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Owner's Manual 

37

ENGLISH

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 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.

Check the following points before requesting repairs or service.... If the malfunction persist, please contact your dealer.

The air conditioner does not
operate.

The room has a peculiar odor. 

It seems that condensation 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.

Filter sign lamp (LED) is ON.

Remote control display is faint, or
no display at all.

The error code is occurred after
lightning struck

• Have you made a mistake in timer operation?

• 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.

• Cleaning the filter, press the Timer button and 

button of wired remote

controller at the same time for 3 sec.

• Has the circuit breaker been tripped?

• Are the batteries inserted in the opposite (+) and 

(-) directions? 

• This product has been applied to the over current protection circuit.

Error can occur, but it is normal behavior. 
After few minutes, It will operate normally.

                 Case                                                                      Explanation

Maintenance and Service

Troubleshooting Tips! Save time and money!

Summary of Contents for 456394

Page 1: ...ference P NO MFL67163901 www lg com TYPE 4 WAY CEILING CASSETTE The equipment complies with requirements of the Technical Regulation in terms of restrictions for the use of certain dangerous substances in electrical and electronic equipment KZ O 02 0561 ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH ΕΛΛΗΝΙΚΆ PORTUGUÊS DUTCH ...

Page 2: ...eplacement 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 What to do before operation 6 Operation Indication Lamps 6 Wired Remote Controller 7 Wireless Remote Controller Accessory 8 Standard Operation Standard Cooling 9 C Operating instruc...

Page 3: ...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 ins...

Page 4: ...ially 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 ri...

Page 5: ... 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 Replac...

Page 6: ...onds to your system 1 Unit with remote controller 2 Unit without remote controller when used as simultaneous operation Multi system Pair system or simultaneous operation system 3 6 2 8 Lights up during the system operation Filter Sign Lights up after 2400 hours from the time of first operating unit Timer Lights up during Timer operation Defrost Mode Lights up during Defrost Mode or Hot Start opera...

Page 7: ...TE OPERATION INDICATION SCREEN SET TEMPERATURE BUTTON FAN SPEED BUTTON ON OFF BUTTON OPRATION MODE SELECTION BUTTON WIRELESS REMOTE CONTROLLER RECEIVER Some products don t receive the wireless signals AIR FLOW BUTTON SUBFUNCTION BUTTON FUNCTION SETTING BUTTON VENTILATION BUTTON RESERVATION UP DOWN LEFT RIGHT BUTTON To check the indoor temperature press button ROOM TEMPERATURE BUTTON SETTING CANCEL...

Page 8: ...h a curtain or etc so as to prevent the abnormal operation ex electronic quick start ELBA inverter type fluorescent lamp The wireless remote controller do not operate the vane angle control 4Way Type For more details refer to the Wireless Remote Control Accessory manual The actual product can be different from above contents depending upon model type The wireless remote controller does not operate...

Page 9: ...s button to select Cooling operation mode 2 Adjust the desired 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 3 Setting Temp Range 18 C 30 C 64 F 86 F It cools the room by comfortable and clean wind ...

Page 10: ...oor 1 Press button to select Heating mode To check the indoor temperature press the room temperature button 2 Adjust the desired temperature by pressing buttons When setting the desired temperature lower than room temperature there is only ventilation wind 3 What is Power Cooling Desired temperature Po actually 18 C Wind flow power wind Wind direction fix to air cooling position Partial product ha...

Page 11: ... It removes humidity while air cooling weakly In rainy season or high humidity climate it is possible to operate simultaneously dehumidifier and cooling mode to remove humidity effectively The menu item of wind powerfulness might not be partially selected according to the product Press button to turn on the indoor 1 Press button to select Auto Changeover Mode 2 The setting temperature as the right...

