LG Electronics A2UC243FA0 (LMU240CE) manual

LG Multi Type Air Conditioner SERVICE MANUAL LG CAUTION website http://www.lgservice.com • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL. MODEL • Indoor Unit: • Outdoor Unit: A2UH243FA0(LMU240HE) A2UC243FA0 (LMU240CE) Room Type AMNH093D4A0(LMN090HE) AMNH123DEA0 (LMN120HE) AMNC[...]

2 Multi type Air Conditioner Multi type Air Conditioner Ser vice Manual T ABLE OF CONTENTS Model Number Nomenclature .................................................................................................................... 3 Symbols Used in this Manual ......................................................................................[...]

Ser vice Manual 3 Model Number Nomenclature Model Number Nomenc lature Indoor Unit Outdoor Unit AMN H 3 09 4 DA 0 Serial Number A2U H 3 24 F A 0 Electrical Ratings MPS Variable Multi System Indoor Unit Model Type H: Heat Pump C: Cooling Only Ex) 9,000 Btu/h '09', 12,000 Btu/h '12' Nominal Cooling Capacity in Btu/h Electrical Rat[...]

4 Multi type Air Conditioner Model Number Nomenclature Combination table Operation 1 Unit 2 Unit Combination of Indoor Unit(kBtu/h) Cooling Each Capacity Unit-A Unit-B UNIT-A(Btu/h) UNIT-B(Btu/h) Total Btu/h kW UNIT-A(Btu/h) UNIT-B(Btu/h) Btu/h kW Total Capacity Each Capacity Total Capacity Heating 9 12 9 9 12 9 12 12 9 12 18 21 24 9000 12000 9000 [...]

Ser vice Manual 5 Saf ety Precautions Safety Precautions T o pre v ent injur y to the user or other people and proper ty damage, the f ollowing instructions must be f ollowed. ■ Incorrect operation due to ignoring instruction will cause har m or damage. The seriousness is classified by the f ollo wing indications. ■ Meanings of symbols used in [...]

6 Multi type Air Conditioner Saf ety Precautions Do not modify or extend the power cab le . • There is risk of fire or electric shock. Do not install, remove, or re- install the unit by y our self (customer). • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpac king and installing the product. • Sharp edges co[...]

Ser vice Manual 7 Saf ety Precautions Do not allow water to run into electric parts. • It may cause There is risk of fire, failure of the product, or electric shock. Do not store or use flammable gas or combustib les near the product. • There is risk of fire or failure of product. Do not use the product in a tightly c losed space for a long tim[...]

8 Multi type Air Conditioner Saf ety Precautions Do not open the inlet grill of the pr oduct during operation. (Do not touch the elec- trostatic filter , if the unit is so equipped.) • There is risk of physical injury, electric shock, or product failure. When the product i s soaked (flooded or submerged), contact an A uthorized Ser vice Center . [...]

Ser vice Manual 9 Saf ety Precautions Do not bloc k the inlet or outlet of air flow . • It may cause product failure. U s eas o f tc l o t ht oc l e a n .D o not use harsh deter gents, sol- vents, etc. • There is risk of fire, electric shock, or damage to the plastic parts of the product. Do not touch the metal parts of the product when remo vi[...]

10 Multi type Air Conditioner Saf ety Precautions D on o ts t e po no rp u ta n y t i n g on the product. (outdoor units) • There is risk of personal injury and failure of product. Alwa ys inser t the filter secure- ly . Clean the filter every two weeks or more often if neces- sary . • A dirty filter reduces the efficiency of the air conditione[...]

Ser vice Manual 11 Dimensions Dimensions Indoor Unit 1. Split T ype Indoor 2. Ar t Cool T ype Indoor Unit Pipe Hole Fix Hole Hanger Hole H W D Installation plate D H W W mm 840 895 570 H mm 270 282 568 D mm 153 165 129 Model Dimension S p l i t Ty p e A R T C O O L Ty p e S4 SE 9 kBtu/h 12 kBtu/h 9 kBtu/h 12 kBtu/h SP3[...]

12 Multi type Air Conditioner Outdoor Unit W D L1 L2 L4 L3 H L7 L5 L6 W mm 870 H mm 800 D mm 320 L1 mm 370 L2 mm 25 L3 mm 775 L4 mm 25 L5 mm 546 L6 mm 160 L7 mm 160 UE1 24kBtu/h MODEL DIM Dimensions[...]

