
X1M
Terminal block (power supply)
K12R
Magnetic relay (Y4S) (A1P)
X1M
Terminal block (control) (A1P)
K13R
Magnetic relay (Y5S) (A1P)
Y1E
L1R, L2R
Reactor
Electronic expansion valve (upper heat
exchanger)
M1C
Motor (compressor)
Y2E
Electronic expansion valve (subcool heat
exchanger)
M1F
Motor (fan)
Y3E
PS
Switching power supply (A1P) (A3P) (A5P)
Electronic expansion valve (lower heat
exchanger)
Q1DI
Earth leakage breaker (field-supplied)
Y4E
Electronic expansion valve (receiver gas)
Q1RP
Phase reversal detection circuit (A1P)
Y5E
Electronic expansion valve (inverter cooling)
R1T
Thermistor (air) (A1P)
Y6E
Electronic expansion valve (auto charge)
R21T
Thermistor (M1C discharge) (A1P)
Y11S
Solenoid valve (M1C oil return)
R3T
Thermistor (liquid main) (A1P)
Y2S
Solenoid valve (liquid pipe)
R4T
Thermistor (upper heat exchanger – liquid)
(A1P)
Y3S
Solenoid valve (high pressure/low pressure
gas pipe)
R5T
Thermistor (lower heat exchanger – liquid)
(A1P)
Y4S
Solenoid valve (lower heat exchanger)
Y5S
Solenoid valve (upper heat exchanger)
Thermistor (subcool heat exchanger – gas)
(A1P)
Z1C~Z6C
Noise filter (ferrite core)
Z1F
Noise filter (with surge absorber) (A2P)
R6T
R7T
Thermistor (subcool heat exchanger – liquid)
(A1P)
R8T
Thermistor (upper heat exchanger – gas)
(A1P)
Note 1
This wiring diagram only applies to the outdoor
unit.
R9T
Thermistor (lower heat exchanger – gas) (A1P)
Note 2
▪
: Field wiring
R10T
Thermistor (suction) (A1P)
▪
R11T
Thermistor (heat exchanger deicer) (A5P)
▪
: Connector
R12T
Thermistor (suction compressor) (A5P)
▪
: Terminal
R13T
Thermistor (receiver gas) (A5P)
R14T
Thermistor (auto charge) (A5P)
R15T
Thermistor (compressor body) (A1P)
R1
Resistor (current limiting) (A3P)
R24
Resistor (current sensor) (A4P)
R313
Resistor (current sensor) (A3P)
R865, R867
Resistor (A3P)
S1NPH
Pressure sensor (high)
S1NPL
Pressure sensor (low)
▪ BLK: Black
S1PH
Pressure switch (high)
▪ RED: Red
SEG1~SEG3
7-segment display (A1P)
▪ BLU: Blue
V1R
Power module (A3P) (A4P)
V2R
Power module (A3P)
X1A, X2A
Connector (M1F)
X3A
Connector (residual charge check)
Installer and user reference guide
66
▪
: Terminal block
: Protective earth (screw)
Note 3
For the connection of the wiring to outdoorindoor transmission terminals F1/F2, outdoorother systems transmission terminals F1/F2,
and master-slave transmission terminals Q1/
Q2, refer to the installation manual.
Note 4
When operating the unit, do not short-circuit
protection device S1PH.
Note 5
Colours:
▪ WHT: White
▪ GRN: Green
Note 6
When using optional accessories, refer to their
respective installation manual.
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4P353997-1B – 2016.07
12 Technical data
Switch box
Terminal of
Outer shell
(NOTE3)
(NOTE3)
(NOTE3)
(NOTE6)
Layout of
Switch box
indoor outdoor outdoor
14+16 HP
2D087542-50A
A1P
Printed circuit board (main)
F1U, F2U
Fuse (T, 3, 15 A, 250 V) (A1P)
A2P, A5P
Printed circuit board (noise filter)
F1U
Fuse (T, 3, 15 A, 250 V) (A8P)
A3P, A6P
Printed circuit board (inverter)
F3U
Fuse (field-supplied)
A4P, A7P
Printed circuit board (fan)
F101U
Fuse (A4P) (A7P)
A8P
Printed circuit board (sub)
F400U
Fuse (A2P) (A5P)
BS1~BS3
Push-button switch (A1P) (mode, set, return)
F410U~F412U
Fuse (A2P) (A5P)
C32, C66
Capacitor (A3P) (A6P)
HAP
