Installer and user
reference guide
VRV IV heat pump for indoor installation
RKXYQ5T7Y1B
RDXYQ5T7V1B* RKXYQ8T7Y1B
RDXYQ8T7V1B
Installer and user reference guide
VRV IV heat pump for indoor installation
English
Table of Contents
6.2.1
6.2.2
6.2.3
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
3 About the box
7
3.3
4 About the units and options
4.1
4.2
4.3
4.4
4.5
Overview: About the units and options......................................
Identification ..............................................................................
4.2.1
Identification label: Compressor unit...........................
4.2.2
Identification label: Heat exchanger unit .....................
About the compressor unit and heat exchanger unit.................
System layout............................................................................
Combining units and options .....................................................
4.5.1
About combining units and options .............................
4.5.2
Possible combinations of indoor units.........................
4.5.3
Possible options for the compressor unit and heat
exchanger unit ............................................................
5 Preparation
5.1
5.2
5.3
5.4
Overview: Preparation...............................................................
Preparing installation site ..........................................................
5.2.1
Installation site requirements of the compressor unit..
5.2.2
Installation site requirements of the heat exchanger
unit ..............................................................................
5.2.3
Securing safety against refrigerant leaks....................
Preparing refrigerant piping.......................................................
5.3.1
Refrigerant piping requirements..................................
5.3.2
Refrigerant piping material..........................................
5.3.3
To select the piping size .............................................
5.3.4
To select refrigerant branch kits..................................
5.3.5
Refrigerant piping length and height difference ..........
Preparing electrical wiring .........................................................
5.4.1
About electrical compliance ........................................
5.4.2
Safety device requirements ........................................
6 Installation
6.1
6.2
2
7
8
8
8
8
8
8
9
9
9
6.6
6.7
6.8
9
9
9
9
9
10
10
10
10
10
10
11
11
6.9
6.10
6.11
12
12
12
12
13
13
14
14
14
15
15
16
16
16
16
17
Overview: Installation ................................................................ 17
Opening the units ...................................................................... 17
Installer and user reference guide
6.5
7
7
Overview: About the box ...........................................................
Compressor unit ........................................................................
3.2.1
To unpack the compressor unit...................................
3.2.2
To handle the compressor unit ...................................
3.2.3
To remove the accessories from the compressor unit
3.2.4
To remove the transportation stay ..............................
3.2.5
To remove the transportation EPS..............................
Heat exchanger unit ..................................................................
3.3.1
To unpack the heat exchanger unit.............................
3.3.2
To handle the heat exchanger unit .............................
3.3.3
To remove the accessories from the heat exchanger
unit ..............................................................................
3.3.4
To remove the transportation sheet ............................
6.4
7
For the installer
3.1
3.2
6.3
About opening the units ...............................................
To open the compressor unit .......................................
To open the switch box cover of the heat exchanger
unit ...............................................................................
Mounting the compressor unit ....................................................
6.3.1
Precautions when mounting the compressor unit ........
6.3.2
Guidelines when installing the compressor unit...........
Mounting the heat exchanger unit ..............................................
6.4.1
Precautions when mounting the heat exchanger unit ..
6.4.2
Guidelines when installing the heat exchanger unit.....
6.4.3
Guidelines when installing the ducting.........................
6.4.4
Guidelines when installing the drain piping..................
Connecting the refrigerant piping ...............................................
6.5.1
About connecting the refrigerant piping .......................
6.5.2
Precautions when connecting the refrigerant piping ....
6.5.3
Pipe bending guidelines...............................................
6.5.4
To braze the pipe end ..................................................
6.5.5
Using the stop valve and service port ..........................
6.5.6
To remove the pinched pipes.......................................
6.5.7
To connect the refrigerant piping to the compressor
unit ...............................................................................
6.5.8
To connect the refrigerant piping to the heat
exchanger unit .............................................................
6.5.9
To connect the refrigerant branching kit ......................
Checking the refrigerant piping ..................................................
6.6.1
About checking the refrigerant piping ..........................
6.6.2
Checking refrigerant piping: General guidelines ..........
6.6.3
Checking refrigerant piping: Setup...............................
6.6.4
To perform a leak test ..................................................
6.6.5
To perform vacuum drying ...........................................
To insulate the refrigerant piping................................................
Charging refrigerant ...................................................................
6.8.1
About charging refrigerant ...........................................
6.8.2
Precautions when charging refrigerant ........................
6.8.3
To determine the additional refrigerant amount ...........
6.8.4
To charge refrigerant ...................................................
6.8.5
Error codes when charging refrigerant.........................
6.8.6
To fix the fluorinated greenhouse gases label .............
Connecting the electrical wiring..................................................
6.9.1
About connecting the electrical wiring..........................
6.9.2
Precautions when connecting electrical wiring ............
6.9.3
Guidelines when connecting the electrical wiring ........
6.9.4
To connect the electrical wiring on the compressor
unit ...............................................................................
6.9.5
To connect the electrical wiring on the heat
exchanger unit .............................................................
Finishing the compressor unit installation ..................................
6.10.1 To finish the transmission wiring..................................
6.10.2 To close the compressor unit.......................................
Finishing the heat exchanger unit installation ............................
6.11.1 To close the heat exchanger unit.................................
7 Configuration
7.1
7.2
7.3
17
17
17
18
18
18
18
18
18
18
19
20
20
20
20
20
21
21
22
23
23
24
24
24
24
25
25
25
26
26
26
26
26
28
28
28
28
29
30
30
31
32
32
32
32
32
32
Overview: Configuration .............................................................
Making field settings...................................................................
7.2.1
About making field settings ..........................................
7.2.2
To access the field setting components.......................
7.2.3
Field setting components .............................................
7.2.4
To access mode 1 or 2 ................................................
7.2.5
To use mode 1 (and default situation) .........................
7.2.6
To use mode 2 .............................................................
7.2.7
Mode 1 (and default situation): Monitoring settings .....
7.2.8
Mode 2: Field settings..................................................
7.2.9
To connect the PC configurator to the compressor
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 ...................
32
32
32
33
33
34
34
35
35
37
40
40
40
40
41
42
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
1 General safety precautions
8 Commissioning
8.1
8.2
8.3
8.4
Overview: Commissioning.........................................................
Precautions when commissioning .............................................
Checklist before commissioning................................................
Checklist during commissioning ................................................
8.4.1
About test run..............................................................
8.4.2
To perform a test run (7-LEDs display).......................
8.4.3
To perform a test run (7-segments display) ................
8.4.4
Correcting after abnormal completion of the test run..
8.4.5
Operating the unit .......................................................
42
42
42
43
43
43
44
44
44
45
9 Hand-over to the user
45
10 Maintenance and service
45
10.1
10.2
10.3
10.4
Overview: Maintenance and service .........................................
Maintenance safety precautions................................................
10.2.1 To prevent electrical hazards......................................
Checklist for yearly maintenance of the heat exchanger unit....
About service mode operation...................................................
10.4.1 To use vacuum mode .................................................
10.4.2 To recover refrigerant .................................................
11 Troubleshooting
11.1
11.2
11.3
Overview: Troubleshooting........................................................
Precautions when troubleshooting ............................................
Solving problems based on error codes....................................
11.3.1 Error codes: Overview ................................................
50
Piping diagram: Compressor unit and heat exchanger unit ...... 50
Wiring diagram: Compressor unit.............................................. 51
Wiring diagram: Heat exchanger unit ........................................ 52
For the user
52
14 About the system
52
System layout............................................................................ 52
15 User interface
53
16 Before operation
53
17 Operation
53
17.1
17.2
17.3
17.4
17.5
Operation range ........................................................................
Operating the system ................................................................
17.2.1 About operating the system ........................................
17.2.2 About cooling, heating, fan only, and automatic
operation .....................................................................
17.2.3 About the heating operation........................................
17.2.4 To operate the system (WITHOUT cool/heat
changeover remote control switch) .............................
17.2.5 To operate the system (WITH cool/heat changeover
remote control switch).................................................
Using the dry program...............................................................
17.3.1 About the dry program ................................................
17.3.2 To use the dry program (WITHOUT cool/heat
changeover remote control switch) .............................
17.3.3 To use the dry program (WITH cool/heat changeover
remote control switch).................................................
Adjusting the air flow direction...................................................
17.4.1 About the air flow flap .................................................
Setting the master user interface ..............................................
17.5.1 About setting the master user interface ......................
17.5.2 To designate the master user interface (VRV DX)......
17.5.3 About control systems.................................................
18 Energy saving and optimum operation
18.1
18.2
20.1
20.2
46
46
46
46
13 Technical data
53
53
53
56
Maintenance after a long stop period .........................................
Maintenance before a long stop period ......................................
About the refrigerant...................................................................
After-sales service and warranty ................................................
19.4.1 Warranty period ...........................................................
19.4.2 Recommended maintenance and inspection...............
19.4.3 Recommended maintenance and inspection cycles....
19.4.4 Shortened maintenance and replacement cycles ........
20 Troubleshooting
46
50
14.1
19.1
19.2
19.3
19.4
45
45
45
45
45
45
46
12 Disposal
13.1
13.2
13.3
19 Maintenance and service
57
57
57
57
57
57
58
58
58
Error codes: Overview................................................................
Symptoms that are NOT system malfunctions ...........................
20.2.1 Symptom: The system does not operate .....................
20.2.2 Symptom: Cool/Heat cannot be changed over ............
20.2.3 Symptom: Fan operation is possible, but cooling and
heating do not work......................................................
20.2.4 Symptom: The fan strength does not correspond to
the setting ....................................................................
20.2.5 Symptom: The fan direction does not correspond to
the setting ....................................................................
20.2.6 Symptom: White mist comes out of a unit (Indoor
unit) ..............................................................................
20.2.7 Symptom: White mist comes out of a unit (Indoor
unit, heat exchanger unit) ............................................
20.2.8 Symptom: The user interface display reads "U4" or
"U5" and stops, but then restarts after a few minutes..
20.2.9 Symptom: Noise of air conditioners (Indoor unit, heat
exchanger unit) ............................................................
20.2.10 Symptom: Noise of air conditioners (Indoor unit,
compressor unit, heat exchanger unit).........................
20.2.11 Symptom: Noise of air conditioners (compressor
unit, heat exchanger unit) ............................................
20.2.12 Symptom: Dust comes out of the heat exchanger
unit ...............................................................................
20.2.13 Symptom: The units can give off odours......................
20.2.14 Symptom: The heat exchanger unit fan does not spin.
20.2.15 Symptom: The display shows "88"...............................
20.2.16 Symptom: The compressor in the compressor unit
does not stop after a short heating operation ..............
20.2.17 Symptom: The inside of an compressor unit is warm
even when the unit has stopped ..................................
20.2.18 Symptom: Hot air can be felt when the indoor unit is
stopped ........................................................................
59
60
60
60
60
60
60
60
60
60
60
60
60
60
60
61
61
61
61
61
21 Relocation
61
22 Disposal
61
23 Glossary
61
53
53
1
General safety precautions
54
54
54
1.1
About the documentation
54
▪ The precautions described in this document cover very important
topics, follow them carefully.
54
55
55
55
55
55
55
56
56
▪ The original documentation is written in English. All other
languages are translations.
▪ The installation of the system, and all activities described in the
installation manual and the installer reference guide must be
performed by an authorized installer.
1.1.1
Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
Available main operation methods ............................................ 56
Available comfort settings ......................................................... 56
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
3
1 General safety precautions
DANGER: RISK OF ELECTROCUTION
▪ Units are marked with the following symbol:
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING
Indicates a situation that could result in burning because of
extreme hot or cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious
injury.
WARNING: FLAMMABLE MATERIAL
This means that electrical and electronic products may not be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: the dismantling of the system, treatment of
the refrigerant, of oil and of other parts must be done by an
authorized installer and must comply with applicable legislation.
Units must be treated at a specialized treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health. For more information,
contact your installer or local authority.
▪ Batteries are marked with the following symbol:
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
To prevent electric shocks or fire:
▪ Do NOT rinse the unit.
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.
▪ Do NOT operate the unit with wet hands.
WARNING
▪ Do NOT place any objects containing water on the unit.
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
DANGER: RISK OF BURNING
▪ Do NOT touch the refrigerant piping, water piping or
internal parts during and immediately after operation. It
could be too hot or too cold. Give it time to return to
normal temperature. If you must touch it, wear
protective gloves.
▪ Do NOT touch any accidental leaking refrigerant.
Installer and user reference guide
4
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
1 General safety precautions
WARNING
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.
During tests, NEVER pressurize the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).
WARNING
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.
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ Toxic gas may be produced if refrigerant gas comes
into contact with fire.
NOTICE
DANGER: RISK OF EXPLOSION
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leakage in the refrigerant
circuit:
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
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
Installation site
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the unit's weight and
vibration.
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit. Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
WARNING
Always recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
NOTICE
▪ Make sure the area is well ventilated. Do NOT block any
ventilation openings.
▪ To avoid compressor breakdown, do NOT charge more
than the specified amount of refrigerant.
▪ Make sure the unit is level.
▪ When the refrigerant system is to be opened,
refrigerant must be treated according to the applicable
legislation.
Do NOT install the unit in the following places:
▪ In potentially explosive atmospheres.
WARNING
▪ In places where there is machinery that emits electromagnetic
waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
▪ In places where there is a risk of fire due to the leakage of
flammable gases (example: thinner or gasoline), carbon fibre,
ignitable dust.
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
1.3.3
Refrigerant
If applicable. See the installation manual or installer reference guide
of your application for more information.
▪ In case re-charge is required, refer to the nameplate of the unit. It
states the type of refrigerant and necessary amount.
▪ The unit is factory charged with refrigerant and depending on pipe
sizes and pipe lengths some systems require additional charging
of refrigerant.
▪ Only use tools exclusively for the refrigerant type used in the
system, this to ensure pressure resistance and prevent foreign
materials from entering into the system.
▪ Charge the liquid refrigerant as follows:
If
NOTICE
A siphon tube is present
Make sure refrigerant piping installation complies with
applicable legislation. In Europe, EN378 is the applicable
standard.
(i.e., the cylinder is marked with
"Liquid filling siphon attached")
Then
Charge with the cylinder upright.
NOTICE
Make sure the field piping and connections are not
subjected to stress.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
5
1 General safety precautions
If
A siphon tube is NOT present
Then
Charge with the cylinder upside
down.
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.
▪ Open refrigerant cylinders slowly.
▪ Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
1.3.4
CAUTION
▪ Do NOT touch electrical components with wet hands.
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.
▪ Do NOT leave the unit unattended when the service
cover is removed.
Brine
If applicable. See the installation manual or installer reference guide
of your application for more information.
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
WARNING
▪ ONLY use copper wires.
The selection of the brine MUST be in accordance with the
applicable legislation.
▪ Make sure the field wiring complies with the applicable
legislation.
WARNING
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
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
▪ 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.
Water
If applicable. See the installation manual or installer reference guide
of your application for more information.
▪ 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
Make sure water quality complies with EU directive
98/83 EC.
Installer and user reference guide
6
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
2 About the documentation
NOTICE
2
About the documentation
▪ Do not connect wiring of different thicknesses to the
power terminal block (slack in the power wiring may
cause abnormal heat).
2.1
About this document
▪ When connecting wiring which is the same thickness,
do as shown in the figure below.
Authorised installers + end users
Precautions when laying power wiring:
Target audience
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.
▪ For wiring, use the designated power wire and connect
firmly, then secure to prevent outside pressure being
exerted on the terminal board.
Documentation set
This document is part of a documentation set. The complete set
consists of:
▪ Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage the head and make proper tightening
impossible.
▪ General safety precautions:
▪ Over-tightening the terminal screws may break them.
▪ Compressor unit installation and operation manual:
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.
▪ Safety instructions that you must read before installing
▪ Format: Paper (in the accessory bag of the compressor unit)
▪ Installation and operation instructions
▪ Format: Paper (in the accessory bag of the compressor unit)
▪ Heat exchanger unit installation manual:
▪ Installation instructions
▪ Format: Paper (in the accessory bag of the heat exchanger
unit)
▪ Installer and user reference guide:
▪ Preparation of the
reference data,…
installation,
technical
specifications,
▪ 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.
For the installer
3
About the box
3.1
Overview: About the box
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
▪ When handling the unit, take into account the following:
This chapter describes what you have to do after the boxes with the
compressor unit and the heat exchanger unit are delivered on-site.
It contains information about:
▪ Unpacking and handling the units
▪ Removing the accessories from the units
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.
▪ Removing the transportation stay (only for RKXYQ5)
▪ Removing the transportation EPS (only for RKXYQ8)
▪ Removing the transportation sheet from the heat exchanger unit
Keep the following in mind:
▪ At delivery, the unit must be checked for damage. Any damage
must be reported immediately to the carrier's claims agent.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
7
3 About the box
5 HP
3.2
Compressor unit
3.2.1
To unpack the compressor unit
1
2
a
d
1×
c
1×
1×
4×
8 HP
a+b
c+d
3.2.2
b
1×
b
1×
c d
e
1× 1×
1×
5 HP
8 HP
a Gas
Ø19.1 mm
Ø22.2 mm
b Liquid
Ø12.7 mm
Ø12.7 mm
Piping accessories for circuit 2 (to the indoor units)
▪ With packing. Use a forklift.
3.2.4
1×
Piping accessories for circuit 1 (to the heat exchanger unit)
To handle the compressor unit
e
a
5 HP
8 HP
c Gas
Ø15.9 mm
Ø19.1 mm
d Liquid
Ø9.5 mm
Ø9.5 mm
Piping adapter (Ø19.1→22.2 mm) that you need when
connecting piping to the heat exchanger unit (only for
8 HP)
To remove the transportation stay
Only for RKXYQ5.
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
▪ Without packing. Carry the unit slowly as shown:
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.
3.2.3
1
To remove the accessories from the
compressor unit
1
Slightly loosen the fixing nut (a).
2
Remove the transportation stay (b) as shown in the figure
below.
3
Tighten the fixing nut (a) again.
Remove the accessories (part 1).
a
1×
b
1×
c
1×
d
1×
e
1×
f
3×
3
(10.1 N·m)
1
a
b
c
d
e
f
2
Remove the service cover. See "6.2.2 To open the compressor
unit" on page 17.
3
Remove the accessories (part 2).
Installer and user reference guide
8
·
General safety precautions
Compressor unit installation and operation manual
Fluorinated greenhouse gases label
Multilingual fluorinated greenhouse gases label
Screw (only needed in case 5 HP for shield of transmission
wiring) (see "6.9.4 To connect the electrical wiring on the
compressor unit" on page 30)
Cable tie
a
2
3.2.5
b
To remove the transportation EPS
Only for RKXYQ8.
