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LG LS-C246TLB3, Service Manual

The LG LS-C246TLB3 Service Manual is available for free download at manualshive.com. This comprehensive manual provides detailed instructions and troubleshooting tips to ensure optimal performance of the LG LS-C246TLB3. Easily access this manual and enhance your experience with this top-notch LG product.

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Room Air Conditioner

Air Conditioner Service Manual

TABLE OF CONTENTS

LG Model Name

...............................................................................................................................................3

Safety Precautions

..........................................................................................................................................4

Dimensions

......................................................................................................................................................8

Symbols Used in this Manual .....................................................................................................................8
Indoor Unit..................................................................................................................................................8
Outdoor Unit ...............................................................................................................................................9

Product Specifications

................................................................................................................................12

Installation

.....................................................................................................................................................13

Selection of the Best Location..................................................................................................................13
Piping Length and Elevation.....................................................................................................................13
How to Fix Installation Plate .....................................................................................................................14
Drill a Hole in the Wall ..............................................................................................................................14
Flaring Work .............................................................................................................................................15
Connection of Piping Indoor .....................................................................................................................16
Connection of the Pipes-Outdoor .............................................................................................................19
Connect the Cable to the Indoor Unit. ......................................................................................................20
Connect the Cable to the Outdoor Unit ....................................................................................................21
Checking the Drainage.............................................................................................................................22
Form the Piping ........................................................................................................................................22
Air Purging ...............................................................................................................................................23
Air Purging with Vacuum Pump................................................................................................................23
Main Unit Function ...................................................................................................................................26
Display Function ......................................................................................................................................33
Self-diagnosis Function ............................................................................................................................33
Remote Control Operations......................................................................................................................34

Disassembly

..................................................................................................................................................36

Indoor Unit................................................................................................................................................36

Schematic Diagram

.......................................................................................................................................39

Electric Control Device .............................................................................................................................39
Cooling Model ..........................................................................................................................................40
Heat Pump Model ....................................................................................................................................42
Wiring Diagram.........................................................................................................................................44
Components Location ..............................................................................................................................45

Troubleshooting Guide

................................................................................................................................47

Refrigeration Cycle Diagram ....................................................................................................................47
2-way, 3-way Valve .................................................................................................................................48
Cycle Parts ...............................................................................................................................................55
Electronic Parts ........................................................................................................................................56

Exploded View

..............................................................................................................................................63

Replacement Parts List

................................................................................................................................66

Summary of Contents for LS-C246TLB3

Page 1: ...ner SERVICE MANUAL LG MODELS LS H186TNA2 LS H186TGD3 LS H246TNB0 LS C246TLB3 CAUTION website http www lgservice com BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE PERSONNEL ...

Page 2: ...on of the Pipes Outdoor 19 Connect the Cable to the Indoor Unit 20 Connect the Cable to the Outdoor Unit 21 Checking the Drainage 22 Form the Piping 22 Air Purging 23 Air Purging with Vacuum Pump 23 Main Unit Function 26 Display Function 33 Self diagnosis Function 33 Remote Control Operations 34 Disassembly 36 Indoor Unit 36 Schematic Diagram 39 Electric Control Device 39 Cooling Model 40 Heat Pum...

Page 3: ...50Hz E 265V 60Hz 7 110V 50 60Hz F 200V 50 60Hz 8 380 415V 50Hz 9 380 415V 60Hz 7 Chassis A Z Name of Chassis of Unit Ex LSP SP Chassis 8 Look A Z Look Color Artcool Model 9 Function A Z 10 Serial No 1 9 LG Model De ARTCOOL COLOR velopment Serial No Basic A Basic 4Way B Plasma Filter C Plasma Filter 4 Way D Tele LCD E Tele LCD Nano plasma 4Way F Nano Plasma F A changeove A clean Low A G Nano Plasma...

Page 4: ...roperties only Be sure not to do Be sure to follow the instruction Do not use damaged power cords plugs or a loose socket There is risk of fire or electric shock Always use the power plug and socket with the ground terminal There is risk of electric shock Install the panel and the cover of control box securely There is risk of fire or electric shock Installation Do not modify or extend the power c...

Page 5: ...air conditioner run for a long time when the humidity is very high and a door or a window is left open Moisture may condense and wet or damage furnishings Always install a dedicated circuit and breaker Improper wiring or installation may cause fire or electric shock Use the correctly rated break er or fuse There is risk of fire or electric shock Operation Do not turn the air conditioner ON or OFF ...

