LG Ceiling & Floor Type Air Conditioner LG INSTALL MANUAL OWNER'S MANUAL 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. Prior to installation, this air-conditioning unit must be submitted for utility (EN service which 61000-3 Norm.) approval by the provides electricity F 1. Safety Precautions Your Records or Write the model and serial numbers here: Model # 2. a. Operating Instructions Serial # INSTALLATION START-UP AND SERVICE INSTRUCTIONS FAN COIL UNIT You can find them on a label on the side of each unit. Dealer's Name b. REMOTE CONTROLLER OPERATION c. d. MOUNTING BRACKET e. Date Purchased REMOTE CONTROL FUNCTION INSTALLATION, START-UP AND SERVICE INSTRUCTIONS CONDENSING UNITS R ead This Manual Inside you will find many preventive 3. Care and Maintenance helpful hints on how to and maintain your air conditioner properly. Just care on your part deal of time and money can save over you a a use little great the life of your air conditioner. 4. Troubleshooting You'll find many chart of answers to common problems If you review troubleshooting tips. our in the chart of you may not need to call Troubleshooting Tips first, for service at all. CAUTION ? Contact the authorized service technician for or ? ? repair maintenance of this unit. Contact the installer for installation of this unit. The air conditioner is not intended for children or use by young invalids without supervision. ? Young children should be supervised to they do not play with the air conditioner. ? When the power cord is to be replaced, replacement work shall be performed by authorized personnel ensure that only. ? Installation work must be performed in accordance with the national standards by personnel only. wiring authorized Safety Precautions Precautions To prevent injury and property damage, follow these instructions. Incorrect indicated operation due to ignoring instructions by the following symbols. will cause WARNING This symbol shows the CAUTION This symbol indicates the Installation harm or possibility the seriousness of which is damage, of death possibility of or injury serious or injury. to damage property. precautions WARNING WARNING Do not ? ? install, remove and reinstall the unit by yourself. Improper installation will cause water leakage, electrical shock, or fire. Please consult authorized dealer or specialist 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. WARNING WARNING Do not insert hands Discharge conditioner is It will ? Do not through Grille when the air not step on the unit and do put anything on it. Do not operate with wet hand. operating. cause an injury by the ? It may cause an injury. ? It will cause electrical shock. fan. When the air filter is to be When the unit is not not touch the removed, do moving parts or electric long time, going to be used for a turn off the circuit breaker. parts of the unit. ? ? It may cause an injury. Besure to disconnect all electric power before filter cleaning. When an abnormality (smell of ? abnormal operate in an condition, it may cause fire, damage, etc. In this case, consult your cause a fire. Repair or relocation should not be done the customer. burning, occurs, stop the air conditioner and turn off the circuit breaker. etc) ? If not, dirt may collect and If the unit continues to ? If these are done incorrectly, it may cause a fire, electric shock, injury. Consult your dealer. dealer. 3 by CAUTION CAUTION ? Contact the authorized Service technician for ? Contact the installer for installation of this unit. ? The air conditioner is not intended for repair by young use or maintenance of this unit. children or infirm persons without supervision. Young ? children should be supervised to ensure that do not they play with the air conditioner. CAUTION CAUTION Do not clean the air Ventilate well when used conditioner with water. together with a When the unit is to be switch stove, etc. off, cleaned, and turn off the breaker. ? Water may enter the unit and degrade the insulation. It may cause an electric shock. Do not put pet a where will be or house exposed ? An oxygen Do not plant to direct or shortage apply may occur. ? high it may Do not leave insecticide an Since the fan rotates at speed during operation, cause an injury. flammable spray. on stand which is installation damaged. air flow. ? This could injure the pet ?Itmaycauseafireor or Do not is ? deformation of the cabinet. plant. put stove, etc. where a exposed When the unit is not to direct air flow. be used for a The unit may drop or fall down and cause an injury. Do not going to long time, turn not step on the unit and do put anything on it. off the breaker. ? It may cause combustion. imperfect It may ? operate for a long time high humidity, e.g. leaving a door ? or In the ? It may cause an dropping Do not in injury. cause an Do not window open. or Do not onto an unstable bench when step falling use injury through down. for special purposes. attaching/detaching the panel. if it is cooling mode, 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, ? It may case down. an injury, etc. by ? Do not use this air conditioner precision devices, food, animal, plants and art to preserve falling objects. It may cause quality, deterioration