Page 1
LG Concealed Duct
Air Conditioner
OWNER'S MANUAL
LG
Visit us at http://www.lgservice.com
IMPORTANT
• Please read this owner's manual carefully and thoroughly
before installing and operating your room air conditioner.
• Please retain this owner's manual for future reference after
reading it thoroughly.
Dear Owner
Thank you for installing LG Air Conditioner.
Your best choice guarantees you a great
performance and service to make your life
comfortable & pleasant.
P/No.:MFL41032501
Page 2
2 Concealed Duct Air Conditioner
Concealed Duct Air Conditioner Owner’s Manual
TABLE OF CONTENTS
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Serial #
You can find them on a label on the side of each unit.
Dealer's Name
Date Purchased
■
Staple your receipt to this page in the event you need it
to prove date of purchase or for warranty issues.
READ THIS MANUAL
Inside you will find many helpful hints on how to use and
maintain your air conditioner properly. Just a little
preventive care on your part can save you a great deal
of time and money over the life of your air conditioner.
You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips first, you may not need to call for
service at all.
PRECAUTION
• Contact the authorized service technician for repair or
maintenance of this unit.
• Contact the installer for installation of this unit.
• The air conditioner is not intended for use by young
children or invalids without supervision.
• Young children should be supervised to ensure that
they do not play with the air conditioner.
• When the power cord is to be replaced, replacement
work shall be performed by authorized personnel only
using only genuine replacement parts.
• Installation work must be performed in accordance
with the National Electric Code by qualified and
authorized personnel only.
A. Safety Precautions.........................3
B. Product Introduction......................6
Name and function of parts ..............6
Deluxe wired remote controller.........7
C. Owner's Instruction........................8
Cooling Mode ...................................8
Heating Mode ...................................9
Auto Changeover Mode .................10
Dehumidification Mode...................11
Fan Mode .......................................12
Fan Speed Selection ......................13
D. Sub Function ................................14
Thermistor ......................................14
E. Special Function...........................15
Child Lock.......................................15
Damper control function .................16
Room Temperature Check .............16
Simple Reservation ........................17
Setting the current time ..................18
Weekday reservation......................19
F. Maintenance and Service.............20
Indoor Unit......................................20
Call the service immediately in the
following situations .........................20
Operation Tips!...............................21
When the air conditioner is not
going...............................................21
Troubleshooting Tips!
Save time and money!....................22
Page 3
Owner's Manual 3
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by
the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
WARNING
Always ground the product.
• There is a risk of electric shock.
Do not use a defective or underrated
circuit breaker. Use the correctly rated
breaker and fuse.
• There is risk of fire or electric shock .
Do not use a multi consent. Always use
this appliance on a dedicated cicuit and
breaker.
• Otherwise it can cause electric shock or fire.
For electrical work, contact the dealer, seller,
a qualified electrician, or an Authorized
Service Center. Do not disassemble or repair
the product by yourself.
• There is risk of fire or electric shock.
Always ground the product as per the
wiring diagram. Do not connect the
ground wire to gas or water pipes
lightening rod or telephone ground wire.
• There is risk of fire or electric shock.
Install the panel and the cover of control
box securely.
• There is risk of fire or electric shock due to
dust , water etc.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Do not modify or extend the power cable.
If the power cable or cord has scrathes or
skin peeled off or deteriorated then it
must be replaced.
• There is risk of fire or electric shock.
For installation, removal or reinstall ,
always contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock, explosion,
or injury.
Do not install the product on a defective
installation stand. Be sure that the
installation area does not deteriorate with
age.
• It may cause product to fall.
Never install the outdoor unit on a
moving base or a place from where it
can fall down.
• The falling outdoor unit can cause damage or
injury or even death of a person.
When the product is soaked (flooded or
submerged) in water , contact an
Authorized Service Center for repair
before using it again.
• There is risk of fire or eletric shock.
Be sure to check the refrigerant to the
used. Please read the label on the product.
• Incorrect refrigerant used can prevent the
normal operation of the unit.
Don't use a power cord, a plug or a loose
socket which is damaged.
• Otherwise it may cause a fire or electrical
shock.
Do not touch , operate, or repair the
product with wet hands. Hold the plug by
hand when taking out
• There is risk of electric shock or fire.
Do not place a heater or other heating
appliances near the power cable.
• There is risk of fire and electric shock.
