Air conditioner
Installation manual
AC***TXAPKG
• Thank you for purchasing this Samsung air conditioner.
• Before operating this unit, please read this manual carefully and retain it for future
reference.
DB68-08482A-01
2 English
Contents
Safety Information 3
General information 3
Installing the unit 4
Preparation of fire extinguisher 5
Ignition sources free 5
Area ventilation 5
Leakage detection methods 6
Labelling 6
Recovery 6
Power supply line, fuse or circuit breaker 6
Installation Procedure 7
Step 1 Choosing the installation location 7
Step 2 Fixing the outdoor unit in place 11
Step 3 Connecting the power cables, communication cable, and controllers 11
Step 4 Optional: Extending the power cable 16
Step 5 Connecting the refrigerant pipe 17
Step 6 Optional: Cutting and flaring the pipes 18
Step 7 Connecting up and removing air in the circuit 19
Step 8 Adding refrigerant (R-32) 20
Step 9 Performing the gas leak test 22
Step 10 Connecting the drain hose to the outdoor unit 22
Step 11
Insulating the refrigerant pipes 23
Step 12 Checking the earthing 23
Step 13 Performing final check and trial operation 24
Extra procedures 27
Pumping down refrigerant 27
Relocating the indoor and outdoor units 27
Using the stop valve 27
Maintenance procedures 29
Performing the gas leak tests for repair 29
Decommissioning 29
Appendix 30
Troubleshooting 30
3English
Safety Information
WARNING
• Hazards or unsafe practices that may result in severe
personal injury or death.
CAUTION
• Hazards or unsafe practices that may result in minor
personal injury or property damage.
Carefully follow the precautions listed below because
they are essential to guarantee the safety of the
equipment.
WARNING
• Always disconnect the air conditioner from the power
supply before servicing it or accessing its internal
components.
• Verify that installation and testing operations are
performed by qualified personnel.
• Verify that the air conditioner is not installed in an
easily accessible area.
General information
WARNING
• Carefully read the content of this manual before
installing the air conditioner and store the manual in
a safe place in order to be able to use it as reference
after installation.
• For maximum safety, installers should always
carefully read the following warnings.
• Store the operation and installation manual in a safe
location and remember to hand it over to the new
owner if the air conditioner is sold or transferred.
• This manual explains how to install an indoor unit
with a split system with two SAMSUNG units. The use
of other types of units with different control systems
may damage the units and invalidate the warranty.
The manufacturer shall not be responsible for
damages arising from the use of non compliant units.
• The manufacturer shall not be responsible for damage
originating from unauthorized changes or the
improper connection of electric and requirements set
forth in the “Operating limits” table, included in the
manual, shall immediately invalidate the warranty.
• The air conditioner should be used only for the
applications for which it has been designed: the
indoor unit is not suitable to be installed in areas
used for laundry.
• Do not use the units if damaged. If problems occur,
switch the unit off and disconnect it from the power
supply.
• In order to prevent electric shocks, fires or injuries,
always stop the unit, disable the protection switch
and contact SAMSUNG’s technical support if the unit
produces smoke, if the power cable is hot or damaged
or if the unit is very noisy.
• Always remember to inspect the unit, electric
connections, refrigerant tubes and protections
regularly. These operations should be performed by
qualified personnel only.
• The unit contains moving parts, which should always
be kept out of the reach of children.
• Do not attempt to repair, move, alter or reinstall the
unit. If performed by unauthorized personnel, these
operations may cause electric shocks or fires.
• Do not place containers with liquids or other objects
on the unit.
• All the materials used for the manufacture and
packaging of the air conditioner are recyclable.
• The packing material and exhaust batteries of the
remote controller(optional) must be disposed of in
accordance with current laws.
• The air conditioner contains a refrigerant that has
to be disposed of as special waste. At the end of its
life cycle, the air conditioner must be disposed of in
authorized centres or returned to the retailer so that
it can be disposed of correctly and safely.
• Do not use means to accelerate the defrost operation
or to clean, other than those recommended by
Samsung.
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
Safety Information
Safety Information
4
Safety Information
English
Safety Information
• This appliance is not intended for use by persons
(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a
person responsible for their safety. Children should
be supervised to ensure that they do not play with
the appliance.
• For use in Europe: This appliance can be used by
children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities
or lack of experience and knowledge if they have
been given supervision or instruction concerning use
of the appliance in a safe way and understand the
hazards involved. Children shall not play with the
appliance. Cleaning and user maintenance shall not be
made by children without supervision.
Installing the unit
WARNING
IMPORTANT: When installing the unit, always remember
to connect first the refrigerant tubes, then the electrical
lines.
• Upon receipt, inspect the product to verify that
it has not been damaged during transport. If the
product appears damaged, DO NOT INSTALL it and
immediately report the damage to the carrier or
retailer (if the installer or the authorized technician
has collected the material from the retailer.)
• After completing the installation, always carry out a
functional test and provide the instructions on how to
operate the air conditioner to the user.
• Do not use the air conditioner in environments with
hazardous substances or close to equipment that
release free flames to avoid the occurrence of fires,
explosions or injuries.
• Our units should be installed in compliance with the
spaces shown in the installation manual, to ensure
accessibility from both sides and allow repairs
or maintenance operations to be carried out. The
unit’s components should be accessible and easy to
disassemble without endangering people and objects.
• For this reason, when provisions of the installation
manual are not complied with, the cost required to
access and repair the units (in SAFETY CONDITIONS,
as set out in prevailing regulations) with harnesses,
ladders, scaffolding or any other elevation system
will NOT be considered part of the warranty and will
be charged to the end customer.
• The outdoor unit shall be installed in an open space
that is always ventilated.
• The local gas regulations shall be observed.
• To handle, purge, and dispose the refrigerant, or
break into the refrigerant circuit, the worker should
have a certificate from an industry-accredited
authority.
• While in installation or relocation of the product, do
not mix the refrigerant with other gases including air
or unspecified refrigerant. Failure to do so may cause
pressure increase to result in rupture or injury.
• Do not cut or burn the refrigerant container or
pipings.
• Use clean parts such as manifold gauge, vacuum
pump, and charging hose for the refrigerant.
• Installation must be carried out by qualified personnel
for handling the refrigerant. Additionally, reference
the regulations and laws.
• Be careful not to let foreign substances (lubricating
oil, refrigerant, water, etc.) enter the pipings.
• When mechanical ventilation is required, ventilation
openings shall be kept clear of obstruction.
• For disposal of the product, follow the local laws and
regulations.
• Do not work in a confined place.
• The work area shall be blocked.
• The refrigerant pipings shall be installed in the
position where there are no substances that may
result in corrosion.
• The following checks shall be performed for
installation:
– The charging amount depends on the room size.
– The ventilation devices and outlets are operating
normally and are not obstructed.
– Markings and signs on the equipment shall be
visible and legible.
• Upon leakage of the refrigerant, ventilate the room.
When the leaked refrigerant is exposed to flame, it
may cause generation of toxic gases.
5English
Safety Information
• Make sure that the work area is safe from flammable
substances.
• To purge air in the refrigerant, be sure to use a
vacuum pump.
• Note that the refrigerant has no odour.
• The units are not explosion proof so they must be
installed with no risk of explosion.
• This product contains fluorinated gases that
contribute to global greenhouse effect. Accordingly,
do not vent gases into the atmosphere.
• For installation with handling the refrigerant(R-32),
use dedicated tools and piping materials. Working
pressure of R-32 is higher than R410A, So failure to
use the dedicated tools and piping materials may
cause rupture or injury. Furthermore, it may cause
serious accidents such as water leakage, electric
shock or fire.
• Servicing shall be performed as recommended by the
manufacturer. In case other skilled persons are joined
for servicing, it shall be carried out under supervision
of the person who is competent in handling
flammable refrigerants.
• For servicing the units containing flammable
refrigerants, safety checks are required to minimise
the risk of ignition.
• Servicing shall be performed following the controlled
procedure to minimize the risk of flammable
refrigerant or gases.
• Do not install where there is a risk of combustible gas
leakage.
• Do not place heat sources.
• Be cautious not to generate a spark as follows:
– Do not remove the fuses with power on.
– Do not disconnect the power plug from the wall
outlet with power on.
– It is recommended to locate the outlet in a high
position. Place the cords so that they are not
tangled.