of etc. etc. If the supply cord is damaged, it must be replaced When the air filter is to be by a special cord or removed, do not touch the metal parts of the unit. assembly availible from the manufacturer of its service agent. ? If will cause electrical shock or ? It may cause an fire. injury. Do not insert hands vanes operating. ? It will cause an rotating 4 through when the air conditioner is blower. injury by the INSTALLATION START-UP AND SERVICE Operating INSTRUCTIONS FAN COIL UNIT Instructions Safety considerations Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified personnel should service equipment. When working on air conditioning equipment observe precautions in the literature and labels attached to the may apply. Follow all safety codes. Wear safety glasses and work gloves. operations. Have a fire extinguisher available for all brazing operations. Warning Before unit and other Use safety precautions quenching cloth for brazing that ! service performing or maintenance operations indoor and outdoor unit. Electrical shock could cause on the system, turn off the main power switches to the personal injury. Initial check (1) The carton should not be removed from unit until reaching final location to avoid damage. (2) Inspect unit for shipping damage and file a claim the transport agency if necessary. (3) Check field electrical works: (A) Proper size of fuses and wire, correct wiring connections and grounding as specified by the local electrical codes. (B) (4) (5) (6) Also check Check for Be sure a piping Confirm there for servicing Location & (1) (2) supply voltage. Which must be within the limits shown on the nameplate. proper condensate flow. insulation is are no adequate. obstructions to air flow for indoor and outdoor units. Also check for sufficient clearances of the units. Mounting Unit should be installed for horizontal and vertical discharge application only. equipped with two (2) bracket hangers for mounting the unit under ceiling, on a wall as well as a packet containing a bracket for mounting the remote control unit. (3) Prepare the mounting bolt (1) at the distance specified in fig.1 (4) Fasten the bracket-hanger (2&3) to the mounting bolt with washers and nuts. The unit comes or Fig. Dim Model (mm) ABC 36K Btu 1605 235 1440 48K, 60K Btu 1905 270 1740 1 (5) Remove unit from carton and all the four tightening (4) bolts the four in the are (4) carefully place the unit mounting bolts into the bracket-hanger's slot and after slots, push the unit backward slowly. Secure the unit on the bracket-hanger by bolts. Condensate drain (1) Be sure the unit is reasonably level and pitched toward the drain to ensure proper drainage. (2) Piping material (A) Soft vinyl chloride pipe 22mm nominal pipe size. (B) Hard vinyl chloride (PVC) coupling 22mm nominal pipe size. (3) Connect the soft hard vinyl chloride pipe to the coupling, see fig.4 (4) The indoor unit uses gravity to drain; therefore the piping outside the unit should slope downward. (5) "Important" avoids draining as shown in fig.5 Fig. 2 Fig. 3 Refrigerant piping (1) Connections to the indoor unit are flared connection. liquid line joints fitting are in line with one another before tightening nut to provide concentric seating of tube on fitting to prevent leakage. (2) The liquid line and suction line should be run according to piping design as shown in fig.4 (3) Brazing should be performed with a constant purge of nitrogen through the piping. This is to keep inside of tubing clean. (4) Insulate suction and liquid line separately to prevent sweating (1.1) (1.2) Make flared for both suction and . Ensure tube and . Fig. NOTE: The (5) piping may also be run around the rear of the unit so as to exit on 4 the left Hand side. Use two spanners to connect the flare nut connection to the indoor unit. See fig.5 Fig. 5 (6) Permissible piping for recommended combinations. (A) Total maximum of up to 20m. (B) Limit the number of bends in piping to less than 8. (C) Piping fall, up to 15m see fig.6 (D) Piping head up to 8m see fig.6 (7) Gas leak test. Check all the brazed and flare connections for gas leaks. Fig. Electrical 6 wiring (1) Be sure to supply power from a dedicated power outlet. (2) Wiring should be made in accordance with the applicable local codes. (3) Ground both indoor and outdoor units. (4) Check for correct correspondence in terminal numbers between the indoor (5) Indoor wiring connections. and the outdoor units. Fig. Refer to wiring diagram 7 for the wire connections. Important (1) (2) (3) Secure the cables with a Authorized electricians can cable clamp after execute power connecting them cabling only. to the terminal block. The remote controller is located inside the unit behind the return air filter. Installation When (1) mounting Select a the indoor unit location that on permits the ceiling, floor or wall follows the instructions below: the air current to circulate evenly throughout the GOOD LOCATION BAD LOCATION OBLIQUE-LENE EVENLY COOLED AREA ARE NOT WELL-COOLED room. Fig. 8 (2) (3) Service space when the unit is mounted under the 300 300 mm mm Service space when the unit is mounted Air flow direction (1) To (2) To on ceiling. Start-up (1) Following 9 Fig. 10 the floor/wall. adjustment adjust the upward/downward direction of the air current, move the horizontal louver is not positioned so as to completely cut off the air flow from the unit. adjust the Fig. louver. Careful to ensure the lateral direction of air currents activate the air sweep motor. instruction are the (2) Please refer to (3) Caution R22 only approved condensing charging: combinations. unit I.O.M. for full start Please refer to the - up instructions appropriate condensing . unit installation and instruction manual. Fig. Filter removal for cleaning (1) Push down on clip at the top of the grill. (2) Swing down the grill on the hinge and remove the filter for cleaning. 