LG ARTCOOL LA180CP Service Manual Download

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62 Room Air Conditioner

Cycle Troubleshooting Guide

OUTDOOR UNIT

Connector Type

Condition

OPEN

• PWB pattern is damaged when applying the power.

Connecting reversely

OPEN

Connecting error

(

)

Connecting error

(

)

Connecting error

(

)

Connecting error

(

)

Connecting error

(

)

Connecting error

(

)

• All functions stop.
• The operation with the remote controller, forced and

test one do not operate.

• All functions stop.
• The operation with the remote controller, forced and

test one do not operate.

• The Indoor Fan does not operate.

• The signal of remote controller is inputted, but the

product does not operate.

• The RED indicator of outdoor unit and the operation

indicator of indoor one blinks 5 times after 2 minutes
with applying the power.

• No power for Indoor unit.
• The signal input of the remote controller and opera-

tion of product is impossible.

• The thermal protector of the Power Trans operates

when let it alone for long time.

• The signal of the remote controller is inputted.
• The fuse and Q61 in the Outdoor unit are damaged

when the indoor fan is operated.

• No power for Indoor unit.
• The signal input of the remote controller and opera-

tion of product is impossible.

• The RED indicator of the Outdoor unit blinks 5 times

after 2 minutes with applying the power.

• All functions stop.
• The operation with the remote controller, forced and test

one do not operate.

• The only signal of remote controller operation/stop is

inputted, but the product does not operate.

• The RED indicator of outdoor unit blinks 5 times after 2

minutes with applying the power.

• The beep sound, such as "beep, beep, beep, beep,

beep", occurs periodically in Indoor unit.

• The signal input of a remote controller and operation of

product is impossible.

• The RED indicator blinks 5 times after 2 minutes with

applying the power.

• All functions stop or the compressor does not operate.
• The operation with the remote controller, forced and test

one do not operate.

• All functions stop.
• The operation with the remote controller, forced and test

one do not operate.

CN-POWER

RY-COMP

terminal

CN-TRANS

CN-FAN

The connecting

wire of CN-

DC/DC, and

Indoor and Out-

door Unit

Blue
Black
Brown
Red

Phenomena

Summary of Contents for ARTCOOL LA180CP

Page 1: ...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 ONLY FOR AUTHORIZED SERVICE PERSONNEL ...

Page 2: ...ng Diagram 16 Operation Details 17 Display Function 23 Self diagnosis Function 23 Introduction 24 Installation 25 Operation 42 Disassembly of the parts Indoor Unit 43 2 way 3 way Valve 46 Cycle Troubleshooting Guide 54 Electronic Control Device 64 Schematic Diagram 67 Exploded View and Replacement Parts List 69 Air Conditioner Service Manual TABLE OF CONTENTS ...

Page 3: ... 1 9 Electric Standard 1 115V 60Hz 6 220 240V 50Hz 2 220V 60Hz 7 110V 50 60Hz 3 208 230V 60Hz 8 380 415V 50Hz 5 200 220V 50Hz 9 380 415V 60Hz 7 Chassis A Z Name of tool of unit 8 Color A Z R Mirror B Blue N Walut W White M Metal C Cherry 9 Function A Z 10 Serial No 0 9 Basic A Basic 4Way B Plasma Filter C Plasma Filter 4Way D Tele LED 4Way E Tele LCD Plasma F 4Way F Tele Multi LCD Plasma F 4Way G ...

Page 4: ... only Be sure not to do Be sure to follow the instruction Installation Do not use damaged power cords plugs or a loose socket There is risk of fire or electric shock For electrical work contact the dealer seller a qualified electri cian or an Authorized Service Center There is risk of fire or electric shock Always use the power plug and socket with the ground terminal There is risk of electric sho...

Page 5: ...he base collapses the air con ditioner could fall with it causing property damage product failure and personal injury Install the indoor unit on the wall where the height from the floors more then 8ft 2 4m There are sharp moving parts that could cause personal injury Do not handle the pipe by your self customer High Pressure refrigent may cause personal injury Use a dedicated outlet for this appli...

