LG LA140CE Service Manual Download

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Room Air Conditioner

Schematic Diagram

IC9

IC10

TLP521-1BL

CN-DC/DC

470uF

20V

C05

220

VR71

R75

23.2K

100uF

25V

C73

R74

5.1K

29.4K

20K

34K

1.06K

102

D92

C92

50V

1N4148

104

IC7

5.23K

13K

HCP6068

R95

D91

1N4148

2.7K

R92

DC 5V

ZD81

5.1V

R91

6.8K

R82

R81

XXX

NTC1

DKS-80-13

ZNR1

INR14D471K

35V

2200uF

103

C06

470uF

25V

C03

104

C02

50V

103

C04

C01

C66

63V

2SD2220

680uF

IC3

7805

100K

R68

10K

R64

Q62

C67

100V

473K

R67

1.5K

7812

IC2

12V

103K

100V

C60

17V

102J,100V

C69

C68

821K,1KV

C65

ST2

POWER TRANS

CN-TRANS

S1VB60

BD01

C62

1KV

222K

R65

D61 ERB44-08

30,1W

Q61

2SK2671

ZD61

12V

R66

200

101K

1KV

C63

68K

R63

R62

1/2W

560K

100uF

C61

450V

AC230V/60Hz

FUSE

250V/3.15A

150-F06M

COIL1

CN-POWER

G4A-1A

RY-COMP

WXE-334K

N/FILTER1

RY-FAN,4WAY,HEATER

RY-4WAY,G5N-1A

RY-HEATER

RY-FAN

G5N-1A

COIL2

LS404060

CN-4WAY

CN-FAN

GMS81C1408SK(HYUNDDAI:8K)

TMR20V/RB7

SRDYIN/SRDYOUT/RC3

AN0/Aref/RB0

PWM0/COMP0/RB4

PWM1/COMP1/RB5

R97 1K

RY-HEATER

RY-COMP

RY-FAN

R96 620

RY-4WAY

100V

102J

C72

R73

13K 1%

6.04K

51.1K

L61

L62

FMX12S

L63

L64

D62

ST1

100Uf

R72

11K

C71

25V

10.2K

LED92

21.5K

39.2K

35.7K

4.3K

103

C91

R94

180

R93

390

R90

LED91

DC12V

KRA102M

DC 5V

R71

Q71

9 9

MICOM

IC01M

KID65004APKID65004AP

EC1/RB6

INTO/RB2

INT1/RB3

BUZ/RB2

12.1K

R27

OR7

OR8

XXX

R28

12.1K

OR5

OR4

OR6

XXX

12.1K

R25

R24

12.1K

R26

DC 5V

TH1

R32H

R31H

12.1K

AN7/RA7

Vdd

AN6/RA6

AN5/RA5

AN4/RA4

DC 5V

R02A

10K

BD61

U4SBA60

RC4/SCK

RC5/SIN

Xout

RC6/SOUT

RD2

Xin

RD0/INT2

RESET

Vss

R01B 1M

R01A

C01A

103

50V

CST-4.00MTW

OSC01B

7036P

R03A

100

C02A

10uF

IC4

DC 5V

RD1/INT3

RA0/EC0

RA1/AN1

RA2/AN2

RA3/AN3

10K

C11H

103

R11H

10K

KEY

TEST

R12H

DC 5V

2. Outdoor Unit

Summary of Contents for LA140CE

Page 1: ...LG Room 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 MODELS LA140CE ...

Page 2: ... Cables 19 Connection method of the connecting cable Example 20 Connect the cable to the indoor unit 21 Checking the Drainage 22 Forming the Piping 23 Air Purging 24 Test Running 26 Operation 28 Function of Controls 28 Display Function 34 Self diagnosis Function 34 Remote Control Operations 35 Disassembly 36 Indoor Unit 36 Schematic Diagram 39 Electric control Device 39 Wiring Diagram 41 Component...

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: ...e not to do Be sure to follow the instruction Installation Always perform grounding Otherwise it may cause electrical shock Don t use a power cord a plug or a loose socket which is damaged Otherwise it may cause a fire or electrical shock For installation of the product always contact the service center or a professional installation agency Otherwise it may cause a fire electrical shock explosion ...

Page 5: ...ace that ther is concern of falling down Otherwise it may result in personal injury Use caution when unpacking and installing Sharp edges may cause injury Do not share the outlet with other appliances It will cause an electric shock or a fire due to heat generation Do not use the damaged power cord Otherwise it may cause a fire or electrical shock Do not modify or extend the power cord randomly Ot...