Remove the EPS. The EPS protects the unit during transport.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
4 About the units and options
3.3.3
To remove the accessories from the heat
exchanger unit
a
1×
b
1×
1×
3.3
Heat exchanger unit
3.3.1
To unpack the heat exchanger unit
1
2
g
3.3.4
d
f
g
1×
e
a
b
c
d
e
f
c
1×
1×
3×
Optional filter for debris
Heat exchanger unit installation manual
Sealing pad
Drain hose
Metal clamp
Screw (for shield of transmission wiring) (see "6.9.5 To
connect the electrical wiring on the heat exchanger unit" on
page 31)
Cable tie
To remove the transportation sheet
Remove the sheet. The sheet protects the unit during transport.
3.3.2
4
About the units and options
4.1
Overview: About the units and
options
To handle the heat exchanger unit
NOTICE
When removing the heat exchanger unit from the pallet, do
NOT place the suction or discharge side of the unit on the
floor. Possible consequence: Deformation of the suction
or discharge opening.
This chapter contains information about:
CAUTION
▪ Where the compressor unit and heat exchanger unit fit in the
system layout.
To avoid injury, do NOT touch the air inlet or aluminum fins
of the unit.
▪ With which indoor units and options you can combine the
compressor unit and heat exchanger unit.
▪ Identification of the compressor unit and heat exchanger unit.
▪ With packing. Use a forklift or slings.
4.2
Identification
NOTICE
When installing or servicing several units at the same time,
make sure NOT to switch the service panels between
different models.
▪ Without packing. Carry the unit slowly as shown:
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
9
4 About the units and options
4.2.1
Identification label: Compressor unit
4.3
About the compressor unit and
heat exchanger unit
Location
This installation manual concerns the full inverter driven VRV IV heat
pump for indoor installation.
The compressor unit and heat exchanger unit are intended for indoor
installation and aimed for air to air heat pump applications.
5 HP
8 HP
Heating
16.0 kW
25.0 kW
Cooling
14.0 kW
22.4 kW
Specification
Maximum capacity
Outside ambient
design temperature
–20~15.5°C WB
–5~46°C DB
Ambient design temperature of
compressor unit and heat exchanger
unit
Model identification
Example: R K X Y Q 5 T7 Y1 B [*]
Explanation
Code
Heating
Cooling
Maximum relative
humidity around the
compressor unit and
heat exchanger unit
5~35°C DB
Heating
50%(a)
Cooling
80%(a)
R
Outdoor air cooled
K
Compressor unit
X
Heat pump (no continuous heating)
Y
Single module
Q
Refrigerant R410A
5+8
Capacity class
T7
VRV IV series
Y1
Power supply
NOTICE
B
European market
[*]
Minor model change indication
Design of the system must not be done at temperatures
below –15°C.
4.2.2
(a)
4.4
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.
System layout
INFORMATION
Identification label: Heat exchanger unit
Not all combinations of indoor units are allowed, for
guidance, see "4.5.2 Possible combinations of indoor
units" on page 11.
Location
1
a
c
c
VRV DX
b
1
2
a
b
c
d
VRV DX
EKEXV
AHU
Model identification
Example: R D X Y Q 5 T7 V1 B [*]
Code
Explanation
2
VRV DX
VRV DX
EKEXV
AHU
d
d
d
d
In case of VRV DX indoor units
In case of VRV DX indoor units combined with an air
handling unit
Heat exchanger unit
Compressor unit
Refrigerant piping
User interface (dedicated depending on indoor unit type)
VRV direct expansion (DX) indoor unit
Expansion valve kit
Air handling unit
R
Outdoor air cooled
D
Heat exchanger unit
X
Heat pump (no continuous heating)
Y
Single module
Q
Refrigerant R410A
5+8
Capacity class
NOTICE
T7
VRV IV series
V1
Power supply
B
European market
To be sure your system setup (compressor unit+heat
exchanger unit+indoor unit(s)) will work, you have to
consult the latest technical engineering data for the VRV IV
heat pump for indoor installation.
[*]
Minor model change indication
4.5
Combining units and options
4.5.1
About combining units and options
The VRV IV heat pump for indoor installation can be combined with
several types of indoor units and is intended for R410A use only.
For an overview which units are available you can consult the
product catalogue for the VRV IV heat pump for indoor installation.
Installer and user reference guide
10
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
4 About the units and options
An overview is given indicating the allowed combinations of indoor
units, compressor units and heat exchanger units. Not all
combinations are allowed. They are subject to rules mentioned in the
technical engineering data.
4.5.2
Possible combinations of indoor units
In general following type of indoor units can be connected to a VRV
IV heat pump for indoor installation. The list is non-exhaustive and is
depending on the combination of compressor unit, heat exchanger
unit and indoor unit models.
Description
5 HP
8 HP
Cool/heat selector cable
EKCHSC
—
Cool/heat selector PCB
—
BRP2A81(a)
With optional fixing box for the
switch
(a)
1
To install BRP2A81, proceed as follows:
Check the components of BRP2A81. You do NOT need all of
them.
a
b
1×
▪ VRV direct expansion (DX) indoor units (air to air applications).
KJB111A
c
1×
1×
X
X
1×
X
1×
1×
X
1×
▪ AHU (air-to-air applications): EKEXV-kit+EKEQM-box required,
depending on the application.
▪ Comfort air curtain (air-to-air applications): CYV (Biddle) series.
a
b
c
X
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
2
Remove the service covers of the compressor unit and the
switch box. See "6.2.2 To open the compressor unit" on
page 17.
3
Remove the mounting plate from the PCB.
Capacity CR
VRV DX only
Total: 50~130%
VRV DX + AHU
Total: 50~110%
Cable
Cable tie
PCB
Not needed
Allowable per indoor unit type:
▪ VRV DX: 50~110%
▪ AHU: 0~60%
AHU only
Total: 90~110%
FXMQ-MF only
Total: 50~100%
1
2
1
Other combinations than those mentioned above are not
allowed.
4.5.3
Possible options for the compressor unit
and heat exchanger unit
INFORMATION
Refer to the technical engineering data for the latest option
names.
4
Mount the PCB.
DS1
Refrigerant branching kit
Description
X1A
Model name
Refnet header
KHRQ22M29H
Refnet joint
KHRQ22M20T
A B C
A1P
X66A
X1M
KHRQ22M29T9
For the selection of the optimal branching kit, please refer to
"5.3.4 To select refrigerant branch kits" on page 15.
External control adaptor (DTA104A61/62)
To instruct specific operation with an external input coming from a
central control the external control adaptor can be used. Instructions
(group or individual) can be instructed for low noise operation and
power consumption limitation operation.
The external control adapter has to be installed in the indoor unit.
5
Connect the cable.
PC configurator cable (EKPCCAB)
You can 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 compressor unit.
The
user
interface
software
is
available
on
http://
www.daikineurope.com/support-and-manuals/software-downloads/.
DS1
X1A
Cool/heat selector
In order to control the cooling or heating operation from a central
location, the following option can be connected:
Description
Cool/heat selector switch
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
5 HP
A1P
X1M
X66A
8 HP
KRC19-26A
Installer and user reference guide
11
5 Preparation
6
Connect the cool/heat selector switch. Tightening torque X1M
(A/B/C): 0.53~0.63 N•m
A BC
Preparing installation site
Do NOT install the unit in places often used as work place. In case
of construction works (e.g. grinding works) where a lot of dust is
created, the unit must be covered.
X1A
A BC
5.2
X1M
Choose the installation location with sufficient place for carrying the
unit in and out of the site.
5.2.1
KRC19-26A
Installation site requirements of the
compressor unit
7
Fix the cables with cable ties.
INFORMATION
8
Turn ON the DIP switch (DS1‑1).
Also read the following requirements:
ON
OFF
DS1
▪ General installation site requirements.
"General safety precautions" chapter.
1234
See
the
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
CAUTION
A1P
9
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
X66A
These units (compressor unit, heat exchanger unit and
indoor units) are suitable for installation in a commercial
and light industrial environment.
Reattach the service covers. See "6.10.2 To close the
compressor unit" on page 32.
NOTICE
10 Perform a test run. See the "Commissioning" chapter.
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.
Drain pan heater (EKDPH1RDX)
▪ When. Installation is optional. It is recommended in areas where
the outside temperature is below –7°C for more than 24 hours
continuously.
NOTICE
▪ Where. Install the drain pan heater in the heat exchanger unit.
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.
▪ How. See the installation instructions delivered with the drain pan
heater.
Filter for debris (delivered as accessory)
▪ When. Installation is optional. It is recommended in places where
a lot of debris or dirt (example: leafs) can go into the suction
ducting.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
▪ Where. Install the filter in one of the following places:
▪ Suction opening of the heat exchanger unit
▪ Suction ducting (easier for maintenance)
c
c
b
b
c
b
▪ How. See the installation instructions attached to the filter.
▪ Pressure drop over the filter:
e
▪ 5 HP: 30 Pa at 60 m³/min
d
g
d
▪ 8 HP: 75 Pa at 100 m³/min
5
5.1
Preparation
Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
f
a
a
b
c
d
e
f
g
(mm)
Personal computer or radio
Fuse
Earth leakage protector
User interface
Indoor unit
Compressor unit
Heat exchanger unit
In places with weak reception, keep distances of 3 m or more to
avoid electromagnetic disturbance of other equipment and use
conduit tubes for power and transmission lines.
▪ Preparing the electrical wiring
Installer and user reference guide
12
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
5 Preparation
▪ Service space. Mind the following requirements:
(mm)
(mm)
≥10
▪ Service space. Mind the following requirements:
≥10
≥10
a
b
≥500
≥10
≥100
b
≥50
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
≥100
Top view
Front view
≥10
a
b
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
a
b
Do NOT install the unit in the following places:
▪ Sound sensitive areas (e.g. near a bedroom and the like), so that
the operation noise will cause no trouble.
Note: If the sound is measured under actual installation
conditions, the measured value might be higher than the sound
pressure level mentioned in Sound spectrum in the data book due
to environmental noise and sound reflections.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
5.2.2
Installation site requirements of the heat
exchanger unit
The heat exchanger unit has the same installation site requirements
as the compressor unit, and a few additional ones:
≥500
a
Air suction side
Air discharge side
▪ Protective guards. Make sure to install protective guards on the
suction and discharge side to prevent somebody from touching
the fan blades or heat exchanger.
▪ Air flow. Make sure nothing blocks the air flow.
▪ Drainage. Make sure condensation water can be evacuated
properly.
▪ Seaside installation. Do NOT install directly exposed to
seawinds. This is to prevent corrosion caused by high levels of
salt in the air, which might shorten the life of the unit.
a
b
c
d
e
▪ Heat exchanger fins are sharp and injury is possible. Choose an
installation location where there is no risk for injury (especially in
areas where children play).
X
O
a
b
c
d
e
5.2.3
Not allowed
Allowed
Building (top view)
Discharge ducting
Heat exchanger unit
Suction ducting
Seawinds
Securing safety against refrigerant leaks
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.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
13
5 Preparation
About the maximum concentration level
3
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.
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.
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).
Formula
F/G≤H
F
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
Total volume of refrigerant in the refrigerant
system
G
Size (m3) of smallest room in which there is
a unit installed
H
Maximum concentration level (kg/m3)
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.
4
a b
a
b
Direction of the refrigerant flow
Room where refrigerant leak has occurred (outflow of all
the refrigerant from the system)
Calculate the refrigerant density taking the volume of the room
where the unit is installed and the adjacent room. Install
ventilation openings in the door of adjacent rooms until the
refrigerant density is smaller than the maximum concentration
level.
5.3
Preparing refrigerant piping
5.3.1
Refrigerant piping requirements
Pay special attention to places, such as basements etc., where
refrigerant can stay, since refrigerant is heavier than air.
INFORMATION
To check the maximum concentration level
Also read the precautions and requirements in the
"General safety precautions" chapter.
Check the maximum concentration level in accordance with steps 1
to 4 below and take whatever action is necessary to comply.
NOTICE
1
2
The refrigerant R410A requires strict cautions for keeping
the system clean, dry and tight.
Calculate the amount of refrigerant (kg) charged to each system
separately.
Formula
A+B=C
A
Amount of refrigerant in a single unit system
(amount of refrigerant with which the system
is charged before leaving the factory)
B
Additional charging amount (amount of
refrigerant added locally)
C
Total amount of refrigerant (kg) in the
system
▪ 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
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.
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
Calculate the volume of the room (m3) where the 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
▪ Clean and dry: foreign materials (including mineral oils
or moisture) should be prevented from getting mixed
into the system.
Where there are no smaller room divisions:
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
5.3.2
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping temper grade and thickness:
Outer diameter
(Ø)
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.
6.4 mm (1/4")
Temper grade
Thickness (t)(a)
Annealed (O)
≥0.80 mm
15.9 mm (5/8")
Annealed (O)
≥0.99 mm
19.1 mm (3/4")
Half hard (1/2H)
≥0.80 mm
Ø
9.5 mm (3/8")
t
12.7 mm (1/2")
a
b
a
b
a Opening between the rooms
b Partition (Where there is an opening without a door
or where there are openings above and below the door
which are each equivalent in size to 0.15% or more of
the floor area.)
Installer and user reference guide
14
22.2 mm (7/8")
(a)
Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
5 Preparation
5.3.3
To select the piping size
If
Determine the proper size referring to following tables and reference
figure (only for indication).
C
c
a
D
A
D
VRV DX
EKEXV
B
b
D
c
Then
The equivalent pipe 5 HP It is recommended to increase the
length between the
size (size-up) of the main gas pipe
heat exchanger
(between compressor unit and first
unit and the
refrigerant branch kit). If the
furthest indoor unit
recommended gas pipe (size-up) is not
is 90 m or more
available, you must use the standard
size (which might result in a small
capacity decrease).
8 HP ▪ You must increase the size (size-up)
of the main liquid pipe (between
compressor unit and first refrigerant
branch kit).
D
AHU
VRV DX
a
b
c
VRV DX
EKEXV
AHU
A
B
C
D
Heat exchanger unit
Compressor unit
Refrigerant branch kit
VRV DX indoor unit
Expansion valve kit
Air handling unit
Piping between heat exchanger unit and compressor unit
Piping between compressor unit and (first) refrigerant
branch kit (= main pipe)
Piping between refrigerant branch kits
Piping between refrigerant branch kit and indoor unit
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the following
into account:
▪ Select the pipe size nearest to the required size.
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
▪ The additional refrigerant calculation has to be adjusted as
mentioned in "6.8.3 To determine the additional refrigerant
amount" on page 26.
A: Piping between heat exchanger unit and
compressor unit
C: Piping between refrigerant branch kits
Use the following diameters:
Indoor unit capacity
index
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
<150
15.9
9.5
150≤x<200
19.1
200≤x<260
22.2
D: Piping between refrigerant branch kit and
indoor unit
Use the same diameters as the connections (liquid, gas) on the
indoor units. The diameters of the indoor units are as follows:
Use the following diameters:
Compressor unit
capacity type
▪ It is recommended to increase the
size (size-up) of the main gas pipe
(between compressor unit and first
refrigerant branch kit). If the
recommended gas pipe (size-up) is
not available, you must use the
standard size (which might result in a
small capacity decrease).
Piping outer diameter size (mm)
Indoor unit capacity
index
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
15~50
12.7
6.4
5 HP
19.1
12.7
63~140
15.9
9.5
8 HP
22.2
200
19.1
250
22.2
B: Piping between compressor unit and first
refrigerant branch kit
5.3.4
Use the following diameters:
Compressor unit
capacity type
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
Standard
Size-up
Standard
Size-up
5 HP
15.9
19.1
9.5
—
8 HP
19.1
22.2
9.5
12.7
Standard ↔ Size-up:
To select refrigerant branch kits
For piping example, refer to "5.3.3 To select the piping size" on
page 15.
Refnet joint at first branch (counting from the compressor unit)
When using refnet joints at the first branch counted from the
compressor unit side, choose from the following table in accordance
with the capacity of the compressor unit. Example: Refnet joint c
(B→C/D).
Compressor unit capacity type
Refrigerant branch kit
5 HP
KHRQ22M20T
8 HP
KHRQ22M29T9
Refnet joints at other branches
For refnet joints other than the first branch, select the proper branch
kit model based on the total capacity index of all indoor units
connected after the refrigerant branch. Example: Refnet joint c
(C→D/D).
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
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Indoor unit capacity index
Refrigerant branch kit
<200
KHRQ22M20T
Installer and user reference guide
15
5 Preparation
Indoor unit capacity index
Refrigerant branch kit
200≤x<260
KHRQ22M29T9
3 EKEXV ↔ AHU
H4≤5 m
4 Indoor unit ↔ Indoor unit
H5≤15 m
(a)
Refnet headers
Concerning refnet headers, choose from the following table in
accordance with the total capacity of all the indoor units connected
below the refnet header.
Indoor unit capacity index
Refrigerant branch kit
<260
KHRQ22M29H
INFORMATION
Maximum 8 branches can be connected to a header.
Refrigerant piping length and height
difference
5.3.5
The piping lengths and height differences must comply with the
following requirements.
L5
c
a
L3
H1
L1
H2
b
L7
c
L6
L4
H4
H3
H5
Heat exchanger unit
Compressor unit
Refrigerant branch kit
VRV DX indoor unit
Expansion valve kit
Air handling unit
Height differences
Piping lengths
About electrical compliance
Only for RKXYQ8
This equipment complies with:
▪ 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.
3329 kVA
Safety device requirements
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
Power supply: Compressor unit
2 Actual piping length (equivalent L2+L3+L4≤70 m (90 m)
piping length)(a)
L2+L5+L6≤70 m (90 m)
L2+L5+L7≤70 m (90 m)
3 Total piping length (x=L1+L2+L3+L4+L5+L6+L7)
Minimum
10 m≤x
Maximum in case of
8 HP
x≤300 m
The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model
Minimum circuit
ampacity
Recommended
fuses
RKXYQ5
13.5 A
16 A
RKXYQ8
17.4 A
20 A
If
Then
L1≤30 m
x≤115 m
▪ Phase and frequency: 3N~ 50 Hz
L1≤25 m
x≤120 m
▪ Voltage: 380-415 V
L1≤20 m
x≤125 m
L1≤15 m
x≤130 m
L1≤10 m
x≤135 m
L1≤5 m
x≤140 m
4 EKEXV → AHU
L4≤5 m
5 First branch kit → Indoor unit/
AHU
L3+L4≤40 m
L5+L6≤40 m
L5+L7≤40 m
Power supply: Heat exchanger unit
The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model
Minimum circuit
ampacity
Recommended
fuses
RDXYQ5
4.6 A
10 A
RDXYQ8
7.0 A
10 A
(b)
Maximum height differences
1 Heat exchanger unit ↔
Compressor unit
H1≤10 m
2 Compressor unit ↔ Indoor unit H2≤30 m
H3≤30 m
Installer and user reference guide
16
Minimum Ssc value
RKXYQ8
NOTICE
L1≤30 m
Maximum in case of
5 HP
5.4.1
5.4.2
Minimum and maximum piping lengths
1 Heat exchanger unit →
Compressor unit
Preparing electrical wiring
Model
AHU
VRV DX
a
b
c
VRV DX
EKEXV
AHU
H1~H5
L1~L7
5.4
▪ 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.