Ser vice Manual 13 Product Specifications Pr oduct Specifications Indoor Unit Nominal Cooling Capacity kcal/h(W) Btu/h Nominal Heating Capacity kcal/h(W) Btu/h Air Circulation H/M/L CMM(CFM) Setting temperature range(cool/heat) ° C Fan motor Output W Model Input V Running Current A Fan Type No. Used / Diameter EA/inch(mm) Noise Level (Sound Press,[...]

14 Multi type Air Conditioner Outdoor Unit - Multiple piping models Product Specifications Notes: 1. Capacities are based on the following conditions: Cooling: -Indoor Temperature 26.7 ° C(80.1 ° F)DB/19.4 ° C66.9 ° F)WB -Outdoor Temperature 35 ° C(95 ° F)DB/23.9 ° C(75 ° F)WB -Interconnecting Piping Length 7.5m -Level Difference of Zero. H[...]

Ser vice Manual 15 Installation Installation Type "A" screw and plastic anchor Type "B" screw Remote Control Holder Installation plate Figure Figure Name Screw driver Electric Drill Measuring Tape, Knife Hole Core Drill Spanner Torque wrench Ohmmeter Hexagonal wrench Ammeter Gas Leak Detector Thermometer, Level Flaring Tool Set [...]

Installation 16 Multi type Air Conditioner Indoor unit 1. Do not hav e any heat or steam near the unit. 2. Select a place where there are no obstacles in front of the unit. 3. Make sure that condensation dr ainage can be conv e- niently routed aw a y . 4. Do not install near a doorwa y . 5. Ensure the spaces indicated by arro ws from the wall, ceil[...]

Ser vice Manual 17 Installation Multi Piping T ype Piping length and elev ation 24k 30m(100ft) 15m(50ft) 3m(10ft) 7.5m(25ft) 7.5m(25ft) Capacity(Btu/h) Max total length of all pipes (A+B) Max length of each pipe (A/B) M i nl e n g t ho fe a c h pipe (A/B) Max Ele vation between each indoor unit and out- door unit (h1) Max ele vation between indoor [...]

18 Multi type Air Conditioner Installation The wall you select should be strong and solid enough to prevent vibration 1. Mount the installation plate on the wall with type "A" screws. If mounting the unit on a concrete wall, use anchor bolts. • Mount the installation plate horizontally by aligning the centerline using a level. 2. Measur[...]

Ser vice Manual 19 Installation Preparing w ork for Installation (Artcool T ype Only) Open panel front 1. First, push the front panel backward and lift it up to remove the two screws. 2. The moment of lifting the both lower parts of panel front, you can hear sound this panel came out, In this time panel front is separated 3. After pull down this pa[...]

20 Multi type Air Conditioner Installation ■ Sticking the installation guide map and fixing Indoor unit ■ Drill a hole in the wall • Drill the piping hole with a ø 50mm hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side. Plastic anchors INST ALLA TION GUIDE MAP 10mm INST [...]

Ser vice Manual 21 Flaring Work and Connection of Piping Flaring w ork Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure. Cut the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased locally. 2. Measure the distance between the indoor and the outdoor unit. 3[...]

22 Multi type Air Conditioner Flaring Work and Connection of Piping Check 1. Compare the flared work with the figure by. 2. If a flared section is defective, cut it off and do flaring work again. Indoor 1. Prepare the indoor unit's piping and drain hose for installation through the wall. 2. Remove the plastic tubing retainer(see the illustrati[...]

Ser vice Manual 23 Flaring Work and Connection of Piping 4. Indoor unit installation Hook the indoor unit onto the upper portion of the installa- tion plate.(Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installa- tion plate by moving it left [...]

24 Multi type Air Conditioner Flaring Work and Connection of Piping 1. Route the indoor tubing and the drain hose to the required piping hole position. 2. Insert the piping, drain hose, and the connecting cable into the piping hole. 3. Insert the connecting cable into the indoor unit. • Don't connect the cable to the indoor unit. • Make a [...]

Ser vice Manual 25 Flaring Work and Connection of Piping Wrap the insulation material around the connecting por- tion. 1. Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there may be no gap. 2. Wrap the area which accommodates the rear piping hous- ing section[...]

26 Multi type Air Conditioner Flaring Work and Connection of Piping ■ P anel Assembly(Art Cool T ype only) 1. First, Check the side cover assembly exactly, Fix power cord in the bottom groove of cover side left. 2. Assemble connecting lead wire with controller and first fix the upper part of panel front, then match the lower part of panel front 3[...]