Do not allow water to run into electric
parts. Install the unit away from water
sources.
• There is risk of fire, failure of the product, or
electric shock.
Do not store or use or even allow
flammable gas or combustibles near the
product.
• There is risk of fire.
WARNING
CAUTION
Page 4
4 Concealed Duct Air Conditioner
Safety Precautions
CAUTION
Two or more people must lift and
transport the product.
• Avoid personal injury.
Do not install the product where it will be
exposed to sea wind (salt spray) directly.
• It may cause corrosion on the product.
Install the drain hose to ensure that the
condensed water is drained away properly.
• A bad connection may cause water leakage.
Keep level even when installing the
product.
• To avoid vibration or noise.
Do not install the product where the noise
or hot air from the outdoor unit could
damage or disturb the neighborhoods.
• It may cause a problem for your neighbors
and hence dispute.
Always check for gas (refrigerant)
leakage after installation or repair of
product.
• Low refrigerant levels may cause failure of
product.
Indoor/outdoor wiring connections must
be secured tightly and the cable should
be routed properly so that there is no
force pulling the cable from the
connection terminals.
• Improper or loose connections can cause
heat generation or fire.
Safely dispose off the packing materials.
Like screws, nails, batteries, broken
things etc after installation or svc and
then tear away and thraw away the plastic
packaging bags.
• Children may play with them and cause
injury.
Make sure to check that the power cable
plug is not dirty, loose or broken and
then only insert the plug completely.
• Dirty, loose or broken power plug can
cause electric shock or fire.
Do not use the product in a tightly closed
space for a long time. Perform ventilation
regularly.
• Oxygen deficiency could occur and hence
harm your health.
Do not open the front grille of the product
during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
• There is risk of physical injury, electric shock,
or product failure.
If strange sounds, smell or smoke comes
from product.Immediately turn the breaker
off or disconnect the power supply cable.
• There is risk of electric shock or fire.
Ventilate the product room from time to
time when operating it together with a
stove, or heating element etc.
• Oxygen deficiency can occur and hence harm
your health.
Turn the main power off and unplug the
unit when cleaning or repairing the
product.
• There is risk of electric shock.
When the product is not to be used for a
long time, disconnect the power supply
plug or turn off the breaker.
• There is risk of product damage or failure, or
unintended operation.
Take care to ensure that nobody
especially kids could step on or fall onto
the outdoor unit.
• This could result in personal injury and
product damage.
Take care to ensure that power cable
could not be pulled out or damaged
during operation.
• There is risk of fire or electric shock.
Do not place ANYTHING on the power
cable.
• There is risk of fire or electric shock.
Do not plug or unplug the power supply plug to turn the unit
ON/OFF .
• There is risk of fire or electric shock.
When flammable gas leaks, turn off the gas and open a window
for ventilation before turn the product on.
• Do not use the telephone or turn switches on or off. There is risk of
explosion or fire.
In outdoor unit the step-up capacitor
supplies high voltage electricity to the
electrical components. Be sure to
discharge the capacitor completely
before conducting the repair work.
• An charged capacitor can cause electrical
shock.
When installing the unit, use the
installation kit provided with the product.
• Otherwise the unit may fall and cause severe
injury.
Be sure to use only those parts which
are listed in the svc parts list. Never
attempt to modify the equipment.
• The use of inappropriate parts can cause an
electrical shock, excessive heat generation or
fire.
Page 5
Owner's Manual 5
Safety Precautions
Do not use the product for special purposes,
such as preserving foods, works of art, etc. It
is a consumer air conditioner, not a precision
refrigeration system.
• There is risk of damage or loss of property.
Do not block the inlet or outlet of air flow.
• It may cause product failure.
Use a soft cloth to clean. Do not use
harsh detergents, solvents or splashing
water etc .
• There is risk of fire, electric shock, or damage
to the plastic parts of the product.
Do not touch the metal parts of the
product when removing the air filter.
• There is risk of personal injury.
Do not step on or put anyting on the
product. (outdoor units)
•
There is risk of personal injury and failure of product.
Always insert the filter securely after
cleaning. Clean the filter every two weeks
or more often if necessary.
• A dirty filter reduces the efficiency.
Do not insert hands or other objects
through the air inlet or outlet while the
product is operating.
• There are sharp and moving parts that could
cause personal injury.
Be cautious when unpacking and
installing the product.
