Kaysun KCOF-22 DN2.4 User manual

OWNER'S MANUAL
VRF Indoor Units
Thank you very much for purchasing our air conditioner
Before using your air conditioner, please read this manual carefully and keep it for future reference.
Caution: The heating function of an indoor unit is available only when it is connected to a cooling
& heating outdoor unit.

Applied models:
KCOF-22 DN2.4
KCOF-36 DN2.4
KCOF-71 DN2.4
KCIF-15 DN3.0
KCIF-28 DN3.0
KCIF-36 DN3.0
KCIF-45 DN3.0
KCIBF-56 DN3.0
KCIBF-71 DN3.0
KCIBF-80 DN3.0
KCIBF-100 DN3.0
KCIBF-112 DN3.0
KCIBF-140 DN3.0
KPDF-15 DN3.0
KPDF-22 DN3.0
KPDF-28 DN3.0
KPDF-36 DN3.0
KPDF-45 DN3.0
KPDF-56 DN3.0
KPDF-71 DN3.0
KPDF-80 DN3.0
KPDF-90 DN3.0
KPDF-112 DN3.0
KPDF-140 DN3.0
KPDHF-71 DN3.0
KPDHF-90 DN3.0
KPDHF-112 DN3.0
KPDHF-140 DN3.0
KPDHF-160 DN3.0
KPDHF-200 DN3.0
KPDHF-250 DN3.0
KPDHF-280 DN3.0
KPDHF-400 DN2.4
KPDHF-450 DN2.4
KPDHF-560 DN2.4
KPCF-56 DN3.0
KPCF-90 DN3.0
KPCF-140 DN3.0
KAYF-22 DN3.0
KAYF-28 DN3.0
KAYF-36 DN3.0
KAYF-45 DN3.0
KAYF-56 DN3.0
KAYF-80 DN3.0
KSDF-28 DN2.3
KSDF-36 DN2.3
KSDF-45 DN2.3
KSF 56 DN2.3
KSF 80 DN2.3

Owner’s manual
1
CONTENTS PAGE
1. IMPORTANT+SAFETY+INFORMATION +
To prevent injury or property damage from mis-operations,
follow these instructions.
There are two types of safety precautions - please read both carefully.
Failure to observe a warning may result in serious injury or
death. The appliance must be installed in accordance with
national wiring regulations.
Failure to observe a caution may result in injury or damage
to the equipment.
The appliance should not be used by children without
supervision.
Children under 8 or those with a disability that prevents
safe use should not use the air conditioner. Other
children should be supervised when cleaning or using
the unit.
Ask your dealer to install the air conditioner.
If you install the unit incorrectly yourself, you risk water leaks,
electric shock, and fires.
Ask your dealer for information about upgrades, repairs,
and maintenance.
To avoid electric shocks, fires, and injury, power the unit off
and contact your dealer if the unit becomes faulty.
If you perform these tasks yourself, you risk water leaks,
electric shock, and fires.
Do not let the indoor unit or remote controller come into
contact with water.
Contact with water increases the risks of electric shocks or
fires.
Do not press the remote controller buttons with a hard,
pointed object.
The remote controller may be damaged.
Never replace a blown fuse with another that has a
different current rating.
Using wire or copper wire may cause the unit to break down
or cause a fire.
Avoid excessive direct exposure to the air flow.
Never use flammable sprays such as hair spray, lacquers,
or paint near the unit because doing so may result in a
fire.
It may cause a fire.
Never touch the air outlet or horizontal blades while the
swing flap is in use because your fingers may become
trapped or you might damage the unit.
Never put any objects into the air inlet or outlet.
Do not touch the fan with any object.
Do not inspect or service the unit yourself.
Ask a qualified service person to perform these tasks.
Do not dispose this product as unsorted
waste. It must be separately collected
and processed.
Do not dispose of electrical appliances
as unsorted waste. They must be
separately collected and processed.
Contact your local government for details.
If electrical appliances are disposed of in landfills or
dumps, hazardous substances can leak into the
groundwater and thus enter the food chain.
For information about refrigerant leaks, contact your
dealer.
When the system is installed in a small room, keep the
refrigerant below the limit; otherwise, if there's a leak, the
oxygen in the room may be affected, causing a serious
accident.
The refrigerant in the unit is safe and should not leak.
If it does and comes into contact with fire, a harmful gas will
result.
Turn off any combustible heating devices, ventilate the
room, and contact the dealer you purchased the unit
from.
Do not use the unit until a technician instructs you that it’s
safe to do so.
The heating function of the indoor unit is available
only when the indoor unit connected to the outdoor
unit for cooling and heating.
Only use the air conditioner for its prescribed purpose.
Do not use it for cooling precision instruments, food, plants,
animals, or art, or you may damage the unit.
Power the unit off before cleaning it to avoid electric
shocks.
Otherwise, an electric shock and injury may result.
IMPORTANT SAFETY INFORMATION ..................................................1
PARTS NAMES. ........................................................................................ 2
AIR CONDITIONER OPERATIONS AND PERFORMANCE................ 5
ADJUSTING AIR FLOW DIRECTION. ....................................................6
MAINTENANCE.......................................................................................10
POTENTIAL PROBLEMS....................................................................... 13
TROUBLESHOOTING. ...........................................................................14
WARNING
CAUTION
CAUTION
WARNING