11 Operating REMOTE CONTROL OPERATION Instructions ON/OFF TRANSMISSION SOURCE Press button to set timer mode. Used for the air sending control signal conditioning unit. to HOUR BUTTON Press button to increase the time 1 hour a TIMER FAN step (24 hours). COOL HEAT HR. SWING Press button to increase the time 10 minutes a OFF LCD DISPLAY CLOCK MINUTE BUTTON and 1 minute ON FAN COOL SWING step in timer mode a step in real time AUTO SLEEP FAN BUTTON SLEEP Press button to select low, Medium, High or Auto speed. TIMER clock. LOW MED FAN ON HIGH OFF AU TO WARM BUTTON Press button to increase temperature 1°C a HOUR MODE E M WARM HEAT Press button to select Cool, Fan Heat mode. COOL P SWING ON/OFF step ON/OFF BUTTON (Min. 15°C). Pressing this button will turn conditioning unit on or off. the air- SWING BUTTON Air distributor in all modes. SLEEP BUTTON Sleep mode will automatically adjust temperature and save energy when you are sleeping. LCD DISPLAYS TIMER MODE FAN, COOL, FAN COOL HEAT ON OFF TIMER ON/OFF HEAT CLOCK SIGNAL SENDING CLOCK HR. SET TEMP AUTO HOUR & MINUTE SWING SLEEP FAN SPEED SWING or SLEEP Press button to decrease a FAN T (Max. 30°C). COOL BUTTON temperature 1°C MODE BUTTON COOL MIN step SLEEP AUTO LOW-MED-HI 9 Operating REMOTE CONTROL FUNCTION Instructions 1. ABBREVIATION Ts : Tr Ti : : Setting Temperature Temperature Room Indoor defrost temperature sensor 2. OPERATION OF MAIN BOARD 2.1 COOL MODE ? If Tr operation is activated. Compressor and outdoor fan are turned on. Indoor fan is started at the speed. If Tr ≤ Ts-1°C, cool operation is terminated. Compressor and outdoor fan are turned off. Indoor fan keeps running at the set speed. > Ts cool previously ? ? ? set The range of Ts is 15~30°C. Indoor fan 2.1.1 speed can be Delay protection adjusted for low, medium, high and of compressor in normal 3 minutes before it is turned on or auto. operation. off 2.1.2 Indoor de-ice This process is checked (Ti). After the compressor has continuously, compressor and outdoor fan are turned off. Indoor fan keeps running at the set speed. When Ti ≥ 8°C or indoor de-ice operation is on for more than 8 minutes, system will return to normal operation. worked for 45 by the minutes, if Ti indoor defrost sensor ≤ 0°C for 3 minutes 2.2 FAN MODE ? Indoor fan runs ? Indoor fan speed at the set can 2.3 HEAT MODE ? If Tr < be speed while compressor and outdoor fan adjusted for (Heat Pump model If Tr. ≥ Ts + 1°C, heat operation is terminated. Compressor keeps running approximately 100 seconds. ? The range of Ts is 15~30°C. ? Indoor fan turned and outdoor fan speed can be adjusted for low, medium, high and auto. Compressor will delay for 3 minutes before it is turned on or off. 2.3.1 are on. The indoor fan is started 10 seconds later. ? ? turned off. only) Ts, heat operation is activated. Compressor and outdoor fan approximately are low, medium and high. The initial speed is medium. Delay protection of compressor in normal 3 minutes before it is turned on or off. operation are turned off. The indoor fan 2.3.2 Outdoor de-ice After 45 minutes of continuous Compressor, After 90 seconds de-ice heating operation, outdoor fan and indoor fan operation. if To ≤ -8°C, the outdoor de- ice operation is activated. turned off. are 4 way valve will be turned off, 5 seconds later, the compressor is turned on for the If To ≥ 8°C or 8 minutes has elapsed, the de-ice operation will be terminated. Then, the delay, compressor is turned off. After 90 seconds delay, 4 way valve is turned on. 5 seconds later, compressor and outdoor fan are turned on for return to normal operation. Indoor fan starts after 15 seconds has elapsed. ON DE-ICE OFF ON 4WV OFF COMPRESSOR OUTDOOR FAN INDOOR FAN 90 SEC 90 SEC 90 SEC 5 SEC >= 45 MINUTE 5 SEC ON DE-ICE OUTDOOR TEMP <= <= PRE HEAT 15 SEC 8 MINUTE -8 DEGREE ON DE-ICE MODE OUTDOOR SENSOR ON DE-ICE 2.3.3 High If Ti > 56°C, the outdoor fan is turned off, After that, if Ti If Ti > 62°C, the compressor is turned off. pressure = = 8 DEGREE OR 8 MINUTE OFF DE-ICE MODE protection < 53°C, the system will Compressor Outdoor Fan (High pressure start again. OFF OFF protection) 62°C Temp decreasing Compressor ON Outdoor Fan OFF Compressor Outdoor Fan (High pressure ON ON protection) 56°C 53°C Compressor ON Outdoor Fan ON Normal Operation Zone Compressor ON Outdoor Fan ON Normal Operation Zone 2.3.4 Pre heat and Post heat These processes will operate 10 seconds for pre heat and 100 seconds for post heat. Temp increasing 2.3 TIMER ? Timer off ? Timer ? The maximum set time is 24 hours. ? Changing can on can only only be set when the system is operating. be set when the system is off. of On/off State will cancel timer mode. 2.4 SLEEP MODE mode Sleep ? In cool mode, after sleep mode is set, Ts will increase 1°C each hour for ? In heat mode, after sleep mode is set, Ts will decrease 1°C each hour for ? Changing of can only be set in cool and heat mode. ? operation mode will cancel sleep 2 hours. 