Page 6: ...for the fresh air When flammable gas leaks turn off the gas and open a window for venti lation before turning the product on Do not use the telephone or turn switches on or off There is risk of explosion or fire Unplug the unit if strange sounds odors or smoke comes from it There is risk of fireproduct failure and or electric shock Stop operation and close any window in storm or hurricane before t...

Page 7: ... could result in personal injury and product damage Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in There are sharp and moving parts that could cause personal injury Always check for gas refriger ant leakage after installation or repair of product Low refrigerant levels may cause product failure Install the drain hose to ensure that wate...

Page 8: ...t is a consumer air conditioner not a precision refrigeration system There is risk of damage or loss of property Do not block the inlet or outlet of air flow It may cause product failure Use a soft cloth to clean Do not use harsh detergents solvents 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 removing the a...

Page 9: ...d avoid personal injury Replace all the batteries in the remote There is risk of fire or explosion Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn or explode If the liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote if the batteries have leaked The chemicals in batteries could cause burns or ...

Page 10: ...l Starting Current Control Time Delay Safety Control Indoor Fan Speed Control Operation indication Lamps LED Soft Dry Operation Mode Both the indoor and outdoor fan stops dur ing defrosting The indoor fan stops until the evaporator pipe temperature will be reached at 28 C Sleep Mode Auto Control Natural Air Control by CHAOS Logic Airflow Direction Control Defrost Deice control Heating Hot start Co...

Page 11: ...nly Heating model only TEMPERATURE LOW HIGH Cooling Operation Mode Heating Operation Mode Auto Operation Mode Air Circulation C To F Swiching Button Room Temperature Checking Setting the Time or Timer Fan Speed Selection Low Med High ON OFF CANCEL SET 2nd F C F Low 11 C High 39 C OFF ON OFF ON Cancel Sleep Mode Timer ON or Timer OFF 1 2 3 4 5 6 7 Off Timer Fan Operates without cooling or heating C...

Page 12: ...p down Auto Airflow Direction Control left right Auto Remocon Type Wireless LCD Setting Temperature Range Cooling Mode 64 86 F 18 30 C Temperature Increment 2 F 1 C Auto Operation electronic control Yes Self Diagnosis Yes Timer 24hr On Off Sleep Operation Yes Healthy Dehumidification Mode Yes Restart Delay minutes 3 Refrigerant R 410A Charge g oz 900 31 8 Power cord AWG P mm2 14 3 2 5 Fuse or brea...

Page 13: ...Service 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 ...

Page 14: ... 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 8 L4 mm inch 25 1 0 L5 mm inch 546 21 5 L6 mm inch 162 6 4 L7 mm inch 162 6 4 L8 mm inch 54 2 1 L9 mm inch 74 5 2 9 L10 mm inch 79 3 1 Outdoor Unit ...

Page 15: ...erant should be added 30 7 5 x 20g 450g INDOOR UNIT HEAT EXCHANGER EVAPORATOR HEAT EXCHANGER CONDENSER COMPRESSOR GAS SIDE CAPILLARY TUBE LIQUIDSIDE OUTDOOR UNIT MODEL 18K Cooling Only Pipe size Diameter ø Piping length Elevation Gas Liquid Rated Max Rated Max 1 2 1 4 7 5m 24 6ft 30m 98 4ft 5m 16ft 15m 49ft a proper quantity of refrigerant 18K 20g Refrigeration Cycle Diagram Cooling Only Models ...

Page 16: ...16 Room Air Conditioner Wiring Diagram 18K Cooling Only Models Wiring Diagram Indoor Unit Outdoor Unit ...

Page 17: ... mode on off OFF when timer mode is completed or canceled Defrost Indicator OFF except when hot start during 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 Setting Temp 0 5...