Page 6: ...e a heater or other appliances near the power cable There is risk of fire failure of the product and or electric shock Do not allow water to run into electric part There is risk of fire failure of the product and or electric shock Do not store of use flammable gas or combustibles near the air conditioner There is risk of fire or failure of product Wax Thinner Always check for gas refriger ant leak...

Page 7: ...to the plastic parts of the product Do not touch the metal parts of the product when removing the air filter They are very sharp There is risk of personal injury Do not step on or put anything on the product outdoor unit There is risk of personal injury and failure of product Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in There are shar...

Page 8: ... W mm 1 090 H mm 314 D mm 172 Model Dimension ALL MODELS Indoor Unit This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that could cause harm to the air conditioner This symbol indicates special notes NOTICE Symbols Used in this Manual ...

Page 9: ...s W D L1 L2 H L3 L4 L5 L6 L7 L8 L9 L10 Liquid side 2 way valve Gas side 3 way valve MODEL DIM unit W mm 801 H mm 555 D mm 262 L1 mm 339 L2 mm 37 L3 mm 543 6 L4 mm 11 4 L5 mm 591 L6 mm 105 L7 mm 105 L8 mm 72 5 L9 mm 86 4 L10 mm 77 LS H186TNA2 ...

Page 10: ...1 L2 L3 L10 L11 L4 L5 H Gas side Liquid side LS C246TLB3 LS H246TNB0 MODEL DIM W mm 840 H mm 577 D mm 276 L1 mm 337 L2 mm 321 L3 mm 8 L4 mm 562 L5 mm 15 L6 mm 610 4 L7 mm 53 L8 mm 206 6 L9 mm 54 L10 mm 74 5 L11 mm 79 L12 mm 55 L13 mm 639 4 L14 mm 145 6 Dimensions ...

Page 11: ...5 L6 L7 L8 L9 L10 Liquid side 2 way valve Gas side 3 way valve MODEL DIM unit W mm 870 H mm 655 D mm 320 L1 mm 370 L2 mm 340 L3 mm 25 L4 mm 630 L5 mm 25 L6 mm 546 L7 mm 162 L8 mm 162 L9 mm 54 L10 mm 74 5 LS H186TGD3 Outdoor Unit Dimensions ...

Page 12: ...ration Drain Hose Connecting Cable Power Cord 18000 18000 24000 24000 18000 19000 2 2 2 2 2 88 2 88 1Ø 220 240V 50Hz 1Ø 220 240V 50Hz 1Ø 220 240V 50Hz 1Ø 220 240V 50Hz 12 5 13 5 14 6 14 7 35 42 42 42 42 40 47 49 56 53 58 59 2100 1860 2700 2700 1870 1870 9 6 9 2 12 6 11 5 9 2 9 2 8 58 9 69 9 8 89 2 82 2 98 22 22 35 35 27 61 82 9 82 9 1 090 x 314 x 172 1 090 x 314 x 172 1 090 x 314 x 172 1 090 x 314...

Page 13: ...ace 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 More than A More than B More than 2 3m More than B More than 10cm More than 10cm More than 60cm More than 60cm More than 70cm Install the indoor unit on the wall where the height from the floors more than 2 3 meters Capacity is based on standard length and maxi...

Page 14: ...i cally Drilling the hole through the wall for pip ing connections must be done safely Drill the piping hole with a ø70mm 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 Type A screw 5 7mm 3 16 5 16 Indoor WALL Outdoor Installation plate Ø70mm Left rear piping Right rear piping C D B A Ø70mm Ø70mm Left rear...

Page 15: ...ting nut on Remove flare nuts attached to indoor and outdoor unit then put them on pipe tube having completed burr removal not possible to put them on after flaring work 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 Check Compare the flared work with figure below If flare is noted to be defective cut...

Page 16: ...the hose with an insulation material so that dripping from sweating condensation will not damage furni ture or floors Foamed polyethylene or equivalent is recommend ed 4 Indoor unit installation Hook the indoor unit onto the upper portion 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 that the hooks are prop er...

Page 17: ...yl tape for enough to cover where they fit into the rear piping housing section For left rear 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 mm inch kg m Ø6 35 1 4 1 8 Ø9 52 3 8 4 2 Ø12 7 1 2 5 5 Ø15 88 5 8 6 6 Ø19 05 3 4 6 6 Outside diameter Torque Wrench Indoor unit tubing Open ...