DS1, DS2
DIP switch (A1P)
Pilot lamp (service monitor - green) (A1P)
(A8P)
E1HC, E2HC
Crankcase heater
K1M
Magnetic contactor (A3P) (A6P)
K1R
Magnetic relay (A3P) (A6P)
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K3R
Magnetic relay (A2P) (A5P)
X5A, X6A
Connector (residual charge check)
K3R
Magnetic relay (Y11S) (A1P)
X10A
K4R
Magnetic relay (Y12S) (A1P)
Connector (bottom plate heater – optional
accessory)
K6R
Magnetic relay (optional bottom plate heater)
(A1P)
X1M
Terminal block (power supply)
X1M
Terminal block (control) (A1P)
K7R
Magnetic relay (E1HC) (A1P)
Y1E
K8R
Magnetic relay (E2HC) (A1P)
Electronic expansion valve (upper heat
exchanger)
K9R
Magnetic relay (Y3S) (A1P)
Y2E
K11R
Magnetic relay (Y2S) (A1P)
Electronic expansion valve (subcool heat
exchanger)
K12R
Magnetic relay (Y4S) (A1P)
Y3E
Electronic expansion valve (lower heat
exchanger)
K13R
Magnetic relay (Y5S) (A1P)
Y4E
Electronic expansion valve (receiver gas)
L1R, L2R
Reactor
Y5E
Electronic expansion valve (inverter cooling)
M1C, M2C
Motor (compressor)
Y6E
Electronic expansion valve (auto charge)
M1F, M2F
Motor (fan)
Y11S
Solenoid valve (M1C oil return)
PS
Switching power supply (A1P) (A3P) (A6P)
(A8P)
Y12S
Solenoid valve (M2C oil return)
Q1DI
Earth leakage breaker (field-supplied)
Y2S
Solenoid valve (liquid pipe)
Q1RP
Phase reversal detection circuit (A1P)
Y3S
Solenoid valve (high pressure/low pressure
gas pipe)
R2, R3
Resistor (A3P) (A6P)
Y4S
Solenoid valve (lower heat exchanger)
R24
Resistor (current sensor) (A4P) (A7P)
Y5S
Solenoid valve (upper heat exchanger)
R77
Resistor (current sensor) (A3P) (A6P)
Z1C~Z7C
Noise filter (ferrite core)
R78
Resistor (current limiting) (A3P) (A6P)
Z1F
Noise filter (with surge absorber) (A2P) (A5P)
R1T
Thermistor (air) (A1P)
R21T, R22T
Thermistor (M1C, M2C discharge) (A1P)
R3T
Thermistor (liquid main) (A1P)
R4T
Thermistor (upper heat exchanger – liquid)
(A1P)
R5T
Thermistor (lower heat exchanger – liquid)
(A1P)
Note 1
This wiring diagram only applies to the outdoor
unit.
R6T
Thermistor (subcool heat exchanger – gas)
(A1P)
Note 2
▪
R7T
Thermistor (subcool heat exchanger – liquid)
(A1P)
R8T
Thermistor (upper heat exchanger – gas)
(A1P)
R9T
Thermistor (lower heat exchanger – gas) (A1P)
R10T
Thermistor (suction) (A1P)
R11T
Thermistor (heat exchanger deicer) (A8P)
R12T
Thermistor (suction compressor) (A8P)
R13T
Thermistor (receiver gas) (A8P)
R14T
Thermistor (auto charge) (A8P)
S1NPH
Pressure sensor (high)
S1NPL
Pressure sensor (low)
▪ BLK: Black
S1PH, S2PH
Pressure switch (high)
▪ RED: Red
SEG1~SEG3
7-segment display (A1P)
▪ BLU: Blue
V1R
Power module (A3P) (A6P)
▪ WHT: White
V1R
Power module (A4P) (A7P)
X1A~X4A
Connector (M1F, M2F)
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68
Connector colour
Wire colour
: Field wiring
▪
: Terminal block
▪
: Connector
▪
: Terminal
▪
: Protective earth (screw)
Note 3
For the connection of the wiring to outdoorindoor transmission terminals F1/F2, outdoorother systems transmission terminals F1/F2,
and master-slave transmission terminals Q1/
Q2, refer to the installation manual.
Note 4
When operating the unit, do not short-circuit
protection devices S1PH and S2PH.
Note 5
Colours:
▪ GRN: Green
Note 6
When using optional accessories, refer to their
respective installation manual.
