Visit us at http://www.lgservice.com LG Multi Split Type Room Air Conditioner LG OWNER'S MANUAL Dear Owner Thank you for installing LG air conditioner. Your best choice guarantees you a great performance and service to make your life comfortable & pleasant. IMPORTANT • Please read this owner's manual carefully and thoroughly before installing and operating your room air conditioner. • Please retain this owner's manual for future reference after reading it thoroughly. Room Air Conditioner Owner's Manual TABLE OF CONTENTS A. Safety Precautions ..............................3 FOR YOUR RECORDS Write the model and serial numbers here: B. Electrical Safety...................................8 Temporary Use of an Adapter ...............8 Temporary Use of an Extension Cord....8 Symbols used in this Manual.................8 Model # C. Operating Instructions .......................9 How to insert the Batteries ..................9 Storage and Tips for using the Remote Controller ................................9 Remote Control Operations ...............10 Additional Features .............................18 n Staple your receipt to this page in the event you need it to prove date of purchase or for warranty issues. Serial # You can find them on a label on the side of each unit. Dealer's Name Date Purchased D. Maintenance and Service..................22 Indoor Unit ...........................................22 Outdoor Unit .......................................24 Common Problems & Solution ...........25 Operation Tips! ...................................26 Troubleshooting Tips! Save time and money! .........................................27 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. 2 Room Air Conditioner Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. n 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. n Meanings of symbols used in this manual are as shown below. Be sure not to do. Be sure to follow the instruction. n Installation Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit. For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center. Always ground the product. • There is risk of fire or electric shock. • Do not disassemble or repair the product. There is risk of fire or electric shock. • There is risk of fire or electric shock. Install the panel and the cover of control box securely. • There is risk of fire or electric shock. Always install a dedicated circuit and breaker. • Improper wiring or installation may cause fire or electric shock Use the correctly rated breaker or fuse. • There is risk of fire or electric shock. Owner's Manual 3 Safety Precautions Do not modify or extend the power cable. • There is risk of fire or electric shock. Do not install, remove, or re-install the unit by yourself (customer). • There is risk of fire, electric shock, explosion, or injury. For installation, always contact the dealer or an Authorized Service Center. • There is risk of fire, electric shock, explosion, or injury. Be sure the installation area does not deteriorate with age. • If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury. Be cautious when unpacking and installing the product. • Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator. Do not install the product on a defective installation stand. • It may cause injury, accident, or damage to the product. 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. n Operation Do not touch(operate) the product with wet hands. Do not place a heater or other appliances near the power cable. Do not let electric parts of the product get wet. • There is risk of fire or electrical shock. • There is risk of fire and electric shock. • It may cause There is risk of fire, failure of the product, or electric shock. 4 Room Air Conditioner Safety Precautions Do not store or use flammable gas or combustibles near the product. If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the power supply cable. • There is risk of fire or failure of product. • There is risk of electric shock or fire. Be cautious that water could not enter the product. • There is risk of fire, electric shock, or product damage. When the product is not be used for a long time, disconnect the power supply plug or turn off the breaker. • There is risk of product damage or failure, or unintended operation. When the product is soaked (flooded or submerged), contact an Authorized Service Center. • There is risk of fire or electric shock. Turn the main power off when cleaning or maintaining the product. • There is risk of electric shock. Take care to ensure that nobody could step on or fall onto the outdoor unit. • This could result in personal injury and product damage. Owner's Manual 5 Safety Precautions n 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 be offensive to the neighborhoods or damage property. • 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. • Avoid personal injury. Keep level even when installing the product. • To avoid vibration. Do not install the product where it will be exposed to sea wind (salt spray) directly. • It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation. n Operation Do not expose the skin directly to cool air for long periods of time. (Don't sit in the draft.) • This could harm to your health. 