Instruction/ maintenance manual of the product LAN181CNW, LAU181CNW, LA180CPI, LA180CPO LG Electronics
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LG Room Air Conditioner SERVICE MANUAL LG MODELS: LAN181CNW(ASNC183VML3) LAU181CNW(ASUC183VML3) LA180CPI (ASNC183VML3) LA180CPO (ASUC183VML3) CAUTION website http://www.lgservice.com • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
2 Room Air Conditioner Details of 2006 LG Model Name .................................................................................................... 3 Safety Precautions ............................................................................
Ser vice Manual 3 Details of 2006 LG Model Name 12 Code T ype Code of Model Meaning 1 Producing Center/ A~Z L: ChangW on R22, A: ChangWon R410A, C: ChangW on R407C Refrigerant 2 T ype of Air condition.
4 Room Air Conditioner Saf ety Precautions Safety Precautions T o pre v ent injury to the user or other people and proper ty damage, the f ollo wing instructions must be f ollow ed. ■ Incorrect operation due to ignoring instruction will cause har m or damage .
Ser vice Manual 5 Saf ety Precautions ■ Operation Be cautious when unpacking and installing the product. • Shape edges could cause injur y . Be especially careful of the shar p edges. For installation, alwa ys contact the dealer or an A uthorized Ser- vice Center .
6 Room Air Conditioner Saf ety Precautions Do not place a heater or other appliances near the power cable. • There is risk of fire, f ailure of the product, and/or electric shock. Do not let the air conditioner run for a long time when the humidi- ty is very high and a door or a window is left open.
Ser vice Manual 7 Saf ety Precautions V entilate the product fr om time to time when operating it togeth- er with a stove, etc. • There is risk of fire or electr ical shock. Unplug the appliance before performing c leaning or mainte- nance. • There is risk of electr ic shock.
8 Room Air Conditioner Saf ety Precautions ■ Operation Use two or more people to lift and transport the air conditioner • A void personal injury . Do not install the product where it will be exposed to sea wind (salt spray) directl y . • It ma y cause corrosion in the product.
Ser vice Manual 9 Saf ety Precautions Do not drink the water drained from the unit. • It is not sanitar y and could cause serious health issues. Use a firm stool or ladder when cleaning or maintaining the air conditioner . • Be careful and av oid personal injur y .
10 Room Air Conditioner Functions • Room temperature sensor . (THERMIST OR) • Maintains the room temperature in accordance with the Setting T emp . • Indoor f an is delay ed for 5 sec at the star ting. • Restar ting is inhibited for appro x. 3 minutes.
Ser vice Manual 11 Functions Healthy Dehumidification Operation Mode. ( ) Remote Control Operation ON/OFF Reset Operation Mode Selection Temperature Setting Timer Selection Timer Setting JET COOL Timer Cancel Sleep Operation Airflow Direction Control (Cooling model only) (Heating model only) TEMPERATURE LOW HIGH Cooling Operation Mode.
12 Room Air Conditioner Product Ref erences NO TE: Please refer to Label Quality on the product since this specification ma y be changed for impro ving perf or mance Items Unit LA*181CNW(AS-C183VML3)/LA180CP* (AS-C183VML3) P ower Supply ø , V , Hz 1, 208/230, 60 Cooling Capacity BTU/h 17 800/18 000 Input W 2,000/2,000 Running Current A 9.
Ser vice Manual 13 Dimensions 522 928 147 Pipe Hole Fix Hole MODEL DIM Unit W mm(inch) 928(36.5) H mm(inch) 522(20.6) D mm(inch) 147(5.8) Indoor Unit Dimensions Indoor Unit.
14 Room Air Conditioner Dimensions W L6 L5 L7 L8 D L1 L2 L9 L10 L3 L4 H Gas side 3-way valve Liquid side 2-way valve MODEL OUTDOOR UNIT DIM W mm(inch) 870(34.3) H mm(inch) 655(25.8) D mm(inch) 320(12.6) L1 mm(inch) 370(14.6) L2 mm(inch) 25(1.0) L3 mm(inch) 630(24.
Ser vice Manual 15 Refrigeration Cycle Diagram F or installation ov er rated, *a proper quantity of refr igerant should be added f or each meter . Ex) 18K: When installed at a distance of 30m, 450g of refrigerant should be added.
16 Room Air Conditioner Wiring Diagram 18K (Cooling Only Models) Wiring Diagram Indoor Unit Outdoor Unit.
Ser vice Manual 17 Operation Details • DISPLA Y 1) C/O Model Operation Indicator • ON while in appliance operation, OFF while in appliance pause . • Flashing while in disconnection or shor t in Ther mistor .
