Daikin VRV 5 RXYA8A7Y1B User manual
Installation and operation manual
VRV 5 heat pump English
Installation and operation manual
VRV 5 heat pump
RXYA8A7Y1B
RXYA10A7Y1B
RXYA12A7Y1B
RXYA14A7Y1B
RXYA16A7Y1B
RXYA18A7Y1B
RXYA20A7Y1B
RYMA5A7Y1B
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
5 25 30 35 40 45 50 55 60 65201510 70 75 80
No safety measure (c)
NOT allowed (e)
m[kg]
Amin [m2]
0
5 25 30 35 40 45 50 55 60 65201510 70 75 80
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
No safety measure
(c)
m[kg]
Lowest underground floor (a) All other floors (b)
Amin [m2]
Alarm OR
Natural ventilation
(d)
Alarm + shut-off valve [SV unit]
OR
Alarm + natural ventilation (f)
m[kg]
Amin [m²]
Lowest underground floor (a)
No safety measure (c) No safety measure (c)
Alarm OR
Natural Ventilation (d)
m[kg]
Amin [m²]
All other floors (b) Lowest underground floor (a) All other floors (b)
No safety measure (c) No safety measure (c)
Alarm OR
Natural Ventilation (d)
5 15 10 10 43 128 85 85
6 18 12 12 131 87 87
7 21 14 14
44
134 89 89
8 24 16 16
45
137 91 91
9 27 18 18
46
140 93 93
10 30 20 20
47
143 95 95
11 33 22 22
48
146 97 97
12 36 24 24
49
149 99 99
13 39 26 26
50
152 101 101
14 42 28 28
51
154 103 103
15 45 30 30
52
157 105 105
16 48 32 32
53
160 107 107
17 51 34 34
54
163 109 109
18 54 36 36
55
166 111 111
19 57 38 38
56
169 113 113
20 60 40 40
57
172 115 115
21 63 42 42
58
175 117 117
22 66 44 44
59
178 119 119
23 69 46 46
60
181 121 121
24 72 48 48
61
184 123 123
25 75 50 50
62
187 125 125
26 77 52 52
63
190 127 127
27 80 54 54
64
193 129 129
28 83 56 56
65
196 131 131
29 86 58 58
66
199 133 133
30 89 60 60
67
202 135 135
31 92 62 62
68
205 137 137
32 95 64 64
69
208 139 139
33 98 66 66
70
211 141 141
34 101 68 68
71
143214 143
35 104 70 70
72
217 145 145
36 107 72 72
73
220 147 147
37 110 74 74
74
223 149 149
38 113 76 76
75
226 151 151
39 116 77 77
76
229 153 153
40 119 79 79
77
231 154 154
41 122 81 81
78
234 156 156
42 125 83 83
79
80 237 158 158
1
Table of contents
Installation and operation manual
3
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
Table of contents
1 About this document 4
2 Specific installer safety instructions 4
2.1 Instructions for equipment using R32 refrigerant ...................... 7
For the user 7
3 User safety instructions 7
3.1 General...................................................................................... 7
3.2 Instructions for safe operation ................................................... 8
4 About the system 10
4.1 System layout............................................................................ 10
5 User interface 11
6 Operation 11
6.1 Operation range ........................................................................ 11
6.2 Operating the system ................................................................ 11
6.2.1 About operating the system ........................................ 11
6.2.2 About cooling, heating, fan only, and automatic
operation ..................................................................... 11
6.2.3 About the heating operation........................................ 11
6.2.4 To operate the system (WITHOUT cool/heat
changeover remote control switch) ............................. 12
6.2.5 To operate the system (WITH cool/heat changeover
remote control switch)................................................. 12
6.3 Using the dry program ............................................................... 12
6.3.1 About the dry program ................................................ 12
6.3.2 To use the dry program (WITHOUT cool/heat
changeover remote control switch) ............................. 12
6.3.3 To use the dry program (WITH cool/heat changeover
remote control switch)................................................. 12
6.4 Adjusting the air flow direction................................................... 13
6.4.1 About the air flow flap ................................................. 13
6.5 Setting the master user interface .............................................. 13
6.5.1 About setting the master user interface ...................... 13
6.5.2 To designate the master user interface ...................... 13
7 Maintenance and service 14
7.1 Precautions for maintenance and service ................................. 14
7.2 About the refrigerant.................................................................. 14
7.3 After-sales service ..................................................................... 14
7.3.1 Recommended maintenance and inspection.............. 14
8 Troubleshooting 14
8.1 Error codes: Overview ............................................................... 15
8.2 Symptoms that are NOT system malfunctions .......................... 16
8.2.1 Symptom: The system does not operate .................... 16
8.2.2 Symptom: Cool/Heat cannot be changed over ........... 16
8.2.3 Symptom: Fan operation is possible, but cooling and
heating do not work..................................................... 16
8.2.4 Symptom: The fan speed does not correspond to the
setting ......................................................................... 16
8.2.5 Symptom: The fan direction does not correspond to
the setting ................................................................... 16
8.2.6 Symptom: White mist comes out of a unit (Indoor
unit) ............................................................................. 16
8.2.7 Symptom: White mist comes out of a unit (Indoor
unit, outdoor unit) ........................................................ 16
8.2.8 Symptom: The user interface reads "U4" or "U5" and
stops, but then restarts after a few minutes ................ 16
8.2.9 Symptom: Noise of air conditioners (Indoor unit)........ 16
8.2.10 Symptom: Noise of air conditioners (Indoor unit,
outdoor unit)................................................................ 16
8.2.11 Symptom: Noise of air conditioners (Outdoor unit) ..... 17
8.2.12 Symptom: Dust comes out of the unit ......................... 17
8.2.13 Symptom: The units can give off odours..................... 17
8.2.14 Symptom: The outdoor unit fan does not spin ............. 17
8.2.15 Symptom: The display shows "88"............................... 17
8.2.16 Symptom: The compressor in the outdoor unit does
not stop after a short heating operation ....................... 17
8.2.17 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped .................................. 17
8.2.18 Symptom: Hot air can be felt when the indoor unit is
stopped ........................................................................ 17
9 Relocation 17
10 Disposal 17
For the installer 17
11 About the box 17
11.1 To remove the accessories from the outdoor unit ...................... 17
11.2 Accessory pipes: Diameters ....................................................... 17
11.3 To remove the transportation stay (only for 5~12 HP) ............... 18
12 About the units and options 18
12.1 About the outdoor unit ................................................................ 18
12.2 System layout ............................................................................. 18
13 Special requirements for R32 units 19
13.1 Installation space requirements.................................................. 19
13.2 System layout requirements ....................................................... 19
13.3 To determine the required safety measures............................... 21
13.3.1 Overview: flowchart...................................................... 22
13.4 Safety measures ........................................................................ 22
13.4.1 No safety measure....................................................... 22
13.4.2 Alarm............................................................................ 22
13.4.3 Natural ventilation ........................................................ 23
13.4.4 Shut-off valves ............................................................. 24
13.4.5 Overview: flowchart...................................................... 26
13.5 Combinations of safety measures .............................................. 27
14 Unit installation 27
14.1 Preparing the installation site ..................................................... 27
14.1.1 Installation site requirements of the outdoor unit ......... 27
14.1.2 Additional installation site requirements of the
outdoor unit in cold climates ........................................ 27
14.2 Opening the unit ......................................................................... 28
14.2.1 To open the outdoor unit.............................................. 28
14.2.2 To open the switch box of the outdoor unit .................. 28
14.3 Mounting the outdoor unit........................................................... 28
14.3.1 To provide the installation structure ............................. 28
14.3.2 To install the outdoor unit............................................. 29
15 Piping installation 29
15.1 Preparing refrigerant piping ........................................................ 29
15.1.1 Refrigerant piping requirements................................... 29
15.1.2 Refrigerant piping material........................................... 29
