SPLIT-TYPE ROOM AIR CONDITIONER
Owner’s Manual
Dream Inverter Series
All Model Numbers
CS78421-548-754
IMPORTANT NOTE:
Read this manual carefully before installing
or operating your new air conditioning
unit. Make sure to save this manual for
future reference.
Table of Contents
Owner’s Manual
0 Safety Precautions.......................................................04
1 Unit Specifications and Features..............................06
SAFETY
FIRST
2 Manual Operation
(Without Remote)................11
3 Care and Maintenance.....................................................12
4 Troubleshooting...................................................................14
5 European Disposal Guidelines....................................18
Safety
Precautions
Safety Precautions
Read Safety Precautions Before 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.
This symbol indicates that ignoring instructions may cause death or serious
injury.
WARNING
This symbol indicates that ignoring instructions may cause moderate injury
to your person, or damage to your appliance or other property.
CAUTION
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.
INSTALLATION WARNINGS
•
Ask an authorized dealer to install this air conditioner. Inappropriate installation may cause water
leakage, electric shock, or fire.
•
All repairs, maintenance and relocation of this unit must be performed by an authorized service
technician. Inappropriate repairs can lead to serious injury or product failure.
WARNINGS FOR PRODUCT USE
•
If an abnormal situation arises (like a burning smell), immediately turn off the unit and pull the
power plug. 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 the air conditioner in a wet room (e.g., bathroom or laundry room). This can
cause electrical shock and cause the product to deteriorate.
•
Do not expose your body directly to cool air for a prolonged period of time.
 Page 4 
Safety
Precautions
ELECTRICAL WARNINGS
•
•
•
•
Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer or certified service agent.
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 use an extension cord, manually extend the power cord, or connect other appliances to
the same outlet as the air conditioner. Poor electrical connections, poor insulation, and insufficient
voltage can cause fire.
CLEANING AND MAINTENANCE WARNINGS
•
•
•
Turn off the device and pull the plug before cleaning. Failure to do so can cause electrical shock.
Do not clean the air conditioner with excessive amounts of water.
Do not clean the air conditioner with combustible cleaning agents. Combustible cleaning agents
can cause fire or deformation.
CAUTION
•
•
•
•
•
•
•
•
If the air conditioner is used together with burners or other heating devices, thoroughly ventilate
the room to avoid oxygen deficiency.
Turn off the air conditioner and unplug the unit 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.
 Page 5 
Unit Parts
Air Filter
(pull out)
Front Panel
Power Cable (Some Units)
Louver
Remote Control
Display window
Remote Holder (Some Units)
“
” for 3 seconds when:
• TIMER ON is set
• FRESH, SWING, TURBO, or SILENCE features are turned on
“
” for 3 seconds when:
• TIMER OFF is set
• FRESH, SWING, TURBO, or SILENCE features are turned off
“
“
” when anti-cold air feature is turned on(cooling & heating units)
“
” when defrosting(cooling & heating units)
“
” when unit is self-cleaning(some units)
“
” when freeze protection is turned on(some units)
“
” when WIFI Control feature is activated(some units)
Display Code
Meanings
” When ECO function(some units) is activated, the
, , illuminates gradually one by one as --- --set temperature-- ...... in one second interval.
In other modes, the unit will display your temperature setting.
In Fan mode, the unit will display the room temperature.
NOTE:
A guide on using the infrared remote is not included
in this literature package.
 Page 6 
Unit
Specifications
and Features
1
Unit Specifications and Features
Achieving Optimal Performance
Unit
Specifications
and Features
Optimal performance for the COOL, HEAT, and DRY modes can be achieved in the following
temperature ranges. When your air conditioner is used outside of these ranges, certain safety
protection features will activate and cause the unit to perform less than optimally.
Inverter Split Type
Room Temperature
COOL mode
HEAT mode
DRY mode
17°C - 32°C
(63°F - 90°F)
0°C - 30°C
(32°F - 86°F)
10°C - 32°C
(50°F - 90°F)
-15°C - 30°C
(5°F - 86°F)
0°C - 50°C
(32°F - 122°F)
0°C - 50°C
(32°F - 122°F)
-15°C - 50°C
(5°F - 122°F)
Outdoor
Temperature
(For models with
low temp. cooling
systems.)
