LG MFL39817402 User manual

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LG
Room Air Conditioner
OWNER'S MANUAL
nd thoroughly
3ir conditioner.
reference after

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.
sO 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.
2Room Air Conditioner

SafetyPrecautions
Topreventinjurytothe useror otherpeopleandpropertydamage,thefollowinginstructionsmustbefollowed.
•Incorrectoperationduetoignoringinstructionwillcauseharm ordamage.Theseriousnessis classifiedby
the following indications.
F
, .WARNING Thissymbolindicates the possibility of death or serious injury.CAUTION This symbol indicates the possibility of injury or damage.
• Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
®
°Thereisariskofelectricshock.
°Thereisriskoffireorelectricshock.
, Thereisriskoffireorelectricshock.
, Itmaycauseproducttofall.
°Anchargedcapacitorcancauseelectrical
shock.
,_WARNING _
°Thereisriskoffireorelectricshock.
°Thereisriskoffireorelectricshock.
°Thereisriskoffireorelectricshock.
,Thefallingoutdoorunitcancausedamageor
injuryorevendeathofaperson.
, Otherwisetheunitmayfallandcausesevere
injury.
,Otherwiseitcancauseelectricshockorfire.
,Thereisriskoffireorelectricshockdueto
dust,wateretc.
,Thereisriskoffire,electricshock,explosion,
orinjury.
,Thereisriskoffireoreletricshock.
,Theuseofinappropriatepartscancausean
electricalshock,excessiveheatgenerationorfire.
Owner's Manual 3

SafetyPrecautions
°Improperorlooseconnectionscancause
heatgenerationorfire.
, Incorrectrefrigerantusedcanpreventthe
normaloperationoftheunit.
, Thereisriskoffireandelectricshock.
, Oxygendeficiencycouldoccurandhence
harmyourhealth.
,Oxygendeficiencycanoccurandhenceharm
yourhealth.
,Thiscouldresultinpersonalinjuryand
productdamage.
,Thereisriskoffireorelectricshock.
,Avoidpersonalinjury.
°Toavoidvibrationornoise.
°Childrenmayplaywiththemandcause
injury.
°Otherwiseit maycauseafireorelectrical
shock.
°Thereisriskoffire,failureoftheproduct,or
electricshock.
,Thereisriskofphysicalinjury,electricshock,
orproductfailure.
°Thereisriskofelectricshock.
°Thereisriskoffireorelectricshock.
,Dirty,looseorbrokenpowerplugcancause
electricshockorfire.
,Thereisriskofelectricshockorfire.
,Thereisriskoffire.
,Thereisriskofelectricshockorfire.
,Thereisriskofproductdamageorfailure,or
unintendedoperation.
,Thereisriskoffireorelectricshock.
°Donotusethetelephoneorturnswitchesonoroff.Thereisriskof
explosionorfire.
CAUTION
4 Room Air Conditioner
°Itmaycausecorrosionontheproduct.
, Itmaycauseaproblemforyourneighbors
andhencedispute.
,A badconnectionmaycausewaterleakage.
°Lowrefrigerantlevelsmaycausefailureof
product.

,Thereisriskofdamageorlossofproperty.
°Thereisriskofpersonalinjury.
,Therearesharpandmovingpartsthatcould
causepersonalinjury.
,Thecondensedwaterinsidecanspill.
,Thechemicalsinbatteriescouldcauseburns
orotherhealthhazards.
,Thiscouldharmtoyourhealth.
,Itmaycauseproductfailure.
,Thereisriskofpersonalinjuryandfailureof
product.
,Sharpedgescouldcauseinjury.
Safety Precautions
, Ifairenterstherefrigerantsystem,an
excessivelyhighpressureresults,causing
equipmentdamageorinjury.
°Thereisriskoffireorproductfailure.
°Thechemicalsinbatteriescouldcauseburns
orotherhealthhazards.
°Itisnotsanitaryandcouldcauseserious
healthissues.
,Thereisriskoffire,electricshock,ordamage
totheplasticpartsoftheproduct.
,A dirtyfilterreducestheefficiency.
,Therefrigernatgascancausefrostbite(cold
burn)
,Otherwiseitcanbeharmfullforyourhealth.
,Theymayburnorexplode.
,Moisturemaycondenseandwetordamage
furniture.
,Becarefulandavoidpersonalinjury.
Owner's Manual 5

