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— answers from the official manualAnswers from the official manual.
Common questions
Common Questions
19 totalWhat should I do if the remote controller display shows 'CH'?
'CH' flashing in the remote controller display indicates that a problem has occurred with the air conditioner. You should contact your dealer for assistance when this self-diagnosis code appears.
How often should I clean the air filter on the LB-H0850QC?
The air filters should be checked and cleaned once every 2 weeks, or more often if necessary. Clogged air filters reduce airflow, lower cooling and dehumidifying effects, and can waste up to 6% of the electricity used to operate the air conditioner.
How do I properly clean the air filter?
Clean the filter with a vacuum or warm, soapy water. If very dirty, wash with a solution of detergent in lukewarm water, but do not use hot water of 50°C or more as it may deform the filter. After washing, dry the filter well in the shade before re-installing it.
Why does the air conditioner not start immediately when restarted?
The air conditioner will not operate for about 3 minutes when restarted — this is a built-in protector for the mechanism. Simply wait about three minutes and operation will begin.
How do I activate the Child Lock function on the remote controller?
Press the Timer button and Minute Set button simultaneously for three seconds to activate Child Lock mode. The display will show 'CL', and pressing any other button will not change the mode while Child Lock is active. To cancel Child Lock, press the same two buttons again for three seconds.
What should I do before leaving the air conditioner unused for a long period of time?
Before extended periods of non-use, operate the air conditioner in Air Circulation mode for 2 to 3 hours to dry out the internal parts. Then turn off the circuit breaker, as dirt may collect inside the unit and could cause a fire.
Show 13 more questions
Is it safe to clean the air conditioner with water?
Why is there a cracking sound coming from the air conditioner during operation?
What could cause the air conditioner to not cool effectively?
Can installation and repair of the LB-H0850QC be done by the customer?
What should I do if the air conditioner doesn't cool effectively?
Why does my air conditioner make cracking sounds?
What does it mean when 'CH' flashes on the remote controller display?
How do I set up the weekly timer function?
How do I activate the Child Lock function?
What should I do if condensate seems to be leaking from the air conditioner?
How should I prepare the air conditioner if I won't be using it for a long time?
What water temperature should I use to clean the air filter?
Why doesn't the air conditioner operate for about 3 minutes when I restart it?
Full Manual
15 pages
English
Important
Please read through this manual. It contains valuable information about your air conditioner. This manual may help save time and money by explaining proper product maintenance and preventing improper use.Precautions
Pay close attention to precautions in order to prevent potential hazards and damage from misuse or improper installation. LG is not responsible for any damages caused by misuse of the product.Lg
Ceiling Duct-Type Air ConditionerOwner'S Manual
Lg
Model: Lb-H0850Qc
F or Your Records R ead This Manual
Caution
Write the model and serial numbers here: Model # Serial # Also note down the following : Dealer's Name Date Purchased 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. ? 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. ? Installation work must be performed in accordance with the national wiring standards by authorized personnel only.
Warning
Warning
Warning
Caution
Never Do This Always Do ThisWarning
Warning
Precautions Safety Precautions 3English
To prevent injury and property damage, follow these instructions. Incorrect operation due to ignoring instructions will cause harm or damage, the seriousness of which is indicated by the following symbols. Do not install, remove and reinstall the unit by yourself. ? Improper installation will cause water leakage, electrical shock, or fire. Please consult authorized dealer for the installation work. Please note fault caused by improper installation is not covered by warranty. ? Unit must be installed in an easily accessible area. Any additional cost required to hire a special equipment to service the unit will be the responsibility of the customer. Do not damage or use an unspecified power cord. ? It will cause electrical shock or fire. ? If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly qualified person in order to avoid a hazard. Do not operate switches with wet hands. ? It may cause electrical shock. Plug in the power plug properly. ? Otherwise, it will cause electrical shock or fire due to heat generation. Do not operate or stop the unit by inserting or pulling out the power plug. ? It will cause electrical shock or fire due to heat generation. Do not insert your finger or stick, etc. into the air inlet/air outlet. ? Since the fan rotates at high speed, this may cause an injury or damage the unit. Do not expose the skin to cool air directly for a long time. ? This could damage your health. When an abnormality (smell of burning, etc) occurs, stop the air conditioner, and turn off the breaker. ? If the unit continues to be operated in an abnormal condition, it may cause a fire, trouble, etc. In this case, consult your dealer. Repair or relocation should not be done by the customer. ? If this is done in correctly, it may cause a fire, electric shock, injury by dropping of the unit, water leakage, etc. Consult your dealer. This symbol shows the possibility of death or serious injury. This symbol indicates the possibility of injury or damage to property. Installation precautions