VRV DX
EKEXV
L2
(b)
Assume equivalent piping length of refnet joint=0.5 m and
refnet header=1 m (for calculation purposes of equivalent
piping length, not for refrigerant charge calculations).
Either unit can be the highest unit.
▪ Phase and frequency: 1~ 50 Hz
▪ Voltage: 220-240 V
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6 Installation
Transmission wiring
6.2.2
To open the compressor unit
Transmission line section:
DANGER: RISK OF BURNING
Transmission wiring
Sheathed + shielded cable (2
wires)
DANGER: RISK OF ELECTROCUTION
Vinyl cords
0.75~1.25 mm²
1
Remove the service cover of the compressor unit.
5 HP
(using shielded cable for the
transmission wiring is mandatory
for 5 HP, and optional for 8 HP)
Maximum wiring length
8 HP
300 m
(= distance between compressor
unit and furthest indoor unit)
Total wiring length
600 m
(= distance between compressor
unit and all indoor units, and
between compressor unit and
heat exchanger unit)
If the total transmission wiring exceeds these limits, it may
result in communication error.
6
Installation
6.1
Overview: Installation
This chapter describes what you have to do and know on-site to
install the system.
5×
2
5×
If you want to make field settings, remove the inspection
cover.
5 HP
3
8 HP
If you want to connect electrical wiring, remove the switch box
cover.
Typical workflow
5 HP
Installation typically consists of the following stages:
8 HP
▪ Mounting the compressor unit.
▪ Mounting the heat exchanger unit (+ ducting + filter for debris +
drain pump + optional equipment).
▪ Mounting the indoor units.
▪ Connecting the refrigerant piping.
▪ Checking the refrigerant piping.
4×
▪ Charging refrigerant.
4×
▪ Connecting the electrical wiring.
▪ Finishing the compressor unit installation.
▪ Finishing the heat exchanger unit installation.
6.2.3
To open the switch box cover of the heat
exchanger unit
▪ Finishing the indoor installation.
DANGER: RISK OF ELECTROCUTION
INFORMATION
For installation of the indoor unit (mounting the indoor unit,
connecting the refrigerant piping to the indoor unit,
connecting the electrical wiring to the indoor unit …), see
the installation manual of the indoor unit.
6.2
Opening the units
6.2.1
About opening the units
At certain times, you have to open the unit. Example:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
2×
▪ When maintaining or servicing the unit
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
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Installer and user reference guide
17
6 Installation
6.3
Mounting the compressor unit
6.3.1
Precautions when mounting the
compressor unit
6.4.2
Guidelines when installing the heat
exchanger unit
INFORMATION
Optional equipment. When installing optional equipment,
also read the installation manual of the optional equipment.
Depending on the field conditions, it might be easier to
install the optional equipment first.
INFORMATION
Also read the precautions and requirements in the
following chapters:
Guidelines when installing the
compressor unit
6.3.2
Check the strength and level of the installation ground so that the
unit will not cause any operating vibration or noise. If the vibration
might be transmitted to the building, use a vibration-proof rubber
(field supply).
4×
255
▪ Preparation
▪ Suspension bolts. Use suspension bolts for installation. Check
whether the ceiling is strong enough to support the weight of the
unit. If there is a risk, reinforce the ceiling before installing the unit.
Attach the hanger bracket to the suspension bolt. Fix it securely
by using a nut and washer from the upper and lower sides of the
hanger bracket.
a1
b
c
705
▪ General safety precautions
You can install the compressor unit directly on the floor or on a
structure.
84
▪ On the floor. You do NOT have to fix the unit with anchor bolts.
b
a2
1497
▪ On a structure. Fix the unit securely with anchor bolts, nuts and
washers (field supply) to the structure. The foundation (steel beam
frame or concrete) must be larger than the grey marked area.
a1
a2
b
c
≥800 (8 HP)
≥640 (5 HP)
(mm)
Nut
Double nut
Washer
Hanger bracket
▪ Drain water flow. Make sure drain water flows to the drain pipe
connection.
A
B
A
a
6.4.3
600 (8 HP)
426 (5 HP)
a
a
(mm)
Minimum foundation
Anchor point (4×)
a
0~2°
a
0~2°
B
≥666
516
≤480
a
Drain pipe connection
Guidelines when installing the ducting
The ducting is to be field supplied.
▪ Slope. Make sure the ducting slopes down to prevent water from
flowing into the heat exchanger unit.
INFORMATION
20 mm
The recommended height of the upper protruding part of
the bolts is 20 mm.
a
b
a
b
a
Ducting
Heat exchanger unit
▪ Grills. Install grills in the suction ducting entrance and the
discharge ducting exit to prevent animals and debris from going
into the ducting.
6.4
Mounting the heat exchanger unit
▪ Service holes. Put service holes in the ducting to make
maintenance easier.
6.4.1
Precautions when mounting the heat
exchanger unit
▪ Thermal insulation. Insulate the ducting against thermal losses
to prevent sweat (during heating operation), and to prevent
overheating of the building (during cooling operation).
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ Sound insulation. Insulate the ducting against noise, especially
in sound-sensitive areas. Example: Sound-absorbing ducting;
sound-absorbing baffle in the ducting.
▪ General safety precautions
▪ Preparation
Installer and user reference guide
18
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6 Installation
▪ Air leaks. Wind aluminium tape around the connection between
the heat exchanger unit and the ducting. Make sure there are no
air leaks between the ducting and the heat exchanger unit, and at
any other connection. This to prevent sweat, overheating and
sound problems.
a b
c
b a
▪ Condensation. Take measures against condensation. Insulate
the complete drain piping in the building.
▪ Bad odours. To prevent bad odours and air going into the unit
through the drain piping, install a trap.
a
d
e
e
a
b
c
d
e
d
Screw (field supply)
Flange (field supply)
Heat exchanger unit
Insulation (field supply)
Aluminium tape (field supply)
a
▪ Combining drain pipes. You can combine drain pipes. Make
sure to use drain pipes and T-joints with a correct gauge for the
operating capacity of the units.
a
b
c
b
≥100 mm
▪ Airflow:
▪ Protect the ducting against reverse airflow from wind.
▪ Prevent discharged air from flowing back to the suction side.
Possible consequence: Decreased performance of the unit.
▪ Outside air. Connect the suction ducting and discharge ducting
with the outside air. If the suction ducting or discharge ducting is
connected with the inside air, it might be impossible to reach the
desired room temperature.
Trap
a
b
c
Heat exchanger unit
Indoor unit
T-joint
To connect the drain piping to the heat exchanger
unit
NOTICE
a
b
Incorrect connection of the drain hose might cause leaks,
and damage the installation space and surroundings.
c
d
O
X
a
b
c
d
Allowed
Not allowed
Building (top view)
Suction ducting
Heat exchanger unit
Discharge ducting
1
Push the drain hose as far as possible over the drain pipe
connection.
2
Tighten the metal clamp until the screw head is less than 4 mm
from the metal clamp part.
3
Wind the sealing pad (= insulation) around the metal clamp and
drain hose, and fix it with cable ties.
4
Connect the drain piping to the drain hose.
1
6.4.4
2+3+4
Guidelines when installing the drain
piping
A
Make sure condensation water can be evacuated properly. This
involves:
A'
▪ General guidelines
▪ Connecting the drain piping to the heat exchanger unit
a
b
c
d
▪ Installing a drain pump and drain reservoir
▪ Checking for water leaks
A-A'
General guidelines
▪ Pipe length. Keep drain piping as short as possible.
▪ Pipe size. Keep the pipe size equal to or greater than that of the
connecting pipe (vinyl pipe of 25 mm nominal diameter and
32 mm outer diameter).
▪ Slope. Make sure the drain piping slopes down (at least 1/100) to
prevent air from being trapped in the piping. Use hanging bars as
shown.
a
b
c
d
e
e
≤4 mm
d
c
b
a
Drain pipe connection (attached to the unit)
Drain hose (accessory)
Metal clamp (accessory)
Sealing pad (accessory)
Drain piping (field supply)
Guidelines when installing a drain pump and drain
reservoir
If you install a drain pump, you must also install a drain reservoir.
The drain pump and drain reservoir are to be field supplied.
1~1.5 m
a
O
X
a
Hanging bar
Allowed
Not allowed
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Installer and user reference guide
19
6 Installation
▪ Drain pump:
6.5.2
Precautions when connecting the
refrigerant piping
▪ Minimum flow rate: 45 l/h
▪ Feedback contact. You can connect a contact that gives the
status of the drain pump to the heat exchanger unit. The heat
pump uses this contact as an input.
1 X2M
INFORMATION
Also read the precautions and requirements in the
following chapters:
2 X2M
▪ General safety precautions
▪ Preparation
A1P
X2M
DANGER: RISK OF BURNING
a
b
X2M
X1M
NOTICE
Take the following precautions on refrigerant piping into
account:
X2M
c
▪ Avoid anything but the designated refrigerant to get
mixed into the refrigerant cycle (e.g. air).
d
▪ Only use R410A when adding refrigerant.
a
b
c
d
Feedback contact from the drain pump
Cable tie
Drain pump malfunction: If the contact opens, the heat
pump stops operating and gives an error. For more
information, see "11.3.1 Error codes: Overview" on
page 46.
Drain pump normal operation: If the contact closes, the
heat pump resumes normal operation.
▪ Only use installation tools (e.g. manifold gauge set) that
are exclusively used for R410A installations to
withstand the pressure and to prevent foreign materials
(e.g. mineral oils and moisture) from mixing into the
system.
▪ Protect the piping by pinching or taping the pipe ends
to prevent dirt, liquid or dust from entering the piping.
▪ Drain reservoir:
▪ Use caution when passing copper tubes through walls.
▪ Minimum volume: 3 l
▪ Best practice: Use a drain reservoir with a float switch that
gives an ON/OFF signal to the drain pump.
6.5.3
Pipe bending guidelines
To check for water leaks
Use a pipe bender for bending. All pipe bends should be as gentle
as possible (bending radius should be 30~40 mm or larger).
Gradually put approximately 1 l of water in the drain pan, and check
for water leaks.
6.5.4
6.5
Connecting the refrigerant piping
6.5.1
About connecting the refrigerant piping
To braze the pipe end
NOTICE
Precautions when connecting field piping. Add brazing
material as shown in the figure.
≤Ø25.4
Before connecting the refrigerant piping
1
Make sure the compressor unit, heat exchanger unit and indoor units
are mounted.
Typical workflow
Connecting the refrigerant piping involves:
1
▪ Connecting the refrigerant piping to the compressor unit
▪ Connecting the refrigerant piping to the heat exchanger unit
▪ Connecting refrigerant branch kits
▪ Connecting the refrigerant piping to the indoor units (see the
installation manual of the indoor units)
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
▪ 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
▪ Pipe bending
▪ Brazing
f
▪ Using the stop valves
▪ Removing pinched pipes
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.
Installer and user reference guide
20
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6 Installation
▪ 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.
6.5.5
Using the stop valve and service port
To handle the stop valve
▪ Make sure to keep all stop valves open during operation.
▪ The figure below shows the name of each part required in
handling the stop valve.
NOTICE
Pay attention that mentioned torque range is applicable for
opening Ø19.1 mm stop valves only.
To close the stop valve
1
Remove the stop valve cover.
2
Insert a hexagon wrench into the stop valve and turn the stop
valve clockwise.
3
When the stop valve cannot be turned any further, stop turning.
Result: The valve is now closed.
Closing direction:
▪ The stop valve is factory closed.
a
b
a
b
c
d
a
e
d
c
To handle the stop valve cover
d
▪ The stop valve cover is sealed where indicated by the arrow. Take
care not to damage it.
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
b
▪ Check for refrigerant leaks after tightening the stop valve cover.
c
a
b
c
d
e
▪ After handling the stop valve, make sure to tighten the stop valve
cover securely. For the tightening torque, refer to the table below.
To handle the service port
Service port
Stop valve cover
Hexagon hole
Shaft
Seal
To open the stop valve
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
▪ After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
1
Remove the stop valve cover.
▪ Check for refrigerant leaks after tightening the service port cover.
2
Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
Tightening torques
3
When the stop valve cannot be turned any further, stop turning.
Result: The valve is now open.
Stop valve
size (mm)
Tightening torque N•m (turn clockwise to close)
Shaft
Valve body Hexagonal
wrench
To fully open the Ø19.1 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.
Ø9.5
5.4~6.6
Ø12.7
8.1~9.9
Ø19.1
27.0~33.0
6.5.6
4 mm
Cap (valve
lid)
Service
port
13.5~16.5
11.5~13.9
18.0~22.0
8 mm
22.5~27.5
To remove the pinched pipes
WARNING
2
1
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.
3
4
Use the following procedure to remove the pinched piping:
1
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Remove the valve cover and make sure that the stop valves are
fully closed.
Installer and user reference guide
21
6 Installation
WARNING
a
b
c
d
Never remove the pinched piping by brazing.
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
a
b
c
d
2
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
You have to recover gas and oil from all 4 pinched pipes. Depending
on your available tools, use method 1 (manifold with refrigerant line
splitters required) or method 2.
Manifold
p<
p>
Connections
A
Method 1:
B
Connect to all service
ports at once.
e
A
D
B
D
C
C
C
C
C
c
c
d
Then connect to the
last 2 service ports.
A
B
a, b, c, d
e
A, B, C
D
3
C
C
▪ 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.
a
b
a
b
To connect the refrigerant piping to the
compressor unit
NOTICE
5 HP
b
a
1
Remove the service cover. See "6.2.2 To open the compressor
unit" on page 17.
2
Choose a piping route (a or b).
d
RDXYQ
First connect to the
first 2 service ports.
C
Wait until all oil is dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
6.5.7
Compressor unit
Method 2:
A
B
6
b
b
8 HP
a
c
d
RDXYQ
a
c
d
Service ports of stop valves
Vacuuming/recovery unit
Valves A, B and C
Refrigerant line splitter
Recover gas and oil from the pinched piping by using a
recovery unit.
a
a
b
3
If you have chosen the piping route to the top:
CAUTION
a b c d
Do not vent gases into the atmosphere.
4
When all gas and oil is recovered from the pinched piping,
disconnect the charge hose and close the service ports.
5
Cut off the lower part of the gas and liquid stop valve pipes
along the black line. Use an appropriate tool (e.g. a pipe cutter,
a pair of nippers).
a
b
c
d
Installer and user reference guide
22
To the back
To the top
Cut the insulation (under the knockout hole).
Hit on the knockout hole, and remove it.
Remove the burrs.
Paint the edges and areas around the edges using repair
paint to prevent rusting.
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6 Installation
NOTICE
NOTICE
Precautions when making knockout holes:
Only for 8 HP.
Piping adapter (Ø19.1→22.2 mm) (delivered as
accessory in the compressor unit). Use the piping adapter
to connect the field piping (Ø22.2 mm) to the gas piping
connection of the heat exchanger unit (Ø19.1 mm).
▪ Avoid damaging the casing.
▪ After making the knockout holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
4
5
Remove the wet cloth.
6
Put back the 2 insulation pieces, peel off the insulation tapes
and adhere them to the insulation pieces.
7
Reattach the cover.
Connect piping (by brazing) as follows:
5 HP
8 HP
d
c
d
c
b
a
a
b
3 1
1 2
2 3
1
a
b
c
d
1
2
3
Liquid line (circuit 1: to heat exchanger unit)
Gas line (circuit 1: to heat exchanger unit)
Liquid line (circuit 2: to indoor units)
Gas line (circuit 2: to indoor units)
Pinched piping
Piping accessory
Field piping
2
5
5
Reattach the service cover.
6
Seal all gaps (example: a) to prevent small animals from
entering the system.
3
4
6
6.5.9
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.
a
a
b
a
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.
To connect the refrigerant piping to the
heat exchanger unit
1
Remove the cover.
2
Remove the 2 insulation pieces.
3
Put a wet cloth in front of the EPS to protect the drain pan.
4
Braze the liquid and gas piping.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
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±30°
WARNING
6.5.8
c
a
A
a
a
B
a
b
c
Horizontal surface
Refnet joint mounted vertically
Refnet joint mounted horizontally
Installer and user reference guide
23
6 Installation
6.6
6.6.1
Checking the refrigerant piping
NOTICE
About checking the refrigerant piping
Make sure that all (field supplied) field piping valves are
OPEN (not compressor unit stop valves!) before you start
leak test and vacuuming.
Refrigerant piping works are
finished?
No
Finish piping work.
Checking refrigerant piping: General
guidelines
6.6.2
Yes
The indoor units, compressor
unit and/or heat exchanger
unit were already powered
ON?
For more information on the state of the valves, refer to
"6.6.3 Checking refrigerant piping: Setup" on page 24.
No
Use procedure:
"Method 1: Before power ON
(regular method)".
Connect the vacuum pump through a manifold to the service port of
all stop valves to increase efficiency (refer to "6.6.3 Checking
refrigerant piping: Setup" on page 24).
NOTICE
Yes
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).
Use procedure:
"Method 2: After power ON".
NOTICE
Make sure the pump oil does not flow oppositely into the
system while the pump is not working.
It is very important that all refrigerant piping work is done before the
units (compressor unit, heat exchanger unit or indoor units) 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, heat exchanger unit and indoor units is impossible when this
happens.
Therefore, there will be explained 2 methods for initial installation,
leak test and vacuum drying.
NOTICE
Do not purge the air with refrigerants. Use a vacuum pump
to evacuate the installation.
6.6.3
Checking refrigerant piping: Setup
The system contains 2 refrigerant circuits:
▪ Circuit 1: Compressor unit → Heat exchanger unit
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.
▪ Circuit 2: Compressor unit → Indoor units
You have to check both circuits (leak test, vacuuming drying). How
to check depends on your available tools:
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 34). 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.
If you have a
manifold…
Then
With refrigerant line
splitters
You can check both circuits at once. To do
so, connect the manifold via the splitters to
both circuits, and check.
NOTICE
Without refrigerant
line splitters
You have to check the circuits separately. To
do so:
Make sure that the heat exchanger unit and all indoor units
connected to the compressor unit are powered on.
(takes twice as long)
▪ First connect the manifold to circuit 1,
and check.
▪ Then connect the manifold to circuit 2,
and check.
NOTICE
Wait until the compressor unit has finished the initialisation
to apply setting [2‑21].
