Daikin RXYTQ8U7YF, RXYTQ10U7YF, RXYTQ12U7YF, RXYTQ14U7YF, RXYTQ16U7YF Operation manuals
Installation and operation manual
VRV IV+ heat pump for high ambient temperatures
RXYTQ8U7YF
RXYTQ10U7YF
RXYTQ12U7YF
RXYTQ14U7YF
RXYTQ16U7YF
Installation and operation manual
VRV IV+ heat pump for high ambient temperatures
English
Table of contents
Table of contents
1 About the documentation 3
1.1 About this document.................................................................. 3
2 Specific installer safety instructions 3
For the user 4
3 User safety instructions 4
3.1 General...................................................................................... 5
3.2 Instructions for safe operation ................................................... 5
4 About the system 6
4.1 System layout............................................................................ 7
5 User interface 7
6 Operation 7
6.1 Operation range ........................................................................ 7
6.2 Operating the system ................................................................ 7
6.2.1 About operating the system ........................................ 7
6.2.2 About cooling, heating, fan only, and automatic
operation ..................................................................... 7
6.2.3 About the heating operation........................................ 7
6.2.4 To operate the system (WITHOUT cool/heat
changeover remote control switch) ............................. 7
6.2.5 To operate the system (WITH cool/heat changeover
remote control switch)................................................. 7
6.3 Using the dry program............................................................... 8
6.3.1 About the dry program ................................................ 8
6.3.2 To use the dry program (WITHOUT cool/heat
changeover remote control switch) ............................. 8
6.3.3 To use the dry program (WITH cool/heat changeover
remote control switch)................................................. 8
6.4 Adjusting the air flow direction................................................... 8
6.4.1 About the air flow flap ................................................. 8
6.5 Setting the master user interface .............................................. 9
6.5.1 About setting the master user interface ...................... 9
7 Maintenance and service 9
7.1 About the refrigerant.................................................................. 9
7.2 After-sales service and warranty ............................................... 9
7.2.1 Warranty period .......................................................... 9
7.2.2 Recommended maintenance and inspection.............. 9
8 Troubleshooting 10
8.1 Error codes: Overview............................................................... 10
8.2 Symptoms that are NOT system malfunctions .......................... 11
8.2.1 Symptom: The system does not operate .................... 11
8.2.2 Symptom: Cool/Heat cannot be changed over ........... 11
8.2.3 Symptom: Fan operation is possible, but cooling and
heating do not work..................................................... 11
8.2.4 Symptom: The fan speed does not correspond to the
setting ......................................................................... 11
8.2.5 Symptom: The fan direction does not correspond to
the setting ................................................................... 11
8.2.6 Symptom: White mist comes out of a unit (Indoor
unit) ............................................................................. 11
8.2.7 Symptom: White mist comes out of a unit (Indoor
unit, outdoor unit) ........................................................ 11
8.2.8 Symptom: The user interface reads "U4" or "U5" and
stops, but then restarts after a few minutes ................ 11
8.2.9 Symptom: Noise of air conditioners (Indoor unit)........ 12
8.2.10 Symptom: Noise of air conditioners (Indoor unit,
outdoor unit)................................................................ 12
8.2.11 Symptom: Noise of air conditioners (Outdoor unit) ..... 12
8.2.12 Symptom: Dust comes out of the unit ......................... 12
8.2.13 Symptom: The units can give off odours..................... 12
8.2.14 Symptom: The outdoor unit fan does not spin ............ 12
8.2.15 Symptom: The display shows "88"............................... 12
8.2.16 Symptom: The compressor in the outdoor unit does
not stop after a short heating operation ....................... 12
8.2.17 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped .................................. 12
8.2.18 Symptom: Hot air can be felt when the indoor unit is
stopped ........................................................................ 12
9 Relocation 12
10 Disposal 12
For the installer 12
11 About the box 12
11.1
About ............................................................................ 12
11.2 To remove the accessories from the outdoor unit ...................... 12
11.3 Accessory pipes: Diameters ....................................................... 13
11.4 To remove the transportation stay.............................................. 13
12 About the units and options 13
12.1 About the outdoor unit ................................................................ 13
12.2 System layout ............................................................................. 13
13 Unit installation 13
13.1 Preparing the installation site ..................................................... 13
13.1.1 Installation site requirements of the outdoor unit ......... 13
13.1.2 Additional installation site requirements of the
outdoor unit in cold climates ........................................ 14