2 hours. mode. °C Ts Tr=Ts-1 Tr=Ts-2 HEAT MODE COOL MODE Time START SLEEPMODE 1 Hr 2 Hrs Tr=Ts+2 Tr=Ts+1 Ts 2.6 AUTO SPEED ? In cool mode, if Tr-Ts if 2°C < if Tr-Ts < 2°C, indoor fan is run at low speed. < 3°C, indoor fan is run at medium speed. 3°C, indoor fan is run at high speed. Tr-Ts > ROOM SENSOR (Tr) HIGH SPEED Tr=Ts+3 MEDIUM SPEED Tr=Ts+2 LOW SPEED Tr=Ts ? In heat mode, if Ts-Tr if 2°C < if Ts-Tr < 2°C, indoor fan is run at low speed. < 3°C, indoor fan is run at medium speed. 3°C, indoor fan is run at high speed. Ts-Tr > ROOM SENSOR (Tr) Tr=Ts LOW SPEED Tr=Ts-2 MEDIUM SPEED Tr=Ts-3 HIGH SPEED ?There is no auto fan 2.7 SWING ? speed in fan mode. (SYNCHRONOUS MOTOR) If the indoor fan is operating, the louver will swing or can be stopped at a preferred location in any mode. 2.8 BUZZER ? If a command is received, the system will respond with a beep. 2.9 AUTO RESTART The system uses non-volatile memory to save the present operation parameters when system is turned off or in case of system failure or cessation of power supply. Operating parameters are mode, set temperature, and fan speed. When power supply resumes or the system is switched on again, the same operation parameters, as previously set will function. 3. OPERATION OF CONTROL PANEL ON FLOOR CEILING UNIT 3.1 SLIDE ? This is In cool double-position turneing the system before position ? mode, the timer and ? SWITCH(Heat Pump In heat model only) slide switch. One a sleep sleep is for cool mode and the other for heat mode. Select on/off button. temperature of the system is 25°C with medium fan speed and swing. There set temperature of the system is 20°C with medium fan speed and swing. There modes. 3.2 ON/OFF BUTTON ? This is ? Every a light touch button. press of this button will turn the 3.3 RED LED LIGHT ? When ? If timer ? When IR system on or is - operating, off is set, the signal are no modes. mode, the timer and set position by pressing on is system on or off. SYSTEM the light light will blink is on. When on received, the light blinks system is off, the light is off. 1 second and off 3 seconds. once. are no 3.4 GREEN LED LIGHT - COMPRESSOR ? When the compressor is on, the ? When the compressor is ? light is on. off, the light is off. When de-ice function is activated, the light blinks on 1 second and off 1 second. 4. OPERATION OF REMOTE CONTROL HAND SET AND DISPLAY 4.1 ON/OFF BUTTON ? Every press of this button will turn the air ? When ? When pressed on, pressed off, the conditioning unit on or off. system will operate and display all characters the characters disappear. Clock on the LCD. displays normally. 4.2 MODE BUTTON ? Every button press will follows change the operation mode and COOL ? corresponding sign LCD on display in sequence as : Each mode has a FAN memory which records the HEAT previous operating fan speed and set temperature. 4.3 FAN BUTTON ? Every button press will follows change the fan AUTO ? speed and corresponding sign on LCD display in sequence as : There is no auto fan speed LOW MED HIGH in fan mode. 4.4 SWING BUTTON ? Press this button to turn louver in the preferred on swing mode. LCD displays the corresponding sign. Press it again to stop the air distribution location. 4.5 SLEEP BUTTON ? Press this button to turn and clear the on sleep function. LCD displays the corresponding sign. Press it again to turn off sign. 4.6 WARM BUTTON (TEMP UP) ? Only available in cool display the value. mode. Each press of this button will increase set ? The maximum ? This button is disabled in fan mode. setting temperature is 30°C. temperature 1°C and LCD will 4.7 COOL BUTTON (TEMP DOWN) ? Only available in cool display the value. mode. Each press of this button will decrease set ? The minimum ? This button is disabled in fan mode. setting temperature temperature 1°C and LCD will is 15°C. 4.8 TIMER BUTTON ? TIMER ON: Can system is off. After pressing timer button, LCD display is changed from display the last setting. Please set time on by pressing hour and min buttons. When the set number elapses, the system will start and the LCD will display the set memory for fan speed, mode, and set temperature. The clock displays normally. TIMER OFF: Can only be set when system is on. After pressing timer button, LCD display is changed from clock to timer and will display the last setting. Please set time off by pressing hour and min buttons. When the set number elapses, the system will stop except for the clock which displays normally. When timer mode is activated. The colon mark between hour and minute display will not blink. only be set when clock to timer and will ? ? ? Setting timer for less than 1 hour or changing of on/off state will cancel timer mode. 4.9 HOUR BUTTON ? This button is for timer mode and clock ? Each press of this button increases the clock setting. or timer by 1 hour. 4.10 MIN BUTTON ? This button is for timer mode and clock ? Each press of this button increases the timer setting. by 10 minutes and the clock by 1 minute. 