Outdoor Unit
Contents
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3. 512 3 4 100 2N 3 4 Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT A UNIT A UNIT Installation Outdoor unit Terminal block cord Power cord 2 Secure the cable onto the control board with the hold er clamper 3 Refix the cover control to the original position with the Screw 4 Use a recongnized circuit breaker between the power source and the unit A disconnection device to ade quately disconnect all supply lines must be fitted CAUTION The power cord connected to the outdoor unit should be complied with the following specifications Rubber insulation type HOSRN F approved by HAR or SAA CAPACITY Btu h SECTION AREA NORMAL CROSS 24K 2 5mm 36K 3 5mm 48K 5 5mm The connecting cable connected to the indoor and outdoor unit should be complied with the following specifications Rubber insulation type HO7RN F approved by HAR or SAA Models NORMAL CROSS SECTION AREA L2 C242GL0 1 5mm Others 0 75mm Service Manual 47 Installation CAUTION If a power plug is not to be used provide a circuit breaker between power source and the unit as shown below Main power source Air Conditioner L Circuit Breaker Use a circuit breaker or time delay fuse Connect the cable to the indoor unit 1 Connect the wires to the terminals on the con
4. LILI PLASMA Tomm PLASMA or 48 Operation oworr BUTTONS Used to set the time of starting and stopping operation e TIME SETTING BUTTONS Used to adjust the time 9 TIMER SET CANCEL BUTTONS Used to set the timer when the desired time is obtained and to cancel the Timer operation SLEEP MODE AUTO BUTTON Used to set Sleep Mode Auto operation AIR CIRCULATION BUTTON Used to circulate the room air without cooling or heat ing turns indoor fan on off TEMPERATURE CHECKING BUTTON Used to check the room temperature e PLASMA OPTION Used to start or stop the plasma purification function NEGATIVE ION OPTION Used to generate negative ion HORIZONTAL AIRFLOW DIRECTION CONTROL BUTTON NOT ON ALL MODELS Used to set the desired horizontal airflow direction RESET BUTTON Used prior to resetting time or after replacing batteries Service Manual 53 Operation 2 Remote Controller Signal transmitter Transmits the signals to the room air conditioner E Signal transmitter EAD s 8 200 GMTIME CB TIME ame omid AE Bw PLASMA or MI AN vr 54 Multi Air Conditioner ON OFF TIMER BUTTONS Used to set the time of starting and stopping operation TIME SETTING BUTTONS
5. RO1HAK KRC107M am d gt ICO2M KID65004AP 9 8 RY BP4 ROSHAK RY AWAY A TEST SW RY AWAY B RY SV4 RY SV3 RY SV2 RY SV1 RY BP2 3 co RY BP1 RY LOW RY SVSHBP1 RY HI RY COMP B RY COMP A gt ROSIGIK 0001 25V KRCIO7M 0 001 25 KRC107M 0001 25 KRC107M 7 ROIGASK Pos 11 ROZGASK pos 12 ROSGASK pos 13 0404 55 pe 14 ROSGASK Poi 15 Poo 16 HAAS 1 osco esra DOMGW CO4H 05H 0 01 25V RY 4WAY3 RY 4WAY4 RY BP4 RY BP1 RY BP2 RY SVI RY sv2 RY SV3 RY SV4 CNBYPASS BYPASSZ 625 Feed RY COMP A DEE oncom RY COMP
6. The second defrost starts only when the outdoor pipe temperature falls below 6 C after 45 minutes passed from ending of the first defrost and more than 10 minutes operation of compressor Cooling overload Control indoor fan by sensing outdoor pipe temperature One step down from setting fan speed if pipe temperature is oven 50 and if below 45 operate on setting temperature e One of the outdoor fan is OFF if pipe temperature is below 0 C and outdoor fan is ON if pipe temperature is over 090 Heating overload H P models Outdoor fan ON OFF by sensing outdoor pipe temperature e Outdoor fan is OFF if pipe temperature is over 6 5 C and outdoor fan is ON if pipe temperature is below 0 C Outdoor fan is off if any one part is heating overload condition 22 Multi Air Conditioner Operation Details Fuzzy Operation C O Model According to the temperature set by Fuzzy rule when the intake air temp is 0 5 C or more below the setting temp the compressor is turned off When 0 5 C or more above the setting temp the compressor is turned on Compressor ON Temp gt Setting Temp 0 5 C Compressor OFF Temp gt Setting Temp 0 5 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to the intake air temp at that time 26 lt Intake Air Temp 225 24 lt Intake Air Temp lt 26 C gt Intake Air Temp 1 22 lt Intake Air Temp lt 24 C gt Intake
7. Comp Relay 4 Way Relay Check point Comp ON Comp OFF Check point 4 Way ON 4 Way OFF Between two pin About DC Between two pin of DC part in relay Below DC 1V of DC part in relay Below DC 1V About DC 12V 12V for COMP for 4 way lt gt Check Outdoor Unit 38 Multi Air Conditioner Electronic Parts Troubleshooting Guide 7 Outdoor unit d Check Outdoor Unit Board Operation Check in Outdoor Items Content Remedy Power Transformer Outdoor unit About AC220V 240V 10 Check the power voltage Replace Trans Input Voltage About AC14 3V Output Voltage DC 12V Replace ICO1D e IC01D 7812 Output Indoor Outdoor unit DC 5V Replace IC02D e C02D 7805 Output Indoor Outdoor unit Replace faulty parts e ICO1A KIA7036 Reset IC X01 8MHz Il Turn off Main Power Il Check the electrical wiring diagram of outdoor side Check the abnormal condition for the component of Compressor Outdoor Fan Motor 4 way Check the open or short of connecting wires between indoor and outdoor 8 Communication ei The control data can be transmitted or received between indoor and outdoor unit with one signal cable e If the data be disturbed by any noise level and misconnection the unit will be operated incorrectly In this case the indoor unit blinks the operation and operati
8. A UNIT B HEAT EXCHANGER CAPILLARY TUBE Jl Pipe Size Diameter inch Max Max eX mww Capillary Cooling amp Deice piping length piping elevation Gas Liquid m m 1 2 1 4 15 8 Service Manual 11 Wiring Diagram Wiring Diagram 2 L2 H242GL0 ASM PWBASM DC PWB ASM 1 THERMISTOR eem STEP di 1 CN AC DC CN AC DC go CN AC DC LCN U D CN TH CN L R SH CAPA FUSE 250V T2A CLEAN PLASMA PLASMA CN AC DC RY COMP SAFETY S W1 J SAFETY SAW1 SAFETY S W2 SAFETY S W2 OPTION I HAE amp SW FORCE VE SW FORCE i TO OUTDOOR UNIT R WIRING DIAGRAM 3854A20142F INDOOR WIRING DIAGRAM 3854A20135F BK CLEAN LINN HOOALNO OL 2 L2 H242GL0 CAPACITOR MAIN PCB ASSY FUSE T3 15A CN COM
9. 5 mon bs Pisa BL E m DI bei vaar 20020 So De Low VOLTAGE GND a cuo 104 DC HH DE HIGH VOLTAGE GND VOLTAGE GND sE Do VOLTAGE GND VOLTAGE GND 15 Service Manual Schematic Diagram 2 L2 H242GL0 TB aroas 5 aroas 6e og asco nor soif ozz asco p HOUTE god ans trus oam Soul rom voor 47 asosaaz n avoi T 8 OV HOION Avs
10. Check the indoor temperature sensor is disconnected or not About 10kQ at 25 d Check Relay RY COMP for driving compressor When the power About AC220V 240V is applied to the connecting wire terminal support transferred to compressor PWB Ass y is normal Check the circuit related to the relay Check point COMP ON COMP OFF Between two pin of DC Below DC 1V part in relay for COMP app About DC12V i Check Outdoor Unit Service Manual 35 Electronic Parts Troubleshooting Guide 4 When indoor F Turn off Main power d Check the connection of CN FAN or CN MOTOR d Check the Fan Motor d Check the Fuse AC250V T2A d Check the related circuit of indoor Fan Motor The pin of Micom and the part for driving SSR Check the pattern Check the SSR SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF d Turn ON Main Power d Check the SSR high speed operation by remote control The Indoor Fan Motor is connected The voltage of PIN NO 1 blue and 3 yellow of CN FAN or CN MOTOR About AC 180V over About AC 50V over SSR is not damaged SSR Check 36 Multi Air Conditioner Electronic Parts Troubleshooting Guide Confirm that the Ver
