Kaysun KCI-35 DR12 User manual

IMPORTANT NOTE:
Read this manual carefully before installing or operating your new air conditioning
unit. Make sure to save this manual for future reference.
OWNER'S MANUAL
Compact Four Way Cassette
KCI-35 DR12 KCI-52 DR12

Table of Contents
Page
0. Safety Precautions ........................................................................................ 4
1. Indoor Unit Parts and Major Functions ....................................................... 6
2. Manual Operations....................................................................................... 8
3. Care and Maintenance ................................................................................. 9
a. Unit Maintenance
b. How to Clean the Air Filter
c. Repairing Refrigerant Leaks
d. Preparation for Periods of Non-use
4. Troubleshooting............................................................................................ 11
a. Common Problems
b. Troubleshooting Tips
c. Error Codes
5. European Disposal Guidelines ..................................................................... 15
Caution: Risk of fire /
flammable materials

Page 4 
Thank you for purchasing this air conditioner. This manual will provide you with information on how to operate, maintain,
and troubleshoot your air conditioner. Following the instructions will ensure the proper function and extended lifespan of
your unit.
Please pay attention to the following signs:
Failure to observe a warning may result in serious injuries. The appliance must be installed in
accordance with national regulations.
Failure to observe a caution may result in injury or equipment damage.
WARNING
CAUTION
WARNING
• Ask an authorized dealer to install this air conditioner.
Inappropiate installation may cause water leakage,
electric shock, or fire.
• The warranty will be voided if the unit is not installed
by professionals.
• If abnormal situation arises (like burning smell), turn off
the power supply and call your dealer for instructions to
avoid electric shock, fire or injury.
• Do not let the indoor unit or the remote control get
wet. It may cause electric shock or fire.
• 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 use means to accelerate the defrosting process
to clean, other than those recommended by the
manufacturer.
• The appliance shall be stored in a room without
continuously operating ignition sources (for example:
open flames, an operating gas appliance or an operating
electric heater.
• The appliance shall be stored to prevent mechanical
damage from occurring.
• Be aware that the refrigerants may not contain an odor.
0. Safety Precautions
• Compliance with national gas regulations shall be
observed.
• Keep ventilation openings clear of obstruction.
• Do not pierce or burn.
• A warning that the appliance shall be stored in a well-
ventilated area where the room size corresponds to the
room area as specified for operation.
• Any person who is involved with working on or
breaking into a refrigerant circuit should hold a current
valid certificate from industry-accredited assessment
authority, which authorizes their competence to handle
refrigerants safely in accordance with an industry
recognized assessment specification.
• Servicing shall only be performed as recommended by
the equipment manufacturer. Maintenance and repair
requiring the assistance of other skilled personnel shall
be carried out under the supervision of the person
competent in the use of flammable refrigerants.

Page 5 
CAUTION
• Do not touch the air outlet while the swing flap is in
motion. Fingers might get caught or the unit may break
down.
• Do not inspect the unit by yourself. Ask an authorized
dealer to perform the inspection.
• To prevent product deterioration, do not use the air
conditioner for preservation purposes (storage of food,
plants, animals, works of art, etc.).
• Do not touch the evaporator coils inside the indoor
unit. The evaporator coils are sharp and may cause
injury.
• Do not operate the air conditioner with wet hands. It
may cause electric shock.
• Do not place items that might be affected by moisture
damage under the indoor unit. Condensation can occur
at a relative humidity of 80%.
• Do not expose heat-producing appliances to cold air
or place them under the indoor unit. This may cause
incomplete combustion or deformation of the unit due
to the heat.
• After long periods of usage, check the indoor unit to see
if anything is damaged. If the indoor unit is damaged, it
may fall and cause injury.
• If the air conditioner is used together with other heating
devices, thoroughly ventilate the room to avoid oxygen
deficiency.
• Do not climb onto or place objects on top of the
outdoor unit.
• Do not operate the air conditioner when using fumigant
insecticides. The chemicals may become layered with
the unit and endanger those who are hypersensitive to
chemicals.
• Do not let children play with the air conditioner.
• Do not operate the air conditioner in a wet room (e.g.
bathroom or laundry room). This can cause electrical
shock and cause the product to deteriorate.
• This appliance can be used by children aged from 8
years and above and people 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. Cleaning
and user maintenance shall not be made by children
without supervision.