• If the indoor unit is not R-32 compatible, an error
signal appears and the unit will not operate.
• After installation, check for leakage. Toxic gas may
be generated and if it comes into contact with an
ignition source such as fan heater, stove, and cooker,
cylinders, make sure that only the refrigerant
recovery cylinders are used.
• Never directly touch any accidental leaking
refrigerant. It could result in severe wounds caused
by frostbite.
Preparation of fire extinguisher
• If a hot work is to be done, an appropriate fire
extinguishing equipment should have been available.
• A dry powder or CO2 fire extinguisher shall be
equipped near the charging area.
Ignition sources free
• Make sure to store the units in a place without
continuously operating ignition sources (for example,
open flames, an operating gas appliance or an
operating electric heater).
• The service engineers shall not use any ignition
sources with the risk of fire or explosion.
• Potential ignition sources shall be kept away from
the work area where the flammable refrigerant can
possibly be released to the surrounding.
• The work area should be checked to ensure that there
are no flammable hazards or ignition risks. The “No
Smoking” sign shall be attached.
• Under no circumstances shall potential sources of
ignition be used while in detection of leakage.
• Make sure that the seals or sealing materials have not
degraded.
• Safe parts are the ones with which the worker can
work in a flammable atmosphere. Other parts may
result in ignition due to leakage.
• Replace components only with parts specified by
Samsung. Other parts may result in the ignition of
refrigerant in the atmosphere from a leak.
Area ventilation
• Make sure that the work area is well ventilated before
performing a hot work.
• Ventilation shall be made even during the work.
• The ventilation should safely disperse any released
gases and preferably expel them into the atmosphere.
• Ventilation shall be made even during the work.
6
Safety Information
English
Safety Information
Leakage detection methods
• The leakage detector shall be calibrated in a
refrigerant-free area.
• Make sure that the detector is not a potential source
of ignition.
• The leakage detector shall be set to the LFL (lower
flammability limit).
• The use of detergents containing chlorine shall be
avoided for cleaning because the chlorine may react
with the refrigerant and corrode the pipings.
• If leakage is suspected, naked flames shall be
removed.
• If a leakage is found while in brazing, the entire
refrigerant shall be recovered from the product or
isolated (e.g. using shut-off valves). It shall not be
directly released to the environment. Oxygen free
nitrogen (OFN) shall be used for purging the system
before and during the brazing process.
• The work area shall be checked with an appropriate
refrigerant detector before and during work.
• Ensure that the leakage detector is appropriate for
use with flammable refrigerants.
Labelling
• The parts shall be labelled to ensure that they have
been decommissioned and emptied of refrigerant.
• The labels shall be dated.
• Make sure that the labels are affixed on the system to
notify it contains flammable refrigerant.
Recovery
• When removing refrigerant from the system for
servicing or decommissioning, it is recommended to
remove the entire refrigerant.
• When transferring refrigerant into cylinders, make
sure that only the refrigerant recovery cylinders are
used.
• All cylinders used for the recovered refrigerant shall
be labelled.
• Cylinders shall be equipped with pressure relief
valves and shut-off valves in a proper order.
• Empty recovery cylinders shall be evacuated and
cooled before recovery.
• The recovery system shall operate normally according
to the specified instructions and shall be suitable for
refrigerant recovery.
• In addition, the calibration scales shall operate
normally.
• Hoses shall be equipped with leak-free disconnect
couplings.
• Before starting the recovery, check for the status of
the recovery system and sealing state. Consult with
the manufacturer if suspected.
• The recovered refrigerant shall be returned to the
supplier in the correct recovery cylinders with the
Waste Transfer Note attached.
• Do not mix refrigerants in the recovery units or
cylinders.
• If compressors or compressor oils are to be removed,
make sure that they have been evacuated to the
acceptable level to ensure that flammable refrigerant
does not remain in the lubricant.
• The evacuation process shall be performed before
sending the compressor to the suppliers.
• Only the electrical heating to the compressor body is
allowed to accelerate the process.
• Oil shall be drained safely from the system.
• For installation with handling the refrigerant (R-32),
use dedicated tools and piping materials. Because the
pressure of the refrigerant, R-32 is approximately
1.6 times higher than that of R-22, failure to use
the dedicated tools and piping materials may cause
rupture or injury. Furthermore, it may cause serious
accidents such as water leakage, electric shock, or fire.
• Never install a motor-driven equipment to prevent
ignition.
Power supply line, fuse or circuit
breaker
WARNING
• Always make sure that the power supply is compliant
with current safety standards. Always install the air
conditioner in compliance with current local safety
standards.
• Always verify that a suitable earthing connection is
available.
• Verify that the voltage and frequency of the power
supply comply with the specifications and that the
7English
Installation Procedure
installed power is sufficient to ensure the operation
of any other domestic appliance connected to the
same electric lines.
• Always verify that the cut-off and protection switches
are suitably dimensioned.
• Verify that the air conditioner is connected to the
power supply in accordance with the instructions
provided in the wiring diagram included in the
manual.
• Always verify that electric connections (cable entry,
section of leads, protections…) are compliant with
the electric specifications and with the instructions
provided in the wiring scheme. Always verify that all
connections comply with the standards applicable to
the installation of air conditioners.
• Devices disconnected from the power supply should
be completely disconnected in the condition of
overvoltage category.
• Be sure not to perform power cable modification,
extension wiring, and multiple wire connection.
– It may cause electric shock or fire due to poor
connection, poor insulation, or current limit
override.
– When extension wiring is required due to power
line damage, refer to "Step 4 Optional: Extending
the power cable" in the installation manual.
Step 1 Choosing the installation
location
WARNING
• If appliances contain R-32 refrigerant, then the floor
area of the room in which the appliances are installed,
operated and stored must be larger than the minimum
floor area defined in table below A (m²).
Minimum required room area (A, m²)
m (kg)
Ceiling-mounted
type
Wall-mounted
type
Floor-standing
type
≤ 1.842 No requirement
1.843 3.64 4.45 28.9
1.9 3.75 4.58 30.7
2.0 3.95 4.83 34.0
2.2 4.34 5.31 41.2
2.4 4.74 5.79 49.0
2.6 5.13 6.39 57.5
2.8 5.53 7.41 66.7
3.0 5.92 8.51 76.6
3.2 6.48 9.68 87.2
3.4 7.32 10.9 98.4
3.6 8.20 12.3 110
3.8 9.14 13.7 123
4.0 10.1 15.1 136
4.2 11.2 16.7 150
4.4 12.3 18.3 165
4.6 13.4 20.0 180
4.8 14.6 21.8 196
5.0 15.8 23.6 213
• m : Total refrigerant charge in the system
• A :
Minimum required room area
• IMPORTANT: it’s mandatory to consider either the
table 1 or taking into consideration the local law
regarding the minimum living space of the premises.
• Minimum installation height of indoor unit is 0.6 m
for floor mounted, 1.8 m for wall, 2.2 m for ceiling.
Installation location requirements
• The outdoor unit shall be installed in an open space
that is always ventilated.
• The local gas regulations shall be observed.
• For installation inside a building (this applies either to
indoor or outdoor units installed inside) a minimum
room floor area of space conditioned is mandatory
according to EN378-1:2017 (see the reference table
into the indoor unit installation manual).
Installation Procedure
8
Installation Procedure
English
Installation Procedure
Installation Procedure
Installation Procedure
• To handle, purge, and dispose the refrigerant, or
break into the refrigerant circuit, the worker should
have a certificate from an industry-accredited
authority.
• Do not install the air conditioner in following areas.
– The place where there is mineral oil or arsenic
acid. Resin parts flame and the accessories may
drop or water may leak. The capacity of the heat
exchanger may reduce or the air conditioner may
be out of order.
– The place where corrosive gas such as sulfurous
acid gas generates from the vent pipe or air outlet.
The copper pipe or connection pipe may corrode
and refrigerant may leak.
– The place where there is a machine that generates
electromagnetic waves. The air conditioner may
not operate normally due to control system.
– The place where there is a danger of existing
combustible gas, carbon fiber or flammable dust.
– The place where animals may urinate on the
product. Ammonia may be generated.
– The place where thinner or gasoline is handled.
Gas may leak and it may cause fire.
– The place where is close to heat sources
• Do not use the indoor unit for preservation of food
items, plants, equipment, and art works. This may
cause deterioration of their quality.
• Do not install the indoor unit if it has any drainage
problem.