11. Used to adjust the time TIMER SET CANCEL BUTTONS Used to set the timer when the desired time is obtained and to cancel the Timer operation SLEEP MODE AUTO BUTTON Used to set Sleep Mode Auto operation AIR CIRCULATION BUTTON Used to circulate the room air without cooling or heating turns indoor fan on off ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature PLASMA OPTION Used to start or stop the plasma purification function NEGATIVE ION OPTION Used to generate negative ion HORIZONTAL AIRFLOW DIRECTION CONTROL BUTTON NOT ON ALL MODELS Used to set the desired horizontal airflow direction RESET BUTTON Used prior to resetting time or after replacing batteries Disassembly of the parts Indoor unit Disassembly of the parts Indoor unit Warning Disconnect the unit from power supply before mak ing any checks Be sure the power switch is set to OFF To remove the Grille from the Chassis Set the up and down air discharge louver to open position horizontally by finger pressure Remove the securing screws To remove the Grille pull the lower left and right side of the grille toward you slightly tilted and lift it straight upward 1 To remove the sensor housing connect earth conductor amp step motor conductor with sen sor holder Motor Evaporator amp P C B Display P C B Conductor Sensor Conductor Motor Conductor Step Motor Conductor Con
12. filter if the unit is so equipped e There is risk of physical injury electric shock or product fail There is risk of fire electric shock or product damage ure Service Manual 5 Safety Precautions CAUTION Bi Installation check for gas refrigerant Install the drain hose to Keep level even when leakage after installation or ensure that water is drained installing the product repair of product away properly e Low refrigerant levels may cause fail A bad connection may cause water To avoid vibration or water leakage ure of product leakage Operational Use two or more people to lift Use a soft cloth to clean Do Do not touch the metal parts and transport the product not use harsh detergents sol of the product when removing vents etc the air filter They are very sharp Avoid personal injury There is risk of fire electric shock or There is risk of personal injury damage to the plastic parts of the prod Do not step on or put anyting on the product Do not insert hands or other objects through outdoor units the air inlet or outlet while the product is oper ated There is risk of personal injury and failure of product There are sharp and moving parts that could cause personal injury 6 Multi Air Conditioner Product Specifications l Product Specifications Opera
13. Air Temp 0 5 C 18 lt Intake Air Temp lt 22 C gt Intake Air Temp Intake Air Temp lt 18 C 218 When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule While in Fuzzy operation the airflow speed of the indoor fan is automatically selected according to the temperature B Fuzzy Operation H P Model When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the operation off the operation mode is selected When determining the operation mode the compressor the outdoor fan and the 4 way valve are off and only the indoor fan is operated for 15 seconds Then an operation mode is selected according to the intake air temp at that moment as follows 24 C lt Inatake Air Temp 2 Fuzzy Operation for Cooling 21 lt Inatake Air Temp lt 24 C 2 Fuzzy Operation for Dehumidification Inatake Air Temp 21 C 2 Fuzzy Operation for Heating If any of the operation modes among cooling dehumidification heating mode operations is carried out for 10 sec or longer before Fuzzy operation the mode before Fuzzy operation is operated 1 Fuzzy Operation for Cooling According to the setting temperature selected by Fuzzy rule when the intake air temp is 0 5 C or more below the setting temp
14. P No 3828A20156N Printed in Korea
15. Side 1 4 1 8kg m Liquid Side 3 8 4 2kg m Gas Side 1 2 5 5kg m Gas Side 5 8 6 6kg m 8 Wrap the insulation material around the con necting portion CAUTION Take care to arrange the pipings drain hose and cables as the right upper picture for inserting it into the indoor unit and refixing the tubing holder easily 44 Multi Air Conditioner Connecting cable Press the lower left and right side of the unit against the Installation Plate until the hooks engage with their slots sound click Drain hose Indoor unit WT nut Pipings Spanner Torque wrench Plastic bands Insulation material mee HM UU 2 qa Wrap the insulation material around the connecting portion Installation 9 Set the pipings and the connecting cable to the back of the chassis with the tubing holder Hook the edge of tubing holder to tap on chas sis and push the bottom of tubing holder to be engaged in the bottom of chassis 10 Indoor unit installation Hook the indoor unit onto the upper portion of installation plate Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate Ensure the hooks are properly seated on the installation plate by moving it in left and right SC Dram Press the lower left and right side of the unit against the Ins
16. d Cic y C06D 5 IL OUT A MICOM 1 01 CO2M 20020 8 16020 mae PCB 6870A90101A ASSY 6871420273 Display P C B Assen 14 Multi Air Conditioner Schematic Diagram iagram Schematic D Indoor Unit 1 L2 C242GL0 Option MOTOR VE DC PART STEPPING MOTOR V i INDOOR FAN pa 1214 13 f DE 6 5 4 3 8 OUT Kor Klbssoosar DISPLAY 12 SAMFORCE cnoiser Ro SIK R01G R04G venae na Po sofa Be es Ee Pe 220 g 7 6 les wa a2 x far 0 Ka mas 35 ana 34 E LED LeD2 220 LEDs 220 220 Operation SECH UPD780023AGC C Seep Timer Outdoor O ve vou enol RECENER 7 6 5 7 3 2 E as D r IS Qva our o puno pen Chance DUYUPTTG ag E FAV E ae 10940 1W 7005 NTC p 0020 S 4702560
17. lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further Jet Cool Mode Operation H P Model While in heating mode or Fuzzy operation the Jet Cool key cannot be input When it is input while in the other mode operation cooling dehumidification ventilation the Jet Cool mode is operated In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet Cool mode operation the room temperature is controlled to the setting temperature 18 C When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority When the Jet Cool key is input the upper lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further Service Manual 25 Operation Details Forced Operation Operation procedures when the remote control can t be used The operation will be started if the power button is pressed If you want to stop operation re press the button Heat pump Model Cooling Model Room Temp gt 24 21 lt Room Temp lt 24 Room Temp lt 21 C Operating mode Cooling Cooling Healthy Dehumidification Heating Indoor FAN Speed High High High High Setting Temperature 22 22 23 24 While in forced operation the key input by the remote control has no ef
18. B COMPA VASSJVSS 22 MICOM TMP87C846 COMP B 15 gt NEUTRAL 17 Service Manual Functions Functions Operation ON OFF by Remote controller Sensing the Room Temperature Room temperature sensor THERMISTOR Room temperature control Maintains the room temperature in accordance with the Setting Temp Starting Current Control Indoor fan is delayed for 5 seconds at the starting Time Delay Safety Control Restarting is inhibited for approx 3 minutes Indoor Fan Speed Control High Med Low Chaos Operation indication Lamps LED Lights up in operation 5 Lights up in Sleep Mode Lights up in Timer Mode Lights up in Deice Mode for Heat pump model OUT DOOR Lights up in Compressor operation for Cooling model Health Dehumidification Operation Intermittent operation of fan at low speed Sleep Modo Auto Deice defrost control Heating The fan is switched to low Cooling med Heating speed The unit will be stopped after 1 2 3 4 5 6 7 hours Both the indoor and outdoor fan stops during deicing Natural Air Control by CHAOS Logic Hot start after deice ends The fan is switched to intermittent or irregular operation Hot start Control Heating The fan speed is automatically switched from