15.1.3 To select the piping size .............................................. 29
15.1.4 To select refrigerant branch kits................................... 30
15.1.5 Installation limitations................................................... 31
15.1.6 Multiple outdoor units: Possible layouts....................... 31
15.2 Connecting the refrigerant piping ............................................... 32
15.2.1 Using the stop valve and service port .......................... 32
15.2.2 To route the refrigerant piping...................................... 32
15.2.3 To protect against contamination................................. 33
15.2.4 To remove the pinched pipes....................................... 33
15.2.5 To connect the refrigerant piping to the outdoor unit ... 33
15.2.6 To connect the multi connection piping kit ................... 33
15.2.7 To connect the refrigerant branching kit ...................... 34
15.3 Checking the refrigerant piping .................................................. 34
15.3.1 About checking the refrigerant piping .......................... 34
15.3.2 Checking refrigerant piping: General guidelines .......... 34
15.3.3 Checking refrigerant piping: Setup............................... 35
15.3.4 To perform a leak test .................................................. 35
15.3.5 To perform vacuum drying ........................................... 35
1 About this document
Installation and operation manual
4
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
15.3.6 To insulate the refrigerant piping ................................ 35
15.3.7 To check for leaks after charging refrigerant .............. 36
16 Charging refrigerant 36
16.1 Precautions when charging refrigerant...................................... 36
16.2 About charging refrigerant......................................................... 37
16.3 To determine the additional refrigerant amount ........................ 37
16.4 To charge refrigerant: Flow chart .............................................. 38
16.5 To charge refrigerant................................................................. 38
16.6 Error codes when charging refrigerant ...................................... 39
16.7 Checks after charging refrigerant .............................................. 39
16.8 To fix the fluorinated greenhouse gases label........................... 40
16.9 To check refrigerant piping joints for leaks after charging
refrigerant .................................................................................. 40
17 Electrical installation 40
17.1 About electrical compliance....................................................... 40
17.2 Specifications of standard wiring components .......................... 41
17.3 Connecting the electrical wiring................................................. 41
17.4 To route and fix the interconnection wiring................................ 42
17.5 To connect the interconnection wiring....................................... 42
17.6 To finish the interconnection wiring ........................................... 43
17.7 To route and fix the power supply ............................................. 43
17.8 To connect the power supply .................................................... 43
17.9 To connect the external outputs ................................................ 44
17.10 To check the insulation resistance of the compressor .............. 44
18 Configuration 45
18.1 Making field settings .................................................................. 45
18.1.1 About making field settings ......................................... 45
18.1.2 Field setting components ............................................ 45
18.1.3 To access the field setting components...................... 45
18.1.4 To access mode 1 or 2 ............................................... 46
18.1.5 To use mode 1 ............................................................ 46
18.1.6 To use mode 2 ............................................................ 46
18.1.7 Mode 1: monitoring settings........................................ 46
18.1.8 Mode 2: field settings .................................................. 47
18.1.9 Indoor unit field setting................................................ 48
18.2 Using the leak detection function .............................................. 49
18.2.1 About automatic leak detection................................... 49
18.2.2 To manually perform a leak detection......................... 49
19 Commissioning 49
19.1 Precautions when commissioning ............................................. 49
19.2 Checklist before commissioning ................................................ 50
19.3 Checklist during commissioning ................................................ 50
19.4 About the SV unit test run ......................................................... 50
19.5 About the system test run.......................................................... 50
19.5.1 To perform a test run .................................................. 51
19.5.2 Correcting after abnormal completion of the test run.. 51
19.6 To perform a SV/indoor unit connection check ......................... 51
20 Hand-over to the user 52
21 Maintenance and service 52
21.1 Maintenance safety precautions................................................ 52
21.1.1 To prevent electrical hazards...................................... 52
21.2 Checklist for yearly maintenance of the outdoor unit ................ 53
21.3 About service mode operation................................................... 53
21.3.1 To use vacuum mode ................................................. 53
21.3.2 To recover refrigerant ................................................. 53
21.3.3 Before the maintenance and service of a system with
SV unit ........................................................................ 53
21.4 SV unit maintenance and service label ..................................... 53
22 Troubleshooting 53
22.1 Solving problems based on error codes.................................... 53
22.1.1 Error codes: Overview ................................................ 54
22.2 Refrigerant leak detection system ............................................. 58
23 Disposal 58
24 Technical data 59
24.1 Service space: Outdoor unit ....................................................... 59
24.2 Piping diagram: Outdoor unit...................................................... 60
24.3 Wiring diagram: Outdoor unit ..................................................... 62
25 Glossary 63
1 About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set
consists of:
▪General safety precautions:
▪ Safety instructions that you must read before installing
▪ Format: paper (in the box of the outdoor unit)
▪Outdoor unit installation and operation manual:
▪ Installation and operation instructions
▪ Format: paper (in the box of the outdoor unit)
▪Installer and user reference guide:
▪ Preparation of the installation, reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ Format: Digital files on https://www.daikin.eu. Use the search
function to find your model.
The latest revision of the supplied documentation is published on the
regional Daikin website and is available via your dealer.
The original instructions are written in English. All other languages
are translations of the original instructions.
2 Specific installer safety
instructions
Always observe the following safety instructions and regulations.
Installation site (see "14.1Preparing the installation
site"[427])
WARNING
Follow the service space dimensions in this manual to
install the unit correctly. See "24.1Service space: Outdoor
unit"[459].
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially NOT children, can play with them.
Possible consequence: suffocation.
CAUTION
Appliance NOT accessible to the general public, install it in
a secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
2 Specific installer safety instructions
Installation and operation manual
5
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
CAUTION
This equipment is NOT intended for use in residential
locations and will NOT guarantee to provide adequate
protection to radio reception in such locations.
CAUTION
Excessive refrigerant concentrations in a closed room can
lead to oxygen deficiency.
WARNING
If the appliance contains R32 refrigerant, the floor area of
the room in which the appliance is stored shall be at least
956m².
WARNING
If one or more rooms are connected to the unit using a
duct system, make sure:
▪ there are no operating ignition sources (example: open
flames, an operating gas appliance or an operating
electric heater) in case the floor area is less than the
minimum floor area A (m²).
▪ no auxiliary devices, which may be a potential ignition
source, are installed in the duct work (example: hot
surfaces with a temperature exceeding 700°C and
electric switching device);
▪ only auxiliary devices approved by the manufacturer
are used in the duct work;
▪ air inlet AND outlet are connected directly to the same
room by ducting. Do NOT use spaces such as a false
ceiling as a duct for the air inlet or outlet.