Owner’s manual
2
To avoid electric shocks or fires, install an earth leak
detector.
Ensure the unit is grounded.
To avoid electric shocks, ensure the unit is grounded and that
the earth wire is not connected to a gas or water pipe, lightning
conductor, or telephone earth wire.
To avoid injury, do not remove the fan guard on the
outdoor unit.
Do not use the unit if your hands are wet.
Doing so puts you at risk of an electric shock.
Do not touch the heat exchanger fins.
These fins are sharp and you could cut you.
Do not place items which might be damaged by moisture
under the indoor unit.
Condensation may form if the humidity is above 80 percent, if
the drain outlet is blocked or if the filter is polluted.
Check the unit stand and fitting for damage after the unit
has been running for a long time.
If the stand is damaged, the unit may fall and cause an injury.
2. PART+NAMES +
■ Four-way cassette type
Air Out Louver (Adjustable)
For the detailed information about the
Two-direction or Three-direction Air Outlet,
please consult your local dealer.
Grounding Screw
(In the control box)
Lock buckle
(For closing the Air Grille)
Air Intake
(Intake air from here)
Air Filter
(Filter the dust in the intake air)
To avoid oxygen deficiency, ventilate the room
sufficiently if equipment with a burner is used at the same
time as the air conditioner.
Arrange the drainage hose to ensure smooth drainage.
Incomplete drainage may cause water leaks.
Do not touch the internal parts of the controller.
Do not remove the front panel. Some internal parts may cause
injury or be damaged.
Never expose little children, plants or animals directly to
the air flow.
Never expose children, plants or animals directly to the air
flow.
Do not allow a child to mount on the outdoor unit and
don’t place objects on it to avoid injury.
Falling or tumbling may result in injury.
Do not run the air conditioner when fumigating a room
with insecticide as chemicals could get in the unit,
causing respiratory problems for people affected.
Failure to observe could cause the chemicals to become
deposited in the unit, which could endanger the health of
those who are hypersensitive to chemicals.
Do not place appliances that produce open fire in places
in the path of the air flow from the unit or under the
indoor unit due to the risk of combustion or warping.
It may cause incomplete combustion or deformation of the
unit due to the heat.
To avoid fire, do not install the air conditioner where
flammable gas may leak from.
If the gas leaks out and stays around the air conditioner, a
fire may break out.
■ Ceiling-floor type
Air Outlet Horizontal Louver
Air Intake
(Intake room air)
Air Filter
(Filters dust)
■ One-way cassette type
Air Out Horizontal Louver
(Adjust air-out direction)
Fig.2-1
Fig.2-2
Children and the elderly should not operate the unit.
The figures show in this manual are for reference only, and the
actual product may be different.
Fig.2-3
NOTE
Grounding Screw
(In the control box)
Air intake
(Intake air)
Air filter (placed
inside the air
intake)