Possible connections:
Leak test and vacuum drying
Manifold
Checking the refrigerant piping involves:
p<
Connections
p>
▪ Checking for any leakages in the refrigerant piping.
▪ Performing vacuum drying to remove all moisture, air or nitrogen
in the refrigerant piping.
If there is a possibility of moisture being present in the refrigerant
piping (for example, water may have entered the piping), first carry
out the vacuum drying procedure below until all moisture has been
removed.
All piping inside the unit has been factory tested for leaks.
Only field installed refrigerant piping needs to be checked.
Therefore, make sure that all the compressor unit stop valves are
firmly closed before performing leak test or vacuum drying.
A
B
a
N2
b
d
R410A
c
A
D
B
D
e
24
C
C
C
C
f
5 HP
g
g
h
f
i
h
i
Only circuit 1
A
B
C
C
h
i
Only circuit 2
A
B
Installer and user reference guide
Compressor unit
Circuit 1 and 2
together
C
C
RDXYQ
g
8 HP
f
h
g
f
i
RDXYQ
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
6 Installation
a
b
c
d
e
f
g
h
i
A, B, C
D
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve (circuit 2: to indoor units)
Gas line stop valve (circuit 2: to indoor units)
Gas line stop valve (circuit 1: to heat exchanger unit)
Liquid line stop valve (circuit 1: to heat exchanger unit)
Valves A, B and C
Refrigerant line splitter
Valve
Open
Liquid line and gas line stop
valves (f, g, h, i)
Close
NOTICE
The connections to the indoor units and to the heat
exchanger unit, and all indoor units and the heat
exchanger unit itself should also be leak and vacuum
tested. Keep any possible (field supplied) field piping
valves open as well.
Refer to the indoor unit installation manual for more details.
Leak test and vacuum drying should be done before the
power supply is set to the unit. If not, see also the flow
chart earlier described in this chapter (see "6.6.1 About
checking the refrigerant piping" on page 24).
The connections to the indoor units and to the heat
exchanger unit, and all indoor units and the heat
exchanger unit itself should also be leak and vacuum
tested. Keep, if existing, all (field supplied) field valves to
the indoor units and to the heat exchanger unit open as
well.
Leak test and vacuum drying should be done before the
power supply is set to the unit. If not, see "6.6.1 About
checking the refrigerant piping" on page 24 for more
information.
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
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
compressor unit stop valves, or keep them closed. See
"6.8.4 To charge refrigerant" on page 26 for more information.
To perform a leak test
The leak test must satisfy the specifications of EN378‑2.
To check for leaks: Vacuum leak test
1
Evacuate the system from the liquid and gas piping to
–⁠100.7 kPa (–⁠1.007 bar/5 Torr) 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
2
3
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).
Test for leaks by applying a bubble test solution to all piping
connections.
Discharge all nitrogen gas.
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).
To perform vacuum drying
NOTICE
State of valve
Valves A, B and C
6.6.4
6.6.5
INFORMATION
After opening the stop valve, it is possible that the pressure
in the refrigerant piping does NOT increase. This might be
caused by e.g. the closed state of the expansion valve in
the compressor unit circuit, but does NOT present any
problem for correct operation of the unit.
6.7
To insulate the refrigerant piping
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
▪ Make sure to insulate the connection piping and refrigerant branch
kits entirely.
▪ Be sure to insulate the liquid and gas piping (for all units).
▪ Use heat resistant polyethylene foam which can withstand a
temperature of 70°C for liquid piping and polyethylene foam which
can withstand a temperature of 120°C for gas piping.
▪ 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.
▪ If there is a possibility that condensation on the stop valve might
drip down into the indoor unit or into the heat exchanger unit
through gaps in the insulation and piping because the compressor
unit is located higher than the indoor unit or higher than the heat
exchanger unit, this must be prevented by sealing up the
connections. See below figure.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
25
6 Installation
NOTICE
If operation is performed within 12 minutes after the
compressor unit, heat exchanger unit and indoor units are
turned on, the compressor will not operate before the
communication is established in a correct way between the
compressor unit, heat exchanger unit and indoor units.
b
a
NOTICE
Before starting charging procedures:
a
b
▪ In case of 5 HP: Check if the 7‑LEDs display is as
normal (see "7.2.4 To access mode 1 or 2" on
page 34), and there is no malfunction code on the
user interface of the indoor unit. If a malfunction code is
present, see "11.3 Solving problems based on error
codes" on page 46.
Insulation material
Caulking etc.
6.8
Charging refrigerant
6.8.1
About charging refrigerant
▪ In case of 8 HP: Check if the 7‑segment display
indication of the compressor unit A1P PCB is as normal
(see "7.2.4 To access mode 1 or 2" on page 34). If a
malfunction code is present, see "11.3 Solving
problems based on error codes" on page 46.
The compressor unit is factory charged with refrigerant, but
depending on the field piping you have to charge additional
refrigerant.
NOTICE
Before charging refrigerant
Make sure all connected units (heat exchanger unit +
indoor units) are recognised (setting [1‑5]).
Make sure the compressor unit's external refrigerant piping is
checked (leak test, vacuum drying).
Typical workflow
Charging additional refrigerant typically consists of the following
stages:
1
2
Determining how much you have to charge additionally.
Charging additional refrigerant (pre-charging and/or manual
charging).
3
Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the compressor unit.
6.8.2
Precautions when charging refrigerant
6.8.3
To determine the additional refrigerant
amount
Additional refrigerant to be charged=R (kg). R should be rounded off
in units of 0.1 kg.
R=[(X1×Ø12.7)×0.12+(X2×Ø9.5)×0.059+(X3×Ø6.4)×0.022]×A+B
X1...3=Total length (m) of liquid piping size at Øa
Parameter A and B:
Model
Parameter A
Parameter B
RKXYQ5
0.8
3.1 kg
INFORMATION
RKXYQ8
1.0
2.6 kg
Also read the precautions and requirements in the
following chapters:
Metric piping. 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.
▪ General safety precautions
▪ Preparation
WARNING
Inch piping
Size (Ø) (mm)
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
▪ 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.
Metric piping
6.8.4
To charge refrigerant
Charging refrigerant consists of 2 stages:
Stage
NOTICE
If the power of some units is turned off, the charging
procedure cannot be finished properly.
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.
Description
Stage 1: Pre-charging Recommended in case of larger systems.
Can be skipped, but charging will take longer
then.
Stage 2: Manual
charging
Only necessary if the determined additional
refrigerant amount is not reached yet by
pre-charging.
Stage 1: Pre-charging
Summary – Pre-charging:
Installer and user reference guide
26
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
6 Installation
Refrigerant bottle
Connected to the service ports of the stop
valves. Which stop valves to use depends
on the circuits you choose to pre-charge to:
▪ Circuits 1 and 2 together (manifold with
refrigerant line splitters required).
Stage 2: Manual charging
(= charging in the "Manual additional refrigerant charge" mode)
Summary – Manual charging:
Refrigerant bottle
▪ First circuit 1, then circuit 2 (or vice versa).
Connected to the service port for refrigerant
charge.
This charges to both circuits, and to the
compressor unit's internal refrigerant piping.
▪ Only circuit 1
▪ Only circuit 2
Stop valves
Open
Stop valves
Closed
Compressor
Operates
Compressor
Does NOT operate
1
5
Connect as shown. Make sure valve A is closed.
Connect as shown (choose one of the possible connections).
Make sure that all compressor unit stop valves, as well as valve
A are closed.
d
p<
A
Possible connections:
Manifold
p<
p>
A
B
a
d
N2
R410A
b
c
Connections
Compressor unit
Circuit 1 and 2
together
5 HP
g
A
D
B
D
e
C
C
C
C
f
b
R410A
a
g
h
f
i
h
A
B
C
C
h
i
Only circuit 2
i
A
B
C
C
RDXYQ
g
RDXYQ
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Refrigerant charge port
Valve A
NOTICE
8 HP
f
c
a
b
c
d
A
Only circuit 1
a
b
c
d
e
f
g
h
i
A, B, C
D
p>
h
g
f
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.
i
RDXYQ
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve (circuit 2: to indoor units)
Gas line stop valve (circuit 2: to indoor units)
Gas line stop valve (circuit 1: to heat exchanger unit)
Liquid line stop valve (circuit 1: to heat exchanger unit)
Valves A, B and C
Refrigerant line splitter
6
Open all compressor unit stop valves. At this point, valve A
must remain closed!
7
Take all the precautions mentioned in "7 Configuration" on
page 32 and "8 Commissioning" on page 42 into account.
8
Turn on the power of the indoor units, compressor unit and heat
exchanger unit.
9
Activate setting [2‑20] to start the manual additional refrigerant
charge mode. For details, see "7.2.8 Mode 2: Field settings" on
page 37.
Result: The unit will start operation.
2
Open valves C (on line of B) and B.
INFORMATION
3
Pre‑charge refrigerant until the determined additional refrigerant
amount is reached or pre‑charging is not possible anymore, and
then close valves C and B.
4
Do one of the following:
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.
If
Then
The determined additional
Disconnect the manifold from
refrigerant amount is reached the liquid line(s).
You do not have to perform the
"Stage 2" instructions.
Too much refrigerant is
charged
Recover refrigerant until the
determined additional
refrigerant is reached.
Disconnect the manifold from
the liquid line(s).
The determined additional
refrigerant amount is not
reached yet
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
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 "6.8.5 Error
codes when charging refrigerant" on page 28 and
solve the malfunction accordingly. Resetting the
malfunction can be done by pushing BS3. You can
restart the "Charging" instructions.
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
You do not have to perform the
"Stage 2" instructions.
10 Open valve A.
Disconnect the manifold from
the liquid line(s).
11 Charge refrigerant until the remaining determined additional
refrigerant amount is added, and then close valve A.
Continue with the "Stage 2"
instructions.
12 Press BS3 to stop the manual additional refrigerant charge
mode.
Installer and user reference guide
27
6 Installation
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
6.9
Connecting the electrical wiring
6.9.1
About connecting the electrical wiring
Operating with the stop valves closed will damage the
compressor.
Typical workflow
NOTICE
Connecting the electrical wiring typically consists of the following
stages:
After adding the refrigerant, do not forget to close the lid of
the refrigerant charging port. The tightening torque for the
lid is 11.5 to 13.9 N•m.
6.8.5
Error codes when charging refrigerant
INFORMATION
1
Making sure the power supply system complies with the
electrical specifications of the units.
2
3
4
5
Connecting the electrical wiring to the compressor unit.
Connecting the electrical wiring to the heat exchanger unit.
Connecting the electrical wiring to the indoor units.
Connecting the main power supply.
Field wiring: Overview
If a malfunction occurs:
▪ In case of 5 HP: The error code is displayed on the
user interface of the indoor unit.
Field wiring consists of:
▪ In case of 8 HP: The error code is displayed on the
compressor unit's 7‑segments display and on the user
interface of the indoor unit.
▪ Communication (= transmission) wiring between the compressor
unit, the heat exchanger unit, and the indoor units.
If a malfunction occurs, close valve A immediately. Confirm the
malfunction code and take corresponding action, "11.3 Solving
problems based on error codes" on page 46.
▪ Power supply (always including earth)
Example:
a
6.8.6
1
To fix the fluorinated greenhouse gases
label
Fill in the label as follows:
RXXX
GWP: XXX
2
1
kg
b
2 =
kg
c
1 + 2 =
1000
a
b
c
d
e
f
=
b
c
e
a
1 =
GWP × kg
220-240 V
1~ 50 Hz
d
Contains fluorinated greenhouse gases
f
220-240 V
1~ 50 Hz
380-415 V
3N~ 50 Hz
kg
d
tCO2eq
e
If a multilingual fluorinated greenhouse gases label is
delivered with the unit (see accessories), peel off the
applicable language and stick it on top of a.
Factory refrigerant charge: see unit name plate
Additional refrigerant amount charged
Total refrigerant charge
Greenhouse gas emissions of the total refrigerant charge
expressed as tonnes CO2-equivalent
GWP = Global warming potential
F1/F2
(16 V)
F1/F2
(16 V)
a
b
c
F1/F2
d
e
f
g
f
g
Main switch
Earth connection
Power supply wiring (including earth) (sheathed cable)
Transmission wiring (sheathed + shielded cable) (using
shielded cable for the transmission wiring is mandatory for
5 HP, and optional for 8 HP)
Compressor unit
Heat exchanger unit
Indoor unit
User interface
Power supply wiring and transmission wiring
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO2-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2
Fix the label on the inside of the compressor unit. There is a
dedicated place for it on the wiring diagram label.
It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wiring should always be at
least 50 mm.
NOTICE
▪ Be sure to keep the power line and transmission line
apart from each other. Transmission wiring and power
supply wiring may cross, but may not run parallel.
▪ Transmission wiring and power supply wiring may not
touch internal piping in order to avoid wire damage due
to high temperature piping.
▪ Firmly close the lid and arrange the electrical wires so
as to prevent the lid or other parts from coming loose.
The transmission wiring outside the unit should be wrapped and
routed together with the field piping.
Branches
Maximum number of branches
for unit-to-unit cabling
Installer and user reference guide
28
16
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
6 Installation
Transmission wiring
Sheathed + shielded cable (2
wires)
Vinyl cords
(using shielded cable for the
transmission wiring is mandatory
for 5 HP, and optional for 8 HP)
300 m
(= distance between compressor
unit and furthest indoor unit)
Total wiring length
▪ 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.
600 m
(= distance between compressor
unit and all indoor units, and
between compressor unit and
heat exchanger unit)
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
If the total transmission wiring exceeds these limits, it may
result in communication error.
No branching is allowed after branching.
B
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
0.75~1.25 mm²
Maximum wiring length
WARNING
▪ 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.
A
b1
b2
c1
▪ 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.
WARNING
b3
c2
C
A
B
C
D
a
b1, b2, b3
c1, c2
6.9.2
D
a
Central user interface (etc...)
Compressor unit
Indoor unit
Heat exchanger unit
Main line. The main line is the line to which the
transmission wiring of the heat exchanger unit is
connected.
Branch lines
No branch is allowed after branch
Precautions when connecting electrical
wiring
DANGER: RISK OF ELECTROCUTION
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.
▪ 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.
NOTICE
If the power supply has a missing or wrong N-phase,
equipment will break down.
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.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
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Installer and user reference guide
29
6 Installation
6.9.3
5 HP
RKXYQ5
RDXYQ5
X2M
X2M
TO IN/D TO OUT/D
Guidelines when connecting the electrical
wiring
Keep the following in mind:
F1 F2
▪ If stranded conductor wires are being used, install a round crimpstyle terminal on the tip. Place the round crimp-style terminal on
the wire up to the covered part and fasten the terminal with the
appropriate tool.
b
Stranded conductor wire
Round crimp-style terminal
Wire type
Installation method
cb
TO OUT/D
AA´
A´
F1 F2
a2
a
b
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
Sheathed + shielded cable (2 wires) (no polarity)
Connection of shield to earth
Terminal board (field supply)
Shielded cable. Using shielded cable for the transmission
wiring is mandatory for 5 HP, and optional for 8 HP.
c
5 HP
a
RKXYQ5
F1 F2 X2M
8 HP
RDXYQ5
X2M
c Flat washer
cb
a
B
a2
a1
bc
B
When using shielded cable:
a
▪ In case of 5 HP (a1 and a2): Connect the shield to the
earth of the compressor unit and the heat exchanger
unit.
b Screw
▪ In case of 8 HP (only a2): Connect the shield only to
the earth of the heat exchanger unit.
c Flat washer
3
Tightening torques
Wiring
Screw size
Tightening torque
(N•m)
Power supply wiring
M5
2.0~3.0
M3.5
0.8~0.97
Connect the power supply as follows:
3N~ 50 Hz
380-415 V
L1 L2 L3
a
b
(power supply +
shielded ground)
c
L1 L2 L3 N
To connect the electrical wiring on the
compressor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located on the switch box cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
2
Remove the service covers of the compressor unit and the
switch box. See "6.2.2 To open the compressor unit" on
page 17.
a
b
c
4
X1M
Earth leakage circuit breaker
Fuse
Power supply cable
Route the wiring through the frame, and fix the cables (power
supply and transmission wiring) with cable ties.
INFORMATION
To make routing the wiring easier, you can turn the switch
box horizontally by loosening the screw on the left side of
the switch box.
1×
Connect the transmission wiring as follows:
Installer and user reference guide
30
a2
a1, a2 Earth (use the screw delivered as accessory)
a Terminal
1
RDXYQ8
X2M
X1M
b Screw
6.9.4
F1 F2
F1F2
a Curled single core wire
RKXYQ8
X1M (A1P)
F1F2
a
Transmission wiring
X2M
WARNING
A
Stranded conductor
wire with round
crimp-style terminal
RDXYQ8
F1 F2
a
a1, a2
b
▪ Use the following methods for installing wires:
Single core wire
a2
b
a
a
b
a1
TO IN/D
F1 F2
F1 F2
a
8 HP
RKXYQ8
X1M (A1P)
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
6 Installation
5 HP
5 HP
RKXYQ5
RDXYQ5
X2M
X2M
TO IN/D TO OUT/D
F1 F2
a
≥50 mm
c
b
A1P
L1 L2 L3
a
a2
X1M
N
X2M
TO OUT/D
RDXYQ8
X2M
F1 F2
a2
a
b
b
F1 F2
X1M
a1
TO IN/D
F1 F2
F1 F2
a
8 HP
RKXYQ8
X1M (A1P)
b
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
X2M
b c
a
a1, a2
b
a c
8 HP
Sheathed + shielded cable (2 wires) (no polarity)
Connection of shield to earth
Terminal board (field supply)
WARNING
Shielded cable. Using shielded cable for the transmission
wiring is mandatory for 5 HP, and optional for 8 HP.
5 HP
X1M
b
(A1P
a
)
A1P
X1M
b
a2
a1
a2
a1, a2 Earth (use the screw delivered as accessory)
X1M
When using shielded cable:
▪ In case of 5 HP (a1 and a2): Connect the shield to the
earth of the compressor unit and the heat exchanger
unit.
b c
▪ In case of 8 HP (only a2): Connect the shield only to
the earth of the heat exchanger unit.
a c
Transmission wiring
Power supply
Cable tie
5
Reattach the service covers. See "6.10.2 To close the
compressor unit" on page 32.
6
Connect an earth leakage circuit breaker and fuse to the power
supply line.
6.9.5
F1 F2
RDXYQ8
X2M
X1M
X1M
c
a
b
c
RKXYQ8
X1M (A1P)
F1F2
a
RDXYQ5
X2M
F1F2
RKXYQ5
F1 F2 X2M
≥50 mm
8 HP
3
Connect the power supply as follows:
1~ 50 Hz
220-240 V
a
b
c
To connect the electrical wiring on the
heat exchanger unit
X1M
a
b
c
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located at the inside of the service cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
1
Remove the service cover. See "6.2.3 To open the switch box
cover of the heat exchanger unit" on page 17.