Opening the unit (see "14.2Opening the unit"[428])
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
Mounting the outdoor unit (see "14.3Mounting the outdoor
unit"[428])
WARNING
Fixing method of the outdoor unit MUST be in accordance
with the instructions from this manual. See "14.3Mounting
the outdoor unit"[428].
Connecting the refrigerant piping (see "15.2Connecting the
refrigerant piping"[432])
WARNING
Field piping MUST be in accordance with the instructions
from this manual. See "15Piping installation"[429].
CAUTION
Piping MUST be installed according to instructions given in
"15 Piping installation" [4 29]. Only mechanical joints (e.g.
braze+flare connections) that are compliant with the latest
version of ISO14903 can be used.
Low temperature solder alloys shall not be used for pipe
connections.
CAUTION
▪ Do NOT use mineral oil on flared part.
▪ Do NOT reuse piping from previous installations.
▪ NEVER install a drier to this unit to guarantee its
lifetime. The drying material may dissolve and damage
the system.
CAUTION
Install the refrigerant piping or components in a position
where they are unlikely to be exposed to any substance
which may corrode components containing refrigerant,
unless the components are constructed of materials that
are inherently resistant to corrosion or are suitably
protected against corrosion.
WARNING
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ Toxic gas might be produced if refrigerant gas comes
into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
WARNING
During tests, NEVER pressurise the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).
CAUTION
Do NOT vent gases into the atmosphere.
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
WARNING
NEVER remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
2 Specific installer safety instructions
Installation and operation manual
6
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
Charging refrigerant (see "16Charging refrigerant"[436])
WARNING
▪ The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the
formation of a harmful gas.
▪ Turn OFF any combustible heating devices, ventilate
the room, and contact the dealer where you purchased
the unit.
▪ Do NOT use the unit until a service person confirms
that the part from which the refrigerant leaked has been
repaired.
WARNING
Charging of refrigerant MUST be in accordance with the
instructions from this manual. See "16 Charging
refrigerant"[436].
WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
Electrical installation (see "17Electrical installation"[440])
WARNING
Electrical wiring MUST be in accordance with the
instructions from:
▪ This manual. See "17Electrical installation"[440].
▪ The wiring diagram, which is delivered with the unit,
located at the inside of the service cover. For a
translation of its legend, see "24.3 Wiring diagram:
Outdoor unit"[462].
WARNING
The appliance MUST be installed in accordance with
national wiring regulations.
CAUTION
Do NOT push or place redundant cable length into the unit.
WARNING
▪ If the power supply has a missing or wrong N-phase,
equipment might break down.
▪ Establish proper earthing. Do NOT earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shocks.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, extension cords, or
connections from a star system. They can cause
overheating, electrical shocks or fire.
▪ Do NOT install a phase advancing capacitor, because
this unit is equipped with an inverter. A phase
advancing capacitor will reduce performance and may
cause accidents.
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the national wiring
regulation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST comply with the applicable
legislation.
WARNING
The electrical components shall only be replaced with parts
specified by the appliance manufacturer. Replacement with
other parts may result in the ignition of refrigerant in the
event of a leak.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
WARNING
ALWAYS use multicore cable for power supply cables.
CAUTION
▪ When connecting the power supply: connect the earth
cable first, before making the current-carrying
connections.
▪ When disconnecting the power supply: disconnect the
current-carrying cables first, before separating the earth
connection.
▪ The length of the conductors between the power supply
stress relief and the terminal block itself MUST be as
such that the current-carrying wires are tautened before
the earth wire is in case the power supply is pulled
loose from the stress relief.
Commissioning (see "19Commissioning"[449])
WARNING
Commissioning MUST be in accordance with the
instructions from this manual. See
"19Commissioning"[449].
CAUTION
Do NOT perform the test operation while working on
the indoor units.
When performing the test operation, NOT ONLY the
outdoor unit, but the connected indoor unit will operate as
well. Working on an indoor unit while performing a test
operation is dangerous.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. Do NOT remove the fan guard. When the
fan is rotating at high speed, it will cause injury.
3 User safety instructions
Installation and operation manual
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RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
Troubleshooting (see "22Troubleshooting"[453])
WARNING
▪ When carrying out an inspection on the switch box of
the unit, ALWAYS make sure that the unit is
disconnected from the mains. Turn off the respective
circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
2.1 Instructions for equipment using
R32 refrigerant
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Do NOT use cleaning materials or means to accelerate
the defrosting process other than those recommended
by the manufacturer.
▪ Be aware that the refrigerant inside the system is
odourless.
WARNING
The appliance shall be stored as follows:
▪ in such a way as to prevent mechanical damage.
▪ in a well-ventilated room without continuously operating
ignition sources (example: open flames, an operating
gas appliance or an operating electric heater).
▪ in a room with dimensions as specified in "13 Special
requirements for R32 units"[419].
WARNING
Make sure installation, servicing, maintenance and repair
comply with instructions from Daikin and with applicable
legislation (for example national gas regulation) and are
executed ONLY by authorised persons.
WARNING
▪ Take precautions to avoid excessive vibration or
pulsation to refrigeration piping.
▪ Protect the protection devices, piping and fittings as
much as possible against adverse environmental
effects.
▪ Provide space for expansion and contraction of long
runs of piping.
▪ Design and install piping in refrigerating systems such
as to minimise the likelihood of hydraulic shock
damaging the system.
▪ Mount the indoor equipment and pipes securely and
protect them to avoid accidental rupture of equipment
or pipes in case of events such as moving furniture or
reconstruction activities.
CAUTION
Do NOT use potential sources of ignition in searching for
or detection of refrigerant leaks.
NOTICE
▪ Do NOT re-use joints and copper gaskets which have
been used already.
▪ Joints made in the installation between parts of the
refrigerant system shall be accessible for maintenance
purposes.
See "To determine the charge limit" [4 24] to check if your system
meets the requirement for charge limitation.
For the user
3 User safety instructions
Always observe the following safety instructions and regulations.
3.1 General
WARNING
If you are NOT sure how to operate the
unit, contact your installer.
WARNING
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
3 User safety instructions
Installation and operation manual
8
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
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 electrical shocks or fire:
▪ Do NOT rinse the unit.
▪ Do NOT operate the unit with wet
hands.
▪ Do NOT place any objects containing
water on the unit.
CAUTION
▪ Do NOT place any objects or
equipment on top of the unit.
▪ Do NOT sit, climb or stand on the
unit.
▪ Units are marked with the following symbol:
This means that electrical and electronic products may NOT be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: dismantling the system, treatment of the
refrigerant, of oil and of other parts MUST be done by an
authorised installer and MUST comply with applicable legislation.
Units MUST be treated at a specialised treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health. For more information,
contact your installer or local authority.
▪ Batteries are marked with the following symbol:
This means that the batteries may NOT be mixed with unsorted
household waste. If a chemical symbol is printed beneath the
symbol, this chemical symbol means that the battery contains a
heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries MUST be treated at a specialised 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.
3.2 Instructions for safe operation
WARNING
Make sure installation, servicing,
maintenance, repair and applied
materials follow the instructions from
Daikin (including all documents listed in
“Documentation set”) and, in addition,
comply with applicable legislation and
are performed by qualified persons
only. In Europe and areas where IEC
standards apply, EN/IEC 60335-2-40 is
the applicable standard.