18 Room Air Conditioner Operation Details • While in compressor off , the indoor f an repeats low airflo w speed and pause. • While the intak e air temp is between compressor on temp. and compressor off temp ., 10-min dehumidifica- tion operation and 4-min compressor off repeat.
Ser vice Manual 19 Operation Details ■ Fuzzy Operation (C/O Model) • According to the temperature set b y Fuzzy rule, when the intake air temp is 0.5 ° C or more belo w the setting temp , the compressor is tur ned off . When 0.5 ° C or more abov e the setting temp, the compressor is turned on.
20 Room Air Conditioner Operation Details 2) Fuzzy Operation for Dehumidification • According to the setting temperature selected by Fuzzy rule, when the intak e air temp is 0.5 ° C or more below the setting temp , the compressor is turned off. When 0.
Ser vice Manual 21 Operation Details ■ Off-Timer Operation • When the set time is reached after the time is input by the remote control, the appliance stops oper ating. • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
22 Room Air Conditioner Operation Details ■ Jet Cool Mode Operation (H/P Model) • While in heating mode or Fuzzy operation, the Jet Cool k ey cannot be input. When it is input while in the other mode operation (cooling, dehumidification, v entilation), the Jet Cool mode is operated.
Ser vice Manual 23 Displa y Function 3sec 3sec 3sec (once) Error Code 1 Error Displa y LED (Indoor body operation LED) Error contents • Indoor room temperature thermistor open/shor t • Indoor pipe temperature thermistor open/shor t. • Indoor Thermistor assembly chec k SVC check point 1.
24 Room Air Conditioner Intr oduction This symbol alerts you to the risk of electric shoc k. This symbol alerts you to hazar ds that may cause harm to the air conditioner .
Ser vice Manual 25 Installation Installation Type "A" screw and plastic anchor Type "B" screw Remote control holder Installation plate Figure Figure Name Screw driver Electric dril.
26 Room Air Conditioner Installation Installation Map Installation parts you should purchase. NOTICE (Left and right are identical) More than 12"(30cm) More than 28"(70cm) More than 24".
Ser vice Manual 27 Installation 1. Check the quality label on the indoor and outdoor unit. 2. Make certain that the refr igerant is R-410A. THIS PRODUCT CONT AINS R-410A REFRIGERANT 1) Diff erent compressor oil - R-410A(P olyol ester) / R-22(Mineral).
28 Room Air Conditioner Installation Read completely , then follo w step by step . 1) Select the best location 1. Indoor unit ■ Do not hav e any heat or steam near the unit. ■ Select a place where there are no obstacles in front of the unit. ■ Make sure that condensation dr ainage can be con- veniently routed a wa y .
Ser vice Manual 29 Installation 1. Open panel front ■ First,Pull the grille bottom, then remov e screws(2 pieces), and close grille bottom again. ■ The moment of lifting the both low er par ts of .
30 Room Air Conditioner Installation 4) How to fix installation plate The wall y ou select should be strong and solid enough to pre vent vibr ation Mount the installation plate on the wall with type "A" screws . If mounting the unit on a concrete wall, use anchor bolts .
Ser vice Manual 31 Installation 1) Flaring work Main cause f or refrigerant leakage is due to defect in the flaring work. Carr y out correct flar ing work using the f ollowing procedure. 1. Cut the pipes and the cable. • Use the piping kit accessor y or pipes purchased locally .
32 Room Air Conditioner Installation 2. T ape the tubing, drain hose, and the connecting cable. Be sure that the drain hose is located at the lowest side of the b undle.
Ser vice Manual 33 Installation 3) Connection of the pipes-Outdoor 1 . Align the center of the pipings and sufficientl y tighten the flare nut b y hand.
34 Room Air Conditioner Installation 1 Indoor Unit Outdoor Unit 2 3 4 1 2 3 4 5 6 G To branch circuit Ground P ower supply a L1 * L2 Connecting cable(Low v oltage) b T er minal (4P) T er minal (6P) Ou.
Ser vice Manual 35 Installation G T er minal bloc k Cap (Remov e) Clamp cord Lock nut Conduit panel Loop Round terminal Screw with special washer Screw with special washer Round terminal T er minal pl.
36 Room Air Conditioner Installation After the confir mation of the abov e conditions, prepare the wiring as follo ws: 1) Never fail to ha ve an individual po wer cir cuit specifically for the air conditioner . As for the method of wiring, be guided by the cir cuit diagram posted on the inside of control co ver .