4.11 BATTERY COMPARTMENT ? When batteries (AAA or LR03) are getting weak, please insert the new ones carefully. Remote controller will display all the characters on the LCD. After one second, all characters will disappear, remote controller is idle and clocks digits blink 00:00. Please set the clock after changing the batteries by pressing hour & min buttons. Confirm by pressing timer button to check if the clock is correct. self-test and ? **IMPORTANT NOTE** The IR signal can be received at an effective distance of 8 meters, at an angle of 30° or by reflection. Operating MOUNTING BRACKET Instructions REMOTE 120 38 mm. 50 mm. 32 mm. MOUNTING BRACKET mm. SCREW 55 22 mm. Mount the remote control remote control on the mm. mounting bracket on a wall convenient for mounting bracket as shown above. user and fix the INSTALLATION START-UP AND SERVICE Operating INSTRUCTIONS CONDENSING UNIT Instructions Installation 1- Step Complete pre-installation checks. Unpack unit Move unit to its final location, remove the carton from unit being careful not to damage the service valves and grilles. Inspect shipment File a claim with the shipping company if the shipment is damaged or incomplete. Consider system requirements Consult the local building and national electrical codes for any special installation requirements. Allow sufficient space for air flow clearance, Wiring refrigerant piping and servicing the unit. See fig.12. Locate the unit so that the condenser's air flow is unrestricted on both sides. Refer to fig.13. The unit may be mounted on a level pad directly on its base legs or mounted on raised pads at the support points. - - - 2 Step Rig - and mount unit Mounting on ground Mount on a solid, level, concrete pad. Position unit so water or ice from the roof cannot drop directly onto the unit. If local codes require the unit be fastened to the pad, tie down bolts should be used and fastened through the slots provided in the unit's mounting feet. Mounting on roof Mount on a level platform or frame. See fig.13. - - Rigging Be sure unit panels are securely in place to rigging. Keep unit upright lift unit using slings. Use cardboard or padding under sling, and spreader bars to prevent any sling damage to the unit. Install the unit so that the coil dose not face into prevailing winds. If this cannot be done and constant winds above 22 Km/hr are expected use a win baffle. 20 cm. (or over) 20 20 cm.(or over) 20 cm. 12 Fig. 13 cm.(or over) 20 20 Fig. 20 cm. cm. cm. Normal Ground Wall 3 Step condensing units may refrigerant grade, size and If meter of line set one more be connected to the condition. Do not underground. length is than the recommended extended connections. evaporator section using. Field Installation Complete refrigerant piping - The than Hanging Type periods of unit shutdown. This use less than 3m of supplied tubing of the current interconnecting tubing and do not bury more - buried the causes refrigerant may migrate to the cooler buried section during refrigerant slugging and possible compressor damage at start-up. When of is more liquid lift exposed than 20m of inter-connecting tubing and or more eliminate contamination and moisture in the so used, consider the system. Run the refrigerant tubes amount as directly as possible, avoiding they do not damage insulation on the vapour passing refrigerant tubes though the wall, seal the Leave some slack in refrigerant tubes between the unnecessary turns and bends. Suspend the refrigerant tubes tube and do not transmit vibration to the structure. Also when opening than 8m vertical lift all is and compressor oil return or contact your local distributor. If either the refrigerant tubing or indoor coil to atmospheric conditions for longer than 5 minutes, it must be evacuated to 1,000 microns to vibration is not transmitted to the structure. structure and unit to absorb vibration refer to so evaporator installation instruction for additional information. A filter drier Should be installed - installed at the indoor unit for necessary to Make Do not use. piping size receiver (a liquid line shut-off valve. This condition for the unit, capillary tube has installed receiver is not provided at the outdoor with the unit and one unit, capillary tube so has it's not should not be used.) are equipped with flare connections which are closed off in refrigerant grade tubing. Assemble flared joint by aligning the tubing the machined surface of the fitting. Start nut onto threads by backwards first and then forwards. Use correct tubing see table 1. And wrenches. Tighten nut securely. Leaks test the joint to ensure it is leak free. factory with use a after the just standard flare connections Both the suction and the our and Step 4 Power wiring - ready liquid connections of the units for connection. Use Complete electrical connections factory wired for the voltage shown on the nameplate. Provide an adequate fused sight of unit, readily accessible, but out of reach of