INVERTER ONE-TWO/ONE-THREE/ONE-FOUR/ONE-FIVE

SPLIT-TYPE AIR CONDITIONER

Owner’s Manual &

Installation Manual
Models
KFS-20DAG1M-O
KFS-30DAG1M-O
KFS-40DAG1M-O
SERIES III - Outdoor
KFS-50DAG1M-O Unit
MULTI-SPLIT TYPE INVERTER AIR CONDITIONER

OWNER’S MANUAL
& INSTALLATION MANUAL

Models
KFS-20DAG1M-O
KFS-30DAG1M-O
KFS-40DAG1M-O
KFS-50DAG1M-O
IMPORTANT NOTE:
Read this manual carefully before installing
or operating your new air conditioning
unit. Make sure to save this manual for
future reference.

Please check the applicable models, technical

data, F-GAS(if any) and manufacturer information
from the “Owner's Manual - Product Fiche ”
in the packaging of the outdoor unit.
(European Union products only)
 Table of Contents

Safety Precautions ........................................................................04

Owner’s Manual

Unit Parts And Major Functions ...................................................08

1. Unit Parts .............................................................................................................................................................................08

2. Operating temperature ..................................................................................................................................................10
3. Features ...............................................................................................................................................................................11

Manual Operations And Maintenance ..........................................13

Troubleshooting ............................................................................14
 Installation Manual

Accessories .......................................................................................17

Installation Summary .........................................................................18

Installation Diagram ...........................................................................19

Specifications .....................................................................................20

Outdoor Unit Installation ...................................................................21

1. Select installation location ....................................................................................................................................................21
2. Install drain joint .......................................................................................................................................................................22
3. Anchor outdoor unit ................................................................................................................................................................22

Refrigerant Piping Connection .........................................................24

1. Cut pipe ........................................................................................................................................................................................24
2. Remove burrs ...........................................................................................................................................................................24
3. Flare pipe ends ..........................................................................................................................................................................24
4. Connect pipes ............................................................................................................................................................................25

Wiring .................................................................................................27
1. Outdoor Uint Wiring .................................................................................................................................................................29
2. Wiring Figure ..............................................................................................................................................................................30

Air Evacuation ...................................................................................37

1. Note On Adding Refrigerant .................................................................................................................................................38
2. Safety And Leakage Check ....................................................................................................................................................40

Test Run ..............................................................................................41

Function of Automatic Wiring/Piping Correction .............................42

 
Introduction
Precautions
Precautions
Safety

Safety Precautions
Read Safety Precautions Before Operation and Installation
Incorrect installation due to ignoring instructions can cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.

WARNING CAUTION
This symbol indicates the possibility This symbol indicates the possibility of
of personnel injury or loss of life. property damage or serious consequences.

WARNING
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction 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
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.

WARNINGS FOR PRODUCT USE

• If an abnormal situation arises (like a burning smell), immediately turn off the unit and disconnect
the power. Call your dealer for instructions to avoid electric shock, fire or injury.
• Do not insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since
the fan may be rotating at high speeds.
• Do not use flammable sprays such as hair spray, lacquer or paint near the unit. This may cause
fire or combustion.
• Do not operate the air conditioner in places near or around combustible gases. Emitted gas may
collect around the unit and cause explosion.
• Do not operate your air conditioner in a wet room such as a bathroom or laundry room. Too
much exposure to water can cause electrical components to short circuit.
• Do not expose your body directly to cool air for a prolonged period of time.
• Do not allow children to play with the air conditioner. Children must be supervised around the
unit at all times.
• If the air conditioner is used together with burners or other heating devices, thoroughly ventilate
the room to avoid oxygen deficiency.
• In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.

CLEANING AND MAINTENANCE WARNINGS

• Turn off the device and disconnect the power before cleaning. Failure to do so can cause
1. Installation must be performed by an authorized dealer or specialist. Defective installation can
electrical shock.
• cause waterclean
Do not leakage, electrical
the air shock,with
conditioner or fire.
excessive amounts of water.
 
 Precautions
Safety
CLEANING AND MAINTENANCE WARNINGS
• Do not clean the air conditioner with combustible cleaning agents. Combustible cleaning agents
can cause fire or deformation.

CAUTION
• Turn off the air conditioner and disconnect the power if you are not going to use it for a long time.
• Turn off and unplug the unit during storms.
• Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electric shock.
• Do not use device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
• Do not allow the air conditioner to operate for long periods of time with doors or windows open,
or if the humidity is very high.

ELECTRICAL WARNINGS
• Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
• Keep power plug clean. Remove any dust or grime that accumulates on or around the plug. Dirty
plugs can cause fire or electric shock.
• Do not pull power cord to unplug unit. Hold the plug firmly and pull it from the outlet. Pulling
directly on the cord can damage it, which can lead to fire or electric shock.
• Do not modify the length of the power supply cord or use an extension cord to power the unit.
• Do not share the electrical outlet with other appliances. Improper or insufficient power supply
can cause fire or electrical shock.
• The product must be properly grounded at the time of installation, or electrical shock may occur.
• For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces
from damaging the terminal. Improper electrical connections can overheat and cause fire, and may
also cause shock. All electrical connections must be made according to the Electrical Connection
Diagram located on the panels of the indoor and outdoor units.
• All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connection
points on the terminal to heat up, catch fire, or cause electrical shock.
• If connecting power to fixed wiring, an all-pole disconnection device which has at least 3mm
clearances in all poles, and have a leakage current that may exceed 10mA, the residual current
device(RCD) having a rated residual operating current not exceeding 30mA, and disconnection
must be incorporated in the fixed wiring in accordance with the wiring rules.
TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection.
The specifications of the fuse are printed on the circuit board ,such as :
T20A/250VAC(for <24000Btu/h unit), T30A/250VAC(for >24000Btu/h unit)
NOTE: For the units with R32 or R290 refrigerant , only the blast-proof ceramic fuse can be used.

WARNINGS FOR PRODUCT INSTALLATION

 
Precautions
Safety

WARNINGS FOR PRODUCT INSTALLATION

2. Installation must be performed according to the installation instructions. Improper installation
can cause water leakage, electrical shock, or fire.
In North America,installation must be performed in accordance with the requirement of NEC
and CEC by authorized personnel only.)
3. Contact an authorized service technician for repair or maintenance of this unit. This appliance
shall be installed in accordance with national wiring regulations.
4. Only use the included accessories, parts, and specified parts for installation. Using non-standard
parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
5. Install the unit in a firm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may drop and cause
serious injury and damage.
6. Install drainage piping according to the instructions in this manual. Improper drainage may
cause water damage to your home and property.
7. For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of
any combustible materials.
8. Do not install the unit in a location that may be exposed to combustible gas leaks. If
combustible gas accumulates around the unit, it may cause fire.
9. Do not turn on the power until all work has been completed.
10. When moving or relocating the air conditioner, consult experienced service technicians for
disconnection and reinstallation of the unit.
11. How to install the appliance to its support, please read the information for details in "indoor unit
installation" and "outdoor unit installation" sections .

Note about Fluorinated Gasses(Not applicable to the unit using R290 Refrigerant)
1. This air-conditioning unit contains fluorinated greenhouse gasses. For specific information on the
type of gas and the amount, please refer to the relevant label on the unit itself or the
“Owner's Manual - Product Fiche ” in the packaging of the outdoor unit. (European
Union products only).
2. Installation, service, maintenance and repair of this unit must be performed by a certified
technician.
3. Product uninstallation and recycling must be performed by a certified technician.
4. For equipment that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO2
equivalent or more, but of less than 50 tonnes of CO2 equivalent, If the system has a leak-
detection system installed, it must be checked for leaks at least every 24 months.
5. When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.

WARNING for Using R32 Refrigerant

When flammable refrigerant are employed, appliance shall be stored in a well -ventilated area
where the room size corresponds to the room area as specifiec for operation.
For R32 frigerant models:
Appliance shall be installed, operated and stored in a room with a floor area larger than X m² .
Appliance shall not be installed in an unvertilated space, if that space is smaller than X m² .
(Please see the following form).
Disposing of this appliance in the forest or other natural surroundings endangers your health and is bad
for the environment. Hazardous substances may leak into the ground water and enter the food chain.