Ser vice Manual 37 Installation 2) Form the piping 1. Form the piping by wrapping the connecting por- tion of the indoor unit with insulation material and secure it with two kinds of vin yl tapes. ■ If you w ant to connect an additional drain hose , the end of the drain outlet should be routed abov e the ground.
38 Room Air Conditioner Installation CAUTION CAUTION Air Conditioner Circuit Breaker Use a circuit breaker or time dela y fuse. Main pow er source If a pow er plug is not to be used, provide a circuit break er between pow er source and the unit as shown belo w .
Ser vice Manual 39 Installation T o av oid nitrogen enter ing the refrigerant system in a liquid state, the top of the cylinder m ust be higher than its bottom when you pressurize the system. Usually , the cylinder is used in a v er tical standing position.
40 Room Air Conditioner Installation 3. Evacuation • Connect the charge hose end described in the pre- ceding steps to the vacuum pump to e vacuate the tub- ing and indoor unit. Confirm the "Lo" knob of the manifold v alve is open. Then, run the vacuum pump .
Ser vice Manual 41 Installation 1. First, Check the side co ver assembly exactl y , Fix power cor d in the bottom groo ve 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.
42 Room Air Conditioner Installation 1. Chec k that all tubing and wiring have been properly connected. 2. Chec k that the gas and liquid side ser vice valv es are fully open. 1. Prepare remote contr ol 1. Remov e the batter y cover by pulling it according to the arrow direction.
Ser vice Manual 43 Operation Operation Remote Contr ol Operations The controls will look like the f ollowing. 1. ST ART/ST OP BUTT ON Operation star ts when this button is pressed and stops when the button is pressed again. 2. OPERA TION MODE SELECTION BUTT ON Used to select the operation mode .
44 Room Air Conditioner Disassembly of the parts (Indoor unit) W arning : Disconnect the unit from power supply bef ore making any chec ks. Be sure the power s witch is set to “ OFF ” . 1. T o remove the Grille fr om the Chassis. - Push mark[ ] on the grille bottom then pull it down and remov e 3 secur ing screws .
Ser vice Manual 45 Disassembly of the parts (Indoor unit) 3. T o remove the Ev aporator . - Remo ve 1 scre ws securing the ev aporator . - Pull the e vapor ator out from the chassis carefully . 4. Before remo ving the T urbo Fan. - Remo ve the securing screws from the chassis .
46 Room Air Conditioner 2-wa y , 3-wa y V alv e 2-way V alve (Liquid Side) 3-way V alve (Gas Side) Shaft position Shaft position Service por t Closed Closed Closed (with valv e cap) (with valv e cap) .
Ser vice Manual 47 2-wa y , 3-wa y V alv e 1. Air purging Required tools : h e xagonal wrench, adjustable wrench, torque wrenches, wrench to hold the joints, and gas leak detec- tor . The additional gas f or air purging has been charged in the outdoor unit.
48 Room Air Conditioner 2-wa y , 3-wa y V alv e 2. Pumping down • Procedure (1) Confirm that both the 2-way and 3-wa y valves are set to the open position. – Remo ve the v alve stem caps and confirm that the valv e stems are in the raised position.
Ser vice Manual 49 2-wa y , 3-wa y V alv e 1) Re-air purging (Re-installation) • Procedure (1) Confirm that both the 2-way v alve and the 3- way v alve are set to the closed position. (2) Connect the charge set and a gas cylinder to the service por t of the 3-way v alve .
50 Room Air Conditioner 2-wa y , 3-wa y V alv e 2) Balance refrigerant of the 2-way , 3-way v alves (Gas leakage) • Procedure (1) Confirm that both the 2-way and 3-wa y valves are set to the back seat. (2) Connect the charge set to the 3-wa y valve ’ s port.
Ser vice Manual 51 2-wa y , 3-wa y V alv e 3. Ev acuation (All amount of refrigerant leaked) • Procedure (1) Connect the vacuum pump to the char g e set ’ s center hose (2) Evacuation f or appro ximately one hour . – Confir m that the gauge needle has mov ed tow ard -76 cmHg (vacuum of 4 mmHg or less).
52 Room Air Conditioner 2-wa y , 3-wa y V alv e 4. Gas Charging (After Evacuation) • Procedure ( 1 ) Connect the charge hose to the char ging cylinder . – Connect the charge hose which you dis-con- nected from the vacuum pump to the v alve at the bottom of the cylinder .
Ser vice Manual 53 2-wa y , 3-wa y V alv e Additional gas c harging (Gas leakage) • When refrigerant is insufficient b y leakage, recharge the unit with the refrigerant up to normal oper- ating suction pressure. • Use the gr aph or the equation below to get operating suction pressure according to indoor and out- door temperature .