6 Room Air Conditioner Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system. • There is risk of damage or loss of property. Safety Precautions Do not block the inlet or outlet of air flow. • It may cause product failure. Do not step on or put anyting on the product. (outdoor units) • There is risk of personal injury and failure of product. Do not drink the water drained from the product. • It is not sanitary and could cause serious health issues. Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire. • They may burn or explode. Use a soft cloth to clean. Do not use harsh detergents, solvents, etc. • There is risk of fire, electric shock, or damage to the plastic parts of the product. Always insert the filter securely. Clean the filter every two weeks or more often if necessary. • A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage. Use a firm stool or ladder when cleaning or maintaining the product. • Be careful and avoid personal injury. Do not touch the metal parts of the product when removing the air filter. They are very sharp! • There is risk of personal injury. Do not insert hands or other objects through the air inlet or outlet while the product is operated. • There are sharp and moving parts that could cause personal injury. Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different types of batteries. • Could adversley effect operation. If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote if the batteries have leaked. If you eat the liquid from the batteries, brush your teeth and see doctor. Do not use the remote if the batteries have leaked. • The chemicals in batteries could cause burns or other health hazards. • The chemicals in batteries could cause burns or other health hazards. Owner's Manual 7 Electrical Safety Electrical Safety • 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. • If you have any doubt whether the air conditioner is properly grounded, have the wall receptacle and circuit checked by a qualified electrician. Temporary Use of an Adapter 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. • Never use the appliance with a broken adapter. Temporary Use of an Extension Cord We strongly discourage the use of an extension cord due to potential safety hazards. For temporary situations, use only CSA certified and UL listed 3-wire grounded extension cords, rated 15 A, 125 V. This appliance should be installed in accordance with national wiring regulations. This guide acts as a guide to help to explain product features. Symbols used in this Manual This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that may cause harm to the air conditioner. NOTE This symbol indicates special notes. 8 Room Air Conditioner Operating Instructions Operating Instructions How to insert the Batteries 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. NOTICE Use 2 AAA(1.5volt) batteries. Do not use rechargeable batteries. Storage and Tips for using the Remote Controller • The remote controller may be stored by mounting it on a wall. • To operate the room air conditioner, aim the remote controller at the signal receptor. Signal Receptor Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.) Operation Indication Lamps On/Off : Lights up during the system operation. Sleep Mode : Lights up during Sleep Mode Auto operation. Timer : Lights up during Timer operation. Defrost Mode : Lights up during Defrost Mode or *Hot Start operation (Heat pump model only) OUTDOOR UNIT : Lights up during outdoor unit operation. OPERATION (Cooling model only) Power Display (Inverter only) : Indicates the setting temperature and the operating frequency of compressor.