WARNING
Do NOT install operating ignition
sources (example: open flames, an
operating gas appliance or an
operating electric heater) in the
ductwork.
CAUTION
▪ NEVER touch the internal parts of the
controller.
▪ Do NOT remove the front panel.
Some parts inside are dangerous to
touch and appliance problems may
happen. For checking and adjusting
the internal parts, contact your
dealer.
CAUTION
Do NOT operate the system when
using a room fumigation-type
insecticide. Chemicals could collect in
the unit, and endanger the health of
people who are hypersensitive to
chemicals.
CAUTION
It is unhealthy to expose your body to
the air flow for a long time.
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.
3 User safety instructions
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Maintenance and service (see "7Maintenance and
service"[414])
WARNING
The unit is equipped with a refrigerant
leak detection system for safety.
To be effective, the unit MUST be
electrically powered at all times after
installation, except for maintenance.
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.
WARNING
If the supply cord is damaged, it MUST
be replaced by the manufacturer, its
service agent or similarly qualified
persons in order to avoid a hazard.
CAUTION
Do NOT insert fingers, rods or other
objects into the air inlet or outlet. Do
NOT remove the fan guard. When the
fan is rotating at high speed, it will
cause injury.
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while
the fan is running.
Make sure to turn OFF the main switch
before executing any maintenance
task.
CAUTION
After a long use, check the unit stand
and fitting for damage. If damaged, the
unit may fall and result in injury.
About the refrigerant (see "7.2About the refrigerant"[414])
WARNING: MILDLY FLAMMABLE
MATERIAL
The refrigerant inside this unit is
mildly flammable.
WARNING
▪ The refrigerant inside the unit is
mildly flammable, but normally does
NOT leak. If the refrigerant leaks in
the room and comes in contact with
fire from a burner, a heater, or a
cooker, this may result in fire, or the
formation of a harmful gas.
▪ Turn OFF any combustible heating
devices, ventilate the room, and
contact the dealer where you
purchased the unit.
▪ Do NOT use the unit until a service
person confirms that the part from
which the refrigerant leaked has been
repaired.
WARNING
The appliance shall be stored in a
room without continuously operating
ignition sources (example: open
flames, an operating gas appliance or
an operating electric heater).
WARNING
▪ Do NOT pierce or burn refrigerant
cycle parts.
▪ Do NOT use cleaning materials or
means to accelerate the defrosting
process other than those
recommended by the manufacturer.
▪ Be aware that the refrigerant inside
the system is odourless.
After-sales service and warranty (see "7.3After-sales
service"[414])
WARNING
▪ Do NOT modify, disassemble,
remove, reinstall or repair the unit
yourself as incorrect dismantling or
installation may cause an electrical
shock or fire. Contact your dealer.
4 About the system
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▪ In case of accidental refrigerant
leaks, make sure there are no naked
flames. The refrigerant itself is
entirely safe, non-toxic and mildly
flammable, 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.
Troubleshooting (see "8Troubleshooting"[414])
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,
electrical shock or fire. Contact your
dealer.
WARNING
The unit is equipped with a refrigerant
leak detection system for safety.
To be effective, the unit MUST be
electrically powered at all times after
installation, except for maintenance.
CAUTION
NEVER expose little children, plants or
animals directly to the airflow.
CAUTION
Do NOT touch the heat exchanger fins.
These fins are sharp and could result
in cutting injuries.
4 About the system
The VRV 5 uses R32 refrigerant which is rated as A2L and is mildly
flammable. For compliance with the requirements for enhanced
tightness refrigerating systems and IEC60335-2-40 the installer must
take extra measures. For more information, see "2.1Instructions for
equipment using R32 refrigerant"[47].
The indoor unit part of this VRV 5 heat pump system can be used for
heating/cooling applications. The type of indoor unit which can be
used depends on the outdoor unit series.
WARNING
▪ Do NOT modify, disassemble, remove, reinstall or
repair the unit yourself as incorrect dismantling or
installation may cause an electrical 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 mildly flammable, but it will
generate toxic gas when it accidentally leaks into a
room where combustible air from fan heaters, gas
cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been
repaired or corrected before resuming operation.
WARNING
The unit is equipped with a refrigerant leak detection
system for safety.
To be effective, the unit MUST be electrically powered at
all times after installation, except for short service periods.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments, food, plants, animals, or
works of art.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
NOTICE
It is NOT allowed to cool technical rooms like server rooms
and data centres, where year-round cooling is required.
4.1 System layout
Your VRV 5 heat pump series outdoor unit can be one of following
models:
Model Description
RXYA8~12 Heat pump model, for single or multi-use
RXYA14~20 Heat pump model, for single use
(standalone unit)
RYMA5 Heat pump model, only for multi-use and
only for standard combinations
Depending on the type of outdoor unit which is chosen, some
functionality will or will not exist. It will be indicated throughout this
operation manual when certain features have exclusive model rights
or not.
INFORMATION
The following figure is an example and may NOT
completely match your system layout
5 User interface
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a
c
de
g
i
f
e
cc
e
h
ii i
b
e
j
aHeat pump outdoor unit
bSafety valve unit (SV)
cVRV direct expansion (DX) indoor unit
dVRV direct expansion (DX) indoor unit (direct connection
from outdoor to indoor)
eRemote controller in normal mode
fRemote controller in alarm only mode
gRemote controller in supervisor mode (mandatory in
some situations)
hCentralised controller (optional)
iOption PCB (optional)
jCool/heat changeover remote control switch (optional)
Refrigerant piping
Interconnection and user interface wiring
Direct connection of indoor units to the outdoor unit
5 User interface
CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are
dangerous to touch and appliance problems may
happen. For checking and adjusting the internal parts,
contact your dealer.
This operation manual offers a non-exhaustive overview of the main
functions of the system.
Detailed information on required actions to achieve certain functions
can be found in the dedicated installation and operation manual of
the indoor unit.
Refer to the operation manual of the installed user interface.
6 Operation
6.1 Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
Cooling Heating
Outdoor temperature –5~46°CDB –20~20°CDB
–20~15.5°C WB
Indoor temperature 21~32°CDB
14~25°C WB
15~27°CDB
Indoor humidity ≤80%(a)
(a) To avoid condensation and water dripping out of the unit. If the
temperature or the humidity is beyond these conditions, safety
devices may be put in action and the air conditioner may not
operate.
Above operation range is only valid in case direct expansion indoor
units are connected to the VRV 5 system.
Special operation ranges are valid in case of using AHU. They can
be found in the installation/operation manual of the dedicated unit.
Latest information can be found in the technical engineering data.
6.2 Operating the system
6.2.1 About operating the system
▪ Operation procedure varies according to the combination of
outdoor unit and user interface.
▪ To protect the unit, turn on the main power switch 6 hours before
operation.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
6.2.2 About cooling, heating, fan only, and
automatic operation
▪ Changeover cannot be made with a user interface whose display
shows "changeover under centralised control" (refer to
installation and operation manual of the user interface).
▪ When the display "changeover under centralised control"
flashes, refer to "6.5.1 About setting the master user
interface"[413].