13.2 Opening the unit ......................................................................... 14
13.2.1 To open the outdoor unit .............................................. 14
13.2.2 To open the electrical component box of the outdoor
unit ............................................................................... 14
13.3 Mounting the outdoor unit........................................................... 14
13.3.1 To provide the installation structure ............................. 14
14 Piping installation 15
14.1 Preparing refrigerant piping ........................................................ 15
14.1.1 Refrigerant piping requirements................................... 15
14.1.2 To select the piping size .............................................. 15
14.1.3 To select refrigerant branch kits................................... 16
14.1.4 Multiple outdoor units: Possible layouts ....................... 17
14.2 Connecting the refrigerant piping ............................................... 17
14.2.1 To route the refrigerant piping...................................... 17
14.2.2 To connect the refrigerant piping to the outdoor unit ... 18
14.2.3 To connect the multi connection piping kit ................... 18
14.2.4 To connect the refrigerant branching kit ...................... 18
14.2.5 To protect against contamination ................................. 18
14.2.6 Using the stop valve and service port .......................... 18
14.2.7 To remove the spun pipes ........................................... 19
14.3 Checking the refrigerant piping .................................................. 20
14.3.1 About checking the refrigerant piping .......................... 20
14.3.2 Checking refrigerant piping: General guidelines .......... 20
14.3.3 Checking refrigerant piping: Setup............................... 20
14.3.4 To perform a leak test .................................................. 21
14.3.5 To perform vacuum drying ........................................... 21
14.3.6 To insulate the refrigerant piping ................................. 21
14.4 Charging refrigerant ................................................................... 21
14.4.1 Precautions when charging refrigerant ........................ 21
14.4.2 About charging refrigerant ........................................... 22
14.4.3 To determine the additional refrigerant amount ........... 22
14.4.4 To charge refrigerant: Flow chart ................................. 23
14.4.5 To charge refrigerant ................................................... 24
14.4.6 Step 6: To manually charge refrigerant........................ 25
14.4.7 Error codes when charging refrigerant......................... 25
14.4.8 Checks after charging refrigerant................................. 25
15 Electrical installation 26
15.1 Safety device requirements ........................................................ 26
15.2 Field wiring: Overview ................................................................ 26
Installation and operation manual
2
VRV IV+ heat pump for high ambient temperatures
RXYTQ8~16U7YF
4P546223-1B – 2020.10
1 About the documentation
15.3 To route and fix the transmission wiring .................................... 26
15.4 To connect the transmission wiring ........................................... 27
15.5 To finish the transmission wiring ............................................... 27
15.6 To route and fix the power supply ............................................. 27
15.7 To connect the power supply .................................................... 28
15.8 To check the insulation resistance of the compressor .............. 28
16 Configuration 28
16.1 Making field settings .................................................................. 28
16.1.1 About making field settings ......................................... 28
16.1.2 Field setting components ............................................ 29
16.1.3 To access the field setting components ...................... 29
16.1.4 To access mode 1 or 2 ............................................... 29
16.1.5 To use mode 1 ............................................................ 30
16.1.6 To use mode 2 ............................................................ 30
16.1.7 Mode 1: Monitoring settings ........................................ 30
16.1.8 Mode 2: Field settings ................................................. 30
16.1.9 To connect the PC configurator to the outdoor unit .... 31
17 Commissioning 31
17.1 Precautions when commissioning ............................................. 31
17.2 Checklist before commissioning ................................................ 31
17.3 About the test run ...................................................................... 32
17.4 To perform a test run ................................................................. 32
17.5 Correcting after abnormal completion of the test run ................ 33
18 Hand-over to the user 33
19 Troubleshooting 33
19.1 Solving problems based on error codes .................................... 33
19.2 Error codes: Overview ............................................................... 33
20 Technical data 36
20.1 Service space: Outdoor unit ...................................................... 36
20.2 Piping diagram: Outdoor unit..................................................... 38
20.3 Wiring diagram: Outdoor unit .................................................... 38
21 Disposal 40
▪ Installer and user reference guide:
▪ Preparation of the installation, reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ Format: Digital files on http://www.daikineurope.com/support-
and-manuals/product-information/
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.