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VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
Switch box
outdoor
outdoor
indoor
Terminal of
Outer shell
(NOTE6)
Layout of
Switch box
(NOTE3)
(NOTE3) (NOTE3)
18+20 HP
2D087543-50A
A1P
Printed circuit board (main)
E1HC, E2HC
Crankcase heater
A2P, A5P
Printed circuit board (noise filter)
F1U, F2U
Fuse (T, 3, 15 A, 250 V) (A1P) (A8P)
A3P, A6P
Printed circuit board (inverter)
F3U
Fuse (field-supplied)
A4P, A7P
Printed circuit board (fan)
F101U
Fuse (A4P) (A7P)
A8P
Printed circuit board (sub)
F400U
Fuse (A2P)
BS1~BS3
Push-button switch (A1P) (mode, set, return)
F410U~F412U
Fuse (A2P) (A5P)
C32, C66
Capacitor (A3P)
F601U
Fuse (A6P)
C47, C48
Capacitor (A6P)
HAP
DS1, DS2
DIP switch (A1P)
Pilot lamp (service monitor - green) (A1P)
(A8P)
K1M
Magnetic contactor (A3P) (A6P)
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12 Technical data
K1R
Magnetic relay (A3P) (A6P)
K3R
Magnetic relay (A2P) (A6P)
X10A
Connector (bottom plate heater – optional
accessory)
K3R
Magnetic relay (Y11S) (A1P)
X1M
Terminal block (power supply)
K4R
Magnetic relay (Y12S) (A1P)
X1M
Terminal block (control) (A1P)
K6R
Magnetic relay (optional bottom plate heater)
(A1P)
Y1E
Electronic expansion valve (upper heat
exchanger)
K7R
Magnetic relay (E1HC) (A1P)
Y2E
K8R
Magnetic relay (E2HC) (A1P)
Electronic expansion valve (subcool heat
exchanger)
K9R
Magnetic relay (Y3S) (A1P)
Y3E
Electronic expansion valve (lower heat
exchanger)
K11R
Magnetic relay (Y2S) (A1P)
Y4E
Electronic expansion valve (receiver gas)
K12R
Magnetic relay (Y4S) (A1P)
Y5E
Electronic expansion valve (inverter cooling)
K13R
Magnetic relay (Y5S) (A1P)
Y6E
Electronic expansion valve (auto charge)
L1R~L3R
Reactor
Y11S
Solenoid valve (M1C oil return)
M1C, M2C
Motor (compressor)
Y12S
Solenoid valve (M2C oil return)
M1F, M2F
Motor (fan)
Y2S
Solenoid valve (liquid pipe)
PS
Switching power supply (A1P) (A3P) (A6P)
(A8P)
Y3S
Solenoid valve (high pressure/low pressure
gas pipe)
Q1DI
Earth leakage breaker (field-supplied)
Y4S
Solenoid valve (lower heat exchanger)
Q1RP
Phase reversal detection circuit (A1P)
Y5S
Solenoid valve (upper heat exchanger)
R1
Resistor (current limiting) (A6P)
Z1C~Z7C
Noise filter (ferrite core)
R2, R3
Resistor (A3P)
Z1F
Noise filter (with surge absorber) (A2P) (A5P)
R24
Resistor (current sensor) (A4P) (A7P)
R77
Resistor (current sensor) (A3P)
R78
Resistor (current limiting) (A3P)
R313
Resistor (current sensor) (A6P)
R865, R867
Resistor (A6P)
R1T
Thermistor (air) (A1P)
R21T, R22T
Thermistor (M1C, M2C discharge) (A1P)
R3T
Thermistor (liquid main) (A1P)
R4T
Thermistor (upper heat exchanger – liquid)
(A1P)
R5T
Thermistor (lower heat exchanger – liquid)
(A1P)
R6T
Thermistor (subcool heat exchanger – gas)
(A1P)
R7T
Thermistor (subcool heat exchanger – liquid)
(A1P)
R8T
Thermistor (upper heat exchanger – gas)
(A1P)
R9T
Thermistor (lower heat exchanger – gas) (A1P)
R10T
Thermistor (suction) (A1P)
R11T
Thermistor (heat exchanger deicer) (A8P)
▪ BLK: Black
R12T
Thermistor (suction compressor) (A8P)
▪ RED: Red
R13T
Thermistor (receiver gas) (A8P)
▪ BLU: Blue
R14T
Thermistor (auto charge) (A8P)
▪ WHT: White
R15T
Thermistor (compressor body) (A1P)
▪ GRN: Green
S1NPH
Pressure sensor (high)
S1NPL
Pressure sensor (low)
S1PH, S2PH
Pressure switch (high)
SEG1~SEG3
7-segment display (A1P)
V1R
Power module (A3P) (A6P)
V1R
Power module (A4P) (A7P)
V2R
Power module (A6P)
X1A~X4A
Connector (M1F, M2F)
X5A, X6A
Connector (residual charge check)
Installer and user reference guide
70
Connector colour
Wire colour
Note 1
This wiring diagram only applies to the outdoor
unit.
Note 2
▪
: Field wiring
▪
: Terminal block
▪
: Connector
▪
: Terminal
▪
: Protective earth (screw)
Note 3
For the connection of the wiring to outdoorindoor transmission terminals F1/F2, outdoorother systems transmission terminals F1/F2,
and master-slave transmission terminals Q1/
Q2, refer to the installation manual.
Note 4
When operating the unit, do not short-circuit
protection devices S1PH and S2PH.
Note 5
Colours:
Note 6
When using optional accessories, refer to their
respective installation manual.
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VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
12.8
Technical specifications: Outdoor unit
INFORMATION
For technical and electrical details of
combinations, see technical engineering data.
multi
unit
Technical specifications
Specification
5 HP
8 HP
10 HP
Casing material
12 HP
14 HP
16 HP
18 HP
20 HP
Painted galvanised steel
Dimensions h×w×d
1685×930×765 mm
1685×1240×765 mm
Weight
Operation range
▪ Cooling (min./max.)