19. B 730 at 7 5m Airflow Direction Control Up amp Down Remocon Type L C D Wireless Liquid 1 4 6 35 Service Valve Gas 1 2 12 7 Drain Hose O Plasma Filter Optional Connecting Cable 0 75mm Power Cord 2 5mm 8 Multi Air Conditioner Dimensions 1 Indoor Unit Dimensions Installation plate L2 C242GL0 L2 H242GL0 DIM mm 900 mm 285 mm 156 Service Manual 9 Dimensions 3 Mr Y N ls roin MODEL Bh L2 C242GL0 L2 H242GL0 mm 870 H mm 655 D mm 320 L1 mm 370 L2 mm 25 L3 mm 630 L4 mm 25 L5 mm 546 L6 mm 160 L7 mm 160 L8 mm 64 L9 mm 76 5 L10 mm 50 10 Multi Air Conditioner Refrigeration Cycle Diagram l Refrigeration Cycle Diagram 3 WAY VALVE Indoor Unit Outdoor Unit AR E D SIDE CAPILLARY TUBE l 2 WAY VALVE 79000 EXCHANGER EXCHANGER i CONDENSER 1 A UNIT B UNIT GAS SIDE B 2 L2 H242GLO0 __ Indoor Unit COOLING HEATING lt DEICE 2 E 1 i H HEAT 71 EXCHANGER
20. C WEBSITE http biz LGservice com Service Manual 59 Exploded View and Replacement Parts List 60 Multi Air Conditioner Exploded View and Replacement Parts List PART No gar DESCRIPTION REMARKS L2UC242GL0 137213 PANEL ASSY REAR 3720AP0003F R 430410 BASE ASSY OUTDOOR 3041AP2741G R 435311 GRILLE ASSY DISCHARGE OUTDOOR 3530A20007B R 435511 COVER ASSY CONTROL OUTDOOR 3551A20076C R 435512 COVER ASSY TOP OUTDOOR 3H03266K R 437210 PANEL ASSY FRONT SUB 3721A20005P R 447910 BARRIER ASSY OUTDOOR 4791A30004K R 546810 MOTOR ASSY AC 4681A20008D R 349600 MOUNT MOTOR 4960AP1361A R 552203 1 VALVE SERVIGE 2H01890P R 552203 2 VALVE SERVIGE 2H01890Q R 552203 3 VALVE SERVIGE 2H02479J R 554030 CONDENSER ASSY BEND 5403A20072E R 554160 COMPRESSOR ASSY SET 2520UKRK2BB R 559010 FAN ASSY PROPELLER 1A00195B R 649950 CONTROL BOX ASSY OUTDOOR 4995AP2615F R WOCZZ 1 CAPACITOR DRAWING 6120AR2194D R WOCZZ 2 CAPACITOR DRAWING 2A00986G R NOTE Please ensure GCSC since these parts may be changed depending upon the buyer s request GCSC WEBSITE hitp biz LGservice com Service Manual 61 Exploded View and Replacement Parts List 2 2 L2UH242GLO NS 62 Multi Air Condi
21. Turn the pipe end toward down to avoid the metal powder entering the pipe Caution If burrs are not removed they may cause a gas leakage 3 Flaring the pipes Insert the flare nuts mounted on the connection ports of both indoor and outdoor unit onto the copper pipes Some refrgerant gas may leak when the flare nuts are removed from the indoor unit as some gas is charged to prevent the inside of the pipe from rusting Fit the copper pipe end into the Bar of flare tool about 0 0 5mm higher See illustration Flare the pipe ends 4 Tape the flaring portion to protect it from the dust or damages 42 Multi Air Conditioner Pipe cutter 912 7 mm 1 2 gt 0 0 5 mm 09 52 mm 3 8 gt 0 0 5 mm 96 35 mm 1 4 0 0 5 mm Handle Bar ES Copper pipe Improper flaring Nan Inclined Surface Cracked Uneven damaged thickness When properly flared the internal surface flare will evenly shine and be of even thickness Since the flare part comes into contact with the connec tors carefully check the flare finish Installation 2 Connection of Pipings 1 Remove the installation plate Pull the two A marked portion of bottom of the chassis and pull the installation plate out of chas sis 2 Route the drain hose and the indoor tubing For left rear piping 3 Route the tubing and the drain hose straight backw
22. aft position Service port Shipping Closed Closed Closed with valve cap with valve cap with cap Air purging Open Closed Open 1 Installation counter clockwise clockwise push pin or with vacuum pump Operation Open Open Closed with valve cap with valve cap with cap Pumping down Closed Open Open Transfering clockwise counter clockwise connected manifold gauge Evacuation Open Open Open 3 Servicing with charging cylinder Gas charging Open Open Open 4 Servicing with charging cylinder Pressure check Open Open Open 5 Servicing with charging cylinder Gas releasing Open Open Open 6 Servicing with charging cylinder 28 Multi Air Conditioner 2 way 3 way Valve JU N Liquid side ate eZ 7 Hi handle CLOSE Outdoor unit Procedure 1 Confirm that both the gas side and liquid side valves are set to the open position Remove the valve stem caps and confirm that the valve stems are in the raised position Be sure to use a hexagonal wrench to operate the valve stems 2 Operate the unit for 10 to 15 minutes 3 Stop operation and wait for 3 minutes then con nect the manifold gauge to the service port of the gas side valve Connect the hose of the gauge with the push pin to the service port 4 Air purging of the charge hose Open the Low handle valve on the gauge slightly to air purge from the hose 5 Set the liquid
23. and the gas side valve are set to the closed position 2 After connecting the piping check the joints for gas leakage with gas leak detector 3 Remove the service port nut and connect the gauge manifold and the vacuum pump to the service port by the charge hose 4 Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below 76cmHg 5 Disconnect the charge hose and fit the nut to the service port Tightening torque 1 8kg m 6 Remove the valve stem nuts and fully open the stems of the 2 way and 3 way valves with a hexagon wrench 7 Tighten the valve stem nuts of the 2 way valve and 3 way valve Indoor unit Outdoor unit 50 Multi Air Conditioner Installation 7 Maximun Charge amount per 1m Capacity STANDARD CONNECTION TYPE Charge am t g Btu h LENGTH m A B per 1 7000 7 5 7 15 7 15 20 9000 7 5 7 15 7 15 20 12000 7 5 7 15 7 15 20 18000 7 5 10 20 10 20 20 24000 7 5 15 30 15 30 30 B Length INDOOR UNIT INDOOR UNIT A B mean indoor unit higher located than outdoor unit C D mean outdoor unit higher located than indoor unit OUTDOOR UNIT D Length CAUTION Capacity is based on standard length and maximum allowance length is on the basis of reliability Oil trap should be installed every 5 7 meters 16 4 23 0ft Service Manual 51 Installation 1 Connection of pow
24. ards see figure 4 Insert the connecting cable into the indoor unit through the piping hole Do not connect the cable to the indoor unit Make a small loop with the cable for easy con nection later To remove the holder press the bottom of the chassis near the holder upwards and the tab is clear of its hole Turn it clockwise approx 90 and remove it 5 Tape the tubing drain hose and the connecting cable Be sure that drain hose locates at the lowest side of the bundle Locating at the upper side can be a reason that drain water overflows drain pan inside the unit Gas side piping I Connecting cable Liquid side piping Drain hose Service Manual 43 Installation 6 Indoor unit installation Hook the indoor unit onto the upper position of the installation plate Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate Ensure the hooks are properly seated on the installation plate by moving it in left and right 7 Connecting the pipings to the indoor unit Align the center of the pipings and sufficiently tighten the flare nut with fingers Finally tighten the flare nut with torque wrench until the wrench clicks Wrench tightening the flare nut with forque wrench ensure the direction for tightening fol lows the arrows on the wrench Pipe Size Torque Liquid
25. ce is on pause the sleep timer mode cannot be input While in cooling mode operation 30 min later since the start of the sleep timer the setting temperature increases by 1 C After another 30 min elapse it increases by 1 C again When the sleep timer mode is input while in cooling cycle mode the airflow speed of the indoor fan is set to the low When the sleep timer mode is input while in heating cycle mode the airflow speed of the indoor fan is set to the medium Chaos Swing Mode By the Chaos Swing key input the upper lower vane automatically operates with the Chaos Swing or they are fixed to the desired direction While in Chaos Swing mode the angles of cooling and heating cycle operations are different Chaos Natural Wind Mode When the Chaos Natural Wind mode is selected and then operated the high medium or low speed of the air flow mode is operated for 2 15 sec randomly by the Chaos Simulation Jet Cool Mode Operation C O Model If the Jet Cool key is input at any operation mode while in appliance operation the Jet Cool mode operates In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet Cool mode operation the room temperature is controlled to the setting temperature 18 C When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority When the Jet Cool key is input the upper