Page 18: ...interval whether to carry out defrost control or not and the time of defrost control are determined according to the following conditions 1 While in heating mode operation the maximum of the indoor pipe temperature is measured and it is com pared with the present indoor pipe temperature to get the difference of the indoor pipe temperatures the maximum temperature of indoor pipe the present tempera...

Page 19: ...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 Inatake Air Temp Fuzzy Operation for Cooling 21 C Inatake Air Temp 24 C Fuzzy Operation for Dehumidification Inatake Air Temp 21 C Fuzzy Operation for Heating If any of the operation modes among cooling dehumidification heating mode operations is car...

Page 20: ...temperature selected by Fuzzy rule when the intake air temp is 3 C or more above the setting temp the compressor is turned off When below the setting temp the compressor is turned on Compressor ON Temp Setting Temp Compressor OFF Temp 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 Intake...

Page 21: ...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 louvers vane automatically operate with the Chaos Swing or they are fixed to the desired direction While in Chaos Swing mo...

Page 22: ...d Press the power button let it be pressed for about 3 seconds If you want to stop the operation re press the button Auto restart In case the power comes on again after a power failure Auto Restarting Operation is the function to operate procedures automatically to the previous operating conditions Remote Control Operation Mode When the remote control is selected by the slide switch on the main un...

Page 23: ...tor open short Indoor Thermistor assembly check SVC check point 1 Heating Model 2 Cooling Model Cooling Soft Dry Fan Heating Cooling Soft Dry Fan Sleep Mode Sleep Mode Timer Mode Timer Mode Hot start Defrost Operation Indicator Timer Indicator Sleep Timer Indicator Defrost Indicator Operation Indicator Timer Indicator Sleep Timer Indicator Compressor on Indicator Display Function Self diagnosis Fu...

Page 24: ... you to hazards that may cause harm to the air conditioner This symbol indicates special notes NOTICE Symbols used in this Manual Features Signal Receptor Front Panel Air Inlet Air Discharge Power Cord Air Filter Air Intake Vents Air Outlet Vents Connecting Wires Piping Drain Hose Base Plate NEO Plasma Filter ...

Page 25: ...r 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 Horizontal meter Flaring tool set Name Installation Parts Installation Tools Read carefully and then follow step by step ...

Page 26: ...Sealer Bend the pipe as closely on the wall as possible but be careful that it doesn t break Vinyl tape Wide To carry out the drainage test remove the air filters and pour water into the heat exchanger Apply after carrying out a drainage test Saddle More than 3 9 10cm More than 19 6 50cm Gas side piping Optional Part Liquid side piping Optional Part Additional drain pipe Vinyl tape Narrow Connecti...

Page 27: ... rate of moisture 3 Composition R 410A R32 R125 50 50wt NOTE Never mix with other refrigerants 4 High pressure 1 6 times higher than R 22 High Pressure refrigerant may cause personal injury Do not handle the pipe by yourself customer High pressure refrigerant may cause personal injury manifold gauge charging and any piping tools must be dedicated to R 410A systems NOTICE Confirm The Refrigerant Ex...

Page 28: ...ght into account and select a place where noise and vibration are mini mum Select a place so that the warm air and noise from the air conditioner do not disturb neighbors Rooftop Installations If the outdoor unit is installed on a roof structure be sure to level the unit Ensure the roof structure and anchoring method are adequate for the unit loca tion Consult local codes regarding rooftop mount i...

Page 29: ...emove two screws for fixing cover pipe Pull up the cover side of desired connecting direc tion then cover side is separated In case connecting direction is left or right path through the hole of cover side When connecting pipe path through rear wall don t remove the hole 3 Drain hose junction Remove the rubber stopple of desired drain direc tion As the following picture Insert drain hose in the ha...