(5 steps) Plasma : Lights up during Plasma Operation. Operation indicating lamps *Hot Start operation: Stops the indoor fan in Heating Operation to prevent cold air from blowing out from unit. Owner's Manual 9 Operating Instructions Remote Control Operations The remote control transmits the signals to the system. Features of the Remote Control- Door Closed Signal transmitter 5 6 1 5 6 Signal transmitter OL A/SWING JET CO POWER TEMP 3 1 3 FAN SPEED 4 4 2 2 ON MODE ON Flip-up door (closed) TYPE A Flip-up door (closed) TYPE B INDOOR FAN SPEED 4 SELECTOR START/STOP BUTTON 1 Operation starts when this button is Used to select fan speed in four steps low, medium, high, or CHAOS. pressed and stops when the button is pressed again. OPERATION MODE 2 SELECTION BUTTON JET COOL 5 Used to start or stop the speed ROOM TEMPERATURE 3 SETTING BUTTONS 6 Used to select the operation mode. cooling. (Speed cooling operates super high fan speed in cooling mode). Used to select the room temperature. AIR SWING BUTTON Used to stop or start louver movement and set the desired up/down airflow direction. Operation Mode Cooling Operation Auto Operation Healthy Dehumidification Operation (Cooling Model) * Your unit shall have either Type A or Type B Remote Control. 10 Room Air Conditioner Operating Instructions Features of the Remote Control- Door Opened Signal transmitter ON/OFF TIMER BUTTONS 1 Used to set the time of starting and stopping operation. TIME SETTING BUTTONS 2 Used to adjust the time, (See page 22) TIMER SET/CANCEL BUTTONS 3 Used to set the timer when the desired time is obtained and to cancel the Timer operation. (See page 22) 4 CANCEL 1 5 2 7 3 ON OFF SET AUTO CLEAN (See page 22) 10 6 8 9 SLEEP MODE AUTO BUTTON 4 Used to set Sleep Mode Auto operation. 11 AIR CIRCULATION BUTTON 5 Used to circulate the room air without cooling or heating. (See page 23) ROOM TEMPERATURE 6 CHECKING BUTTON Flip-up door (opened) Used to check the room temperature. Signal transmitter 7 NEO PLASMA (OPTIONAL) Used to start or stop the plasma-purification function. (See page 20) HORIZONTAL AIRFLOW 8 DIRECTION CONTROL BUTTON (OPTIONAL) A/SWING OL JET CO Used to set the desired horizontal airflow direction. (See page 23) POWER TEMP 9 FAN SPEED 4 MODE 1 5 2 7 SLEEP ON TIMER OFF FAN ROOM CANCEL SET AUTO CLEAN TIMER 3 10 6 10 8 9 RESET BUTTON Used prior to resetting time or after replacing batteries. 11 11 AUTO CLEAN (OPTIONAL) Used to set Auto Clean mode. 2nd F Button Used prior to using modes printed in blue at the bottom of buttons. (See page 21) Flip-up door (opened) Owner's Manual 11 Operating Instructions Cooling operation 1 Press the Start/Stop button. The unit will respond with a beep. 2 Open the door of the remote controller. To select Cooling Operation, press the Operation Mode Selection button. Each time the button is pressed, the operation mode is shifted in the direction of the arrow. ON Cooling 3 OL A/SWING JET CO Auto Healthy Dehumidification Heating (Heat pump model only) Close the door of the remote controller. Set the temperature lower than the room temperature. The temperature can be set within a range of 18°C~30°C at intervals of 1°C. To raise the temperature POWER TEMP To lower the temperature FAN SPEED MODE ON the fan speed again with the door 4 Set of the remote controller still closed. You can select the fan speed in four steps-low, medium, high and CHAOS. Each time the button is pressed, the fan speed mode is shifted. Natural wind by the CHAOS logic q For fresher feeling, press the Indoor fan speed selector and set to CHAOS mode. In this mode, the wind blows like a natural breeze by automatically changing fan speed according to the CHAOS logic. 12 Room Air Conditioner Operating Instructions Auto operation (Optional) ON 1 Press the Start/Stop button. The unit will respond with a beep. 2 Open the door of the remote controller. To select Auto Operation, press the operation mode selection button. Each time the button is pressed, the operation mode is shifted in the direction of the arrow. Cooling OL A/SWING JET CO POWER TEMP FAN SPEED 3 Auto Healthy Dehumidification Heating (Heat pump model only) The temperature and fan speed are automatically set by the electronic controls based on the actual room temperature. If you want to change the set temperature, press the Room Temperature Setting buttons. The cooler or warmer you feel, the more times (up to two times) you should press the button. The set temperature will be changed automatically. MODE ON To raise the temperature To lower the temperature During Auto Operation q You cannot control the indoor fan speed. It has already been set by the Fuzzy rule. q If the system is not operating as desired, manually switch to another mode. The system will not automatically switch from the cooling mode to the heating mode, or from heating mode to cooling mode, it must be done by manually resetting. q During