• Do not place the outdoor unit on its side or upside
down. Failing to do so may cause the compressor
lubrication oil to run into the cooling circuit and lead
to a serious damage to the unit.
• Install the unit in a well-ventilated location away
from direct sunlight or strong winds.
• Install the unit in a location that would not obstruct
any passageways or thoroughfares.
• Install the unit in a location that would not
inconvenience or disturb your neighbors, as they
could be affected by the noise or the airflow coming
from the unit.
• Install the unit in a location where the pipes and the
cables can be easily connected to the indoor unit.
• Install the unit on a flat, stable surface that can
withstand the weight of the unit. Otherwise, the unit
can generate noise and vibration during operation.
• Install the unit so that the air flow is directed towards
the open area.
• Maintain sufficient clearance around the outdoor unit,
especially from a radio, computer, stereo system, etc.
Fuse
Fuse
Control
1.5 m or more
1 m or more
1 m or more
1.5 m or more
1.5 m or more
300 mm
Stereo
Computer etc
Outdoor Unit
200 mm
Air Guide Duct (This product is not provided by Samsung)
Indoor Unit
• Install the unit at a height where its base can be
firmly fixed in place.
• Make sure that the water dripping from the drain
hose runs away correctly and safely.
CAUTION
• You have just purchased a system air conditioner
and it has been installed by your installation
specialist.
• This device must be installed according to the
national electrical rules.
• If your outdoor unit exceeds a net weight of 60 kg,
do not install it on a suspended wall, but stand it
on a floor.
• When installing the outdoor unit at the seaside, make
sure that it is not directly exposed to sea breeze. If
you cannot find an adequate place free from direct
sea breeze, construct a protection wall or a protective
fence.
– Install the outdoor unit in a place (such as near
buildings etc.) where it can be prevented from sea
breeze. Failure to do so may cause a damage to
the outdoor unit.
Sea breeze Sea breeze
Sea Sea
Outdoor Unit Outdoor Unit
9English
Installation Procedure
• If you cannot avoid installing the outdoor unit at the
seaside, construct a protection wall around to block
the sea breeze.
• Construct a protection wall with a solid material such
as concrete to block the sea breeze. Make sure that
the height and the width of the wall are 1.5 times
larger than the size of the outdoor unit. Also, secure
a space larger than 700 mm between the protection
wall and the outdoor unit for exhausted air to
ventilate.
Protection wall
Outdoor Unit
Sea breeze
Sea
CAUTION
• Depending on the condition of power supply, unstable
power or voltage may cause malfunction of the parts
or control system. (At the ship or places using power
supply from electric generator...etc)
• Install the unit in a place where water can drain
smoothly.
• If you have any difficulty finding installation location
as prescribed above, contact your manufacturer for
details.
• Be sure to clean the sea water and the dust on the
heat exchanger of the outdoor unit and apply a
corrosion inhibitor on it. (At least once in a year.)
• Check the condition of the product periodically.
– Check the installation site every 3 months and
perform anti-corrosion treatment such as R-Pro
supplied by SAMSUNG (Code : MOK-220SA) or
commercial water repellent grease and wax,
etc.,based on the product condition.
– When the product is to be shut down for a long
period of time, such as off-peak hours, take
appropriate measures like covering the product.
• If the product installed within 500m of seashore,
special anti-corrosion treatment is required.
Please contact your local SAMSUNG representative
for further details.
Outdoor unit dimensions
(Unit: mm)
A Type
AC026TXAPKG/AC035TXAPKG
285
790
50
551.7
12
60
548
336
B Type
AC052TXAPKG/ AC060TXAPKG/ AC071TXAPKG
880
53
310
798
364
660
12
26
Minimum clearances for the outdoor unit
When installing 1 outdoor unit
(Unit: mm)
150 or more
500 or more
150 or
more
150 or
more
150 or
more
1000
or more
1000
or more
500
or more
150
or more
1000
or more
150 or
more
10
Installation Procedure
English
Installation Procedure
When installing more than 1 outdoor unit
(Unit: mm)
1000
or more
200
or more
2000
or more
3000
or more
150
or more
150
or more
150
or more
1500
or more
300
or more
1000
or more
300
or more
150
or more
150
or more
200
or more
300
or more
300 or more
300 or more
500 or more 500 or more
CAUTION
• The outdoor unit must be installed according to the
specified distances in order to permit accessibility
from each side, to guarantee correct operation,
maintenance, and repair of the unit.
The components of the outdoor unit must be
reachable and removable under safe conditions for
people and the unit.
WARNING
• Should adopt bar type louver. Don’t use a type of rain
resistance louver.
[Bar type louver] [Rain resistance louver]
• Louver specifications.
– Angle criteria : less than 20˚
– Opening ratio criteria : greater than 80%
Moving the outdoor unit with wire rope
1 Before carrying the outdoor unit, fasten two wire
ropes of 8 m or longer, as shown in the figure.
2 To prevent damages or scratches effectively, insert
a piece of cloth between the outdoor unit and the
ropes.
3 Move the outdoor unit.
Wire rope
Plate protection
cloth
11English
Installation Procedure
Step 2 Fixing the outdoor unit in place
Install the outdoor unit on a rigid and stable base to
prevent disturbance from any noise caused by vibration.
When installing the unit at a height or in a location
exposed to strong winds, fix the unit securely to a
support (i.e., a wall or a ground).
Fix the outdoor unit with anchor bolts. Make sure that
the anchor bolts are 20 mm or higher from the base
surface.
AC026/035TXAPKG
601.7
790
285
310
336
Anchor bolt hole
AC052/060/071TXAPKG
Anchor bolt hole
(Unit : mm)
CAUTION
• Install a drain outlet at the lowest end around the
base for outdoor unit drainage
• When installing the outdoor unit on the roof,
waterproof the unit and check the ceiling strength.
• Make sure that the wall can support the weights of
the rack and the outdoor unit.
• Install the rack close to the column as much as
possible.
Optional: Fixing the outdoor unit to a wall with
a rack
Soft rubber designed to cut off vibration from
rack to wall. (not supplied with product)
Designed to cut off residual vibration from
outdoor unit to rack. (not supplied with product)
Anchor bolt
Base surface
20 mm
• Install a proper grommet in order to reduce noise and
residual vibration transferred by the outdoor unit
towards the wall.
CAUTION
• When installing an air guide duct, be sure to check
the following:
– The screws do not damage the copper pipe.
– The air guide duct is fixed firmly on the guard fan.
Step 3 Connecting the power cables,
communication cable, and controllers
You must connect the following three electrical cables to
the outdoor unit:
• The main power cable between the auxiliary circuit
breaker and the outdoor unit.
• The outdoor-to-indoor power cable between the
outdoor unit and the indoor unit.
• The communication cable between the outdoor unit
and the indoor unit.
CAUTION
• During installation, make first the refrigerant
connections and then the electrical connections. If
the unit is uninstalled, first disconnect the electrical
cables and then the refrigerant connections.
• Connect the air conditioner to the earthing system
before making the electrical connections.
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Installation Procedure
English
Installation Procedure
NOTE
• Especially, if your outdoor unit is the one designed
for Russian and European markets, consult the supply
authority, if necessary, to estimate and reduce the
supply system impedance before installation.
Air conditioning system examples
When using earth leakage circuit breaker (ELCB) for a
single phase
Communication cable
Outdoor-to-indoor power cable
ELCB
1
OR
Indoor Unit
Main power cable
Outdoor Unit
Communication cable
Earthing
CAUTION
• If the outdoor unit is installed in a location vulnerable
to an electric leak or submergence, make sure to
install an ELCB.
• For the product that uses the R-32 refrigerant, be
cautious not to generate a spark by keeping the
following requirements:
– Do not remove the fuses with power on.
– Do not disconnect the power plug from the wall
outlet with power on.
– It is recommended to locate the outlet in a high
position. Place the cords so that they are not
tangled.
Connecting the main power cable
When using ELB for 1 phase
The appearance of the unit may be
different from the picture depending
on the model.
1(L) 2(N)
N
L
ELB
MCCB
Power Supply
Electrical
component box
Indoor Unit
Outdoor-to-
indoor power
cable
Communication
cable
Main power cable
Cable clamp
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Installation Procedure
CAUTION
• You should connect the power cable into the power
cable terminal and fasten it with a clamp.