 
 Precautions
Safety
Amount of refrigerant Installation height Minimum room Amount of refrigerant Installation height Minimum room
to be charged (kg) (m) area (m²) to be charged (kg) (m) area (m²)
1.0 0.6 /1.8 /2.2 9 /1 /1 1.95 0.6 /1.8 /2.2 33 /4 /2.5
1.05 0.6 /1.8 /2.2 9.5 /1.5 /1 2.0 0.6 /1.8 /2.2 34.5 /4 /3
1.1 0.6 /1.8 /2.2 10.5 /1.5 /1 2.05 0.6 /1.8 /2.2 36 /4 /3
1.15 0.6 /1.8 /2.2 11.5 /1.5 /1 2.1 0.6 /1.8 /2.2 38 /4.5 /3
1.2 0.6 /1.8 /2.2 12.5 /1.5 /1 2.15 0.6 /1.8 /2.2 40 /4.5 /3
1.25 0.6 /1.8 /2.2 13.5 /1.5 /1 2.2 0.6 /1.8 /2.2 41.5 /5 /3.5
1.3 0.6 /1.8 /2.2 14.5 /2 /1.5 2.25 0.6 /1.8 /2.2 43.5 /5 /3.5
1.35 0.6 /1.8 /2.2 16 /2 /1.5 2.3 0.6 /1.8 /2.2 45.5/5 /3.5
1.4 0.6 /1.8 /2.2 17/2 /1.5 2.35 0.6 /1.8 /2.2 47.5/5.5 /4
1.45 0.6 /1.8 /2.2 18 /2 /1.5 2.4 0.6 /1.8 /2.2 49.5 /5.5 /4
1.5 0.6 /1.8 /2.2 19.5 /2.5 /1.5 2.45 0.6 /1.8 /2.2 51.5 /6 /4
1.55 0.6 /1.8 /2.2 21 /2.5 /2 2.5 0.6 /1.8 /2.2 54 /6 /4
1.6 0.6 /1.8 /2.2 22 /2.5 /2 2.55 0.6 /1.8 /2.2 56 /6.5 /4.5
1.65 0.6 /1.8 /2.2 23.5 /3 /2 2.6 0.6 /1.8 /2.2 58 /6.5 /4.5
1.7 0.6 /1.8 /2.2 25 /3 /2 2.65 0.6 /1.8 /2.2 60.5/7 /4.5
1.75 0.6 /1.8 /2.2 26.5 /3 /2 2.7 0.6 /1.8 /2.2 63 /7 /5
1.8 0.6 /1.8 /2.2 28 /3.5 /2.5 2.75 0.6 /1.8 /2.2 65 /7.5 /5
1.85 0.6 /1.8 /2.2 29.5 /3.5 /2.5 2.8 0.6 /1.8 /2.2 67.5 /7.5 /5
1.9 0.6 /1.8 /2.2 31/3.5 /2.5 2.85 0.6 /1.8 /2.2 70 /8 /5.5

Reusable mechanical connectors and flared joints are not allowed indoors.
(EN Standard Requirements).
Mechanical connectors used indoors shall have a rate of not more than 3g/year at 25% of the
maximum allowable pressure. When mechanical connectors are reused indoors, sealing parts shall
be renewed. When flared joints are reused indoors, the flare part shall be re-fabricated.
(UL Standard Requirements)
When mechanical connectors are reused indoors, sealing parts shall be renewed. When flared
joints are reused indoors, the flare part shall be re-fabricated. (IEC Standard Requirements)
Mechanical connectors used indoors shall comply with ISO 14903.

European Disposal Guidelines

This marking shown on the product or its literature, indicates that waste electrical and
eletrical equipment should not be mixed with general household waste.

Correct Disposal of This Product

(Waste Electrical & Electronic Equipment)

This appliance contains refrigerant and other potentially hazardous materials. When disposing of
this appliance, the law requires special collection and treatment. Do not dispose of this product as
household waste or unsorted municipal waste.
When disposing of this appliance, you have the following options:
• Dispose of the appliance at designated municipal electronic waste collection facility.
• When buying a new appliance, the retailer will take back the old appliance free of charge.
• The manufacturer will take back the old appliance free of charge.
• Sell the appliance to certified scrap metal dealers.
Special notice

 
And Major
Unit Parts
Functions

Unit Parts And Major Functions

Unit Parts
(A) Wall-mounted type

Indoor unit
1. Panel frame
2. Rear air intake grille
3. Front panel
4. Air purifying filter & Air filter(behind)
5. Horizontal louver
6. LCD display window
7. Vertical louver
8. Manual control button(behind)
9. Remote controller holder
Outdoor unit
10. Drain hose, refrigerant connecting pipe
11. Connective cable
12. Stop valve
13. Fan hood

 
 NOTE: For multi-split type air conditioners, one outdoor unit can be matched to different types of
And Major
Unit Parts
Functions

indoor units. All of the pictures in this manual are for demonstration purposes only. Your air
conditioner may be slightly different, if similar in shape. The following pages introduce several kinds
of indoor units that can be matched with the outdoor units.

Operating Conditions

Operating temperature
When your air conditioner is used outside of the following temperature ranges, certain safety
protection features may activate and cause the unit to disable.

Inverter Split Type

COOL mode HEAT mode DRY mode FOR OUTDOOR UNITS
WITH AUXILIARY
17°C - 30°C 0°C - 30°C 17°C - 30°C ELECTRIC HEATER
Room Temperature
(62°F - 86°F) (32°F - 86°F) (62°F - 86°F)
When outside
temperature is below 0°C
0°C - 43°C
(32°F ), we strongly
(32°F - 105°F)
recommend keeping the
-15°C - 50°C -15°C - 24°C 0°C - 43°C
unit plugged in at all
(5°F - 122°F) (5°F - 75°F) (32°F - 109°F) time to ensure smooth
Outdoor
(For models with
ongoing performance.
Temperature
low temp. cooling
systems.)

Note: Well- Ventilated condition

Fixed-speed Type

COOL mode HEAT mode DRY mode

Room 0°C-30°C
Temperature 16°C-32°C (60°F-90°F) 10°C-32°C (50°F-90°F)
(32°F-86°F)
18°C-43°C (64°F-109°F) 11°C-43°C (52°F-109°F)
Outdoor -7°C-43°C (19°F-109°F) -7°C-24°C 18°C-43°C (64°F-109°F)
Temperature (For models with low-temp cooling systems)
(19°F-75°F)
18°C-52°C (64°F-126°F) 18°C-52°C (64°F-126°F)
(For special tropical models) (For special tropical models)

NOTE: Room relative humidity less than 80%. If the air conditioner operates in excess of this
figure, the surface of the air conditioner may attract condensation. Please sets the vertical air
flow louver to its maximum angle (vertically to the floor), and set HIGH fan mode.
To further optimize the performance of your unit, do the following:
• Keep doors and windows closed.
• Limit energy usage by using TIMER ON and TIMER OFF functions.
• Do not block air inlets or outlets.
• Regularly inspect and clean air filters.

 
Features

And Major
Unit Parts
Functions
Protection of the air conditioner White mist emerging from the indoor unit
Compressor protection • A white mist may be generated due to a large
• The compressor cannot restart for 3 minutes temperature difference between air inlet and
after it stops. air outlet on COOL mode in places with high
Anti-cold air (Cooling and heating models
relative humidity.
only)
• A white mist may be generated due to moisture
• The unit is designed not to blow cold air on
created in the defrosting process when the air
HEAT mode, when the indoor heat exchanger
conditioner restarts in HEAT mode operation
is in one of the following three situations and
after defrosting.
the set temperature has not been reached.
A) When heating has just started. Noise coming from the air conditioner
B) During defrosting. • You may hear a low hissing sound when the
C) Low temperature heating. compressor is running or has just stopped
• The indoor or outdoor fan stop running when
running. This sound is the sound of the
defrosting (Cooling and heating models only).
refrigerant flowing or coming to a stop.
Defrosting (Cooling and heating models only)
• You may also hear a low "squeaking" sound
• Frost may be generated on the outdoor unit
when the compressor is running or has just
during a heat cycle when outdoor temperature
stopped running. This is caused by tempera
is low and humidity is high resulting in lower
heat expansion and cold contraction of the
heating efficiency in the air conditioner.
• Under these conditions, the air conditioner will plastic parts in the unit when the temperature
stop heating operations and start defrosting is changing.
automatically. • A noise may be heard due to the louver
• The time to defrost may vary from 4 to 10 restoring itself to its original position when
minutes, depending the outdoor temperature power is first turned on.
and the amount of frost buildup on the Dust blowing out from the indoor unit.
outdoor unit. This is happens when the air conditioner has not
Auto-Restart (some models) been used for a long time or during its first use.
In case of power failure, the system will
Smell emitting from the indoor unit.
immediately stop. When power returns, the
Operation light on the indoor unit will flash. To This is caused by the indoor unit giving off smells
restart the unit, press the ON/OFF button on the permeated from building materials, furniture,or
remote control. If the system has an auto restart smoke.
function, the unit will restart using the same
settings.