children. Provision for locking switch open (off) is advisable to prevent power from being turned on while unit is being serviced. Disconnect switch, fuses, and field wiring must comply with local code requirements. Use copper wire only between disconnect switch and unit. Use minimum 60 deg.C wire for field power connection. Route power wires through the opening in unit's side panel and connect to the unit control box as shown on the unit's label diagram unit must be grounded. Control circuit wiring The control voltage is 220 volts. See wiring diagram and unit label. Route the control wires through the opening in the unit's side panel to connect into the - The unit is disconnect switch within - unit control box. Start-up Preliminary     checks Check that all internal connections The field electrical power source are tight and that all barriers, must agree with the unit covers and panels are in place. nameplate rating. All service valves must be open. Crankcase heater (where supplied) must be tight on the compressor crankcase. piping and fan coil by pressure method. Use R-22 at approximately 170 Kpa backed up with an inert gas to a total pressure not to exceed 1690 Kpa. Evacuation and dehydration of the field piping and fan coil is necessary service valves must be fully back-seated to close the service port. There is no valve at the service portend failure to back-seat the valve could result in s loss of the system charge or personal injury. To start unit Ensure that the crankcase heater ( where supplied) has been on for 24 hours, the field disconnect Leak test field - is closed and the room minute delay. Operate charging. thermostat is set below ambient the unit for 15 temperature, the unit compressor will start after a minutes, then check the system refrigerant charge. See refrigerant 3 Service Before performing may result in an recommended electric shock or maintenance, be injury from the sure rotating the unit main power switch is turned off failure to do fan blade. so A high pressure relief valve is located in the compressor. The relief valve opens at a pre-set pressure differential between suction (low side) and discharge (high side) to allow pressure equalization. The internal current and temperature sensitive overload resets automatically when the internal compressor (overload may require up to 45 minutes to reset). of being open, check by using an ohm-meter for continuity test. If necessary, refer to your local distributor for complete information. Pump-down procedure The system may be pumped down in order to make repairs on the low side without losing the complete refrigerant charge.  Attach a pressure gauge to suction service valve gauge port.  Frontseat (close) the liquid lines valve.  Start unit and run until suction pressure reaches 35 Kpa.  Shut unit off and frontseat (close) suction valve.  Vent remaining pressure. motor temperature drops When an to a internal overload is - safe level suspected TABLE 1 : CHARGING TABLE RECOMMENDED PIPE SIZE MODEL Suction Liquid 36K Btu 3/4" 3/8" 48K Btu 3/4" 1/2" 60K Btu 3/4" 1/2" High-pressure switch, located on the discharge line, protects against high discharge pressure caused by such as overcharge, condenser fan motor failure, system restriction, ect. it opens at a preset pressure rise. If the system pressures go above the setting during abnormal conditions, the switch opens. Service valve The service valves in the condensing unit come from the factory closed. This means the refrigerant charge is isolated from the line side of the connection ports. The service valves must be open (turned counter clockwise until seated) before the service port caps can be removed and the hoses of the gauge manifold connected. in this position, the refrigerant has access from and through the outdoor and indoor unit. The service valve can not be field repaired, there fore only a completed valve or valve system and service caps are available for replacement Defrost control The control consists of a defrost thermostat (and optional control board, depending on the type of remote control supplied). It Interrupts the normal system heating operation to defrost the outdoor coil if the coil saturated suction temperature indicates freezing temperatures Defrost control simultaneously stops the outdoor and indoor fans and energizes the reversing valve solenoid to return the system to the cooling cycle (outdoor unit as a condenser, indoor unit as evaporator). The defrost timer (optional) limits defrosting. Normally the frost is removed and the defrost thermostat contacts open to terminate defrosting before the maximum allowable time has elapsed. When defrosting is terminated, the outdoor and indoor fan motors are energized, and the reversing valve solenoid is de-energized returning the unit to the heating cycle. Reversing valve in heat pumps, the change-over between heating and cooling modes is accomplished with a valve that reverses the flow of refrigerant in the system. The reversing valve solenoid can be checked when the power is off with an ohm-meter. Check for continuity and shorting to ground. With the control circuit (220-240V) power on, check for the correct voltage at the solenoid coil. Check for a