–5/43°C
▪ Heating (min./max.)
–20/21°C
Cooling(a)
▪ Capacity
▪ EER
14.0 kW
22.4 kW
28.0 kW
33.5 kW
40.0 kW
45.0 kW
50.4 kW
56.0 kW
4.42
4.22
3.92
3.63
3.74
3.52
3.32
3.01
16.0 kW
25.0 kW
31.5 kW
37.5 kW
45.0 kW
50.0 kW
56.5 kW
63.0 kW
4.92
4.54
4.27
3.98
3.98
3.88
3.95
3.60
(b)
Heating
▪ Capacity
▪ COP
PED
▪ Category
2
▪ Most critical part
Liquid receiver
▪ PS×V
564 bar×l
672 bar×l
Maximum number of indoor units
connected(c)
824 bar×l
64
Heat exchanger
▪ Type
cross fin
▪ Treatment
anti corrosion
Fan
▪ Type
propeller
▪ Quantity
1
▪ Air flow rate(d)
162 m3/min
2
175 m3/
min
▪ Motor
185 m3/
min
223 m3/
min
260 m3/
min
1
251 m3/
min
261 m3/
min
2
▪ Model
brushless DC
▪ Output/pcs
750 W
Compressor
▪ Quantity
1
2
▪ Model
inverter
▪ Type
hermetically sealed scroll compressor
▪ Crankcase heater
33 W
(e)
Sound level (nominal)
▪ Sound power(f)
77 dBA
▪ Sound pressure(g)
56 dBA
78 dBA
79 dBA
58 dBA
81 dBA
61 dBA
86 dBA
64 dBA
65 dBA
88 dBA
66 dBA
Refrigerant
▪ Type
R410A
▪ Charge
9.7 kg
9.8 kg
Refrigerant oil
9.9 kg
11.8 kg
Synthetic (ether) oil
Safety devices
▪ High pressure switch
▪ Fan driver overload protector
▪ Inverter overload protector
▪ PCB fuse
(a)
(b)
Nominal cooling capacities are based on indoor temperature 27°C DB and 19°C WB, outdoor temperature 35°C DB, equivalent refrigerant piping:
5 m, level difference: 0 m.
Nominal heating capacities are based on indoor temperature 20°C DB, outdoor temperature 7°C DB and 6°C WB, equivalent refrigerant piping:
5 m, level difference: 0 m.
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12 Technical data
(c)
(d)
(e)
(f)
(g)
Actual number of units depends on the indoor unit type (VRV DX, Hydrobox, ...) and the connection ratio restriction for the system
(50%≤CR≤130%).
Nominal at 230 V.
Sound values are measured in a semi-anechoic room.
Sound power level is an absolute value that a sound generates.
Sound pressure level is a relative value depending on the distance and acoustic environment. For more details, refer to sound level drawings in
the technical data book.
Electrical specifications
Specification
5 HP
8 HP
10 HP
12 HP
14 HP
16 HP
18 HP
20 HP
18.5 A
22 A
28.5 A
36.0 A
40.0 A
Power supply
▪ Name
Y1
▪ Phase
3N~
▪ Frequency
50 Hz
▪ Voltage
380-415 V
Current
▪ Nominal running current (RLA)(a)
4.1 A
7.7 A
10.5 A
13.8 A
▪ Starting current (MSC)(b)
▪ Minimum circuit amps (MCA)(c)
15 A
▪ Maximum fuse amps (MFA)(d)
20 A
▪ Total overcurrent amps (TOCA)
▪ Full load amps (FLA)(f)
Voltage range
15.6 A
≤MCA
(e)
21.0 A
17.3 A
1.2 A
21.0 A
28.0 A
25 A
21.1 A
1.3 A
32.0 A
32 A
40 A
50 A
35.4 A
1.5 A
1.8 A
42.7 A
2.6 A
380-415 ±10% V
Wiring connections
▪ For power supply
▪ For connection to indoor unit
Power supply intake
(a)
(b)
(c)
(d)
(e)
(f)
both indoor and outdoor unit
RLA is based on indoor unit temperature 27°C DB and 19°C WB, outdoor temperature 35°C DB.
MSC=the maximum current during startup of the compressor. VRV IV uses only inverter compressors. MCA must be used to select the correct
field wiring size. The MCA can be regarded as the maximum running current.
MCA must be used to select the correct field wiring size. The MCA can be regarded as the maximum running current.
MFA is used to select the circuit breaker and the ground fault circuit interrupter (earth leakage circuit breaker).
TOCA means the total value of each OC set.
FLA=nominal running current fan. Voltage range: units are suitable for use on electrical systems where voltage supplied to unit terminal is not
below or above listed range limits. Maximum allowable voltage range variation between phases is 2%.
Installer and user reference guide
72
5G
2 (F1/F2)
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VRV IV system air conditioner
4P353997-1B – 2016.07
12 Technical data
12.9
Capacity table: Indoor unit
Total capacity of indoor units needs to be within the specified range.