The original documentation is written in English. All other languages
are translations.
Technical engineering data
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
Business Portal (authentication required).
2 Specific installer safety
instructions
Always observe the following safety instructions and regulations.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
1 About the documentation
1.1 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)
CAUTION
Excessive refrigerant concentrations in a closed room can
lead to oxygen deficiency.
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
WARNING
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ Toxic gas might be produced if refrigerant gas comes
into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
Installation and operation manual
3
3 User safety instructions
WARNING
During tests, NEVER pressurize 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 spun piping.
If these instructions are NOT followed correctly it may
result in property damage or personal injury, which may be
serious depending on the circumstances.
WARNING
NEVER remove the spun piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
WARNING
▪ ONLY use R410A as refrigerant. Other substances
may cause explosions and accidents.
▪ R410A contains fluorinated greenhouse gases. Its
global warming potential (GWP) value is 2087.5. Do
NOT vent these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
CAUTION
Do NOT push or place redundant cable length in the unit.
WARNING
▪ If the power supply has a missing or wrong N-phase,
equipment might break down.
▪ Establish proper earthing. Do NOT earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, stranded conductor wires,
extension cords, or connections from a star system.
They can cause overheating, electrical shock or fire.
▪ Do NOT install a phase advancing capacitor, because
this unit is equipped with an inverter. A phase
advancing capacitor will reduce performance and may
cause accidents.
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST comply with the applicable
legislation.
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.
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.
For the user
3 User safety instructions
Always observe the following safety instructions and regulations.
Installation and operation manual
4
VRV IV+ heat pump for high ambient temperatures
RXYTQ8~16U7YF
4P546223-1B – 2020.10
3 User safety instructions
3.1 General
WARNING
If you are NOT sure how to operate the
unit, contact your installer.
WARNING
Children aged from 8 years and above
and persons with reduced physical,
sensory or mental capabilities or lack
of experience and knowledge can only
use this appliance if they have been
given supervision or instruction
concerning the use of the appliance by
a person responsible for their safety.
Children MUST NOT play with the
appliance.
Cleaning and user maintenance MUST
NOT be carried out by children without
supervision.
WARNING
To prevent electrical shocks or fire:
▪ Do NOT rinse the unit.
▪ Do NOT operate the unit with wet
hands.
▪ Do NOT place any objects containing
water on the unit.
CAUTION
▪ Batteries are marked with the following symbol:
This means that the batteries may NOT be mixed with unsorted
household waste. If a chemical symbol is printed beneath the
symbol, this chemical symbol means that the battery contains a
heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries must be treated at a specialized treatment facility
for reuse. By ensuring waste batteries are disposed of correctly,
you will help to prevent potential negative consequences for the
environment and human health.
3.2 Instructions for safe operation
CAUTION
▪ NEVER touch the internal parts of the
controller.
▪ Do NOT remove the front panel.
Some parts inside are dangerous to
touch and appliance problems may
happen. For checking and adjusting
the internal parts, contact your
dealer.
CAUTION
Do NOT operate the system when
using a room fumigation-type
insecticide. Chemicals could collect in
the unit, and endanger the health of
people who are hypersensitive to
chemicals.
▪ 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: 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.
CAUTION
It is unhealthy to expose your body to
the air flow for a long time.
CAUTION
To avoid oxygen deficiency, ventilate
the room sufficiently if equipment with
burner is used together with the
system.
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.
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
Installation and operation manual
5
4 About the system
WARNING
Never touch the air outlet or the
horizontal blades while the swing flap
is in operation. Fingers may become
caught or the unit may break down.