• The unbalanced power must be maintained within 2%
of supply rating.
If the power is unbalanced greatly, it may shorten
the life of the condenser. If the unbalanced power
is exceeded over 4% of supply rating, the indoor
unit is protected, stopped and the error mode
indicates.
• To protect the product from water and possible shock,
you should keep the power cable and the connection
cord of the indoor and outdoor units within ducts.
(with appropriate IP rating and material selection for
your application)
• Ensure that main supply connection is made through
a switch that disconnects all poles, with contact gap
of a least 3 mm.
• Devices disconnected from the power supply should
be completely disconnected in the condition of
overvoltage category.
• Keep distances of 50 mm or more between power
cable and communication cable.
Main power terminal block specifications
1(L) 2(N) L N
AC power:
M4 screw
Comunication:
M4 screw
F1 F2
Main power cable specifications
The power cable is not supplied with air conditioner.
• Select the power supply cable in accordance with relevant local and national regulations.
• Wire size must comply with the applicable local and national code.
• Specifications for local wiring power cord and branch wiring are in compliance with local cord.
Type
Model Outdoor unit Input current (Amperes) Power supply
Indoor unit Outdoor unit
Rated
Voltage range
Outdoor unit
Indoor
unit
Total MCA MFA
Hz Volts Min
.
Max
.
Cooling Heating
A
AC026TNNDKG
AC026TXAPKG
50 220 to 240 198 264 10.0 10.0 1.5 11.5 11.5 12.7
AC035TNNDKG
AC035TXAPKG
50 220 to 240 198 264 10.0 10.0 1.5 11.5 11.5 12.7
B
AC052TNNDKG
AC052TXAPKG
50 220 to 240 198 264 16.5 16.5 1.5 18.0 18.0 20.6
AC052TNHDKG
AC052TXAPKG
50 220 to 240 198 264 16.5 16.5 2.3 18.8 18.8 20.7
AC060TNNDKG
AC060TXAPKG
50 220 to 240 198 264 16.5 16.5 1.5 18.0 18.0 20.6
AC071TN4DKG
AC071TXAPKG
50 220 to 240 198 264 16.5 16.5 1.5 18.0 18.0 20.6
AC071TN4PKG
AC071TXAPKG
50 220 to 240 198 264 16.5 16.5 1.5 18.0 18.0 20.6
AC071TNHDKG
AC052TXAPKG
50 220 to 240 198 264 16.5 16.5 2.3 18.8 18.8 20.7
14
Installation Procedure
English
Installation Procedure
NOTE
1 Voltage range
• Units are suitable for use on electrical systems
where voltage supplied to unit terminal is not
below or above listed range limits
2 Maximum allowable voltage variation between
phases is 2%.
3 Wire size & type must comply with the applicable
local and national code.
• Wire size: Based on the value of MCA.
• Wire type: 60245 IEC57(IEC) or H05RN-
F(CENELEC) grade or more.
4 MFA is used to select the circuit breaker and the
ground fault circuit interrupter (earth leakage circuit
breaker).
5 MCA represents maximum input current.
• MFA represents capacity which may accept MCA
• Abbreviations
MCA: Min. Circuit Amps. (A)
MFA: Max. Fuse Amps. (A)
Connecting the outdoor-to-indoor power cable
and the communication cable
For connecting the power and
communication cables
1(L) 2(N)
N
L
Indoor Unit
Main power cable
Cable clamp
Outdoor-to-
indoor power
cable
Communication cable
1(L)
F2
F1
2(N)
NOTE
• Lay the electrical wiring so that the front cover does
not rise up when doing wiring work and attach the
front cover securely.
• Ground wire for the indoor unit and outdoor unit
connection cable must be clamped to a soft copper
tin-plated eyelet terminal with M4 screw hole(NOT
SUPPLIED WITH UNIT ACCESSORIES).
DRED wiring diagram
COMMON
DRM3
DRM2
DRM1
DRED Controller
Outdoor-to-indoor power terminal
specifications
• Connect the cables to the terminal board using the
compressed ring terminal.
• Cover a solderless ring terminal and a connector part
of the power cable and then connect it.
Silver solder
15English
Installation Procedure
Nominal
dimensions
for cable
(mm²)
Nominal
dimensions
for screw
(mm)
B D d1 E F L d2 t
Standard
dimension
(mm)
Allowance
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Min.
(mm)
Min.
(mm)
Max.
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Min.
(mm)
4/6
4 9.5
±0.2 5.6
+0.3
-0.2
3.4 ±0.2 6
5 20 4.3
+0.2
0
0.9
8 15 9 28.5 8.4
+0.4
0
10 8 15 ±0.2 7.1
+0.3
-0.2
4.5 ±0.2 7.9 9 30 8.4
+0.4
0
1.15
16 8 16 ±0.2 9
+0.3
-0.2
5.8 ±0.2 9.5 13 33 8.4
+0.4
0
1.45
25
8 12
±0.3 11.5
+0.5
-0.2
7.7 ±0.2 11
15
34
8.4
+0.4
0
1.7
8 16.5 13 8.4
35
8 16
±0.3 13.3
+0.5
-0.2
9.4 ±0.2 12.5
13 38 8.4
+0.4
0
1.8
8 22 13 43 8.4
50 8 22 ±0.3 13.5
+0.5
-0.2
11.4 ±0.3 17.5 14 50 8.4
+ 0.4
0
1.8
70 8 24 ±0.4 17.5
+0.5
-0.4
13.3 ±0.4 18.5 20 51 8.4
+ 0.4
0
2.0
• Connect the rated cables only.
• Connect using a driver which is able to apply the
rated torque to the screws.
• If the terminal is loose, fire may occur caused by arc.
If the terminal is connected too firmly, the terminal
may be damaged.
Tightening torque (kgf • cm)
M4 12.0 to 18.0
M5 20.0 to 30.0
• 1N · m = 10 kgf · cm
CAUTION
• When connecting cables, you can connect the cables
to the electrical part or connect them through the
holes below depending on the spot.
• Connect the communication cable between the
indoor and outdoor units through a conduit to protect
against external forces, and feed the conduit through
the wall together with refrigerant piping.
• Remove all burrs at the edge of the knock-out hole
and secure the cable to the outdoor knock-out using
lining and bushing with an electrical insulation such
as rubber and so on.
• Must keep the cable in a protection tube.
• Keep distances of 50mm or more between power
cable and communication cable.
• When the cables are connected through the hole,
remove the Plate bottom.
Outdoor-to-indoor power and communication
cables specifications
Indoor power supply
Power supply Max/Min (V) Indoor power cable
1Φ, 220-240V,
50 Hz
±10%
0.75 to 1.5 mm², 3
wires
Communication cable
0.75 mm², 2 wires
• Power supply cords of parts of appliances for
outdoor use shall not be lighter than polychloroprene
sheathed flexible cord. (Code designation IEC:60245
IEC 57 / CENELEC: H05RN-F or IEC:60245 IEC 66 /
CENELEC: H07RN-F)
• When installing the indoor unit in a computer room
or net work room, use the double shielded (tape
aluminium / polyester braid + copper ) cable of
FROHH2R type.
16
Installation Procedure
English
Installation Procedure
Step 4 Optional: Extending the power
cable
1 Prepare the following tools.
Tools Spec Shape
Crimping pliers MH-14
Connection sleeve
(mm)
20xØ6.5
(HxOD)
Insulation tape
Width 19
mm
Contraction tube
(mm)
70xØ8.0
(LxOD)
2 As shown in the figure, peel off the shields from the
rubber and wire of the power cable.
• Peel off 20 mm of cable shields from the pre-
installed tube.
CAUTION
• For information about the power cable
specifications for indoor and outdoor units, refer
to the installation manual.
• After peeling off cable wires from the pre-installed
tube, insert a contraction tube.
Power cable
Pre-installed tube for the power cable
(Unit: mm)
(Unit: mm)
20 20
20
20
60
120
180
3 Insert both sides of core wire of the power cable into
the connection sleeve.
• Method 1: Push the core wire into the sleeve from
both sides.
• Method 2: Twist the wire cores together and push
it into the sleeve.
Connection sleeve Connection sleeve
Method 1 Method 2
4 Using a crimping tool, compress the two points and
flip it over and compress another two points in the
same location.
• The compression dimension should be 8.0.
Compression
dimension
• After compressing it, pull both sides of the wire to
make sure it is firmly pressed.