26. d give rise to burn out of the wires 4 Specification of power source 5 Confirm that electrical capacity is sufficient 6 See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 7 Confirm that the cable thickness is as specified in the power sources specification Particularly note the relation between cable length and thickness 8 Never fail to equip a leakage breaker where it is wet or moist 9 The following troubles would be caused by voltage drop down Vibration of a magnetic switch damage on the contact point there of fuse breaking disturbance to the normal function of a overload protection device Proper starting power is not given to the compressor 46 Multi Air Conditioner 2 Connection of the cable 1 Remove the cover control from the unit by loosen ing the screw Connect the wires to the terminals on the control board individually as the following e L2 C242GL0 Terminal on the OUTDOOR UNIT 10 28 3191 3 pN 10 10 an 1 1 1 4 Pow r Cord Y 1 Y 3 128 10 3 AN 19 Terminal on the INDOOR UNIT Terminal on the INDOOR UNIT A UNIT B UNIT e L2 H242GL0 Terminal on the OUTDOOR UNIT HL AN 3 9 3 VAN 10 19 AN ger
27. drain piping x Accumulated Dope drai Tip of drain hoseyg Less than dipped in water 50mm gap E 2 wer Water Water Waving Wate _ leakage leakage 91 leakage Ditch Installation 5 Forn 1 Form the piping by wrapping the connecting por tion of the indoor unit with insulation material and secure it with two kinds of tapes If you want to connect an additional drain hose the end of the drain outlet should be routed above the ground Secure the drain hose appropriately 2 In cases where the outdoor unit is installed below the indoor unit perform the following B Tape the piping drain hose and connecting cable from down to up Secure the tapped piping along the exterior wall using saddle or equivalent Trap is required to prevent water from entering into electrical parts 3 In cases where the Outdoor unit is installed above the Indoor unit perform the following Tape the piping and connecting cable from down to up Secure the taped piping along the exterior wall Form a trap to prevent water entering the room B Fix the piping onto the wall by saddle or equivalent Seal a small opening around the pipings with gum type sealer Service Manual 49 Installation 6 Air Purgii The air which contains moisture remaining in the is refrigeration cycle may cause malfunction on the compressor 1 Confirm that both the liquid side valve
28. ductor Service Manual 55 Disassembly of the parts Indoor unit 2 To remove the Control Box Remove securing screws Pull the control box out from the chassis care fully 3 To remove the Discharge Grille Unhook the discharge grille and pull the dis charge grille out from the chassis carefully 4 To remove the Evaporator Remove 3 screws securing the evaporator at the left 2EA in the Eva Holder at the right 1EA 56 Multi Air Conditioner Unhook the tab on the right inside of the chas sis at the same time slightly pull the evapora tor toward you until the tab is clear of the slot 5 To remove the Motor Cover Remove 2 securing screw Pull the motor cover out from the chassis carefully 6 To remove the Cross Flow Fan Loosen the screw securing the cross flow fan to the fan motor do not remove Lift up the right side of the cross flow fan and the fan motor separate the fan motor from the cross flow fan Cross flow fan Beari Remove the left end of the cross flow fan from eating the self aligning bearing Service Manual 57 Exploded View and Replacement Parts List l Exploded View and Replacement Parts List 1 Indoor Unit L2NC122GHLO L2NH122GHLO 58 Multi Air Conditioner Exploded View and Replacement Parts List PART No s
29. e Check Fuse Outdoor PCB Ass y Check each load Indoor Outdoor Fan Motor Check Varistor Compressor Stepping Motor etc and contacting ZNR 1J Outdoor PCB Ass y condition of related connector Check the connection housing for contacting Connector related to CN POWER Display PWB Ass y Check 2 PCB Board Operation Check Items Content Remedy Power Transformer Outdoor unit About AC220V 240V 10 Check the power voltage Input Voltage About AC14 3V Replace Trans Output Voltage e DC 12V e IC01D 7812 Output e Replace ICO1D Indoor Outdoor unit DC 5V e IC02D 7805 Output Replace IC02D Indoor Outdoor unit Voltage of Micom No 2 e ICO1A KIA7036 Reset IC DC 4 5V over and Soldering condition Replace faulty parts X01 8MHz Service Manual 33 Electronic Parts Troubleshooting Guide 2 The produc Turn on Main Power UE While the compressor has been stopped the compressor does not operate owing to the delaying function for 3 minutes after stopped lI low speed by force When the compressor stopped Indoor Fan is driven by a low speed At this point the wind speed is not controlled by the remote controller When operated in the Sleeping Mode the wind speed is set to the d JE Cause by the remote control Caused by other parts except the remote contr
30. e intake air temp at that time 26 C lt Intake Air Temp D 25 24 C lt Intake Air Temp lt 26 C gt Intake Air Temp 1 C 22 C lt Intake Air Temp lt 24 C 2 Intake Air Temp 0 5 C 18 C lt Intake Air Temp lt 22 C gt Intake Air Temp Intake Air Temp lt 18 C 218 When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule While in Fuzzy operation the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidification operation 3 Fuzzy Operation for Heating According to the setting temperature selected by Fuzzy rule when the intake air temp is 3 or more above the setting temp the compressor is turned off When below the setting temp the compressor is turned on Compressor ON Temp 2 Setting Temp Compressor OFF Temp 2 Setting Temp 3 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to the intake air temp at that time 20 C lt Intake Air Temp gt Intake Air Temp 0 5 C Intake Air Temp lt 20 C D 20 C When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to t
31. ei DESCRIPTION REMARKS L2NC122GHLO L2NH122GHLO 131410 CHASSIS ASSEMBLY 3141A20005B 3141A20005B R 135311 GRILLE ASSEMBLY DISCHARGE INDOOR 3531A10192G 3531A10192D R 135316 GRILLE ASSEMBLY FRONT INDOOR 3531A21018D 3531A21018K R 135314 GRILLE ASSEMBLY INLET SUB 3530A10079A 3530A10079A R 135516 COVER ASSEMBLY MOTOR 3551A20050W 3551A20050A R 146811 MOTOR ASSEMBLY STEP 4681A20055A 4681A20055A R 152302 FILTER MEGH A G 5230A20014C 5230A20014C R 159830 AIR CLEANER ASSEMBLY 5983A10006U 5983A10006U R 159901 VANE HORIZONTAL 5990A20007A 5990A20007A R 249951 CONTROL BOX ASSEMBLY INDOOR 4995A20213C 4995A10072D R 263230 THERMISTOR ASSEMBLY 6323A20004A 6323A20004A R 267110 REMOTE CONTROLLER ASSY 6711A20069B 6711A20069C R 268712 PWB PCB ASSEMBLY DISPLAY 6871A20227D 6871A20194A R 268715 PWB PCB ASSEMBLY MAIN AC 6871A20239A 6871A20267A R 268716 PWB PCB ASSEMBLY MAIN DG 6871A20229K 6871A20266A R 342800 BEARING 4280A20004A 4280A20004A R 346810 MOTOR ASSEMBLY INDOOR 4681A20048D 4681A20048D R 35211B TUBE ASSEMBLY TUBING 5211AR7066N 5211AR7066Y R 352150 HOSE ASSEMBLY DRAIN 5251AR2575F 5251AR2575F R 354212 EVAPORATOR ASSEMBLY FINAL 5421A20087B 5421A20087E R 359011 FAN ASSEMBLY CROSS FLOW 5901A20007A 5901A20007A R 733010 PLATE ASSEMBLY INSTALL 1H00843A 1H00843A R WOCZZ CAPACITOR DRAWING 3H01487A 3H01487A R NOTE Please ensure GCSC since these parts may be changed depending upon the buyer s request GCS