CAUTION
Do NOT insert fingers, rods or other
objects into the air inlet or outlet. Do
NOT remove the fan guard. When the
fan is rotating at high speed, it will
cause injury.
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while
the fan is running.
Be sure to turn off the main switch
before executing any maintenance
task.
CAUTION
After a long use, check the unit stand
and fitting for damage. If damaged, the
unit may fall and result in injury.
WARNING
Stop operation and shut off the
power if anything unusual occurs
(burning smells etc.).
Leaving the unit running under such
circumstances may cause breakage,
electric shock or fire. Contact your
dealer.
WARNING
The refrigerant in the system is safe
and normally does not leak. If the
refrigerant leaks in the room, contact
with a fire of a burner, a heater or a
cooker may result in a harmful gas.
Turn off any combustible heating
devices, ventilate the room and contact
the dealer where you purchased the
unit.
Do not use the system until a service
person confirms that the portion where
the refrigerant leaks is repaired.
CAUTION
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
▪ 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 noncombustible, 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.
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 indoor unit part of VRV IV heat pump system can be used for
heating/cooling applications. The type of indoor unit which can be
used depends on the outdoor units series.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments, food, plants, animals, or
works of art.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
Installation and operation manual
6
VRV IV+ heat pump for high ambient temperatures
RXYTQ8~16U7YF
4P546223-1B – 2020.10
5 User interface
a
b
4.1 System layout
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.
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 –5~52°CDB –20~21°CDB
–20~15.5°C WB
Indoor temperature 21~32°CDB
14~25°C WB
Indoor humidity ≤80%
(a)
To avoid condensation and water dripping out of the unit. If the
temperature or the humidity is beyond these conditions, safety
devices may be put in action and the air conditioner may not
operate.
Above operation range is only valid in case direct expansion indoor
units are connected to the VRV IV 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 "change-over under centralised control" (refer to
installation and operation manual of the user interface).
▪ When the display "change-over under centralised control"
flashes, refer to "About setting the master user interface"[49].
▪ The fan may keep on running for about 1 minute after the heating
operation stops.
▪ The air flow rate may adjust itself depending on the room
temperature or the fan may stop immediately. This is not a
malfunction.
15~27°CDB
(a)
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.
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.
6.2.4 To operate the system (WITHOUT cool/ heat changeover remote control switch)
1 Press 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
2 Press 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 FAN ONLY/AIR CONDITIONING
SELECTOR SWITCH
Set the switch to for fan only
operation or to for heating or
cooling operation.
b COOL/HEAT CHANGEOVER SWITCH
Set the switch to for cooling or to
for heating
Note: In case a cool/heat changeover remote control switch is used,
the position of DIP switch 1 (DS1-1) on the main PCB needs to be
switched to the ON position.
To start
1 Select operation mode with the cool/heat changeover switch as
follows:
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
Installation and operation manual
7
6 Operation
1
1
1
1
1
1
1
Cooling operation
2 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
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.
Heating operation
Fan only operation
6.3 Using the dry program
6.3.3 To use the dry program (WITH cool/heat changeover remote control switch)
To start
1 Select cooling operation mode with the cool/heat changeover
remote control switch.
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.
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 "6.4Adjusting the air flow direction"[48] for details.
To stop
5 Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
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
1 Press the operation mode selector button on the user interface
several times and select (program dry operation).
2 Press the ON/OFF button of the user interface.
Result: The operation lamp lights up and the system starts
operating.
3 Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to "6.4Adjusting the air flow direction"[48] for details.
To stop
4 Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
6.4 Adjusting the air flow direction
Refer to the operation manual of the user interface.
6.4.1 About the air flow flap
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 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.
▪ When starting operation.
▪ When the room temperature is
higher than the set
temperature.
▪ At defrost operation.
Installation and operation manual
8
VRV IV+ heat pump for high ambient temperatures
RXYTQ8~16U7YF
4P546223-1B – 2020.10
7 Maintenance and service
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
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.
7 Maintenance and service
NOTICE
NEVER inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
WARNING
NEVER replace a fuse with a fuse of a wrong ampere
ratings or other wires when a fuse blows out. Use of wire
or copper wire may cause the unit to break down or cause
a fire.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. Do NOT remove the fan guard. When the
fan is rotating at high speed, it will cause injury.