Compress it 4 times.
5 mm
Compress it 4 times.
5 mm
Method 1 Method 2
5 Wrap it with the insulation tape twice or more and
position your contraction tube in the middle of the
insulation tape.
Three or more layers of insulation are required.
Method 1 Method 2
Insulation tape
40 mm
35 mm
Insulation tape
6 Apply heat to the contraction tube to contract it.
Contraction tube
17English
Installation Procedure
7 After tube contraction work is completed, wrap it with
the insulation tape to finish.
Insulation tape
CAUTION
• Make sure that the connection parts are not exposed
to outside.
• Be sure to use insulation tape and a contraction tube
made of approved reinforced insulating materials that
have the same level of withstand voltage with the
power cable. (Comply with the local regulations on
extensions.)
WARNING
• In case of extending the electric wire, please DO NOT
use a round-shaped Pressing socket.
– Incomplete wire connections can cause electric
shock or a fire.
Step 5 Connecting the refrigerant pipe
Items
Maximum allowable length
Single installation
Applicable outdoor unit
models
AC026TXAPKG
AC035TXAPKG
AC052TXAPKG
AC060TXAPKG
AC071TXAPKG
Main pipe (L
1
)
20 50
Max. height difference
between outdoor and
indoor units (h
1
)
15 30
n=1
indoor
Outdoor
indoor
Outdoor
indoor
n=2
L
1
h
1
L
1
L
2
L
3
h
2
h
1
D
• Temper grade and minimum thickness of the
refrigerant pipe
Outer diameter
[mm]
Minimum
thickness [mm]
Temper grade
ø6.35 0.7
C1220T-O
ø9.52 0.7
ø12.70 0.8
ø15.88 1.0
ø15.88 0.8
C1220T-1/2H OR
C1220T-H
ø19.05 0.9
ø22.23 0.9
CAUTION
• Be sure to use C1220T-1/2H (Semi-hard) pipe for
more than Ø19.05 mm. If you use C1220T-O (Soft)
pipe for Ø19.05 mm, the pipe may be broken, which
can result in an injury.
Make at least one round:
It will reduce noise and vibration
• The appearance of the unit may be different from the
diagram depending on the model.
CAUTION
• After connecting the pipes with knock-out treatment,
plug the space around the pipes.
• After connecting the pipes, proceed exactly as
directed in the guide to prevent interference with the
internal parts.
18
Installation Procedure
English
Installation Procedure
• Tighten the nuts to the specified torques. If
overtightened, the nuts could be broken so
refrigerant may leak.
• Protect or enclose refrigerant tubing to avoid
mechanical damage.
Step 6 Optional: Cutting and aring the
pipes
1 Make sure that you have the required tools available.
(pipe cutter, reamer, flaring tool, and pipe holder)
2 If you wish to shorten the pipes, cut it with a pipe
cutter, taking care to ensure that the cut edge remains
at a 90° angle with the side of the pipe. Refer to
the illustrations below for examples of edges cut
correctly and incorrectly.
90°
Oblique
Rough Burr
3 To prevent any gas from leaking out, remove all burrs
at the cut edge of the pipe, using a reamer.
4 Slide a flare nut on to the pipe and modify the flare.
D
A
D
45° ±2°
90° ±2°
Pipe
Flare
Flare
R 0.4 to 0.8 mm
L
Outer diameter (D) Depth (A) Flare dimension (L)
ø6.35 mm 14 to 18 8.7 to 9.1 mm
ø9.52 mm 34 to 42 12.8 to 13.2 mm
ø12.70 mm 49 to 61 16.2 to 16.6 mm
ø15.88 mm 68 to 82 19.3 to 19.7 mm
ø19.05 mm 100 to 120 23.6 to 24.0 mm
• 1 N·m = 10 kgf·cm
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
3
2
1
Correct Inclined Damaged
Surface
Cracked Uneven
Thickness
CAUTION
• Keep the piping length at a minimum to minimize the
additional refrigerant charge due to piping extension.
• When connecting the pipes, make sure that
surrounding objects do not interfere with or contact
them to prevent refrigerant leakage due to physical
damage.
• Make sure that the spaces where the refrigerant pipes
are installed comply with national gas regulations.
• Be sure to perform works such as additional
refrigerant charging and pipe welding under the
conditions of good ventilation.
• Be sure to perform welding and piping works for
mechanical connections under the conditions that the
refrigerant does not circulate.
• When reconnecting the pipes, make sure to perform
flared-jointing newly to prevent refrigerant leakage.
• When working on the refrigerant pipes and the
flexible refrigerant connectors, be careful that they
are not damaged physically by surrounding objects.
• For installation with handling the R-32 refrigerant,
use the special tools for the R32 refrigerant (manifold
gauge, vacuum pump, charging hose, etc.).
• During tests never pressurize the appliances with
a pressure higher than the maximum allowable
pressure(as indicated on the nameplate of the unit).
• Never directly touch any accidental leaking
refrigerant. This could result in severe wounds caused
by frostbite.
• Never install a dryer to this unit in order to guarantee
its lifetime.
19English
Installation Procedure
• If the pipes require brazing ensure that OFN(Oxygen
Free Nitrogen) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 to 0.05 MPa.
• If you need a pipe longer than specified in piping
codes and standards, you must add refrigerant to the
pipe. Otherwise, the indoor unit may freeze.
• While removing burrs, put the pipe face down to
make sure that the burrs do not get in to the pipe.
Step 7 Connecting up and removing air
in the circuit
CAUTION
• When installing, make sure there is no leakage. When
recovering the refrigerant, ground the compressor
first before removing the connection pipe. If the
refrigerant pipe is not properly connected and the
compressor works with the service valve open, the
pipe inhales the air and it makes the pressure inside
of the refrigerant cycle abnormally high. It may cause
explosion and injury.
The air in the indoor unit and in the pipe must be
evacuated. If air remains in the refrigerant pipes, it will
affect the compressor either reduce cooling/heating
capacity or lead to a malfunction. Refrigerant for air
purging is not charged in the outdoor unit. Use Vacuum
Pump as shown at the right figure.
1 Connect each assembly pipe to the appropriate valve
on the outdoor unit and tighten the flare nut.
2 Referring to the illustration below, tighten the flare
nut on section D first manually and then with a
torque wrench, applying the following torque.
Outdoor Unit
B(Liquid)
A(Gas)
D
C
Outer diameter (mm) Torgue (N • m)
ø6.35 14 to 18
ø9.52 34 to 42
ø12.70 49 to 61
ø15.88 68 to 82
ø19.05 100 to 120
• 1 N·m = 10 kgf·cm
3 Connect the charging hose of low pressure side of
manifold gauge to the packed valve having a service
port as shown at the figure.
CAUTION
• The designs and shape are subject to change
according to the model.
4 Open the valve of the low pressure side(A) of
manifold gauge anticlockwise.
20
Installation Procedure
English
Installation Procedure
A(Gas)
B(liquid)
Vacuum
Pump
5 Purge the air from the system using vacuum pump
for about 10 minutes.
• Close the valve of the low pressure side of
manifold gauge clockwise.
• Make sure that pressure gauge shows -0.1 MPa
(-76 cmHg) after about 1 hour. This procedure is
very important to avoid a gas leak.
• Turn off the vacuum pump.
• Remove the hose of the low pressure side of
manifold gauge.
6 Open the stop valve of both liquid and gas sides.
7 Mount the valve stem nuts and the service port
cap to the valve, and tighten them at the torque of
183kgf•cm with a torque wrench.
8 Check for gas leakage.
• At this time, especially check for gas leakage from
the 3-way valve’s stem nuts(A port), and from the
service port cap.
CAUTION
• Connect the indoor and outdoor units using pipes
with flared connections (not supplied). For the lines,
use insulated, unwelded, degreased and deoxidized
copper pipe, (Cu DHP type to ISO 1337 or UNI EN
12735-1), suitable for operating pressures of at least
4200 kPa and for a burst pressure of at least 20700
kPa. Copper pipe for hydro-sanitary applications is
completely unsuitable.
• For sizing and limits (height difference, line length,
max. bends, refrigerant charge, etc.) see “Connecting
refrigerant pipe section”.
Step 8 Adding refrigerant (R-32)
Precautions on adding the R-32 refrigerant
In addition to the conventional charging procedure, the
following requirements shall be kept.