Page 30: ...ll a hole in the wall Drill the piping hole with a ø50mm hole core drill Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side Installation Plate 240mm 19 4 240mm 19 4 60mm 2 4 60mm 2 4 Type A screw Ø 70mm 2 8 Ø 70mm 2 8 5 7mm 0 2 0 3 Indoor WALL Outdoor Measure the wall and mark the centerline It is also important to use caution concerning the lo...

Page 31: ...emoval not possible to put them on after flaring work 4 Flaring work Firmly hold copper pipe in a die in the dimension shown in the table above Carry out flaring work using flaring tool as shown below 5 Check Compare the flared work with figure below If flare is noted to be defective cut off the flared sec tion and re flare it 2 Connection of piping Indoor Preparing the indoor unit s piping and dr...

Page 32: ... nut with a wrench When extending the drain hose at the indoor unit install the drain pipe 5 Wrap the insulation material around the connecting portion Overlap the connection pipe insulation material and the indoor unit pipe insulation material Bind them together with vinyl tape so that there is no gap Wrap the area which accommodates the rear piping housing section with vinyl tape Bundle the pipi...

Page 33: ...the arrow on the wrench Installation Information For right piping Good case For right piping Follow the instruction below Press on the upper side of clamp and unfold the tubing to downward slowly Bad case Following bending type from left to right could cause problem of pipe damage CAUTION mm inch Kgf cm Ø6 35 1 4 180 250 Ø9 52 3 8 340 420 Ø12 7 1 2 550 660 Ø15 88 5 8 630 820 Ø19 05 3 4 990 1210 Ou...

Page 34: ...equired length for wiring 7 Use lock nuts to secure the conduit tubes 1 shows field wiring 2 Separately wire the high and low voltage line 3 Use heat proof electrical wiring capable of withstanding temperatures up to 167 F 4 Use outdoor and waterproof connection cable rated more than 300V for the connection between indoor and outdoor unit For example Type SJO WA Be sure to comply with local codes ...

Page 35: ...n the conduit panel When connecting each power wire to the corresponding terminal follow instructions How to connect wiring to the terminals and fasten the wire tightly with the fixing screw of the terminal plate How to connect wiring to the terminals For solid core wiring or F cable 1 Cut the wire end with a wire cutter of wire cutting pliers then strip the insulation to expose the solid wire abo...

Page 36: ...he wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 Confirm that the starting voltage is maintained at more than 90 percent of the rated volt age marked on the name plate 6 Confirm that the cable thickness is as specified in the power source specification Particularly note the relation between cable length and thickness 7 Always install an GFCI circuit break...

Page 37: ...und pipings with a gum type sealer 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 Fix the piping onto the wall by saddle or equivalent Seal a small opening around the pipings with gum type sealer Trap Trap 1 ...

Page 38: ...terminals on the control board individually according to the outdoor unit connection Ensure that the color of the wires of outdoor unit and the terminal No are the same as those of indoor unit respectively Refer to Wiring diagram on page16 Be sure to refer to the wiring diagram label inside the grille and carry out the correct field wiring Wrong wiring can cause the unit to misoperate to result in...

Page 39: ...from both the gas and the liquid side on the outdoor unit Note that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage 2 Leak test Connect the manifold valve with pressure gauges and dry nitrogen gas cylinder to this service port with charge hoses Pressurize the system to no more than 150 P S I G with dry nitrogen gas and close the cylinder valve when...

Page 40: ...the flare nut securely with an adjustable wrench This process is very important to prevent leakage from the system Replace the valve caps at both gas and liquid side service valves and fasten them tight This completes air purging with a vacuum pump The air conditioner is now ready to test run 1 Remove the caps from the 2 way and 3 way valves 2 Remove the service port cap from the 3 way valve 3 To ...

Page 41: ...embly 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 Drive three screws Panel Front Connector Panel Front Assembly ...

Page 42: ...C 46 F Cool ing or Heating 4 For reference the gas side pressure of optimum con dition is as below Cooling NOTE If the actual pressure is higher than shown the system is most likely over charged and charge should be removed If the actual pressure are lower than shown the system is most likely undercharged and charge should be added The air conditioner is now ready for use Bolt Tubing connection Di...