Air inlet
Air outlet
Louver
Display panel
Page 6 
1. Indoor Unit Parts and Major Functions
Unit Parts
Fig. 1.1
Operating Conditions
Use the system under the following temperatures for safe and effective operation. If the air conditioner is used under
different conditions, it may malfucntion or become less efficient.
COOL Mode HEAT Mode DRY Mode
Indoor Temperature 17°C - 32°C
(62°F - 90°F)
0°C - 30°C
(32°F - 86°F)
17°C - 32°C
(62°F - 90°F)
Outdoor Temperature
0°C - 50°C
(32°F - 122°F)
-15°C - 24°C
(5°F - 76°F)
0°C - 50°C
(32°F - 122°F)
-15°C - 50°C
(5°F - 122°F)
(low temperature
cooling models)

Closing curtains during heating also helps
keep the heat in
Doors and windows should be kept closed
Page 7 
Features
• Default Setting
When the air conditioner restarts after a power failure,
it will default to the factory settings (AUTO mode,
AUTO fan, 24ºC (76ºF)). This may cause inconsistencies
on the remote control and unit panel. Use your remote
control to update the status.
• Auto-Restart (some models)
In case of power failure, the system will immediately
stop. When power returns, the Operation light on the
indoor unit will flash. To restart the unit, press the ON/
OFF button on the remote control. If the system has
an auto restart function, the unit will restart using the
same settings.
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.
• Louver Angle Memory Function (optional)
Some models are designed with a louver angle memory
function. When the unit restarts after a power failure, the
angle of the horizontal louvers will automatically return
to the previous position. The angle of the horizontal
louver should not be set too small as condensation may
form and drip into the machine. To reset the louver,
press the manual button, which will reset the horizontal
louver settings.
• Refrigerant Leak Detection System (some
models)
In the event of a refrigerant leak, the LCD screen will
display "EC" and the LED indicator light will flash.

Manual button
LED display
Operation indicator
Infrared receiver
Timer indicator Alarm indicator
PRE-DEF
(pre-heating/defrost)
indicator
Fig. 2.1
Fig. 2.2
Page 8 
2. Manual Operations
This display panel on the indoor unit can be used to operate the unit in case the remote control has been misplaced or is
out of batteries.
• MANUAL button: This button selects the mode in the following order: AUTO, FORCED COOL, OFF.
• FORCED COOL mode: In FORCED COOL mode, the Operation light flashes. The system will then turn to AUTO after
it has cooled with a high wind speed for 30 minutes. The remote control will be disabled during this operation.
• OFF mode: When the panel is turned OFF, the unit turns off and the remote control is re-enabled.

Fig. 3.1
Press tabs to
release grille
Fig. 3.2
Page 9 
3. Care and Maintenance
Safety Precautions
• Contact an authorized service technician for repair or
maintenance. Improper repair and maintenance may
cause water leakage, electrical shock, or fire, and may
void your warranty.
• Do not substitute a blown fuse with a higher or lower
amperage rating fuse, as this may cause circuit damage
or an electrical fire.
• Make sure the drain hose is set up according to the
instructions. Failure to do so could cause leakage and
result in personal property damage, fire and electric
shock.
• Make sure that all wires are connected properly. Failure
to connect wires according to instructions can result in
electrical shock or fire.
Unit Maintenance
BEFORE CLEANING OR MAINTENANCE
• Always turn off your air conditioning system and
disconnect the power supply before cleaning or
maintenance.
• Do not use chemicals or chemically treated cloths to
clean the unit.
• Do not use benzene, paint thinner, polishing powder
or other solvents to clean the unit. They can cause the
plastic surface to crack or deform.
• Do not wash the unit under running water. Doing so
creates an electrical hazard.
• Do not use water hotter than 40ºC (104ºF) to clean
the front panel. This can cause the panel to become
deformed or discolored.
• Clean the unit using a damp, lint-free cloth and neutral
detergent. Dry the unit with a dry, lint-free cloth.
How To Clean The Air Filter
The filter prevents dust and other particles from entering
the indoor unit. Dust buildup can reduce the efficency of
the air conditioner. For optimum efficiency, clean the air
filter every two weeks or more frequently if you live in a
dusty area. Replace the filter with a new one if it's heavily
clogged and cannot be cleaned.
WARNING: DO NOT REMOVE OR CLEAN
THE FILTER BY YOURSELF
Removing and cleaning the filter can be dangerous.
Removal and maintenance must be performed by a certified
technician.
NOTE: In households with animals, you will have to
periodically wipe down the grille to prevent animals hair
blocking air flow.
1. Unlock the grille by pushing the two tabs towards the
middle simultaneously.
2. Unplug the display panel cable fomr the control box on
the main body.
3. Detach the grille from the main unit by holding the
grille at a 45º angle, lifting it up slightly and then pulling
the grille forward.