• Make sure that contamination by other refrigerants
does not occur for charging.
• To minimize the amount of refrigerant, keep the
hoses and lines as short as possible.
• The cylinders shall be kept upright.
• Make sure that the refrigeration system is earthed
before charging.
• Label the system after charging, if necessary.
• Extreme care is required not to overcharge the
system.
• Before recharging, the pressure shall be checked with
nitrogen blowing.
• After charging, check for leakage before
commissioning.
• Be sure to check for leakage before leaving the work
area.
The outdoor unit is loaded with sufficient refrigerant
for the standard piping. Thus, refrigerant must be added
if the piping is lengthened. This operation can only
be performed by a qualified refrigeration specialist.
To determine the quantity of refrigerant charge, see
Calculating the quantity of refrigerant to add on page
21.
1 Check if the stop valve is closed completely.
2 Charge the refrigerant through the service port of the
liquid stop valve.
3 If you have any difficulty charging the refrigerant as
described in the steps above, take the following steps:
a Open the liquid stop valve and gas stop valve.
b Operate the air conditioner by pressing the K2
key on the outdoor unit PCB.
21English
Installation Procedure
c After about 30 minutes, charge the refrigerant
through the service port of the gas stop valve.
Gas side stop valve
(service port))
Liquid side stop valve
(service port)
Vacuum
Pump
Ref
Balance
Indoor Unit
Charging the refrigerant under conditions of
liquid by using a liquid pipe
It is necessary for recharging under conditions of liquid.
When recharging refrigerant from the refrigerant
cylinder to the equipment, follow the instructions below.
• Before recharging, check whether the cylinder has
a siphon or not. There are two ways to recharge the
refrigerant.
Cylinder with siphon Cylinder without siphon
siphon
Charge the refrigerant standing the
cylinder upright.
Charge the refrigerant turning the
cylinder upside down.
NOTE
• During the measuring operation of refrigerant
quantity added use an electronic balance.If cylinder
doesn’t have syphon, upset it.
Calculating the quantity of refrigerant to add
The quantity of additional refrigerant is variable
according to the installation situation. Thus, make sure
the outdoor unit situation before adding refrigerant.
This operation can only be performed by a qualified
refrigeration specialist.
When installing the outdoor unit only
Model
Interconnection pipe length (m)
0 to 20 20 to 30 30 to 40 40 to 50
AC026TXAPKG
AC035TXAPKG
0
AC052TXAPKG
AC060TXAPKG
AC071TXAPKG
0 +25 g/m over 20 m
CAUTION
• Make sure that the total refrigerant charge does not
exceed (A), the maximum refrigerant charge, which
is calculated in the following formula: Maximum
refrigerant charge (A) = factory refrigerant charge
(B) + maximum additional refrigerant charge due to
piping extension (C).
(Unit: g)
Model A B C
AC026TXAPKG 900 900 0
AC035TXAPKG 900 900 0
AC052TXAPKG 2450 1700 750
AC060TXAPKG 2450 1700 750
AC071TXAPKG 2450 1700 750
22
Installation Procedure
English
Installation Procedure
Step 9 Performing the gas leak test
LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before
recreating the vacuum and recirculating the R-32, it is
the responsibility of the installer to pressurize the whole
system with nitrogen (using a cylinder with pressure
reducer) at a pressure above 0.2MPa, less than 4MPa
(gauge).
LEAK TEST WITH R-32 (after opening valves)
Before opening valves, discharge all the nitrogen into
the system and create vacuum. After opening valves
check leaks using a leak detector for refrigerant R-32.
Once you have completed all the connections, check for
possible leaks using leak detector specifically designed
for HFC refrigerants.
A(Gas)
B(liquid)
• The designs and shape are subject to change
according to the model.
Step 10 Connecting the drain hose to
the outdoor unit
When using the air conditioner in the heating mode, ice
may accumulate . During de-icing (defrost operation),
the condensed water must be drained off safely.
Consequently, you must install a drain hose on the
outdoor unit, following the instructions below.
1 Make space more than "A" mm between the bottom of
the outdoor unit and the ground for installation of the
drain hose, as shown in figure.
2 Insert the drain plug into the hole on the underside of
the outdoor unit.
3 Connect the drain hose to the drain plug.
4 Ensure that the drained water runs off correctly and
safely.
A
B
Model A B
AC026TXAPKG
AC035TXAPKG
AC052TXAPKG
AC060TXAPKG
AC071TXAPKG
80 mm 30 mm
5 Be sure to plug the rest of drain holes not connected
with drain plugs using drain caps.
**026/035**
Drain plug (1EA)
**052/060/071**
Drain cap (3EA)
Drain plug (1EA)
• When installing the product, make sure that the
rack is not placed under the drain hole.
• If the product is installed in a region of heavy
snow, allow enough separation distance between
the product and the ground.
23English
Installation Procedure
Step 11 Insulating the refrigerant
pipes
Once you have checked that there are no leaks in the
system, you can insulate the piping and hose.
1 To avoid condensation problems, place an insulator
around each refrigerant pipe.
No gap
NBR
NOTE
• When insulate the pipe, be sure to overlap the
insulation.
• The insulation has to be produced in full compliance
of European regulation reg. EEC / EU 2037/ 2000
that requires the use of sheaths insulation form
without using CFC and HCFC gases for health and the
environment.
CAUTION
• When insulating the pipe, use non-slit insulator.
2 Select the insulation of the refrigerant pipe.
• Insulate the gas side and liquid side pipe referring
to the thickness according to the pipe size.
• Less than Indoor temperature of 30°C and
humidity of 85% is the standard condition. If
installing in a high humidity condition, use one
grade thicker insulator by referring to the table
below. If installing in an unfavourable conditions,
use thicker one.
• Insulator’s heat-resistance temperature should be
more than 120°C.
Pipe Pipe size
Insulation Type
(Heating/Cooling)
Remarks
Standard
[Less than
30°C, 85%]
High
humidity
[over 30°C,
85%]
EPDM, NBR
Liquid pipe
Ø6.35~Ø9.52 9 t 9 t
Internal
temperature
is higher than
120°C
Ø12.7~Ø19.05 13 t 13 t
Gas pipe
Ø6.35 13 t 19 t
Ø9.52~Ø19.05 19 t 25 t
• When installing insulation in places and conditions
below, use the same insulation that is used for
high humidity conditions.
<Geological condition>
– High humidity places such as shoreline, hot
spring, near lake or river, and ridge (when the
part of the building is covered by earth and
sand.)
<Operation purpose condition>
– Restaurant ceiling, sauna, swimming pool etc.
– <Building construction condition>
– The ceiling frequently exposed to moisture
and cooling is not covered.
– e.g. The pipe installed at a corridor of a
dormitory and studio or near an exit that
opens and closes frequently.
– The place where the pipe is installed is highly
humid due to the lack of ventilation system.
Step 12 Checking the earthing
If the power distribution circuit does not have a earthing
or the earthing does not comply with specifications, an
earthing electrode must be installed. The corresponding
accessories are not supplied with the air conditioner.
1 Select an earthing electrode that complies with the
specifications given in the illustration.
2 Connect the flexible hose to the flexible hose port.
• In damp hard soil rather than loose sandy or
gravel soil that has a higher earthing resistance.
• Away from underground structures or facilities,
such as gas pipes, water pipes, telephone lines and
underground cables.
• At least two metres away from a lightening
conductor earthing electrode and its cable.
NOTE
• The earthing wire for the telephone line cannot be
used to ground the air conditioner.
24
Installation Procedure
English
Installation Procedure
50 cm
30 cm
Carbon plastic
To grounding screw
Steel core
Terminal M4
PVC-insulated
green/yellow
wire
3 Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4 Install a green/yellow coloured earthing wire:
• If the earthing wire is too short, connect an
extension lead in a mechanical way and wrap it
with insulating tape (do not bury the connection).
• Secure the earthing wire in position with staples.
NOTE
• If the earthing electrode is installed in an area with
heavy traffic, its wire must be connected securely.
5 Carefully check the installation by measuring the
earthing resistance with a earth resistance tester. If
the resistance is above the required level, drive the
electrode deeper into the ground or increase the
number of earthing electrodes.
6 Connect the earthing wire to the electrical component
box inside of the outdoor unit.
Step 13 Performing nal check and
trial operation
<Main PCB>
1 Check the power supply between the outdoor unit
and the auxiliary circuit breaker.
