LG MFL42619114 User manual

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LG Ceiling Cassette-Type
Air Conditioner
OWNER'S MANUAL
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air conditioner.
_re 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.
•Installation work must be performed in accordance
with the National Electric Code by qualified and
authorized personnel only.
2Air Conditioner

Safety Precautions
Topreventinjurytothe useror otherpeopleandpropertydamage,thefollowinginstructionsmustbefollowed.
• Incorrectoperationduetoignoringinstructionwillcauseharmor damage.Theseriousnessis classifiedby
thefollowingindications.
I _k WARN I N (_ This symbol indicates the possibility of death or serious injury. 1
CAUTION This symbol indicates the possibility of injury or damage.
• Thereisariskofelectricshock,
• Thereisriskoffireorelectricshock,
• Thereisriskoffireorelectricshock.
• Itmaycauseproducttofall,
• Incorrectrefrigerantusedcanpreventthe
normaloperationoftheunit,
• Thereisriskoffireandelectricshock.
, WARNING
.Thereisriskoffireorelectricshock.
.Thereisriskoffireorelectricshock.
.Thereisriskoffireorelectricshock.
•Thefailingoutdoorunitcancausedamageor
injuryorevendeathofaperson.
.Otherwiseit maycauseafireorelectrical
shock.
.Thereisriskoffire,failureoftheproduct,or
electricshock.
•Otherwiseitcancauseelectricshockorfire.
•Thereisriskoffireorelectricshockdueto
dust,wateretc.
•Thereisriskoffire,electricshock,explosion,
orinjury.
.Thereisriskoffireoreletricshock.
•Thereisriskofelectricshockorfire.
•Thereisriskoffire.
Owner's Manual 3

Safety Precautions
• Improperorlooseconnectionscancause
heatgenerationorfire.
•Anchargedcapacitorcancauseelectrical
shock.
•Oxygendeficiencycouldoccurandhence
harmyourhealth.
• Oxygendeficiencycanoccurandhenceharm
yourhealth.
•Thiscouldresultinpersonalinjuryand
productdamage.
•Childrenmayplaywiththemandcause
injury.
•Otherwisetheunitmayfallandcausesevere
injury.
, Thereisriskofphysicalinjury,electricshock,
orproductfailure.
•Thereisriskofelectricshock.
•Thereisriskoffireorelectricshock.
•Dirty,looseorbrokenpowerplugcan
causeelectricshockorfire.
• Theuseofinappropriatepartscancausean
electricalshock,excessiveheatgenerationor
fire.
•Thereisriskoffireorelectricshock.
•Avoidpersonalinjury.
•Toavoidvibrationornoise.
•Thereisriskofelectricshockorfire.
• Thereisriskofproductdamageorfailure,or
unintendedoperation.
• Thereisriskoffireorelectricshock.
,Donotusethetelephoneorturnswitchesonoroff.Thereisriskof
explosionorfire.
, ,CAUTION
4 Air Conditioner
• Itmaycausecorrosionontheproduct.
• Itmaycauseaproblemforyourneighbors
andhencedispute.
°Abadconnectionmaycausewaterleakage.
• Lowrefrigerantlevelsmaycausefailureof
product.

•Thereisriskofdamageorlossofproperty.
•ThereisriskofpersonaIinjury.
•Therearesharpandmovingpartsthatcoutd
causepersonalinjury.
•Thecondensedwaterinsidecanspill.
•Thechemicalsinbatteriescouldcauseburns
orotherhealthhazards.
•Thiscouldharmtoyourhealth.
oItmaycauseproductfailure.
oThereisriskofpersonalinjuryandfailureof
product.
,Sharpedgescouldcauseinjury.
Safety Precautions
, Ifairenterstherefrigerantsystem,an
excessivelyhighpressureresutts,causing
equipmentdamageorinjury.
,Thereisriskoffireorproductfailure.
•Thechemicalsinbatteriescouldcause
burnsorotherheaithhazard.
, Itisnotsanitaryandcouldcauseserious
healthissues.
•Thereisriskoffire,electricshock,ordamage
totheplasticpartsoftheproduct.
•Adirtyfilterreducestheefficiency.
•Therefrigernatgascancausefrostbite(cold
burn)
•Otherwiseitcanbeharmfullforyourhealth.
•Theymayburnorexplode.
•Moisturemaycondenseandwetordamage
furniture.
•Becarefulandavoidpersonalinjury.
Owner's Manual 5

Product Introduction
Here is a brief introduction of the indoor and outdoor units. Please see the information specific to your indoor
unit type.
[CeilingCassetteType]
Cabinet
Air Discharge
Front Panel
Signalreceiver \
Air Inlet
Air intake vents
Air
Base plate
g wire
Connection pipe
Drain hose
_I_The figure can be changed according to model.
6 Air Conditioner