Owner’s manual
3
■ Small one-way cassette type ■ Wall-mounted type
Grounding Screw
(In the control box)
Air Out, Air Out Louver
(Adjust the air-out direction)
Air Intake
(Intake room air) Grounding Screw
(In the control box)
Air Intake
(Intakes air)
Air Filter (Filters dust)
(In the air intake opening)
Air Filter
(Filters dust)
Air Outlet Horizontal Louver
(Adjust the air-out directions. )
Fig.2-7
■ Small one-way cassette type
(Second generation 18-36 model)
Fig.2-4
■ Duct/ceiling type
Air Outlet
(Connects the duct)
Grounding Screw
(In the control box)
Air return grille: Induced air, decoration
Dust filter: Filter the dust in the induced air
Grille bolt-lock: Lock the air return grille
Air deflector: Control the blow out
direction of the air
Display panel: Display status information
and receive the remote controller signal
Air Filter
(Filters dust)
Air Intake
(Intake room air)
Lock Buckle
(Closes the air
intake grille)
Fig.2-8
Fig.2-5
■ High static pressure duct type
Air Outlet
(Expels room air)
Heat Exchanger
(Exchanges cool air into warm air
Wire cable inlet: Intake of the power and
communication wires
Electronic control box: The control
component of the air-conditioner
Air return port: Induced the indoor air
Water plug for maintenance: Water level
sensor for water drainage and checking
Electric control box
Air Intake
(Intakes room air)
under maintenance
Air outlet: Blow out the cool and heat air flow
One refrigerant system Fig.2-9
Fig.2-6

Owner’s manual
4
Air Intake
(Intakes room air)
Air Outlet
(Expels
room air)
■ Middle static pressure duct type
Air Intake
(Intakes room air)
Electric control box
Electric control box B Electric control box A
Two refrigerant system Fig.2-10 Air Outlet
(Expels room)
■ (Thin) Duct/ceiling type
Heat Exchanger
(Exchanges cool air into warm air)
■ Low static pressure type
Fig.2-13
Air Outlet
(Outlet room air)
Heat Exchanger
(Exchange cool air into warm air)
Air Intake
(Intake room air here)
Fig.2-11
Indoor unit
Air Outlet
(Connects the duct)
Control Box
Air Intake
(Intakes room air)
Air Filter
(Filters dust)
Grounding Screw
(In the control box)
Fig.2-14
Connecting pipe
Low-pressure pipe
Outlet pipe
■ Console type
Hi-pressure pipe Inlet pipe
Throttle part
Electric control box
Fig.2-12
Air flow louver
(at air outlet)
Air inlet (with
air filter in it)
Air flow louver
(at air outlet)
Installation part
Display panel
Drain pipe
Fig.2-15

Owner’s manual
5
■ Floor standing type
● Version I
Vertical unit with casing. The air intake is on the front and
the air outlet on top for installing on a wall or with feet on the
floor.
■ Two-way cassette type
Air Intake
(Intakes room air)
Air out, air out louver
(Adjust the air-out direction)
Inhalation grating
Air Intake
Electric control box
Air Filter
Air Return Outlet Cover
(Intakes room air)
Fig.2-16
(Filters dust) (Adjustable)
Fig.2-19
● Version II
Vertical unit with casing. The air intake is on the front and the
air outlet on top for installing on a wall or with feet on the floor.
Air out, air out louver
(Adjust the air-out direction)
3. AIR+CONDITIONER+OPERATIONS+AND+
PERFORMANCE +
Use the system in the following temperature range. The
max temperature for the air conditioner. (Cooling/Heating)
Table 3-1
Air intake
(Intake room air here)
Air filter
Feet (Lift up the
air conditioner)
(Filter the dust in the air)
Fig.2-17
● Version III
The vertical unit is concealed in the wall after installation, with
air intake from the bottom and air delivery at the top.
NOTE
Air outlet
(Expels room air)
1 Using the unit outside of the accepted range may affect how it
runs.
2 Please close doors and windows if outside is humid to prevent
condensation from forming on the unit.
3 The unit performs best in this temperature range.
Electric control box
Air intake
(Intakes room air)
4 The protection system is activated if abnormal conditions
apply.
Air filter
(Filters dust)
Fig.2-18
17°C ~ 32°C
Temperature
Mode
Indoor
temperature
Cooling operation
Indoor Humidity Below 80%.
Condensation will form on the
surface with 80% humidity or above.
Heating operating
(cooling only type without)
≤27°C