CAUTION
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.
7.1 About the refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R410A
Global warming potential (GWP) value: 2087.5
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
Please contact your installer for more information.
WARNING
The refrigerant in the system is safe and normally does not
leak. If the refrigerant leaks in the room, contact with a fire
of a burner, a heater or a cooker may result in a harmful
gas.
Turn off any combustible heating devices, ventilate the
room and contact the dealer where you purchased the unit.
Do not use the system until a service person confirms that
the portion where the refrigerant leaks is repaired.
7.2 After-sales service and warranty
7.2.1 Warranty period
▪ This product includes a warranty card that was filled in by the
dealer at the time of installation. The completed card has to be
checked by the customer and stored carefully.
▪ If repairs to the product are necessary within the warranty period,
contact your dealer and keep the warranty card at hand.
7.2.2 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.
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.
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
Installation and operation manual
9
8 Troubleshooting
8 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.
If water leaks from the unit. Stop the operation.
The operation switch does NOT work
well.
If the user interface display indicates the
unit number, the operation lamp flashes
and the malfunction code appears.
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 the system does not
operate at all.
If the system goes into
fan only operation, but
as soon as it goes into
heating or cooling
operation, the system
stops.
The system operates
but cooling or heating
is insufficient.
▪ 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.
▪ 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
(time to clean the air filter). (Refer to
"7 Maintenance and service" [4 9] and
"Maintenance" in the indoor unit manual.)
▪ 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.
Turn OFF the main power
switch.
Turn OFF the power
supply.
Notify your installer and
report the malfunction
code.
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
EEPROM failure (indoor)
Drain system malfunction (indoor)
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)
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)
Discharge temperature malfunction (outdoor)
Abnormal suction temperature (outdoor)
Refrigerant overcharge detection
High pressure switch malfunction
Low pressure switch malfunction
Fan motor trouble (outdoor)
Ambient temperature sensor malfunction (outdoor)
Pressure sensor malfunction
Current sensor malfunction
Discharge temperature sensor malfunction (outdoor)
Heat exchanger gas temperature sensor malfunction
(outdoor)
Suction temperature sensor malfunction (outdoor)
De-icing temperature sensor malfunction (outdoor)
Liquid temperature sensor (after subcool HE)
malfunction (outdoor)
Liquid temperature sensor (coil) malfunction (outdoor)
Gas temperature sensor (after subcool HE)
malfunction (outdoor)
Installation and operation manual
10
VRV IV+ heat pump for high ambient temperatures
RXYTQ8~16U7YF
4P546223-1B – 2020.10
8 Troubleshooting
Main code Contents
High pressure sensor malfunction (S1NPH)
Low pressure sensor malfunction (S1NPL)
INV PCB abnormal
Fin temperature abnormal
Inverter PCB faulty
Compressor over current detected
Compressor lock (startup)
Transmission outdoor unit - inverter: INV transmission
trouble
INV unbalanced power supply voltage
Autocharge operation related
Fin thermistor malfunction
Autocharge operation related
Autocharge operation related
Autocharge operation related
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/outdoor
Abnormal user interface - indoor communication
Faulty wiring to outdoor/outdoor
Abnormal main-sub user interface communication
System mismatch. Wrong type of indoor units
combined. Indoor unit malfunction.
Connection malfunction over indoor units or type
mismatch
Centralised address duplication
Malfunction in communication centralised control
device - indoor unit
Auto address malfunction (inconsistency)
Auto address malfunction (inconsistency)
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 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.
8.2.2 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.
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.
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
Installation and operation manual
11
9 Relocation
a
1×
e
1×
3P328191-1
BE SURE TO FILL OUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.