Product Introduction
[Ceiling Cassette Type]
On/Off
[] Filter Sign
(_ Timer
Defrost Mode
• Forced
Lights up during the system operation.
Lights up after 2400 hours from the time of first operating unit.
Lights up during Timer operation.
Lights up during Defrost Mode or Hot Start operation.(Heat pump model only)
To operate the unit when the remote control can't be used
for any reason.
*Hotstart 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 of iceon the heat
exchanger coils to maintain the efficiency.
1.The signal receiver is inside the unit.
2. Aimthe remotecontrollertowardsthe unitto operateit.
Thereshould not beany blockagein between.
Ceiling Cassette Type
Owner's Manual 7

Product Introduction
E! OPERATION INDICATION
SCREEN
El SET TEMPERATURE Button
I_1 WIRELESS REMOTE
CONTROLLER RECEIVER
• Some productsdon't receive the
wireless signals.
VENTILATION Button
El OPERATION MODE SELECTION
Button
SUBFUNCTION Button
_i_ FUNCTION SETTING Button
EXIT Button
El ON/OFF Button
_]_ ROOM TEMPERATURE Button
_] FAN SPEED Button
AIR FLOW Button
_]_ RESERVATION/TIME SETTING
Button
_] SETTING/CANCEL Button
UP, DOWN, LEFT, RIGHT Button
RESET Button
r_'[*)tq
Display temperature can be different from actual room temperature if the remote controller is
installed at the place where sun-rays are falling directly or the place nearby heat source.
The actual product can be different from above contents depending upon model type.
8 Air Conditioner

Product Introduction
_11
G
_@ 6
_//o_ _i _P_sMArE P oN,oF_
!i_ii!i(iiiiiii!!ili_i_ill_I_IIIIIILI_;;:I_,,,ii_
.'71.
_Operation Mode
43 J
43
•Cooling Model(43), Heat Pump Model(_l.)
ill PLASMA Button (Optional)
Used to start or stop the plasma-purification
function.
_'_ JET COOL Button
Speed cooling operates super high fan speed.
IOPERATION MODE SELECTION Button
Used to select the operation mode.
_]l FUNCTION SETTING Button
Used to set or clear Auto Clean or Amart Clean.
LCD LUMINOSITY Button (Optional)
Used to adjust LCD luminosity
I_1 SMART CLEAN Button (Optional)
Used to start or stop Smart Clean.
CLEAR ALL Button
Used to clear all timer.
Ir_ ROOM TEMPERATURE SETTING Button
Used to select the room temperature.
I_l ON/OFF Button
Used to turn on/off the unit.
i]_ INDOOR FAN SPEED SELECTION Button
Used to select fan speed in four steps low,
medium, high and chaos.
i_] UP/DOWN AIRFLOW Button
Used to stop or start louver movement and set
the desired up/down airflow direction.
LEFT/RIGHT AIRFLOW Button(Optional)
Used to set the desired left/right(horizontal)
airflow direction.
_] TIMER AND TIME SETTING Button
Used to set the time of starting or stopping and
sleeping operation.
_] ROOM TEMPERATURE CHECKING Button
Used to check the room temperature.
_r_ oc/oF SWITCH Button
Used to switch temperature reading from
Celsius to Fahrenheit.
RESET Button
Used to reset the remote controller.
Owner's Manual 9

Operating Instructions
1.Wired Remote Controller
Press @ button to turn on the indoor.
2
3
Press _ button to select Cooling operation mode. %
TEMP
Adjust _thedesired temperature by pressing @ @ buttons. _,%
Press _ button to check the Room temperature.
When setting the desired temperature higher than room
temperature, only ventilation wind is blow out instead of cooling
wind.
o**oSetting Temp Range •18°C~30°C.
2. Wireless Remote Controller
#
............................:,,t2_..........
PASMA O_JOF_ PressMODEbuttontoselectCoolingMode. MODE
SetthedesiredtemperaturebypressingTEMPbutton._ Toraisethetemperature
PressROOMTEMPERATURECHECKINGbuttonto
check the room temperature. When setting the desired _o lowerthetemperature
temperatureishigherthanroomtemperature,cooling
windisn'tblowout.
÷ SettingTemp.Range: 18~30°0(64~86°F)
10 Air Conditioner