Page 6: ...of machine or electrical shock Hold the plug by the head when taking it out It may cause electric shock and damage Never touch the metal parts of the unit when removing the filter They are sharp and may cause injury Do not step on the indoor outdoor unit and do not put anything on it It may cause an injury through dropping of the unit or falling down Do not place a heavy object on the power cord O...

Page 7: ...t Keep level parallel in installing the product Otherwise it may cause vibration or water leakage Avoid excessive cooling and perform ventilation sometimes Otherwise it may do harm to your health Use a soft cloth to clean Do not use wax thinner or a strong detergent The appearance of the air conditioner may deteriorate change color or develop surface flaws Do not use an appliance for special purpo...

Page 8: ... Indoor Unit This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that may cause harm to the air conditioner This symbol indicates special notes NOTICE Symbols used in this Manual MODEL DIM Unit W mm 1030 H mm 290 D mm 153 14K Btu Series ...

Page 9: ...ce Manual 9 W L2 L3 L1 D H L4 L5 Gas side 3 way valve Liquid side 2 way valve MODEL 14K Btu Series DIM unit W mm 770 H mm 540 D mm 245 L1 mm 285 L2 mm 64 L3 mm 518 L4 mm 10 L5 mm 100 Dimensions Outdoor Unit ...

Page 10: ...ow Direction Control Up Down Remocon Type inch mm Sleeping Operation Drain Hose Connecting Cable p mm2 Power Cord p mm2 Air Circulation Noise Level Input m3 min dB A 3 Indoor Outdoor Indoor Outdoor Indoor Outdoor Indoor Outdoor Indoor Outdoor Liquid Gas Service Valve Motor Output Dimensions W x H x D Net Weight W mm kg LA140CE 14000 1 5 1Ø 115V 60Hz 9 26 41 48 1400 13 10 0 24 27 1030 x 290 x 153 7...

Page 11: ...space 3 Do not place animals and plants in the path of the warm air 4 Take the weight of the air conditioner into account and select a place where noise and vibration are minimum 5 Select a place where the warm air and noise from the air conditioner do not disturb neighbors Select the best Location More than 10cm 3 9 More than 5cm 1 96 More than 2 3m 7 5ft More than 5cm 1 96 CAUTION Install the in...

Page 12: ...e location of the installation plate routing of the wiring to power outlets is through the walls typically Drilling the hole through the wall for piping connections must be done safely Fixing Installation Plate Installation Plate Type A screw Installation plate Ø70mm 2 76 Left rear piping Right rear piping C D B A Ø70mm 2 76 SU Drill the piping hole with a ø70mm 2 76 hole core drill Drill the pipi...

Page 13: ...s into the tubing Putting 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 1 Firmly hold copper pipe in a die in the dimension shown in the table below 2 Carry out flaring work with the flaring tool Copper pipe 90 Slanted Uneven Rough Pipe Reamer Point down Flare nut Cop...

Page 14: ...or tubing and the drain hose in the direction of rear right 2 Insert the connecting cable into the indoor unit from the outdoor unit through the piping hole Do not connect the cable to the indoor unit Make a small loop with the cable for easy connec tion later 3 Tape the tubing drain hose and the connecting cable Be sure that the drain hose is located at the lowest side of the bundle Locating at t...

Page 15: ...Wrap the insulation material around the connecting portion 1 Overlap the connection pipe insulation material and the indoor unit pipe insulation material Bind them together with vinyl tape so that there may be no gap 2 Wrap the area which accommodates the rear piping housing section with vinyl tape 3 Bundle the piping and drain hose together by wrap ping them with vinyl tape for enough to cover wh...

Page 16: ...tc between the indoor unit and the installation plate and separate the bottom of the indoor unit from the wall Connecting the piping to the indoor unit and the drain hose to drain pipe 1 Align the center of the pipes and sufficiently tighten the flare nut by hand 2 Tighten the flare nut with a wrench 3 When extending the drain hose at the indoor unit install the drain pipe For left rear piping Dra...

Page 17: ...pings and the drain hose to the back of the chassis with the tubing holder Hook the edge of tubing holder to tap on chassis and push the bottom of tubing holder to be engaged at the bottom of chassis Indoor unit installation 1 Remove the spacer 2 Ensure that the hooks are properly seated on the installation plate by moving it left and right 3 Press the lower left and right sides of the unit agains...

Page 18: ...g 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 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 Outdoor unit...