▪ 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.
6.2.3 About the heating operation
It may take longer to reach the set temperature for general heating
operation than for cooling operation.
The following operation is performed in order to prevent the heating
capacity from dropping or cold air from blowing.
Defrost operation
In heating operation, freezing of the outdoor unit's air cooled coil
increases over time, restricting the energy transfer to the outdoor
unit's coil. Heating capability decreases and the system needs to go
into defrost operation to be able to remove frost from the outdoor
unit’s coil. During defrost operation the heating capacity on the
indoor unit side will temporarily drop until defrosting is completed.
After defrosting, the unit will regain its full heating capacity.
In case of Then
Multi-use models
(continuous heating)
The indoor unit will continue heating
operation at a reduced level during defrost
operation. It will guarantee a decent comfort
level indoor.
Single-use models
(non-continuous
heating)
The indoor unit will stop fan operation, the
refrigerant cycle will reverse and energy
from inside the building will be used to
defrost the outdoor unit coil.
The indoor unit will indicate defrost operation on the display .
Hot start
In order to prevent cold air from blowing out of an indoor unit at the
start of heating operation, the indoor fan is automatically stopped.
The display of the user interface shows . It may take some time
before the fan starts. This is not a malfunction.
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6.2.4 To operate the system (WITHOUT cool/
heat changeover remote control switch)
1Press the operation mode selector button on the user interface
several times and select the operation mode of your choice.
Cooling operation
Heating operation
Fan only operation
2Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.
6.2.5 To operate the system (WITH cool/heat
changeover remote control switch)
Overview of the changeover remote control switch
a
b
aFAN ONLY/AIR CONDITIONING
SELECTOR SWITCH
Set the switch to for fan only
operation or to for heating or
cooling operation.
bCOOL/HEAT CHANGEOVER SWITCH
Set the switch to for cooling or to
for heating
Note: In case a cool/heat changeover remote control switch is used,
the position of DIP switch 1 (DS1-1) on the main PCB needs to be
switched to the ON position.
To start
1Select operation mode with the cool/heat changeover switch as
follows:
Cooling operation Heating operation Fan only operation
1
1
1
1
1
1
11
2Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.
To stop
3Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
To adjust
For programming temperature, fan speed and air flow direction refer
to the operation manual of the user interface.
6.3 Using the dry program
6.3.1 About the dry program
▪ The function of this program is to decrease the humidity in your
room with minimal temperature decrease (minimal room cooling).
▪ The micro computer automatically determines temperature and
fan speed (cannot be set by the user interface).
▪ The system does not go into operation if the room temperature is
low (<20°C).
6.3.2 To use the dry program (WITHOUT cool/
heat changeover remote control switch)
To start
1Press the operation mode selector button on the user interface
several times and select (program dry operation).
2Press the ON/OFF button of the user interface.
Result: The operation lamp lights up and the system starts
operating.
3Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to "6.4Adjusting the air flow direction"[413] for details.
To stop
4Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
6.3.3 To use the dry program (WITH cool/heat
changeover remote control switch)
To start
1Select cooling operation mode with the cool/heat changeover
remote control switch.
1
1
2Press the operation mode selector button on the user interface
several times and select (program dry operation).
3Press the ON/OFF button of the user interface.
Result: The operation lamp lights up and the system starts
operating.
4Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to "6.4Adjusting the air flow direction"[413] for details.
6 Operation
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To stop
5Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
6.4 Adjusting the air flow direction
Refer to the operation manual of the user interface.
6.4.1 About the air flow flap
Air flow flap types:
▪ Double flow + multi-flow units
▪ Corner units
▪ Ceiling suspended units
▪ Wall-mounted units
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
Cooling Heating
▪ When the room temperature is
lower than the set
temperature.
▪ When starting operation.
▪ When the room temperature is
higher than the set
temperature.
▪ At defrost operation.
▪ When operating continuously at horizontal air flow direction.
▪ When continuous operation with downward air flow is performed
at the time of cooling with a ceiling-suspended or a wall-mounted
unit, the micro computer may control the flow direction, and then
the user interface indication will also change.
The air flow direction can be adjusted in one of the following ways:
▪ The air flow flap itself adjusts its position.
▪ The air flow direction can be fixed by the user.
▪ Automatic and desired position .
WARNING
NEVER touch the air outlet or the horizontal blades while
the swing flap is in operation. Fingers may become caught
or the unit may break down.
NOTICE
▪ 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).
▪ Avoid operating in the horizontal direction . It may
cause dew or dust to settle on the ceiling or flap.
6.5 Setting the master user interface
6.5.1 About setting the master user interface
a
b
cc c c c
d d d d
be
d
aOutdoor unit
bSV unit
cVRV DX indoor unit
dUser interface
eDirect connection to VRV DX indoor unit
When the system is installed as shown in the figure above, it is
necessary to – for each subsystem – designate one of the user
interfaces as the master user interface.
The displays of slave user interfaces show (changeover 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
(cooling/heating masterhood).
6.5.2 To designate the master user interface
1Press 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 (changeover under
centralised control) of all slave user interfaces connected to the
same outdoor unit flashes.
2Press the operation mode selector button of the controller that
you wish to designate as the master user interface.
Result: Designation is completed. This user interface is
designated as the master user interface and the display
showing (changeover under centralised control) vanishes.
The displays of other user interfaces show (changeover
under centralised control).
Refer to the operation manual of the user interface.
7 Maintenance and service
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7 Maintenance and service
7.1 Precautions for maintenance and
service
CAUTION
See "3 User safety instructions" [4 7] to acknowledge all
related safety instructions.
NOTICE
NEVER inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
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.
7.2 About the refrigerant
CAUTION
See "3 User safety instructions" [4 7] to acknowledge all
related safety instructions.
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
Periodical inspections for refrigerant leaks may be required
depending on the applicable legislation. Contact your installer for
more information.
NOTICE
Applicable legislation on fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO2 equivalent.
Formula to calculate the quantity in CO2 equivalent
tonnes: GWP value of the refrigerant × total refrigerant
charge [in kg]/1000
Contact your installer for more information.
7.3 After-sales service
7.3.1 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.
WARNING
▪ Do NOT modify, disassemble, remove, reinstall or
repair the unit yourself as incorrect dismantling or
installation may cause an electrical 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 mildly flammable, 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.
8 Troubleshooting
If one of the following malfunctions occurs, 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, electrical 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.
The operation switch does NOT work
well.
Turn OFF the power
supply.
If the user interface display indicates the
unit number, the operation lamp flashes
and the malfunction code appears.
Notify your installer and
report the malfunction
code.
If the system does NOT operate properly except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system in accordance with the following
procedures.
Malfunction Measure
If a refrigerant leak
occurs (error code /
)
▪ Actions will be taken by the system. Do
NOT turn OFF the power supply.
▪ Notify your installer and report the
malfunction code.
If the system does not
operate at all.
▪ Check if there is no power failure. Wait
until power is restored. If power failure
occurs during operation, the system
automatically restarts immediately after
power is restored.
▪ Check if no fuse has blown or breaker is
activated. Change the fuse or reset the
breaker if necessary.