Auto Operation, pressing the chaos swing button makes the horizontal louvers swing up and down automatically. If you want to stop auto-swing, press the chaos swing button again. Owner's Manual 13 Operating Instructions Healthy dehumidification operation 1 Press the Start/Stop button. The unit will respond with a beep. 2 Open the door of the remote controller. To select Healthy Dehumidification Operation, press the Operation Mode Selection button. Each time the button is pressed, the operation mode is shifted in the direction of the arrow. ON Cooling 3 OL A/SWING JET CO POWER TEMP Auto Healthy Heating Dehumidification (Heat pump model only) Set the fan speed again with the door of the remote controller still closed. 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 MODE ON Natural wind by the CHAOS logic q For fresher feeling, press the Indoor Fan Speed Selector and set to CHAOS mode. In this mode, the wind blows like a natural breeze by automatically changing fan speed according to the CHAOS logic. During Healthy Dehumidification Operation q If you select the dehumidification mode on the operation selection button, the product starts to run the dehumidification function. It automatically sets the room temp. and airflow volume to the best condition for dehumidification, based on the sensed current room temp. In this case, however, the setting temp. is not displayed on the remote controller and you are not able to control the room temp. either. q During the healthy dehumidification function, the airflow volume is automatically set according to the optimization algorithm responding to the current room temp. status, so that the room condition is kept healthy and comfortable even in the very humid season. 14 Room Air Conditioner Operating Instructions Jet cool operation OL A/SWING JET CO 1 Press the Start/Stop button. The unit will respond with a beep. 2 Press the Jet Cool button to operate the speed cooling mode and the unit will operate at super high fan speed on cooling mode for 30 minutes. 3 To cancel the Jet Cool mode, press the Jet Cool button, the fan speed button or the room temperature setting button again and the unit will operate at high fan speed on cooling mode. POWER TEMP FAN SPEED or or NOTICE q During the JET COOL function at any moment, the A/C starts to blow the cool air at extremely high speed for 30 minutes setting the room temp. automatically to 18 0 C. It is especially used to cool the room temp. quickly in a hot summer. In heat pump mode or auto changeover mode, however, the JET COOL function is not available. q In order to return to the normal cooling mode from the JET COOL mode, just press the operation mode selection button, airflow volume selection, temp. setting button or the JET COOL button again. Owner's Manual 15 Operating Instructions NEO PLASMA purification operation(Optional) JET CO OL A/SWING POWER TEMP 1 Press the Start/Stop button. The unit will respond with a beep. 2 Open the door of the remote controller. Press the PLASMA button. Operation will start when the button is pressed and stop when the button is pressed again. 3 Set the fan speed again with the door of the remote controller closed. 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. h Air purifying operation (NEO PLASMA) can be with cooling, Heating or any other operations. FAN SPEED NEO PLASMA Air Purifying Operation only If you press the only PLASMA button, only PLASMA purification function operates. Then, fan speed is low. You can select the fan speed in four steps-low, medium, high or CHAOS. Each time the Indoor Fan Speed Selector button is pressed, the fan speed mode is shifted. 16 Room Air Conditioner Operating Instructions 2nd F operation CANCEL ON OFF SET AUTO CLEAN A/SWING OL JET CO POWER TEMP 1 Press the Start/Stop button. The unit will respond with a beep. 2 Open the door of the remote controller and press the 2nd Function button to operate functions printed blue color under buttons. (Check the indication of 2nd function on the display of the remote controller.) 3 2nd function disappears in a short time automatically or when the button is pressed again. FAN SPEED MODE SLEEP ON TIMER OFF FAN ROOM CANCEL SET AUTO CLEAN For more details, refer to functions next pages. TIMER Owner's Manual 17 Operating Instructions Additional Features SLEEP Sleep mode 1. Press the Sleep Mode Auto button to set the time you want the unit to stop automatically. 2. The Timer is programmed in one-hour increments by pressing the Sleep Mode Auto button 1 to 7 times. The sleep mode is available for 1 to 7 times. To alter the time period in steps of 1 hour, press the Sleep Mode Button while aiming at air conditioner. 