Page 19: ... codes while running the wire from the indoor unit to the outdoor unit size of wire and wiring method etc Every wire must be connected firmly No wire should be allowed to touch refrigerant tubing the compressor or any moving parts Power Supply NOTICE 1 Indoor Unit Outdoor Unit 2 3 4 1 2 3 4 5 6 G To branch circuit Ground Power supply a L1 L2 Connecting cable Low voltage b Terminal 4P Terminal 6P W...

Page 20: ...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 cut ting pliers then strip the insulation to expose the solid wire about 25mm 15 16 2 Using a screwdriver remove the terminal screw s on the terminal plate 3 Using pliers bend the solid wire to from a loop suitable for the terminal screw 4 Shape the loop wire properly place it on t...

Page 21: ... edge of the chas sis Press the Grille toward the chassis until it will be back into place Connect the cable to the indoor unit CAUTION Provide a circuit breaker between power source and the unit as shown below WARNING Be sure to refer to the wiring diagram label inside the cover control and carry out the correct field wiring Wrong wiring can cause the unit to misop erate to result in a fire hazar...

Page 22: ...y leakage and goes out the drain exit Drain piping 1 The drain hose should point downward for easy drain flow 2 Do not make drain piping like the following Drain pan Drain hose Leakage checking Connecting area drain hose Leakage checking Downward slope Do not raise Accumulated drain water Tip of drain hose dipped in water Air Waving Water leakage Water leakage Ditch Less than 50mm gap Water leakag...

Page 23: ...e and connecting cable from down to up 2 Secure the tapped piping along the exterior wall using saddle or equivalent In cases where the Outdoor unit is installed above the Indoor unit perform the following 1 Tape the piping and connecting cable from down to up 2 Secure the taped piping along the exterior wall Form a trap to prevent water entering the room 3 Fix the piping onto the wall by saddle o...

Page 24: ...trogen gas cylinder to this service port with charge hoses CAUTION Be sure to use a manifold valve for air purging If it is not available use a stop valve for this purpose The Hi knob of the manifold valve must always be kept close Pressurize the system to no more than 150 P S I G with dry nitrogen gas and close the cylinder valve when the gauge reading reached 150 P S I G Next test for leaks with...

Page 25: ... knob of the manifold valve and stop the vacuum pump Finishing the job 1 With a service valve wrench turn the valve stem of liquid side valve counter clockwise to fully open the valve 2 Turn the valve stem of gas side valve counter clockwise to fully open the valve 3 Loosen the charge hose connected to the gas side ser vice port slightly to release the pressure then remove the hose 4 Replace the f...

Page 26: ...nstalling on the wall roof or rooftop anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake 3 If the vibration of the unit is transmitted to the hose secure the unit with an anti vibration rubber Evaluation of the performance Operate the unit for 15 20 minutes then check the sys tem refrigerant charge 1 Measure the pressure of the gas side service valv...

Page 27: ...ant CAUTION Be sure to perform Pump Down procedure in the cooling mode Pump Down Procedure 1 Connect a low pressure gauge manifold hose to the charge port on the gas side service valve 2 Open the gas side service valve halfway and purge the air in the manifold hose using the refrigerant 3 Close the liquid side service valve all the way 4 Turn on the unit s operating switch and start the cooling op...

Page 28: ...e in appliance pause Timer Indicator On while in timer mode on off and in sleep timer mode off when timer mode is completed or canceled Defrost Indicator Off except when hot start during heating mode operation or while in defrost control Auto restart Indicator On while auto restart mode off while auto restart mode is canceled Auto restart In case the power comes on again after a power failure Auto...

Page 29: ... fan is off when the indoor pipe temp is below 33 C when above 35 C it operates with the low airflow speed If overloaded while in heating mode operation in order to prevent the compressor from OLP operation the out door fan is turned on off according to the indoor pipe temp While in defrost control both of the indoor and outdoor fans are turned off Defrost Control While in heating mode operation i...

Page 30: ... carried out for 10 sec or longer before Fuzzy operation the mode before Fuzzy operation is operated 1 Fuzzy Operation for Cooling According to the setting temperature selected by Fuzzy rule when the intake air temp is 0 5 C or more below the setting temp the compressor is turned off When 0 5 C or more above the setting temp the compressor is turned on Compressor ON Temp Setting Temp 0 5 C Compres...

Page 31: ...d according to the intake air temp at that time 20 C Intake Air Temp Intake Air Temp 0 5 C Intake Air Temp 20 C 20 C When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule While in Fuzzy operation the...

Page 32: ...t Cool mode operates In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet Cool mode operation the room temperature is controlled to the setting temperature 18 C When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority During the JET COOL function at any moment the A C starts to blow the...