54 Room Air Conditioner Cycle T roubleshooting Guide 1. T rouble anal ysis 1. Check temper ature difference betw een intake and discharge air and oper ating current. T emp . Diff erence Operating Current T emp . diff erence :appro x. 0 ° F Current : less than 80% of rated current T emp .
Ser vice Manual 55 Cycle T roubleshooting Guide 2. Pr oduct does not operate at all. (* Refer to Electr onic Control De vice drawing and Schematic diagram.) T urn off Main Po wer T urn on Main P ower Does "beeping" sound is made from the Indoor Unit? Primar ily , the operating condition of Micom is OK.
56 Room Air Conditioner Cycle T roubleshooting Guide 3. The pr oduct is not operate with the remote controller . T urn on Main Po wer While the compressor has been stopped, the compressor does not operate owing to the dela ying function for 3 min utes after stopped.
Ser vice Manual 57 Cycle T roubleshooting Guide 4. Compressor/Outdoor F an are unable to drive. T urn on Main P ower Operate "Cooling Mode( )" b y setting the desired temperature of the remote controller is less than one of the indoor temperature b y 2 ° F at least.
58 Room Air Conditioner Cycle T roubleshooting Guide 5. When Indoor F an does not operate . Check connecting condition of the CN-MO T OR CON- NECT OR Does the v oltage of terminal of CN-DC/DC CONNECT .
Ser vice Manual 59 Cycle T roubleshooting Guide • Confir m that the V er tical Louver is normally geared with the shaft of Step- ping Motor . • If the regular torque is detected when rotating the .
60 Room Air Conditioner Cycle T roubleshooting Guide • The operation indicator of Indoor unit b links five times . • The red indicator of Outdoor unit blinks fiv e times. Check the connecting wires betw een Indoor and Outdoor unit for the connecting error and the contacting condition.
Ser vice Manual 61 Cycle T roubleshooting Guide 8. The phenomena in case of connecting error INDOOR UNIT Connector T ype Condition Open and connecting error Open Open Open Open Shor t between terminals ( and ) of ROOM-TH. Shor t between terminals ( and ) of PIPE-TH.
62 Room Air Conditioner Cycle T roubleshooting Guide OUTDOOR UNIT Connector T ype Condition OPEN • PWB pattern is damaged when applying the power . Connecting re versely Connecting re versely OPEN O.
Ser vice Manual 63 Cycle T roubleshooting Guide 9. V oltage of Connectors accor ding to Indoor Fan Speed 4 3 2 1 1 1 2 3 4 INDOOR FAN MOTOR INDOOR PWB ASSY Connecting wires between Indoor and Outdoor .
64 Room Air Conditioner Electronic Control De vice • PWB ASSY SVC P AR T LIST 1 18K Cooling Model 6871A20387J 12K 20K 27K 12K OPEN OPEN NO MODEL P/No.
Electronic Control De vice • T OP VIEW • BO TT OM VIEW MAIN PWB ASSY(Outdoor Unit).
66 Room Air Conditioner Electronic Control De vice • T OP VIEW • BO TT OM VIEW DISPLA Y PWB ASSEMBL Y.
Ser vice Manual 67 Schematic Diagram OUTDOOR 48 46 47 44 42 43 40 38 39 41 36 35 34 33 37 45 15 1 2 2 1 23 18 16 17 19 20 21 22 28 24 25 26 27 29 30 31.
68 Room Air Conditioner Schematic Diagram Outdoor Unit.
Ser vice Manual 69 Exploded Vie w and Replacement P ar ts List 249951 26871 1-2 14758 1 135311- 2 146811 135500- 2 146811 352380-2 352380-1 131410 14758 1 135311- 1 567480 135500- 1 135311-3 147581 35.
70 Room Air Conditioner Exploded View and Replacement P ar ts List P arts List(indoor) 131410 CHASSIS ASSEMBL Y 3141A20008J R 135311-1 GRILLE ASSEMBL Y ,DISCHARGE(INDOOR) 3531A20124K R 135311-2 GRILLE.
Ser vice Manual 71 Exploded View and Replacement P ar ts List 2. Outdoor unit(18K) 435512 437210 559010 546810 55211G 554031 437212 435511 447910 552202 561410 567502-1 552116 566000 430410 649950 263.
72 Room Air Conditioner Exploded View and Replacement P ar ts List P arts List(outdoor) LOCA TION DESCRIPTION PA R T N o . REMARKS No. 552203-1 V AL VE,SER VICE 2H02479B R 552203-2 V AL VE,SER VICE 52.
P/No.: 3828A20065Y Printed in Korea.
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