ElectricalSafety
AWARNING
•This appliance must be properly grounded.
To minimize the risk of electric shock, you must alway plug into a grounded oulet.
• Do not cut or remove the grounding prong from the power plug.
• Attaching the adapter ground terminal to the wall receptacle cover screw does not ground the appliance
unless the cover screw is metal and not insulated, and the wall receptacle is grounded through the
house wiring.
• Ifyou have any doubt whether the air conditioner is properly grounded, have the wall receptacle and
circuit checked by a qualified electrician.
We strongly discourage the use of an adapter due to potential safety hazards. For temporary connections,
use only a genuine adapter, available from most local hardware stores. Ensure that the large slot in the
adapter is aligned with the large slot in the receptacle for a proper polarity connection.
To disconnect the power cord from the adapter, use one hand on each to avoid damaging the ground
terminal. Avoid frequently unplugging the power cord as this can lead to eventual ground terminal damage.
,&WARNING
• Never use the appliance with a broken adapter.
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that may cause harm to the
air conditioner.
=
M/0R" This symbol indicates special notes.
6Room Air Conditioner

ProductIntroduction
Here is a brief introduction of the indoor and outdoor units. Please see the information specific to your
indoor unit type.
Air inlet
Air filter
Plasma filter
Air discharge
Front panel
Signal receiver Power cord
ON/OFF button
On/Off
'_ Sleep mode
Energy-Saving
Cooling Mode
_| /))) Plasma
Q Timer
-X-
0 Defrost mode
Lights up during the system operation, errorcode and auto restart setting.
Lights up during sleep mode auto operation.(non-lnverter Model)
Lights up during Energy-Saving Cooling Mode Operation(Inverter Model only)
The function illustrates itsdynamic mode by using a multiple lighting system.
Lights up during timer operation.(non-lnverter Model)
Lights up during timer operation or sleep mode auto operation (Inverter Model only)
Lights up during defrost mode or *hot start operation (Heat pump model only)
OUT/,_ Outdoor unit Lights up during outdoor unit operation. (Cooling model only)
DOORr_ operation
BB Power Display : Indicates the settingtemperature and operation mode.
Cooling,heating, Auto operation mode Jet Energy-saving Test Auto
Dehumidification
Mode Standard Too hot Hot Comfortable Cold Too cold Cool/Heat coolingmode operation clean
i-_ L- in--
h of: Setting R_-- 2 -- i L7 /2t-- _C_/.,_/._--I /.,_/.__1
temperature
* Hot start operation: Stopsthe indoor fan in heating operation for minutes to prevent cold airfrom blowingout
from unit.
* Indefrost mode unit stops heating operation for few minutes to remove formation ofice on the heat
exchangercoils tomaintain the efficiency.
Connecting
wires
igerant pipes
Air outlet vents
Base plate
Owner's Manual 7

OperatingInstructions
1. Remove the battery cover by pulling it according to the arrow
direction.
2. Insert new batteries making sure that the (+) and (-) of battery are
installed correctly.
3. Reattach the cover by sliding it back into position.
1. Always use/replace both batteries of same type.
2. If the system is not to be used for a long time, remove the
batteries to save their working life.
3. If the display screen of remote controller starts, fading replace
both of the batteries.
1. Choose a suitable place where its safe & easy
to reach.
2. Fix the holder to wall etc with the supplied
screws firmly.
3. Slide the remote controller inside the holder.
1. Remote controller should never be exposed to
direct sunlight.
2. Signal transmitter & receiver should always be
clean for proper communication. Use a soft
cloth to clean them.
3. In case some other appliances also get
operated with remote control, change their
position or consult your serviceman.
1. The signal receiver is inside the unit.
2. Aim theremotecontrollertowardstheunitto operateit.
There shouldnotbeany blockagein between. ]
8 Room Air Conditioner