Caution
Caution
Caution
Caution
4 Do not clean the air conditioner with water. ? Water may enter the unit and degrade the insulation. It may cause an electric shock. Ventilate well when used together with a stove, etc. ? An oxygen shortage may occur. When the unit is to be cleaned, switch off, and turn off the breaker. ? Since the fan rotates at high speed during operation, it may cause an injury. Do not put a pet or house plant where it will be exposed to direct air flow. ? This could injure the pet or plant. Do not apply an insecticide or flammable spray. ?Itmaycauseafireor deformation of the cabinet. Do not leave on installation stand which is damaged. ? The unit may drop or fall down and cause an injury. Do not put a stove, etc. where is exposed to direct air flow. ? It may cause imperfect combustion. When the unit is not going to be used for a long time, turn off the breaker. ? It may cause an injury. Do not step on the outdoor unit and do not put anything on it. ? It may cause an injury through dropping or falling down. Do not operate for a long time in high humidity, e.g. leaving a door or window open. ? In the cooling mode, if it is operated in a room with high humidity (80%r.h. or more) for a long time, water condensed in the air conditioner may drop and may wet and spoil furniture, etc. Do not step onto an unstable bench when attaching/detaching the panel. ? It may case an injury, etc. by falling down. Do not use for special purposes. ? Do not use this air conditioner to preserve precision devices, food, animal, plants and art objects. It may cause deterioration of quality, etc. If the supply cord is damaged, it must be replaced by a special cord or assembly available from the manufacturer of its service agent. ? If will cause electrical shock or fire. When the air filter is to be removed, do not touch the metal parts of the indoor unit. ? It may cause an injury. Do not insert hands through vanes when the air conditioner is operating. ? It will cause an injury by the rotating blower. ? Contact the authorized Service technician for repair or maintenance of this unit. ? Contact the authorized Service technician for installation of this unit. ? The air conditioner is not intended for use by young children or infirm persons without supervision. ? Young children should be supervised to ensure that they do not play with the air conditioner.
Operating Instructions Operating Instructions 5 16 15 14 13 12 11 10 Name and Function of Remote Controller Operation display Displays the operation conditions. On/Off Button Operation starts when this button is pressed, and stops when the button is pressed again. Set Temperature Button Used to set the temperature when the desired temperature is obtained. FAN Operation Button Used to circulate room air without cooling or heating. Operation Mode Selection Button Used to select the operation mode. lAuto Operation Mode. lCooling Operation Mode. lSoft Dry Operation Mode. Humidify Button (Optional) Timer Set Button Used to set the timer when the desired time is obtained. Week Button Used to set a day of the week. Program Button Used to set the weekly timer. Holiday Button Used to set a holiday of the week. Time Set Button Used to set the time of the day and change the time in the weekly timer Function. Set and Clear Button Used to set and clear the weekly timer. Reset Button Used to set the current time and clear the setting time. 6 5 4 3 2 1 Remote Controller Room Temperature Checking Button Used to check the room temperarure. 7 Heater Button (Optional) 8 9 Timer Cancel Button Used to cancel the timer. Timer Cancel Program Week Holiday
Set/Clr
Hour MinReset
15 14 13 12 11 10 98 3 16 7 6 5 4 2 Signal receptor Cooling Model 1Operation
Set Temp
Sub Function
Time Room TempMn
Or
°C
Filter Defrost Heater Preheat Out door Operation unit Timer On Off Setno.Time010305070911131517192123 Program set Sun Mon Tue Wed Thu Fri Sat 88English
6
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Fan Speed
Sub Function
Set Temp
TimeOperation
Fan Speed
Sub Function
Set Temp
TimeOperation
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Set Temp
TimeOperation
Fan Speed
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Set Temp
Hour Min WeekReset
Set the Current Time and a day of the Week 1 Press the ' ' button. Each time the button is pressed, the number is changed from to . You can set the number of the current hour. 2 Press the ' ' button. Each time the button is pressed, the number is increased from to . You can set the number of the current minute. 3 Press ' ' button. Each time the button is pressed, a day of the week is shifted from sunday to saturday. You can set the day of the week. 4 Press the ' ' button. If you want to reset the current time and a day of the week, click the Reset button. Hour Min WeekReset
7 Week Program
Set/Clr
Min HouOperation
Fan Speed
Sub Function
Set Temp
Program set 010305070911131517192123 TimeOperation
Fan Speed
Sub Function
Set Temp
010305070911131517192123 Time Program Weekly Programming 4 Press the Program button again to finish weekly programmining. 1 Press the Program button. The remote controller is displayed like a picture. Then ' ',' ' and '01' is blinked. 2 Press the ' ' button. Press button repeatedly until desired mode appears. For example, if you want Thu, press button 4 times. 3 Select the time you want. Press or button, then blinking letter is shown. If you press button, then ' ' shape appears. ' ' shape means that five o'clock is reserved. Using below buttons, you can reserve time.Set/Clr