 
 The air conditioner turns to FAN ONLY Heating mode (For cooling and heating
And Major
Unit Parts
Functions

mode from COOL or HEAT (for cooling models only)

and heating models only) mode. The air conditioner draws in heat from the
When the indoor temperature reaches the set outdoor unit and releases it via the indoor unit
temperature setting, the compressor will stop during heating. When the outdoor temperature
automatically, and the air conditioner turns to falls, heat drawn in by the air conditioner
FAN only mode. The compressor will start again decreases accordingly. At the same time, heat
when the indoor temperature rises on COOL loading of the air conditioner increases due to
mode or falls on HEAT mode to the set point. larger difference between indoor and outdoor
temperature. If a comfortable temperature
Droplets of water may form on the surface of cannot be achieved with the air conditioner
the indoor unit when cooling occurs in relatively alone, it is recommended that you use a
high humidity (defined as higher than 80%). supplementary heating device.
Adjust the horizontal louver to the maximum air Lightning or a car wireless telephone operating
outlet position and select HIGH fan speed. nearby may cause the unit to malfunction.
Disconnect the unit from its power source and
then re-connect the unit with the power source
again. Push the ON/OFF button on the remote
controller to restart operations.

Energy Saving Tips

• DO NOT set the unit to excessive temperature levels.
• While cooling, close the curtains to avoid direct sunlight.
• Doors and windows should be kept closed to keep cool or warm air in the room.
• DO NOT place objects near the air inlet and outlet of the unit. This will reduce the efficiency of the unit.
• Set a timer and use the built-in SLEEP/ECONOMY mode if applicable.
• If you don’t plan to use the unit for a long time, remove the batteries from the remote control.
• Clean the air filter every two weeks. A dirty filter can reduce cooling or heating efficiency.
• Adjust louvers properly and avoid direct airflow.

Closing curtains during heating also Doors and windows should be

helps keep the heat in kept closed

 
 Manual Operations And Maintenance

Manual Operations
And Maintenance
Operation mode selection Optimal operation

While two or more indoor units are To achieve optimal performance, please note the
simultaneously operating, make sure the modes following:
do not conflict with each other. The heat mode • Adjust the direction of the air flow so that it is
claims precedence over all other modes. If the notblowing directly on people.
unit intially started to operate in HEAT mode, the • Adjust the temperature to achieve the highest
other units can operate in HEAT mode only. For possible level of comfort. Do not adjust the unit
example: If the unit intially started operates under to excessive temperature levels.
COOL (or FAN) mode, the other units can operate • Close doors and windows in COOL mode or
under any mode except HEAT. If one of the unit HEAT mode.
selects HEAT mode, the other operating units will • Use the TIMER ON button on the remote
stop operation and diplay ”--” (for units with controller to select a time you want to start
display window only) or the auto and operation your air conditioner.
indication light will flash rapidly, the defrost • Do not place any object near the air inlet or air
indication light will turn off, and the timer outlet, as the efficiency of the air conditioner
indication light will remain on (for units without may be reduced and the air conditioner may
a display window). Alternatively, the defrost and stop running.
alarm indication light (if applicable) wil light up, • Clean the air filter periodically, otherwise
or the operation indication light will flash rapidly, cooling or heating per formance may be
and the timer indication light will turn off ( for reduced.
the floor and standing type). • Do not operate unit with horizontal louvre in
closed position.
Maintenance Suggestion:
For units that feature an electric heater,
If you plan to leave the unit idle for a long time, when the outside ambient temperature is
perform the following tasks: below 0°C (32°F), it is strongly recommended
1. Clean the indoor unit and air filter. that you to keep the machine plugged in so
2. Select FAN ONLY mode and let the indoor fan as to guarantee smooth operation.
run for a time to dry the inside of the unit.
3. Disconnect the power supply and remove the When the air conditioner is to be used
battery from the remote control. again:
4. Check components of the outdoor unit
periodically. Contact a local dealer or a • Use a dry cloth to wipe off the dust
customer service centre if the unit requires accumulated on the rear air intake grille in
servicing. order to avoid the dust being dispersed from
NOTE: Before you clean the air conditioner, be the indoor unit.
sure to switch off the unit and disconnect the • Check that the wiring is not broken off or
power supply plug. disconnected.
• Check that the air filter is installed.
• Check if the air outlet or inlet is blocked after
the air conditioner has not been used for a
long time.

 
 Troubleshooting

SAFETY PRECAUTIONS

If any of the following conditions occurs, turn off your unit immediately!
• The power cord is damaged or abnormally warm
Troubleshooting

• You smell a burning odor

• The unit emits loud or abnormal sounds
• A power fuse blows or the circuit breaker frequently trips
• Water or other objects fall into or out of the unit
DO NOT ATTEMPT TO FIX THESE YOURSELF! CONTACT AN AUTHORIZED
SERVICE PROVIDER IMMEDIATELY!

Common Issues
The following problems are not a malfunction and in most situations will not require repairs.

Problem Possible Causes

The unit has a 3-minute protection feature that prevents the unit from
Unit does not overloading. The unit cannot be restarted within three minutes of being
turned off.
turn on when
pressing ON/ Cooling and Heating Models: If the Operation light and PRE-DEF (Pre-heating/
OFF button Defrost) indicators are lit up, the outdoor temperature is too cold and the unit’s
anti-cold wind is activated in order to defrost the unit.
In Cooling-only Models: If the “Fan Only” indicator is lit up, the outdoor
temperature is too cold and the unit’s anti-freeze protection is activated in
order to defrost the unit.

The unit changes its setting to prevent frost from forming on the unit. Once
The unit changes the temperature increases, the unit will start operating again.
from COOL mode
to FAN mode The set temperature has been reached, at which point the unit turns off the
compressor. The unit will resume operating when the temperature fluctuates
again.

The indoor unit In humid regions, a large temperature difference between the room’s air and
emits white mist the conditioned air can cause white mist.

Both the indoor When the unit restarts in HEAT mode after defrosting, white mist may be
and outdoor units emitted due to moisture generated from the defrosting process.
emit white mist

 
 Problem Possible Causes
A squeaking sound is heard when the system is OFF or in COOL mode. The
The indoor unit noise is also heard when the drain pump (optional) is in operation.
makes noises
A squeaking sound may occur after running the unit in HEAT mode due to
expansion and contraction of the unit’s plastic parts.

A low hissing sound may occur during operation. This is normal and is caused
Both the indoor by refrigerant gas flowing through both the indoor and outdoor units.

Troubleshooting
unit and outdoor A low hissing sound may be heard when the system starts, has just stopped
unit make noises running or is defrosting. This noise is normal and is caused by the refrigerant
gas stopping or changing direction.

The outdoor unit The unit will make different sounds based on its current operating mode.
makes noises
Dust is emitted from The unit may accumulate dust during extended periods of non-use, which
either the indoor or will be emitted when the unit is turned on. This can be mitigated by covering
outdoor unit the unit during long periods of inactivity.
The unit may absorb odors from the environment (such as furniture, cooking,
The unit emits a cigarettes, etc.) which will be emitted during operations.
bad odor
The unit’s filters have become moldy and should be cleaned.