Page 43: ... to adjust the time 9 TIMER SET CANCEL BUTTON Used to set the timer when the desired time is obtained and to cancel the Timer operation 10 SLEEP MODE AUTO BUTTON Used to set Sleep Mode Auto operation 11 AIR CIRCULATION BUTTON Used to circulate the room air without cooling or heating 12 ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature 13 NEO PLASMA OPTIONAL Used to start or stop ...

Page 44: ...Lift the both lower parts of panel front After pull down this panel a bit separate connecting wire with product 2 To remove the Control Box Before removing the control box be sure to disconnect the wires from PWB Pull the cover control out from the control box and disconnect other wires Remove securing screws Pull the control box out from the chassis carefully CN TH1 CN UD CN DC DC CN LR2 CN LR1 C...

Page 45: ...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 motor shaft Pull the fan out from the motor shaft Remove 4 screws securing motor mount from the chassis and lift up the motor mount and the bracket Top Cover Air Guide Pipe Cover Bolt Motor Mount Bracket Turbo Fan ...

Page 46: ...ifold gauge Open Open Open with charging cylinder Open Open Open with charging cylinder Open Open Open Open Works Shipping Air purging Installation Operation Pumping down Transfering Evacuation Servicing Gas charging Servicing Pressure check Servicing Gas releasing Servicing 1 2 3 4 5 6 Valve cap Open position Closed position Pin Service port Service port cap To outdoor unit Flare nut To piping co...

Page 47: ...e 4 Purge the air from the system Set the 2 way valve to the open position and remove the cap from the 3 way valve s service port Using the hexagonal wrench to press the valve core pin discharge for three seconds and then wait for one minute Repeat this three times 5 Use torque wrench to tighten the service port nut to a torque of 1 8kg cm Caution If gas leakage are discovered in step 3 above take...

Page 48: ... way valve to the closed position 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm2 g 7 Immediately set the 3 way valve to the closed position Do this quickly so that the gauge ends up indi cating 3 to 5kg cm2 g 8 Disconnect the charge set and mount the 2 way and 3 way valve s stem nuts and the ser vice port nut Use torque wrench to tighten the service...

Page 49: ...ghten the flare nut on the 2 way valve 4 Check for gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the gas cylinder and dis charge the refrigerant until the gauge indicates 3 to 5 kg cm2 g 6 Disconnect the charge set and the gas cylin der and set the 2 way and 3 way valves to the open position Be sure to use a hexagonal wrench to operate the v...

Page 50: ...side on the charge set and discharge the refrigerant until the gauge indicates 0 kg cm2 G If there is no air in the refrigerant cycle the pressure when the air conditioner is not run ning is higher than 1 kg cm2 G discharge the refrigerant until the gauge indicates 0 5 to 1 kg cm2 G if this is the case it will not be neces sary to apply a evacuatin Discharge the refrigerant gradually if it is dis ...

Page 51: ...e Lo side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approxima tely 5 minutes after turning off the vacuum pump 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed Lo Open Open Vacuum pump 2 Way valve Outdoor unit Liquid side Indoor unit Gas side 3 Way valve CLOSE OPEN...

Page 52: ...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 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the gas to be dis charged If the system has been charged with liquid refrigerant while operating the air conditioner turn ...

Page 53: ...ng graph Find outdoor temperature Find indoor temperature onto the curve of outdoor temperature Read suction pressure at the axis of ordinates The method of using equation Calculate suction pressure after putting indoor and outdoor temperature into the equation 13 At operating the Unit for 10 minutes Suction Pressure Kg cm 2 g Outdoor Temp C Indoor Temp C 12 11 10 9 8 7 6 5 5 10 15 20 25 30 35 40 ...