burned or overheated solenoid. With the unit operating, other items can be checked, such as frost or condensate water on the refrigerant lines. Using a remote measuring device. check the inlet and outlet line temperatures. Do not touch the line. If the reversing valve is operating normally, the inlet and outlet temperatures on the appropriate lines should be close Any difference would be due to heat loss or gain across the valve body. Temperatures are best checked with a remote reading electronic-type thermometer with multiple probes. Figures 14 and 15 show test points (tp) on the reversing valve for recording temperatures. insulate points for a more accurate reading. It the valve is defective; shut-off all power to the unit and remove all charge from system. Remove the valve using a tubing cutter. Wrap the new valve with a wet rag to prevent overheating while brazing. events - To accumulator To accumulator To outdoor coil TP-4 TP-3 TP-2 From indoor coil via service valve on outdoor coil From outdoor coil TP-4 TP-3 To indoor coil via service valve on outdoor coil Insulate TP-2 for accurate reading Insulate for accurate TP-1 reading From compressor line discharge Fig. 14 - solenoid in, check for leaks, cool modes several times to be sure From compressor line discharge Reversing valve (cooling mode or defrost mode, After the valve is brazed TP-1 Fig. energized) evacuate and the valve functions 15 - Reversing valve (heating mode, solenoid de-energized) charge system, Operate properly. the system in bath heat and Refrigerant Charging To prevent personal injury, wear safety glasses and gloves when handling refrigerant. Do system. This can cause compressor flooding. not overcharge When re-charging is necessary during the heating season, weigh in the total charge as indicated in the charging table. Remove any refrigerant remaining in the system before re-charging. If the system has lost the complete charge, evacuate and re-charge by weight. Service port connection.Are provided on the liquid and suction line service valves. Maintenance Before do so performing the recommended may result in electric shock maintenance, be from the injury or the unit's main power switch is turned off. Failure to sure rotating fan blade. Cleaning coils The coil should be washed-out with water, or blown-out with compressed air. Clean the coil annually, or as required by the location or outdoor air conditions. Inspect the coil monthly and clean as required. Dirt and debris may pass through the first coil section, then become trapped between the rows of fine and restrict the condenser air flow. Use a flashlight to determine if any dirt or debris has collected between the coil sections. - Clean coil as follows.  Turn off unit power.  Using a water-hose, or any other suitable equipment, flush the coil from the outside to flush all dirt and debris from the drain holes in the base of the unit. FAN MOTOR remove dirt. Be sure to CONDENSER COIL COMPRESSOR FAN TOP VIEW LIQUID VALVE SUCTION VALVE FRONT VIEW RIGHT SIDE VIEW ELECTRIC WIRE SIZE OUTDOOR MODEL FUSE CONTROL INDOOR FUSE CONTROL CIRCUIT BREAKER 36K Btu 10A / 250V 0.5A / 250V 30A / 3P. 48K/60K Btu 10A / 250V 0.5A / 250V 50A / 3P. ELECTRIC WIRE SIZE ON THE GROUND 60°C - - (SQMM) IN PIPE 75°C 6 6 **REMARK** ROOM TEMPERATURE * TIMER MODE AIR FLOW SPEED OPERATION MODE MORE THAN 23°C2 6 °C CONTINUOUS AUTO COOL LESS THAN 23°C2 3 °C CONTINUOUS AUTO HEAT If an air conditioner is Cooling when the Heating when the DESIGNATED TEMPERATURE a room room model for both temperature temperature cooling at the at the and heating. start of operation start of operation is above 23°C. is less 23°C. Care and Care and Maintenance Maintenance CAUTION: Before performing any You can do turn off the main power to the system. periodic maintenance for your unit yourself; this includes cleaning air filters, the condenser coil, and conducting a general unit inspection on a regular basis. some cabinet, clearing maintenance, of the cleaning unit WARNING WARNING Before before removing access panels attempting any servicing to service can unit, disconnect power supply. Failure result in severe injury or to disconnect power death. Condenser coil Unfiltered air circulates with dust, dirt, through etc.. To clean the the unit's condenser coil and can cause the coil's surface to become coil, vertically (i.e., along the fins) stroke the coil surface with a clogged soft bristled brush. Keep all vegetation away from the condenser coil Maintenance Performed To area. by Serviceman your unit operating safely and efficiently, the manufacturer recommends that a qualified serviceman check the entire system at least once each year, or more frequently if conditions warrant. Your serviceman may keep examine these 1. Filters areas of your unit: (for cleaning) 2. Motors and drive system components 3. Condenser coils 4. 5. 6. 7. 8. 9. (for cleaning) Safety Controls (for mechanical cleaning) Electrical components and wiring (for possible replacement or connection tightness) Condensate drain (for cleaning) Inspect the unit duct connections to ensure they are physically sound and sealed to the Inspect the unit mounting support to see that it is sound. Inspect the unit to ensure there is no obvious deterioration. unit casing. When the air conditioner is not When air conditioner is not to be used for a 1. long the air conditioner Operate on going to be used for a going This will dry time. When the air conditioner is to time. be used again. 