The fan of the

outdoor unit During operation, the fan speed is controlled to optimize product operation.
does not operate

 
 Troubleshooting Tips
When troubles occur, please check the following points before contacting a repair company.
Problem Possible Causes Solution
Power failure Wait for the power to be restored
The power switch is off Turn on the power
The unit
is not The fuse is burned out Replace the fuse
working Remote control batteries are dead Replace the remote control batteries
Troubleshooting

The unit’s 3-minute protection has

Wait three minutes after restarting the unit
been activated
Temperature setting may be higher
than the ambient room temperature Lower the temperature setting
The heat exchanger on the indoor
or outdoor unit is dirty Clean the affected heat exchanger

The air filter is dirty Remove the filter and clean it according
to instructions
Poor cooling The air inlet or outlet of either unit Turn the unit off, remove the obstruction
performance is blocked and turn it back on
Make sure that all doors and windows are
Doors and windows are open
closed while operating the unit
Excessive heat is generated by Close windows and curtains during
sunlight periods of high heat or bright sunshine
Low refrigerant due to leak or Check for leaks, re-seal if necessary and
long-term use top off refrigerant
There’s too much or too little Check for leaks and recharge the system
refrigerant in the system with refrigerant
There is air, incompressible gas or Evacuate and recharge the system with
The unit foreign material in the refrigeration refrigerant
starts and system.
stops Determine which circuit is blocked and replace
frequently System circuit is blocked the malfunctioning piece of equipment
The compressor is broken Replace the compressor
The voltage is too high or too low Install a manostat to regulate the voltage
The outdoor temperature is lower Check for leaks and recharge the system
than 7°C (44.5°F) with refrigerant
Poor heating Cold air is entering through doors Make sure that all doors and windows are
performance and windows closed during use
Low refrigerant due to leak or Check for leaks, re-seal if necessary and
long-term use top off refrigerant

 
 Accessories

The air conditioning system comes with the following accessories. Use all of the installation parts and
accessories to install the air conditioner. Improper installation may result in water leakage, electrical
shock and fire, or cause the equipment to fail. The items are not included with the air conditioner must
be purchased separately.

Name of Accessories Q‘ty(pc) Shape Name of Accessories Q‘ty(pc) Shape

Drain joint
2~4 1
Manual (some models)

Installation plate Seal ring

1 1
(some models) (some models)

Accessories
5-8 Magnetic ring (Hitch
Plastic expansion (depending
sheath (some models) on models) it on the connective
Varies
cable between indoor
5-8 by model
unit and outdoor unit
Self-Tapping Screw A (depending after installation.)
(some models) on models) (some models)

Transfer connector Optional Cord protection rubber

(packed with the part ring(If the cord clamp
indoor or outdoor (one piece/ cannot fasten on a
unit, depending on one indoor small cord, use the
models) unit) cord protection rubber
NOTE: Pipe size may ring [supplied with
differ from appliance Optional accessories] to wrap 1
to appliance. To meet part around the cord. Then
different pipe size (1-5 pieces fix it in place with the
requirements, for outdoor cord clamp.)
sometimes the pipe unit, (some models)
connections need a depending
transfer connector on models)
installed on the
outdoor unit .

Optional accessories
• There are two types of remote controls: wired and wireless.
Select a remote controller based on customer preferences and requirements and install in an
appropriate place.
Refer to catalogues and technical literature for guidance on selecting a suitable remote controller.

Name Shape Quantity(PC)

Φ 6.35( 1/4 i n)
Liquid side
Φ9.52( 3/8in) Parts you must purc hase
separately. Consult the dealer
Connecting pipe Φ9.52( 3/8in) about the proper pipe size of
assembly Gas side the unit you purchased.
Φ12.7( 1/2in)

Φ16( 5/8in)

 
 Installation Summary
INSTALLATION ORDER

1 2 3 L (L1) N (L2)

Install the outdoor unit Connect the refrigerant pipes Connect the wires
Installation
Summary

5 4
MC MC

Perform a test run Evacuate the refrigeration

system

 
 Installation Diagram

Installation Diagram

4 3 2 Mounting screw
ST3.9×25-C-H 1
Air-break
Installation plate

Outdoor Unit
Switch

Clip anchor

Air-break Switch

1
Remote
controller
2
holder Drainage
Pipe

543

Outdoor Unit
Power Cable

Installation
The maximum

Diagram
amount of the
Mo connection cables is 5.
re t This section is for
han reference only.

(1)

Mounting screw
ST3.9×25-C-H Installation
Safety Precautions plate

Clip anchor

CAUTION
• To prevent wall damage, use a stud finder to
locate studs.
• A minimum pipe run of 3 metres is required
to minimise vibration & excessive noise. Refrigerant

Two of the A, B, and C air circulation pathways

pipe
•
must be free from obstructions at all times.
• This illustration is for demonstration
purposes only. Remote
controller
holder
• The actual shape of your air condtioner may
be slightly different.
• Copper lines must be independently insulated. Mo
re t
han

NOTE: The installation must be performed in

accordance with the requirement of local and
national standards. The installation may be (2)

slightly different in different areas.

 
 Specifications

Number of units that can be used Connected units 1-5 units

together
Compressor stop/start frequency Stop time 3 min or more
voltage fluctuation within ±10% of rated voltage
Power source voltage voltage drop during start within ±15% of rated voltage
interval unbalance within ±3% of rated voltage

Unit: m/ft.
1 drive 2 1 drive 3 1 drive 4 1 drive 5
Max. length for all rooms 40131 60/197 80/262 80/262
Max. length for one indoor unit 25/82 30/98 35/115 35/115
Max. height different between indoor and outdoor unit 15/49 15/49 15/49 15/49
Max. height different between indoor units 10/33 10/33 10/33 10/33

NOTE: For the units adopt quick connectors, no more than two pipes can be connected, and the Max.
length for each pipe is 7.5 meters.

When installing multiple indoor units with a single outdoor unit, ensure that the length of the
refrigerant pipe and the drop height between the indoor and outdoor units meet the requirements
illustrated in the following diagram:
Outdoor unit
Indoor unit
Specifications

Max.Height difference

Indoor unit

15m(49ft)

10m(32.8ft)

15m(49ft)

Indoor unit

 
 Outdoor Unit Installation
Install the unit by following local codes and DO NOT install unit in the following locations:
regulations , there may be differ slightly Near an obstacle that will block air inlets
between different regions. and outlets
Near a public street, crowded areas, or
6 0 cm ( 2 4 i n ) a b o ve

where noise from the unit will disturb others

Near animals or plants that will be harmed
in) l by hot air discharge
(12 wal
c m k
30 bac Near any source of combustible gas
m
fro
30cm
(12
In a location that is exposed to large
on le in) amounts of dust
ft
In a location exposed to a excessive amounts
60cm of salty air
(2
on rig 4in)
ht
in)
SPECIAL CONSIDERATIONS FOR EXTREME
(79
0 c m nt
o
WEATHER
20 in fr
If the unit is exposed to heavy wind:
Install unit so that air outlet fan is at a 90°
Installation Instructions – Outdoor unit angle to the direction of the wind. If needed,
build a barrier in front of the unit to protect it
Step 1: Select installation location from extremely heavy winds.
Before installing the outdoor unit, you must See Figures below.
choose an appropriate location. The following are
standards that will help you choose an appropriate Strong wind

location for the unit.

Wind Baffle
Proper installation locations meet the Strong
wind
following standards:
 Meets all spatial requirements shown in
Installation Space Requirements above.
Strong wind

Outdoor Unit
 Good air circulation and ventilation
 Firm and solid—the location can support the If the unit is frequently exposed to heavy Installation
unit and will not vibrate rain or snow:
Build a shelter above the unit to protect
 Noise from the unit will not disturb others it from the rain or snow. Be careful not to
 Protected from prolonged periods of direct obstruct air flow around the unit.
sunlight or rain If the unit is frequently exposed to salty air
 Where snowfall is anticipated, raise the (seaside):
unit above the base pad to prevent ice Use outdoor unit that is specially designed to
buildup and coil damage. Mount the unit resist corrosion.
high enough to be above the average
accumulated area snowfall. The minimum
height must be 18 inches

 
 Step 2: Install drain joint Step 3: Anchor outdoor unit
(Heat pump unit only) The outdoor unit can be anchored to the
Before bolting the outdoor unit in place, you must ground or to a wall-mounted bracket with
install the drain joint at the bottom of the unit. bolt(M10). Prepare the installation base of the
Note that there are two different types of drain unit according to the dimensions below.
joints depending on the type of outdoor unit.
UNIT MOUNTING DIMENSIONS
If the drain joint comes with a rubber seal
(see Fig. A ), do the following: The following is a list of different outdoor
1. Fit the rubber seal on the end of the drain joint unit sizes and the distance between their
that will connect to the outdoor unit. mounting feet. Prepare the installation base
2. Insert the drain joint into the hole in the base of the unit according to the dimensions
pan of the unit. below.
3. Rotate the drain joint 90° until it clicks in place
Outdoor Unit Types and Specifications
facing the front of the unit.
4. Connect a drain hose extension (not included) Split Type Outdoor Unit
to the drain joint to redirect water from the
unit during heating mode.
H
If the drain joint doesn’t come with a rubber
seal (see Fig. B ), do the following:
1. Insert the drain joint into the hole in the base
pan of the unit. The drain joint will click in
place. W
W
2. Connect a drain hose extension (not included)
to the drain joint to redirect water from the
unit during heating mode.