Owner’s manual
6
Please note the following correct operation for saving
energy and achieve the quick and comfortable
cooling/heating effect.
● If the air filter is blocked, the cooling/heating effect is diminished.
4. ADJUSTING+AIR+FLOW+DIRECTION. +
Because cold air flows down and hot air flows up, you can
improve the cooling or heating and dispersal effect by adjusting
the air flow louver direction.
1 The heating operation with horizontal air outlet increases the
difference of the room temperature.
● Close the door/window
Do not let hot or cool air leak from the doors and windows.
2 The louver direction:
Choose horizontal outlet mode for cooling. Note the downward
air flow will cause condensation on the air outlet and louver
surface.
■ Four-way cassette type
● Cooling operation
Adjust the louver horizontally.
● Do not overcool or overheat.
Avoid excessive exposure to cold air as it is not healthy.
This applies especially to children, the elderly, and those
with disabilities.
● Heating operation
Adjust the louver down.
Fig.4-1
Fig.4-2
● To maintain a comfortable temperature.
Adjust the air-out direction using the air-out louver.
When using the panel with the auto louver, press SWING for the
auto louver to swing automatically and achieve the best cooling
(heating) effect.
■ One-way cassette type
■ Adjust the air direction up and down
● Auto-swing
Press SWING for the louver to swing up and down.
Maximum air
circulation area
Fig.4-3
NOTE
Close doors and windows.
check
regularly
Do not set
the temperature
too low

Owner’s manual
7
● When cooling
Adjust the louver horizontally.
■ Adjust left and right
vertical louver
Fig.4-4
● When heating
Adjust the louver down(vertically).
Fig.4-8
Fig.4-5
■ Adjust the air direction left and right
Adjust the blade inside the air outlet louver to the required
direction.
When the air flow sideways and the air flow parts must be
used (sold separately), please refer to the following figures
to adjust the air flow direction.
When adjusting air flow left/right, refer to the following figures to
turn the vertical louver to certain angles. Avoid angles that are
too steep or water will drip from the unit.
■ Adjust the air flow up and down
● Cooling operation
Adjust the louver horizontally.
The louver is horizontal
● When heating
Adjust the louver down(vertically).
Fig.4-6
Fig.4-7
■ Duct-ceiling type
The following section explains how to adjust the direction of air
flow direction when the air outlet parts (sold separately) is used
with the indoor unit.
● When cooling
To cool the bottom of the room, set the louver downwards. (Fig.4-9)
● When heating
To heat the bottom of the room, set the louver downwards.
(Fig.4-10)
1 Adjust the horizontal louver down when the air flow is down.
Horizontal louver
Fig.4-9
Fig.4-10
2 The slant angle of horizontal louver must be less than 40°
or water will drip from the unit.
Less than 40°
NOTE
NOTE

Owner’s manual
8
■ Wall-Mounted type
Adjust the Air Flow Direction Up and Down
● Auto-swing
Press SWING for the louver will swing up and down
automatically.
● Manual swing
Adjust the louver to improve the cooling or heating effect.
● When cooling
Adjust the louver horizontally.
● Manual swing
Fig.4-11
Fig.4-15
Adjust the louver to improve the cooling or heating effect.
● When cooling
Adjust the louver horizontally.
Fig.4-12
● When heating
Adjust the louver downwards (vertically).
Fig.4-16
● When heating
Adjust the louver downwards (vertically).
Fig.4-13
■ Console type
■ Adjust the air direction up and down
● Auto-swing
Press SWING for the louver will swing up and down
automatically.
● Manual swing
Press Air Direction to fix the louver at the desired angle.
The louver swing will move up or down with each press.
1 Water may drip from the surface of the unit or horizontal louver
when cooling if the expel-air direction is vertically down.
2 The indoor temperature will not be even in heating mode
when the air-out direction is horizontal.
3 Do not move the horizontal louver with hands or a malfunction
may occur. Adjust it with the swing button on the wire controller.
■ Ceiling-floor type
● Auto-swing
Press SWING for the louver to swing up and down (left
and right) automatically.
Fig.4-17
Fig.4-14
CAUTION