If the system goes into
fan only operation, but
as soon as it goes into
heating or cooling
operation, the system
stops.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
▪ Check if the user interface display shows
on the home screen. Refer to the
installation and operation manual
delivered with the indoor unit.
8 Troubleshooting
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Malfunction Measure
The system operates
but cooling or heating
is insufficient.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
▪ 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. Close
doors and windows to prevent wind from
coming in.
▪ Check if there are too many occupants in
the room during cooling operation. Check
if the heat source of the room is
excessive.
▪ Check if direct sunlight enters the room.
Use curtains or blinds.
▪ Check if the air flow angle is proper.
If 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).
8.1 Error codes: Overview
In case a malfunction code appears on the indoor unit user interface
display, contact your installer and inform the malfunction code, the
unit type, and serial number (you can find this information on the
nameplate of the unit).
For your reference, a list with malfunction codes is provided. You
can, depending on the level of the malfunction code, reset the code
by pushing the ON/OFF button. If not, ask your installer for advice.
Main code Contents
External protection device was activated
The R32 sensor in one of the indoor units has
detected a refrigerant leak(a)
The R32 sensor in one of the SV unit has detected a
refrigerant leak.
/ Safety system error (leak detection)(a)
EEPROM failure (indoor)
Drain system malfunction (indoor/SV unit)
Fan motor malfunction (indoor)
Swing flap motor malfunction (indoor)
Expansion valve malfunction (indoor)
Drain malfunction (indoor unit)
Filter dust chamber malfunction (indoor)
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)
R32 sensor malfunction in one of the indoor units(a)
R32 sensor end of lifetime in one of the indoor units(a)
Main code Contents
R32 sensor end of lifetime<6months in one of the
indoor units(a)
Waiting for indoor unit R32 sensor replacement input(a)
Waiting for SV unit replacement input
SV unit R32 sensor malfunction
Less than 6 months before the SV unit R32 sensor
end of lifetime
SV unit R32 sensor end of lifetime
User interface thermistor malfunction (indoor)
PCB malfunction (outdoor)
Current leakage detector was activated (outdoor)
High pressure switch was activated
Low pressure malfunction (outdoor)
Compressor lock detection (outdoor)
Fan motor malfunction (outdoor)
Electronic expansion valve malfunction (outdoor)
SV unit damper malfunction
Discharge temperature malfunction (outdoor)
Abnormal suction temperature (outdoor)
Refrigerant overcharge detection
High pressure switch malfunction
Low pressure switch malfunction
Fan motor malfunction (outdoor)
Ambient temperature sensor malfunction (outdoor)
Discharge temperature sensor malfunction (outdoor)
Suction temperature sensor malfunction (outdoor)
De-icing temperature sensor malfunction (outdoor) or
heat exchanger gas temperature sensor malfunction
(outdoor)
Liquid temperature sensor (after subcool HE)
malfunction (outdoor)
Liquid temperature sensor (coil) malfunction (outdoor)
Gas temperature sensor (after subcool HE)
malfunction (outdoor)
High pressure sensor malfunction (S1NPH)
Low pressure sensor malfunction (S1NPL)
INV PCB abnormal
Fin temperature abnormal
INV PCB abnormal
Compressor over current detected
Compressor lock (startup)
Transmission outdoor unit - inverter: INV transmission
trouble
INV unbalanced power supply voltage
Fin thermistor malfunction
Capacity setting malfunction (outdoor)
Abnormal low pressure drop, faulty expansion valve
Reversed power supply phase malfunction
INV voltage power shortage
System test run not yet executed
Faulty wiring indoor/SV unit/outdoor
Abnormal user interface - indoor communication
Faulty wiring to outdoor/outdoor
Warning because there is an error on another unit
(indoor/SV unit)
8 Troubleshooting
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Main code Contents
Connection malfunction over indoor units or type
mismatch
System lock
External ventilation input error
Centralised address duplication
Malfunction in communication centralised control
device - indoor unit
Faulty wiring indoor/SV unit
Auto address malfunction (inconsistency)
Airflow rate below the legal limit (for EKEA/EKVDX)
(a) The error code is only shown on the user interface of the indoor
unit where the error occurs.
8.2 Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
8.2.1 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 Centralised 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 microcomputer is prepared for
operation.
8.2.2 Symptom: Cool/Heat cannot be changed
over
▪ When the display shows (changeover under centralised
control), it shows that this is a slave user interface.
▪ When the cool/heat changeover remote control switch is installed
and the display shows (changeover under centralised
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.
8.2.3 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 maximally until this
process is finished.
8.2.4 Symptom: The fan speed does not
correspond to the setting
The fan speed does not change even if the fan speed adjustment
button is pressed. During heating operation, when the room
temperature reaches the set temperature, the outdoor unit goes off
and the indoor unit changes to whisper fan speed. This is to prevent
cold air blowing directly on occupants of the room. The fan speed
will not change even when another indoor unit is in heating
operation, if the button is pressed.
8.2.5 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.
8.2.6 Symptom: White mist comes out of a unit
(Indoor unit)
▪ When humidity is high during cooling operation. If the interior of an
indoor unit is extremely contaminated, the temperature distribution
inside a room becomes uneven. It is necessary to clean the
interior of the indoor unit. Ask your dealer for details on cleaning
the unit. This operation requires a qualified service person.
▪ Immediately after the cooling operation stops and if the room
temperature and humidity are low. This is because warm
refrigerant gas flows back into the indoor unit and generates
steam.
8.2.7 Symptom: White mist comes out of a unit
(Indoor unit, outdoor unit)
When the system is changed over to heating operation after defrost
operation. Moisture generated by defrost becomes steam and is
exhausted.
8.2.8 Symptom: The user interface 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. A power reset may
help to remove this error.
8.2.9 Symptom: Noise of air conditioners
(Indoor unit)
▪ A "zeen" sound is heard immediately after the power supply is
turned on. The electronic expansion valve inside an indoor unit
starts working and makes the noise. Its volume will reduce in
about one minute.
▪ A continuous low "shah" sound is heard when the system is in
cooling operation or at a stop. When the drain pump (optional
accessories) is in operation, this noise is heard.
▪ A "pishi-pishi" squeaking sound is heard when the system stops
after heating operation. Expansion and contraction of plastic parts
caused by temperature change make this noise.
▪ A low "sah", "choro-choro" sound is heard while the indoor unit is
stopped. When another indoor unit is in operation, this noise is
heard. In order to prevent oil and refrigerant from remaining in the
system, a small amount of refrigerant is kept flowing.
8.2.10 Symptom: Noise of air conditioners
(Indoor unit, outdoor unit)
▪ A continuous low hissing sound is heard when the system is in
cooling or defrost operation. This is the sound of refrigerant gas
flowing through both indoor and outdoor units.
▪ A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation. This is the noise of
refrigerant caused by flow stop or flow change.
9 Relocation
Installation and operation manual
17
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
8.2.11 Symptom: Noise of air conditioners
(Outdoor unit)
When the tone of operating noise changes. This noise is caused by
the change of frequency.
8.2.12 Symptom: Dust comes out of the unit
When the unit is used for the first time in a long time. This is
because dust has gotten into the unit.
8.2.13 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emit it again.
8.2.14 Symptom: The outdoor unit fan does not
spin
During operation, the speed of the fan is controlled in order to
optimise product operation.