Ser vice Manual 27 Installation Information. For left piping. Follow the instruction below. Good case • Press on the upper side of clamp and unfold the tubing to downward slowly. Bad case • Following bending type from right to left may cause damage to the tubing. Flaring Work and Connection of Piping[...]

28 Multi type Air Conditioner Flaring Work and Connection of Piping Remove the battery cover from the remote con- troller. • Slide the cover according to the arrow direction. Insert the two batteries. • Be sure that the (+) and (-) directions are correct. • Be sure that both batteries are new. Re-attach the cover. • Slide it back into posit[...]

Ser vice Manual 29 Flaring Work and Connection of Piping Outdoor Align the center of the pipings and sufficiently tighten the flare nut by hand. 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 arrow on the wrench. Liquid [...]

30 Multi type Air Conditioner Connecting the Cable betw een Indoor Unit and Outdoor Unit Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. are the same as those of the i[...]

Ser vice Manual 31 Connect the cable to the Outdoor unit. 1. Remove the cover control from the unit by loosening the screw. Connect the wires to the terminals on the control board individually as the following. 2. Secure the cable onto the control board with the holder (clamper). 3. Refix the cover control to the original position with the screw. :[...]

32 Multi type Air Conditioner (1) Remove two-caps on the conduit panel. (2) Make a hole appropriate for the passage of connection cable through on cap by tool. (for low voltage line) (3) Pass the connecting cable through the hole. (4) Properly connect the cable on the terminal block. (5) Fix the connection cable with cord clamp provided on the unit[...]

Ser vice Manual 33 Connect the cable to the indoor unit CA UTION: Pr ovide a cir cuit breaker between power sour ce and the unit as shown below . Air Conditioner Circuit Breaker Use a circuit breaker or time delay fuse . Main power source Model 24k 1 Ø , 230/208V 25A P ower source Fuse or break er Capacity 1. Connect the wires to the terminals on [...]

34 Multi type Air Conditioner Checking the D rainage, F or ming the Pipings and Long Pipe Setting Chec king the drainage T o chec k the drainage. 1. Pour a glass of water on the evaporator. 2. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit. Drain piping 1. The drain hose should point[...]

Ser vice Manual 35 Checking the D rainage, F or ming the Pipings and Long Pipe Setting Forming the piping Form the piping by wrapping the con- necting portion of the indoor unit with insulation material and secure it with two kinds of vin yl tape. • If you want to connect an additional drain hose, the end of the drain outlet should be routed abov[...]

36 Multi type Air Conditioner Air Purging and Ev acuation Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5. Water may l[...]

Ser vice Manual 37 Checking the D rainage, F or ming the Pipings and Long Pipe Setting 1. Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with tubi[...]

38 Multi type Air Conditioner Charging ■ Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set for each indoor line. Any time total line set is used either shorter or longer then the nominal 22.5m(75ft: for tri-zone) line set length the refrigerant charge has to be adjusted. ■ Whether the li[...]

Ser vice Manual 39 1. Check that all tubing and wiring have been properly con- nected. 2. Check that the gas and liquid side service valves are fully open. 1) Prepare remote controller Remove the battery cover by pulling it according to the arrow direction. Insert new batteries making sure that the (+) and ( – ) of battery are installed correctly[...]

40 Multi type Air Conditioner Operation 1. MAIN UNIT FUNCTION • DISPLA Y Op eration Indicato r • 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) Sl eep Time r Indica tor • On while in sleep timer mode, off when sleep timer cancel or appliance ope[...]

Ser vice Manual 41 Operation 27 ° C(80.6 ° F) , it operates with Super-Low(while in sleep mode, with the medium airflow speed). • While compressor off, the indoor fan is off when the indoor pipe temp is below 33 ° C(91.4 ° F) , when above 35 ° C(95 ° F) , it operates with the low airflow speed. • While in defrost control, the indoor is ou[...]

42 Multi type Air Conditioner Operation 2) Fuzzy Operation for Dehumidification • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5 ° C(32.9 ° F) or more below the setting temp, the compressor is turned off. When 0.5 ° C(32.9 ° F) or more above the setting temp, the compressor is turned on. Compresso[...]

Ser vice Manual 43 Operation • If the appliance is on pause at the time set by the timer, the pause continues. ■ Off-Timer <=> 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[...]

44 Multi type Air Conditioner Operation ■ Forced Operation • To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions. • When the power is supplied while the slide switch is on the forced operation p[...]