0°C - 60°C
(32°F - 140°F)
0°C - 60°C
(32°F - 140°F)
(For special
tropical models)
(For special
tropical models)
FOR OUTDOOR UNITS
WITH AUXILIARY
ELECTRIC HEATER
When outside
temperature is below 0°C
(32°F ), we strongly
recommend keeping the
unit plugged in at all
time to ensure smooth
ongoing performance.
Fixed-speed Type
COOL mode
Room
Temperature
17°-32°C (63°-90°F)
18°-43°C (64°-109°F)
-7°-43°C (19°-109°F)
Outdoor
Temperature (For models with low-temp cooling systems)
18°-54°C (64°-129°F)
(For special tropical models)
HEAT mode
0°-30°C (32°-86°F)
10°-32°C (50°-90°F)
11°-43°C (52°-109°F)
-7°-24°C (19°-75°F)
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.
 Page 7 
DRY mode
18°-43°C (64°-109°F)
18°-54°C (64°-129°F)
(For special tropical models)
Other Features
• Auto-Restart
If the unit loses power, it will automatically
restart with the prior settings once power has
been restored.
• Anti-mildew (some units)
When turning off the unit from COOL, AUTO
(COOL), or DRY modes, the air conditioner will
continue operate at very low power to dry up
condensed water and prevent mildew growth.
•
Mute Operation (some units)
Press the LED button on the remote control
can turn off the indoor screen display, and
also turn off the air conditioner buzzer,
which create a comfortable and quiet
environment.
• Wi-Fi Control
(some units)
Wi-Fi control allows you to control your air
conditioner using your mobile phone and a
Wi-Fi connection.
• Louver Angle Memory(some units)
When turning on your unit, the louver will
automatically resume its former angle.
• Refrigerant Leakage Detection
(some
units)
The indoor unit will automatically display “EC”
when it detects refrigerant leakage.
For a detailed explanation of your unit’s
advanced functionality (such as TURBO mode
and its self-cleaning functions), refer to the
Remote Control Manual.
NOTE ON ILLUSTRATIONS
Illustrations in this manual are for explanatory purposes. The actual shape of your indoor unit may be
slightly different. The actual shape shall prevail.
 Page 8 
Unit
Specifications
and Features
For a detailed explanation of each function,
refer to the Remote Control Manual.
Unit
Specifications
and Features
• Setting Angle of Air Flow
Setting vertical angle of air flow
While the unit is on, use the SWING/DIRECT
button to set the direction (vertical angle) of
airflow.
1. Press the SWING/DIRECT button once to
activate the louver. Each time you press
the button, it will adjust the louver by 6°.
Press the button until the direction you
prefer is reached.
Ra
2. To make the louver swing up and down
ng
e
Caution: Do not keep louver at too
vertical an angle for long periods of
time. This can cause water condensation
to drip on your furnishings.
continuously, press and hold the SWING/
DIRECT button for 3 seconds. Press it
again to stop the automatic function.
Setting horizontal angle of air flow
The horizontal angle of the airflow must be set
manually. Grip the deflector rod (See Fig.B)
and manually adjust it to your preferred direction.
For some units, the horizontal angle of the airflow
can be set by remote control. please refer to the
Remote Control Manual.
NOTE ON LOUVER ANGLES
Fig. A
CAUTION
Do not put your fingers in or near the blower
and suction side of the unit. The high-speed
fan inside the unit may cause injury.
When using COOL or DRY mode, do not set
louver at too vertical an angle for long periods
of time. This can cause water to condense on
the louver blade, which will drop on your floor
or furnishings. (See Fig.A)
When using COOL or HEAT mode, setting the
louver at too vertical an angle can reduce the
performance of the unit due to restricted air
flow.
Deflector rod
The louver can be taken
down by releasing the
lock block.
Do not move louver by hand. This will cause the
louver to become out of sync. If this occurs, turn
off the unit and unplug it for a few seconds,
then restart the unit. This will reset the louver.
Fig. B
 Page 9 
Unit
Specifications
and Features
• Sleep Operation
The SLEEP function is used to decrease energy
use while you sleep (and don’t need the same
temperature settings to stay comfortable). This
function can only be activated via remote control.