05English
8
Operation
Fan Speed
Sub Function
Set Temp
010305070911131517192123 Time Holiday Setting Timer Setting(Delay start/Pre-set stop) If Tuesday is a holiday in this week, you may set a holiday. Press the Program button. 1 Press the Week button. Select the Tuesday. 2 Press the Holiday button. Then the remote controller will be displayed ' '. The outside rectangular means holiday. Press the Program button again to finish holiday setting. 3 4 Program Program Press the Timer button to turn Timer on or off. This function is used to turn on or turn off in several hours. 1 Timer Change the timer setting until the desired time is set. 2 Min Hou If you want to cancel the timer setting, press the Cancel button. 3 Cancel Week Holiday
9 Operation Mode Operation Procedure Cooling Mode Soft Dry Mode (Cooling Model) 1st 2nd 3rd On/Off Button Operation Mode Selection Button Room Temperature Setting Button Fan Operation 1 Press the On/Off Button. 2 Press FAN Operation Button. Timer Cancel Program Week Holiday
Set/Clr
Hour MinReset
3 2 1Operation
Set Temp
Sub Function
Time Room TempMn
Or
°C
Filter Defrost Heater Preheat Out door Operation unit Timer On Off Setno.Time010305070911131517192123 Program set Sun Mon Tue Wed Thu Fri Sat 88English
10 Child Lock Function Operation procedure To set the Child-Lock Function Press the Timer button and Minute Set button for three seconds. Then the operation mode shift to child lock mode and it is displayed 'CL' in the operation display. When you press any button in this time, the remote controller is not converted to any selected mode and the 'CL' is displayed in the remote controller for about three seconds. But the Room Temperature function is operated in spite of child lock mode. To cancel the Child-Lock Function Press the Timer button and Minute Set button for three seconds. Then the child-lock mode is cancelled and the preselected mode is displayed in the remote controller. This is the Function that any children cannot used to the air-conditioner. 1 2 Self-Diagnosis Function 'CH' will flash in the remote controller display when a problem occurs. Then please contact your dealer. Time r Canc el Prog ram Wee k Holid ay
Set/Clr
Hour MinRes Et
Operation
Settemp
Subfunction
Oper ation unit Timer On Off Setno.Time010305070911131517192123 Programset Sun Mon Tue Wed Thu Fri Sat
11
English
BenzeneScouring
Clbarger
Sinner
Air outlet vent Air outlet vent Air filters Care and maintenance Care and maintenance Indoor Unit Caution: Before performing any maintenance, turn off the main power to the system. Grille, Case, and Remote Control Turn the system off before cleaning. To clean, wipe with a soft, dry cloth. Do not use bleach or abrasives. Note: Supply power must be disconnected before cleaning the indoor unit. Never use any of the followings: ? Water hotter than 40°C Could cause deformation and/or discoloration. ? Volatile substances Could damage the surfaces of the air conditioner. Clean the filter with a vacuum or warm, soapy water. ? If very dirty, wash with a solution of detergent in lukewarm water. ? If hot water (50°C or more) is used, filter may be deformed. After washing with water, dry well in the shade. Re-install the air filter. Air Filter The air filters behind Indoor unit (the suction side) should be checked and cleaned once every 2 weeks or more often if necessary. 1 2 3 102K BTU/h(Lb-H0850Qc)
Dimension CapacityAbcdefghi
1625 1564 597 54 692 294 1220 304 30 Slope 5-8 mm Indoor Unit Dimensions (mm) ? Slope of about 5-8 mm is to be provided at the drain hole side of the indoor unit for proper drainage. ? After installation the slope can be measured using a sprit level.
12 Outdoor Unit 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. Note: Dirty or clogged coils will reduce the operating efficiency of the system and cause higher operating costs.
13
English
Caution
Caution
1 2 When the air conditioner is not going to be used for a long time. Operation Tips Helpful information The air filters and your electiric bill. If the air filters become clogged with dust, the cooling capacity will drop, and 6% of the electricity used to operate the air conditioner will be wasted. When it is not going to be used for a long time. When the air conditioner is to be used again. Operate the air conditioner on Air circulation mode for 2 to 3 hours. ? This will dry out the internal parts. 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. Check that the air inlet and outlet of the indoor/outdoor unit are not blocked. 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 operation. Make sure that the doors and windows are shut tight. Avoid opening doors and windows as much as possible to keep the cool air in the room. Clean the air filter regularly. Blockages in the air filter reduce the airflow and lower cooling and dehumidifying effects. Clean at least once every two weeks. Ventilate the room occasionally. Since windows are kept closed, it is a good idea to open them and ventilate the room now and then. Turn off the circuit breaker.
14 Before you call for service... Troubleshooting Tips 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 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? 8
Note
P/No.: 3828A30102B After reading this manual, keep it in a place easily accessible to the user for future reference.