Operating Instructions
Itmakes the room cool using pleasant and fresh air quickly
1.Wired Remote Controller
Press _ button to turn on the indoor.
2Press _ button to select Cooling operation mode. /_
3Press _ button continuously until "Po" displayed.
2. Wireless Remote Controller
PLASMA TEMP ON/OF_
G t¢®
Press the ON/OFF button.
The unit will respond with beep sound,
ON/OFF
Press MODE button to select Cooling Mode. MODE
Press the JET COOL button. The unit will operate in super
high fan speed in cooling mode.
÷ Wall mounted models operate power cooling mode for
30 minutes.
JET COOL
fan speed in cooling mode.
JET COOL FAN SPEED
or or
Owner's Manual 11

Operating Instructions
1.Wired Remote Controller
Press @ button to turn on the indoor.
2Press I_ button to select Heating mode.
3Adjust the desired temperature by pressing (_) (_) buttons.
When setting the desired temperature lower than room temperature,
there is only ventilation wind.
TEMP
o;oSetting Temp Range •16°C~30°C.
2. Wireless Remote Controller
I_ UU
ON /OFF
TEMP _
AIR FLOW
Press the ONIOFF button.
The unit will respond with beep sound.
ON /OFF
Press MODE button to select Heating Mode. MOD%
3Set the desired temperature by pressing TEMP button.
Press ROOM TEMPERATURE CHECKING button to check the roorr
temperature.
When setting the desired temperature is lower than room
temperature, heating wind isn't blow out.
Toraisethetemperature
Tolowerthetemperature
÷Setting Temp. Range in
Heating Mode : 16~30°C
(60°F~S6°F)
Set thefan speed again. You can select the fan speed in four
steps-low, medium, high, or chaos. Each time the button is pressed,
the fan speed mode is shifted.
FAN SPEED
12 Air Conditioner

Operating Instructions
1.Wired Remote Controller
4 Press _ button to turn on the indoor.
I
2Press [_ button to select Dehumidification mode
The temperature setting can not be adjusted during operation this
mode.
3Press the Ii_lil button to select airflow rate SLO ....LO ' MED ....HI
....(NONE) .... |
(The lists depends on products function)
o:oNONE " Power level of Fan Speed
%
Owner's Manual 13

Operating Instructions
2. Wireless Remote Controller
....,'2;_
PLASMA ON /OFF
MODE AIR FLOW
Press the ON/OFF button.
The unit will respond with beep sound.
ON /OFF
2Press MODE button to select Dehumidification Mode.
MODE
Set the fan speed. You can select the fan speed in four steps - bow,
medium, high, or chaos. Each time the button is pressed, the fan
speed mode is shifted.
FAN SPEED
During Dehumidification Mode
• If you select the dehumidification mode onthe operation selection button, the indoor unit starts to run the
dehumidification function, automatically setting the room temp. and air volume to the best condition for
dehumidification based on the sensed room temp.
In this case, the setting temp. is not displayed in the Remote Controller and you are not able to control the
room temp. either.
• During the healthy dehumidification function, the airvolume is automatically set according to the algorithm
responding tothe current room temp. and makes the room condition healthy and comfortable even in the
high humidity season.
Inrainy season or high humidity climate, it is possible to operate simultaneously dehumidifier and
cooling mode to remove humidity effectively.
14 Air Conditioner

1.Wired Remote Controller
Operating Instructions
Press @ button to turn on the indoor.
Press _ button to select Auto Changeover Mode.
The setting temperature as the right side picture can be set in both
cooling/heating model.
o:oSetting Temp Range • 18°C~30°C.
2. Wireless Remote Controller
_ _3n c
CC.u °
i!!!:i!!:.i!!!!!:_!i',.i!-
......20E/
PLASMA ON /OFF
TEMP
r- 4,
CLEAR ALL RhSETI
Pressthe ON/OFF button. The unit will respond with ON/OFF
beep sound.
Press MODE button to select Auto Changeover
Mode.
MODE
Set the desired room temperature _._;_,,......... _,_ °"'/
• _e_ng/emp. _ange in ,o,u_o _
Changeover Mode II:_J
You can select the fan speed in four stepss-low,
medium, high and chaos.
Each time the button is pressed, the fan
speed mode is shifted.
FAN SPEED
•)
IDuring Auto Mode
changeover
The air conditioner changes the operation mode automatically to keep indoor temperature. When room
temperature vary over +2°C(4°F) with respect to setting temperature, air conditioner keeps the room
temperature within +2°C(4°F) with respect to setting temperature byauto changeover mode.
Owner's Manual 15