Ser vice Manual 45 "Wall Mounted Type is standard" * Functions is dependent on model type. Operation Function of Indoor Unit On/Off : Lights up during the system operation. Sleep Mode : Lights up during Sleep Mode Auto operation. Timer : Lights up during Timer operation. Defrost Mode Outdoor unit operation : Lights up during Defrost Mode [...]

46 Multi type Air Conditioner Operation • Room temperature sensor. (THERMISTOR) • Maintains the room temperature in accordance with the Setting Temp. • Indoor fan is delayed for 5 sec at the starting. • Restarting is inhibited for approx. 3 minutes. • High, Med, Low, CHAOS, JET COOL • Intermittent operation of fan at low speed. • The [...]

Ser vice Manual 47 Operation Function of Outdoor Unit Outdoor Unit Two Comp algorithm Operating Step LEV Control Out door Fan Control • Compressor step varies considering condition such as room temp,outdoor temp, operating room number,Temp gap between room temp and set temp and so on. • LEV pulse is modulated to keep constant superheat or subco[...]

48 Multi type Air Conditioner Operation Remote Contr ol Operation ON OFF CANCEL AUT O CLEAN ° C/ ° F SET Cooling Operation Auto Operation Healthy Dehumidification Operation Flip-up door (opened) Heating Operation Signal transmitter • Cooling Model( ), Heat Pump Model( ) 5 1 3 10 9 16 17 12 18 15 6 4 2 7 11 8 13 14 Operation Mode The Remote Cont[...]

Ser vice Manual 49 Disassembly Disassembl y Indoor Unit Split T ype Indoor Unit 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 securin[...]

50 Multi type Air Conditioner Disassembly 2. T o remove the Contr ol Bo x. • Remove securing screws. • Pull the control box out from the chassis carefully. 3. T o remove the Disc harge Grille . • Unhook the discharge grille and pull the discharge grille out from the chassis carefully. 4. T o remove the Ev aporator . • Remove 3 screws securi[...]

Ser vice Manual 51 Disassembly • Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot. 5. T o remove the Motor Cover • Remove 2 securing screw. • Pull the motor cover out from the chassis carefully. 6. T o remove the Cross-Flo w Fan • Loosen the screw [...]

52 Multi type Air Conditioner Disassembly Art Cool T ype Indoor Unit CA UTION: Disconnect the unit fr om power suppl y before making an y chec ks. Be sure the power s witch is set to “OFF”. 1. To remove the Grille from the Chassis. - Pull the grille bottom, the remove 2 securing screws. - Lift the both lower parts of panel front. - After pull d[...]

Ser vice Manual 53 Disassembly 3) To remove the Evaporator. - Remove 4 screws securing the evaporator. - Pull the evaporator out from the chassis carefully. 4) Before removing the Turbo Fan. - Remove the securing screws from the chassis. - Pull the pipe cover, top cover and the air guide. 5) To remove the Motor. - Remove the securing bolt from the [...]

54 Multi type Air Conditioner Schematic Diagram Schematic Dia gram Electr onic Control De vice 1. Indoor Unit 1) Split T ype[...]

Ser vice Manual 55 Schematic Diagram 2) Art Cool T ype OUTDOOR 64 17 Digit2 10 LED2 LED4 LED3 LED1 DEFROST ON/OFF TIMER SLEEP 6(d) Digit1 c 5 d e 8(c) 7(e) b g f a 9(b) 1(g) 3(a) 4(f) 4 12 16 15 14 13 8 10 11 9 6 7 5 2 3 1 45 27 22 20 19 18 21 25 24 23 26 37 32 30 29 28 31. 33 34 35 36 41 39 38 40 43 42 44 54 59 61 62 63 60 56 57 58 55 49 52 51 53 [...]

56 Multi type Air Conditioner Schematic Diagram 2. Outdoor Unit P07 SW01F OR2H,OR7H,OR10H:91K,OR3H-4H,OR8H-9H,OR11H-12H:15K(ETC:20K) R03T 1 1 DC 5V 56K R04T 1K 1 2 7036P IC01A CN-JIG 3 4 3 4 2 2 JIG_RX JIG_TX DC 5V 10K R01T 1K R02T C01H-C04H : 103 P21 21 JIG_RX 26 OSC01B CST-8.00MGW JIG_TX + 3 C02A 10 R03A,100 50V 25V 0.01 C01A R02A,4.7K R01A,1K Xi[...]