H
Outdoor Unit

Base pan hole of

Installation

outdoor unit
Seal
Seal
A

Drain joint

(A) (B) D B

IN COLD CLIMATES
In cold climates, make sure that the drain hose
is as vertical as possible to ensure swift water
drainage. If water drains too slowly, it can
freeze in the hose and flood the unit.

 
 (unit: mm/inch) Notes On Drilling Hole In Wall
Outdoor Unit Dimensions Mounting Dimensions You must drill a hole in the wall for the
WxHxD Distance A Distance B refrigerant piping, and the signal cable that will
760x590x285 (29.9x23.2x11.2) 530 (20.85) 290 (11.4) connect the indoor and outdoor units.
810x558x310 (31.9x22x12.2) 549 (21.6) 325 (12.8) 1. Determine the location of the wall hole
845x700x320 (33.27x27.5x12.6) 560 (22) 335 (13.2) based on the location of the outdoor unit.
900x860x315 (35.4x33.85x12.4) 590 (23.2) 333 (13.1) 2. Using a 65-mm (2.5”) core drill, drill a hole
945x810x395 (37.2x31.9x15.55) 640 (25.2) 405 (15.95) in the wall.
990x965x345 (38.98x38x13.58) 624 (24.58) 366 (14.4) NOTE: When drilling the wall hole, make
938x1369x392 (36.93x53.9x15.43) 634 (24.96) 404 (15.9) sure to avoid wires, plumbing, and other
900x1170x350 (35.4x46x13.8) 590 (23.2) 378 (14.88)
sensitive components.
800x554x333 (31.5x21.8x13.1) 514 (20.24) 340 (13.39) 3. Place the protective wall cuff in the hole.
845x702x363 (33.27x27.6x14.3) 540 (21.26) 350 (13.8) This protects the edges of the hole and
946x810x420 (37.2x31.9x16.53) 673 (26.5) 403 (15.87) helps seal it when you finish the
946x810x410 (37.2x31.9x16.14) 673 (26.5) 403 (15.87) installation process.
952x1333x410 (37.5x52.5x16.14) 634 (24.96) 404 (15.9)
952x1333x415 (37.5x52.5x16.14) 634 (24.96) 404 (15.9) When Select a 24K Indoor Unit
890x673x342 (35.0”x 26.5”x 13.5”) 663 (26.1”) 354 (13.9”)
The 24K indoor unit can only be connected with
Rows of series installation an A system. If there are two 24K indoor units,
The relations between H, A and L are they can be connected with A and B systems.
as follows. Connective pipe size of an A and B system
L A (unit: inch)
L ≤ 1/2H 25 cm / 9.8” or more Indoor Unit capacity
L≤H Liquid Gas
(Btu/h)
1/2H < L ≤ H 30 cm / 11.8” or more
7K/9K/12K 1/4 3/8
L H Can not be installed 12K/18K 1/4 1/2
24K 3/8 5/8

Outdoor Unit
L Installation
A
re
mo
or
18”
25 /1
c m
or m / 0c
mo 9.8 30
re ”
25
c
or m / 9 3.6
”
mo .8 /2
re ” cm ore
0
6 rm
o
H m
/5
9”
5 0 c more
1 r
o

 
 Refrigerant Piping Connection

NOTE: For quick-connect models, please DO NOT DEFORM PIPE

refer to the internal machine manual for the WHILE CUTTING
installation method of the connecting pipe.
The external machine manual does not Be extra careful not to damage, dent, or deform
repeat the instructions. the pipe while cutting. This will drastically reduce
the heating efficiency of the unit.
When connecting refrigerant piping, do not
let substances or gases other than the specified
refrigerant enter the unit. The presence of other Step 2: Remove burrs.
Burrs can affect the air-tight seal of refrigerant
gases or substances will lower the unit’s capacity,
piping connection. They must be completely
and can cause abnormally high pressure in the
removed.
refrigeration cycle. This can cause explosion and
1. Hold the pipe at a downward angle to
injury. prevent burrs from falling into the pipe.
Connection Instructions – 2. Using a reamer or deburring tool, remove
Refrigerant Piping all burrs from the cut section of the pipe.
Pipe
CAUTION Reamer
• The branching pipe must be installed
horizontally. An angle of more than 10° may Point down
cause malfunction.
• DO NOT install the connecting pipe until
both indoor and outdoor units have been
installed. Step 3: Flare pipe ends
• Insulate both the gas and liquid piping to
Proper flaring is essential to achieve an airtight
prevent water leakage. seal.
Step 1: Cut pipes 1. After removing burrs from cut pipe, seal
When preparing refrigerant pipes, take extra the ends with PVC tape to prevent foreign
care to cut and flare them properly. This will materials from entering the pipe.
ensure efficient operation and minimize the 2. Sheath the pipe with insulating material.
need for future maintenance.
1. Measure the distance between the indoor 3. Place flare nuts on both ends of pipe.
Refrigerant Piping

Make sure they are facing in the right

2. and outdoor units.
Connection

Using a pipe cutter, cut the pipe a little longer direction, because you can’t put them on
than the measured distance. or change their direction after flaring.
3. Make sure that the pipe is cut at a perfect 90°
Flare nut
angle.

90°
Oblique Rough Warped Copper pipe

 
4. Remove PVC tape from ends of pipe when
ready to perform flaring work.
5. Clamp flare form on the end of the pipe. The
end of the pipe must extend beyond the flare
Indoor unit tubing Flare nut Pipe
form.
Flare form
3. Tighten the flare nut as tightly as possible
by hand.
4. Using a spanner, grip the nut on the unit
Pipe tubing.

5. While firmly gripping the nut, use a torque

6. Place flaring tool onto the form. wrench to tighten the flare nut according to
the torque values in above table.
7. Turn the handle of the flaring tool
clockwise until the pipe is fully flared. Flare
the pipe in accordance with the dimensions . NOTE: Use both a spanner and a torque
wrench when connecting or disconnecting
pipes to/from the unit.
PIPING EXTENSION BEYOND FLARE FORM
Pipe Tightening Flare dimension (A) Flare shape
gauge torque (Unit: mm/Inch)
Min. Max .

Ø 6.4 18-20 N.m 8.4/0.33 8.7/0.34 90 °± 4

(183-204 kgf.cm)
45 °
±2
Ø 9.5 25-26 N.m 13.2/0.52 13.5/0.53 A
(255-265 kgf.cm)

Ø 12.7 35-36 N.m 16.2/0.64 16.5/0.65 R0.4~0.8

(357-367 kgf.cm)

Ø 15.9 45-47 N.m 19.2/0.76 19.7/0.78

(459-480 kgf.cm)
65-67 N.m
Ø 19.1 (663-683 kgf.cm) 23.2/0.91 23.7/0.93

75-85N.m
Ø 22 (765-867 kgf.cm) 26.4/1.04 26.9/1.06

8. Remove the flaring tool and flare form, CAUTION

then inspect the end of the pipe for cracks
and even flaring. • Ensure to wrap insulation around the piping.
Direct contact with the bare piping may
Step 4: Connect pipes result in burns or frostbite.
• Make sure the pipe is properly connected.
Connect the copper pipes to the indoor unit first, Over tightening may damage the bell
then connect it to the outdoor unit. You should mouth and under tightening may lead to
first connect the low-pressure pipe, then the
Refrigerant Piping

leakage.
Connection

high-pressure pipe.