Page 18: ...re nut with a wrench When extending the drain hose at the indoor unit install the drain pipe 7 Wrap the insulation material around the con necting portion Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material Bind them together with vinyl tape so that there is no gap Wrap the area which accommodates the rear pip ing housing section with vinyl tape mm inch kg...

Page 19: ...ft and right Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots clicking sound 1 Align the center of the pipings and sufficiently tighten the flare nut by hand 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...

Page 20: ... SAA 7k 14k 18k 24k 28k 30k 32k 36k 38k 1 0 1 5 2 5 2 5 5 5 Unit A Indoor Indoor Indoor Outdoor Outdoor Cable Type B H05VV F H05VV F H05VV F H05RN F H05RN F NORMAL CROSS SECTIONAL AREA Grade 7k 14k 18k 24k 28k 1 0 1 5 2 5 Cable Type B H07RN F H07RN F H07RN F NORMAL CROSS SECTIONAL AREA Grade 30k 32k 36k 38k 0 75 0 75 Cable Type B H07RN F H07RN F NORMAL CROSS SECTIONAL AREA Grade mm2 mm2 mm2 The ab...

Page 21: ...ich 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 could cause burn out of the wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 6 Confirm that the cabl...

Page 22: ...ould 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 Tape the piping drain hose and connecting cable from down to up Secure the tapped piping along the exterior wall using saddle or equivalent 3 In cases where the Outdoor unit is installed above the Indoor unit perform the following Tape the p...

Page 23: ... 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 cylin der valve when the gauge reading reached 150 P S I G Next test for leaks with liquid soap Do a leak test of all joints of the tubing both indoor and outdoor and both gas and liquid side service valves Bubbles indicate a leak Be sure to wipe off the soap with ...

Page 24: ...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 25: ...ting 4 For reference the gas side pressure of optimum condition is as below Cooling 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 NOTICE NOTICE Bolt Tubing connection Discharge temper...

Page 26: ...sconnection 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 during heating mode operation or while in defrost control Plasma Indicator On while in plasma mode of...

Page 27: ...ct the evaporator pipe of the outdoor unit from freezing reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit After 40 min heating mode operation at 4 min 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 mea...

Page 28: ...nd 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 carr...

Page 29: ...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 Air Temp In...

Page 30: ...leep 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 s...

Page 31: ...wer button is pressed If you want to stop operation re press the button While in forced operation the key input by the remote control has no effect and the buzzer sounds 10 times to indicate the forced operation Test operation During the TEST OPERATION the unit operates in cooling mode at high speed fan regardless of room tem perature and resets in 18 1 minutes During test operation if remote cont...

Page 32: ...oor 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 be...

Page 33: ... point Operation Display Function 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 PLASMA Mode PLASMA Mode Operation Indicator Timer Indicator Sleep Timer Indicator Defrost Indicator PLASMA Indicator Operation Indicator Timer Indicator Sleep Timer Indicator Compressor on Indicator Compressor on Indicator...

Page 34: ...EL 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 ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature PLASMA OPTION Used to start or stop the NANO PLASMA purification function RESET BUTTON U...

Page 35: ...to adjust the time TIMER SET CANCEL BUTTON 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 ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature PLASMA OPTIONAL Used to start or stop the NANO PLASMA pur...

Page 36: ...n 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 Before removing the control box be sure to take out the wire screwed at the other end Display P C B Conductor Step Motor Conductor Earth Conductor Motor Conductor Sensor Cond...

Page 37: ...ing screws Pull the control box out from the chassis carefully 3 To remove the Discharge Grille Unhook the discharge grille and pull the discharge 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 Caution label ...

Page 38: ...he 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 Remove the left end of the cross flow fan from the self aligning bearing Motor cover ...

Page 39: ...Service Manual 39 Schematic Diagram Schematic Diagram TELEPHONE CONTROL MODEL ONLY Electric Control Device ...

Page 40: ...40 Room Air Conditioner Schematic Diagram Cooling Model LED TYPE ...

Page 41: ...Service Manual 41 Schematic Diagram HVB TYPE PLASMA ...