32. er the system with liquid refrigerant turn off the air conditioner before disconnecting If the system can not be charged with the speci the hose fied amount of refrigerant it can be charged with a little at a time approximately 150g each time while operating the air conditioner in the cooling cycle however one time is not suffi cient wait approximately 1 minute and then repeat the procedure pumping down pin 5 Mount the valve stem nuts and the service port nut Use torque wrench to tighten the service port nut to a torque of 1 8 kg m 4 2kg m 5 5kg m Be sure to check for gas leakage Service Manual 31 Cycle Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1 Check temperature difference between intake and discharge air and operating current Temp Difference Operating Current Notice Temp difference Current approx 0 C less than 80 of rated current Temp difference Current approx 8 C less than 80 of rated current Temp difference Current less than 8 C over the rated current Temp difference over 8 C All amount of refrigerant leaked out Check refrigeration cycle Refrigerant leakage Clog of refrigeration cycle Defective compressor Excessive amount of refrigerant Normal Temperature difference between intake and discharge air depends on room air humidity When the roo
33. er supply 1 Connect the power supply cord to the inde pendent power supply 2 Prepare the remote control Insert two batteries provided Remove the battery cover from the remote con troller Slide the cover according to the arrow direction Insert the two batteries Two R03 or AAA dry cell batteries or equiv alent Be sure that the and directions are cor rect Be sure that both batteries are new Re attach the cover Slide it back into position 3 Operate the unit at cooling operation mode for fifteen minutes or more Battery Cover Settlement of Outdoor Unit Anchor the outdoor unit with a bolt and nut 10cm tightly and horizontally on a concrete or rigid mount When installing on the wall roof or rooftop anchor the mounting base securely with a nail or wire assuming the influence of wind and earth quake In the case when the vibration of the unit is con veyed to the house settle the unit with an anti vibration rubber 2 Evaluation of the performance 1 Measure the temperature of the intake and discharge air 2 Ensure the difference between the intake temperature and the discharge one is more than 8 C 52 Multi Air Conditioner Tubing connection Discharge air Operation Remote Controller Signal transmitter Transmits the signals to the room air conditioner V Signal transmitter
34. fect and the buzzer sounds 10 times to indicate the forced operation B Test operation During the TEST OPERATION the unit operates in cooling mode at high speed fan regardless of room temperature and resets in 18 1 minutes During test operation if remote controller signal is received the unit operates as remote controller sets If you want to use this operation open the front panel upward and Press the power button let it be pressed for about 3 seconds f you want to stop the operation re press the button Auto restart n case the power comes on again after a power failure Auto Restarting Operation is the function to oper ate procedures automatically to the previous operating conditions Air Cleaner Operation When an air cleaner function is selected during Air Conditioner operation Plasma air cleaner function will be operated while in any operation mode with selecting the function The function is to be stopped while it is operating with selecting the function When an air cleaner function is selected during operation off The function will be only operated When inlet grille of air conditioner is opened during plasma operation High Voltage Generator H V B is to be stopped When inlet grille of air conditioner is closed during plasma operation High Voltage Generator H V B will be operated again 26 Multi Air Conditioner Operation Details Remote Control Operation Mode When the remote cont
35. g heating mode operation or while in defrost control Cooling Mode Operation When the intake air temperature reaches 0 5 C below the setting temp the compressor and the outdoor fan stop When it reaches 0 5 C above the setting temp they start to operate again Compressor ON Temp gt Setting Temp 0 5 C Compressor OFF Temp gt Setting Temp 0 5 C While in compressor running operating with the airflow speed set by the remote control While in compressor not running operating with the low airflow speed regardless of the setting Healthy Dehumidification Mode When the dehumidification operation input by the remote control is received the intake air temperature 15 detected and the setting temp is automatically set according to the intake air temperature 26 lt Intake Air Temp 2 25 24 lt Intake Intake Air Temp lt 26 C 2 Intake Air Temp 1 C 18 C lt Intake Intake Air Temp lt 24 C 2 Intake Air Temp 0 5 C Intake Air Temp lt 18 C 2 18 C Service Manual 21 Operation Details While in compressor off the indoor fan repeats low airflow speed and pause While the intake air temp is between compressor on temp and compressor off temp 10 min dehumidifica tion operation and 4 min compressor off repeat Compressor ON Temp 2 Setting Temp 0 5 C Compressor OFF Temp 2 Setting Temp 0 5 C In 10 min dehumidification operation the indoor fan operates with the low airflow speed Heating Mode Opera
36. he Fuzzy rule While in Fuzzy operation the airflow speed of the indoor fan is set to the high or the medium according to the intake air temperature and the setting temperature Airflow Speed Selection The airflow speed of the indoor fan is set to high medium low or chaos auto by the input of the airflow speed selection key on the remote control On Timer Operation When the set time is reached after the time is input by the remote control the appliance starts to operate The timer LED is on when the on timer is input It is off when the time set by the timer is reached If the appliance is operating at the time set by the timer the operation continues 24 Multi Air Conditioner Operation Details E Off Timer Operation When the set time is reached after the time is input by the remote control the appliance stops operating The timer LED is on when the off timer is input It is off when the time set by the timer is reached If the appliance is on pause at the time set by the timer the pause continues E Off Timer lt gt On Timer Operation When the set time is reached after the on off time is input by the remote control the on off timer operation is carried out according to the set time Sleep Timer Operation When the sleep time is reached after 1 2 3 4 5 6 7 0 cancel hr is input by the remote control while in appli ance operation the operation of the appliance stops While the applian
37. high to low speed The indoor fan stops until the Airflow Direction Control evaporator piping temperature will be reached at 22 C The louver can be set at the desired position or swing up and down automatically 18 Multi Air Conditioner Functions Remote Controller Operation ON OFF gt Operation Mode Selection oe Cooling Operation Mode Auto Operation Mode model oy Healthy Dehumidification Operation Mode Heating Operation Mode Fan Speed Selection K L M High HA ROS Room Temperature Display High 39 Low 11 C Temperature Setting EE LOW G Seeing m Down to 18 Heating __ Down to 16 C Up to 30 C to 30 C PLASMA Option NEGATIVE ION Option PLASMA Setting the Time or Timer v O a 0 0 Timer Selection ON D OFF 0 0 Timer Setting ST OFF ON OFF a 1 Timer Cancel CANCEL Sleep Operation Cancel Sleep Mode Timer ON or Timer OFF Airflow Direction Control 1 2 8 4 5 6 7 Off Timer Fan Operation Mode Fan Operates without cooling or heating Horizontal Airflow Direction Control Button Option AN RESET Service Manual 19 Display Function 1 Heating Model 2 Cooling Model Opera