1. When connecting the flare nuts, apply a thin

coat of refrigeration oil to the flared ends of
the pipes.
2. Align the center of the two pipes that you will
connect.

 
 NOTE ON MINIMUM BEND RADIUS 7. Thread this pipeline through the wall and
connect it to the outdoor unit.
Carefully bend the tubing in the middle 8. Insulate all the piping, including the valves
according to the diagram below. DO NOT of the outdoor unit.
bend the tubing more than 90° or more than 9. Open the stop valves of the outdoor unit to
3 times. start the flow of the refrigerant between
the indoor and outdoor unit.
Bend the pipe with thumb

CAUTION
Check to make sure there is no refrigerant
leak after completing the installation work.
If there is a refrigerant leak, ventilate the area
immediately and evacuate the system (refer
min-radius 10cm (3.9”) to the Air Evacuation section of this manual).
6. After connecting the copper pipes to the
indoor unit, wrap the power cable, signal
cable and the piping together with binding
tape.

NOTE: DO NOT intertwine signal cable with

other wires. While bundling these items
together, do not intertwine or cross the signal
cable with any other wiring.
Refrigerant Piping
Connection

 
 Wiring

BEFORE PERFORMING ANY 13. Make sure that you do not cross your
ELECTRICAL WORK, READ electrical wiring with your signal wiring.
This may cause distortion and
THESE REGULATIONS interference.
1. All wiring must comply with local and national 14. The unit must be connected to the
electrical codes, regulations and must be main outlet. Normally, the power supply
installed by a licensed electrician. must have a impedance of 32 ohms.
2. All electrical connections must be made 15. No other equipment should be
according to the Electrical Connection Diagram connected to the same power circuit.
located on the panels of the indoor and outdoor 16. Connect the outdoor wires before
units.
connecting the indoor wires.
3. If there is a serious safety issue with the power
supply, stop work immediately. Explain your
reasoning to the client, and refuse to install the WARNING
unit until the safety issue is properly resolved.
4. Power voltage should be within 90-110% of BEFORE PERFORMING ANY
rated voltage. Insufficient power supply can
cause malfunction, electrical shock, or fire. ELECTRICAL OR WIRING WORK,
5. If connecting power to fixed wiring, a TURN OFF THE MAIN POWER TO
surgeprotector and main power switch should THE SYSTEM.
be installed.
6. If connecting power to fixed wiring, a switch NOTE ON AIR SWITCH
or circuit breaker that disconnects all poles and
has a contact separation of at least 1/8in (3mm) When the maximum current of the air
must be incorporated in the fixed wiring. The conditioner is more than 16A, an air
qualified technician must use an approved switch or leakage protection switch with
circuit breaker or switch. protective device shall be used
7. Only connect the unit to an individual branch (purchased seperately) .
circuit outlet. Do not connect another When the maximum current of the air
appliance to that outlet. conditioner is less than 16A, the power
8. Make sure to properly ground the air conditioner. cord of air conditioner shall be
9. Every wire must be firmly connected. Loose equipped with plug (purchased
wiring can cause the terminal to overheat, seperately).
The North American market is wired
resulting in product malfunction and possible fire.
according to NEC and CEC requirements.
10.Do not let wires touch or rest against refrigerant
tubing, the compressor, or any moving parts Air switch
(A)
within the unit. (purchased seperately)

11. If the unit has an auxiliary electric heater, it must

Outdoor unit power wires Indoor & Outdoor
be installed at least 1 meter (40in) away from connective wires
any combustible materials. (purchased seperately)

12.To avoid getting an electric shock, never touch

Wiring

Outdoor unit
the electrical components soon after the power
Indoor unit
supply has been turned off. After turning off
the power, always wait 10 minutes or more
before you touch the electrical components.

 
 (B) 1. Prepare the cable for connection
Air switch
a. You must first choose the right cable
Indoor unit power wires (purchased seperately)
size. Be sure to use H07RN-F cables.

NOTE: In North America, choose the cable

type according to the local electrical codes
and regulations.
Indoor unit
Outdoor unit
Minimum Cross-Sectional Area of
Power and Signal Cables (For reference)
Indoor & Outdoor
connective wires Rated Current of Nominal Cross-Sectional
(purchased seperately) Appliance (A) Area (mm²)
(C) Air switch > 3 and ≤ 6 0.75
(purchased seperately) Air switch > 6 and ≤ 10 1
Indoor unit power wires (purchased seperately) > 10 and ≤ 16 1.5
> 16 and ≤ 25 2.5
Outdoor unit power wires 4
> 25 and ≤ 32
> 32 and ≤ 40 6

Indoor unit
Outdoor unit CHOOSE THE RIGHT CABLE SIZE
The size of the power supply cable, signal
Indoor & Outdoor cable, fuse, and switch needed is determined
connective wires by the maximum current of the unit. The
(purchased seperately) maximum current is indicated on the nameplate
(D) (Only for the North American) located on the side panel of the unit. Refer to
Air switch this nameplate to choose the right cable, fuse,
(purchased seperately) or switch.
NOTE: In North America, please choose the
Outdoor unit power wires Indoor & Outdoor
connective wires right cable size according to the Minimum
(purchased seperately) Circuit Ampacity indicated on the nameplate
of the unit.
Outdoor unit

Air switch
Indoor unit b. Using wire strippers, strip the rubber
(purchased seperately) jacketfrom both ends of the signal cable
to reveal approximately 15cm (5.9”) of
wire.
c. Strip the insulation from the ends.
NOTE: The cographs are for explanation
purpose only. Your machine may be d. Using a wire crimper, crimp u-lugs on the
slightly different. The actual shape shall ends.
prevail. NOTE: When connecting the wires, strictly
follow the wiring diagram found inside the
Outdoor Unit Wiring electrical box cover.
Wiring

WARNING
Before performing any electrical or wiring
work, turn off the main power to the
system.

 
2. Remove the electric cover of the outdoor unit. If there is no cover on the outdoor unit, take
off the bolts from the maintenance board and remove the protection board.

Cover

Screw

3. Connect the u-lugs to the terminals Match the wire colors/labels with the labels on
the terminal block, and firmly screw the u-lug of each wire to its corresponding terminal.
4. Clamp down the cable with designated cable clamp.
5. Insulate unused wires with electrical tape. Keep them away from any electrical or metal parts.
6. Reinstall the cover of the electric control box.

Harmonic declaration
"The equipment M4OB-36HFN8-Q complies with IEC 61000-3-12 provided that the shortcircuit power
Ssc is greater than or equal to 4787737.5 at the interface point between the user’s supply and the
public system. It is the responsibility of the installer or user of the equipment to ensure, by
consultation with the distribution network operator if necessary, that the equipment is con-nected
only to a supply with a short-circuit power Ssc greater than or equal to 4787737.5."
"The equipment M5OD-42HFN8-Q complies with IEC 61000-3-12 provided that the shortcircuit power
Ssc is greater than or equal to 3190042.5 at the interface point between the user’s supply and the
public system. It is the responsibility of the installer or user of the equipment to ensure, by
consultation with the distribution network operator if necessary, that the equipment is con-nected
only to a supply with a short-circuit power Ssc greater than or equal to 3190042.5."

Wiring Figure

CAUTION
Connect the connective cables to the terminals, as identified, with their matching numbers
on the terminal block of the indoor and outdoor units. For example, Terminal L1(A) of the
outdoor unit must connect with terminal L1/1 on the indoor unit. The outdoor unit can
match different types of indoor unit, the numbers on the terminal block of the indoor unit
may be slightly different. Please pay special attention while connecting the wire.
OPTIONAL

Wiring

or or

 
 NOTE: For quick-connector models, please refer to <<Owner’s Manual & Installation Manual >>
packed with the indoor unit.

NOTE:Refer to the following figures if end-users wish to perform their own wiring.
Run the main power cord through the lower line-outlet of the cord clamp.
---- This symbol indicates field wiring.