2
Connect the transmission wiring as follows:
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
4
Earth leakage circuit breaker
Fuse
Power supply cable
Route the wiring through the frame, and fix the cables (power
supply and transmission wiring) with cable ties.
Installer and user reference guide
31
7 Configuration
1
2
A1P
X2M
c
a
4×
b
c
X1M
5×
6.11
Finishing the heat exchanger unit
installation
6.11.1
To close the heat exchanger unit
NOTICE
a
b
c
When closing the cover, make sure that the tightening
torque does NOT exceed 4.1 N•m.
Transmission wiring
Power supply
Cable tie
6.10
Finishing the compressor unit
installation
6.10.1
To finish the transmission wiring
After installing the transmission wires inside the unit, wrap them
along with the on-site refrigerant pipes using finishing tape, as
shown in figure below.
a
c
b
e
d
2×
a
b
c
d
e
6.10.2
Liquid pipe
Gas pipe
Insulator
Transmission wiring (F1/F2)
Finishing tape
To close the compressor unit
7
Configuration
7.1
Overview: Configuration
This chapter describes what you have to do and know to configure
the system after it is installed.
It contains information about:
▪ Making field settings
NOTICE
▪ Energy saving and optimum operation
When closing the cover, make sure that the tightening
torque does NOT exceed 4.1 N•m.
INFORMATION
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
DANGER: RISK OF ELECTROCUTION
7.2
Making field settings
7.2.1
About making field settings
To configure the heat pump system, you must give input to the
compressor unit's main PCB (A1P). This involves the following field
setting components:
Installer and user reference guide
32
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
7 Configuration
8 HP
5 HP
▪ Push buttons to give input to the PCB
▪ A display to read feedback from the PCB
▪ DIP switches (only change the factory settings if you install a cool/
heat selector switch).
Field settings are defined by their mode, setting and value. Example:
[2‑8]=4.
A1P
A1P
MODE
TEST/
HWL
IND
H1P
H2P
H3P
MASTER SLAVE L.N.O.P. DEMAND
H4P
H5P
H6P
MULTI
H7P
H8P
PC configurator
You can also make 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.
BS1
BS2
BS3
BS4
BS5
MODE
SET
RETURN
TEST
RESET
ON
OFF
See also: "7.2.9 To connect the PC configurator to the compressor
unit" on page 40.
Mode 1 and 2
Description
Mode
Mode 1
(monitoring
settings)
Mode 2
(field settings)
Mode 1 can be used to monitor the current
situation of the compressor unit. Some field
setting contents can be monitored as well.
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.
In general, normal operation can be resumed
without special intervention after changing field
settings.
To access the field setting components
See "6.2.2 To open the compressor unit" on page 17.
7.2.3
Field setting components
ON (
) OFF ( ) Flashing (
ON (
) OFF (
ON
OFF
DS1
ON
OFF
1234
1234
DS1
DS2
)
) Flashing (
)
DIP switches
Only change the factory settings if you install a cool/heat selector
switch.
Model
5 HP
DIP switch
▪ DS1‑1: COOL/HEAT selector (refer to the
manual of the cool/heat selector switch).
OFF=not installed=factory setting
▪ DS1‑2: NOT USED. DO NOT CHANGE THE
FACTORY SETTING.
8 HP
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.
7.2.2
12
BS1 BS2 BS3
▪ DS1‑1:
COOL/HEAT
selector
(see
"4.5.3 Possible options for the compressor unit
and heat exchanger unit" on page 11). OFF=not
installed=factory setting
▪ DS1‑2~4: NOT USED. DO NOT CHANGE THE
FACTORY SETTING.
▪ DS2‑1~4: NOT USED. DO NOT CHANGE THE
FACTORY SETTING.
Push buttons
Use the push buttons to make the field settings. Operate the push
buttons with an insulated stick (such as a closed ball-point pen) to
avoid touching of live parts.
The components to make field settings differ depending on the
model.
Model
5 HP
Field setting components
▪ Push buttons (BS1~BS5)
Model
▪ 7‑LEDs display (H1P~H7P)
8 HP
The push buttons differ depending on the model.
5 HP
Push buttons
▪ BS1: MODE: For changing the set mode
▪ H8P: LED for indication during initialisation
▪ BS2: SET: For field setting
▪ DIP switches (DS1)
▪ BS3: RETURN: For field setting
▪ Push buttons (BS1~BS3)
▪ 7‑segments display (
▪ BS4: TEST: For test operation
)
▪ BS5: RESET: For resetting the address when
the wiring is changed or when an additional
indoor unit is installed
▪ DIP switches (DS1 and DS2)
8 HP
▪ BS1: MODE: For changing the set mode
▪ BS2: SET: For field setting
▪ BS3: RETURN: For field setting
7‑LEDs display
The display gives feedback about the field settings, which are
defined as [Mode-Setting]=Value.
The display differs depending on the model.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
33
7 Configuration
Switching between modes
Display
5 HP
Use BS1 to switch between the default situation, mode 1 and
mode 2.
7‑LEDs display:
▪ H1P: Shows the mode
5 HP
a
S1
[5
B
B
B
S1
(H8P: NOT used for field settings, but used during
initialisation)
B
S1
▪ H2P~H7P: Shows the settings and values,
represented in binary code
S1
Model
s]
)
7‑segments display (
b
Example:
c
a
8 HP
[H1P - 32 + 16 + 8 + 4 + 2 + 1]
Description
S1
B
S1
S1
B
B
[5
Default situation
B
H1P H2P H3P H4P H5P H6P H7P
S1
8 HP
s]
(H1P OFF)
b
Mode 1
a
b
c
BS1
BS1 [5 s]
(H1P flashing)
Mode 2
c
Default situation (H1P OFF)
Mode 1 (H1P flashing)
Mode 2 (H1P ON)
Press BS1.
Press BS1 for at least 5 s.
(H1P ON)
INFORMATION
Setting 8
0 + 0 + 8 + 0 + 0 + 0
If you get confused in the middle of the process, press BS1
to return to the default situation.
(in mode 2)
(H2P~H7P = binary 8)
Value 4
0 + 0 + 0 + 4 + 0 + 0
(in mode 2)
(H2P~H7P = binary 4)
7.2.4
To access mode 1 or 2
7.2.5
To use mode 1 (and default situation)
In mode 1 (and in default situation) you can read out some
information. How to do this differs depending on the model.
Example: 7‑LEDs display – Default situation
After the units are turned ON, the display goes to its default
situation. From there, you can access mode 1 and mode 2.
Initialisation: default situation
(in case of 5 HP)
You can read out the status of low noise operation as follows:
#
Action
NOTICE
1
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.
Make sure the LEDs are
showing the default situation.
Button/display
2
Check the status of LED
H6P.
(H1P OFF)
H6P OFF: Unit is currently
not operating under low noise
restrictions.
Turn on the power supply of the compressor unit, heat exchanger
unit, and all indoor units. When the communication between the
compressor unit, heat exchanger unit, and indoor units is established
and normal, the display indication state will be as below (default
situation when shipped from factory).
5 HP
H6P ON: Unit is currently
operating under low noise
restrictions.
8 HP
a
a
Example: 7‑LEDs display – Mode 1
(in case of 5 HP)
You can read out setting [1‑5] (= the total number of connected units
(heat exchanger unit + indoor units)) as follows:
10~12 min
1~2 min
8~10 min
b
Action
Button/display
1
Start from the default
situation.
2
Select mode 1.
BS1 [1×]
3
Select setting 5.
BS2 [X×]
b
c
a
b
c
#
Power ON
Default situation
LED indication when there is a malfunction
("X×" depends on the setting
that you want to select.)
(= binary 5)
If the default situation is not displayed after 10~12 minutes, check
the malfunction code on the indoor unit user interface (and in case of
8 HP on the compressor unit 7‑segment display). Solve the
malfunction code accordingly. First, check the communication wiring.
Installer and user reference guide
34
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
7 Configuration
#
Action
4
Display the value of setting 5.
Button/display
BS3 [1×]
Example: 7‑segments display – Mode 2
(in case of 8 HP)
You can change the value of setting [2‑8] (= Te target temperature
during cooling operation) to 4 (= 8°C) as follows:
(there are 8 units connected)
(= binary 8)
5
Quit mode 1.
BS1 [1×]
Example: 7‑segments display – Mode 1
#
Action
Button/display
1
Start from the default
situation.
2
Select mode 2.
BS1 [5 s]
3
Select setting 8.
BS2 [X×]
(in case of 8 HP)
You can read out setting [1‑10] (= the total number of connected
units (heat exchanger unit + indoor units)) as follows:
#
1
Action
("X×" depends on the setting
that you want to select.)
Button/display
4
Start from the default
situation.
a: Display the current value.
2
Select mode 1.
BS1 [1×]
3
Select setting 10.
BS2 [X×]
Display the value of setting
10.
c: Enter the value in the
system.
BS3 [1×]
d: Confirm. The system starts
operating according to the
setting.
(there are 8 units connected)
5
7.2.6
Quit mode 1.
BS1 [1×]
Example: 7‑LEDs display – Mode 2
You can change the value of setting [2‑8] (= Te target temperature
during cooling operation) to 4 (= 8°C) as follows:
Action
Mode 1 (and default situation): Monitoring
settings
In mode 1 (and in default situation) you can read out some
information. What you can read out differs depending on the model.
2
Select mode 2.
BS1 [5 s]
3
Select setting 8.
BS2 [X×]
c: Enter the value in the
system.
a BS3 [1×]
b BS2 [X×]
c BS3 [1×]
d BS3 [1×]
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
ON
Low noise operation reduces the sound generated by the
unit compared to nominal operating conditions.
Low noise operation can be set in mode 2. There are two
methods to activate low noise operation of the compressor
unit and heat exchanger unit.
▪ 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.
d: Confirm. The system starts
operating according to the
setting.
Quit mode 2.
Unit is currently not operating under low noise
restrictions.
Unit is currently operating under low noise
restrictions.
(= binary 8)
b: Change to 4. ("X×"
depends on the current
value, and the value that you
want to select.)
Value / Description
Shows the status of low noise operation.
OFF
("X×" depends on the setting
that you want to select.)
a: Display the current value.
You can read out the following information:
H6P
Start from the default
situation.
Select value 4 (= 8°C).
(in case of 5 HP)
Button/display
1
5
BS1 [1×]
Quit mode 2.
7‑LEDs display – Default situation (H1P OFF)
(in case of 5 HP)
4
5
7.2.7
To use mode 2
In mode 2 you can make field settings to configure the system. How
to do this differs slightly depending on the model.
#
b BS2 [X×]
c BS3 [1×]
d BS3 [1×]
b: Change to 4. ("X×"
depends on the current
value, and the value that you
want to select.)
("X×" depends on the setting
that you want to select.)
4
a BS3 [1×]
Select value 4 (= 8°C).
BS1 [1×]
Installer and user reference guide
35
7 Configuration
Value / Description
H7P
Shows the status of power consumption limitation operation.
OFF
Unit is currently not operating under power
consumption limitations.
Setting
0
Shows the status
of low noise
operation.
Unit is currently not operating under low
noise restrictions.
1
Unit is currently operating under low
noise restrictions.
Low noise operation reduces the sound
generated by the unit compared to nominal
operating conditions.
ON
Unit is currently operating under power consumption
limitation.
Low noise operation can be set in mode 2.
There are two methods to activate low noise
operation of the compressor unit and heat
exchanger unit.
Power consumption limitation reduces the power
consumption of the unit compared to nominal operating
conditions.
Power consumption limitation can be set in mode 2. There
are two methods to activate power consumption limitation of
the compressor unit.
▪ 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 first method is to enable a forced power consumption
limitation by field setting. The unit will always operate at
the selected power consumption limitation.
▪ The second method is to enable power consumption
limitation based on an external input. For this operation
an optional accessory is required.
7‑LEDs display – Mode 1 (H1P flashing)
(in case of 5 HP)
You can read out the following information:
Setting
(
Value / Description
)
It can be convenient to check if
the total number of units which
Shows the total number of
are installed (heat exchanger unit
connected units (heat exchanger
+ indoor units) match the total
unit + indoor units).
number of units which are
recognised by the system. In
case there is a mismatch, it is
advised to check the
communication wiring path
between compressor unit and
heat exchanger unit, and
between compressor unit and
indoor units (F1/F2
communication line).
▪ The second method is to enable low noise
operation based on an external input. For this
operation an optional accessory is required.
[1‑2]
0
Unit is currently not operating under
power consumption limitations.
Shows the status
1
Unit is currently operating under power
of power
consumption limitation.
consumption
limitation
Power consumption limitation reduces the power
operation.
consumption of the unit compared to nominal
operating conditions.
Power consumption limitation can be set in
mode 2. There are two methods to activate
power consumption limitation of the compressor
unit.
[1‑5]
[1‑14]
Shows the latest malfunction
code.
[1‑15]
Shows the 2nd last malfunction
code.
[1‑16]
Shows the 3rd last malfunction
code.
▪ The first method is to enable a forced power
consumption limitation by field setting. The
unit will always operate at the selected power
consumption limitation.
▪ The second method is to enable power
consumption limitation based on an external
input. For this operation an optional accessory
is required.
[1‑5]
When the latest malfunction
codes were reset by accident on
an indoor unit user interface, they
can be checked again through
this monitoring settings.
Shows the current
Te target
parameter
position.
For the content or reason behind
the malfunction code see
"11.3 Solving problems based on
error codes" on page 46, where
most relevant malfunction codes
are explained. Detailed
information about malfunction
codes can be consulted in the
service manual of this unit.
Shows the current
Tc target
parameter
position.
To obtain more detailed
information about the malfunction
code, press BS2 up to 3 times.
7‑segments display – Mode 1
Value / Description
[1‑1]
[1‑6]
[1‑10]
Shows the total
number of
connected units
(heat exchanger
unit + indoor
units).
For more information, see setting [2‑8].
For more information, see setting [2‑9].
It can be convenient to check if the total number
of units which are installed (heat exchanger unit
+ indoor units) match the total number of units
which are recognised by the system. In case
there is a mismatch, it is advised to check the
communication wiring path between compressor
unit and heat exchanger unit, and between
compressor unit and indoor units (F1/F2
communication line).
(in case of 8 HP)
You can read out the following information:
Installer and user reference guide
36
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
7 Configuration
Setting
Value / Description
Setting
[1‑17]
When the latest malfunction codes were reset by
accident on an indoor unit user interface, they
Shows the latest
can be checked again through this monitoring
malfunction code.
settings.
[1‑18]
For the content or reason behind the malfunction
Shows the 2nd
code see "11.3 Solving problems based on error
last malfunction
codes" on page 46, where most relevant
code.
malfunction codes are explained. Detailed
information about malfunction codes can be
[1‑19]
consulted in the service manual of this unit.
Shows the 3rd
last malfunction
code.
7.2.8
[1‑40]
Value / Description
For more information, see setting [2‑81].
Shows the current
cooling comfort
setting.
[1‑41]
For more information, see setting [2‑82].
Shows the current
heating comfort
setting.
Mode 2: Field settings
In mode 2 you can make field settings to configure the system. The display and the settings differ depending on the model.
Model
Display
Setting/value
5 HP
The seven LEDs give a binary representation of the setting/value number.
7‑LEDs display
8 HP
The three 7‑segments show the setting/value number.
7‑segments display
For more information and advice about the impact of the following settings, see "7.3 Energy saving and optimum operation" on page 40:
• In case of 5 HP: settings [2‑8], [2‑9], [2‑41] and [2‑42]
• In case of 8 HP: settings [2‑8], [2‑9], [2‑81] and [2‑82]
Setting
Value
Description
(8 HP)
[2‑8]
Te target temperature during cooling operation.
[2‑9]
Enable the low noise function and/or power
consumption limitation via external control adaptor
(DTA104A61/62).
(default)
6°C
3
7°C
4
8°C
5
9°C
6
10°C
7
11°C
0 (default)
Fan static pressure setting (in heat exchanger unit).
You can set the external static pressure of the heat
exchanger unit according to the ducting requirements.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Auto
(default)
1
41°C
3
43°C
6
46°C
0 (default)
Deactivated.
(= binary 1) (default)
1
Activated.
(= binary 2)
If the system needs to be running under low noise
operation or under power consumption limitation
conditions when an external signal is sent to the unit,
this setting should be changed. This setting will only be
effective when the optional external control adaptor
(DTA104A61/62) is installed in the indoor unit.
[2‑15]
Auto
2
Tc target temperature during heating operation.
[2‑12]
(5 HP)
0 (default)
0
30 Pa
1 (default)
60 Pa
(default)
2
90 Pa
3
120 Pa
4
150 Pa
Installer and user reference guide
37
7 Configuration
Setting
Value
Description
[2‑16]
Test run heat exchanger unit.
(8 HP)
(5 HP)
0 (default)
—
Deactivated.
1
—
Activated.
When activated, the heat exchanger fans start running.
This allows you to check the ducting with a running
heat exchanger unit.
[2‑20]
0 (default)
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.
[2‑21]
(= binary 1) (default)
1
[2‑22]
[2‑25]
Low noise operation level via the external control
adaptor.
If the system needs to be running under low noise
operation conditions when an external signal is sent to
the unit, this setting defines the level of low noise that
will be applied.
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.
0 (default)
Deactivated.
(= binary 1) (default)
1
Activated.
(= binary 2)
To stop the refrigerant recovery/vacuuming
mode, push BS1 (in case of 5 HP) or BS3 (in
case of 8 HP). If it is not pushed, the system
will remain in refrigerant recovery/vacuuming
mode.
0 (default)
Automatic low noise setting and level during night time.
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].
Activated.
(= binary 2)
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.
Deactivated.
Deactivated
(default)
1
Level 1
2
Level 2
3
Level 3
1
Level 1
2 (default)
Level 2
Level 3<Level 2<Level 1
Level 3<Level 2<Level 1
(default)
3
Level 3
(= binary 4)
This setting will only be effective when the optional
external control adaptor (DTA104A61/62) is installed
and the setting [2‑12] was activated.
[2‑26]
Low noise operation start time.
1
20h00
2 (default)
22h00
(default)
This setting is used in conjunction with setting [2‑22].
3
24h00
(= binary 4)
[2‑27]
1
6h00
Low noise operation stop time.
2
7h00
3 (default)
8h00
This setting is used in conjunction with setting [2‑22].
(= binary 4) (default)
Installer and user reference guide
38
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
7 Configuration
Setting
Value
Description
(8 HP)
[2‑30]
1
Power consumption limitation level (step 1) via the
external control adaptor (DTA104A61/62).
2
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.
[2‑31]
(5 HP)
60%
—
3 (default)
70%
(= binary 2) (default)
4
—
5
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.