3. Make sure the Sleep Mode Auto LED lights up. To cancel the Sleep Mode, press the sleep Mode Auto button several times until the star ( ) disappears from the operation display. NOTICE The Sleep Mode will be operated at slow fan speed (cooling) or medium fan speed (heat pump only) for a comfortable sleep. Set temp + 2°C Set temp + 1°C Set temp In cooling mode or healthy dehumidification mode: The setting temperature will automatically rise by 1°C over the next 30 minutes and by 2°C in 1 hour for a comfortable sleep. 30 min Setting the time 1. Time can be set only when you press the Reset button. Having replacing the batteries, you should press the reset buttons to reset the time. Press the Start/Stop button. 1 hr POWER 2. Press 2nd F button and check if 2nd F icon is on. 3. Press the Time Setting buttons until the desired time is set. 4. Press the Timer SET button. TIMER CANCEL SET NOTICE Check the indicator for A.M. and P.M. Delay start/Pre-set stop 1. Make sure the time is set correctly on the display of the remote controller. 2. Press 2nd 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. ON TIMER OFF TIMER CANCEL 5. To set the selected time, press the Timer setting button aiming the remote controller at the signal receptor. To cancel the timer setting Check if 2nd F icon is off. 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 out.) SET CANCEL SET NOTICE Select one of the following four types of operation. Delay OFF Timer 18 Room Air Conditioner Delay ON Timer with the unit running Delay OFF and ON Timer Delay ON and OFF Timer Operating Instructions Vertical Airflow Direction Control The up/down airflow (Vertical Airflow) can be adjusted by using the remote control. 1. Press the Start/Stop button to start the unit. 2. Press Chaos Swing button and the louvers will swing up and down. Press the Chaos Swing button again to set the vertical louver at the desired airflow direction. NOTICE q If you press the Chaos Swing button, the horizontal airflow direction is changed automatically based on the CHAOS algorithm to distribute the air in the room evenly and at the same time to make the human body feel most comfortable, as if enjoying a natural breeze. q Always use the remote control to adjust the up/down airflow direction. Manually moving the vertical airflow direction louver by hand, could damage the air conditioner. q When the unit is shut off, the up/down airflow direction louver will close the air outlet vent of the system. q Do not change the louver position by hand. This may result in high air cutting noise. Horizontal Airflow Direction Control (Optional) The left/right(Horizontal Airflow) 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 Horizontal Airflow Direction 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. Air circulation mode Circulates the room air without cooling or heating. 1. Press the Start/Stop button. the unit will respond with a beep. 2. Open the door on the remote control. Press the Air Circulation button. Close the door on the remote control. Now each time that you press the Indoor Fan Speed Selector button, the fan speed is shifted from low to CHAOS and back to low again. CHAOS Air Fan speed is on low. Fan speed is on medium. Fan speed is on high. NOTICE 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. Owner's Manual 19 Operating Instructions Auto clean (Optional) 1. Whenever you press the AUTO CLEAN button, Auto Clean Function will be reserved and cancelled. 2. Auto Clean function works before and after cooling or dehumidification mode. For details, refer to the below points. 3. When the unit is started after the reservation of Auto Clean ,the Cool Start function operates and indoor Fan is started after 20 seconds. 4. When you press Start/Stop button to turn off the unit after the you have reserved Auto Clean function, the air-conditioner circulates the indoor air in the Auto Clean mode with no more Cooling or Dehumidification operation. It lasts for 30 minutes. 5. If you press the AUTO CLEAN button again during the product operation , Auto Clean function will be cancelled. AUTO CLEAN NOTICE q During Auto Clean function, moisture left in indoor units after Cooling Operation or Healthy Dehumidification Operation can be removed. q During Auto Clean function, only Start/Stop button, Plasma button and AUTO CLEAN button are available. q During Auto Clean function, “ ” icon will blink and “ ” (not blinking) will be displayed. Forced operation Please follow the step 1 to step 5 for forced operation. 