Operating Instructions
1.Wired Remote Controller
Press _ button to turn on the indoor.
2 Press I_ button to select Fan mode
Press the _ button to select airflow rate SLO ....LO .... MED
.... HI ....(NONE) ....
(The lists depends on products function)
2. Wireless Remote Controller
r_te_z_
*_2DO
pLASMA ON /OFF
Press the ON/OFF button.
The unit will respond with beep sound.
ON/OFF
Press MODE button to select Fan Mode. MODE
%
Set the fan speed again. You can select the fan speed in four
steps-low, medium, high, or chaos. Each time the button is pressed,
the fan speed mode is shifted.
FAN SPEED
Natural Wind by the chaos Logic
•For more fresh feeling than other fan speed, press the indoor Fan Speed Selector and set to chaos mode. In
this mode, the wind blows like natural breeze by automatically changing fan speed according to the chaos
logic.
• The outdoor compressor doesn't work.
Have a function to circulate the indoor as it sends out the air that doesn't have much temperature difference
with indoor.
16 Air Conditioner

We can simply adjust the desired airflow rate
Operating Instructions
1.Wired Remote Controller
Press _ buttons to set the desired airflow direction.
• _ ....(NONE) .... _ :_ ...._ ....
• Display of these lists depends on products function.
• NONE " Released swirl
2. Wireless Remote Controller
Up/Down Airflow Direction Control
1. Pressthe ON/OFF buttonto start the unit.
2. Press UP/DOWN AIRFLOW button and the louverswill swing up and down.
Press the UP/DOWN AIRFLOW button again to set thevertical louver at thedesired airflow direction.
Left/Right Airflow Direction Control
1. Press the ON/OFF button to start the unit.
2. Press the LEFT/RIGHT AIRFLOW button and the louvers will swing left and right, Press the
Horizontal Airflow Direction Control Button again to set the horizontal louver at the desired
airflow direction.
<Ariflow Setting Table>
Symbol Description
vane pairedopend cross
SwriI m
Up,Down:Vane movefrom upto downautomaticallyand continuously
_:_ Left.Right: move rightautomatically continuously
Vane from left to and
¢ Some functions may not be operated and displayed depending on the product type.
Owner's Manual 17

Operating Instructions
1.Wired Remote Controller
We can simply adjust the desired temperature.
• Press the (_) (_) buttons to adjust the desired temperature.
2
(_) Increase 1°C per one time pressing
@ Decrease 1°C per one time pressing
Room temp: Indicate the current room temperature.
Set temp: Indicate the temperature that user want to set.
Depend on what kind of controller, the desired temperature can be adjusted at
0.5°C.
Cooling operation: The cooling mode doesn't work if desired temperature is
higher than room temperature Please lower the desired temperature.
Heating operation: The heating mode doesn't work if desired temperature is
higher than room temperature Please lower the desired temperature.
Whenever press __j button, the room temperature will be displayed within 5
seconds.
After 5 seconds, it turns to display the desired temperature.
Because of location of remote controller, the real room temperature and the this
displayed value can be different
18 Air Conditioner

Operating Instructions
2. Wireless Remote Controller
>_
_0 It'ln c
tO.u"
iii?,iii!iiiii!iiiiiii:>
PLASMA ON /OFF
TEMP _
_L_L_ _o
We can simply adjust the desired temperature
• Press the buttons to adjust the desired temperature
TEMP
• Increase 1°Cor 2°F per one time pressing
• Decrease 1C or 2_Fper one time pressing
Roomtemp: Indicate the current room temperature
Set temp: Indicate the temperature that user want to set
<Cooling Mode>
The cooling mode doesn't work if desired temperature is higher than
room temperature Please lowerthe desired temperature
<Heating Mode>
The heating mode doesn't work if desired temperature is lower than room
temperature Please increase the desired temperature
Whenever press button, the room temperature will be displayed within 5
seconds.
After 5 seconds, it turns to display the desired temperature.
Because of location of remote controller, the real room temperature and
the this displayed value can be different.
• J
Owner's Manual 19

Operating Instructions
1.Wired Remote Controller
Repeat pressing _ button until _ icon flash.
2Operate or cancel Plasma Purification function by pressing
_ button.
(_ icon appears/disappears on _ display part up
to selection )
After setting, press _ button to exit.
2. Wireless Remote Controller
f
;f-_Olk_]==l=l_
Press the ON/OFF button.
The unit will respond with beep sound,
ON /OFF
Press the PLASMA button. Plasma Purification
will start when the button is pressed and stop
when the button is pressed again.
PLASMA
Purification only
f
If you press the PLASMA button, Plasma Purification operates.
PLASMA
• Plasma filter is a technology developed by LG to get rid of microscopic contaminants in the intake air
generating a plasma of high charge electrons. This plasma kills and destroys the contaminants
completely to provide clean and hygienic air,
• Thisfunctioncan beusedin any operationmodeandanyfanspeedcan beusedwhileplasmafilter isfunctioning.
When turn the machine off, Plasmafunction is off (And also off when restart indoor)
Incase of such model that has no Plasma sub function, it doesn't appear when pressing _ button.
20 Air Conditioner