The connection ratio (CR): 50%≤CR≤130%.
HP class of
outdoor unit
50%
100%
130%
minimum CR
nominal CR
maximum CR
5
62.5
125
162.5
8
100
200
260
10
125
250
325
12
150
300
390
13
162.5
325
422.5
14
175
350
455
16
200
400
520
18
225
450
585
20
250
500
650
22
275
550
715
24
300
600
780
26
325
650
845
28
350
700
910
30
375
750
975
32
400
800
1040
34
425
850
1105
36
450
900
1170
38
475
950
1235
40
500
1000
1300
42
525
1050
1365
44
550
1100
1430
46
575
1150
1495
48
600
1200
1560
50
625
1250
1625
52
650
1300
1690
54
675
1350
1755
NOTICE
When selecting the total capacity higher than mentioned in
above table, cooling and heating capacity will drop. For
additional information see technical engineering data.
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73
13 About the system
For the user
13
1
a
About the system
The indoor unit part of VRV IV heat recovery system can be used for
heating/cooling applications. The type of indoor unit which can be
used depends on the outdoor units series.
NOTICE
c
b
c
e
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.
2
c
f
e
h
NOTICE
k
For future modifications or expansions of your system:
k
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.
k
l
3
4
c
d
c
i
In general following type of indoor units can be connected to a VRV
IV heat recovery system (not exhaustive list, depending on outdoor
unit model and indoor unit model combinations):
e
e
j
e
▪ VRV direct expansion (DX) indoor units (air-to-air applications).
▪ HT (high temperature) Hydrobox (air-to-water applications): HXHD
series (heating only).
▪ LT (low temperature)
HXY080/125 series.
Hydrobox
(air-to-water
k
e
▪ Comfort air curtain (air-to-air applications): CYVS (Biddle) series.
System layout
Model
Description
Heat recovery model for single or multi-use
REMQ5
Heat recovery model for multi-use only
Depending on the type of outdoor unit which is chosen, some
functionality will or will not exist. It will be indicated throughout this
operation manual when certain features have exclusive model rights
or not.
k
g
k
l
a
b
c
d
e
f
g
h
i
j
k
l
Your VRV IV heat recovery series outdoor unit can be one of
following models:
REYQ8~20
k
c
▪ AHU (air-to-air applications): EKEXV-kit+EKEQM-box required,
depending on the application.
13.1
k
5
applications):
Outdoor unit
Refrigerant piping
BS unit
Multi BS unit
VRV DX indoor unit
LT Hydrobox unit
Cooling-only VRV indoor unit
HT Hydrobox unit
EKEXV kit
AHU
User interface
Wireless user interface
The complete system can be divided into several sub-systems.
These sub-systems have 100% independence regarding the
selection of cooling and heating operation, and each consists of one
single BS unit or one individual branch set of a multi BS unit, and all
indoor units connected downstream. When using a cool/heat
selector, connect this to the BS unit.
14
User interface
CAUTION
Never touch the internal parts of the controller.
Do not remove the front panel. Some parts inside are
dangerous to touch and appliance problems may happen.
For checking and adjusting the internal parts, contact your
dealer.
This operation manual will give a non-exhaustive overview of the
main functions of the system.
Installer and user reference guide
74
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
15 Before operation
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.
15
Before operation
WARNING
Special operation ranges are valid in case of using Hydrobox units or
AHU. They can be found in the installation/operation manual of the
dedicated unit. Latest information can be found in the technical
engineering data.
16.2
Operating the system
16.2.1
About operating the system
This unit contains electrical and hot parts.
▪ Operation procedure varies according to the combination of
outdoor unit and user interface.
WARNING
▪ To protect the unit, turn on the main power switch 6 hours before
operation.
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
CAUTION
It is not good for your health to expose your body to the air
flow for a long time.
16.2.2
CAUTION
▪ 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).
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
CAUTION
Do not operate the system when using a room 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.
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.
About cooling, heating, fan only, and
automatic operation
▪ When the display
"change-over under centralised control"
flashes, refer to "16.5.1 About setting the master user
interface" on page 77.
▪ 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.
16.2.3
About the heating operation
It may take longer to reach the set temperature for general heating
operation than for cooling operation.
Operation modes (depending on indoor unit type):
▪ Heating and cooling (air to air).
▪ Fan only operation (air to air).
The following operation is performed in order to prevent the heating
capacity from dropping or cold air from blowing.
▪ Heating and cooling (air to water).
Defrost operation
▪ Domestic hot water 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.
Dedicated functions exist depending on the type of indoor unit, refer
to dedicated installation/operation manual for more information.
In case of
16
Operation
16.1
Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
Outdoor temperature
Cooling
Heating
–5~43°C DB
–20~20°C DB
–20~15.5°C WB
Indoor temperature
21~32°C DB
15~27°C DB
(a)
≤80%
The indoor unit will continue heating
operation at a reduced level during defrost
operation. It will guarantee a decent comfort
level indoor.