[2‑32]
80%
6
—
85%
7
—
90%
8
—
95%
30%
(= binary 1)
1 (default)
40%
(= binary 2) (default)
2
50%
(= binary 4)
3
—
0 (default)
Forced, all time, power consumption limitation
operation (no external control adaptor is required to
perform power consumption limitation).
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.
[2‑81] (in case of 8 HP)
55%
Function not active.
(= binary 1) (default)
1
Follows [2‑30] setting.
(= binary 2)
2
Follows [2‑31] setting.
(= binary 4)
0
(= binary [2‑41]) (in case of
75%
(= binary 4)
—
Power consumption limitation level (step 2) via the
external control adaptor (DTA104A61/62).
65%
Eco
1 (default)
5 HP)
Mild
(default)
Cooling comfort setting.
2
Quick
This setting is used in conjunction with setting [2‑8].
3
Powerful
[2‑82] (in case of 8 HP)
0
Eco
1 (default)
Mild
(= binary [2‑42]) (in case of
5 HP)
(default)
Heating comfort setting.
2
Quick
This setting is used in conjunction with setting [2‑9].
3
Powerful
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VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
39
7 Configuration
7.2.9
idea, the system automatically starts increasing its refrigerant
temperature, automatically reducing the delivered capacity and
increasing the system's efficiency.
To connect the PC configurator to the
compressor unit
5 HP
a
8 HP
a
b
E.g., when your system is operating in heating, you do not need as
much heating under high outdoor ambient temperatures (e.g., 15°C)
as under low outdoor ambient temperatures (e.g., –5°C). Using this
idea, the system automatically starts decreasing its refrigerant
temperature, automatically reducing the delivered capacity and
increasing the system's efficiency.
b
Change…
To activate this in…
H JST
X41A
A1P
2
3
4
Cooling operation
[2‑8]=0 (default)
X27A
Heating operation
[2‑9]=0 (default)
A1P
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.
5
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.
a
b
X27A
X41A
A1P
7.3
To activate this in…
PC
Cable (EKPCCAB)
Connector
Connector
Compressor unit main PCB
Energy saving and optimum
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.
This heat pump system is equipped with advanced energy saving
functionality. Depending on the priority, emphasises can be put on
energy saving or comfort level. Several parameters can be selected,
resulting in the optimal balance between energy consumption and
comfort for the particular application.
Several patterns are available and explained below. Modify the
parameters to the needs of your building and to realize the best
balance between energy consumption and comfort.
No matter which control is selected, variations on the behaviour of
the system are still possible due to protection controls to keep the
unit operating under reliable conditions. The intentional target,
however, is fixed and will be used to obtain the best balance
between energy consumption and comfort, depending on the
application type.
7.3.1
[2‑8]
Te target (°C)
2
6
3
7
4
8
5
9
6
10
7
11
[2‑9]
Tc target (°C)
1
41
3
43
6
46
Available main operation methods
7.3.2
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
Installer and user reference guide
40
Change…
Cooling operation
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.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
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7 Configuration
▪ 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…
Heating operation
Change…
[2‑82]=1 (in case of 8 HP)
[2‑42]=1 (in case of 5 HP).
Change…
To activate this in…
Cooling operation
[2‑41]=3 (in case of 5 HP).
This setting is used in
conjunction with setting [2‑8].
Heating operation
This setting is used in
conjunction with setting [2‑9].
[2‑81]=3 (in case of 8 HP)
[2‑82]=3 (in case of 8 HP)
Eco
The original refrigerant temperature target, which is defined by the
operation method (see above) is kept without any correction, unless
for protection control.
[2‑42]=3 (in case of 5 HP).
This setting is used in
conjunction with setting [2‑9]
To activate this in…
Cooling operation
Change…
[2‑81]=0 (in case of 8 HP)
[2‑41]=0 (in case of 5 HP).
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.
This setting is used in
conjunction with setting [2‑8].
Heating operation
[2‑82]=0 (in case of 8 HP)
[2‑42]=0 (in case of 5 HP).
This setting is used in
conjunction with setting [2‑9].
▪ 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.
7.3.3
Example: Automatic mode during cooling
E
▪ 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.
Change…
To activate this in…
Cooling operation
100%
[2‑81]=2 (in case of 8 HP)
[2‑41]=2 (in case of 5 HP).
A
This setting is used in
conjunction with setting [2‑8].
Heating operation
[2‑42]=2 (in case of 5 HP).
50%
B
[2‑82]=2 (in case of 8 HP)
Te
This setting is used in
conjunction with setting [2‑9].
Mild
Overshoot (during heating operation) or undershoot (during cooling
operation) is allowed compared to the requested refrigerant
temperature, in order to achieve the required room temperature very
fast. The overshoot is not allowed from the start up moment. The
start up occurs under the condition which is defined by the operation
mode above.
▪ In case of cooling operation the evaporating temperature is
allowed to go down to 6°C on temporary base depending on the
situation.
C
D
6°C
▪ In case of heating operation the condense temperature is allowed
to go up to 46°C on temporary base depending on the situation.
▪ When the request from the indoor units becomes more moderate,
the system will eventually go to the steady state condition which is
defined by the operation method above.
▪ The start up condition is different from the powerful and quick
comfort setting.
To activate this in…
Cooling operation
Change…
[2‑81]=1 (in case of 8 HP)
[2‑41]=1 (in case of 5 HP).
This setting is used in
conjunction with setting [2‑8].
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
3°C
35°C
A
B
C
D
E
F
Te
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
Installer and user reference guide
41
8 Commissioning
Room temperature evolution:
Room temperature evolution:
A
F
D
F
E
E
D
A
B
C
A
B
C
D
E
F
B
Indoor unit set temperature
Operation start
Operating time
Mild
Quick
Powerful
C
A
B
C
D
E
F
Indoor unit set temperature
Operation start
Operating time
Mild
Quick
Powerful
Example: Automatic mode during heating
7.3.4
E
100%
A
8
Commissioning
8.1
Overview: Commissioning
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.
B
70%
This chapter describes what you have to do and know to
commission the system after it is configured.
Commissioning typically consists of the following stages:
1
Checking the "Checklist before commissioning".
2
Performing a test run.
3
If necessary, correcting errors after abnormal completion of the
test run.
Tc
4
Operating the system.
49°C
46°C
8.2
C
Precautions when commissioning
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
CAUTION
Do not perform the test operation while working on the
indoor units or the heat exchanger unit.
When performing the test operation, not only the
compressor unit will operate, but the heat exchanger unit
and the connected indoor units as well. Working on an
indoor unit or the heat exchanger unit while performing a
test operation is dangerous.
D
2°C
A
B
C
D
E
F
Tc
Installer and user reference guide
42
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
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.
INFORMATION
During the first running period of the unit, the required
power may be higher than stated on the nameplate of the
unit. This phenomenon is caused by the compressor, that
needs a continuous run time of 50 hours before reaching
smooth operation and stable power consumption.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
8 Commissioning
NOTICE
Refrigerant leak
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.
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.
During test operation, the compressor unit, the heat exchanger unit
and the indoor units will start up. Make sure that the preparations of
the heat exchanger unit and all the indoor units are finished (field
piping, electrical wiring, air purge, ...). See installation manual of the
indoor units for details.
8.3
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.
Checklist before commissioning
Air inlet/outlet
Check that the air inlet and outlet of the unit is not
obstructed by paper sheets, cardboard, or any other
material.
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.
Additional refrigerant charge
The amount of refrigerant to be added to the unit shall be
written on the included "Added refrigerant" plate and
attached to the rear side of the front cover.
Installation
Installation date and field setting
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Be sure to keep record of the installation date on the
sticker on the rear of the front panel according to
EN60335‑2‑40 and keep record of the contents of the field
setting(s).
Field wiring
Be sure that the field wiring has been carried out
according to the instructions described in the chapter
"6.9 Connecting the electrical wiring" on page 28,
according to the wiring diagrams and according to the
applicable legislation.
Insulation and air leaks
Make sure the unit is fully insulated and checked for air
leaks.
Power supply voltage
Possible consequence: Condensate water might drip.
Check the power supply voltage on the local supply panel.
The voltage must correspond to the voltage on the
identification label of the unit.
Drainage
Earth wiring
Possible consequence: Condensate water might drip.
Make sure drainage flows smoothly.
External static pressure
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
Make sure the external static pressure is set.
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.
Possible consequence: Insufficient cooling or heating.
8.4
Checklist during commissioning
To perform a test run.
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or the locally
installed protection devices are of the size and type
specified in the chapter "5.4.2 Safety device
requirements" on page 16. Be sure that neither a fuse nor
a protection device has been bypassed.
Internal wiring
Visually check the electrical component box and the
inside of the unit on loose connections or damaged
electrical components.
8.4.1
About test run
The procedure below describes the test operation of the complete
system. This operation checks and judges following items:
▪ Check of wrong wiring (communication check with indoor units
and heat exchanger unit).
▪ Check of the stop valves opening.
▪ Check of wrong piping. Example: Gas or liquid pipes switched.
Pipe size and pipe insulation
▪ Judgement of piping length.
Be sure that correct pipe sizes are installed and that the
insulation work is properly executed.
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.
Stop valves
Be sure that the stop valves are open on both liquid and
gas side.
Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
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Abnormalities on indoor units cannot be checked for each unit
separately. After the test operation is finished, check the indoor units
one by one by performing a normal operation using the user
interface. Refer to the indoor unit installation manual for more details
concerning the individual test run.
Installer and user reference guide
43
8 Commissioning
2
INFORMATION
▪ It may take 10 minutes to achieve a uniform refrigerant
state before the compressor starts.
▪ During the test operation, the refrigerant running sound
or the magnetic sound of a solenoid valve may become
loud and the display indication may change. These are
not malfunctions.
8.4.2
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
3
To perform a test run (7-LEDs display)
(in case of 5 HP)
1
Make sure all field settings you want are set; see "7.2 Making
field settings" on page 32.
2
Turn ON the power to the compressor unit, heat exchanger unit,
and the connected indoor units.
Turn ON the power to the compressor unit, heat exchanger unit,
and the connected indoor units.
Make sure the default (idle) situation is existing; see "7.2.4 To
access mode 1 or 2" on page 34. Push BS2 for 5 seconds or
more. The unit will start test operation.
Result: The test operation is automatically carried out, the
compressor unit display will indicate "
" and the indication
"Test operation" and "Under centralised control" will display on
the user interface of indoor units.
Steps during the automatic system test run procedure:
Step
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
3
Cooling start up control
Cooling stable condition
Communication check
Make sure the default (idle) situation is existing (H1P is OFF);
see "7.2.4 To access mode 1 or 2" on page 34. Push BS4 for 5
seconds or more. The unit will start test operation.
Stop valve check
Pipe length check
Result: The test operation is automatically carried out, the
compressor unit H2P flashes and the indication "Test operation"
and "Under centralised control" will display on the user interface
of indoor units.
Pump down operation
Unit stop
INFORMATION
Steps during the automatic system test run procedure:
Step
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.
Description
Control before start up (pressure
equalisation)
Cooling start up control
4
Check the test operation results on the compressor unit
7‑segment display.
Cooling stable condition
Communication check
Stop valve check
Pipe length check
Pump down operation
Completion
No indication on the 7‑segment display (idle).
Abnormal
completion
Indication of malfunction code on the
7‑segment display.
Refer to "8.4.4 Correcting after abnormal
completion of the test run" on page 44 to take
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
INFORMATION
During the test operation, it is not possible to stop the unit
operation from a user interface. To abort the operation,
press BS3. The unit will stop after ±30 seconds.
Check the test operation results on the compressor unit 7‑LEDs
display.
Completion
Description
Normal
completion
Abnormal
completion
8.4.3
Refer to "8.4.4 Correcting after abnormal
completion of the test run" on page 44 to take
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
To perform a test run (7-segments
display)
(in case of 8 HP)
1
Make sure all field settings you want are set; see "7.2 Making
field settings" on page 32.
Installer and user reference guide
44
Description
Normal
completion
Unit stop
4
Description
Control before start up (pressure equalisation)
8.4.4
Correcting after abnormal completion of
the test run
The test operation is only completed if there is no malfunction code
displayed. In case of a displayed malfunction code, perform
correcting actions as explained in the malfunction code table. Carry
out the test operation again and confirm that the abnormality is
properly corrected.
INFORMATION
If a malfunction occurs:
▪ In case of 5 HP: The error code is displayed on the
user interface of the indoor unit.
▪ In case of 8 HP: The error code is displayed on the
compressor unit's 7‑segments display and on the user
interface of the indoor unit.
INFORMATION
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
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9 Hand-over to the user
8.4.5
Operating the unit
Once the units are installed and test operation of compressor unit,
heat exchanger unit and indoor units is finished, the operation of the
system can start.
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.
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.
9
5 HP
Hand-over to the user
A1P
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
C−
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation on the url as earlier described in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
A2P
Maintenance and service
NOTICE
3
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
10.1
Overview: Maintenance and
service
TP1
TP2
A3P
To prevent damaging the PCB, touch a non-coated metal part
to eliminate static electricity before pulling out or plugging in
connectors.
For details refer to the wiring diagram labelled on the back of the
service cover.
10.3
Checklist for yearly maintenance
of the heat exchanger unit
Maintenance must be done by an authorised installer or
service agent.
We recommend to do maintenance at least once a year.
However, applicable legislation might require shorter
maintenance intervals.
C+
A1P
▪ Show the user what to do in relation to maintaining the unit.
10
8 HP
Check the following at least once a year:
▪ Heat exchanger.
The heat exchanger can get blocked up due to dust, dirt, leaves, etc.
It is recommended to clean the heat exchanger yearly. A blocked
heat exchanger can lead to too low pressure or too high pressure
leading to worse performance.
10.4
About service mode operation
Refrigerant recovery operation/vacuuming operation is possible by
applying setting [2‑21]. Refer to "7.2 Making field settings" on
page 32 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.
This chapter contains information about:
▪ Preventing electrical hazards when maintaining and servicing the
system
10.4.1
1
To use vacuum mode
▪ The refrigerant recovery operation
When the unit is at standstill, activate setting [2‑21] to start
vacuuming mode.
10.2
5 HP
When confirmed, the expansion valves (in the
indoor unit, compressor unit and heat
exchanger unit) will fully open. At that moment
H1P lights and the user interface of all indoor
units indicate TEST (test operation) and
(external control) and the operation will be
prohibited.
8 HP
When confirmed, the expansion valves (in the
indoor unit, compressor unit and heat
exchanger unit) will fully open. At that moment
and the
the 7‑segment display indication=
user interface of all indoor units indicate TEST
(test operation) and
(external control)
and the operation will be prohibited.
Model
Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
NOTICE: Risk of electrostatic discharge
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
10.2.1
To prevent electrical hazards
When performing service to inverter equipment:
2
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Result
Evacuate the system with a vacuum pump.
Installer and user reference guide
45
11 Troubleshooting
3
Press BS1 (in case of 5 HP) or BS3 (in case of 8 HP) to stop
vacuuming mode.
10.4.2
DANGER: RISK OF ELECTROCUTION
WARNING
To recover refrigerant
Prevent hazard due to the inadvertent resetting of the
thermal cut-out: this appliance must NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
This should be done by a refrigerant reclaimer. Follow the same
procedure as for vacuuming method.
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.
DANGER: RISK OF BURNING
11.3
Solving problems based on error
codes
In case of a displayed malfunction code, perform correcting actions
as explained in the malfunction code table.
After correcting the abnormality, press BS3 to reset the malfunction
code and retry operation.
NOTICE
INFORMATION
Make sure to NOT recover any oil while recovering
refrigerant. Example: By using an oil separator.
If a malfunction occurs:
▪ In case of 5 HP: The error code is displayed on the
user interface of the indoor unit.
▪ In case of 8 HP: The error code is displayed on the
compressor unit's 7‑segments display and on the user
interface of the indoor unit.
11
Troubleshooting
11.1
Overview: Troubleshooting
Carry out a thorough visual inspection of the unit and look for
obvious defects such as loose connections or defective wiring.
In case of 8 HP: The error code on the compressor unit will indicate
a main malfunction code and a sub code. The sub code indicates
more detailed information about the malfunction code. The main
code and sub code will be displayed intermittent (with an interval of
1 second). Example:
11.2
▪ Main code:
Before troubleshooting
Precautions when troubleshooting
WARNING
▪ Sub code:
▪ When carrying out an inspection on the switch box of
the unit, always make sure that the unit is disconnected
from the mains. Turn off the respective circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER bridge safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
11.3.1
Error codes: Overview
In case of 5 HP:
Main code
Cause
Solution
▪ Heat exchanger fan malfunction.
In the heat exchanger unit:
▪ Drain pump feedback contact is open.
▪ Check connection on PCB: A1P (X15A)
▪ Check connection on terminal block (X2M)
▪ Check the fan connectors.
▪ The stop valves of the compressor unit are left closed.
▪ Open the stop valves on both the gas and liquid side.
▪ Refrigerant overcharge
▪ Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge level by
recovering any excessive refrigerant with a refrigerant
recovery machine.
Installer and user reference guide
46
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
11 Troubleshooting
Main code
Cause
Solution
▪ The stop valves of the compressor unit are left closed.
▪ Open the stop valves on both the gas and liquid side.
▪ Insufficient refrigerant
▪ Check if the additional refrigerant charge has been
finished correctly. Recalculate the required amount of
refrigerant from the piping length and add an adequate
amount of refrigerant.
Electronic expansion valve malfunction
Check connection on PCB or actuator.
Heat exchanger unit: (Y1E) - A1P (X7A)
Compressor unit: (Y1E) - A1P (X22A)
▪ The stop valves of the compressor unit are left closed.
▪ Open the stop valves on both the gas and liquid side.
▪ Insufficient refrigerant
▪ Check if the additional refrigerant charge has been
finished correctly. Recalculate the required amount of
refrigerant from the piping length and add an adequate
amount of refrigerant.
Refrigerant overcharge
Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge level by
recovering any excessive refrigerant with a refrigerant
recovery machine.
Ambient temperature sensor malfunction
Check connection on PCB or actuator.
Heat exchanger unit: (R1T) - A1P (X16A)
Discharge temperature sensor malfunction: open circuit /
short circuit
Check connection on PCB or actuator.
Compressor unit: (R2T) - A1P (X12A)
Heat exchanger gas sensor malfunction
Check connection on PCB or actuator.
Heat exchanger unit: (R2T) - A1P (X18A)
Suction temperature sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (R3T) - A1P (X12A)
Compressor unit: (R5T) - A1P (X12A)
Coil temperature sensor malfunction
Check connection on PCB or actuator.
Heat exchanger unit: (R3T) - A1P (X17A)
Liquid temperature sensor (after subcool HE) malfunction
Check connection on PCB or actuator.