• 1 phase power supply: L, N
2 Check the indoor unit.
a Check that you have connected the power and
communication cables correctly. (If the power
cable and communication cables one mixed up or
connected incorrectly, the PCB will be damaged.)
b Check that the thermistor sensor, drain pump/
hose, and display are connected correctly.
3 Press K1 or K2 on the outdoor unit PCB to run the
test mode and stop.
Key Push type Mode
Display
SEG
1
SEG
2
SEG
3
SEG
4
K1 Short
1st Heating test mode
2nd Defrost test mode
3rd Stop
K2 Short
1st Cooling test
2nd Inverter check
3rd Pump down
4th Stop
K3 Short 1st
Reset Release Eco
mode
Defrost test mode
Condition 1: The outdoor temperature is under 10°C
Condition 2: All the temperature conditions should meet
the defrost conditions
4 After 12 minutes of stationary condition check each
indoor unit air treatment:
• Cooling mode (indoor unit check) → Inlet air temp.
- Outlet air temp.: From 10°C to 12°C
• Heating mode (indoor unit check) → Outlet air
temp. - Inlet air temp.: From 11°C to 14°C
• In heating mode, the indoor fan motor can remain
off to avoid cold air blown into air-conditioned
space.
5 How to reset the power supply of the outdoor unit
and deactivate the eco mode (standby mode):
• Press K3 button over 1 sec to reset the power
supply of the outdoor unit and deactivate the eco
mode (standby mode).
Eco mode : Standby for minimizing power onsumption
6 View mode: When the K4 switch is pressed, you can
see information about our system state as below.
25English
Installation Procedure
K4
short
push
Display contents SEG1 SEG2 SEG3 SEG4 Unit
1 Order frequency 1 Hundreds digit Tens digit Units digit Hz
2 Current frequency 2 Hundreds digit Tens digit Units digit Hz
3
The number of preset
indoor units
3 Hundreds digit Tens digit Units digit EA
4
Ambient temperature
sensor
4 + / - Tens digit Units digit °C
5
Compressor discharge
sensor
5 Hundreds digit Tens digit Units digit °C
6 Eva sensor 6 + / - Tens digit Units digit °C
7 Condensor sensor 7 + / - Tens digit Units digit °C
8 Current 8 Tens digit Units digit
The first place of
decimals
A
9 Fan RPM 9 Thousands digit Hundreds digit Tens digit rpm
10
Target discharge
temperature
A Hundreds digit Tens digit Units digit °C
11 EEV B Hundreds digit Tens digit Units digit step
12
The capacity sum of indoor
units
C Tens digit Unit digit
The first place of
decimals
kW
13 Protective control D
0: Cooling
1: Heating
Protective control
0: No Protective
control
1: Freezing
2: Non-stop
defrosting
3: Over-load
4: Discharge
5: Total electric
current
Frequency status
0: Normal
1: Hold
2: Down
3: Up_limit
4: Down_limit
-
14 IPM temperature E Hundreds digit Tens digit Units digit -
15
The number of connected
indoor units
F 0 Tens digit Units digit EA
Display contents SEG1 SEG2 SEG3 SEG4
K4
long
push
- Main micom version Year (Dec) Month (Hex) Date (Tens digit) Date (Units digit)
After short push 1 Inverter micom version Year (Dec) Month (Hex) Date (Tens digit) Date (Units digit)
After short push 2 E2P version Year (Dec) Month (Hex) Date (Tens digit) Date (Units digit)
After short push 3
Page1 -AUTO
Page2 - (SEG1,2 - Indoor unit: "A","0")(SEG3,4 - Address: ex) 00)
After short push 4
Page1 -MANU
Page2 - (SEG1,2 - Indoor unit: "A","0")(SEG3,4 - Address: ex) 00)
• Long push K4 (Main micom ver.) → short push 1 more (Inv. micom ver.) → short push 1 more (E2P. ver.)
26
Installation Procedure
English
Installation Procedure
7 Setting outdoor unit option switch and address
manually
a Setting the option
• Press and hold K2 to enter the option setting.
(Only available when the operation is stopped)
– If you enter the option setting, display will
show the following.
– Seg 1 and Seg 2 will display the number for
selected option.
– Seg 3 and Seg 4 will display the number for
set value of the selected option.
• If you have selected desired option, you can
shortly press the K2 switch to adjust the value of
the Seg 3, Seg 4 and change the function for the
selected option.
Example)
• If you have selected desired option, you can
shortly press the K2 switch to adjust the value of
the Seg 3, Seg 4 and change the function for the
selected option.
Example)
• After selecting the function for options, press and
hold the K2 switch for 2 seconds. Edited value of
the option will be saved when entire segments
blinks and tracking mode begins.
Option item
Input
unit
SEG1 SEG2 SEG3 SEG4 Function
Channel
address
Main 0 0
A U
Automatic
setting (Factory
default)
00~15 Manual setting
Snow
accumulation
prevention
control
Main 0 1
0 0
Disabled (Factory
default)
0 1 Enabled
Step for
Silence mode
Main 0 2
0 0
Disabled (Factory
default)
0 1 Step1
0 2 Step2
0 3 Step3
Type of
Silence mode
Main 0 3
0 0
Automatic
Silence mode
(Factory default)
0 1
Manual Silence
mode
CAUTION
• Edited option will not be saved if you do not end the
option setting as explained in above instruction.
While you are setting the option, you may press and
hold the K1 button to reset the value to previous
setting.
If you want to restore the setting to factory default,
press and hold the K4 button while you are in the
option setting mode.
– If you press and hold the K4 button, setting will be
restored to factory default but it doesn't mean that
restored setting is saved.Press and hold the K2
button. When the segments shows that tracking
mode is in progress, setting will be saved.
27English
Extra Procedures
Extra Procedures
Extra procedures
Pumping down refrigerant
WARNING
• After installing the product, be sure to perform leak
tests on the piping connections. After pumping down
refrigerant to inspect or relocate the outdoor unit,
be sure to stop the compressor and then remove the
connected pipes.
– Do not operate the compressor while a valve is
open due to refrigerant leakage from a pipe or an
unconnected or incorrectly connected pipe. Failure
to do so may cause air to flow into the compressor
and too a high pressure to develop inside the
refrigerant circuit, leading to an explosion or
product malfunction.
Pump-down is an operation intended to collect all the
system refrigerant in the outdoor unit.
This operation must be carried out before disconnecting
the refrigerant pipe in order to avoid refrigerant loss to
the atmosphere.
1 Turn the system on in cooling with fan operating at
high velocity and then let the compressor run for
more than 5 minutes. (Compressor will immediately
start, provided 3 minutes have elapsed since the last
stop.)
2 Release the valve caps on High and Low pressure
side.
3 Use L-wrench to close the valve on the high pressure
side.
4 After approximately 2 minute, close the valve on the
low pressure side.
5 Stop operation of the air conditioner by pressing the
(Power) button on the indoor unit or remote control.
6 Disconnect the pipes.
A(Gas)
B(liquid)
Relocating the indoor and outdoor
units
1 Pump down refrigerant. See Pumping down
refrigerant on page 27.
2 Remove the power cord.
3 Disconnect the assembly cable from the indoor and
outdoor units.
4 Remove the flare nuts connecting the indoor units
and the pipes. At this time, cover the pipes of the
indoor unit and the other pipes using a cap or vinyl
plug to avoid foreign material entering.
5 Disconnect the pipes connected to the outdoor units.
At this time, cover the valve of the outdoor units and
the other pipes using a cap or vinyl plug to avoid
foreign material entering.
Note: Make sure you do not bend the connection
pipes in the middle and store together with the
cables.
6 Move the indoor and outdoor units to a new location.
7 Remove the mounting plate for the indoor unit and
move it to a new location.
Using the stop valve
Opening the stop valve
1 Open the cap and turn the stop valve anticlockwise
by using a hexagonal wrench.