Owner’s manual
9
● When cooling
Adjust the louver horizontally. (Refer to Fig.4-
18)
Table 4-1
● When heating
Adjust the louver downwards (vertically).(Refer to Fig.4-19)
Fig.4-18 Fig.4-19
Do not adjust the horizontal louver by hand.
When adjusting by hand, the mechanism may not operate
properly or condensation may drip from the air outlets.
Air is blown via the upper air outlet so it doesn’t directly
blow onto people in Dry mode.
When setting the air outlet selection switch to .
In all modes, air is expelled from the upper air outlet.
Use this switch if you do not want air coming out of the
lower air outlet (when sleeping etc).
■ Adjust the air direction left and right
To change the air direction to the left or right, adjust
the left and right louvers to appropriate positions.
Fig.4-20
To switch between the Auto and Manual mode on the lower air
outlet, turn off and restart the unit for mode renewing.
■ Digital scroll floor standing type
Adjust the louver to improve the cooling or heating effect.
■ Air flow selection
Open the front panel.
How to open the front panel:(Refer to Fig.5-4).
■ Two-way cassette type Fig.4-21
Before opening the front panel, turn the machine off and
turn the breaker to OFF.
Do not touch the metal parts on the inside of the indoor
unit, as it may cause injury.
Select the air flow as desired. (Please refer to Fig. 7-2
for the positions)
When setting the air flow selection switch to .
Air conditioner automatically decides the appropriate
blowing pattern depending on the operating mode/
situation.
● Auto-swing
Press SWING for the louver to swing up and down automatically.
Fig.4-22
CAUTION
CAUTION
CAUTION
Operating
mode
COOL mode
HEAT mode
Situation
When the room
is cool or after
running the air
conditioner for
one hour.
At the start
of the
operation or
other times
when the
room is not
fully cooled.
At times except those below.
(Normal time.)
At the start or
when air
temperature is
low.
Blowing
pattern
Air is blown via
the upper air
outlet to equalize
the room
temperature and
so the air doesn’t
directly blow onto
people.
Air is blown from the
upper and lower air
outlets for
high-speed cooling
in cooling mode and
for warming the air
in heating mode.
Air is blown via
the upper air
outlet so it
doesn’t directly
blow onto
people.

Owner’s manual
10
● Manual swing
Adjust the louver to improve cooling or heating.
● When cooling
Adjust the louver horizontally.
● When heating
Adjust the louver downwards (vertically).
Fig.4-23
Fig.4-24
■ Method for cleaning the air filter
● The air filter can prevent the dust or other particles from
entering the unit. If the filter is blocked, the unit will not work
very well. Clean the filter every two weeks when you use it
regularly.
● If the air conditioner is positioned in a dusty place, clean the
filter more often.
● Replace the filter if it is too dusty too clean (the replaceable
air filter is an optional fitting).
1. Take out the air-in grill
● For Four- Way Cassette Type
Push the grill switches towards the middle simultaneously as
indicated in Fig.5-1. Then pull down the air-in grill. Take out the
air-in grill (together with the air filter, as shown in Fig.5-2). Pull
the air-in grill down to 45°, and lift it up to remove the grill.
Do not try to adjust the louver by hand.
When adjusting it by hand, the mechanism may not work properly
or condensation may drip from air outlets.
5. MAINTENANCE +
+
!
CAUTION
Fig.5-1
1 Before you clean the air conditioner, ensure it is
powered off.
2 Check that the wiring is undamaged and connected.
3 Use a dry cloth to wipe the indoor unit and remote
controller.
4 A wet cloth may be used to clean the indoor unit if it is
very dirty.
5 Never use a damp cloth on the remote controller.
Fig.5-2
6 Do not use a chemically-treated duster on the unit or
leave this type of material to the unit to avoid
damaging the finish. CAUTION
7 Do not use benzene, thinner, polishing powder, or
similar solvents for cleaning.
These may cause the plastic surface to crack or warp.
The control box cables originally connected to the electrical
terminators on the main body must be removed, as indicated
above.
CAUTION