REQUEST FOR THE INDICATION OF INSTALLATION INFORMATION
1. RECORD OF INDOOR UNIT MODEL AND INSTALLATION SITE
2. RECORD FOR SETTINGS (CONTENTS SEE INSTALLATION MANUAL)
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. RECORD OF INSTALLATION DATE
6. AFTER EQUIPPING, PLEASE PUT IT ON THE BACK SIDE OF THE FRONT PLATE.
DAY MONTH YEAR
4. MODEL NAME 5. MANUFACTURING NUMBER
VALUE
REMARK DATE SETTING VALUE REMARK DATE
c
1×
b
1×
d
1×
3P328192-1
3. FOR DETAILS CONCERNING PIPING SELECTION AND CALCULATION OR HOW TO OPERATE THE LEAK DETECTION FUNCTION, PLEASE REFER TO THE INSTALLATION MANUAL.
2. RECORD OF ADDITIONAL REFRIGERANT CHARGE AMOUNT AND RESULT OF LEAK CHECK OPERATION
REQUEST FOR THE INDICATION OF ADDITIONAL REFRIGERANT CHARGING AND LEAK DETECTION OPERATION RESULT
BE SURE TO FILL OUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.
1. CALCULATION OF ADDITIONAL REFRIGERANT CHARGING AMOUNT
4. AFTER FILLING IN THIS TABLE, PLEASE PUT IT ON THE SWITCH BOX COVER.
(m) x 0.18(m) x 0.37
kg
OUTDOOR
UNIT
(m) x 0.26
(m) x 0.12 (m) x 0.059
(m) x 0.022
ADDITIONAL CHARGING
AMOUNT
TOTAL LENGTH OF LIQUID
PIPE SIZE O22.2 x 0.37
TOTAL LENGTH OF LIQUID
PIPE SIZE O19.1 x 0.26
TOTAL LENGTH OF LIQUID
PIPE SIZE O15.9 x 0.18
TOTAL LENGTH OF LIQUID
PIPE SIZE O12.7 x 0.12
TOTAL LENGTH OF LIQUID
PIPE SIZE O9.5 x 0.059
TOTAL LENGTH OF LIQUID
PIPE SIZE O6.4 x 0.022
105%< CR < 130%
50%< CR < 105%
50%< CR < 70%
70%< CR < 85%
85%< CR < 105%
105%< CR < 130%
8HP
Total indoor unit
capacity connection
ratio (CR)
10-12HP
14-16HP
18-20HP
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
Total indoor unit capacity
when piping length <30m
Total indoor unit capacity
when piping length >30m
kg
1.3
1.1
0.9
RYYQ18-20
RYYQ14-16
RYYQ8~12
kg
ONLY FOR RYYQ8~20 MODELS
DATE
AMOUNT
CALCULATE THE ADDITIONAL REFRIGERANT CHARGING AMOUNT BASED ON THE FORMULA BELOW BEFORE CHARGING.
SHIPMENT (INDICATED ON THE MACHINE NAMEPLATE) AND THE ADDITIONAL AMOUNT SHOWN AS FOLLOWS :
WHEN RE-CHARGING TOTAL AMOUNT OF REFRIGERANT , CHARGE THE TOTAL OF THE AMOUNT CHARGED AT
RESULT LEAK CHECK
DATE
AMOUNT
RESULT LEAK CHECK
DATE
AMOUNT
RESULT LEAK CHECK
DATE
AMOUNT
RESULT LEAK CHECK
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.
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.
8.2.15 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 for removing and reinstalling the total unit.
Moving units requires technical expertise.
10 Disposal
This unit uses hydrofluorocarbon. Contact your dealer when
discarding this unit.
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.
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.
For the installer
11 About the box
11.1 About
is part of Daikin's wider commitment to reduce our
environmental footprint. With we want to create a circular
economy for refrigerants. One of the actions to achieve this, is the
reuse of reclaimed refrigerant in VRV units produced and sold in
Europe. For more information about the countries that are in scope,
visit: http://www.daikin.eu/loop-by-daikin.