Page 54: ...epends on room air humidity When the room air humid ity is relatively 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 Notice 1 The suction pressure is usually 8 5 9 5 kg cm2G at normal condition 2 The temperature can be measured by attaching the thermometer to the low pr...

Page 55: ...r contacting of Outdoor Fan Compressor Display PWB Ass y Check Connector related to CN DC DC Check each load Indoor Outdoor Fan Motor Com pressor Stepping Motor and contacting condition of related connector including connecting cable of Indoor Outdoor Unit NO YES After 20 seconds PCB Board Operation Check Items Power Transformer Outdoor unit Input Voltage Output Voltage IC01D 7812 Output Indoor Ou...

Page 56: ...connector 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 low speed by force Check DISP PWB Ass y Voltage between CN D2 DC 5V When the detect switch double key inside the remote controller door is fault it is impossible to operate temperature regul...

Page 57: ...elated circuit of R02 12 1K R04 6 2K Micom No 27 Indoor unit Check the indoor temperature sensor is disconnected or not About 10kΩ at 77 F When the temperature around Outdoor PWB Ass y is above 163 F the com pressor is stop and only Outdoor Fan is operating Turn off Main Power Check the electrical wiring diagram of outdoor side Check the abnormal condition for the component of Compressor Outdoor F...

Page 58: ...onditions of outdoor unit PWB Assy s Check the connecting condi tion and disconnection of connecting wires between Indoor and Outdoor unit Check the pattern and the condition of Indoor unit PWB Ass y Check the interference of Indoor Fan Does the voltage of each terminals of CN MOTOR CONNECTOR in Indoor unit corresponds to values in the Table of page 63 Check the motor of Indoor Fan Indoor Fan may ...

Page 59: ...onnector Check the operating circuit of the Vertical Louver Confirm that there is DC 12V between pin RED of CN U D CN L R and GND Confirm that there is a soldering short at following terminals Between 62 61 60 and 59 of MICOM Between 57 56 55 and 54 of MICOM Between 51 50 49 and 48 of MICOM Between 1 2 3 4 and 5 of CN U D CN L R If there are no problems after above checks Confirm the assembly cond...

Page 60: ...operating with the remote controller then taking above 2 minutes Apply the power again after about 20 seconds by the power of Outdoor unit is off Check for the communication error and the operating condition of product after also operating with the remote controller then taking above 2 minutes Check the PWB assembly of Indoor and Outdoor unit Caution If the connecting wires of Indoor and Outdoor u...

Page 61: ... operate with a remote controller The operation indicator blinks once on for 0 5 second off for 3 seconds The compressor operates continuously regardless of the setting temperature and the variation of room temperature The operation indicator blinks once on for 0 5 second off for 3 seconds Continuous operation The operation indicator blinks once The compressor and the outdoor fan stop The indoor f...

Page 62: ... inputted The fuse and Q61 in the Outdoor unit are damaged when the indoor fan is operated No power for Indoor unit The signal input of the remote controller and opera tion of product is impossible The RED indicator of the Outdoor unit blinks 5 times after 2 minutes with applying the power All functions stop The operation with the remote controller forced and test one do not operate The only signa...

Page 63: ...nal Input Power TAB N RY COMP A RY COMP B CN DC DC BL BK BR RD BL BK BR RD 1 2 3 2 4 2 1 2 3 2 4 2 1 2 3 2 4 2 OUTDOO R CN DC DC INDOOR CN DC DC INDOOR CN MOTOR No of pins MODELS CONNELTORS S Hi Hi Med Low Off 34 0 32 0 27 8 24 1 34 0 32 0 27 8 24 1 34 0 32 0 27 8 24 1 0 0 5 0 5 0 5 0 5 0 5 0 0 5 0 5 0 5 0 5 5 0 0 12 0 12 0 12 0 12 0 12 17 0 17 0 17 0 17 0 17 0 0 0 0 12 0 12 0 12 0 12 0 12 17 0 17...