Page 33: ...operation mode the compressor and the outdoor fan are turned off in order to protect the indoor evapo rator pipe from frosting When the indoor pipe temp is 7 C or higher after 3 min pause of the compressor the compressor and the out door 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 ...

Page 34: ...rature thermistor open short Indoor Thermistor assembly check SVC check 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 Operation Indicator Timer Indicator Sleep Timer Indicator Defrost Indicator Operation Indicator Timer Indicator Sleep Timer Indicator Outdoor Unit Oper...

Page 35: ...S SWING BUTTON Used to stop or start louver movement and set the desired up down airflow direction 7 ON OFF TIMER BUTTONS Used to set the time of starting and stopping opera tion 8 TIME SETTING BUTTONS Used 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 oper...

Page 36: ... to OFF To remove the Grille from the Chassis Hold up Inlet Grille Horizentally To remove the Grille pull the lower left and right side of the grille toward you slightly tilted and lift it straight upward To seperate connecter assembly and than to remove Inlet Grille assembly 1 Before removing the control box be sure to take out the wire screwed at the other end ...

Page 37: ...the control box out from the chassis careful ly 3 To remove the Discharge Grille Unhook the discharge grille and pull the dis charge grille out from the chassis carefully 4 To remove the Evaporator Remove 3 screws securing the evaporator at the left 2EA in the Eva Holder at the right 1EA ...

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: ...26H R25H E3 1K E2 1K 10K R05H 6 2K R04H Q01C KTC3198 Y 2SC5343 OSC01B CRTL8 00MSOT R02A 20K CSTS0800MG03 T2 5V C01A 50V 0 01 R01B 1M 5V 2 1 3 3 6V 5V KIA7036P IC01A 12V KID65004AF H S1 IC02M 16 UPD780023AGC C NEC 1 INT1 BZ FREQ 11 6 12 13 15 14 3 4 5 2 9 10 8 7 PK 2 STEPPING MOTOR LEFT RIGHT 2 BL CN L R BL 5 1 3 4 TXD OUT RXD OUT RD 5 OR 1 3 YL 4 KRA107S CN VFD WH Q02E Q03E KRC107S R01E 100 12V KR...

Page 40: ... FAN 4WAY HEATER RY 4WAY G5N 1A RY HEATER RY FAN G5N 1A COIL2 LS404060 CN 4WAY CN FAN 3 4 3 4 1 1 3 1 3 1 GMS81C1408SK HYUNDDAI 8K TMR20V RB7 SRDYIN SRDYOUT RC3 AN0 Aref RB0 PWM0 COMP0 RB4 PWM1 COMP1 RB5 R97 1K RY HEATER RY COMP RY FAN R96 620 RY 4WAY 10 6 100V 102J C72 R73 13K 1 1 6 04K 22 51 1K 2 4 5 L61 L62 FMX12S L63 L64 D62 11 ST1 2 100Uf R72 11K 1 C71 25V 10 2K 1 LED92 7 21 5K 39 2K 35 7K 11...

Page 41: ...Service Manual 41 Wiring Diagram Schematic Diagram Indoor Unit Outdoor Unit ...

Page 42: ...Schematic Diagram Components Location MAIN P W B ASSEMBLY Indoor PWB ASSY SVC PART LIST 1 14K Cooling Model 6871A20535A 12K 5 1K 200K OPEN OPEN OPEN NO MODEL P No OPTIONAL FUNCTION OR1H OR2H OR3H OR4H OR5H OR6H OJ1H OJ2H OPEN ...

Page 43: ...W B ASSEMBLY Outdoor PWB ASSY SVC PART LIST 1 14K Cooling Model 6871A10036N 10K 32K 20K 20K 13K X X X X X X NO MODEL P No OPTIONAL FUNCTION OR4H OR5H OR6H OR7H OR 8H FUSE RY HEATER RY 4WAY RY FAN CN 4WAY CN FAN CN TH 125V 3 15A ...

Page 44: ...44 Room Air Conditioner Schematic Diagram DISPLAY ASSEMBLY 6871A20462 TOP VIEW BOTTOM VIEW SUB P W B ASSEMBLY K ...

Page 45: ... TRANS CN POWER CN TRANS CN DC DC RY COMP BK BL BK BR RD BK BL BL BK BR RD 1 3 2 3 4 3 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 34 1 5 0 0 5 0 12 17 0 34 1 0 12 17 0 34 1 Hi 30 4 5 0 0 5 0 12 17 0 30 4 0 12 17 0 30 4 Med 24 1 5 0 0 5 0 12 17 0 24 1 0 12 17 0 24 1 Low 20 0 5 0 0 5 0 12 17 0 20 0 0 12 17 0 20 0 Off 0 0 5 0 5 0 0 12 1...