OperatingInstructions
The controls will look like the following.
_[_ Signal transmitter
ra Operation Mode a
Flip-up door
(opened)
i.
• Cooling Model(,_), Heat Pump Model(J)
1. START/STOP BUTTON
Used to turn off/on the unit.
2. OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
3. ROOM TEMPERATURE SETTING BUTTONS
Used to select the room temperature.
4. INDOOR FAN SPEED SELECTOR BUTTON
Used to select fan speed in four steps
low, medium, high and CHAOS.
5. JET COOL/HEAT BUTTON
Used to start or stop the speed cooling/heating.
(It operates fan in super high speed)
6. CHAOS SWING BUTTON
Used to stop or start louver movement and set the
desired up/down airflow direction.
7. ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping
operation.
8. TIME SETTING BUTTONS
Used to adjust the time.
9. TIMER SET/CANCEL BUTTON
Used to set and to cancel the timer operation.
10. SLEEP MODE AUTO BUTTON
Used to set sleep mode auto operation.
11. _ AIR CIRCULATION BUTTON(OPTIONAL)
Usedto circulatetheroomairwithoutcoolingor heating.
ENERGY-SAVING COOLING MODE BUTTON
(OPTIONAL) For inverter type models
12. ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
13. PLASMA BUTTON(OPTIONAL)
Used to start or stop the plasma-purification function.
14. HORIZONTAL AIRFLOW DIRECTION CONTROL
BUTTON (OPTIONAL)
Used to set the desired horizontal airflow direction.
15. RESET BUTTON
Used prior to resetting time.
16.2nd F BUTTON
Used prior to using modes printed in blue at the
bottom of buttons.
17.AUTO CLEAN BUTTON(OPTIONAL)
Usedto set autocleanmode.
In some modelsthis button hasa 2nd function ofLED
luminositycontrol.
18.°CTO °FSWITCHINGBUTTON
Usedto switch temperaturereadingfrom Centigradeto
Fahrenheit.
19.LCD LUMINOSITYBUTTON(OPTIONAL)
Usedto adjustLCD luminosity.
To use the functions printed in blue at the bottom of the buttons press 2°dF button first and then the required function
button. Pressing the 2'd F button activates the blue printed function of the respective button. To cancel the function
press the 2nd F button again else it will automatically cancel if remains idle after 10 seconds.
Owner's Manual 9

OperatingInstructions
r;esth'heST:: 1
4
Open the door of the remote controller and press the
operation mode button. Each time the button is pressed, the
operation mode is shifted in the direction of the arrow.
iiiii!!iHiii!Hii!iiiiii!iiiiiiiiiiiiiiii,i! iiiiiii iii
_h_g y g
Changeover Dehumidification(Heatpumpm0del0@
Auto Operation (Cooling Only Model)
,_ or cooling or heating operation set the desired indoor
temperature by pressing the ROOM TEMPERATU RE _ r_ Toraisethetemperature
SETTING BUTTONS.
For cooling the temperature can be set within 18°0-30°0 '_--_J _
(64°F_86LF) and!or hatting the temperature range is _ ToIow_erthetemperature
Set the fan speed with the remote controller. You can select the fan speed in four steps-low,
medium, high and CHAOS by pressing the INDOOR FAN SPEED SELECTOR BUTTON.
Each time the button is pressed, the fan speed mode is shifted.
CHAOS Air Fan speed is on low. Fan speed is on medium. Fan speed is on high.
N_at#ralwind by the CHAOS logic 1
I CIForfresherfeeling,pressthe INDOORFANSPEEDSELECTORBUTTONselectorandset toCHAOSmode.
Inthismode,thewindblowslikea naturalbreezeby automaticallychangingfan speedaccordingtothe CHAOSlogic.
10 Room Air Conditioner

iii
Operating Instructions
fDuringHealthy DehumidificationOperation
u Ifyou select thedehumidificationmode onthe OPERATIONMODE
SELECTIONBUTTON,theproduct startsto runthe dehumidification
function. Itautomaticallysets theroomtemperatureandairflow volumeto
the best conditionfor dehumidification,basedonthe sensedcurrent room
temperature.
Inthiscase, however,thesettingtemperatureis notdisplayed onthe remote
controllerandyou are notable to controlthe roomtemperatureeither.
u During the healthy dehumidification function, the airflow volume is
automaticallyset according to theoptimization algorithmrespondingto the
current roomtemperature status,so that the roomconditionis kept healthy
andcomfortableeven in thevery humidseason.
_To run the healthy dehumidification mode follow steps 1, and 2 and 4 I
(See operation mode)
fIn this operation mode the actual setting temperature and the fan speed
are automatically set by the electronic control logic based on the current
room temperature. If you feel hotor cold press the temperature setting
buttons respectively for more cooling or heating effect.
NOTE : You cannot set the actual setting temperature and the indoor fan
speed in this operation mode. Butyou can use the Chaos swing
in this operation.
Ifthe system is not operating as desired, switch manually to
another mode.
ulllllll
Auto operation basically is heating or cooling function of the air
conditioner.
But during this operation the controller changes the operation mode
automatically to keep the temperature within +2°C with respect to the
Owner's Manual 11