• Sharp edges could cause injury.
If the refrigerant gas leaks during the
repair, do not touch the leakaing
refrigerant gas.
• The refrigernat gas can cause frostbite (cold
burn)
Do not tilt the unit when removing or
uninstalling it.
• The condensed water inside can spill .
Do not mix air or gas other than the
specified refrigerant used in the system .
• If air enters the refrigerant system, an
excessively high pressure results, causing
equipment damage or injury.
If the refrigerant gas leaks during the
installation, ventilate the area immediately.
• Otherwise it can be harmfull for your health.
Dismantling the unit, treatment of the
refrigerant oil and eventual parts should
be done in accordance with local and
national standards.
Replace the all batteries in the remote
control with new ones of the same type.
Do not mix old and new batteries or
different types of batteries.
• There is risk of fire or product failure.
Do not recharge or disassemble the
batteries. Do not dispose off batteries in
a fire.
• They may burn or explode.
If the liquid from the batteries gets onto
your skin or clothes, wash it well with
clean water. Do not use the remote if the
batteries have leaked.
• The chemicals in batteries could cause burns
or other health hazards.
Do not let the air conditioner run for a
long time when the humidity is very high
and a door or a window is left open.
• Moisture may condense and wet or damage
furniture.
Do not expose your skin or kids or
plants to the cool or hot air draft.
• This could harm to your health.
Do not drink the water drained from the product.
• It is not sanitary and could cause serious health issues.
Use a firm stool or ladder when cleaning, maintaining or
repairing the product at an height.
• Be careful and avoid personal injury.
OPERATING TEMPERATURE(°C) - Non Inverter Model
COOLING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
32°C18°C46°C21°C
HEATING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
30°C16°C24°C-5°C
OPERATING TEMPERATURE(°C) - Inverter Model
COOLING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
32°C18°C46°C -10°C
HEATING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
30°C16°C24°C -10°C
Page 6
6 Concealed Duct Air Conditioner
Product Introduction
Product Introduction
1: Indoor unit
2: Outdoor unit
3: Wired Remote Controller
4: Inlet air
5: Discharge air
6: Refrigerant piping, connection electric wire
7: Drain pipe
8: Ground wire
wire to ground outdoor unit to prevent electrical shocks.
*The shape of products can be chaged as the model capacity and type.
6
7
2
8
ZONE 1 ZONE 2ZONE 3 ZONE 4
AUTOINDOOR REMO
ZONE 1ZONE 2 ZONE 3ZONE 4
2TH
REMO
AUTO INDOOR
Wired Remote
Controller
3
4
5
Air intake
vents
1
Air outlet
vents
Name and function of parts
Page 7
Owner's Manual 7
Product Introduction
Deluxe wired remote controller
Each function will be shown on the display panel for three second or so when the initial power is on.
The analog panel enables you to use the remote controller with a touch of your own finger without pressing any
extra button.
However, if you press more than one button at the same time, it may cause malfunction.
The above picture differ from model to model.
1. Operation display panel
2. Room temperature button
3. Fan speed button
4. Fan/ Plasma/ Zone1 button
5. Auto/ Indoor/ Zone2 button
6. Timer mode button
7. Date selection button
8. Hour/Minute button
9. Mode selection button
10. On/Off button for reservation
11. Temperature control button
12. On/Off button
13. Special function button
14. Dehumidification/ Heater/
Child lock button
15. Sub function button
16. Easy reservation button
17. Cancel button
18. Heating/ Two thermistor/
Zone4 button
19. Setting button
20. Cooling/ Remo/ Zone3 button
1
AUTO INDOOR REMO
ZONE 1 ZONE 2 ZONE 3 ZONE 4
2
3
4
AUTO INDOOR
ZONE 1 ZONE 2 ZONE 3 ZONE 4
5
6
7
8
9
10
11
12
13
2TH
REMO
14
15
16
17
18
19
20
Page 8
8 Concealed Duct Air Conditioner
Owner's Instruction
What is the three-minute delay function?
The function to protect the compressor delays the output of cool air when operating instantly after
interrupting the cooling mode .
Cooling mode restarts after 3 minutes when the compressor starts to operate.
1
Press the button and then press the button.
3
Press the button and choose one of the functions
among
, , ,
and if you want another
operation mode during the operation.
AUTO
4
If you press the button, the cooling mode will
stop.
