OWNER’S MANUAL AIR CONDITIONER Please read this manual carefully before operating your set and retain it for future reference. TYPE : CEILING CASSETTE P/NO : MFL42763408 www.lg.
Ceiling Cassette Air Conditioner Ownerʼs Manual TABLE OF CONTENTS Safety Precautions.........................3 FOR YOUR RECORDS Write the model and serial numbers here: Model # Prior to Operation ..........................6 Serial # You can find them on a label on the side of each unit. Dealer's Name Introduction ....................................7 Electrical Safety .............................8 Operating Instructions...................9 Part Description ...........................
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. ■ Meanings of symbols used in this manual are as shown below. Be sure not to do.
Safety Precautions ■ Operation 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 plug or unplug the power supply plug during operation. • There is risk of fire or electric shock. Do not allow water to run into electric parts. • It may cause There is risk of fire, failure of the product, or electric shock.
Safety Precautions ■ Installation Always check for gas (refrigerant) leakage after installation or repair of product. • Low refrigerant levels may cause failure of product. Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. • It may cause a problem for your neighbors. Install the drain hose to ensure that water is drained away properly. • A bad connection may cause water leakage. Use two or more people to lift and transport the product.
Prior to Operation Prior to Operation Preparing for operation 1. Contact an installation specialist for installation. 2. Plug in the power plug properly. 3. Use a dedicated circuit. 4. Do not use an extension cord. 5. Do not start/stop operation by plugging/unplugging the power cord. 6. If the cord/plug is damaged, replace it with only an authorized replacement part. Usage 1. Being exposed to direct airflow for an extended period of time could be hazardous to your health.
Introduction Introduction Symbols used in this Manual This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that could cause harm to the air conditioner. NOTICE This symbol indicates special notes. Features WARNING: This appliance should be installed in accordance with national wiring regulations. This guide acts as a guide to help to explain product features.
Electrical Safety Electrical Safety WARNING: This appliance must be properly grounded. To minimize the risk of electric shock, you must alway plug into a grounded oulet. Preferred method Ensure proper ground exists before use WARNING: Do not cut or remove the grounding prong from the power wire.
Operating Instructions Operating Instructions Indoor Unit, Outdoor Unit Anti-bacteria Anti-bacteria Air Outlet Air Inlet Anti-bacteria Remote Controller 1⃞ 2⃞ 3⃞ 4⃞ 5⃞ 6⃞ Operation Indication Lamps 1⃞ Forced Operation : Operation procedures when remote control can't be used. 2⃞ Defrost Mode : Lights up during defrost mode or hot start operation. (heat pump model only) 3⃞ Timer : Lights up during timer operation.
Operating Instructions Wireless Remote Controller (Accessory) This air-conditioner is equipped with wired remote controller basically. But if you want to be available with wireless remote controller, you pay for it. 5 6 4 2 7 11 8 13 14 ON OFF 1. START/STOP BUTTON Operation starts when this button is pressed and stops when the Signal transmitter button is pressed again. 2. OPERATION MODE SELECTION BUTTON Used to select the operation mode. 3.
Part Description Part Description Name and Function of Remote Controller(PQRCVSL0QW) 1 10 9 8 2 3 7 4 11 12 13 5 6 14 15 Please attach the inform label inside of the door. Please choose proper language depend on your country. 1 OPERATION INDICATION SCREEN 2 SET TEMPERATURE BUTTON 3 FAN SPEED BUTTON 4 ON/OFF BUTTON 5 OPRATION MODE SELECTION BUTTON 6 WIRELESS REMOTE CONTROLLER RECEIVER • Some products don't receive the wireless signals.
Part Description Standard Operation - Standard Cooling It cools the room by comfortable and clean wind. 1 Press indoor. button to turn on the button to select 2 Press Cooling operation mode. the desired temperature 3 Adjust 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.