1. 2. 3. 4. 5. Turn ON the unit using power button. Turn OFF the unit using power button. Switch OFF the mains supply to the unit. Switch ON the mains supply to the unit. Turn ON the unit using the power button. After turning ON the unit will operate according to the table below : ON/OFF button Cooling Model Operating mode Indoor FAN Speed Setting Temperature Cooling High 22°C If you want to stop the unit, re-press the power button. Test operation During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room temperature and unit will stop after18 minutes. During test operation, if remote controller signal is received, the unit operates as remote controller sets. If you want to use this operation, Press and hold the ON/OFF button for 3~5 seconds, then the buzzer sound 1 "beep". If you want to stop the operation, re-press the button. 20 Room Air Conditioner Operating Instructions Auto restart In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate procedures automatically to the previous operating conditions. In the initial mode, the fan operates at a low speed and the compressor starts 2.5~3 minutes later As the compressor starts, the fan speed also resumes its previous setting mode. Note : To Enable/Disable Auto restart function 1. Press ON/OFF (Power) button, located on side of the unit, continuously. 2. After 3 seconds, Buzzer will beep once, then after 3 seconds Buzzer will beep twice. 3. Release the ON/OFF (Power) button. 4. You can see the ON/OFF LED blinking. * If, LED is blinking, as shown in Pattern A, then auto restart function is enabled. * If, LED is blinking, as shown in Pattern B, then auto restart function is disabled. ON ON OFF ON OFF ON OFF Pattern A Note: 1) 2) 3) 4) 5) ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF OFF Pattern B Auto restart can/ can not be operated in the following cases : Power failure and recovery occur very fast Earthing is not proper Power supply fluctuations. Frequency Variations Installation of site wiring Helpful information Fan speed and cooling capacity. The cooling capacity indicated in the specification is the value when the fan speed is set to high, and the capacity will be lower at low or medium fan speed. High fan speed is recommended when you wish to cool the room quickly. High Speed Owner's Manual 21 Maintenance and Service Maintenance and Service Before performing any maintenance, turn off the main power to the system. Indoor Unit 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. NOTICE Supply power must be disconnected before cleaning the indoor unit. Air filters Air inlet vent Air outlet vent Air filters (behind front panel) Vertical louver Horizontal louver The air filters behind the front grille should be checked and cleaned once in every 2 weeks or more often if neccessary. 1. Pull the both sides and remove front panel. 2. Pull the filter tab slightly forward to remove the filter. 3. Clean the filter with a vacuum cleaner or warm, soapy water. • If dirt is conspicuous, wash with a solution of detergent in lukewarm water. • If hot water (40°C or more) is used, it may be deformed. 4. After washing with water, dry well in the shade. 5. Re-install the air filter. NEO PLASMA filter (Optional) The NEO PLASMA filter behind the air filters should be checked and cleaned once in every 3 months or more often if necessary. 1. After removing the air filters, pull slightly forward to remove the NEO PLASMA filter. 2. Clean NEO PLASMA filter with the vacuum cleaner. If it is very dirty, wash it with water. 3. Note the cuts of electric discharge lines. 4. Re-install the NEO PLASMA filter to the original position. TRIPLE DEODORIZING Filter NEO PLASMA Filter TRIPLE DEODORIZER filter (Optional) 1. After removing the air filters, pull slightly forward to remove the TRIPLE DEODORIZER filter. 2. Dry in the sunlight for two hours. 3. Re-install the TRIPLE DEODORIZER filter to the original position. Don't touch this NEO PLASMA Filter within 10 seconds after opening he inlet grille, it may cause an electric shock. 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. 22 Room Air Conditioner Pow d er G a s o li n e Maintenance and Service Replacement of purifying filter (Optional) Recomended use period : About 2 years 1. Remove front panel and air filters. Air filter 2. Remove air purifying filters. 3. Insert new air purifying filters. TRIPLE DEODORIZING Filter 2 3 4. Reinsert air filters and close front panel. Owner's Manual 23 Maintenance and Service 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. Self-Diagnosis Function This unit has an inbuilt error diagnosis capability. Unit LED( Please contact your serviceman/dealer in such a situation Error Display LED ( (once) 3 sec ) ) will blink in case if thermistor fails. Check Point Indoor room temperature thermistor open/short. Indoor pipe temperature thermistor open/short. 