REYQ8~20 single
models
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
.
Hot start
14~25°C WB
Indoor humidity
Then
REYQ10~54 multimodels
(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.
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.
Above operation range is only valid in case direct expansion indoor
units are connected to the VRV IV system.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
75
16 Operation
Result: The operation lamp lights up and the system starts
operating.
INFORMATION
▪ The heating capacity drops when the outside
temperature falls. If this happens, use another heating
device together with the unit. (When using together with
appliances that produce open fire, ventilate the room
constantly). Do not place appliances that produce open
fire in places exposed to the air flow from the unit or
under the unit.
To stop
3
Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
▪ It takes some time to heat up the room from the time
the unit is started since the unit uses a hot-air
circulating system to heat the entire room.
▪ If the hot air rises to the ceiling, leaving the area above
the floor cold, we recommend that you use the
circulator (the indoor fan for circulating air). Contact
your dealer for details.
16.2.4
1
To operate the system (WITHOUT cool/
heat changeover remote control switch)
Press the operation mode selector button on the user interface
several times and select the operation mode of your choice.
Cooling operation
To adjust
For programming temperature, fan speed and air flow direction refer
to the operation manual of the user interface.
16.3
Using the dry program
16.3.1
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).
Heating operation
▪ The system does not go into operation if the room temperature is
low (<20°C).
Fan only operation
2
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.
16.2.5
To operate the system (WITH cool/heat
changeover remote control switch)
Overview of the changeover remote control switch
a
a
16.3.2
To start
1
Press the operation mode selector button on the user interface
(program dry operation).
several times and select
2
Press the ON/OFF button of the user interface.
FAN ONLY/AIR CONDITIONING
SELECTOR SWITCH
Set the switch to
for fan only
Result: The operation lamp lights up and the system starts
operating.
3
operation or to
for heating or
cooling operation.
b
b
COOL/HEAT CHANGEOVER SWITCH
Set the switch to
for heating
for cooling or to
Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to "16.4 Adjusting the air flow direction" on page 77 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
To start
1
To use the dry program (WITHOUT cool/
heat changeover remote control switch)
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
Select operation mode with the cool/heat changeover switch as
follows:
Cooling operation
Heating operation
Fan only operation
16.3.3
To use the dry program (WITH cool/heat
changeover remote control switch)
To start
1
1
1
1
Select cooling operation mode with the cool/heat changeover
remote control switch.
1
1
1
1
2
2
Press the ON/OFF button on the user interface.
Installer and user reference guide
76
Press the operation mode selector button on the user interface
several times and select
(program dry operation).
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
16 Operation
3
Press the ON/OFF button of the user interface.
Result: The operation lamp lights up and the system starts
operating.
4
Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to "16.4 Adjusting the air flow direction" on page 77 for details.
16.5
Setting the master user interface
16.5.1
About setting the master user interface
a
To stop
5
Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
b
b
c
c
c
c
a
b
c
d
e
Outdoor unit
BS unit
VRV DX indoor unit
HT Hydrobox unit
User interface
d
NOTICE
e
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
16.4
Adjusting the air flow direction
Refer to the operation manual of the user interface.
16.4.1
About the air flow flap
Double flow+multi-flow units
Corner units
e
e
e
e
When the system is installed as shown in the figure above, it is
necessary to – for each subsystem – 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.
Only the master user interface can select heating or cooling mode.
Ceiling suspended units
16.5.2
Wall-mounted units
1
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
▪ 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.
▪ When continuous operation with downward air flow is performed
at the time of cooling with a ceiling-suspended or a wall-mounted
unit, the micro computer may control the flow direction, and then
the user interface indication will also change.
The air flow direction can be adjusted in one of the following ways:
▪ The air flow flap itself adjusts its position.
▪ The air flow direction can be fixed by the user.
▪ Automatic
and desired position
.
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.
Heating
Cooling
To designate the master user interface
(VRV DX and Hydrobox)
2
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).
16.6
About control systems
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:
Type
Group control 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.
Description
One user interface controls up to 16
indoor units. All indoor units are equally
set.
Two user interface control Two user interfaces control one indoor
system
unit (in case of group control system,
one group of indoor units). The unit is
individually operated.
NOTICE
▪ The movable limit of the flap is changeable. Contact
your dealer for details. (only for double-flow, multi-flow,
corner, ceiling-suspended and wall-mounted).
. It may
▪ Avoid operating in the horizontal direction
cause dew or dust to settle on the ceiling or flap.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
NOTICE
Contact your dealer in case of changing the combination or
setting of group control and two user interface control
systems.
Installer and user reference guide
77
17 Energy saving and optimum operation
17
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.
▪ 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.)
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.
17.2
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
▪ Quick
▪ Mild
▪ Eco
INFORMATION
Combinations of Automatic mode together with Hydrobox
applications should be considered. The effect of the energy
saving function can be very small when low/high (cooling/
heating) leaving water temperatures are requested.
▪ 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.)