Owner’s manual
11
● For Duct/Celling Type
Push the grill switches in the directions of the arrows. Then,
open the air-in grill downwards. Turn the air filter fixing block
backwards, and remove the air-in grill.
● For One-Way Cassette Type
Remove the air-in grille, hold the air-in buckle with two hands and
open the grille downwards, pull it to the inside, and push the filter
buckle to remove the grille.
Air filter
Hold the tabs of the frame, and remove the claws in the four
places. (The special function filter can be maintained by washing
it with water once every six months. We recommend replacing it
once every three years.)
● For One-Way Cassette Type
(The second generation 18-36 model)
Fig.5-3
Special function filter
Fig.5-8
Fig.5-4
Fig.5-5
● For Console Type
Push the grill switches in the directions of the arrows. Then,
open the air-in grill downwards. Press the claws on the right and
left of the air filter down slightly, then pull upwards.
● For digital scroll floor standing type
The filter is housed in the lower part of the unit in versions II and
III to take in air from below or from the rear, to remove the filter
in versions II and III, do as follows.
Fig.5-9
It is housed in the front cowl in version I to take in air from the
front.
To remove the filter in version I, do as follows.
Fig.5-10
■ Two-way cassette type
Air Outlet
Selection Switch
Fig.5-6
■ Take off the inhalation grating from the panel.
1) Upright row (non-directional) one side of the inhalation
grating, and putdown the other side, and then slide follow the
arrow’s direction refers to Fig.5-9
2) Loosen the hanger of the putdown side refers to Fig.5-10
3) Open the inhalation grating (about 45°), and remove the
other side, refers to Fig.5-11
Fig.5-7

Owner’s manual
12
Inhalation grating
Fig.5-11
Fig.5-12
Fig.5-15
Fig.5-16
CAUTION
Fig.5-13
■ According to the figure shown in the position and
direction of the arrow, press the filter and take it down. In
the same way, take down the filter on the other side, and
put it back after cleaning.
1 Do not dry out the air filter under direct sunshine or with fire.
2 For the one-way cassette type, the air filter should be installed
before the unit body.
Air Intake
(Intakes air)
4.Re-install the air filter.
5.Install and close the air-in grill by reversing step 1 and 2,
and connect the control box cables to the corresponding
terminators of the main body.
Air Filter
(Filters dust)
2. Dismantle the air filter.
3. Clean the air filter
Inhalation grating
Air Out Louver
(Adjustable)
Fig.5-14
Maintenance before stopping using the
unit for a long time
(e.g., at the end of a season)
Let the indoor units run in fan only operation for about half a
day to dry the interior of the unit.
Clean the air filter and indoor unit casing.
Refer to “Cleaning the air filter" for details on how to proceed,
and make sure you install cleaned air filters back in the same
position.
The air filter blocks dust. If the filter is blocked, the air
conditioner will not work as well.
Clean the filter every two weeks when you use the unit is in
regular use.
Clean the air filter with a vacuum cleaner or water.
a. The air-in side should face up when using a vacuum cleaner.
(Refer to Fig.5-13)
b. The air-in side should face down when using clean water.
(Refer to Fig.5-14)
For excessive dust, use a soft brush and natural detergent to
clean it and dry in the cool place.
Turn off the unit with the ON/OFF button on the remote
controller, and then unplug it.
When the power switch is connected, some energy will be
consumed, even if the unit is not in operation. So please
disconnect the power to save the energy.
A degree of dirt will be after several rounds of use so maintain
carefully.
Take out of the batteries from the remove controller.
NOTE