Installation and operation manual
12
11.2 To remove the accessories from the outdoor unit
Make sure that all accessories are available in the unit.
a General safety precautions
b Installation manual and operation manual
c Additional refrigerant charge label
d Installation information sticker
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
12 About the units and options
ID Øa
ID Øb
ID Øa
OD Øb
ID Øb
ID Øa
ID Øb
ID Øa
1
3 (12.3 N·m)
2
1
3 (12.3 N·m)
2
a
b
e
d
c c
b
f
a
e Piping accessory bag
11.3 Accessory pipes: Diameters
Accessory pipes (mm) HP Øa Øb
Gas pipe
▪ Front connection
▪ Bottom connection
Liquid pipe
▪ Front connection
▪ Bottom connection
8 25.4 19.1
10 22.2
12 28.6
14
16
8 9.5
10
12 9.5 12.7
14 12.7
16
11.4 To remove the transportation stay
Only for 14+16 HP
Model Description
RXYTQ8~16 Single non-continuous heating model.
RXYTQ18~48 Multi non-continuous heating model
(consisting of 2 or 3 RXYTQ modules).
These units are intended for outdoor installation and aimed for heat
pump air to air applications.
These units have (in single use) heating capacities ranging from 25
to 50kW and cooling capacities rating from 22.4 to 45kW. In multi
combination the heating capacity can go up till 150 kW and in
cooling till 135kW.
The outdoor unit is designed to work in heating mode at ambient
temperatures from –20°CWB to 15.5°CWB and in cooling mode at
ambient temperatures from –5°CDB to 52°CDB.
Unit weights
Model Total net weight (kg) Total gross weight (kg)
RXYTQ8 198 211
RXYTQ10 234 251
RXYTQ12 234 251
RXYTQ14 283 300
RXYTQ16 283 300
12.2 System layout
NOTICE
Design of the system must not be done at temperatures
below –15°C.
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
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.
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.
a VRV IV Heat pump outdoor unit
b Refrigerant piping
c VRV direct expansion (DX) indoor unit
d User interface (dedicated depending on indoor unit type)
e User interface (wireless, dedicated depending on indoor
unit type)
f Cool/Heat changeover remote control switch
13 Unit installation
13.1 Preparing the installation site
13.1.1 Installation site requirements of the outdoor unit
Mind the spacing guidelines. See the "Technical data" chapter.
CAUTION
12 About the units and options
12.1 About the outdoor unit
This installation manual concerns the VRV IV, full inverter driven,
heat pump system.
Model line up:
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.
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
Installation and operation manual
13
13 Unit installation
T
AO
(°C WB)
a b
20
15.5
15
10
5
0
–5
–10
–15
–20
10 15 20 25
27
30
T
AI
(°C DB)
14×14×
8 HP 10~16 HP
8 HP
2×
SW8
10~16 HP
6×
SW8
a
b
c
d
e
NOTICE
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.
13.1.2 Additional installation site requirements of the outdoor unit in cold climates
NOTICE
When operating the unit in a low outdoor ambient
temperature with high humidity conditions, make sure to
take precautions to keep the drain holes of the unit free by
using proper equipment.
In heating:
For service purposes, the pushbuttons on the main PCB need to be
accessed. To access these pushbuttons, the electrical component
box cover does not need to be opened. See "To access the field
setting components"[429].
13.2.2 To open the electrical component box of the outdoor unit
NOTICE
Do NOT apply excessive force when opening the
electronic component box cover. Excessive force can
deform the cover, resulting in entering of water to cause
equipment failure.
a Warming up operation range
b Operation range
TAI Ambient indoor temperature
TAO Ambient outdoor temperature
13.2 Opening the unit
13.2.1 To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
Once the front plates open, the electrical component box can be
accessed. See "To open the electrical component box of the outdoor
unit"[414].
Installation and operation manual
14
NOTICE
When closing the electrical component box cover, make
sure that the sealing material on the lower back side of the
cover is NOT caught and bent towards the inside (see
figure below).
a Electrical component box cover
b Front side
c Power supply terminal block
d Sealing material
e Moisture and dirt could enter
NOT allowed
Allowed
13.3 Mounting the outdoor unit
13.3.1 To provide the installation structure
Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
NOTICE
▪ When the installation height of the unit needs to be
increased, do NOT use stands to only support the
corners.
▪ Stands under the unit must be at least 100mm wide.
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
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