| Multi Type Air Conditioner   OWNER'S MANUAL   MODELS:   IMPORTANT   6710 YS   Please read through this manual. It contains valuable   6720 YS   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.   Prior to installation, this air-conditioning   unit must be submitted for approval by the   utility service which provides electricity   (EN 61000-3 Norm.)   Download from Www.Somanuals.com. All Manuals Search And Download.   Safety   Precautions   Precautions   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.   This symbol shows the possibility of death or serious injury.   WARNING   This symbol indicates the possibility of injury or damage to property.   CAUTION   Never Do This   Always Do This   ■ The following items are classified by these symblos.   WARNING   WARNING   Plug in the power plug   properly.   Do not operate or stop the   unit by inserting or pulling   out the power plug.   Do not damage or use an   unspecified power cord.   • Otherwise, it will cause electric   shock or fire due to heat   generation or electric shock.   • It will cause electric shock or fire   due to heat generation.   • It will cause electric shock or fire.   • In the supply cord is damaged, it mut be   replaced by the manufacturer or its   service agent or a similarly quallfied   person in order to avoid a hazard.   Do not modify power cord   length or share the outlet   with other appliances.   Do not operate with wet   hands or in damp   environment.   Do not direct airflow at   room occupants only.   • It will cause electric shock or fire   due to heat generation.   • It may cause electric shock.   • This could damage your health.   Always perform grounding   work.   Do not allow water to run   into electric parts.   Always install air leakage   breaker and a dedicated   switching board.   • No grounding may cause electric   shock (See Installation Manual).   • It may cause failure of machine   or electric shock.   • No installation may cause fire   and electric shock accident.   Unplug the unit if strange   sounds, smell, or smoke   comes from it.   Do not use the socket if it is   loose or damaged.   Do not open the entrance   during operation.   • It may cause fire and electric   shock accident.   • It may cause fire and electric   shock.   • It may cause electric shock.   Keep firearms away.   Do not use the power cord close to   the heating tools.   Do not use the power cord near   flammable gas or combustibles, such   as gasoline, benzene, thinner, etc.   • It may cause fire.   • It may cause fire and electric   shock.   • It may cause an explosion or fire.   3 Download from Www.Somanuals.com. All Manuals Search And Download.   CAUTION   CAUTION   • 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 infirm persons without   supervision.   • Young children should be supervised to ensure that they do not play with the air conditioner.   CAUTION   CAUTION   When the air filter is to be   removed, do not touch the   metal parts of the indoor unit.   Do not clean the air   conditioner with water.   Ventilate well when used   together with a stove, etc.   • It may cause an injury.   • Water may enter the unit and   degrade the insulation. It may   cause an electric shock.   • An oxygen shortage may   occur.   • Should be disconnected from   supply   When the unit is to be   cleaned, switch off, and   turn off the circuit breaker.   Do not put a pet or house   plant where it will be   exposed to direct air flow.   Do not leave on installation   stand which is damaged.   • Since the fan rotates at high   speed during operation, it may   cause an injury.   • This could injure the pet or   plant.   • The unit may drop or fall down   and cause an injury.   Do not apply an insecticide   or flammable spray.   Do not put a stove, etc.   where is exposed to direct   air flow.   Do not step on the   indoor/outdoor unit and   do not put anything on it.   • It may cause a fire or   deformation of the cabinet.   • It may affect combustion.   • It may cause an injury through   dropping or falling down.   Do not insert hands   through vanes when the air   conditioner is operationg   When the unit is not going   to be used for a long time,   turn off the circuit breaker.   Do not step onto an unstable   bench when cleaning and/or   maintaining the unit.   • It will cause an injury by the   rotating blower.   • If not, dirt may collect and   cause a fire.   • It may cause an injury, etc. by   falling down.   Do not use for special purposes.   Do not operate for a long time in high   humidity, e.g. leaving a door or window   open.   • Do not use this air conditioner to preserve   precision devices, food, animal, plants, and   art objects.   • In the cooling mode, if it is operated in a   room with high humidity (80%RH or more) for   a long time, water condensed in the air   conditioner may drop and may wet and spoil   furniture, etc.   It may cause deterioration of quality, etc.   4 Download from Www.Somanuals.com. All Manuals Search And Download.   Operating   Instructions   Preparation before operation   How to Insert the Batteries   Remove the battery cover by pulling it according to the arrow   direction.   1 Insert new batteries making sure that the (+) and (-) of battery are   installed correctly.   2 3 Reattach the cover by sliding it back into position.   NOTES:   • Use 2 AAA(1.5volt) batteries. Do not use rechargeable batteries.   Storage and Tips For Using the Remote Control   • The remote control may be stored mounted on a   wall.   • To operate the room air conditioner, aim the   remote control 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.   : Lights up during Sleep Mode Auto operation.   : Lights up during Timer operation.   Sleep Mode   Timer   Defrost Mode : Lights up during Defrost Mode or Hot   Start operation (Heat pump model only)   Signal   OUT   DOOR   : Lights up during outdoor unit operation.   (Cooling model only)   receptor   Operation indication lamps   5 Download from Www.Somanuals.com. All Manuals Search And Download.   Operating   About the remote control on the system   Instructions   The remote control transmits the signals to the system.   Features of the Remote Control   START/STOP BUTTON   Operation starts when this button is pressed and   stops when the button is pressed again.   1 Signal transmitter   OPERATION MODE SELECTION BUTTON   Used to select the operation mode.   2 3 4 ROOM TEMPERATURE SETTING BUTTONS   Used to select the room temperature.   INDOOR FAN SPEED SELECTOR   Used to select fan speed in four steps low, medium,   high, or CHAOS.   5 4 6 JET COOL   5 Used to start or stop the speed cooling. (Speed   cooling operates super high fan speed in cooling   mode.)   1 3 ON   OFF   CHAOS SWING BUTTON   Used to stop or start louver movement and set the   desired up/down airflow direction.   7 8 9 2 10   11   12   13   6 7 SET   CANCEL   PLASMA   ON/OFF TIMER BUTTONS   Used to set the time of starting and stopping   operation.   14   TIME SETTING BUTTONS   Used to adjust the time. (See page 13)   8 9 TIMER SET/CANCEL BUTTONS   Used to set the timer when the desired time is   obtained and to cancel the Timer operation.   (See page 13)   Flip-up door   (opened)   SLEEP MODE AUTO BUTTON   Used to set Sleep Mode Auto operation.(See page 13)   10   11   Operation Mode   AIR CIRCULATION BUTTON   Used to circulate the room air without cooling or   heating (turns indoor fan on/off). (See page 14)   Cooling Operation   Auto Operation   ROOM TEMPERATURE CHECKING BUTTON   Used to check the room temperature.   12   13   PLASMA(OPTIONAL)   Healthy Dehumidification Operation   Used to start or stop the plasma-purification function.   (See page 12)   Heating Operation   RESET BUTTON   14   Used prior to resetting time or after replacing   batteries.   • Cooling Model( ), Heat Pump Model(   ) 6 Download from Www.Somanuals.com. All Manuals Search And Download.   How to use the Operation Mode   Selection button   Operating   Instructions   Cooling Operation   Press the Start/Stop button.   The unit will respond with a beep.   1 2 Open the door on the remote control. 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.   Cooling   Auto   Healthy   Dehumidification   Heating   (Heat pump model only)   Close the door on the remote control. Set the temperature   lower than the room temperature. The temperature can be set   within a range of 18°C~30°C in 1°C increments.   3 4 To raise the temperature   To lower the temperature   Set the fan speed again with the door of the   remote control 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.   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.   7 Download from Www.Somanuals.com. All Manuals Search And Download.   Auto Operation   Press the Start/Stop button.   1 2 The unit will respond with a beep.   Open the door on the remote control. 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   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, close the door on   the remote control and 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 then be changed automatically.   3 To raise the temperature   To lower the temperature   DURING AUTO OPERATION:   ■ You cannot switch the indoor fan speed. It has already been set by the Fuzzy rule.   ■ 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 to cooling, it must be   done by manually resetting.   ■ 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.   8 Download from Www.Somanuals.com. All Manuals Search And Download.   Healthy Dehumidification Operation   Press the Start/Stop button.   The unit will respond with a beep.   1 Open the door on the remote control. 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.   2 3 Cooling   Auto   Healthy   Heating   Dehumidification (Heat pump model only)   Set the fan speed again with the door of the   remote control 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.   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.   DURING HEALTHY DEHUMIDIFICATION OPERATION:   ■ If you select the dehumidification mode on the operation selection button, the A/C starts to run the   dehumidification function, automatically setting 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 in the remote control and you are not able to   control the room temp. either.   ■ During the healthy dehumidification function, the airflow volume is automatically set according to the   optimization algorithm responding to the current room temp. status and makes the room condition   healthy and comfortable even in the high humidity season.   9 Download from Www.Somanuals.com. All Manuals Search And Download.   Heating Operation(Heat pump model only)   Press the Start/Stop button.   The unit will respond with a beep.   1 Open the door on the remote control. To select Heating   Operation, press the Operation Mode Selection button.   Each time the button is pressed, the operation mode is shifted in   the direction of the arrow.   2 Cooling   Auto   Healthy   Heating   Dehumidification (Heat pump model only)   Close the door on the remote control.   Set the temperature higher than the room temperature.   The temperature can be set within a range of 16°C~30°C in 1°C   increments.   3 4 To raise the temperature   To lower the temperature   Set the fan speed again with the door of the   remote control 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.   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.   10   Download from Www.Somanuals.com. All Manuals Search And Download.   Jet Cool Operation   Press the Start/Stop button.   The unit will respond with a beep.   1 Press the Jet Cool button to operate the   speed cooling mode and the unit will operate   in super high fan speed on cooling mode for   30 minutes.   2 3 To cancel the Jet Cool mode, press the Jet Cool button   again or the fan speed button or the room temperature setting   button and the unit will operate in high fan speed on cooling   mode.   or   or   NOTE:   ■ 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°C. It is   especially used to cool the room temp. in the shortest time in a hot summer.   In heat pump mode or neuro fuzzy mode however, the JET COOL function is not available.   ■ In order to return to the normal cooling mode from the JET COOL mode, you just press   either the operation mode selection button, airflow volume selection or temp. setting   button or the JET COOL button again.   11   Download from Www.Somanuals.com. All Manuals Search And Download.   PLASMA Purification Operation(Optional)   Press the Start/Stop button. The unit   will respond with a beep.   1 Open the door on the remote control.   Press the PLASMA air purifying   operation ON/OFF button.   Operation will start when the button is   2 PLASMA   pressed and stop when the button is   pressed again.   Set the fan speed again with door of the remote control   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.   3 ■ Air purifying operation (PLASMA) can be   with cooling, Heating or any other operations.   PLASMA Air Purifying Operation only   If you press the only PLASMA button, only   PLASMA air purifying operates.   Then, fan speed is low. You can select the fan   speed in four steps-low, medium, high or   CHAOS.   Each time the button (   speed mode is shifed.   ) is pressed, the fan   PLASMA   12   Download from Www.Somanuals.com. All Manuals Search And Download.   Operating   Additional features   Instructions   Sleep Mode   Press the Sleep Mode Auto button to set the time   you want the unit to turn off automatically.   To cancel the Sleep Mode, press the sleep   Mode Auto button several times until the star   ) disappears from the operation display.   1 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.   No t e : The Sleep Mode will be operated at   low fan speed (cooling) or medium fan   speed (heat pump only) for quiet sleeping.   IN COOLING MODE: The temperature will   automatically rise by 1°C over the next 30   minutes and by 2°C in 1 hour for comfortable   sleeping.   