Owner’s manual
13
Maintenance after a long period of non-use.
(e.g., at the beginning of the season)
Check and remove everything that might be blocking the
inlet and outlet vents of indoor units and outdoor units.
Clean air filters and casings of indoor units.
Refer to "Cleaning the air filter" section for details on how
to proceed and make sure you reinstall the cleaned air
filters in the same position.
Turn on the power at least 12 hours before you want to use
the unit to ensure it works properly. As soon as the power is
turned on, the remote controller displays appear.
Digital scroll central air conditioning
auxiliary heating equipment
In winter, purchase the indoor unit with auxiliary heating to
enlarge the capacity.
When turning to the heat mode the air conditioner with
auxiliary heating will run at the set term.
Do not install the 4-way cassette type and duct/ceiling type
(with auxiliary heating).
6. POTENTIAL+PROBLEMS +
+
Symptom 1: The system does not work
Symptom 3: White mist is expelled from the unit
Symptom 3.1: Indoor unit
When humidity is high during the cooling operation. If the interior
of the indoor unit is extremely contaminated, the temperature
distribution inside a room becomes uneven. It is necessary to
clean the interior of the indoor unit. Ask your dealer for details on
cleaning the unit, because a technician is required.
Symptom 3.2: Indoor unit, outdoor unit
When the system is changed over to the heating operation after
defrost operation. Moisture generated by defrost becomes steam
and is exhausted.
Symptom 4: The air conditioner is noisy in
cooling mode
Symptom 4.1: Indoor unit
A continuous sound is heard when the system is in cooling mode
or has stopped.
The drain pump (optional accessory) makes this sound.
A squeaking sound is heard when the system stops after heating
operation.
The expansion and contraction of plastic parts caused by
temperature change make this noise.
Symptom 4.2: Indoor unit, outdoor unit
The air conditioner does not start immediately after pressing the
ON/OFF button on the remote controller.
If the operation lamp lights, the system is in normal condition. To
prevent the compressor motor from overloading, the air
conditioner starts three minutes after it is turned on.
Heating mode is running when the following lights are on:
operation and the "PRE-DEF indicator (cooling and heating type)
or the fan only indicator (cooling only type)". When it starts but
the compressor does not, the indoor unit activates protective
measures because of the outlet temperature.
Symptom 2: Running fan mode during cooling
mode
To prevent the indoor evaporator frosting, the system will
change into fan mode automatically before resuming cooling
mode.
When the room temperature drops to the set temperature, the
compressor goes off and the indoor unit changes to fan mode.
When the temperature increases, the compressor starts again.
It is same as in heating mode.
A continuous low hissing sound is heard when the system is in
operation.
This is the sound of refrigerant gas flowing through both indoor
and outdoor units.
A hissing sound which is heard at the start or immediately after
stopping or defrosting.
This is the noise of refrigerant caused by a flow stop or flow
change.
Symptom 4.3: Outdoor unit
The running noise may change due to a change in frequency.
Symptom 5: Dust comes out of the unit
When the unit is used for the first time in a long time.
This is because dust has gotten into the unit.
Symptom 6: The unit gives off a strange odor
The unit can absorb the smell of rooms, furniture, and cigarette
smoke, and then emit it.
Symptom 7: The outdoor unit fan does not
spin.
During operation. The speed of the fan is controlled to optimize
how the product runs.

Owner’s manual
14
7. TROUBLESHOOTING +
+
7.1 Troubles and causes of air conditioner
If one of the following faults occur, power the unit off and contact your dealer.
The remote controller receives malfunction or the button does not work well.
A safety device such as a circuit breaker frequently trips.
Obstacles and water enter the unit.
Water is leaking from the indoor unit.
Other malfunctions.
If the system does not run properly due to a reason other than those mentioned above, check the
system as follows. (See in Table 7-1)
Table 7-1
Symptoms
Causes
Solution
Unit does not start
Power failure.
Power switch is off.
The power switch fuse may have burned
out
The remote controller’s batteries are dead.
Wait for the power to resume.
Switch on the power.
Replace the fuse.
Replace the batteries or check the
controller.
Air flows normally but
doesn’t cool
Temperature is not set correctly.
The three-minute compressor for
protection is activated
Set the temperature properly.
Wait.
Unit starts or stops
frequently
There is too much or too little
refrigerant.
There is no gas in the refrigerating
circuit.
Compressor is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Check leakage, and rightly recharge the
refrigerant.
Vacuum and recharge the refrigerant.
Maintenance or the change compressor.
Install manostat.
Find reasons and the solution.
Low cooling effect
The outdoor unit and indoor unit of the
heat exchanger are dirty.
The air filter is dirty.
Inlet/outlet of the indoor/outdoor unit is
blocked.
Doors and windows are open.
Sunlight is directly shining on the unit.
Too much heat resource.
Outdoor temp. is too high.
Leakage of refrigerant or lack of
refrigerant.
Clean the heat exchanger.
Clean the air filter.
Eliminate all dirt and to make the air
flow smoothly.
Close doors and windows.
Install curtains to provide shelter from
the sun.
Reduce heat sources.
AC cooling capacity reduces (normal).
Check leakage and add refrigerant.
Low heating effect
Outdoor temperature is lower than 7°C.
Doors and windows are not completely
closed.
Refrigerant is leaking or there’s not
enough.
Use a heating device.
Close doors and windows.
Check leakage and add refrigerant.