Page 42: ...8 7 6 5 EEPROM Vcc SCL SDA WP G 1 2 3 A0 A1 4 A2 CAT24WC01J R14H R13H R12H 20K R01P 2012 R02P 20K 2012 OJ4H 5V 8 20K R02F 7 3 4 5 2 6 1 5V Vss0 Vdd0 C04C 103 A d 1 d V NEC TERMINAL BOARD STO2D 200 SD01D TNY266P DC HIGH VOLTAGE GND D 5 4 1 IC02D DC HIGH VOLTAGE GND TLP421 V4 BL C05D 472M 3 2 104 50V C02D EN 4 S 2 BP 1 D07D UG2D 470 35V SD C03D 681 RY 4WAY 1 6W R03D 39 C04D 1 8 5V CN ACDC CN ACDC2 I...

Page 43: ... 5 6 5V Q12G Q11G KRA107S KRA107S KRA107S Q13G 5V R13H OJ1H R11H R12H OJ2H OJ3H 5 6 7 8 A2 4 A1 A0 3 2 1 G WP SDA SCL Vcc EEPROM R14H CAT24WC01J 5V 2012 20K R02P 2012 R01P 20K OJ4H Force 1 8 IC01G 5V 5V 6 5 7 4 3 2 Vdd0 Vss0 C04C 103 R02F 20K V d 1 d A NEC STEPPING MOTOR UP DOWN 9 DC PART BL PK 5 4 RD 1 OR YL 2 3 5 CN U D 4 1 2 3 INDOOR FAN 12V HVB OUT COMP 7 5 6 4 1 IC01M 8 2 3 1 STEPPING MOTOR 2...

Page 44: ...J CN CONT TRIAC AC PWB ASM DC PWB ASM CN TAB RY COMP TO OUTDOOR UNIT 4 3 1 L BR BR BL GN YL 2 N FUSE 250V T2A STEP MOTOR H V ASM S W1 S W2 AIR CLEAN PLASMA GN YL GN YL INDOOR WIRING DIAGRAM Indoor Unit Heat pump only Indoor Unit Cooling only LS H186TNA2 LS H186TGD3 LS H246TNB0 LS C246TLB3 LS H246TNB0 LS C246TLB3 LS H186TNA2 LS H186TGD3 C S R RD YL YL GN YL GN YL GN YL BR BL BK RD YL YL BR OR BL BK...

Page 45: ...Service Manual 45 Schematic Diagram Components Location MAIN P W B ASSEMBLY AC PART COOLING MODEL HEAT PUMP MODEL MAIN P W B ASSEMBLY DC PART TOP VIEW BOTTOM VIEW ...

Page 46: ...46 Room Air Conditioner Schematic Diagram DISPLAY ASSEMBLY 6871A20390 TOP VIEW BOTTOM VIEW 6871A20227 TOP VIEW BOTTOM VIEW K K ...

Page 47: ...GE EVAPORATOR HEAT EXCHANGE CONDENSER HEAT EXCHANGE CONDENSER COMPRESSOR COMPRESSOR ACCUMU LATOR GAS SIDE GAS SIDE 3 WAY VALVE LIQUID SIDE LIQUID SIDE 3 WAY VALVE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE Heating Model only COOLING HEATING REVERSING VALVE Heating Model Only 1 Cooling Only Models Refrigeration Cycle Diagram 2 Cooling Heating Models ...

Page 48: ...ckwise connected manifold 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 Fl...

Page 49: ...e 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 6 Set the 3 way valve to the back seat 7 Mount the valve stem nuts to the 2 way and 3 way valves 8 Check for gas leakage At this time especially check for gas leakage from the 2 way...

Page 50: ... the charge hose Open the low pressure valve on the charge set slightly to air purge from the charge hose 5 Set the 2 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 s...

Page 51: ...nch to tighten the flare nut on liquid side 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 Liquid side and Gas side valves to the open position Be sure to use a hexagonal wre...

Page 52: ...charge set and discharge the refrigerant until the gauge indi cates 0 kg cm2 G If there is no air in the refrigerant cycle the pressure when the air conditioner is not running is higher than 1 kg cm2 G discharge the refrig erant 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 charged too...

Page 53: ...d 76 cmHg vacuum of 4 mmHg or less 3 Close the valve 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 3 Way valve Outdoor unit Liqu...

Page 54: ... 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 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 ...

Page 55: ...humidity When the room 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 1 The suction pressure is usually 4 5 6 0 kg cm2 G Cooling at normal condition 2 The temperature can be measured by attaching the thermometer to the low pressure tubing and ...

Page 56: ...age Varistor ZNR01J Check the connection housing for contacting Connector related to CN TAB1 RY COMP NO 3 Connector related to CN MOTOR Connector contacting of Outdoor Fan Compressor Display PCB Assembly Check Check each load Indoor Outdoor Fan Motor Compressor Stepping Motor and contacting condition of related connector Main PCB Board Operation Check Items SMPS Transformer Indoor unit Input Volta...