OperatingInstructions
i i i
function can be used to coolthe roomquickly in hot summer. When this
function isturned on, the airconditioner runs in cooling operation modewith super
high fan speed and 18°C(64°F) setting temperature for 30 minutes for fast and
effective cooling.
Similarly, jet heat function (available only in some models)warms up the room quickly
by operating atsuper high fan speed and 30°C(86°F) setting temperature for 60
minutes.
You can activatethisoperationby pressingthe JET COOLBUTTON.
To changefromjet coolmodetohigh fan speedcoolingmode,presstheJETCOOLBUTTONor
INIDOORFANSPEEDSELECTORBUTTONortheROOMTERPERATURESETTINGBUTTONagain.
• Jet cool function cannot be activated during heating or auto changeover operations.
• Incase of Inverter, Art Cool and Art Cool Wide(non-Deluxe) model, you can use jet heat function by
pressing JET COOL BUTTON for heating operation.
• Art Cool and Art Cool Wide models close the side discharges during jet cool/heat operation, for strong
cooling and heating.
I .-4_
IQ c| I lasma filter is a technology developed by LG to get rid of microscopic
contaminants in the intake air by generating a plasma of high charge electrons.
This plasma kills and destroys the contaminants completely to provide clean and
hygienic air.
Plasma purification can be started by pressing the PLASMA BUTTON onthe remote controller.
Repressing it will deactivate the operation.
This feature can be used in any operation mode and any fan speed can be used while
plasma filter isfunctioning.
During auto clean function, moistures left in indoor units after cooling operation or healthy dehumidification
operation can be removed.
AUTOCLEAN 1. Press the AUTO CLEAN BUTTON to activate this function.
2. Now whenever the unit is turned off, the indoor fan is still running for about 30
minutes internally without cooling or dehumidification operation. Also the louver is
closed.
3. This dries up any remains of moisture & cleans the unit internally.
4. If you press AUTO CLEAN BUTTON again during operation, this function is
cancelled.
During auto clean function, only START/STOP BUTTON, PLASMA BUTTON and AUTO CLEAN BUTTON
can be used.
12 Room Air Conditioner

OperatingInstructions
i
_ing automatica!lydeEnergy-savingcooling mode can save energy in cooling and healthy dehumidification operation, because it
an operate efficiently by setting body-adaptation time according to the change of time and temperature and J
sired temperature.
1. Press the START/STOP BUTTON to start the unit.
2. Open the door on the remote controller.
Select cooling operation or healthy dehumidification operation.
3. Press the ENERGY-SAVING COOLING MODE BUTTON.
4. To cancel the energy-saving cooling mode, press the ENERGY-SAVING
COOLING MODEL BUTTON again and unit will operate in previous
mode(Cooling or healty dehumidification mode).
The Display Luminosity can be adjusted by using the remote control.
Press the start/stop button to start the unit. Open the door on the remote control, press the 2ndF button
and, press display luminosity button.
Display will be dark. Press the button again to set bright display.
Operation procedures when the remote control can't be used.
The operation will be started if the ON/OFF button is pressed.
Ifyou want to stop operation, re-press the button.
CoolingModel
Operatingmode Cooling
IndoorFANSpeed High
SettingTemperature22°C(71.6°F)
RoomTemp._>24°C(75.2°F)
Cooling
High
22°C(71.6°F)
Heatpump Model
21°C(69.8°F)_<RoomTemp.<24°C(75.2°F)
HealthyDehumidification
High
23°C(73.4°F)
RoomTemp.<21°C(69.8°F)
Heating
High
24°C(75.2°F)
Test operation
During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room
temperature and resets in 18minutes.
Duringtest operation,if remotecontrollersignal is received,the unit operates as remotecontrollersets.
Ifyou want to use this operation, Press and hold the ON/OFF button for 3-5 seconds, then the buzzer sound
1 "beep".
Ifyou want to stop the operation, re-press the button.
Owner's Manual 13