Page 64: ...ol Device PWB ASSY SVC PART LIST 1 18K Cooling Model 6871A20387J 12K 20K 27K 12K OPEN OPEN NO MODEL P No OPTIONAL FUNCTION OR1H OR2H OR3H OR4H OR5H OR6H OJ1H OJ2H SHORT TOP VIEW BOTTOM VIEW Electronic Control Device MAIN PWB ASSY Indoor Unit ...

Page 65: ...Electronic Control Device TOP VIEW BOTTOM VIEW MAIN PWB ASSY Outdoor Unit ...

Page 66: ...66 Room Air Conditioner Electronic Control Device TOP VIEW BOTTOM VIEW DISPLAY PWB ASSEMBLY ...

Page 67: ... 6 2 3 1 2 3 1 YL 2 3 PK BL 1 2 3 1 1 BL 4 OR RD 5 1 4 5 STEPPING MOTOR 5 RD OR 3 YL PK 4 5 3 4 4 4 4 4 CN D2 1 2 3 9 8 7 6 5 CN D2 WH 3 2 1 1 2 3 1 2 3 9 9 9 5 6 7 8 5 6 7 8 6 5 7 8 3 2 1 SUB PCB ASM CN D1 WH 1 2 3 1 2 3 1 2 3 12V 103 IC02M KID65004AF KID65004AF IC01M 8 9 5V R01G 220 R04G 220 R03G 220 R02G 220 R07G 220 R06G 220 R05G 220 5V 13 14 16 15 4 3 1 2 10 11 12 7 6 5 6 11 HVB 15 2 16 1 14 ...

Page 68: ...68 Room Air Conditioner Schematic Diagram Outdoor Unit ...

Page 69: ...146811 135500 2 146811 352380 2 352380 1 131410 147581 135311 1 567480 135500 1 135311 3 147581 354210 352150 35211B 349490 330870 135500 3 267110 152302 346810 1 359012 1 346810 2 359012 2 146811 135316 352116 352115 268711 1 135313 159830 Exploded View and Replacement Parts List Indoor Unit ...

Page 70: ...67110 REMOTE CONTROLLER ASSEMBLY 6711A20083R R 268712 PWB PCB ASSEMBLY DISPLAY 6871A20462D R 268714 PWB PCB ASSEMBLY MAIN 6871A20387J R 330870 DRAIN PAN ASSEMBLY 3087A20013B R 346810 1 MOTOR ASSEMBLY INDOOR 4681A20047C R 346810 2 MOTOR ASSEMBLY INDOOR 4681A20047D R 349490 ORIFICE ASSEMBLY 4949A20002C R 352115 TUBE ASSEMBLY EVAPORATOR IN 5211A20302C R 352116 TUBE ASSEMBLY EVAPORATOR OUT 5211A20301F...

Page 71: ...Parts List 2 Outdoor unit 18K 435512 437210 559010 546810 55211G 554031 437212 435511 447910 552202 561410 567502 1 552116 566000 430410 649950 263230 1 263230 2 668711 W0CZZ 2 W0CZZ 1 552203 2 552203 1 554160 1 554160 2 567502 2 550140 550140 263230 ...

Page 72: ...SY OUTDOOR 3041AP2741G R 435511 COVER ASSY CONTROL OUTDOOR 3551AR7184T R 437210 PANEL ASSY FRONT OUTDOOR 3721A20005H R 437212 PANEL ASSY REAR OUTDOOR 3720AP0003D R 550140 2 ISOLATOR COMP 4H00637A R 546810 MOTOR ASSY OUTDOOR 4681A20013N R 566000 SWITCH PRESSURE 6600L000013 R 435512 COVER ASSY TOP OUTDOOR 3H03266P R 55211G TUBE ASSEMBLY CONDENSER OUT 5211A25034C R 552200 VALVE EXPANSION BODY 5220A90...

Page 73: ...P No 3828A20065Y Printed in Korea ...

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LG ARTCOOL LA180CP, Service Manual

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