Part Description Standard Operation - Heating Mode(Heat pump model only) It supplies warm wind to the indoor 1 Press indoor. button to turn on the button to select 2 Press Heating mode. (To check the indoor temperature, press the room temperature button.) the desired temperature 3 Adjust by pressing buttons. When setting the desired temperature lower than room temperature, there is only ventilation wind. • Heating drive only operates at the cooling and heating model.
Part Description Standard Operation - Auto Operation Mode 1 Press indoor. button to turn on the button to select 2 Press Artificial intelligence Mode. can adjust 3 You the temperature as the picture on the right for cooling and heating model. the case of 4 For cooling exclusive, as the picture on the right, you can adjust the temperature from hot to cold, from "-2" to "2" based on "00".
Part Description Standard Operation - Fan Mode It blows the air as it is in the indoor, not the cold wind. 1 Press indoor. button to turn on the 2 Press Mode. button to select Fan time pressing button, you 3 Every can select wind flow in order of feeble → weak → medium → strong → automatic. When running ventilation, compressor of AHU doesn't work.
Part Description Standard Operation - Temperature Setting/Room Temperature Check Temperature Setting can simply adjust the desired 1 We temperature. • Press the buttons to adjust the desired temperature. : Increase 1˚C or 2˚F per one time pressing : Decrease 1˚C or 2˚F 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 or 1˚F.
Part Description Standard Operation - Airflow Setting Wind powerfulness : You can simply adjust desired wind powerfulness. setup desired wind 1 Please powerfulness by wind powerfulness button. • Every time you press wind powerfulness, you can select the wind flow in order of ‘feeble → weak → weak medium → medium → medium strong → strong → power → automatic’. • The menu item might not be partially selected according to product function. • Please refer to product manual for product’s detailed function.
Part Description Sub function - Direct Wind / Indirect Wind It is the function to directly or indirectly control wind direction by body perception sensor. The method to setup direct/indirect wind 1 Please press button. icon of direct/indirect wind 2 The blinks on the display, and then, if button, direct/indirect pressing wind icon is fixed and the function is setup. direct wind indirect wind pressing 3 Ifsetup mode.
Part Description Function setting - Filter Sign Clear This function is to clear the indicator of indoor filter cleaning. 1 Press until the button repeatedly is flashing. the is flashing, press 2 When the to clear this display • 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.
Part Description Function setting - Elevation Grill This function is to move the indoor filter up/down for cleaning filter. button 1 Press Repeat pressing button until icon flash. to descent using button 2 Move and press button will display descent icon and the up/down grill will descent. up/down grill descents to the 3 When desired position, move to stop icon suing button and press to stop up/down grill.
Part Description Function setting - Vane Angle Control This function is to adjust angle at which airflow is blow out. pressing 1 Repeat icon flash. button until button to select active vane : 2 Press 1 / 2 / 3 / 4 / All / Standard Select Vane number using buttons. ❈ Vane number : No. 1, 2., 3, 4, all, or standard - Selected vane is in operation. - Please verify the operating vane. - To set the angle of all the vanes, select 'all'. - To set as the factory default settings, select 'standard'.
Part Description Function setting - Changing Current Time press function setup 1 Please button. If pressing function setup button repeatedly, it moves to time setup 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'. 2 Press day. key to adjust the current key to move to AM/ PM setting 3 Press mode (the 'AM/ PM segment will flash). AM/ PM value by 4 Setting pressing button.
Part Description button to move to 'Minute' 7 Press setting mode. (the 'Minute' segment will flash) Minute value by pressing 8 Setting button. 9 Press 10 button to finish. 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.
Part Description Programming - Simple Reservation You can set the reservation conveniently in the units of 1 hour from 1 hour to 7 hours. button to enter the 1 Press Programming mode. (the segment flashing) Ex) Setting Simple Reservation time as '3'. 2 Press time. 3 Press button to adjust reservation button to finish setting. button to exit. 4 Press ❈ After setup, it automatically gets out of setup mode if there is no button input for 25 seconds.
Part Description Programming - Sleep Reservation 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 has elapsed. button to enter the 1 Press Programming mode. Ex) Setting Sleep Reservation time as '3'. pressing button to enter the 2 Repeat SLEEP reservation setting mode. ( 3 Press time.