Compressor unit: (R7T) - A1P (X13A)
Gas temperature sensor (after subcool HE) malfunction
Check connection on PCB or actuator.
Compressor unit: (R4T) - A1P (X12A)
High pressure sensor malfunction: open circuit / short circuit Check connection on PCB or actuator.
Compressor unit: (BIPH) - A1P (X17A)
Low pressure sensor malfunction: open circuit / short circuit Check connection on PCB or actuator.
Compressor unit: (BIPL) - A1P (X18A)
Transmission compressor unit - inverter: INV1 transmission
trouble
Check connection.
INV1 unbalanced power supply voltage
Check if power supply is within range.
Heat exchanger unit capacity setting malfunction.
Check the type of heat exchanger unit. If necessary, replace
the heat exchanger unit.
Insufficient supply voltage
Check if the supply voltage is supplied properly.
Malfunction code: System test run not yet executed (system Execute system test run.
operation not possible)
▪ No power is supplied to the compressor unit.
▪ Check if all units are powered on.
▪ Transmission wiring malfunction
▪ Check the transmission wiring.
▪ System mismatch. Wrong type of indoor units combined ▪ Check if other indoor units have malfunction and confirm
(R410A, R407C, RA, etc). Indoor unit malfunction
indoor unit mix is allowed.
▪ Heat exchanger unit malfunction
▪ Check the transmission wiring to the heat exchanger unit.
▪ Improper type of indoor units are connected.
▪ Check the type of indoor units that are currently
connected. If they are not proper, replace them with
proper ones.
▪ Mismatch of compressor unit and heat exchanger unit.
▪ Check if the compressor unit and heat exchanger unit are
compatible.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
47
11 Troubleshooting
Main code
Cause
Solution
▪ The stop valves of the compressor unit are left closed.
▪ Open the stop valves on both the gas and liquid side.
▪ The piping and wiring of the specified indoor unit or heat ▪ Confirm that the piping and wiring of the specified indoor
exchanger unit are not connected correctly to the unit or heat exchanger unit are connected correctly to the
compressor unit.
compressor unit.
In case of 8 HP:
Main code
Sub code
Cause
Solution
▪ Heat exchanger fan malfunction.
In the heat exchanger unit:
▪ Drain pump feedback contact is open.
▪ Check connection on PCB: A1P (X15A)
▪ Check connection on terminal block (X2M)
▪ Check the fan connectors.
Earth leakage detector activated
Compressor unit: (T1A) - A1P (X101A)
No earth leakage detector detected
Restart the unit. If the problem reoccurs, contact
your dealer.
Replace the earth leakage detector.
Compressor unit: (T1A) - A1P (X101A)
High pressure switch was activated
Compressor unit: (S1PH) - A1P (X4A)
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
▪ Check the user interface's display or
transmission wiring between the outdoor unit
and the indoor unit.
▪ Indoor unit malfunction
Electronic expansion valve malfunction (subcool)
Check connection on PCB or actuator.
Compressor unit: (Y1E) - A1P (X21A)
Electronic expansion valve malfunction (main)
Check connection on PCB or actuator.
Heat exchanger unit: (Y1E) - A1P (X7A)
Discharge temperature too high:
▪ Open stop valves.
▪ Stop valve closed
▪ Check refrigerant amount+recharge unit.
▪ Refrigerant shortage
Compressor unit: (R21T) - A1P (X29A)
▪ Refrigerant overcharge
▪ Check refrigerant amount+recharge unit.
▪ Stop valve closed
▪ Open stop valves.
Ambient temperature sensor malfunction
Check connection on PCB or actuator.
Heat exchanger unit: (R1T) - A1P (X16A)
Discharge temperature sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (R21T): open circuit - A1P
(X29A)
Discharge temperature sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (R21T): short circuit - A1P
(X29A)
Heat exchanger gas sensor malfunction
Check connection on PCB or actuator.
Heat exchanger unit: (R2T) - A1P (X18A)
Suction temperature sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (R3T) - A1P (X30A)
Suction temperature sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (R7T) - A1P (X30A)
De-icing temperature sensor malfunction
Check connection on PCB or actuator
Heat exchanger unit: (R3T) - A1P (X17A)
Installer and user reference guide
48
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
11 Troubleshooting
Main code
Sub code
Cause
Solution
Liquid temperature sensor (after subcool HE)
malfunction
Check connection on PCB or actuator.
Compressor unit: (R5T) - A1P (X30A)
Gas temperature sensor (after subcool HE)
malfunction
Check connection on PCB or actuator.
Compressor unit: (R6T) - A1P (X30A)
High pressure sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (S1NPH): open circuit - A1P
(X32A)
High pressure sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (S1NPH): short circuit - A1P
(X32A)
Low pressure sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (S1NPL): open circuit - A1P
(X31A)
Low pressure sensor malfunction
Check connection on PCB or actuator.
Compressor unit: (S1NPL): short circuit - A1P
(X31A)
Transmission outdoor unit - inverter: INV1
transmission trouble
Check connection.
Compressor unit: A1P (X20A, X28A, X42A)
INV1 unbalanced power supply voltage
Check if power supply is within range.
Heat exchanger unit capacity setting malfunction.
Check the type of heat exchanger unit. If
necessary, replace the heat exchanger unit.
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.
Malfunction code: System test run not yet
executed (system operation not possible)
Execute system test run.
Faulty wiring to Q1/Q2 or indoor - outdoor
Check (Q1/Q2) wiring. Do NOT use Q1/Q2.
Faulty wiring to Q1/Q2 or indoor - outdoor
Check (Q1/Q2) wiring. Do NOT use Q1/Q2.
System test run abnormal ending
Execute test run again.
Warning: faulty wiring to Q1/Q2
Check Q1/Q2 wiring. Do NOT use Q1/Q2.
Malfunction code: faulty wiring to Q1/Q2
Check Q1/Q2 wiring. Do NOT use Q1/Q2.
▪ Too many indoor units are connected to F1/F2 Check indoor unit amount and total capacity
line
connected.
▪ Bad wiring between outdoor and indoor units
▪ System mismatch. Wrong type of indoor units ▪ Check if other indoor units have malfunction and
combined (R410A, R407C, RA, etc). Indoor unit confirm indoor unit mix is allowed.
malfunction
▪ Check the transmission wiring to the heat
▪ Heat exchanger unit malfunction
exchanger unit.
More than 1 heat exchanger unit connected.
▪ Improper type of indoor units are connected.
▪ Mismatch of compressor
exchanger unit.
unit
and
Check installation. Only 1 heat exchanger unit can
be installed.
▪ Check the type of indoor units that are currently
connected. If they are not proper, replace them
heat
with proper ones.
▪ Check if the compressor unit
exchanger unit are compatible.
5 HP heat exchanger unit connected.
unit
and
▪ Check if transmission wired unit amount
matches with powered unit amount (by monitor
heat
mode) or wait till initialisation is finished.
▪ Check if the compressor unit
exchanger unit are compatible.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
heat
Check installation. Connect 8 HP heat exchanger
unit.
▪ Auto address malfunction (inconsistency)
▪ Mismatch of compressor
exchanger unit.
and
and
heat
Installer and user reference guide
49
12 Disposal
Main code
Sub code
Cause
Solution
▪ Auto address malfunction (inconsistency)
▪ Mismatch of compressor
exchanger unit.
unit
and
▪ Check if transmission wired unit amount
matches with powered unit amount (by monitor
heat
mode) or wait till initialisation is finished.
▪ Check if the compressor unit
exchanger unit are compatible.
and
heat
▪ The stop valves of the compressor unit are left ▪ Open the stop valves on both the gas and liquid
closed.
side.
▪ The piping and wiring of the specified indoor unit ▪ Confirm that the piping and wiring of the
or heat exchanger unit are not connected specified indoor unit or heat exchanger unit are
correctly to the compressor unit.
connected correctly to the compressor unit.
Disposal
12
Dismantling of the unit, and treatment of the refrigerant, oil and other
parts must comply with the applicable legislation.
13
Technical data
Latest information can be found in the technical engineering data.
Piping diagram: Compressor unit
and heat exchanger unit
13.1
5 HP
M2F
M1F
R1T
A
Pressure regulating valve
Capillary tube
Accumulator
Compressor accumulator
Heat exchanger
Compressor
Fan motor
Thermistor (air)
Thermistor (gas)
Thermistor (coil)
Thermistor (discharge)
Thermistor (suction accumulator)
Thermistor (subcool heat exchanger gas)
Thermistor (suction compressor)
Thermistor (liquid)
High pressure sensor
Low pressure sensor
High pressure switch
Electronic expansion valve
Solenoid valve (4‑way valve)
Heating
Cooling
h
i
j
k
l
M1C
M1F, M2F
R1T (A)
R2T (A)
R3T (A)
R2T (B)
R3T (B)
R4T (B)
R5T (B)
R7T (B)
S1NPH
S1NPL
S1PH
Y1E, Y3E
Y1S
8 HP
R3T
M2F
M3F
M1F
R1T
A
R3T
Y1E
l
R2T
f
f
b
B
R7T
f
f
f
Y1S
a
Y1E
l
R2T
B
R3T
R4T
Y1S
a
S1NPH
b
g
R5T
f
S1PH
c
f
d
S1NPH
g
h
k
Y2E
c
S1NPL
R5T
e
f
i
j
R2T
A
B
a
b
c
d
e
f
g
f
h
i
M1C
Heat exchanger unit
Compressor unit
Stop valve (gas) (circuit 2: to indoor units)
Stop valve (liquid) (circuit 2: to indoor units)
Stop valve (liquid) (circuit 1: to heat exchanger unit)
Stop valve (gas) (circuit 1: to heat exchanger unit)
Service port (refrigerant charge)
Filter
Subcool heat exchanger
Installer and user reference guide
f
d
S1PH
S1NPL
k
3D098825-1A
50
R3T
R6T
Y3E
R7T
e
f
R21T
i
j
M1C
3D104510-1
A
B
a
b
c
Heat exchanger unit
Compressor unit
Stop valve (gas) (circuit 2: to indoor units)
Stop valve (liquid) (circuit 2: to indoor units)
Stop valve (liquid) (circuit 1: to heat exchanger unit)
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
13 Technical data
d
e
f
g
h
i
j
k
l
M1C
M1F~M3F
R1T (A)
R2T (A)
R3T (A)
R21T (B)
R3T (B)
R5T (B)
R6T (B)
R7T (B)
S1NPH
S1NPL
S1PH
Y1E, Y2E
Y1S
13.2
Stop valve (gas) (circuit 1: to heat exchanger unit)
Service port (refrigerant charge)
Filter
Subcool heat exchanger
Pressure regulating valve
Capillary tube
Accumulator
Oil separator
Heat exchanger
Compressor
Fan motor
Thermistor (air)
Thermistor (gas)
Thermistor (coil)
Thermistor (discharge)
Thermistor (suction accumulator)
Thermistor (liquid)
Thermistor (subcool heat exchanger gas)
Thermistor (suction compressor)
High pressure sensor
Low pressure sensor
High pressure switch
Electronic expansion valve
Solenoid valve (4‑way valve)
Heating
Cooling
Wiring diagram: Compressor unit
The wiring diagram is delivered with the unit, located on the switch
box cover.
Symbols:
X1M
Thermistor (subcool heat exchanger gas)
R5T
Thermistor (suction compressor)
R7T
Thermistor (liquid)
R10T
Thermistor (fin)
S1NPL
Low pressure sensor
S1NPH
High pressure sensor
S1PH
High pressure switch
S*S
Cool/heat selector switch (optional)
V1R
IGBT power module (A2P)
V2R
Diode module (A2P)
X1M
Terminal strip (power supply)
X2M
Terminal strip (transmission wiring)
X*Y
Connector
Y3E
Electronic expansion valve
Y1S
Solenoid valve (4‑way valve)
Z*C
Noise filter (ferrite core)
Z*F
Noise filter (A1P)
Notes for 8 HP:
1
When using the optional adapter, refer to the installation
manual of the optional adapter.
2
Refer to the installation or service manual on how to use
BS1~BS3 push buttons, and DS1+DS2 DIP switches.
3
Do not operate the unit by short-circuiting protection device
S1PH.
4
For connection of INDOOR-OUTDOOR F1-F2 transmission
wiring, and OUTDOOR-OUTDOOR F1-F2 transmission
wiring, refer to the service manual.
Main terminal
Earth wiring
15
R4T
Wire number 15
Field wire
Field cable
**/12.2
Connection ** continues on page 12 column 2
Legend for wiring diagram 8 HP:
Several wiring possibilities
A1P
Printed circuit board (main)
Option
A2P
Printed circuit board (noise filter)
A3P
Printed circuit board (inverter)
A4P
Printed circuit board (cool/heat selector)
BS*
Push button (mode, set, return) (A1P)
C*
Capacitor (A3P)
Legend for wiring diagram 5 HP:
DS*
DIP switch (A1P)
A1P
Printed circuit board (main)
E1HC
Crankcase heater
Printed circuit board (inverter)
F*U
Fuse (T 3.15 A / 250 V) (A1P)
BS*
Push button (A1P)
F3U
Field fuse
C*
Capacitor (A2P)
F400U
Fuse (T 6.3 A / 250 V) (A2P)
DIP switch (A1P)
F410U
Fuse (T 40 A / 500 V) (A2P)
F1U, F2U
Fuse (T 31.5 A / 250 V) (A1P)
F411U
Fuse (T 40 A / 500 V) (A2P)
F3U, F5U
Fuse (T 6.3 A / 250 V) (A1P)
F412U
Fuse (T 40 A / 500 V) (A2P)
LED (service monitor orange) (A1P)
HAP
Running LED (service monitor green) (A1P)
HAP
Running LED (service monitor green) (A*P)
K1M
Magnetic contactor (A3P)
K1M
Magnetic contactor (A2P)
K*R
Magnetic relay (A*P)
Magnetic relay (A*P)
L1R
Reactor
L1R
Reactor
M1C
Motor (compressor)
M1C
Motor (compressor)
M1F
Motor (fan)
Motor (fan)
PS
Power supply (A1P, A3P)
PS
Switching power supply (A2P)
Q1DI
Earth leakage circuit breaker (field supply)
Q1DI
Earth leakage circuit breaker (field supply)
Q1RP
Phase reversal detect circuit (A1P)
Resistor (A2P)
R21T
Thermistor (M1C discharge)
R2T
Thermistor (discharge)
R3T
Thermistor (accumulator)
R3T
Thermistor (suction accumulator)
R5T
Thermistor (subcool liquid pipe)
1
Not mounted in switch box
Wiring depending on model
PCB
A2P
DS1
H*P
K1R
M1F
R*
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
51
14 About the system
R6T
Thermistor (heat exchanger gas pipe)
Field wire
R7T
Thermistor (suction)
Field cable
R*
Resistor (A3P)
S1NPH
High pressure sensor
S1NPL
Low pressure sensor
S1PH
High pressure switch (discharge)
Option
S1S
Air control switch (optional)
Not mounted in switch box
S2S
Cool/heat selector switch (optional)
Wiring depending on model
**/12.2
1
Several wiring possibilities
SEG1~SEG3 7-segment display
T1A
Earth leakage detector
V1R
IGBT power module (A3P)
V2R
Diode module (A3P)
X37A
Connector (power supply for option PCB) (optional)
A2P
Printed circuit board (adapter)
C1
Capacitor (A1P)
E1H
Drain pan heater (optional)
F1U
Fuse (F 1 A / 250 V) (optional)
F1U
Fuse (T 6.3 A / 250 V for PCB) (A1P)
HAP
Running LED (service monitor green) (A1P)
K1a
Auxiliary relay (optional)
M*F
Motor (fan)
Q1DI
Earth leakage circuit breaker (field supply)
PS
Switching power supply (A1P)
R1T
Thermistor (air)
R2T
Thermistor (gas)
R3T
Thermistor (coil)
V1R
Diode module (A1P)
X1M
Terminal strip (power supply)
X2M
Terminal strip (transmission wiring)
X*Y
Connector
Main terminal
Y1E
Electronic expansion valve
Earth wiring
Z1C
Noise filter (ferrite core)
Wire number 15
Z1F
Noise filter (A1P)
Terminal strip (power supply)
X*A
PCB connector
Terminal strip on PCB (A*P)
X*Y
Connector
Y2E
Electronic expansion valve
Solenoid valve (4‑way valve)
Y1S
Z*C
Noise filter (ferrite core)
Z*F
Noise filter
13.3
Wiring diagram: Heat exchanger
unit
The wiring diagram is delivered with the unit, located at the inside of
the switch box cover.
Symbols:
X1M
15
Legend for wiring diagram 5+8 HP:
Printed circuit board (main)
X1M
X*M
PCB
A1P
Connector (cool/heat selector switch) (optional)
X66A
Connection ** continues on page 12 column 2
For the user
14
About the system
The VRV IV heat pump for indoor installation can be used for
heating/cooling applications.
▪ AHU (air-to-air applications): EKEXV-kit+EKEQM-box required,
depending on the application.
▪ Comfort air curtain (air-to-air applications): CYV (Biddle) series.
NOTICE
Airhandling unit connection in pair to VRV IV heat pump for indoor
installation is supported.
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.
Airhandling unit connection in multi to VRV IV heat pump for indoor
installation is supported, even combined with VRV direct expansion
indoor unit(s).
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
For more specifications, see technical engineering data.
14.1
System layout
1
a
c
▪ VRV direct expansion (DX) indoor units (air to air applications).
Installer and user reference guide
52
c
VRV DX
In general following type of indoor units can be connected to a VRV
IV heat pump for indoor installation (non-exhaustive list, depending
on compressor unit model, heat exchanger unit model and indoor
unit model combinations):
b
1
2
VRV DX
VRV DX
EKEXV
AHU
d
d
d
d
In case of VRV DX indoor units
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
15 User interface
2
a
b
c
d
VRV DX
EKEXV
AHU
In case of VRV DX indoor units combined with an air
handling unit
Heat exchanger unit
Compressor unit
Refrigerant piping
User interface (dedicated depending on indoor unit type)
VRV direct expansion (DX) indoor unit
Expansion valve kit
Air handling unit
17
Operation
17.1
Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
Specification
15
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.
Maximum capacity
Outside ambient
design temperature
Maximum relative
humidity around the
compressor unit and
heat exchanger unit
(a)
Refer to the operation manual of the installed user interface.
Before operation
WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
8 HP
16.0 kW
25.0 kW
Cooling
14.0 kW
22.4 kW
Heating
–20~15.5°C WB
Cooling
–5~46°C DB
Ambient design temperature of
compressor unit and heat exchanger
unit
Detailed information on required actions to achieve certain functions
can be found in the dedicated installation and operation manual of
the indoor unit.