8.2.15 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 1minute.
8.2.16 Symptom: The compressor in the outdoor
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.
8.2.17 Symptom: The inside of an outdoor unit is
warm even when the unit has stopped
This is because the crankcase heater is warming the compressor so
that the compressor can start smoothly.
8.2.18 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.
9 Relocation
Contact your dealer to remove and reinstall the entire unit. Moving
units requires technical expertise.
10 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.
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
For the installer
11 About the box
Keep the following in mind:
▪ At delivery, the unit MUST be checked for damage and
completeness. Any damage or missing parts MUST be reported
immediately to the claims agent of the carrier.
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
▪ Prepare in advance the path along which you want to bring the
unit to its final installation position.
11.1 To remove the accessories from
the outdoor unit
Make sure that all accessories are available in the unit.
a d
1× 1×
e
1×
3P328191-1
BESURE TO FILL OUTTHE BLANKS, WH ICHARE NEEDED FOR AFTER-SALE SERVICES.
REQUESTFOR THE INDICATION OF INSTALLATIONINFORMATION
1.RECORD OF INDOOR UNIT MODELAND INSTALLATION SITE
2.RECORD FOR SETTINGS (CONTENTS SEE INSTALLATIONMANUAL)
SETTING
40
30
10
2019
9
29
3938
28
8
1817
7
27
3736
26
6
1615
5
25
3534
23 24
4321
INSTALLATION
MODELNAME
No.
12 13 14
504948474645
6059585756
64636261
11
2221
333231
44434241
5554535251
SITE
INSTALLATION
MODELNAME
No.
SITE
INSTALLATION
MODELNAME
No.
SITE
INSTALLATION
MODELNAME
No.
SITE
INSTALLATION
MODELNAME
No.
SITE
INSTALLATION
MODELNAME
No.
SITE
INSTALLATION
MODELNAME
No.
SITE
3.RECORDOF INSTALLATION DATE
6.AFTEREQUIPPING, PLEASE PUT IT ON THE BACK SIDE OF THE FRONT PLATE.
DAY MONTH YEAR 4.MODELNAME 5.MANUFACTURING NUMBER
VALUE REMARK DATE SETTING VALUE REMARK DATE
3P328192-1
3.FOR DETAILSCONCERNING PIPING SELECTION AND CALCULATION OR HOW TO OPERATE THE LEAK DETECTION FUNCTION, PLEASE REFERTO THE INSTALLATION MANUAL.
2.RECORD OF ADDITIONALREFRIGERANT CHARGE AMOUNT AND RESULT OF LEAK CHECK OPERATION
REQUESTFOR THE INDICATION OF ADDITIONALREFRIGERANT CHARGING AND LEAK DETECTION OPERATION RESULT
BESURE TO FILLOUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.
1.CALCULATIONOF ADDITIONAL REFRIGERANT CHARGING AMOUNT
4.AFTER FILLING INTHIS TABLE, PLEASE PUT IT ON THE SWITCH BOX COVER.
(m)x0.18(m)x0.37
kg
OUTDOOR
UNIT
(m)x0.26
(m)x0.12 (m)x0.059 (m)x0.022
ADDITIONALCHARGING
AMOUNT
TOTALLENGTHOFLIQUID
PIPESIZEO22.2 x 0.37
TOTALLENGTHOFLIQUID
PIPESIZEO19.1 x 0.26
TOTALLENGTHOFLIQUID
PIPESIZEO15.9 x 0.18
TOTALLENGTHOFLIQUID
PIPESIZEO12.7 x 0.12
TOTALLENGTHOFLIQUID
PIPESIZEO9.5 x 0.059
TOTALLENGTHOFLIQUID
PIPESIZEO6.4 x 0.022
105%<CR< 130%
50%<CR< 105%
50%<CR< 70%
70%<CR< 85%
85%<CR< 105%
105%<CR< 130%
8HP
Totalindoorunit
capacityconnection
ratio(CR)
10-12HP14-16HP18-20HP
2.0
1.5
1.5
1.2
1.5
1
1
0.7
1.0
0.5
0.5
0.3
0.5
0
0
0
1.0
0.5
0.5
0.5
0.5
0
0
0
Totalindoorunitcapacity
whenpipinglength <30m
Totalindoorunitcapacity
whenpipinglength >30m
kg
1.3
1.1
0.9
RYYQ18-20
RYYQ14-16
RYYQ8~12
kg
ONLYFORRYYQ8~20MODELS
DATE
AMOUNT
CALCULATETHEADDITIONALREFRIGERANT CHARGINGAMOUNTBASED ON THE FORMULABELOWBEFORE CHARGING.
SHIPMENT(INDICATEDON THE MACHINE NAMEPLATE)AND THE ADDITIONAL AMOUNT SHOWNAS FOLLOWS :
WHENRE-CHARGINGTOTALAMOUNT OF REFRIGERANT , CHARGETHETOTAL OF THE AMOUNT CHARGED AT
RESULTLEAKCHECK
DATE
AMOUNT
RESULTLEAKCHECK
DATE
AMOUNT
RESULTLEAKCHECK
DATE
AMOUNT
RESULTLEAKCHECK
c
1×
b
1×
f g
1×1×
aGeneral safety precautions
bInstallation manual and operation manual
cAdditional refrigerant charge label
dInstallation information sticker
eFluorinated greenhouse gases label
fMultilingual fluorinated greenhouse gases label
gPiping accessory bag
11.2 Accessory pipes: Diameters
Accessory pipes HP Øa [mm] Øb [mm]
Gas pipe
▪ Front connection
ID Øa ID Øb
▪ Bottom connection
ID Øa
OD Øb
5 19.1 19.1
8
10
12 22.2
14
16 28.6
18
20
12 About the units and options
Installation and operation manual
18
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
Accessory pipes HP Øa [mm] Øb [mm]
Liquid pipe
▪ Front connection
ID Øb
ID Øa
▪ Bottom connection
ID Øb
ID Øa
5 9.5 9.5
8
10
12 12.7
14 12.7
16
18
20
Equaliser pipe
▪ Front connection
ID ØaID Øb
▪ Bottom connection
ID Øa
OD Øb
5~12 25.4 19.1
11.3 To remove the transportation stay
(only for 5~12 HP)
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The transportation stay for protecting the unit during transport must
be removed. Proceed as shown in the figure and procedure below.
1Remove the bolt (a) and washers.
2Remove the transportation stay (b) as shown in the figure
below.
1
2
(12.3 N·m)
a
b
aBolt
bTransportation stay
12 About the units and options
12.1 About the outdoor unit
This installation manual concerns the VRV 5, full inverter driven,
heat pump system.
Model line up:
Model Description
RXYA8~12 Heat pump model, for single or multi-use
RXYA14~20 Heat pump model, for single use
(standalone unit)
RYMA5 Heat pump model, only for multi-use and
only for standard combinations
Depending on the type of outdoor unit which is chosen, some
functionality will or will not exist. It will be indicated throughout this
installation manual and brought to your attention. Certain features
have exclusive model rights.
These units are intended for outdoor installation and aimed for heat
pump applications including air to air applications.