Page 46: ...HANGE 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 47: ...ise 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 Flare...

Page 48: ... 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 49: ...rge 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 su...

Page 50: ...ward 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 L...

Page 51: ... 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 ope...

Page 52: ...ir humidity When the room air humidity is relativery higher temperature difference is smaller When the room air humidity is relatively lower tem perature 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 ...

Page 53: ...CN POWER Connector related to CN FAN Connector contacting of Outdoor Fan Compressor Display PWB Ass y Check Connector related to CN DC DC Check each load Indoor Outdoor Fan Motor Compressor Stepping Motor and contacting condition of related connector including connecting cable of Indoor Outdoor Unit PCB Board Operation Check Items Power Transformer Outdoor unit Input Voltage Output Voltage IC2 Out...

Page 54: ...ctor 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 DISP1 DC 5V When the detect switch double key inside the remote controller door is fault it is impossible to operate temperature regulat...

Page 55: ...related 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 25 C When the temperature around Outdoor PWB Ass y is above 163 F the compressor 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 56: ...tions 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 51 Check the motor of Indoor Fan Indoor Fan may be s...

Page 57: ...k the soldering condition on PWB of CN U D CN L R Connector Check the operating circuit of the Vertical Louver Confirm that there is DC 12V between pin of CN U D CN L R and GND Confirm that there is a soldering short at following terminals Between 10 11 12 and 13 of ICØ1M Between 13 14 15 and 18 of ICØ2M Between 54 60 and 61 of MICOM Between 1 2 3 4 and 5 of CN U D CN L R If there are no problems ...

Page 58: ... of CN SUB Connector Check the soldering condition on PWB of CN SUB Connector Check the operating circuit of the Vertical Louver Confirm that there is DC 12V between pin of CN SUB and GND Confirm that there is a soldering short at following terminals Between 45 40 48 and 53 of MICOM Between 1 2 3 and 4 of CN SUB If there are no problems after above checks Confirm the assembly conditions that are c...

Page 59: ...ting with the remote controller then taking above 2 minutes Apply the power again after about 10 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 unit a...

Page 60: ...tor 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 Left Right vane does not operate The Left Right vane does not smoothly operate The operation indicator blinks once The compressor and the ...

Page 61: ... 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 ...

Page 62: ...Replacement Parts List Exploded View Replacement Parts List 352150 354212 159901 249951 733010 346810 131410 146811 135311 135080 268712 668713 135314 342800 267110 359011 146811 668713 135312 146811 145200 152302 135516 35211B Indoor Unit ...

Page 63: ...LTER MECH A C 5230A20022A R 159901 VANE HORIZONTAL 5990A20015B R 249951 CONTROL BOX ASSEMBLY 4995A10138A R 268712 DISPLAY LED ASSEMBLY 6302A90003A R 263230 THERMISTOR ASSEMBLY 6323A20004H R 264110 POWER CORD ASSEMBLY 6411A20026J R 266090 H V ASSEMBLY 6609A10005A R 267110 REMOTE CONTROLLER ASSEMBLY 6711A20083Q R 268714 PWB PCB ASSEMBLY MAIN 6871A20522A R 342800 BEARING 4280A20004A R 346810 MOTOR AS...

Page 64: ...ner Exploded View Replacement Parts List Outdoor unit 554031 437212 435511 W0CZZ 552202 567502 552116 552102 1 552201 554160 561410 552111 550140 552203 1 552203 2 430410 447910 649950 552102 2 437210 559010 546810 435301 ...

Page 65: ...2 TUBE CAPILLARY BENT 5210A21147B R 552111 TUBE ASSEMBLY CAPILLARY 5211A21143H R 552116 TUBE ASSEMBLY REVERSING R 552201 VALVE CHECK R 552202 VALVE REVERSING R 552203 1 VALVE SERVICE 5220A20005B R 552203 2 VALVE SERVICE 5220A20003B R 554031 CONDENSER ASSEMBLY BENT 5403A20026K R 554160 COMPRESSOR 2520UKJC2AA R 559010 FAN ASSEMBLY PROPELLER 5901A10004A R W0CZZ CAPACITOR DRAWING 0CZZA20001L R 435301 ...

Page 66: ...P No 3828A20195N March 2004 Printed in Korea ...

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LG LA140CE, Service Manual

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