Fig. 3.3
Fig. 3.4
Page 10 
4. Remove the air filter.
5. Clean the air filter by vacuuming the surface or washing
in warm water with mild detergent.
A. If using a vacuum cleaner, the inlet side should face
the vacuum.
Repairing Refrigerant Leaks
WARNING
• If the refrigerant leaks, turn off the air conditioner and
any combustible heating devices, ventilate the room
and call your dealer immediately. Refrigerant is both
toxic and flammable. Do not use the air conditioner
until the leak is repaired.
• When the air conditioner is installed in a small room,
measures must be taken to prevent the refrigerant
concentration from exceeding the safety limit in the
event of refrigerant leakage. Concentrated refrigerant
causes a severe health and safety threat.
Refrigerant Leak Detection System (some models)
In the event of a refrigerant leak, the LCD screen will display
"EC" and the LED indicator light will flash.
Preparation For Periods Of Non-Use
Maintenance after Extended Non-Use
1. Remove any obstacles blocking the vents of both the
indoor and outdoor units.
2. Clean the air filter and the front grille of the indoor unit.
Reinstall the clean, dry air filter in its original position.
3. Turn on the main power switch at least 12 hours prior
to operating the unit.
Storing the Unit While Not in Use
1. Run the appliance on FAN mode for 12 hours in a warm
room to dry it and prevent mold.
2. Turn off the appliance and unplug it.
3. Clean the air filter according to the instructions in the
previous section. Reinstall the clean, dry filter before
storing.
4. Remove the batteries from the remote control.
B. If using water, the inlet side should face down and
away from the water stream.
6. Rinse the filter with clean water and allow it to air-dry.
Do not let the filter dry in direct sunlight.
7. Reinstall the filter.
8. Reinstall the front grille and reconnect the display panel
cable to the control box on the main body

Page 11 
4. Troubleshooting
CAUTION
If one of the following conditions occurs, switch off the power supply immediately and contact your dealer for further
assistance.
• The operation light continues to flash rapidly after the unit has been restarted.
• The remote-control buttons do not work.
• The unit continually trips fuses or circuit breakers.
• A foreign object or water enters the air conditioner.
• Other abnormal situations
Common Issues
The following problems are not a malfunction and, in most situations, will not require repairs.
Issue Possible Causes
Unit does not turn on
when pressing ON/OFF
button
The unit has a 3-minute protection feature that prevents the unit from overloading. The
unit cannot be restarted within three minutes of being turned off
Cooling and Heating Models: If the Operation light and PRE-DEF (Pre-heating/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 from
COOL mode to FAN
mode
The unit changes its setting to prevent frost from forming on the unit. Once the temperature
increases, the unit will start operating again.
The set temperature has been reached, at which point the unit turns off the compressor.
The unit will continue operating when the temperature fluctuates again.
The indoor unit emits
white mist
In humid regions, a large temperature difference between the room's air and the
conditioned air can cause white mist.
Both the indoor and
outdoor units emit
white mist
When the unit restarts in HEAT mode after defrosting, white mist may be emitted due to
moisture generated from the defrosting process.
The indoor unit makes
noises
A squeaking sound is heard when the system is OFF or in COOL mode. The noise is also
heard when the drain pump (optional) is in operation.
A squeaking sound may occur after running the unit in HEAT mode due to expansion and
contraction of the unit's plastic parts.
Both the indoor unit
and outdoor unit make
noises
A low hissing sound may occur during operation. Thia ia normal and is caused by refrigerant
gas flowing through both indoor and outdoor units.
A low hissing sound may be heard when the system starts, has just stopped running or is
defrosting. This noise is normal and is caused by the refrigerant gas stopping or changing
direction.