These units have (in single use) heating capacities ranging from 25
to 63kW and cooling capacities rating from 22.4 to 56kW. In multi
combination the heating capacity can go up to 56kW and in cooling
to 62.5kW.
The outdoor unit is designed to work at the following ambient
temperatures:
▪ in heating mode from –20°CWB to 15.5°CWB
▪ in cooling mode from –5°CDB to 46°CDB
12.2 System layout
WARNING
The installation MUST comply with the requirements that
apply to this R32 equipment. For more information, see
"13Special requirements for R32 units"[419].
NOTICE
It is NOT allowed to cool technical rooms like server rooms
and data centres, where year-round cooling is required.
INFORMATION
The following figure is an example and may NOT
completely match your system layout
a
c
de
g
i
f
e
cc
e
h
ii i
b
e
j
aHeat pump outdoor unit
bSafety valve unit (SV)
cVRV direct expansion (DX) indoor unit
dVRV direct expansion (DX) indoor unit (direct connection
from outdoor to indoor)
eRemote controller in normal mode
fRemote controller in alarm only mode
gRemote controller in supervisor mode (mandatory in
some situations)
hCentralised controller (optional)
iOption PCB (optional)
jCool/heat changeover remote control switch (optional)
Refrigerant piping
Interconnection and user interface wiring
Direct connection of indoor units to the outdoor unit
13 Special requirements for R32 units
Installation and operation manual
19
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
13 Special requirements for R32
units
In this chapter
13.1 Installation space requirements ....................................................... 19
13.2 System layout requirements............................................................. 19
13.3 To determine the required safety measures .................................... 21
13.3.1 Overview: flowchart ........................................................... 22
13.4 Safety measures .............................................................................. 22
13.4.1 No safety measure............................................................. 22
13.4.2 Alarm ................................................................................. 22
13.4.3 Natural ventilation .............................................................. 23
13.4.4 Shut-off valves ................................................................... 24
13.4.5 Overview: flowchart ........................................................... 26
13.5 Combinations of safety measures.................................................... 27
13.1 Installation space requirements
WARNING
If the appliance contains R32 refrigerant, the floor area of
the room in which the appliance is stored shall be at least
956m².
NOTICE
▪ The pipework shall be securely mounted and guarded
protected from physical damage.
▪ Keep the pipework installation to a minimum.
13.2 System layout requirements
The VRV 5 uses R32 refrigerant which is rated as A2L and is mildly
flammable.
To comply with the requirements of enhanced tightness refrigerating
systems of the IEC 60335-2-40, this system is equipped with an
alarm in the remote controller and shut-off valves in the SV unit.
Both safety measures are installation specific and can be
determined using the requirements mentioned in this manual. The
SV unit is prearranged for a ventilated enclosure as
countermeasure. In case the requirements of this manual are
followed, no additional safety measures are needed.
A big range of charge and room area combinations is allowed thanks
to the countermeasures that are implemented in the system by
default.
Follow the installation requirements below to ensure that the
complete system is compliant to legislation.
Outdoor unit installation
The outdoor unit must be installed outside. For indoor installation of
the outdoor unit, additional measures can be necessary to comply
with the applicable legislation.
A terminal for external output is available in the outdoor unit. This
SVS output can be used when additional countermeasures are
needed. The SVS output is a contact on terminal X2M that closes in
case a leak is detected, failure or disconnection of an R32 sensor
(located in the indoor unit or SV unit).
For more information about the SVS output, see "17.9 To connect
the external outputs"[444].
Indoor unit installation
NOTICE
If one or more rooms are connected to the unit using a
duct system, make sure air inlet AND outlet are connected
directly to the same room by ducting. Do NOT use spaces
such as a false ceiling as a duct for the air inlet or outlet.
For installation of the indoor unit, refer to the installation and
operation manual delivered with the indoor unit. For compatibility of
indoor units refer to the latest version of the technical data book of
this unit.
Depending on the room size in which the indoor unit is installed and
the total amount of refrigerant in the system, other safety measures
are necessary for indoor units. See "13.3To determine the required
safety measures"[421].
An optional output PCB for the indoor unit can be added to provide
output for external device. The output PCB will trigger in case a leak
is detected, the R32 sensor fails or when the sensor is disconnected.
For exact model name see option list of the indoor unit. For more
information about this option, refer to the installation manual of the
optional output PCB.
Piping requirements
CAUTION
Piping MUST be installed according to instructions given in
"15 Piping installation" [4 29]. Only mechanical joints (e.g.
braze+flare connections) that are compliant with the latest
version of ISO14903 can be used.
Low temperature solder alloys shall not be used for pipe
connections.
For piping installed in the occupied space, make sure that the piping
is protected against accidental damage. Piping should be checked
according to the procedure as mentioned in "15.3 Checking the
refrigerant piping"[434].
Remote controller requirements
For installation of the remote controller, please refer to the
installation and operation manual delivered with the remote
controller. Each indoor unit must be connected with a R32 safety
system compatible remote controller (e.g. BRC1H52/82* or later
type). These remote controllers have implemented safety measures
that will warn the user visually and audibly in case of a leak.
For installation of the remote controller, it is mandatory to follow the
requirements.
1Only a safety system compatible remote controller can be used.
See technical data sheet for remote controller compatibility (e.g.
BRC1H52/82*).
2Each indoor unit must be connected to a separate remote
controller. In case indoor units are operating under group
control, it is possible to only use one remote controller per
room.
3The remote controller put in the room served by the indoor unit
must be in 'fully functional' or 'alarm only' mode. In case the
indoor unit is serving a different room than where it is installed,
a remote controller is required in both installed and served
room. For details about the different remote controller modes
and how to set up, please check the note below or refer to the
installation and operation manual delivered with the remote
controller.
Special requirements for R32 units
Installation and operation manual
20
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
Examples
NOT OK OK Case
1
a
b
d
c
e
c
a
b
Remote controller is not R32 safety system
compatible
2
c c c
a
b
e
c
e
c
e
c
e
a b
Indoor units without remote controller are not
allowed
3
e
c
a b
e
c
a
b
In case of one R32 safety system compatible
remote controller, it should be the master and in
the same room of the indoor unit.
4
e
c
a
b
e
c
a
b
e
In case a ducted indoor unit serves a different
room than where it is installed, both supply and
return air MUST be directly ducted to that room.
The room area and remote controller rules MUST
be followed for both installed and served room.
5
e
e
c
a
b
f
e
c
a
b
In case of two R32 safety system compatible
remote controllers, at least one remote controller
should be in the room of the indoor.
6
c c
e
a
b
c c c
e
a
b
Group control is allowed up to a maximum of
10indoor units connected to different ports or
connected to the same port. At least one R32
safety system compatible remote controller should
be in the room of the indoors.
7
c c c
e
a
b
c c c
e
a
b
All indoor units under group control need to be
conditioning the same room.
8
c
e
c
e
f
g
a b
In room: master remote controller in fully functional OR alarm only.
In supervisor room: supervisor remote controller
In particular situations it is mandatory to install a
remote controller at a supervised location
aOutdoor unit
bSV unit
cIndoor unit
dRemote controller NOT compatible with R32 safety
system
eRemote controller compatible with R32 safety system
fRemote controller in supervisor mode
gSupervisor room
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