Owner’s manual
15
7.2 Troubles and causes of remote controller
Before asking for service or repairs, check the following points. (See in Table 7-2)
Table 7-2
Symptoms
Causes
Solution
The fan speed cannot be
adjusted.
Check whether the MODE
indicated on the display is
"AUTO"
In automatic mode, the air conditioner
will automatically change the fan
speed.
Check whether the MODE
indicated on the display is
"DRY"
When dry operation is selected, the air
conditioner automatically adjusts the
fan speed. The fan speed can be
selected during "COOL", "FAN ONLY",
and "HEAT".
The remote controller signal
is not transmitted even when
the ON/OFF button is pushed.
Check whether the batteries
in the remote controller are
exhausted.
The power supply is off.
The TEMP. indicator does
not come on.
Check whether the MODE
indicated on the display is
FAN ONLY
The temperature cannot be set during
FAN mode.
The indication on the display
disappears after a certain time.
Check whether the timer
operation has come to an
end when the TIMER OFF
is indicated on the display.
The air conditioner operation will
stop up to the set time.
The TIMER ON indicator goes
off after a certain time.
Check whether the timer
operation is started when
the TIMER ON is indicated
on the display.
Up to the set time, the air conditioner
will automatically start and the
appropriate indicator will go off.
No receiving tone sounds
from the indoor unit when
the ON/OFF button is pressed.
Check whether the signal
transmitter of the remote
controller is properly directed
to the infrared signal receiver
of the indoor unit when the
ON/OFF button is pressed.
Directly transmit the signal transmitter
of the remote controller to the infrared
signal receiver of the indoor unit, and
then press the ON/OFF button twice.
7.3 Fault information and codes
Fault information is only available for indoor units with a panel, and only the panel with digit displays shows the
fault code, otherwise just four LED lamps. The LED and digit display the following faults.

Owner’s manual
16
Table.7-3 The fault indication of LED Table.7-4 The fault Indication Of Digit Displays
NO.
Type
Contents
LED flash
Remarks
1
Malfun-
ction
The evaporator
sensor check
point is abnomal
or room temp.
sensor is
abnormal.
The run LED
flashes fast
After the fault ends,
the unit resumes
automatically.
2
Malfun-
ction
Indoor/outdoor unit
communication
is abnormal
The timer LED
flashes fast
After the fault ends,
the unit resumes
automatically.
3
Malfun-
ction
Outdoor unit
is abnormal
The alarm LED
flashes slowly
After the fault ends,
the unit resumes
automatically.
4
Malfun-
ction
The water level
switch is abnormal
The alarm LED
flashes fast
After the fault ends,
the unit resumes
automatically.
5
Alarm
Mode conflict
The defrost LED
flashes fast
When the indoor unit
enters heating mode
or is turned off, the
alarm will turn off.
6
Alarm
M_Home
mismatching
4 LED flash
together
When the indoor unit is
replaced with the correct
one or is turned off, the
alarm will disappear.
7
Malfun-
ction
EEPROM error
Defrost LED flash
slowly
After the fault ends,
the unit resumes
automatically.
8
Alarm
No address
when powered
on the first time
Timer LED and
run LED flash
together
After the fault ends,
the unit resumes
automatically.
NO.
Type
Contents
Display content
Remarks
1
Malfun-
ction
Room temp.
sensor is
abnormal.
E2
After the malfunctions
disappear, it restores
automatically.
2
Malfun-
ction
Indoor/outdoor unit
communication
is abnormal
E1
After the malfunctions
disappear, it restores
automatically.
3
Malfun-
ction
Outdoor unit
is abnormal
Ed
After the malfunctions
disappear, it restores
automatically.
4
Malfun-
ction
Water level switch
is abnormal
EE
After the malfunctions
disappear, it restores
automatically.
5
Alarm
Mode conflict
E0
When the indoor unit
turns to heating mode
or is turned off, the
alarm will disappear.
6
Alarm
M_Home
mismatch
H0
When the indoor unit is
replaced with a correct
one or is turned off, the
alarm will turn off
7
Malfun-
ction
EEPROM error
E7
After the malfunctions
disappear, it restores
automatically.
8
Alarm
No address when
powered on for
the first time
FE
After the malfunctions
disappear, it restores
automatically.
9
Malfun-
ction
The evaporator
temp. sensor is
abnormal.
E3
After the malfunctions
disappear, it restores
automatically.
10
Malfun-
ction
The evaporator
outlet temp.
sensor is
abnormal.
E4
After the malfunctions
disappear, it restores
automatically.

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