Ser vice Manual 57 Schematic Diagram 23.2K 8.06K 8.06K 23.2K 23.2K 8.06K 1% 1% 51.1K 102 100V C25M 1% 9.1k R27M 100uf C24M + 2 5 4 6 100uF 25V C26M R28M 13K 1% 1 5 + R29M,2K,1% 4 22 51.1K 10K 1 2.94K 6 7 4.7K PWM(C) 35.7K 4.3K R26M 10.2K 3 2 1 21.5K 6.04K KRA101M Q07M DC 5V 7 3K 5.23K 39.2K 13K 20 20 9 8 R04S 20K 14 51.1K 102 C14M 100V R15M C13M + [...]

58 Multi type Air Conditioner 1. Room T ype Indoor Unit -S4/SE chassis 2. Ar t Cool T ype Indoor Unit Wiring Diagram Schematic Diagram 3. Outdoor Unit 1. A2UH243F A0(LMU240HE) 2. A2UC243F A0(LMU240CE)[...]

Ser vice Manual 59 Schematic Diagram 1. Indoor Unit MAIN P .C.B ASM 1) Split T ype Components Locations • T OP VIEW •B O T T O MV I E W PCB :6870A90409B ASSY :6871A20771 6871A20782[...]

60 Multi type Air Conditioner Schematic Diagram 2) Art Cool T ype • TOP VIEW • BOTTOM VIEW[...]

Ser vice Manual 61 Schematic Diagram 2. Display ASSEMBL Y 1) Split T ype (6871A20680) 2) Art Cool T ype (6871A20462) BOTTOM VIEW TOP VIEW[...]

62 Multi type Air Conditioner Schematic Diagram 3. Outdoor Unit 1) Component side[...]

Ser vice Manual 63 Schematic Diagram 2) Solder side[...]

64 Multi type Air Conditioner S/W Cons. Comp (GK094K) C/V1 C/V2 Th1 Th2 Acc. A-Room B-Room LEV-A LEV-B Air Sensor Eva. Sensor Eva. Sensor 9.52 6.35 LEV 15RC R/Valve 5220AR3228E Air Sensor strainer strainer Sensor Cons. Comp (GK141K) Ø Ø 1. A2UH243F A0(LMU240HE) 2. A2UC243F A0 (LMU240CE) T roub leshooting Guide T r oub leshooting Guide Refrigerati[...]

Ser vice Manual 65 T roub leshooting Guide ■ 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, primaril[...]

66 Multi type Air Conditioner T roub leshooting Guide T rouble anal ysis 1. Check temperature difference between intake and discharge air, and operating current. All amount of refrigerant leaked out. Check refrigeration cycle. Refrigerant leakage Clog of refrigeration cycle Defective compressor Excessive amount of refrigerant Normal Notice: Tempera[...]

Ser vice Manual 67 T roub leshooting Guide Electr onic P ar ts T roub leshooting Guide ❇ Refer to electronic contorol device drawing & schematic diagram. The Pr oduct doesn’t operate at all. Turn off the main power and wait until LED on outdoor PCB is off. Turn on the main power again. Does "Beeping" sound is made from the indoor [...]

68 Multi type Air Conditioner T roub leshooting Guide Turn on main power. While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. 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 o[...]

Ser vice Manual 69 T roub leshooting Guide Turn on the main power. When in air circulation mode, compressor/outdoor fan is stopped. Turn off main power. Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor. Check the sensor for Indoor temperature is attatched as close as to be e[...]

70 Multi type Air Conditioner T roub leshooting Guide When indoor F an does not operate . Check connecting condition of the CN-MOTOR CON- NECTOR Does the voltage of terminal of CN-DC/DC CONNECTOR in Indoor unit corresponds to the values in the table o f page 56 Do the voltage of terminal of CN-DC/DC CONNECTOR in Outdoor unit corresponds to the valu[...]

Ser vice Manual 71 T roub leshooting Guide When the louver does not operate . T rouble 5 When V er tical Louver does not operate . • Confirm that the Vertical 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 C[...]

72 Multi type Air Conditioner T roub leshooting Guide Err or Code ■ Trouble Shooting Error Title Cause of error Check point & Normal condition code 01 Indoor air sensor 02 Indoor inlet pipe sensor 06 Indoor outlet pipe sensor • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circ[...]

Ser vice Manual 73 T roub leshooting Guide Error Title Cause of error Check point & Normal condition code 05 / 53 Communication (Indoor ➔ Outdoor) • Communication poorly • Power input AC 230V.(Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. • The GND 1,2 is not connected at[...]