▪ 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 VRV IV heat recovery 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.
Available comfort settings
18
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
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.
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.
17.1
CAUTION
Available main operation methods
Pay attention to the fan.
Basic
It is dangerous to inspect the unit while the fan is running.
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.
Be sure to turn off the main switch before executing any
maintenance task.
Automatic
CAUTION
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).
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
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
78
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
18 Maintenance and service
18.1
NOTICE
WARNING
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.
The refrigerant in the system is safe and normally does not
leak. If the refrigerant leaks in the room, contact with a fire
of a burner, a heater or a cooker may result in a harmful
gas.
Turn off any combustible heating devices, ventilate the
room and contact the dealer where you purchased the unit.
Do not use the system until a service person confirms that
the portion where the refrigerant leaks is repaired.
Maintenance after a long stop
period
E.g., at the beginning of the season.
18.4
After-sales service and warranty
▪ Check and remove everything that might be blocking inlet and
outlet vents of indoor units and outdoor units.
18.4.1
Warranty period
▪ 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.
▪ 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.
▪ 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.
18.4.2
18.2
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 "16.2.2 About
cooling, heating, fan only, and automatic operation" on page 75
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.
18.3
▪ If repairs to the product are necessary within the warranty period,
contact your dealer and keep the warranty card at hand.
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
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
▪ 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.
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
Please contact your installer for more information.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Recommended maintenance and
inspection
18.4.3
Recommended maintenance and
inspection cycles
Be aware that the mentioned maintenance and replacement cycles
do not relate to the warranty period of the components.
Installer and user reference guide
79
19 Troubleshooting
Component
Electric motor
Inspection
cycle
Maintenance cycle
(replacements and/or
repairs)
1 year
20,000 hours
PCB
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.
25,000 hours
Heat exchanger
5 years
Sensor (thermistor, etc.)
5 years
User interface and switches
25,000 hours
Drain pan
8 years
Expansion valve
20,000 hours
Solenoid valve
20,000 hours
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.
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.
▪ 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.
18.4.4
Shortened maintenance and replacement
cycles
Shortening of "maintenance cycle" and "replacement cycle" needs to
be considered in following situations:
▪ Heat and humidity fluctuate out of the ordinary.
▪ Power fluctuation is high (voltage, frequency, wave distortion, etc.)
(the unit cannot be used if power fluctuation is outside the
allowable range).
▪ Bumps and vibrations are frequent.
▪ Dust, salt, harmful gas or oil mist such as sulphurous acid and
hydrogen sulfide may be present in the air.
▪ The machine is started and stopped frequently or operation time is
long (sites with 24 hour air-conditioning).
Recommended replacement cycle of wear parts
Air filter
High efficiency filter
Fuse
Crankcase heater
Pressure containing parts
Installer and user reference guide
80
Troubleshooting
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
WARNING
Stop operation and shut off the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electric shock or fire. Contact your dealer.
The system must be repaired by a qualified service person:
Malfunction
Measure
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates or the ON/OFF
switch does not properly work.
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.
The unit is used in locations where:
Component
19
Inspection
cycle
Maintenance cycle
(replacements and/or
repairs)
1 year
5 years
1 year
10 years
8 years
In case of corrosion,
contact your local dealer.
If the system does not properly operate except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system according to the following
procedures.
Malfunction
Measure
If the system does not ▪ 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.
▪ Check if no fuse has blown or breaker
has worked. Change the fuse or reset the
breaker if necessary.
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
"18 Maintenance and service" on
page 78 and "Maintenance" in the indoor
unit manual.)
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
19 Troubleshooting
Malfunction
The system operates
but cooling or heating
is insufficient.
Measure
▪ 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).
Main code
Contents
Electronic expansion valve malfunction (outdoor)
Discharge temperature malfunction (outdoor)
Abnormal suction temperature (outdoor)
Refrigerant overcharge detection
High pressure switch malfunction
Low pressure switch malfunction
▪ Check the temperature setting.
Fan motor trouble (outdoor)
▪ Check the fan speed setting on your user
interface.
Ambient temperature sensor malfunction (outdoor)
▪ Check for open doors or windows. Shut
doors and windows to prevent wind from
coming in.
Current sensor malfunction
▪ 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 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).
Pressure sensor malfunction
Discharge temperature sensor malfunction (outdoor)
Heat exchanger gas temperature sensor malfunction
(outdoor)
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)
Gas temperature sensor (after subcool HE)
malfunction (outdoor)
High pressure sensor malfunction (S1NPH)
Low pressure sensor malfunction (S1NPL)
INV PCB abnormal
19.1
Error codes: Overview
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).