Press the SLEEP button when you are ready to
go to sleep. When in COOL mode, the unit will
increase the temperature by 1°C (2°F) after 1
hour, and will increase an additional 1°C (2°F)
after another hour. When in HEAT mode, the unit
will decrease the temperature by 1°C (2°F) after
1 hour, and will decrease an additional 1°C (2°F)
after another hour.
It will hold the new temperature for 5 hours, then
the unit will turn off automatically.
Note: The SLEEP function is not available in
FAN or DRY mode.
SLEEP Operation
Set
temperature
+/- 1 C/2 F
+/- 1 C/2 F
1hr
1hr
7 hours
timer off
Saving energy during sleep
 Page 10 
Manual Operation (Without Remote)
How to operate your unit without
the remote control
Manual Operation
(Without Remote)
In the event that your remote control fails to
work, your unit can be operated manually with
the MANUAL CONTROL button located on
the indoor unit. Note that manual operation is
not a long-term solution, and that operating
the unit with your remote control is strongly
recommended.
2
CAUTION
The manual button is intended for testing
purposes and emergency operation only. Please
do not use this function unless the remote is
lost and it is absolutely necessary. To restore
regular operation, use the remote control to
activate the unit.
BEFORE MANUAL OPERATION
Unit must be turned off before manual
operation.
To operate your unit manually:
1. Locate the MANUAL CONTROL button on
the right-hand side panel of the unit.
2. Press the MANUAL CONTROL button one
time to activate FORCED AUTO mode.
3. Press the MANUAL CONTROL button again
to activate FORCED COOLING mode.
4. Press the MANUAL CONTROL button a third
time to turn the unit off.
 Page 11 
Manual control button
3
Care and Maintenance
Cleaning Your Indoor Unit
BEFORE CLEANING OR
MAINTENANCE
7. When dry, re-clip the air freshening filter to
the larger filter, then slide it back into the
indoor unit.
ALWAYS TURN OFF YOUR AIR CONDITIONER
SYSTEM AND DISCONNECT ITS POWER SUPPLY
BEFORE CLEANING OR MAINTENANCE.
Filter Tab
CAUTION
Only use a soft, dry cloth to wipe the unit clean.
If the unit is especially dirty, you can use a cloth
soaked in warm water to wipe it clean.
• 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 use water hotter than 40°C (104°F)
to clean the front panel. This can cause the
panel to deform or become discolored.
Cleaning Your Air Filter
3. If your filter has a small air freshening filter,
unclip it from the larger filter. Clean this air
freshening filter with a hand-held vacuum.
4 Clean the large air filter with warm, soapy
water. Be sure to use a mild detergent.
5. Rinse the filter with fresh water, then shake
off excess water.
6. Dry it in a cool, dry place, and refrain from
exposing it to direct sunlight.
Care and
Maintenance
A clogged air conditioner can reduce the cooling
efficiency of your unit, and can also be bad for
your health. Make sure to clean the filter once
every two weeks.
1. The air filter is under the top air inlet grill.
2. Grip the tab on the end of the filter, lift it
up,then pull it towards yourself.
Air freshening filter
(some units)
CAUTION
Do not touch air freshening (Plasma) filter for
at least 10 minutes after turning off the unit.
 Page 12 
CAUTION
•
•
•
•
Before changing the filter or cleaning,
turn off the unit and disconnect its power
supply.
When removing filter, do not touch metal
parts in the unit. The sharp metal edges can
cut you.
Do not use water to clean the inside of the
indoor unit. This can destroy insulation and
cause electrical shock.
Do not expose filter to direct sunlight when
drying. This can shrink the filter.
Maintenance –
Long Periods of Non-Use
If you plan not to use your air conditioner for an
extended period of time, do the following:
Clean all filters
Turn on FAN function until
unit dries out completely
Turn off the unit and
disconnect the power
Remove batteries
from remote control
Air Filter Reminders (Optional)
Air Filter Cleaning Reminder
After 240 hours of use, the display window on
the indoor unit will flash “CL.” This is a reminder
to clean your filter. After 15 seconds, the unit will
revert to its previous display.
To reset the reminder, press the LED button
on your remote control 4 times, or press the
MANUAL CONTROL button 3 times. If you don’t
reset the reminder, the “CL” indicator will flash
again when you restart the unit.