Page 12: ... automatic When running ventilation compressor of AHU doesn t work 3 Standard Operation Fan Mode It blows the air as it is in the indoor not the cold wind Ventilation drive does not release cool wind but general fan Because it releases the wind that has no temperature difference from the room it functions to circulate the inside air The menu item of wind powerfulness might not be partially selecte...

Page 13: ... the right for cooling and heating model 3 For the case of cooling exclusive as the picture on the right you can adjust the temperature from hot to cold from 2 to 2 based on 00 4 When cold When cool When appropriate When warm When hot Standard Operation Auto Operation Mode During operating Auto Operation mode We can use the FAN SPEED button We can change manually to other operation mode ...

Page 14: ...ally selected according to product function Please refer to product manual for product s detailed function 1 Please set desired wind direction by pressing button You can select wind direction of comfortable wind Up Down and Right Left Right Left Up Down by pressing button Partial item of wind directions might not be selected according to product function Please refer to product manual for product ...

Page 15: ...mperature Please increase the desired temperature 1 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 1 Temperature Setting Room Temperature Check For air cooling drive from 18 C to 30 C and for heat...

Page 16: ...drive button at ventilation drive Sub function Plasma Purification Repeat pressing button until icon flash The method to setup cleaning air 1 Operate or cancel Plasma Purification function by pressing button icon appears disappears on display part up to selection 2 After setting press button to exit 3 After setup it automatically gets out of setup mode if there is no button input for 25 seconds Wh...

Page 17: ...by using button setup icon blinks and child lock function is setup if pressing button at that time 2 When cancelling lock function if moving to cancel icon by pressing button and then pressing button child lock function is cancelled 3 Press button to exit After setup it automatically gets out of setup mode if there is no button input for 25 seconds When exiting without pressing set button the mani...

Page 18: ... button to complete and active the setting process 3 Press button to exit or system will automatically release without any input after 25 seconds When exiting without pressing set button the manipulated value is not reflected 4 Change temperature is the function to setup air cooling and heating drive automatically changeable according to the temperature at artificial intelligence drive mode ...

Page 19: ...ill descents to the desired position move to stop icon suing button and press button to stop up down grill 3 When filter cleaning is finished fix the filter to the up down grill move to ascent icon using button and press button to ascent up down grill 4 Press button to exit After setup it automatically gets out of setup mode if there is no button input for 60 seconds When exiting without pressing ...

Page 20: ... repeatedly until the is flashing 1 When the is flashing press the to clear this display 2 When filter is covered by dust it will reduce cooling heating efficiency and accumulate more electric power Therefore do clean the filter whenever cleaning time is expired Filter cleaning indication is automatically cancelled without the separate cancellation after certain period of time ...

Page 21: ...selecting standard for Vane number the wind angle does not move 3 Set the wind angles for the remaining vanes as the same as above There are products with vanes with no 1 and no 2 only according to the product types 4 Press button to exit After setup it automatically gets out of setup mode if there is no button input for 60 seconds When exiting without pressing set button the manipulated value is ...

Page 22: ...up menu Time setup icon is indicated at that time and date blinks at current time indication area Ex Changing Current Time as Monday AM 10 20 1 Press key to adjust the current day 2 Press key to move to AM PM setting mode the AM PM segment will flash 3 Setting AM PM value by pressing button 4 Press button to move to Hour setting mode the Hour segment will flash 5 Setting Hour value by pressing but...

Page 23: ... will flash 7 Setting Minute value by pressing button 8 Press button to finish 9 In the process press button to release and exit from setting mode In case of exit with incomplete information it will return to the previous setting When exiting without pressing set button the manipulated value is not reflected 10 ...

Page 24: ...servation time 2 Press button to finish setting 3 Press button to exit After setup it automatically gets out of setup mode if there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected 4 You can set the reservation conveniently in the units of 1 hour from 1 hour to 7 hours When simple reservation setup product automatically runs or stops...