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
Contents
Fin temperature abnormal
Inverter PCB faulty
Compressor over current detected
Compressor lock (startup)
Transmission outdoor unit - inverter: INV transmission
trouble
INV unbalanced power supply voltage
Autocharge operation related
Fin thermistor malfunction
External protection device was activated
Autocharge operation related
EEPROM failure (indoor)
Autocharge operation related
Drain system malfunction (indoor)
Autocharge operation related
Fan motor malfunction (indoor)
Capacity setting malfunction (outdoor)
Swing flap motor malfunction (indoor)
Abnormal low pressure drop, faulty expansion valve
Expansion valve malfunction (indoor)
Reversed power supply phase malfunction
Drain malfunction (indoor unit)
INV voltage power shortage
Filter dust chamber malfunction (indoor)
System test run not yet executed
Capacity setting malfunction (indoor)
Faulty wiring indoor/outdoor
Transmission malfunction between main PCB and sub
PCB (indoor)
Abnormal user interface - indoor communication
Heat exchanger thermistor malfunction (indoor; liquid)
Abnormal main-sub user interface communication
Heat exchanger thermistor malfunction (indoor; gas)
System mismatch. Wrong type of indoor units
combined. Indoor unit malfunction.
Suction air thermistor malfunction (indoor)
Discharge air thermistor malfunction (indoor)
Movement detector or floor temperature sensor
malfunction (indoor)
Faulty wiring to outdoor/outdoor
Connection malfunction over indoor units or type
mismatch
Centralised address duplication
PCB malfunction (outdoor)
Malfunction in communication centralised control
device - indoor unit
Current leakage detector was activated (outdoor)
Auto address malfunction (inconsistency)
High pressure switch was activated
Auto address malfunction (inconsistency)
User interface thermistor malfunction (indoor)
Low pressure malfunction (outdoor)
Compressor lock detection (outdoor)
Fan motor malfunction (outdoor)
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
81
19 Troubleshooting
19.2
Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
19.2.1
Symptom: The system does not operate
▪ The air conditioner does not start immediately after the ON/OFF
button on the user interface is pressed. If the operation lamp
lights, the system is in normal condition. To prevent overloading of
the compressor motor, the air conditioner starts 5 minutes after it
is turned ON again in case it was turned OFF just before. The
same starting delay occurs after the operation mode selector
button was used.
▪ If "Under Centralized Control" is displayed on the user interface,
pressing the operation button causes the display to blink for a few
seconds. The blinking display indicates that the user interface
cannot be used.
▪ The system does not start immediately after the power supply is
turned on. Wait one minute until the micro computer is prepared
for operation.
19.2.2
Symptom: Cool/Heat cannot be changed
over
▪ When the display shows
(change-over under centralized
control), it shows that this is a slave user interface.
▪ When the cool/heat changeover remote control switch is installed
and the display shows
(change-over under centralized
control), this is because cool/heat changeover is controlled by the
cool/ heat changeover remote control switch. Ask your dealer
where the remote control switch is installed.
19.2.3
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 (max.) till this process is
finished.
19.2.4
Symptom: The fan strength does not
correspond to the setting
The fan speed does not change even if the fan speed adjustment
button in pressed. During heating operation, when the room
temperature reaches the set temperature, the outdoor unit goes off
and the indoor unit changes to whisper fan speed. This is to prevent
cold air blowing directly on occupants of the room. The fan speed
will not change even when another indoor unit is in heating
operation, if the button is pressed.
19.2.5
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.
19.2.6
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.
19.2.7
Symptom: White mist comes out of a unit
(Indoor unit, outdoor unit)
When the system is changed over to heating operation after defrost
operation. Moisture generated by defrost becomes steam and is
exhausted.
19.2.8
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.
19.2.9
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.
19.2.10 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.
19.2.11 Symptom: Noise of air conditioners
(Outdoor unit)
When the tone of operating noise changes. This noise is caused by
the change of frequency.
19.2.12 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.
19.2.13 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emit it again.
19.2.14 Symptom: The outdoor unit fan does not
spin
During operation. The speed of the fan is controlled in order to
optimise product operation.
Installer and user reference guide
82
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
20 Relocation
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 one minute.
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.
19.2.16 Symptom: The compressor in the outdoor
unit does not stop after a short heating
operation
Optional equipment
Equipment made or approved by Daikin that can be
combined with the product according to the instructions in
the accompanying documentation.
19.2.15 Symptom: The display shows "88"
This is to prevent refrigerant from remaining in the compressor. The
unit will stop after 5 to 10 minutes.
19.2.17 Symptom: The inside of an outdoor unit is
warm even when the unit has stopped
Field supply
Equipment not made by Daikin that can be combined with
the product according to the instructions in the
accompanying documentation.
This is because the crankcase heater is warming the compressor so
that the compressor can start smoothly.
19.2.18 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.
20
Relocation
Contact your dealer for removing and reinstalling the total unit.
Moving units requires technical expertise.
21
Disposal
This unit uses hydrofluorocarbon. Contact your dealer when
discarding this unit. It is required by law to collect, transport and
discard the refrigerant in accordance with the "hydrofluorocarbon
collection and destruction" regulations.
22
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.
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353997-1B – 2016.07
Installer and user reference guide
83
4P353997-1B 2016.07
Copyright 2014 Daikin