OperatingInstructions
1.PresstheSLEEPMODEAUTOBUTTONto setthetimewhenyouwanttheunitto stopautomatically.
2. Thetimer isprogrammedin one-hourincrementsby pressingtheSLEEPMODEAUTO BUTTON1to 7times.
Thesleepmodeis availablefor1to7 times.
Toalterthetime periodin stepsof 1hour,presstheSLEEPMODEAUTOBUTTONwhileaimingatairconditioner.
3.•(Incaseof non-InverterModel)
MakesurethesleepmodeLEDlightsup.
Tocancelthesleepmode,presstheSLEEPMODEAUTOBUTTONseveraltimesuntilthesleepmodeLED lightsoff.
•(In caseof InverterModel)
MakesuretheTimerLEDlightsup.
To cancelthesleepmode,presstheSLEEPMODEAUTOBUTTONseveraltimesuntiltheTimerLED lightsoff.
• Thesleep mode willoperate indoorfan at slow speedin cooling modeand at mediumspeed in heatingmode for
pleasantsleep.
• Art Cool andArt Cool Wide(non-Deluxe)close the lowerdischargepartiallyin sleep modefor pleasant sleep.
In coolingmodeor healthydehumidificationmode:
The settingtemperaturewill rise automaticallytwo times by 1°C(2°F)over nextconsecutive30 minutes[2°C(4°F) in 1
hour]for acomfortable sleep.Nowthis willbe thefinalsettingtemperatureas long as sleepmode isfunctioning.
1. Time can be set only when you press the RESET BUTTON. Having replacing the batteries,
you should press the RESET BUTTON to reset the time. Pressthe Start/Stop button.
2. Press 2nd F button and check if _ icon is on.
3. Press the TIME SETTING BUTTONS until the desired time is set.
4. Pressthe TIME SET/CANCEL BUTTON. ®0_NCEL
M,rej/..q
Check the indicator for A.M. and P.M.
1. Make sureto set current time correctly on the display of the remote controller.
2. Press2nd F button.
3. Press the ON/OFF TIMER BUTTONS to turn timer on or off.
4. Press the TIME SETTING BUTTONS until the desired time is set.
5. To set the selected time, press the TIMER SETTING BUTTONS aiming the remote controller at the
signal receptor.
QC_CEL
To cancel the timer setting
Check if _ icon is off. QCANCEL
Press the TIMER CANCEL BUTTON aiming the remote controller at the signal receptor. _%-_
(The timer lamp on the air conditioner and the display will go off.) _j
Select one of the following four types of operation.
Delayofftimer Delayon timer Delayoffandontimer Delayonandofftimer
14 Room Air Conditioner

OperatingInstructions
The up/down airflow (Vertical airflow) can be
adjusted by using the remote controller.
1. Press the START/STOP BUTTON to start the
unit.
2. Press CHAOS SWING BUTTON.
3. The louvers will swing up &
down automatically.
4. To stop the louver at a desired
angle, press _J!!-_again
-%
The left/right--Horizontal airflow)can be adjusted *_
by using the remote control.
1. Press the START/STOP BUTTON to start the
unit. 1,,
2. Press the HORIZONTAL AIRFLOW Q
DIRECTION BUTTON. _
3. The louvers will swing left & __" [
right automatically. __
4. To stop the louvers at a desired_ilb _
angle, press (_ again.
• By pressingtheCHAOSSWINGBUTTONthehorizontalair flowdirectionischangedautomaticallybasedonthe chaos
algorithmtodistributetheairin the roomevenlyand atthesametimeto makethehuman bodyfeel mostcomfortableas if
enjoyingnaturalbreeze.
• Alwaysusethe remotecontrollerto adjusttheupand downair flow direction.Manuallymovingthe verticalair flow
directionlouverby handcoulddamagethemechanism.Whentheunitis shutoff,the up/downairflowdirectionlouverwill
closetheair outletvent ofthesystem.
This operation circulates the air without cooling or heating. Itcan
be activated by pressing the AIR CIRCULATION BUTTON. Once
the air circulation is activated you can select the air speed by
pressing the INDOOR FAN SPEED SELECTOR BUTTON.
+
CHAOS Air economizes power consumption and prevents overcooling. The fan speed is automatically
changed from high to low or vice versa, depending on the ambient temperature.
• In case of inverter type models where there is no AIR CIRCULATION BUTTON, air circulation can be
operated by pressing the PLASMA BUTTON.
f_ in the situation of power failure.
When power regains after a failure this feature restore the previous operating condition
and the air conditioner will run in the same settings.
This feature is enabled by factory default setting, but you can disable it
by pressing the ON/OFF button for 6 seconds. The unit will beep twice
and the indicator lamp(2) will blink 4 times.
To enable it, press the button again for 6 seconds. The unit will beep
twice and the indicator lamp(l) will blink 4 times.
Owner's Manual 15