Page 57: ...CD screen replace battery Check the contact of CN DISP1 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 Display PCB Assembly Voltage between CN DISP1 DC 5V Check the connecting circuit between the remote controlle...

Page 58: ...e not engaged Compressor Outdoor Fan is stopped Check the related circuit of RY FAN Check the indoor temperature sensor is disconnected or not About 10kΩ at 25 C Turn off Main Power Check the electrical wiring diagram of outdoor side Check the abnormal condition for the component of Compressor Outdoor Fan Motor Check the open or short of conmecting wires between indoor and outdoor Check Relay RY C...

Page 59: ...Check the related circuit of indoor Fan Motor The pin NO 63 of Micom and the part for driving TRIAC the input and output signal of IC01M PIN NO 7 10 Check the pattern Check the TRIAC TRIAC Open Indoor Fan Motor never operate TRIAC short Indoor Fan Motor always operates in case of ON or OFF When indoor Fan does not operate The voltage of PIN NO 1 orange and 3 yellow of CN MOTOR About AC 180V over A...

Page 60: ... condition on PWB of CN U D Connector If there are no problems after above checks Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver When Vertical Louver does not operate Check the operating circuit of the Vertical Louver Confirm that there is DC 12V between pin RED of CN U D and GND Confirm that there is a soldering short at follo...

Page 61: ...re is disconnected or not about 10KΩ at 25 C Check the indoor pipe temperature is disconnected or not about 5KΩ at 25 C Turn ON Main Power Check the DC voltage on the PWB ASSEMBLY The details of check are as followings Check point Between Micom NO 59 and GND Between IC01M NO 11 and GND Comp ON DC 5V Below DC 1V Comp OFF DC 0V About DC 12V Check point Between Micom NO 51 and GND Between IC02M NO 11...

Page 62: ...ing Guide Turn off Main Power 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 ...

Page 63: ...w 346810 35211B 135516 352150 146811 2 266090 267110 1 267110 1 146811 1 354212 131410 135511 359011 342800 159901 1 159901 2 268712 159830 135311 135312 249951 733010 152313 135314 152302 668713 268714 1 268714 2 W6640 263230 264110 Indoor Unit ...

Page 64: ... View 554032 437212 435511 668713 W0CZZ 1 W0CZZ 2 552202 552116 553000 554160 550140 552203 2 552203 1 430410 435301 447910 649950 552111 552201 552102 2 437210 559010 435512 546810 552102 1 567502 Outdoor Unit LS H186TNA2 LS H186TGD3 ...

Page 65: ...l 65 Exploded View 554032 437212 435511 668713 W0CZZ 1 W0CZZ 2 552202 552116 553000 554160 550140 552203 2 552203 1 430410 447910 649950 552102 437210 559010 435301 546810 567502 Outdoor Unit LS C246TLB3 LS H246TNB0 ...

Page 66: ...A20004K 6323A20004K 6323A20004K 6323A20004K R 264110 POWER CORD ASSEMBLY 6411A20026F 6411A20026F 6411A20026G 6411A20026G R 267110 REMOTE CONTROLLER ASSEMBLY 6711A20067S 6711A20083A 6711A20028H 6711A20083C R 268712 PWB PCB ASSEMBLY DISPLAY 6871A20390D 6871A20227E 6871A20390B 6871A20390B R 268714 1 PWB PCB ASSEMBLY MAIN AC 6871A20272A 6871A20272A 6871A20272V 6871A20272B R 268714 2 PWB PCB ASSEMBLY M...

Page 67: ...E SERVICE 2H02200E 2H02479F 5220A20002C 5220A20002C R 552203 2 VALVE SERVICE 2H01890R 2H01890P 2A00392E 2A00392E R 554032 CONDENSER ASSEMBLY BENT 5403AR6027X 5403A10013B 5403A20164A 5403A20164B R 554160 COMPRESSOR 2520UHCP2CA 5416A20016A 2520UHMP2BA 2520UHMP2AB R 559010 FAN ASSEMBLY PROPELLER 5900AR1119B 1A00195B 5901A10032A 5901A10032A R 561410 COIL ASSEMBLY REVERSING VALVE 6141A20010E 6141AR3733...

Page 68: ...P No 3828A20173N September 2004 Printed in Korea ...

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