One-two models: OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

Model A Model B Model C Model D

L(A) N(A) S(A) L(B) N(B) S(B) L(A) N(A) S(A) L(B) N(B) S(B)

OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL
OPTIONAL
OPTIONAL

OPTIONAL
OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

Model E Model F Model G Model H

NOTE:Use the magnetic ring ( not supplied, optional part) to hitch the connective cable of
indoorand outdoor units after installation.One magnetic ring is used for one cable

S(2) S(A) N(A) L(A) N S(2) S(A) N(A) L(A) N S(2) S(A) N(A) L(A) N
L N

S(1) S(B) N(B) L(B) L S(1) S(B) N(B) L(B) L

OPTIONAL

OPTIONAL

S(1) S(B) N(B) L(B) L

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

POWER W W
POWER POWER
SUPPLY
Wiring

SUPPLY SUPPL Y
TO B TO A TO B TO A
or 1(L) 2(N) 3(S) or 1(L) 2(N) 3(S)

TO B TO A

Model I Model J Model K Model L

 
 L(A) N(A) S(A) L(B) N(B) S(B) L(A) N(A) S(A) L(B) N(B) S(B)

OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL

OPTIONAL
OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL
Model M Model N Model O
OPTIONAL

OPTIONAL
OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL
Model P Model Q Model R

L1 L2 1(A) 2(A) 3(A) 1(B) 2(B) 3(B) L1 L2 L1(A) L2(A) S(A) L1(B) L2(B)S(B)
OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL
OPTIONAL

POWER 1 2 3 1 2 3 POWER 1 2 3 1 2 3
SUPPLY SUPPLY

Model S Model T

L N L N
OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL

POWER
POWER
SUPPLY
SUPPLY or or
or or
or or or
or or
or To indoor To indoor
Wiring

To indoor To indoor unit A unit B

To indoor To indoor unit A unit B
unit A unit B

Model U Model V Model W

 
 OPTIONAL
OPTIONAL
OPTIONAL
Model C

Model F

Model I
OPTIONAL
OPTIONAL OPTIONAL OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL

Model H
Model B

Model E
OPTIONAL
OPTIONAL OPTIONAL OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL

To indoor
1(L) 2(N) 3(S)

unit C
OPTIONAL OPTIONAL OPTIONAL

or

or
or
OPTIONAL

Model D

Model G
Model A

Model J
To indoor
1(L) 2(N) 3(S)
One-three models:

OPTIONAL

unit B
OPTIONAL
OPTIONAL OPTIONAL OPTIONAL
OPTIONAL

To indoor
1(L) 2(N) 3(S)

unit A
OPTIONAL

or

or
or


OPTIONAL OPTIONAL

N
L
OPTIONAL
OPTIONAL


Wiring
 Wiring



OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL

Model H
Model F
Model D
Model B

OPTIONAL
OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL

POWER SUPPLY
OPTIONAL

L1 L2
OPTIONAL

N
OPTIONAL

L
OPTIONAL
OPTIONAL

POWER SUPPLY
OPTIONAL

1(L) 2(N) 3(S)

L1 L2
OPTIONAL
OPTIONAL

1(L) 2(N) 3(S)

OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL

1(L) 2(N) 3(S)

Model C
One-four models:

Model G
Model E
OPTIONAL

Model A
OPTIONAL OPTIONAL
OPTIONAL

or
OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL

1(L) 2(N) 3(S)

or
OPTIONAL
OPTIONAL OPTIONAL OPTIONAL
 OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
Model L
Model J

OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL OPTIONAL
POWER SUPPLY
L1 L2

OPTIONAL OPTIONAL

L(C) N(C) S(C) L(D) N(D) S(D)

To indoor
OPTIONAL
POWER SUPPLY

unit D
L1 L2

To indoor
OPTIONAL

unit C
OPTIONAL
OPTIONAL

or

or
OPTIONAL
OPTIONAL

Model M
To indoor
Mode K

unit B
Model I
OPTIONAL
OPTIONAL OPTIONAL

To indoor
OPTIONAL OPTIONAL

unit A


or

or
OPTIONAL OPTIONAL


OPTIONAL
Wiring
 Wiring
OPTIONAL
POWER SUPPLY


N
L


OPTIONAL OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL OPTIONAL
Model B

Model D

Model F

Model H
OPTIONAL OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL
OPTIONAL

POWER SUPPLY
1(L) 2(N) 3(S)

OPTIONAL

L1 L2
OPTIONAL OPTIONAL
1(L) 2(N) 3(S)

OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL
1(L) 2(N) 3(S)
OPTIONAL

Model A

Model C

Model E

Model G
OPTIONAL OPTIONAL

or
OPTIONAL

1(L) 2(N) 3(S)

One-five models:

OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL

1(L) 2(N) 3(S)

OPTIONAL
OPTIONAL
OPTIONAL OPTIONAL

or
OPTIONAL
OPTIONAL OPTIONAL
OPTIONAL
 L1 L2 L1 L2

OPTIONAL
OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL
OPTIONAL
OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL
OPTIONAL
POWER SUPPLY POWER SUPPLY

Model I Model J

L1 L2
OPTIONAL
OPTIONAL

OPTIONAL
OPTIONAL

OPTIONAL

OPTIONAL
POWER SUPPLY

Model K

CAUTION
After confirmation of the above conditions, follow these guidelines when performing wiring:
• Always have an individual power circuit specifically for the air conditioner. Always follow
the circuit diagram posted on the inside of the control cover.
• Screws fastening the wiring in the casing of electrical fittings may come loose during
transporation. Because loose screws may cause wire burn-ou, check that the screws are
tightly fastened.
• Check the specifications for the power source.
• Confirm that electrical capacity is sufficient.
• Confirm that starting voltage is maintained at more than 90 percent of the rated voltage
marked on the name plate.
• Confirm that the cable thickness is as specified in the power source specifications.
• Always install an earth leakage circuit breaker in wet or moist areas.
• The following can be caused by a drop in voltage: vibration of a magnetic switch,
damaging the contact point, broken fuses, and disturbance of normal functioning.
• Disconnection from a power supply must be incorporated into the fixed wiring. It must
have an air gap contact separation of at least 3mm in each active (phase) conductors.
• Before accessing terminals, all supply circuits must be disconnected.

NOTE:
To satisfy the EMC compulsory regulations, which is required by the international standard
CISPR 14-1:2005/A2:2011 in specific countries or districts ,please make sure you apply the
correct magnetic rings on your equipment according to the wiring diagram that adhere to
Wiring

the your equipment .

Please contact your distributor or installer to get further information and purchase
magnetic rings (The supplier of magnetic ring is TDKmodel ZCAT3035-1330or similar) .

 
 Air Evacuation

Preparations and Precautions NOTE: If there is no change in system pressure,

unscrew the cap from the packed valve (high
Air and foreign matter in the refrigerant circuit can pressure valve). If there is a change in system
cause abnormal rises in pressure, which can damage pressure, there may be a gas leak.
the air conditioner, reduce its efficiency, and cause 8. Insert hexagonal wrench into the packed valve
injury. Use a vacuum pump and manifold gauge to (high pressure valve) and open the valve by
evacuate the refrigerant circuit, removing any turning the wrench 1/4 counterclockwise.
non-condensable gas and moisture from the system. Listen for gas to exit the system, then close the
Evacuation should be performed upon initial valve after 5 seconds.
installation and when unit is relocated.
Flare nut
BEFORE PERFORMING EVACUATION
 Check to make sure the connective pipes
between the indoor and outdoor units
are connected properly .
 Check to make sure all wiring is connected Cap
Valve body
Evacuation Instructions Valve stem

Before using a manifold gauge and a vacuum 9. Watch the Pressure Gauge for one minute to make
pump, read their operation manuals to make sure that there is no change in pressure. It should
sure you know how to use them properly. read slightly higher than the atmospheric pressure.
Manifold Gauge 10.Remove the charge hose from the service port.
Compound gauge Pressure gauge
11. Using hexagonal wrench, fully open both the
high pressure and low pressure valves.
-76cmHg

Low pressure valve High pressure valve OPEN VALVE STEMS GENTLY
Charge hose Charge hose When opening valve stems, turn the hexagonal
wrench until it hits against the stopper. DO NOT
Vacuum pump
try to force the valve to open further.
12.Tighten valve caps by hand, then tighten it
Low pressure valve using the proper tool.
13.If the outdoor unit uses all vacuum valves,
1. Connect the manifold gauge’s charge hose and the vacuum position is at the main valve,
to the service port on the outdoor unit’s low the system is not connected with the indoor
pressure valve. unit. The valve must be tightened with a
2. Connect the manifold gauge’s charge hose screw nut. Check for gas leaks before
from the to the vacuum pump. operation to prevent leakage.
3. Open the Low Pressure side of the manifold
gauge. Keep the High Pressure side closed.
4. Turn on the vacuum pump to evacuate the system.
5. Run the vacuum for at least 15 minutes, or until
the Compound Meter reads -76cmHG (-1x105Pa).
6. Close the manifold gauge’s Low Pressure valve
and turn off the vacuum pump.
7. Wait for 5 minutes, then check that there has
Air Evacuation

been no change in system pressure.