16
5 HP
Heating
5~35°C DB
Heating
50%(a)
Cooling
80%(a)
To avoid condensation and water dripping out of the unit. If
the temperature or the humidity is beyond these conditions,
safety devices may be put in action and the air conditioner
may not operate.
Special operation ranges are valid in case of using AHU. They can
be found in the installation/operation manual of the dedicated unit.
Latest information can be found in the technical engineering data.
17.2
Operating the system
17.2.1
About operating the system
▪ Operation procedure varies according to the combination of
compressor unit, heat exchanger unit, and user interface.
CAUTION
▪ To protect the unit, turn on the main power switch 6 hours before
operation.
It is not good for your health to expose your body to the air
flow for a long time.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
CAUTION
▪ When stopping the unit, the unit might still operate for a few
minutes. This is not a malfunction.
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
17.2.2
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.
Operation modes (depending on indoor unit type):
▪ Heating and cooling (air to air).
▪ Fan only operation (air to air).
Dedicated functions exist depending on the type of indoor unit, refer
to dedicated installation/operation manual for more information.
About cooling, heating, fan only, and
automatic operation
▪ Changeover cannot be made with a user interface whose display
shows
"change-over under centralised control" (refer to
installation and operation manual of the user interface).
▪ When the display
"change-over under centralised control"
flashes, refer to "17.5.1 About setting the master user
interface" on page 55.
▪ The fan may keep on running for about 1 minute after the heating
operation stops.
▪ The air flow rate may adjust itself depending on the room
temperature or the fan may stop immediately. This is not a
malfunction.
17.2.3
About the heating operation
It may take longer to reach the set temperature for general heating
operation than for cooling operation.
The following operation is performed in order to prevent the heating
capacity from dropping or cold air from blowing.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
53
17 Operation
To start
Defrost operation
In heating operation, freezing of the heat exchanger unit's air cooled
coil increases over time, restricting the energy transfer to the heat
exchanger 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.
1
Select operation mode with the cool/heat changeover switch as
follows:
Cooling operation
Heating operation
1
1
Fan only operation
The indoor unit will stop fan operation, the refrigerant cycle will
reverse and energy from inside the building will be used to defrost
the heat exchanger unit coil.
The indoor unit will indicate defrost operation on the displays
.
1
During defrost operation, ice melts and possibly evaporates.
Possible consequence: Mist might be visible during or directly after
defrost operation. This is not a malfunction.
1
Hot start
In order to prevent cold air from blowing out of an indoor unit at the
start of heating operation, the indoor fan is automatically stopped.
The display of the user interface shows
. It may take some
time before the fan starts. This is not a malfunction.
2
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.
1
Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.
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.
17.2.4
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
Fan only operation
Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.
17.2.5
To adjust
For programming temperature, fan speed and air flow direction refer
to the operation manual of the user interface.
17.3
Using the dry program
17.3.1
About the dry program
▪ The function of this program is to decrease the humidity in your
room with minimal temperature decrease (minimal room cooling).
▪ The micro computer automatically determines temperature and
fan speed (cannot be set by the user interface).
Heating operation
2
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
To operate the system (WITH cool/heat
changeover remote control switch)
▪ The system does not go into operation if the room temperature is
low (<20°C).
17.3.2
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.
Overview of the changeover remote control switch
a
a
FAN ONLY/AIR CONDITIONING
SELECTOR SWITCH
Set the switch to
for fan only
operation or to
for heating or
cooling operation.
b
b
COOL/HEAT CHANGEOVER SWITCH
Set the switch to
for heating
Installer and user reference guide
54
for cooling or to
To use the dry program (WITHOUT cool/
heat changeover remote control switch)
Result: The operation lamp lights up and the system starts
operating.
3
Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to "17.4 Adjusting the air flow direction" on page 55 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.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
17 Operation
Cooling
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
17.3.3
To use the dry program (WITH cool/heat
changeover remote control switch)
▪ 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:
To start
1
Heating
▪ When operating continuously at horizontal air flow direction.
Select cooling operation mode with the cool/heat changeover
remote control switch.
▪ The air flow flap itself adjusts its position.
▪ The air flow direction can be fixed by the user.
▪ Automatic
1
and desired position
.
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.
1
NOTICE
2
Press the operation mode selector button on the user interface
several times and select
(program dry operation).
3
Press the ON/OFF button of the user interface.
▪ 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.
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 "17.4 Adjusting the air flow direction" on page 55 for details.
To stop
5
17.5
Setting the master user interface
17.5.1
About setting the master user interface
Press the ON/OFF button on the user interface once again.
1
a
Result: The operation lamp goes out and the system stops
operating.
c
c
VRV DX
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
17.4
b
1
2
Adjusting the air flow direction
a
b
c
d
VRV DX
EKEXV
AHU
Refer to the operation manual of the user interface.
17.4.1
About the air flow flap
Double flow+multi-flow units
2
VRV DX
VRV DX
EKEXV
AHU
d
d
d
d
In case of VRV DX indoor units
In case of VRV DX indoor units combined with an air
handling unit
Heat exchanger unit
Compressor unit
Refrigerant piping
User interface (dedicated depending on indoor unit type)
VRV direct expansion (DX) indoor unit
Expansion valve kit
Air handling unit
When the system is installed as shown in the figure above, it is
necessary to designate one of the user interfaces as the master user
interface.
Corner units
Ceiling suspended units
Wall-mounted units
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.
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
Cooling
Heating
17.5.2
1
▪ When the room temperature is ▪ When starting operation.
lower
than
the
set
▪ When the room temperature is
temperature.
higher
than
the
set
temperature.
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 compressor unit flashes.
▪ At defrost operation.
2
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
To designate the master user interface
(VRV DX)
Press the operation mode selector button of the controller that
you wish to designate as the master user interface.
Installer and user reference guide
55
18 Energy saving and optimum operation
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).
17.5.3
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
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.
Contact your dealer in case of changing the combination or
setting of group control and two user interface control
systems.
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.)
▪ 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 compressor unit, heat exchanger unit, 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.
Installer and user reference guide
56
Several patterns are available and roughly explained below. Contact
your installer or dealer for advice or to modify the parameters to the
needs of your building.
Detailed information is given for the installer in the installation
manual. He can help you to realize the best balance between energy
consumption and comfort.
18.1
Available main operation methods
Basic
The refrigerant temperature is fixed independent from the situation. It
corresponds to the standard operation which is known and can be
expected from/under previous VRV systems.
Automatic
NOTICE
18
This heat pump system is equipped with advanced energy saving
functionality. Depending on the priority, emphasises can be put on
energy saving or comfort level. Several parameters can be selected,
resulting in the optimal balance between energy consumption and
comfort for the particular application.
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.
Hi-sensible/economic (cooling/heating)
The refrigerant temperature is set higher/lower (cooling/heating)
compared to basic operation. The focus under high sensible mode is
comfort feeling for the customer.
The selection method of indoor units is important and has to be
considered as the available capacity is not the same as under basic
operation.
For details concerning to Hi-sensible applications, please contact
your installer.
18.2
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
▪ Quick
▪ Mild
▪ Eco
19
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.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
19 Maintenance and service
CAUTION
NOTICE
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.
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.
CAUTION
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
Pay attention to the fan.
It is dangerous to inspect the unit while the fan is running.
Be sure to turn off the main switch before executing any
maintenance task.
Please contact your installer for more information.
CAUTION
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.
WARNING
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
NOTICE
Do not wipe the controller operation panel with benzine,
thinner, chemical dust cloth, etc. The panel may get
discoloured or the coating peeled off. If it is heavily dirty,
soak a cloth in water-diluted neutral detergent, squeeze it
well and wipe the panel clean. Wipe it with another dry
cloth.
19.1
Maintenance after a long stop
period
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.
19.4
After-sales service and warranty
19.4.1
Warranty period
E.g., at the beginning of the season.
▪ 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.
▪ Check and remove everything that might be blocking inlet and
outlet vents of indoor units and heat exchanger unit.
▪ If repairs to the product are necessary within the warranty period,
contact your dealer and keep the warranty card at hand.
▪ Clean air filters and casings of indoor units and heat exchanger
unit. Contact your installer or maintenance person to clean the air
filters and casings of the indoor units and the heat exchanger unit.
Maintenance tips and procedures for cleaning are provided in the
installation/operation manuals of dedicated indoor units. Make
sure to install cleaned air filters back in the same position.
▪ Turn on the power at least 6 hours before operating the unit in
order to ensure smoother operation. As soon as the power is
turned on, the user interface display appears.
19.2
Maintenance before a long stop
period
E.g., at the end of the season.
▪ Let the indoor units run in fan only operation for about half a day in
order to dry the interior of the units. Refer to "17.2.2 About
cooling, heating, fan only, and automatic operation" on page 53
for details on fan only operation.
19.4.2
Recommended maintenance and
inspection
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.
▪ Turn off the power. The user interface display disappears.
▪ Clean air filters and casings of indoor units and heat exchanger
unit. Contact your installer or maintenance person to clean the air
filters and casings of the indoor units and the heat exchanger unit.
Maintenance tips and procedures for cleaning are provided in the
installation/operation manuals of dedicated indoor units. Make
sure to install cleaned air filters back in the same position.
19.3
About the refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R410A
WARNING
▪ Do not modify, disassemble, remove, reinstall or repair
the unit yourself as incorrect dismantling or installation
may cause an electric shock or fire. Contact your
dealer.
▪ In case of accidental refrigerant leaks, make sure there
are no naked flames. The refrigerant itself is entirely
safe, non-toxic and non-combustible, but it will
generate toxic gas when it accidentally leaks into a
room where combustible air from fan heaters, gas
cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been
repaired or corrected before resuming operation.
Global warming potential (GWP) value: 2087.5
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
57
20 Troubleshooting
19.4.3
Recommended maintenance and
inspection cycles
NOTICE
▪ The table indicates main components. Refer to your
maintenance and inspection contract for more details.
Be aware that the mentioned maintenance and replacement cycles
do not relate to the warranty period of the components.
Component
Electric motor
Inspection
cycle
Maintenance cycle
(replacements and/or
repairs)
1 year
20,000 hours
PCB
▪ 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
INFORMATION
Sensor (thermistor, etc.)
5 years
Damage due to taking apart or cleaning interiors of units by
anyone other than our authorised dealers may not be
included in the warranty.
User interface and switches
25,000 hours
Drain pan
8 years
Expansion valve
20,000 hours
Solenoid valve
20,000 hours
The table assumes the following conditions of use:
▪ Normal use without frequent starting and stopping of the unit.
Depending on the model, we recommend not starting and
stopping the machine more than 6 times/hour.
▪ Operation of the unit is assumed to be 10 hours/day and
2,500 hours/year.
NOTICE
▪ The table indicates main components. Refer to your
maintenance and inspection contract for more details.
▪ The table indicates recommended intervals of
maintenance cycles. However, in order to keep the unit
operational as long as possible, maintenance work may
be required sooner. Recommended intervals can be
used for appropriate maintenance design in terms of
budgeting
maintenance
and
inspection
fees.
Depending on the content of the maintenance and
inspection contract, inspection and maintenance cycles
may in reality be shorter than listed.
19.4.4
Shortened maintenance and replacement
cycles
Shortening of "maintenance cycle" and "replacement cycle" needs to
be considered in following situations:
The unit is used in locations where:
20
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.
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.
▪ 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
Component
Air filter
High efficiency filter
Fuse
Pressure containing parts
Installer and user reference guide
58
Inspection
cycle
Maintenance cycle
(replacements and/or
repairs)
1 year
5 years
1 year
10 years
In case of corrosion,
contact your local dealer.
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 heat
fan only operation, but
exchanger unit or indoor unit is not
as soon as it goes into
blocked by obstacles. Remove any
heating or cooling
obstacle and make it well-ventilated.
operation, the system
▪ Check if the user interface display shows
stops.
(time to clean the air filter). (Refer to
"19 Maintenance and service" on
page 56 and "Maintenance" in the indoor
unit manual.)
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
20 Troubleshooting
Malfunction
The system operates
but cooling or heating
is insufficient.
Measure
▪ Check if air inlet or outlet of heat
exchanger unit or indoor unit is not
blocked by obstacles. Remove any
obstacle and make it well-ventilated.
▪ Check if the air filter is not clogged (refer
to "Maintenance" in the indoor unit
manual).
▪ Check the temperature setting.
▪ Check the fan speed setting on your user
interface.
▪ Check for open doors or windows. Shut
doors and windows to prevent wind from
coming in.
Contents
Compressor lock detection (compressor unit)
Electronic expansion valve malfunction (compressor
unit or heat exchanger unit)
Discharge temperature malfunction (compressor unit)
Abnormal suction temperature (compressor unit)
Refrigerant overcharge detection
High pressure switch malfunction
Low pressure switch malfunction
Ambient temperature sensor malfunction (heat
exchanger unit)
Pressure sensor malfunction
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.
Discharge temperature sensor malfunction
(compressor unit)
▪ Check if direct sunlight enters the room.
Use curtains or blinds.
Suction temperature sensor malfunction (compressor
unit)
▪ Check if the air flow angle is proper.
De-icing temperature sensor malfunction (heat
exchanger unit)
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).
20.1
Main code
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
Heat exchanger gas temperature sensor malfunction
(heat exchanger unit)
Liquid temperature sensor (after subcool HE)
malfunction (compressor unit)
Gas temperature sensor (after subcool HE)
malfunction (compressor unit)
High pressure sensor malfunction (BIPH)
Low pressure sensor malfunction (BIPL)
INV PCB abnormal
Fin temperature abnormal
Inverter PCB faulty
Compressor over current detected
Compressor lock (startup)
Transmission compressor unit - inverter: INV
transmission trouble
External protection device was activated
INV unbalanced power supply voltage
EEPROM failure (indoor)
Fin thermistor malfunction
Drain system malfunction (indoor)
Heat exchanger unit capacity setting malfunction.
Fan motor malfunction (indoor)
Abnormal low pressure drop, faulty expansion valve
Swing flap motor malfunction (indoor)
Reversed power supply phase malfunction
Expansion valve malfunction (indoor)
INV voltage power shortage
Drain malfunction (indoor unit)
System test run not yet executed
Filter dust chamber malfunction (indoor)
Faulty wiring indoor/heat exchanger unit/compressor
unit
Capacity setting malfunction (indoor)
Transmission malfunction between main PCB and sub
PCB (indoor)
Heat exchanger thermistor malfunction (indoor; liquid)
Heat exchanger thermistor malfunction (indoor; gas)
Suction air thermistor malfunction (indoor)
Discharge air thermistor malfunction (indoor)
Movement detector or floor temperature sensor
malfunction (indoor)
User interface thermistor malfunction (indoor)
Abnormal user interface - indoor communication
Abnormal main-sub user interface communication
System mismatch. Wrong type of indoor units
combined. Indoor unit malfunction. Heat exchanger
unit malfunction.
Connection malfunction over indoor units or type
mismatch (wrong type of indoor units or heat
exchanger unit)
Centralised address duplication
Fan or drain pump malfunction (heat exchanger unit)
Malfunction in communication centralised control
device - indoor unit
PCB malfunction (compressor unit)
Auto address malfunction (inconsistency)
Current leakage detector was activated (compressor
unit)
Auto address malfunction (inconsistency)
High pressure switch was activated
Low pressure malfunction (compressor unit)
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
59
20 Troubleshooting
20.2
Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
20.2.1
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.
20.2.2
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.
20.2.3
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.
20.2.4
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 compressor unit goes
off and the indoor unit changes to whisper fan speed. This is to
prevent cold air blowing directly on occupants of the room. The fan
speed will not change even when another indoor unit is in heating
operation, if the button is pressed.
20.2.5
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.
20.2.6
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.
Installer and user reference guide
60
▪ Immediately after the cooling operation stops and if the room
temperature and humidity are low. This is because warm
refrigerant gas flows back into the indoor unit and generates
steam.
20.2.7
Symptom: White mist comes out of a unit
(Indoor unit, heat exchanger unit)
When the system is changed over to heating operation after defrost
operation. Moisture generated by defrost becomes steam and is
exhausted.
20.2.8
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.
20.2.9
Symptom: Noise of air conditioners
(Indoor unit, heat exchanger 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.
20.2.10 Symptom: Noise of air conditioners
(Indoor unit, compressor unit, heat
exchanger 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 the compressor unit, heat exchanger unit and
indoor units.
▪ A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation. This is the noise of
refrigerant caused by flow stop or flow change.
20.2.11 Symptom: Noise of air conditioners
(compressor unit, heat exchanger unit)
When the tone of operating noise changes. This noise is caused by
the change of frequency from the compressor or the fans.
20.2.12 Symptom: Dust comes out of the heat
exchanger unit
When the unit is used for the first time in a long time. This is
because dust has gotten into the heat exchanger unit.
20.2.13 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emit it again.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
21 Relocation
20.2.14 Symptom: The heat exchanger unit fan
does not spin
During operation. The speed of the fan is controlled in order to
optimise product operation.
20.2.15 Symptom: The display shows "88"
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.
20.2.16 Symptom: The compressor in the
compressor unit does not stop after a
short heating operation
This is to prevent refrigerant from remaining in the compressor. The
unit will stop after 5 to 10 minutes.
20.2.17 Symptom: The inside of an compressor
unit is warm even when the unit has
stopped
Installation manual
Instruction manual specified for a certain product or
application, explaining how to install, configure and maintain
it.
Operation manual
Instruction manual specified for a certain product or
application, explaining how to operate it.
Accessories
Labels, manuals, information sheets and equipment that are
delivered with the product and that need to be installed
according to the instructions in the accompanying
documentation.
Optional equipment
Equipment made or approved by Daikin that can be
combined with the product according to the instructions in
the accompanying documentation.
Field supply
Equipment not made by Daikin that can be combined with
the product according to the instructions in the
accompanying documentation.
This is because the crankcase heater is warming the compressor so
that the compressor can start smoothly.
20.2.18 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.
21
Relocation
Contact your dealer for removing and reinstalling the total unit.
Moving units requires technical expertise.
22
Disposal
This unit uses hydrofluorocarbon. Contact your dealer when
discarding this unit. It is required by law to collect, transport and
discard the refrigerant in accordance with the "hydrofluorocarbon
collection and destruction" regulations.
23
Glossary
Dealer
Sales distributor for the product.
Authorized installer
Technical skilled person who is qualified to install the
product.
User
Person who is owner of the product and/or operates the
product.
Applicable legislation
All international, European, national and local directives,
laws, regulations and/or codes that are relevant and
applicable for a certain product or domain.
Service company
Qualified company which can perform or coordinate the
required service to the product.
RKXYQ5+8T7Y1B + RDXYQ5+8T7V1B*
VRV IV heat pump for indoor installation
4P408445-1A – 2016.04
Installer and user reference guide
61
4P408445-1A 2016.04
Copyright 2015 Daikin
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