2
Press the button and set the expected
temperature lower than the current room temperature.
(18~30°C)
If the expected temperature is set higher than the current
room temperature, the cooling function will not begin and
just the blowing operation will continue.
Cooling Mode
Owner's Instruction
• You can choose the expected temperature from 18˚C to 30˚C.
• It is recommended that the ideal difference of the temperature between indoors and outdoors should be
less than 5°C.
AUTO INDOOR REMO
ZONE 1 ZONE 2 ZONE 3 ZONE 4
2TH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMO
A click of the button will increase the expected
temperature by 1°C
A click of the button will decrease the expected
temperature by 1°C.
AUTO
Page 9
Owner's Manual 9
Owner's Instruction
What is the three-minute delay function?
It will take a time for the product to blow warm air. The delay is just to protect the compressor.
The room will be heated with warm air after three minutes when the compressor begins operation.
■ The cooling-only model will not do heating function.
Heating Mode
1
Press the button and then press the button.
2
Set the expected room temperature higher than the
current room temperature. (16~30°C)
3
Press the button and choose one of the functions
among , , ,and if you want another
operation mode during the operation.
AUTO
4
If you press the button, the heating operation will
stop.
* If the expected temperature is set lower than the current
room temperature, the heating operation will not begin
and just the blowing operation will continue.
AUTO INDOOR REMO
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMO
2TH
A click of the button will increase the expected
temperature by 1°C
A click of the button will decrease the expected
temperature by 1°C.
AUTO
Page 10
10 Concealed Duct Air Conditioner
Owner's Instruction
1
Press the button and then press the button.
AUTO
2
When the expected temperature is lower than the
room temperature : Cooling Mode.
When the expected temperature is higher than the
room temperature : Heating Mode
3
Press the button and choose one of the functions
among
, , ,
and if you want
anotheroperation mode during the operation.
4
If you press the button, the cooling mode will
stop.
Auto Changeover Mode
INDOOR REMO
AUTO
ZONE 1 ZONE 2 ZONE 3 ZONE 4
2TH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMO
AUTO
Page 11
Owner's Manual 11
Owner's Instruction
AUTO INDOOR REMO
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
2TH
REMO
AUTO
1
Press the button on the remote controller.
2
Select the dehumidification function by pressing the
button and the button.
3
When the dehumidification is being done, ”dh” will be
shown on the display panel
4
Press the button and choose one of the functions
among , , ,
and if you want
another operation mode during the operation.
AUTO
Dehumidification operation: Dehumidification by lowering temperature slightly
If used during the rainy season or high humidity, you can have both of effective dehumidifying
and air conditioning effect.
❈ Temperature control is not available in the dehumidification operation.
Dehumidification Mode
Page 12
12 Concealed Duct Air Conditioner
Owner's Instruction
AUTO INDOOR REMO
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
2TH
REMO
AUTO
1
Press the button on the remote controller.
2
Select the fan function by pressing the button
and button.
3
When the fan is being done, "Fn" will be displayed on
the display panel.
4
Press the button and choose one of the functions
among
, , ,
and if you want
another operation mode during the operation.
AUTO
• When fan mode is operated, the outdoor compressor doesn't work.
• FAN operation doesn't bring out cold air but air from regular fan comes out.
• Have a function to circulate the indoor as it sends out the air that doesn't have much
temperature difference with indoor.
Fan Mode
Page 13
Owner's Manual 13
Owner's Instruction
1
Select the proper fan speed which you want by
pressing the button on the remote controller.
• If you press the button, the strength of the fan
speed will change in the order of Low → Med
→Hi .
• If the product is not compatible with the fan speed
control, it will not function as your selection.
• If the indoor unit is compatible with the slo fan speed, you
can adjust the air flow slow level.
You can easily control the fan speed.
Fan Speed Selection
AUTO INDOOR REMO
ZONE 1 ZONE 2 ZONE 3 ZONE 4
2TH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMO
Fan Speed Selection
Lo
Med
Hi
Page 14
Sub Function
14 Concealed Duct Air Conditioner
Sub Function
Thermistor
1
Press the button on the remote controller.
2
Set thermistor mode by pressing , ,
button.
2TH
REMO
INDOOR
* System will use value that sensed indoor unit or
remote controller.
Function
Operation in indoor unit temperature
sensor.
Operation in remote controller
temperature sensor.