1. Clean the air filter and re-install it in the indoor Air circulation side. mode for 2 to 3 hours. ? long out the internal 2. Check that the air inlet and outlet of the parts. indoor/outdoor unit are not blocked. 2. Turn off the circuit breaker. CAUTION CAUTION Helpful Turn off the circuit breaker when the air conditioner is not going to be used for a Dirt may collect and may If the air filters become clogged with dust, the cooling capacity will drop, and 6% of the electricity long time. cause a information The air filters and your electric bill. fire. used to operate the air conditioner will be wasted. Operation Tips Do not overcool the Keep room. blinds or curtains Clean the air filter regularly. closed. This is not good for your electricity. health and wastes Do not let direct sunshine enter Blockages the the airflow and lower room when the air conditioner is in operation. and in the air filter reduce dehumidifying cooling effects. CAUTION CAUTION Before removing access panels to draw out air filters, disconnect power supply. Since the fan rotates at cause a serious injury Make sure that the doors and windows Avoid opening windows keep as are shut Ventilate the tight. as possible the cool air in the room. Since windows to it is Clean at least are kept closed, idea to open them and ventilate the room now and a it may room occasionally. doors and much high speed, good once every month using a vacuum cleaner or washing with a neutral detergent in lukewarm water. After washing with water, it well in the shade. then. ? Do not expose the air filter to sunlight or heat from a direct fire when 22 dry drying it. TROUBLESHOOTING TROUBLESHOOTING Problem Checklist 1. Nothing works Power Remedy List supply to unit Re-set circuit breaker Change Interconnecting wiring Look for break in cable PCB varistor Replace Replace Transformer 2. Power on but system will not function 3. Power on but indoor will not function Re-set batteries Change function hand set on fan terminal (pcb) Evaporator sensor Connector on but compressor will not function 5. Power on but outdoor fan will not function on manual but indoor key will not ( or hand set relay, if on but indoor display will 8. Indoor not function up-down will not function louver faulty replace Repair or replace plug Wait to reset and check amps Faulty motor Evaporator frozen Motor capacitor Replace Room temp set point Relay on PCB Comp contactor Comp overload Indoor sensor(de-ice ) Comp internal overload Compressor terminals Adjust on hand set Replace relay or PCB De-ice Wait for defrost to terminate sensor (heating) Defrost and check filter / gas If power on contactor Check for good down, check gas connection temp low Check gas pressure See control functions Indoor coil too hot Clean filter Fan Replace relay or Replace motor Replace Replace plug switch Connector plug Faulty display Reset switch position Handset control Faulty stepping Connector plug motor & de-ice contactor point See control functions Allow comp to cool sensor Faulty coil, replace Re set, check amps and set Outdoor PCB charge Replace Ambient Connector ) circuit, replace or PCB repair switch or PCB function 7. Power loose connection Motor overload relay on Faulty motor 6. Power No power check If short or PCB Change on fuse PCB Handset control Mode change fuse Re-set control switch Power 4. Power or PCB fuse Replace or repair Replace display or Correct or operate Change function Replace Replace or repair PCB once sensor 9. Indoor left-right swing will not function 10. Power lost Hi Med or Low Handset control Faulty 3 11. Condenser fan short 12. 16. 17. on System not pressure cooling High suction / low discharge pressure 18. Outdoor coil icing relays Outdoor plug on up Indoor sensor faulty Gas overcharge Replace Clean Reduce charge Air recirculation Move unit Faulty motor Cap tube blocked Replace Replace PCB relay charge Reversing valve sticking Replace or change Low gas Add gas and leak test Ambient Wait for de PCB temp low - ice sensor faulty charge (heating) point too low Dirty filter Faulty indoor PCB faulty ice initiation Replace Replace Add gas and leak test Adjust temperature Clean filter sensor Indoor fan not Low gas - Clean faulty Indoor set PCB Replace condenser coil Low gas up Check for air recirculation condenser coil Outdoor de icing See control functions sensor Dirty Dirty 19. Indoor coil PCB Unit location cooling High discharge cooling cycle Change function Replace Replace or repair Replace relay motor Connector speed cycles Change function Replace Replace or repair Replace relay or PCB Faulty swing motor Connector plug Relay on PCB but indoor fan on or Handset control working charge Replace Replace Replace Replace Add gas and leak test Memo Memo P/No.: 3828A20219A After reading this manual, Printed in Korea keep it in a place easily accessible to the user for future reference.
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