MaintenanceandService
CAUTION
Before performing any maintenance, turn off the main power to the system, disconnect the circuit breaker and
unplug the power cord.
Clean the unit with a soft dry cloth. Do not use bleach or abrasives.
ACAUTION
Never use any ofthese
• Water hotter than 40°C(104°F). It may cause deformation and discoloration.
• Volatile substances. They may damage the surface of the air conditioner.
Air Filters
The air filters behind the front panel /grill should be checked and
cleaned once in every 2 weeks or more often if necessary. To
remove the filters see the self explanatory diagrams for each
model type. Clean the filters with a vacuum cleaner or warm
soapy water. If dirt is not easily removed, wash with a solution of
detergent in luke warm water. Dry well in shade after washing and
reinstall the filters back in place.
Plasma Filters
The plasma filters behind the air filter should be checked and
cleaned once in every 3 months or more often if necessary. To
remove the filters see the self explanatory diagrams for each
model type. Clean the filters with a vacuum cleaner. If it is dirty
wash it with water and dry well in shade an install back in place.
Deodorizer Filters
Remove the deodorizer filters behind the air filter and expose
them in direct sunlight for 2 hours.
And then insert these filters into original position.
Removal of Filters
Open the front panel as shown.
Then pull the filter tab slightly forward to remove the air filter.
After removing the air filter remove the plasma and deodorizer filter by slightly pulling forward.
Plasma filter
Front panel
ACAUTION
Don't touch this plasma filter within 10 seconds after opening the inlet grille, it may cause an electric shock.
16 Room Air Conditioner

MaintenanceandService
How to use the front panel
1. Front panel closing
Move the link upward and close the front panel. 2. Front panel removing Raise the link up to hook hanger and remove
front panel forward.
!iiiii¸
The heat exchanger coils and panel vents of the outdoor unit should be checked regularly.
If clogged with dirt or soot, the heat exchanger
and panel vents may be professionally steam cleaned.
Dirty or clogged coils will reduce the operating efficiency of the system and cause higher operating costs.
This is not good for the health and
wastes electricity. Do not let direct sunshine enter
the room when the air conditioner
is in operation.
Adjust the vertical and horizontal
airflow direction to ensure a
uniform temperature in the room.
Avoid opening doors and
windows as much as
possibleto keep the cool
air in the room.
Blockages in the airfilter
reduce the airflow and
lowercooling and
dehumidifying effects.
Clean at least once every
two weeks.
Since windows are kept
closed, it isa good idea
to openthem and
ventilate the room now
andten.
The unit gives its rated
cooling capacity when the
fan speed is high.
This unit has an inbuilt error diagnosis capability. Unit LED((_) will blink in case if thermistor fails.
Please contact your serviceman/dealer in such a situation
Error Display LED ((_)
(once)
Check Point
• Indoor room temperature thermistor open/short.
• Indoor pipe temperature thermistor open/short.
Owner's Manual 17

MaintenanceandService
The air conditioner may be operating abnormally when:
Air
conditioner
does not start
Air
conditioner
does not cool
as it should
• Make sure the air conditioner plug is
pushed completely into the outlet.
• Check the house fuse/circuit breaker box
and replace the fuse or reset the breaker.
• If power failure occurs, turn the mode
control to OFF.
When power is restored, wait 3 minutes to
restart the air conditioner to prevent
tripping of the compressor overload.
• Ifthe voltage is unusually very high or low
theCircuit Breaker will trip.
• Make sure thereare no curtains, blinds, or
furniture blocking the front of the air
conditioner.
• Clean the filter at least every 2weeks.
See the Maintenance and Service section.
• When the air conditioner is first turned on,
you need to allow time for the room to cool
down.
• Check for open furnace floor registersand
cold air returns.
• Make sure they are correct.
• Check and remove such source or turn it
off while using the air conditioner.
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 even if the humidity is low.
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 service person only.
18 Room Air Conditioner

P/No.: MFL39817402