2 Turn it until the axis is stopped.
Tightening torque
for body cap
(Refer to the table)
R-22: Thread of the
screw - 7/16-20UNF
R-410A / R-32: Thread of
the screw - 1/2-20UNF
Tightening torque
for charging port cap
(Refer to the table)
Charging core
Spindle
28
Extra Procedures
English
Extra Procedures
3 Tighten the cap securely.
Outer Diameter
(mm)
Tightening torque
Body cap (N•m)
Charging port cap
(N•m)
Ø6.35
20 to 25
10 to 12
Ø9.52
20 to 25
Ø12.70
25 to 30
Ø15.88
30 to 35
Over Ø19.05
35 to 40
(1 N•m=10 kgf•cm)
NOTE
• Do not apply excessive force to the stop valve and
always use special instruments. Otherwise, the
stopping box can be damaged and the back sheet can
leaks.
• If the watertight sheet leaks, turn the axis back by
half, tighten the stopping box, then check the leakage
again. If there is no leakage any more, tighten the
axis entirely.
Closing the stop valve
1 Remove the cap.
2 Turn the stop valve clockwise by using a hexagonal
wrench.
3 Tighten the axis until the valve reached the sealing
point.
4 Tighten the cap securely.
CAUTION
• When you use the service port, always use a charging
hose, too.
• Check the leakage of refrigerant gas after tightening
the cap.
• Must use a spanner and wrench when you open/
tighten the stop valve.
29English
Maintence Procedures
Maintence Procedures
Performing the gas leak tests for repair
In case of repair of the refrigerant circuit, the following
procedure must be kept to consider flammability.
1 Remove the refrigerant.
2 Purge the refrigerant circuit with inert gas.
3 Perform evacuation.
4 Purge the circuit again with inert gas.
5 Open the circuit.
6 Perform repair work.
7 Charge the system with refrigerant.
8 Flush the system with nitrogen blowing for safety.
9 Repeat the previous steps several times until no
refrigerant is within the system.
CAUTION
• Compressed air or oxygen shall not be used.
• Flush the system with nitrogen blowing, fill the
refrigerant until the working pressure is reached,
ventilate to atmosphere, and then pull down to a
vacuum state.
• For the final nitrogen blowing charge, the system
shall be ventilated down to atmospheric pressure.
• The procedure is absolutely vital in case of brazing on
the pipings.
• Make sure that the outlet of the vacuum pump is not
closed to any ignition sources and there is ventilation
available.
• Do not apply any permanent inductive or capacitance
loads to the circuit without ensuring that this will not
exceed the permissible voltage and current permitted
for the air condiitoner.
Decommissioning
The following requirements must be fulfilled before and
while taking the decommissioning procedure:
• Before decommissioning, the worker shall be familiar
with the product details.
• The entire refrigerant shall be recovered safely.
• Before starting the process, oil and refrigerant
samples shall be taken just in case analysis is
required for reuse.
• Before starting the process, power supply must be
available.
1 Be familiar with the equipment details.
2 Isolate the system electrically.
3 Before starting the process, make sure that:
• Any mechanical equipment is available for handling
refrigerant cylinders.
• All PPE (personal protective equipment) is available
for servicing.
• The recovery process shall be supervised by a
competent person.
• The recovery equipment and cylinders comply with
the standards.
4 Lower the refrigeration system, if possible.
5 If vacuuming is not possible, make a manifold so that
refrigerant can be easily removed from the parts of
the system.
6 Make sure that the cylinders are placed on the scales
before recovery.
7 Run the recovery system in accordance with the
manufacturer’s instructions.
8 Do not overcharge the cylinders. (No more than 80
%)
9 Be sure to keep the cylinder within the maximum
working pressure, even temporarily.
10 After charging, make sure that the cylinders and the
equipment are promptly removed from the site and
all isolation valves are closed.
11 Recovered refrigerant shall not be charged into other
refrigeration system unless it is cleaned and checked.
30
Appendix
English
Appendix
Troubleshooting
The table below list the self-diagnostic routines. For some of error codes, you must contact an authorized service
centre.
If an error occurs during the operation, it is displayed on the outdoor unit PCB LED, both MAIN PCB and INVERTER
PCB.
No.
Error Code Meaning
Remarks
1 E108 Error due to duplicated communication address Check on repeated indoor unit main address
2 E121
Error on room temperature sensor of indoor unit (Short or
Open)
Indoor unit Room Thermistor Open/Short
3 E122 Error on EVA IN sensor of indoor unit (Short or Open) Indoor unit EVA_IN Thermistor Open/Short
4 E123 Error on EVA OUT sensor of indoor unit (Short or Open) Indoor unit EVA_OUT Thermistor Open/Short
5 E153 Error on float switch (2nd detection)
Indoor unit Float Switch Open/Short Drain Pump
operation Check
6 E154 Indoor fan error Check on indoor unit indoor Fan operation
7 E198 Error on thermal fuse of indoor unit (Open)
Thermal Fuse Open Check of indoor unit
Terminal Block
8 E201
Communication error between the indoor unit and outdoor
unit (Pre-tracking failure or when the actual number of indoor
units are different from the indoor unit quantity setting on
the outdoor unit)
Error due to communication tracking failure after initial power
is supplied (The error occurs regardless of the number of
units.)
Check indoor quantity setting in outdoor
9 E202
Communication error between indoor unit and outdoor unit
(When there is no response from indoor units after tracking is
completed)
Check electrical connection and setting between
indoor unit and outdoor unit
10 E203
Communication error between the outdoor unit and main
micom (For PF #4 to #6 controllers, error will be determined
from the time when the compressor is turned on.)
Check electrical connection and setting between
indoor unit MAIN PBA - INVERTER PBA
11 E221 Error on outdoor temperature sensor (Short or Open) Check Outdoor sensor Open / Short
12 E231 Error on outdoor COND OUT sensor (Short or Open) Check Cond-Out sensor Open / Short
13 E251
Error on discharge temperature sensor of compressor 1 (Short
or Open)
Check Discharge sensor Open / Short
14 E320 Error on OLP sensor (Short or Open) Check OLP sensor Open / Short
15 E403 Compressor down due to freeze protection control Check Outdoor Cond.
16 E404 System stop due to overload protection control Check Comp. when it starts
17 E407 Comp down due to high pressure -
18
E416 System stop due to discharge temperature -
Appendix
31English
Appendix
No.
Error Code Meaning
Remarks
19
E422
Blockage detected on high pressure pipe
1. Check if the service valve is open
2. Check for refrigerant leakage (pipe
connections, heat exchanger) and charge
refrigerant if necessary
3. Check if there's any blockage on the
refrigerant cycle (indoor unit/outdoor unit)
4. Check if additional refrigerant has been
added after pipe extension
20
E440
Heating operation restricted at outdoor temperature over
Theat_high value
HEATING
21
E441
Cooling operation restricted at outdoor temperature below
Tcool_low value
COOLING
22
E458
Fan speed error FAN1 ERROR
23
E461
Error due to operation failure of inverter compressor -
24
E462
System stop due to full current control -
25
E463
Over current trip / PFC over current error Check OLP sensor
26
E464
IPM Over Current(O.C) IPM
27
E465
Comp. Over load error -
28
E466
DC-Link voltage under/over error Check AC Power and DC Link Voltage
29
E467
Error due to abnormal rotation of the compressor or
unconnected wire of compressor
Check Comp wire
30
E468
Error on current sensor (Short or Open) Check Outdoor Inverter PBA.
31
E469
Error on DC-Link voltage sensor (Short or Open) -
32
E470
Outdoor unit EEPROM Read/Write error (Option) Check Outdoor EEPROM Data
33
E471
Outdoor unit EEPROM Read/Write error (H/W) Check Outdoor EEPROM PBA
34
E474
Error on IPM Heat Sink sensor of inverter 1 (Short or Open) Check Outdoor Inverter PBA.
35
E483
Over Voltage Protecting Error Check Outdoor inverter PBA
36
E484
PFC Overload (Over current) Error Check Outdoor Inverter PBA.
37
E485
Error on input current sensor of inverter 1 (Short or Open) Check Outdoor EEPROM PBA
38
E488
AC Input Voltage limit Sensor Error Check Outdoor inverter PBA
39
E500
IPM over heat error on inverter 1 Check Outdoor Inverter PBA.
40 E508
Smart install is not installed -
41
E554
Gas leak detected Check the refrigerant
42
E556
Error due to mismatching capacity of indoor and outdoor unit
Check the indoor and outdoor unit capacity
43
E557
When DPM mode, Product option are not same between
indoor units
-
44
E563
Error due to mismatching indoor and outdoor unit
Check the outdoor EEPROM data and indoor
option code
45
E590
Inverter EEPROM Checksum error -
This appliance is filled with R-32.