38. l cause harm or damage The seriousness is Classified by the following indications WARNING This symbol indicates the possibility of death or serious injury ACAUTION This symbol indicates the possibility of injury or damage Meanings of symbol used in this manual are as shown below Q Be sure not to do Qo Be sure to follow the instruction WARNING Bi Installation Do not use defective or Do not let the air conditioner Always ground the product underrated circuit breaker run for long time when the Use this appliance on dedi humidity is very high and cated circuit door or a window is left open There is risk of fire or electric shock Moisture may condense and wet or There is risk of fire or electric shock damage furniture Install the panel and the cover Always install a dedicated cir Use the correctly rated break of control box securely cuit and breaker er or fuse There is risk of fire or electric shock Improper wiring or installation may There is risk of fire or electric shock cause fire or electric shock Service Manual 3 Safety Precautions Do not modify or extend the Do not install remove or re Be cautious when unpacking power cable install the unit by yourself and installing the product customer There is risk of fire or electric shock There is risk of fire electric shock Sharp edges could cause injury Be exp
39. llation 2 Indoor Unit Installation The mounting wall should be strong and solid enough to protect it from the vibration 1 Mount the installation plate on the wall with four Type A screws If mounting the unit on the concrete wall consid er using anchor bolts Always mount the Installation plate horizontally Type A screw eng one by aligning the marking off line by means of the Thread thread and level Weight The lower left and the right side of 2 Drill the piping hole with 70mm dia holecore Installation Plate drill Line according to the arrows marked on lower the left and the rght side of the Installation Plate The meeting point of the extended line is the Left rear piping center of the hole Drill the piping hole at either the right the left and the hole should be slightly slant to the out m door side J 50mm g 70mm 70mm Right rear piping Omm Wall Indoor Outdoor x 5 7mm Service Manual Installation 1 Preparation of pipings 1 Cut the pipes and the cable Use the accessory piping kit or the pipes pur chased locally Measure the distance between the indoor and the outdoor unit Cut the pipes a little longer than the measured distance Cut the cable 1 5m longer than the length of the pipe 2 Remove burrs Remove burrs from cut edges of pipes
40. losion or injury especially careful of the case edges and the fins on the condenser and evaporator Q 22 de For installation always con Do not install the product sure the installation area tact the dealer or an defective installation stand does not deteriorate with age Authorized Service Center There is risk of fire electric shock e It may cause injury accident or dam If the base collapses the air condition explosion or injury age to the product er could fall with it causing property damage product failure and personal injury 2 fot J KON i 2 Operational Do not touch operate the Do not place a heater or other not allow water to run into product with wet hands appliances near the power electric parts cable There is risk of fire or electrical shock There is risk of fire and electric shock It may cause There is risk of fire fail ure of the product or electric shock 4 Multi Air Conditioner Safety Precautions Do not store or use flammable gas or com If strange sounds or smell or smoke comes bustibles near the product from product Turn the breaker off or discon nect the power supply cable There is risk of fire or failure of product There is risk of electric shock or fire Do not open the inlet grille of the product dur Be cautious that water could not enter the ing operation Do not touch the electrostatic product
41. m NN website http www lgservice c Se G e mail http www lgeservice Ji LG Multi Type Air Conditioner p html NIT READ THE SAFETY ANUAL D SERVICE PERSONNEL Multi Air Conditioner Service Manual TABLE OF CONTENTS Safety PrecaUllbhs aa ae 3 Product Speclficaltlotis 5 Ute eit t c hestene hanne 7 Dimensions u qasa das 9 Refrigeration Cycle Diagram A 11 Wiring Dlagraln noto to hD mOn GE 12 Electronic Control Device spenna aapea aa aaae inden haute 13 Schematic E Le LEE 15 FUNCUONS Scent NE 18 Operation Details re a Riduci eder pk c veut e Re ape ange 21 PE ETE T A 28 Cycle Troubleshooting G id soirs eg EE Aae 32 Electronic Parts Troubleshooting Guide AA 33 NERS VAM REN ON enne M a 41 Operation octo etie uten oin dandus tu 53 Disassembly of the parts Indoor unt 55 Exploded View and Replacement Parts List sss 58 2 Multi Air Conditioner Safety Precautions Il Safety Precautions To prevent injury to the user or other people and property damage the following instructions must be followed Incorrect operation due to ignoring instruction wil
42. m air humidity is relativery higher temperature difference is smaller When the room air humidity is relatively lower temperature difference is larger 2 Check temperature and pressure of refrigeration cycle Suction pressure Compared with the normal value Temperature Compared with the normal value Cause of Trouble Description High Defective compressor Current is low Defective 4 way reverse valve Higher Normal Excessive amount of High pressure does not quickly refrigerant rise at the beginning of operation Insufficient amount of Current is low Lower Higher refrigerant Leakage Clogging Current is low Notice 1 The suction pressure is usually 4 5 6 0 kg cm G at normal condition 2 The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty 32 Multi Air Conditioner Electronic Parts Troubleshooting Guide Il Electronic Parts Troubleshooting Guide 1 The Out Refer to Electronic Control Device drawing and Schematic diagram Turn off Main Power IE After 10 seconds Turn on Main Power Does beeping sound is made from the Indoor Unit EL Check the voltage of power About AC 220V AC240V 50Hz Primarily the operating condition of Micom is OK Main power s voltage Voltage applied to the unit JL Connecting method of Indoor Outdoor connecting cabl
43. ng of remocon Simultanueous operation of operating mode Kl cooling and heating 5times E Poor communication Communication line circuit check 4 3566 P Check indoor fan Indoor fan lock motor and outdoor PCB ass y 20 Multi Air Conditioner Operation Details Operation Details Main Unit F 1 C O Model Operation Indicator On while in appliance operation off while in appliance pause Flashing while in disconnection or short in Thermistor 3 sec off 0 5 sec on Sleep Timer Indicator On while in sleep timer mode off when sleep timer cancel or appliance operation pause Timer Indicator On while in timer mode on off off when timer mode is completed or canceled Comp Running Incidator While in appliance operation on while in outdoor unit compressor running off while in compressor off 2 H P Model Operation Indicator On while in appliance operation off while in appliance pause Flashing while in disconnection or short in Thermistor 3 sec off 0 5 sec on Sleep Timer Indicator On while in sleep timer mode off when sleep timer cancel or appliance operation pause Timer Indicator On while in timer mode on off off when timer mode is completed or canceled Defrost Indicator Off except when hot start durin