Part Description Programming - ON Reservation Automatically turned On at reserved time that you set. 1 Press button. Ex) Setting ON Reservation Time as 'AM 10:20'. pressing button to 2 Repeat enter the ON reservation setting mode. ( segment flashing) 3 Press setting. button to adjust AM/ PM button to Hour setting 4 Press mode. When the Hour icon flash, please setting time. The setting range is within 1~12. button to shift to Minute 5 Press setting mode.
Part Description button to exit. 7 Press ❈ 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. - 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.
Part Description Programming - OFF Reservation Automatically turned Off at reserved time that you set. 1 Press button. Ex) Setting OFF Reservation Time as 'AM 10:20'. pressing button 2 Repeatedly to enter the OFF reservation setting mode. ( segment flashing) 3 Press setting. button to adjust AM/ PM button to shift to Hour 4 Press setting mode. When the Hour icon flash, please setting time. The setting range is within 1~12. button to shift to Minute 5 Press setting mode.
Part Description button to exit. 7 Press ❈ 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. - 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.
Part Description Programming : Weekly Reservation You can set the daily reservation in weekly unit. Weekly reservation keeps operating until before you cancel it once you setup 1 Please move to reservation setup mode by pressing reservation button. ❈ You can setup two weekly reservations for one day, and up to fourteen reservations for a week. For example, to setup (Tuesday morning 11:30 turned on ~ afternoon 12:30 turned off), you setup in order below.
Part Description move to 'AM/PM' setup part 10 Please of turning off by using button. - AM/PM setup is identical with turning on time setup. move to 'hour' setup part 11 Please of turning off by using Right button. - It is the part to reserve the time at which air-conditioner is turned off. - If 'hour' indication blinks, please setup 'hour'. ❈ Please setup 'hour' and 'minute' identically with the method to setup turning on time. finishing weekly reservation setup, please press setup/cancellation button.
Part Description Programming : Holiday Reservation It automatically stops at reserved day that you set. press button. 1 Please It enters into reservation setup mode. move to 'holiday' by repeatedly 2 Please pressing button. move to 'date' that 3 Please you want to setup holiday by using button. or cancel holiday by using 4 Pleaseorappointbutton. For example, when you setup Monday/Friday to holiday - 'Monday', 'Friday' letter disappears. press 5 Please holiday setup.
Part Description Ventilation setting (optional) Incase of there is linkage between ventilator and air conditioner, it is able to control this ventilator. 1. Control using remote controller where air conditioner indoor unit and the ventilation product is installed at the same time.
Maintenance and Service Maintenance and Service CAUTION Before performing any maintenance, turn off the main power to the system. 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. NOTICE Supply power must be disconnected before cleaning the indoor unit. Anti-biofilter Air Intake Air Outlet Remote Controller Air Filters 1 Remove the Air filters.
Maintenance and Service When the air conditioner is not going to be used for a long time. 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 15.) • This will dry out the internal mechanisms. 2. Turn off the 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.
Maintenance and Service Troubleshooting Tips! Save time and money! Check the following points before requesting repairs or service.... If the fault persists, please contact your dealer or service center. Case Explanation See page The air conditioner does not operate. • Have you made a mistake in timer operation? 22~32 • Has the fuse blown or has the circuit breaker been tripped? - The room has a peculiar odor.
Maintenance and Service Details of LG serial No. 1 2 3 4 5 6 7 8 9 10 Main Service Part List Code Detail Code of Model Meaning NO PART NAME 1 Year 0~9 (Digit) The last digit of year ex) 1997 → 7, 2000 → 0 1 COMPRESSOR 2,3 Month 01~12 (Digit) Month ex) March → 03, August → 08 2 MOTOR 4 Nation A~Z (Alphabet) Where manufactured ex) K → Korea, C → China 3 MAIN PCB ASSY 4 REMOCON 5 Product A~Z (Alphabet) ex) A → Airconditioner 5 TRANSFORMER 6~10 Serial No.