3 sec 3 sec 24 Room Air Conditioner Maintenance and Service Common Problems and Solutions Before calling for service If you have problems with your air conditioner, read the following information and try to solve the problem. If you cannot find a solution, turn off the air conditioner and contact your dealer. Air conditioner does not operate 1. Ensure that the air conditioner is plugged into a proper outlet. 2. Check the fuse or circuit breaker. 3. Check whether the voltage is unusually high or low. Air does not feel cold enough on the cooling setting 1. Ensure that the temperature settings are correct. 2. Check to see if the air filter is clogged with dust. If so, replace the filter. 3. Ensure that the air flow from the outside is not obstructed and that there is a clearance of over 20" between the back of the air conditioner and the wall or fence behind it. 4. Close all doors and windows and check for any source of heat in the room. Before calling for service, please review the following list of common problems and solutions. The air conditioner is operating normally when: • You hear a pinging noise. This is caused by water being picked up by the fan on rainy days or in highly humid conditions. This feature is designed to help remove moisture in the air and improve cooling efficiency. • You see water dripping from the rear of the unit. Water may be collected in the base pan in highly humid conditions or on rainy days. This water overflows and drips from the rear of the unit. • You hear the fan running while the compressor is silent. This is a normal operational feature. Owner's Manual 25 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. When the air conditioner is to be used again. Operate the air conditioner on Air circulation mode (Refer to page 23) for 2 to 3 hours. Clean the air filter and install it in the indoor unit. (Refer to page 26 for cleaning filters.) • This will dry out the internal mechanisms. Turn off the circuit breaker, and disconnect the plug. Check that the air inlet and outlet of the indoor/outdoor unit are not blocked. 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. Remove the batteries from the remote control. Operation Tips Do not overcool the room. Keep blinds or curtains closed. Keep the room temperature uniform. 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. Make sure that the doors and windows are shut tight. Clean the air filter regularly. Ventilate the room occasionally. Avoid opening doors and windows as much as possible to keep the cool air in the room. Blockages in the air filter reduces the airflow and lowers the cooling and dehumidifying effects. Clean at least once in every two weeks. Since windows are kept closed, it is a good idea to open them and ventilate the room now and then. 26 Room Air Conditioner Maintenance and Service Troubleshooting Tips! Save time and money! The air conditioner may be operating abnormally when: Problem Possible Causes What To Do n The fuse is blown/circuit • Check the house fuse/circuit breaker box breaker is tripped. and replace the fuse or reset the breaker. Air conditioner does not start n Power failure. • 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. • If the voltage is unusually very high or low n High voltage. the circuit Breaker will trip. • Make sure there are no curtains, blinds, or n Airflow is restricted. furniture blocking the front of the air conditioner. • Clean the filter at least every 2 weeks. n The air filter is dirty. See the Maintenance and Service section. Air conditioner does not cool as it should n The room may have been hot. • When the air conditioner is first turned on, you need to allow time for the room to cool down. • Check for open furnace floor registers and n Cold air is escaping. cold air returns. n Check the temperature settings. • Make sure they are correct. • Check and remove such source or turn it n There might be any heating off while using the air conditioner. source in the room. • Check whether the batteries are depleted n Remote control display is or not. faint, or no display at all • Check whether the batteries are inserted in (+) and (-) direction. 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. Owner's Manual 27 P/No.: MFL60272601 After reading this manual, keep it in a place easily accessible to the user for future reference.