Maintenance –
Pre-Season Inspection
After long periods of non-use, or before periods
of frequent use, do the following:
Air Filter Replacement Reminder
Care and
Maintenance
After 2,880 hours of use, the display window on
the indoor unit will flash “nF.” This is a reminder
to replace your filter. After 15 seconds, the unit
will revert to its previous display.
To reset the reminder, press the LED button
on your remote control 4 times, or press the
MANUAL CONTROL button 3 times. If you don’t
reset the reminder, the “nF” indicator will flash
again when you restart the unit.
Check for damaged wires
Clean all filters
Check for leaks
Replace batteries
CAUTION
•
•
Any maintenance and cleaning of outdoor
unit should be performed by an authorized
dealer or a licensed service provider.
Any unit repairs should be performed by
an authorized dealer or a licensed service
provider.
Make sure nothing is blocking all air inlets and outlets
 Page 13 
Troubleshooting
4
SAFETY PRECAUTIONS
If ANY of the following conditions occurs, turn off your unit immediately!
• The power cord is damaged or abnormally warm
• 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.
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.
The unit changes
from COOL/HEAT
mode to FAN
mode
The unit may change its setting to prevent frost from forming
on the unit. Once the temperature increases, the unit will start
operating in the previously selected mode 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.
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.
 Page 14 
Troubleshooting
The indoor unit
emits white mist
Issue
Possible Causes
A rushing air sound may occur when the louver resets its
position.
The indoor unit
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.
Low hissing sound during operation: This is normal and is
caused by refrigerant gas flowing through both indoor and
outdoor units.
Both the indoor
unit and outdoor
unit make noises
Low hissing sound 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.
Squeaking sound: Normal expansion and contraction of
plastic and metal parts caused by temperature changes during
operation can cause squeaking noises.
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 odor
The unit may absorb odors 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.
Troubleshooting
The fan of the
outdoor unit does
not operate
During operation, the fan speed is controlled to optimize
product operation.
Operation
is erratic,
unpredictable,
or unit is
unresponsive
Interference from cell phone towers and remote boosters may
cause the unit to malfunction.
In this case, try the following:
• Disconnect the power, then reconnect.
• Press ON/OFF button on remote control to restart operation.
NOTE: If problem persists, contact a local dealer or your nearest customer service
center. Provide them with a detailed description of the unit malfunction as
well as your model number.
 Page 15 
Troubleshooting
When troubles occur, please check the following points before contacting a repair company.
Problem
Poor Cooling
Performance
Possible Causes
Solution
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
Too many sources of heat
in the room (people,
computers, electronics,
etc.)
Reduce amount of heat sources
Low refrigerant due to leak
or long-term use
Check for leaks, re-seal if
necessary and top off refrigerant
 Page 16 
Troubleshooting
SILENCE function can lower
SILENCE function is
product performance by reducing
activated(optional function) operating frequency. Turn off
SILENCE function.
Problem
The unit is not
working
The unit starts and
stops frequently
Poor heating
performance
Indicator lamps
continue flashing
Troubleshooting
Error code appears in
the window display
of indoor unit:
• E0, E1, E2…
• P1, P2, P3…
• F1, F2, F3…
Possible Causes
Solution
Power failure
Wait for the power to be
restored
The power is turned 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
Timer is activated
Turn timer off
There’s too much or too little
refrigerant in the system
Check for leaks and
recharge the system with
refrigerant.
Incompressible gas or
moisture has entered the
system.
Evacuate and recharge the
system with refrigerant
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
exetremtly low
Use auxiliary heating
device
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
The unit may stop operation or continue to run safely. If
the indicator lamps continue to flash or error codes appear,
wait for about 10 minutes. The problem may resolve itself.
If not, disconnect the power, then connect it again. Turn
the unit on.
If the problem persists, disconnect the power and contact
your nearest customer service center.
NOTE: If your problem persists after performing the checks and diagnostics above, turn off your
unit immediately and contact an authorized service center.
 Page 17 
5
European Disposal Guidelines
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.
Disposal
Information
 Page 18 
The design and specifications are subject to change without prior notice for
product improvement. Consult with the sales agency or manufacturer for details.
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