• Cooling Mode:Operating lower
temperature sensor comparing the
Remote Controller and Indoor Unit(or
Remote Sensor) temperature.
• Heating Mode:Operating higher
temperature sensor comparing the
Remote Controller and Indoor Unit(or
Remote Sensor) temperature
2TH
REMO
INDOOR
Selected
button
AUTO INDOOR
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMO
REMO
2TH
INDOOR
REMO
2TH
Page 15
Special Function
Owner's Manual 15
Special Function
This is a function to prevent tampering of settings by children or others.
You can use the child lock function.
Child Lock
1
Press the button of the remote controller.
2
Press button.
• A click of the child lock button will turn on/off the indicator.
• If you press another button while adjusting child lock
function, the temperature display will show CL for three
seconds and then the operation will come back to the
original mode.
• If you want use the child lock function in off mode, select
child lock and press the button within three seconds.
• If you want to cancel the child lock function in the off
mode, just press button.
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMOAUTO INDOOR
REMO
REMOAUTO INDOOR
REMO
2TH
REMO
REMOAUTO INDOOR
2TH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
2TH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
Page 16
Special Function
16 Concealed Duct Air Conditioner
1
If you press button on the remote controller, the
indoor temperature displays for 5 seconds. The display
goes to a previous screen after 5 seconds.
Room temperature value is based on thermistor
setting.
❈ There would be some difference between actual
temperature you feel and room temperature of remote
controller , because the temperature of the position is
not uniform which the remote controller is located on.
Room Temperature Check
You can control zones when you've installed the Damper controller new type.
Damper control function
2
Press
,,.
button.
then select zone is displayed.
• A click of the desired zone will turn on/off it's indicator.
• At least one zone always is to be left on.
This will not allow you to turn off the last zone operating.
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4
ZONE 3
ZONE 2
ZONE 1
❈ It can be activated from zone1 to zone 4 in the remote screen even if you do not use Damper Controller.
1
Press the button.
ZONE 2 ZONE 3 ZONE 4
ZONE 1
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMOAUTO INDOOR
REMO
2TH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMOAUTO INDOOR
2TH
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMO
Page 17
Special Function
Owner's Manual 17
1
Press button on the remote
controller.
2
Press easy button.
3
You can change the values by pressing the
control buttons. Choose a desired reservation time.
4
By pressing the button, set your simple
reservation time turn-on reservation can be set only
when not in operation
- You can set reservation from 1 to 24 hours
5
Turn-off reservation can be set only when in operation
Turn-on reservation can be set only when in off mode.
- If turn-on reservation was set, it will start operating
after the set time
- Turn-off reservation was set, it will stop operating
after the set time
- Excessive use of air conditioning is bad for your
health. Please set a moderate amount of time for
your reservation.
- It works deluxe wired remote controller's reservation
time, if preset time by wrieless and deluxe wired
remote controller at the same time .
Simple Reservation
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMOAUTO INDOOR
REMO
2TH
Page 18
Special Function
18 Concealed Duct Air Conditioner
Setting the current time
1
You can set the current time by pressing the time
display.
When the time display is selected, a window for date
and time setting shows up.
4
After adjusting time, press the button so that the
current configuration can be saved.
2
Press the button.
If you press the button, the day of the week will
flash. Then you can choose the proper day in the order
of Monday, Tuesday, Wednesday, Thursday, Friday,
Saturday, and Sunday.
3
If you press the button, the hour digits will flash so
that you can adjust it by pressing the button. If
you press the button one more
time, the minute digits will flash. You can adjust it by
pressing the button.
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMOAUTO INDOOR
REMO
2TH
Page 19
Special Function
Owner's Manual 19
Weekday reservation
1
Press the button on the control panel of the remote
controller.
2
Select the day of week to set using the button.
4
After selecting the day of week, select the time to turn
on the product using the button.
Press the
button one more time to
set the minute using the
button and press the button.
3
After pressing the button decide the time to turn
off the air conditioner using the button.
If the off icon blinks for a while and then stops on the
time display panel, it is successfully set.
5
To set for other days of the week, press the button
and set the time in the same procedure.
Press the button to exit the reservation mode.
6
To cancel the weekday reservation function, press the
and then cancel.
If you see an outline box around the day of week, it
means that time to start and end have been set. When
selecting the reservation mode, other function button
cannot be entered.