 
 Note On Adding Refrigerant

CAUTION
• Refrigerant charging must be performed after wiring, vacuuming, and the leak testing.
• DO NOT exceed the maximum allowable quantity of refrigerant or overcharge the system.
Doing so can damage the unit or impact it’s functioning.
• Charging with unsuitable substances may cause explosions or accidents. Ensure that the
appropriate refrigerant is used.
• Refrigerant containers must be opened slowly. Always use protective gear when charging the
system.
• DO NOT mix refrigerants types.
• For the R290 or R32 refrigerant model, make sure the condtions within the area have been
made safe by control of flammable material when the refrigerant added into air conditioner.
N=2(one-twin models), N=3(one-three models), N=4(one-four models), N=5(one-five models).
Depending on the length of connective piping or the pressure of the evacuated system, you
made need to add refrigerant. Refer to table below for refrigerant amounts to be added:

ADDITIONAL REFRIGERANT PER PIPE LENGTH

Connective Pipe Air Purging

Additional Refrigerant
Length(m) Method
Pre-charge pipe length (ft/m) N/A
Vacuum Pump
(pre-charge pipe length xN )

Liquid Side: Ø 6.35 (Ø 1/4”) Liquid Side: Ø 9.52 (Ø 3/8”)

R32 R32
(Total pipe length - pre-charge pipe lengthxN) x12g/m (Total pipe length - pre-charge pipe lengthxN) x24g/m
(Total pipe length - pre-charge pipe lengthxN) x0.13oZ/ft (Total pipe length - pre-charge pipe lengthxN) x0.26oZ/ft
More than (pre-charge Vacuum Pump
pipe lengthxN) ft/m
Liquid Side: Ø 6.35 (Ø 1/4”) Liquid Side: Ø 9.52 (Ø 3/8”)
R410A R410A
(Total pipe length - pre-charge pipe lengthxN) x15g/m (Total pipe length - pre-charge pipe lengthxN) x30g/m
(Total pipe length - pre-charge pipe lengthxN) x0.16oZ/ft (Total pipe length - pre-charge pipe lengthxN) x0.32oZ/ft

NOTE: The standard pipe length is 7.5m.

Air Evacuation

 
Only for Australia models :
• DO NOT mix refrigerants types.
N=2(one-twin models),N=3(one-three models),N=4(one-four models),N=5(one-five models).
Some systems require additional charging depending on pipe lengths. The standard pipe length
is 10m. The additional refrigerant to be charged can be calculated using the following formula:

ADDITIONAL REFRIGERANT PER PIPE LENGTH

Connective Pipe Air Purging

Additional Refrigerant(R410A)
Length(m) Method
Less than N/A
Vacuum Pump
Standard pipe length x N

More than Liquid Side: Ø 6.35 (Ø 1/4”) Liquid Side: Ø 9.52 (Ø 3/8”)
Vacuum Pump
Standard pipe length x N (Total pipe length - pre-charge pipe lengthxN) x15g/m (Total pipe length - pre-charge pipe lengthxN) x30g/m

Make sure to remove the additional refrigerant charge according to the rated volume (5m
refrigerant piping) when doing market or government verification test.

Air Evacuation

 
 Safety And Leakage Check

Electrical safety check Gas leak check

Perform the electrical safety check after 1. Soap water method:
completing installation. Cover the following Apply a soap-water solution or a liquid
areas: neutral detergent on the indoor unit
1. Insulated resistance connection or outdoor unit connections with
The insulated resistance must be more a soft brush to check for leakage of the
than 2MΩ. connecting points of the piping. If bubbles
2. Grounding work emerge, the pipes are experiencing leakage.
After finishing grounding work, measure 2. Leak detector
the grounding resistance by visual detection Use the leak detector to check for leakage.
and using the grounding resistance tester.
Make sure the grounding resistance is less NOTE: The illustration is for example purposes
than 4Ω. only. The actual order of A, B, C, D, and E on
3. Electrical leakage check (performing during the machine may be slightly different from the
test while unit is on) unit you purchased but the general shape will
During a test operation after completed remain the same.
installation, the use the electroprobe and
multimeter to perform an electrical leakage
check. Turn off the unit immediately if
leakage happens. Try and evaluate different
solutions until the unit operates properly. Indoor unit
check point

Outdoor unit
check point

A, B,C,D are points for one-four type.

A, B,C,D, and E are points for the one-five type.
Air Evacuation

 Page 40 
 Test Run

Before Test Run f. Check to see that the drainage system is

unimpeded and draining smoothly.
A test run must be performed after the entire g. Ensure there is no vibration or abnormal
system has been completely installed. Confirm noise during operation.
the following points before performing the test: 5. For the Outdoor Unit
a) The indoor and outdoor units are properly a. Check to see if the refrigeration system is
installed. leaking.
b) Piping and wiring are properly connected. b. Make sure there is no vibration or
c) No obstacles near the inlet and outlet of the abnormal noise during operation.
unit that might cause poor performance or c. Ensure the wind, noise, and water
product malfunction. generated by the unit do not disturb your
d) The refrigeration system does not leak. neighbors or pose a safety hazard.
e) Drainage system is unimpeded and draining
to a safe location. NOTE: If the unit malfunctions or does not
f) The heating insulation is properly installed. operate according to your expectations,
g) The grounding wires are properly connected. please refer to the Troubleshooting section
h) Length of the piping and additional of the Owner’s Manual before calling
refrigerant stow capacity have been recorded. customer service.
i) The power voltage is the correct voltage for
the air conditioner.

CAUTION
Failure to perform the test run may result in unit
damage, property damage or personal injury.
Test Run Instructions
1. Open both the liquid and gas stop valves.
2. Turn on the main power switch and allow the
unit to warm up.
3. Set the air conditioner to COOL mode.
4. For the Indoor Unit
a. Ensure the remote control and its buttons
work properly.
b. Ensure the louvers move properly and can
be changed using the remote control.
c. Double check to see if the room
temperature is being registered correctly.
d. Ensure the indicators on the remote control
and the display panel on the indoor unit
work properly.
e. Ensure the manual buttons on the indoor
unit works properly.
Test Run

 Page 41 
 Function of Automatic Wiring/Piping Correction

Automatic Wiring/Piping Correction Function

More recent models now feature automatic correction of wiring/piping errors. Press the "check
switch" on the outdoor unit PCB board for 5 seconds until the LED displays "CE”, indicatomg that
this function is working, Approximately 5-10 minutes after the switch is pressed, the "CE" disappears,
meaning that the wiring/piping error is corrected and all wiring/piping is properly connected.

Check switch

LED display

Correct

Terminal B
block A
Indoor unit B
Liquid/ B
Gas pipe A
Indoor unit A
Outdoor unit
Incorrect wiring

Terminal B
block A
Indoor unit B
Liquid/ B
Gas pipe A
Indoor unit A
Outdoor unit
Incorrect wiring

Terminal B
block A
Indoor unit B
Liquid/ B
Gas pipe A
Indoor unit A
Outdoor unit

How To Activate This Function

1. Check that outside temperature is above 5.
(This function does not work when outside temperature is not above 5)
2. Check that the stop valves of the liquid pipe and gas pipe are open.
3. Turn on the breaker and wait at least 2 minutes.
4. Press the check switch on the outdoor PCB board unit LED display "C E".
Piping Correction
Automatic Wiring/
Function of

 Page 42 
The design and specifications are subject to change without prior notice for
product improvement. Consult with the sales agency or manufacturer for details.
Any updates to the manual will be uploaded to the service website, please check
for the latest version.

QS003UI-YTD
16122300000557
20210723
WARNING for Using R32/R290 Refrigerant