Make sure the Sleep Mode Auto LED lights up.   3 Setting the Time   Time can be set only when you have pressed   the Reset button. If you have just replaced the   batteries, the Reset button should be pressed   to reset the time.   Press the Time Setting buttons until the   desired time is set.   2 3 1 SET   Press the Start/Stop button.   Press the Timer SET button.   No t e : Check the indicator   for A.M. and P.M.   Delay Start/Pre-Set Stop   SET   Make sure the time is set correctly on the   remote control display.   Press the selected on/off setting by   4 1 pressing the Timer SET button while   aiming the remote control at the signal   receptor.   ON   OFF   Press the ON/OFF Timer   buttons to turn Timer on or off.   2 3 To cancel the setting the timer.   Press the Timer Cancel button while   CANCEL   aiming remote control at the signal   receptor.   (The timer lamp on the air conditioner and   the display will go out.)   Press the Time Setting   buttons until the desired   time is set.   NOTE: Select one of the following four types of operation.   with the unit running   Delay OFF Timer   Delay ON Timer   Delay OFFand ON Timer   Delay ONand OFF Timer   13   Download from Www.Somanuals.com. All Manuals Search And Download.   Vertical Airflow Direction Control   The up/down airflow (Vertical Airflow) can be adjusted   by using the remote control.   No t e :   ■ 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.   ■ 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.   ■ When the unit is shut off, the up/down airflow direction   louver will close the air outlet vent of the system.   To adjust left/right(Horizontal Airflow) direction   Caution : Ensure unit is turned off before adjusting the   horizontal airflow direction control. Carefully   open vertical louver to allow access to the   horizontal airflow direction.   Press the Start/Stop button to start the unit.   Open the door on the remote control.   Adjust the left/right airflow direction by hand.   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.   Air Circulation Mode   Circulates the room air without cooling or heating.   Press the Start/Stop button. the unit will respond with a beep.   1 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, 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.   No t e :   ■ 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.   14   Download from Www.Somanuals.com. All Manuals Search And Download.   Slide Switch Operation   FORCED OPERATION   Slide Switch   Operation procedures when the remote control can't be   used.   Open the front panel upward and move the Slide   Switch to the Forced Operation position.   FORCED   OPERATION   Slide   Switch   AUTO   RESTART   REMOTE   CONTROL   If you want to stop operation, move the Slide Switch to   the Auto Restart or the Remote Control position.   In case the power comes on again after power failure   on the Forced Operation position, the operating   conditions are automatically set as follows:   During Forced Operation, the initial mode continues.   Open the front   panel upward   Heat pump Model   21°C ≤ Room Temp. < 24°C   Healthy Dehumidification   Healthy Dehumidification Rule   23°C   Cooling Model   Room Temp. ≥ 24°C   Cooling   Room Temp. < 21°C   Heating   Operating mode   Indoor FAN Speed   Setting Temperature   Cooling   High   High   High   22°C   22°C   24°C   Auto restart   Slide Switch   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.   If you want to use this operation, Open the front panel   upward and move the slide switch to the Auto Restart   position.   FORCED   OPERATION   Slide   Switch   AUTO   RESTART   REMOTE   CONTROL   Open the front   panel upward   If you do not want to use this operation, move the Slide   Switch to the Remote Control position.   When you are out for a while, put the   Slide Switch on the Remote Control.   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.   15   Download from Www.Somanuals.com. All Manuals Search And Download.   Care and maintenance   of the air conditioner   Care and maintenance of the air conditioner   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 cleaning. To   clean, wipe with a soft, dry cloth. Do not   use bleach or abrasives.   ■ Never use any of the followings:   • Water hotter than 40°C   Could cause deformation and/or   discoloration.   NOTE:   Supply power must be disconnected before   cleaning the indoor unit.   • Volatile substances   Could damage the surfaces of the air   conditioner.   P o w d e r G a e l i n s o Air filters   Air outlet vent   Air inlet vent   (behind front panel)   Vertical louver   Horizontal louver   Lift the front access panel and pull the filter tab   slightly forward to remove the filter.   