- It works deluxe wired remote controller's reservation
time, if preset time by wrieless and deluxe wired remote
controller at the same time .
Weekday reservation is the function to set the time to turn on and off for each day during the week
from monday through sunday.
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
REMOAUTO INDOOR
REMO
2TH
Page 20
Maintenance and Service
20 Concealed Duct Air Conditioner
Maintenance and Service
Air outlet vent
Indoor Unit
Grille, Case and Remote Control
❐ Turn the system off before cleanining, To clean, wipe with a soft, dry cloth. Do not use bleach or abrasives.
Supply power must be disconnected before cleaning the indoor unit.
Call the service immediately in the following situations
1. Anything abnormal such as burning smell, loud noise etc. happen. Stop the unit and turn the breaker off. Never
try to repair by yourself or restart the system in such cases.
2. Main power cord is too hot or damaged.
3. Error code is generated by self diagnosis.
4. Water leaks from indoor unit.
5. Any switch, breaker (safety, earth) or fuse fails to work properly
User must carry routine checkup & cleaning to avoid unit’s poor performance.
In case of special situation, the job must be carried out by the only service person.
Two wired remote controller
• All wired remote controllers are displayed on identical information.
• Last used wired romote controller has priority on product's movement.
NOTE
Page 21
Owner's Manual 21
Maintenance and Service
Operation Tips!
Filter
Do not overcool the room.
This is not good for the health and wastes electricity.
Keep blinds or curtains closed.
Do not let direct sunshine enter the room when the air
conditioner is in cooling operation.
Make sure that the doors
and windows are shut tight.
Avoid opening doors and windows as much as possible
to keep the air conditioned air in the room.
Ventilate the room occasionally.
Since windows are kept closed, it is a good idea to open
them and ventilate the room from time to time.
The units shipped without a filter and is the responsibility of the installer to secure a filter in the return air
ductwork.
Filter must always be used and must be kept clean.
When filters become dirt laden, insufficient air will be delivered by the blower, decreasing your units efficiency
and increasing operating costs and wear-and-tear on the units and controls.
Filters should be checked monthly especially since the unit may be used for both heating and cooling
When the air conditioner is not going....
When it is not going to be used for a long time.
1 Operate the air conditioner on Air circulation mode for 2 to 3 hours.
• This will dry out the internal parts.
2 Turn off the circuit breaker.
CAUTION: Turn off the circuit breaker when the air conditioner is not going
to be used for a long time.
Dirt may collect and may cause a fire.
3. Remove the batteries from the Remote Controller.
When the air conditioner is to be used again.
■ Check that the air inlet and outlet of the indoor/outdoor unit are not blocked.
Page 22
22 Concealed Duct Air Conditioner
Maintenance and Service
Check the following points before requesting repairs or service.... If the malfunction persist, please contact your dealer.
Troubleshooting Tips! Save time and money!
The air conditioner does not
operate.
The room has a peculiar odor.
It seems that condensate is
leaking from the air conditioner.
Air conditioner does not operate
for about 3 minutes when restart.
Does not cool or heat effectively.
The air conditioner operation is
noisy.
Crack sound is heard.
Remote control display is faint, or
no display at all.
• Have you made a mistake in timer operation?
• On first starting, the indoor unit operates in
fifteen seconds.
• Has the fuse blown or has the circuit breaker
been tripped?
•
Check that this is not a damp smell exuded by the
walls, carpet, furniture or cloth items in the room.
• Condensation occurs when the airflow from the
air conditioner cools the warm room air.
• This is the protector of the mechanism.
•
Wait about three minutes and operation will begin.
•
Is the air filter dirty? See air filter cleaning instructions.
• The room may have been very hot when the
room air conditioner was first turned on. Allow
time for it to cool down.
•
Has the setting temperature been set incorrectly?
• Are the indoor unit's air inlet or outlet vents
obstructed?
• For a noise that sounds like water flowing.
-This is the sound of freon flowing inside the air
conditioner unit.
• For a noise that sounds like the compressed air
releasing into atmosphere.
-
This is the sound of the dehumidifying water
being processed inside the air conditioning unit.
• This sound is generated by the
expansion/contraction of the inlet grille, etc. due
to changes of temperature.
• Has the circuit breaker been tripped?
17
-
-
-
-
8, 9
-
-
-
Case Explanation See page
Page 23
P/No.:MFL41032502 Printed in Korea
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