Page 25: ...p two reservations weekly reservation 1 and weekly reservation 2 for a day 3 Please move to date setup part by using button If date indication blinks please setup date You can setup date from Monday to Sunday 4 Please move to AM PM setup part of turning on by using button 5 Please move to hour setup part of turning on by using button It is the part to setup the time at which air conditioner is tur...

Page 26: ...tion setup for the day that you set is finished 12 If you setup with the method identical with above by selecting the day that you d like to setup it operates weekly reservation If you setup both turning on reservation time and turning off reservation time identically it doesn t operate reservation drive 13 Weekly reservation explanation Turning on time Under bar the indication that there is weekl...

Page 27: ...at the lower part of LCD screen 5 If finishing sleep reservation setup air conditioner product operates sleep drive and stops after the time that is set 6 Sleep reservation is the function of air conditioner to run and stop after certain period of time at sleep mode before sleep When connected to a ventilation product and set the sleep reservation when it goes to the sleep mode after the set time ...

Page 28: ...setting mode segment flashing 2 Press button to adjust AM PM setting 3 Press button to Hour setting mode When the Hour icon flash please setting time The setting range is within 1 12 4 Press button to shift to Minute setting mode When the Minute icon flash please setting minute the setting range is within 00 59 5 Press button to finish setting 6 Automatically turned On at reserved time that you se...

Page 29: ...f there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected If reservation is set turned on indication shows up at the lower part of LCD screen and air conditioner product runs at the time that is set If reservation is cancelled turned on indication disappears 7 ...

Page 30: ...etting mode segment flashing 2 Press button to adjust AM PM setting 3 Press button to shift to Hour setting mode When the Hour icon flash please setting time The setting range is within 1 12 4 Press button to shift to Minute setting mode When the Minute icon flash please setting minute the setting range is within 00 59 5 Press button to finish setting 6 Automatically turned Off at reserved time th...

Page 31: ... there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected If reservation is set turned off indication shows up at the lower part of LCD screen and air conditioner product runs at the time that is set If reservation is cancelled turned off indication disappears 7 ...

Page 32: ...tton 3 Please appoint or cancel holiday by using or button For example when you setup Monday Friday to holiday Monday Friday letter disappears 4 Please press button if finishing holiday setup If it comes to appointed holiday air conditioner automatically stops Once you setup holiday appointment until before you cancel holiday setup air conditioner automatically stops within one hour even though yo...

Page 33: ...n it returns to air condition mode 3 Pressing button in general ventilation mode will change airflow speed Pressing airflow speed button will change the mode in the order of weak strong extra strong If CO2 sensor is installed it can select from weak strong very strong automatic 4 Changing back to air conditioner mode 1 Automatic Conversion when no button is pressed for 15 seconds or longer it auto...

Page 34: ...cause deformation and or discoloration Volatile substances Could damage the surfaces of the air conditioner Benzene SCOURING CLBARGER SINNER 1 Remove the Air filters Take hold of the tab and pull slightly forward to remove the filter CAUTION When the air filter is to be removed do not touch the metal parts of the indoor unit It may cause an injury 2 Clean dirt from the air filter using a vacuum cl...

Page 35: ...Dry the PLASMA filter in the shade for a day Especially the humidity must be removed perfectly on this parts 4 Note the cuts of electric discharge lines 5 Re install the PLASMA filter to the original position Replacement Recomended use period About 2 years 1 Open front panel and remove air filter 2 Remove air purifying filter 3 Insert new air purifying filter 4 Reinsert air filter and close front ...

Page 36: ...hem and ventilate the room now and then When air conditioner is not going to be used for a long time 1 Operate the air conditioner at the following settings for 2 to 3 hours Type of operation Fan operation mode Refer to page Fan Mode This will dry out the internal mechanisms 2 Turn off the breaker CAUTION Turn off the breaker when the air conditioner is not going to be used for a long time Dirt ma...

Page 37: ... 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 ver...

Page 38: ...38 Ceiling Cassette Type Air Conditioner ...

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