44. ol d When the mark 3 is displayed in LCD screen replace battery d d When the detect switch double key inside the remote controller door is fault it is impossible to operate temperature regulating A W and wind speed selecting Check the contact of CN DISPI connector lE d Check DISP PWB Ass y Voltage between CN DISP1 DC 5V Check the connecting circuit between the remote con troller MICOM No R17 2Q IR LED Q1 R16 2 2KQ Check point 34 Multi Air Conditioner Check the connecting circuit between PIN RO1L 1K CO1L 680PF MICOM PIN Check Receiver Ass y Electronic Parts Troubleshooting Guide 3 When coolin Turn on Main Power d Operate Cooling Mode by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1 C at least d When in Air Circulation Mode Compressor Outdoor Fan is stopped d Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger EVA d When the sensor circuit for indoor temperature and connector are in bad connection or are not engaged Compressor Outdoor Fan is stopped Check the related circuit of RO2H 12 1K RO1H 1 0K RO4H 6 2k RO3H 1 0K Indoor unit
45. on LED on display and indoor fan outdoor fan COMP are not operated The unit can be reoperated by On Off control of Remocon Service Manual 39 Installation Installation 1 Selection of the best location 1 Indoor unit There should not be any heat source or steam gt Left near the unit gt SCH There should not be any obstacles to prevent Rear left the air circulation A place where air circulation in the room will be good A place where drainage can be easily obtained Down right place where noise prevention is taken into consideration Do not install the unit near the door way Ensure the spaces indicated by arrows from the wall ceiling fence or other obstacles 2 Outdoor unit If an awning is built over the unit to prevent direct sunlight or rain exposure be careful that heat radiation from the condenser is not restricted There should not be any animals or plants TE which could be affected by hot air discharged More than 20 cm Seta ene Ensure the spaces indicated by arrows from a the wall ceiling fence or other obstacles 24 More than 70 cm 3 Piping length and the elevation Indoor unit Capacity Pipe Size Max piping Btu h length Elevation A un GAS LIQUID B m 10 12K 1 2 3 8 1 4 15 7 B Outdoor unit 40 Multi Air Conditioner Insta
46. rol is selected by the slide switch on the main unit the appliance operates according to the input by the remote control Protection of the evaporator pipe from frosting e f the indoor pipe temp is below 0 C in 7 min after the compressor operates without any pause while in cool ing cycle operation mode the compressor and the outdoor fan are turned off in order to protect the indoor evaporator pipe from frosting When the indoor pipe temp is 7 C or higher after 3 min pause of the compressor the compressor and the outdoor fan is turned on according to the condition of the room temperature Buzzer Sounding Operation When the appliance operation key is input by the remote control the short beep beep sounds When the appliance pause key is input by the remote control the long beep sounds When a key is input by the remote control while the slide switch on the main unit of the appliance is on the forced operation position the error sound beep beep beep beep beep is made 10 times to indicate that the remote control signal cannot be received Service Manual 27 2 way 3 way Valve l 2 way 3 way Valve 2 way Valve Liguid Side 3 way Valve Gas Side Hexagonal wrench 4mm Open position Closed position Flare nut To iping connection To outdoor unit connection port cap port Service To outdoor unit Works Shaft position Sh
47. side valve to the closed position Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm g Immediately set the gas side valve to the closed position Do this quickly so that the gauge ends up indi cating 1 Disconnect the charge set and mount the liquid side and gas side valve caps and the service port nut Use torque wrench to tighten the service port nut to a torque of 1 8kg m 4 2kg m 5 5kg m Be sure to check for gas leakage Service Manual 29 2 way 3 way Valve All amount of refrigerant leaked TU N Liquid side uu Outdoor unit J SW Gas side F 1 LUZ manifold gauge Low 0 0 Vacuum pump On handle vg V OPEN Hi handle CLOSE Procedure 1 Confirm that both the liguid side valve and gas 7 Disconnect the charge hose from the vacuum side valve are set to the opened position 2 Connect the vaccum pump to the center hose of the manifold gauge 3 Connect the service port of the gas side valve to 8 the low side of the gauge 4 Connect power supply to outdoor unit 5 Evacuation for approximately one hour Confirm that the gauge needle has moved toward 76 cmHg vacuum of 4 mmHg or less 6 Close the Low handle of the gauge turn off the vacuum pump and confirm that the gauge nee dle does not move approximately 5 minutes after turning off the
48. tallation Plate until the hooks engages with their slots sound click Service Manual 45 Installation 3 Connecti 1 Connecting the pipings to the Outdoor unit 1 Align the center of the pipings and sufficiently tighten the flare nut with fingers 2 Finally tighten the flare nut with torque wrench until the wrench clicks When tightening the flare nut with torque wrench ensure the direction for tightening follows the Outdoor unit arrow on the wrench B UNIT Pipe Size Torque i gt gt Liquid side piping Liquid Side 1 4 1 8kg m Liquid Side 3 8 4 2kg m Gas Side 1 2 5 5kg m Torque wrench Gas Side 5 8 6 6kg m A CAUTION After the confirmation of the above conditions prepare the wiring as follows 1 Never fail to have an individual power specialized for the air conditioner As for the method of wiring be guided by the circuit diagram pasted on the inside of control box cover 2 The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact separation of at least 3mm in each active phase conductors 3 The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation Check them and make sure that they are all tightly fastened If they are loose it coul
49. the compressor is turned off When 0 5 C or more above the setting temp the compressor is turned on Compressor ON Temp gt Setting Temp 0 5 C Compressor OFF Temp 2 Setting Temp 0 5 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to the intake air temp at that time 26 C lt Intake Air Temp D 25 24 C Intake Air Temp lt 26 C 2 Intake Air Temp 1 22 lt Intake Air Temp lt 24 C gt Intake Air Temp 0 5 C 18 C lt Intake Air Temp lt 22 C gt Intake Air Temp Intake Air Temp lt 18 C 218 When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule While in Fuzzy operation the airflow speed of the indoor fan is automatically selected according to the tem perature Service Manual 23 Operation Details 2 Fuzzy Operation for Dehumidification According to the setting temperature selected by Fuzzy rule when the intake air temp is 0 5 C or more below the setting temp the compressor is turned off When 0 5 C or more above the setting temp the compressor is turned on Compressor ON Temp 2 Setting Temp 0 5 C Compressor OFF Temp D Setting Temp 0 5 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to th
50. tical Louver is normally geared with the shaft of Stepping Motor If the regular torque is detected when rotating the Vertical Louver with hands Normal Check the connecting condition of CN U D Connector Check the soldering condition on PWB of CN U D Connector s Check the operating circuit of the Vertical Louver Confirm that there is DC 12V between pin RED of CN U D and GND It If there are no problems after above checks Confirm the assembly conditions that catching and interfering parts in the rotation radial of the Vertical Louver Service Manual 37 Electronic Parts Troubleshooting Guide 6 When Heatir Turn ON Main Power gt Operate Heating Mode by setting the desired temperature of the remote control is higher than one of the indoor temperature by 2 C at least JL In heating Mode the indoor fan operates in case the pipe temperature is higher than 28 C Check the connector of intake and pipe sensor thermistors e Check the related circuit of RO2H 12 1K RO1H 1 0K RO4H 6 2k RO3H 1 0K Check the indoor room temperature is disconnected or not about 10KQ at 25 C Check the indoor pipe temperature is disconnected or not about 5KQ at 25 C Check the DC voltage on the PWB ASS Y The details of check are as followings