1 AIR FILTERS   Clean the filter with a vacuum 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.   The air filters behind the front grille should be   checked and cleaned once every 2 weeks or more   often if neccessary.   2 3 4 After washing with water, dry well in the shade.   Re-install the air filter.   After removing the air filters, pull slightly   forward to remove the PLASMA filter.   PLASMA FILTER, DEODORIZER   FILTER(OPTIONAL)   The PLASMA filter behind the air filters should be   checked and cleaned once in every 3 months or more   often if necessary.   1 2 3 Dip the PLASMA filter into the water mixed with   neutral detergent, for 20~30 minutes.   Dry the PLASMA filter in the shade for a day   (Especially, the humidity must be removed   perfectly on this parts).   Note the cuts of electric discharge lines.   4 5 Re-install the PLASMA filter to the original   position.   DEODORIZER Filter   PLASMA Filter   After removing the air filters, pull slightly   forward to remove the DEODORIZER filter.   1 2 3 Dry in the sunlight for two hours.   Don’t touch this PLASMA Filter within 10   seconds after opening the inlet grille, it may   cause an electric shock.   Re-install the DEODORIZER filter to the original   position.   16   Download from Www.Somanuals.com. All Manuals Search And Download.   Replacement of Purifying Filter(Option)   • Recomended use period : About 2 years   Open front panel and remove air   filters.   Remove air purifying filters.   Insert new air purifying filters.   1 2 3 2 Air filter   3 Reinsert air filters and close front   panel.   4 Air purifying filter   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.   Piping   Drain Hose   Air outlet   vents   17   Download from Www.Somanuals.com. All Manuals Search And Download.   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 14) for 2 to 3 hours.   Clean the air filter and install it in the indoor   unit.   (Refer to page 16 for cleaning filters.)   1 1 2 • This will dry out the internal mechanisms.   Turn off the circuit breaker, and disconnect   the plug.   CAUTION   CAUTION   Turn off the circuit breaker when the air   conditioner is not going to be used for a long time.   2 Check that the air inlet and outlet of the   indoor/outdoor unit are not blocked.   Dirt may collect and may cause a fire.   Remove the batteries from the remote   control.   3 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.   Ventilate the room   occasionally.   Clean the air filter regularly.   Since windows are kept closed,   it is a good idea to open them   and ventilate the room now and   then.   Avoid opening doors and   windows as much as possible   to keep the cool air in the room.   Blockages in the air filter reduce   the airflow and lower cooling   and dehumidifying effects.   Clean at least once every two   weeks.   18   Download from Www.Somanuals.com. All Manuals Search And Download.   Troubleshooting Tips!   Save time and money!   Before you call for 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   13   The air conditioner does not   operate.   • Have you made a mistake in timer operation?   • Has the fuse blown or has the circuit breaker   been tripped?   - - The room has a peculiar   odor.   • Check that this is not a damp smell exuded by   the walls, carpet, furniture, or cloth items in the   room.   It seems that condensation   is leaking from the air   conditioner.   • Condensation occurs when the airflow from   the air conditioner cools the warm room air.   - - Air conditioner does not   operate for about 3 minutes   when restarted.   • This is the protector of the mechanism.   • Wait about three minutes and operation will   begin.   Does not cool or heat   effectively.   • Is the air filter dirty? See air filter cleaning   instructions.   16   • Has the temperature been set incorrectly?   • Are the indoor unit's air inlet or outlet vents   obstructed?   7, 10   - The air conditioner   operation is noisy.   • 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.   Remote control display is   faint, or no display at all.   • Are the batteries depleted?   • Are the batteries inserted in the opposite (+)   and (-) directions?   5 Crack sound is heard.   • This sound is generated by the   expansion/constriction of the front panel, etc.   due to changes of temperature.   - NOTE   WATER RESISTANT: The outdoor side of this appliance is WATER RESISTANT.   The indoor side is not water resistant and should not be exposed to excess water.   19   Download from Www.Somanuals.com. 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