Page 12 
Issue Possible Causes
The outdoor unit makes
noises The unit will make different sounds based on its current operating mode.
Dust is emitted from
either the indoor or
outdoor unit
The unit may accumulate dust during extended periods of non-use, which will be emitted
when the unit is turned on.
This can be mitigated by covering the unit during long periods of inactivity.
The unit emits a bad
odour
The unit may absorb odours from the environment (such as furniture, cooking, cigarettes,
etc.) which will be emitted during operations.
The unit's filters have become moldy and should be cleaned.
The fan of the outdoor
unit does not operate During operation, the fan speed is controlled to optimize product operation.

Page 13 
Troubleshooting Tips
When troubles occur, please check the following points before contacting a repair company.
Problem Possible Causes Solution
The unit is not
working
Power failure Wait for the power to be restored
The power is switch off Turn on the power
The fuse is burned out Replace the fuse
Remote control batteries are dead Replace batteries
The Unit's 3-minute protection has been
activated Wait three minutes after restarting the unit
Poor Cooling
Performance
Temperature setting may be higher than
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
The air inlet or outlet of either unit is blocked Turn the unit off, remove the obstruction and turn
it back on
Doors and windows are open Make sure that all doors and windows are closed
while operating the unit
Excessive heat is generated by sunlight Close windows and curtains during periods of
high heat or bright sunshine
Low refrigerant due to leak or long-term use Check for leaks, re-seal if necessary and top off
refrigerant
The unit starts and
stops frequently
There's too much or too little refrigerant in
the system
Check for leaks and recharge the system with
refrigerant
There is air, incompressible gas or foreign
material in the refrigeration system Evacuate and recharge the system with refrigerant
System circuit is blocked Determine which circuit is blocked and replace 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
Poor heating
performance
The outdoor temperature is lower than 7ºC
(44.5ºF)
Check for leaks and recharge the system with
refrigerant
Cold air is entering through doors and
windows
Make sure that all doors and windows are closed
during use
Low refrigerant due to leak or long-term use Check for leaks, re-seal if necessary and top off
refrigerant

Page 14 
Error Codes
Number Cause
The number
of flashes per
second
Timer indicator Error
Code
1Indoor EEPROM (Electrically Erasable Programmable
Read-Only Memory) error 1 OFF E0
2Indoor and outdoor unit communication malfunction 2 OFF E1
3Indoor fan speed malfunction 4 OFF E3
4Indoor room temperature sensor error 5 OFF E4
5Evaporator coil temperature sensor error 6 OFF E5
6Refrigerant leak detection system malfunction 7 OFF EC
7Water level alarm malfunction 8 OFF EE
8Dual indoor unit (twin model only) communication
malfunction 9 OFF E8
9Other twin model malfunction 10 OFF E9
10 Overload protection 1 ON F0
11 Outdoor temperature sensor error 2 ON F1
12 Outdoor condenser pipe sensor error 3 ON F2
13 Discharge air temperature sensor error 4 ON F3
14 Outdoor EEPROM (Electrically Erasable Programmable
Read-Only Memory) error 5 ON F4
15 Outdoor fan speed (DC fan motor only) malfunction 6 ON F5
16 Inverter module IPM protection 1 Flash P0
17 High/Low voltage protection 2 Flash P1
18 Compressor top overheating protection 3 Flash P2
19 Outdoor low temperature protection 4 Flash P3
20 Compressor drive error 5 Flash P4
21 Mode conflict 6 Flash P5
22 Compressor low-pressure protection 7 Flash P6
23 Outdoor IGBT sensor error 8 Flash P7

Page 15 
5. European Disposal Guidelines
Users in European Countries may be required to properly dispose of this unit. 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
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.
The design and specifications are subject to change without prior notice for product
improvement. Consult with the sales agency or manufacturer for details
QSBPQ4U-056AEN(R32)(A3))
16122500000349
20170905