51. tion Hem Unit A or B unit A B unit Cooling Capacity Btu h kcal h 12 000 3 517 24 000 7 034 Moisture Removal l h 1 4 1 4x2 Power Source V Hz 1 220 60HZ Indoor 8 5 Air Circulation m min Outdoor 42 Indoor 39 35 31 Noise Level Hi Med Low dB A Outdoor 54 Input W 1 250 2 350 Runnig Current A 5 8 10 8 E E R Btu h w 9 6 10 21 Indoor 10 0 Motor Output Outdoor 90 Indoor 2 1 Dimensions W x H x D mm ES Outdoor 870 x 655 x 320 Indoor 8 Net Weight kg Outdoor 61 Refrigerant R 22 g A 750 B 750 at 7 5m Airflow Direction Control Up amp Down Remocon Type L C D Wireless Liquid 1 4 6 35 Service Valve Gas 1 2 12 7 Drain Hose Plasma Filter Optional Connecting Cable 1 5mm Power Cord 2 5mm Service Manual Product Specifications Cooling Heating Operation Item Unit A or B unit A B unit Cooling Capacity Btu h kcal h 12 000 3 517 24 000 7 034 Moisture Removal l h 1 4 1 4 x 2 Power Source g V Hz 10 220 60HZ Indoor 8 5 Air Circulation m min Outdoor 42 Indoor 39 35 31 Noise Level Low dB A Outdoor 54 Input W 1 250 1 150 2 300 2 150 Runnig Current A 5 8 5 3 10 8 9 7 E E R Btu h w 9 60 10 43 Indoor 10 0 Motor Output Outdoor 90 Indoor 2 1 Dimensions W x H x D mm Outdoor 870 x 800 x 320 Indoor 8 Net Weight kg Outdoor 61 Refrigerant R 22 g A 730
52. tion H P model When the intake air temp reaches 3 above the setting temp the compressor is turned off When below the setting temp the compressor is turned on Compressor ON Temp 2 Setting Temp Compressor OFF Temp 2 Setting Temp 3 e While in compressor on the indoor fan is off when the indoor pipe temp is below 20 C when above 28 it operates with the low or setting airflow speed When the indoor pipe temp is between 20 C and 28 C it oper ates with Super Low while in sleep mode with the medium airflow speed While in compressor off the indoor fan is off when the indoor pipe temp is below 33 C when above 35 C it operates with the low airflow speed If overloaded while in heating mode operation in order to prevent the compressor from OLP operation the outdoor fan is turned on off according to the indoor pipe temp While in defrost control both of the indoor and outdoor fans are turned off Defrost Control H P model Defrost operation is controlled by timer and sensing temperature of outdoor pipe The first defrost starts only when the outdoor pipe temperature falls below 6 C after 45 minutes passed from starting of heating operation and more than 10 minutes operation of compressor Defrost ends after 9 6 minutes passed from starting of defrost operation or after the outdoor fan operates within max 2 minutes 30 seconds when the outdoor pipe temperature rises over 12 C even it before 12 min utes
53. tion Indicator D Operation Indicator OD Cooling Soft Dry Fan Heating Cooling Soft Dry Fan Sleep Timer Indicator X Sleep Timer Indicator X Sleep Mode Sleep Mode Timer Indicator Q Timer Indicator Timer Mode Timer Mode Defrost Indicator X Compressor on Indicator DOOR Hot start Defrost Self diagnosis Fi Bi Error Indicator The function is to self diagnoisis airconditioner and express the troubles identifically if there is any trouble Error mark is ON OFF for the operation LED of evaporator body in the same manner as the following table If more than two troubles occur simultaneously primarily the highest trouble fo error code is expressed After error occurrence if error is released error LED is also released simultaneously To operate again on the occurrence of error code 12 be sure to pull out power cord and then re insert Having or not of error code is different from Model Error LED Indoor body operation LED Error contents SVC check point Indoor suction temperature thermistor open short Indoor TH ass y check E Pi gt Indoor pipe temperature 3sec 3sec 3sec thermistor open short once twice Outdoor suction temperature thermistor open short Outdoor TH ass y Outdoor pipe temperature check sesch sesch thermistor enden 3times Abnormal operation of multi product Resetti
54. tioner Exploded View and Replacement Parts List PART No pi E DESCRIPTION gt REMARKS L2UH242GLO 137213 1 PANEL ASSY SIDE L 1A00201D R 137213 2 PANEL ASSY SIDE R 3A02284M R 437212 GRILLE REAR 1A00207B R 268711 PWB PCBJASSY MAIN OUTDOOR 6871A20273A R 430410 BASE ASSY OUTDOOR 3041AP2741G R 435311 GRILLE ASSY DISCHARGE OUTDOOR 3530A20007J R 435511 COVER ASSY CONTROL OUTDOOR 3551A20076E R 437210 PANEL ASSY FRONT SUB 3721A20004L R 447910 BARRIER ASSY OUTDOOR 4791A30004C R 546810 MOTOR ASSY AC 4681A20008D R 349600 MOUNT MOTOR 4960AP1361A R 552203 1 VALVE SERVICE 2H01890P R 552203 2 VALVE SERVICE 2H01890Q R 552208 3 VALVE SERVICE 2H02479J R 554030 CONDENSER ASSY BEND 5403A20072X R 554160 COMPRESSOR ASSY SET 2520UKRK2BB R 559010 FAN ASSY PROPELLER 1A00195B R 561410 1 COIL ASSY REVERSING 6141AR3509T R 561410 2 COIL ASSY REVERSING 6141AR3509S R 649950 CONTROL BOX ASSY OUTDOOR 4995A10071A R WOCZZ 1 CAPACITOR DRAWING 6120AR2194D R WOCZZ 2 CAPACITOR DRAWING 2A00986G R 435512 COVER ASSY TOP OUTDOOR 3H03266L R 263230 THERMISTOR ASSEMBLY 6323A20002A R 552202 VALVE REVERSING 5220AR3084A R NOTE Please ensure GCSC since these parts may be changed depending upon the buyer s request GCSC WEBSITE http biz LGservice com Service Manual 63 Q LG Electronics Inc January 2005
55. trol board individually according to the outdoor unit con nection Ensure that the color of the wires of outdoor unit and the terminal No are the same as those of indoor unit respec tively Refer to Wiring diagram on page12 WARNING Be sure to refer to the wiring diagram label inside the cover control and carry out the correct field wiring Wrong wiring can cause the unit to misoperate to result in a fire hazard Check local electrical codes and any specified wiring instructions or limitations 2 Attach the Grille onto the cabinet Grasp lower the left and right side of the Grille and engage four tabs on the top inside edge of the chassis Press the Grille toward the chassis until it will be back into place 48 Multi Air Conditioner 1 To remove the front panel from the indoor unit remove the front panel from the indoor unit cabinet Set the air direction louvers up and down to the posi tion horizontally by hand Remove the securing screws that retain the front panel Pull the lower left and right sides of the grille toward you and lift it off Screw 2 To check the drainage Pour a glass of water on the evaporator B Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit 3 Drain piping B The drain hose should point downward for easy drain flow Downward slope Do not make
56. vacuum pump 30 Multi Air Conditioner pump Vacuum pump oil If the vacuum pump oil becomes dirty or deplet ed replenish as needed Mount the valve caps and the service port caps 2 way 3 way Valve 3 Gas Char After Evacuation Outdoor unit Charging cylinder Low handle ZZ yz Check valve OPEN Hi handle CLOSE Procedure 1 Connect the gauge to the charging cylinder Connect the charge hose which you disconnect ed from the vacuum pump to the valve at the 4 Immediately disconnect the charge hose from the gas side valve s service port bottom of the cylinder This is different from previous procedures If you are using gas cylinder also use a scale Because you are charging with liquid refrigerant and reverse the cylinder so that the system can from the gas side absolutely do not attempt to be charged with liquid charge with larger amounts of liquid refrigerant 2 Purge the air from the charge hose while operating the air conditioner Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air Be careful of the liquid refrigerant The topping partwey will allow Merde hee charged procedure is the same if using a gas cylinder If the system has been charged with liquid 3 Open the low handle on the gauge and charge refrigerant while operating the air condition
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