74 Multi type Air Conditioner T roub leshooting Guide Error Title Cause of error Check point & Normal condition code 33 D-Pipe Temp. High • Discharge sensor temp. high • Check the discharge pipe sensor. • Check the install condition for over load. • Check the leakage of refrigerent. • Check the SVC V/V open. Error Title Cause of error[...]

Ser vice Manual 75 T roub leshooting Guide Error Title Cause of error Check point & Normal condition code 44 Outdoor air sensor 45 Condensor pipe sensor 47 D-Pipe sensor • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Interna[...]

76 Multi type Air Conditioner 2-wa y , 3-wa y V alv e 2-wa y , 3-wa y V alve 2-way Valve (Liguid Side) 3-way Valve (Gas Side) Works Shaft position Shaft position Service port Shipping Closed Closed Closed (with valve cap) (with valve cap) (with cap) Air purging Open Closed Open (Installation) (counter-clockwise) (clockwise) (push-pin or with vacuum[...]

Ser vice Manual 77 2-wa y , 3-wa y V alv e (1) Pumping down • 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 mi[...]

78 Multi type Air Conditioner 2-wa y , 3-wa y V alv e (2) Ev acuation (All amount of refrigerant leaked) • Procedure 1. Confirm that both the liguid side valve and gas 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 the low side of[...]

Ser vice Manual 79 2-wa y , 3-wa y V alv e (3) Gas Charging (After Evacuation) • 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 bottom of the cylinder. - If you are using a gas cylinder, also use a scale and reverse the cylinder so that the syste[...]

80 Multi type Air Conditioner 135301 152302-2 152313 152302-1 342800 263230-2 263230-1 359011 131410 733010 135311 135312 159901 268712 146811 147582 346810 135516 35211B 354210 249951 352150 268714 668713 267110 135500 Exploded View & Replacement P ar ts List Exploded Vie w & Replacement P ar ts List Indoor Unit S4, SE chassis[...]

Ser vice Manual 81 Exploded View & Replacement P ar ts List P ar ts List (S4, SE chassis) PART No. S4 chassis SE chassis AMNH093D4A0 (LMN090HE) AMNC093D4A0 (LMN090CE) AMNH123DEA0 (LMN120HE) AMNC123DEA0 (LMN120CE) 131410 CHASSIS ASSEMBLY 3141A20019C 3141A20019C 3141A20034A 3141A20034A R 135311 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A14003K 3531A14003[...]

82 Multi type Air Conditioner Exploded View & Replacement P ar ts List 135515 267110 135500-3 268714 352150 35211B 263230-2 147581 359012 349600 352380 146811 146811 147581 346810 147581 268712 135500-1 131410 354210 263230-1 135500-2 146811 268717-1 268717-2 330870 135312 146811 135314 159830 249951 SP3 Chassis Art Cool T ype[...]

Ser vice Manual 83 Exploded View & Replacement P ar ts List P ar ts List (SP3 chassis) PART No. AMNH093APM0 (LMAN090HNS) AMNC093APM0 (LMAN090CNS) AMNH123APM0 (LMAN120HNS) AMNC123APM0 (LMAN120CNS) 131410 CHASSIS ASSEMBLY 3141A20030C 3141A20030C 3141A20030C 3141A20030C R 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A21035N 3531A21035T 3531A21035N 353[...]

84 Multi type Air Conditioner Exploded View & Replacement P ar ts List 548490 552202 561410 649950 668711 435511 552203-1 552203-2 552203-1 552203-2 554160-1 554160-2 552113-2 552204-1 552204-2 263230-1 263230-2 W0CCZ-1 W0CCZ-2 554031 435512 559010 435301 546810 447910 437210 430411 552201 137213-2 137213-1 435300 566000 561411-1 561411-2 A2UH2[...]

Ser vice Manual 85 Exploded View & Replacement P ar ts List P ar ts List (A2UH243F A0(LMU240HE), A2UC243F A0 (LMU240CE)) 437210 PANEL ASSEMBLY,FRONT(SUB) 1A00197C 1A00197C R 137213-1 PANEL ASSEMBLY,SIDE 1A00202F 1A00202F R 137213-2 PANEL ASSEMBLY,SIDE 3A02284R 3A02284R R 435300 GRILLE,REAR 1A00208H 1A00208H R 435301 GRILLE,DISCHARGE 3530A20007J[...]

P/No.: 3828A20462Z April, 2006 Printed in Korea[...]