LG LT-D3680CL Service Manual Download | Manualshive

Page: 41 / 55

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Possible Trouble 2

: The indoor fan does not operate.

–41–

NO

NO

Is it the HOT

START mode?

Is IC01M operated

normally?

Check the fan motor
and connector.(CN-MOTOR)

YES

Is the each Relay

any problem?

YES

NO

YES

It is normal operation.

Exchange IC01M.

Exchange Relay.

YES

YES

NO

YES

Is it Heating Mode?

Does the temperature

set all right?

Change IC01M.

NO

NO

Adjust operation mode.

Adjust set temperature.

Is IC01M operated

normally?

YES

Check the connector.
(CN-OUT)

Check RY-4Way.

NO

Is 4way-valve operated?

Possible Trouble 3

: Ineffective Heating

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Summary of Contents for LT-D3680CL

Page 1: ...Ceiling Cassette Air Conditioner SERVICE MANUAL MODELS LT D3680CL LT D3680HL LT D3682HL LT D4820CL LT D4820HL LT D4880CL LT D4880HL LT D4822HL Библиотека СОК ...

Page 2: ...ation Cycle Diagram 10 Wiring Diagram 12 Operation Details 15 Installation of Indoor Outdoor Unit 18 3 way Valve 34 Cycle Troubleshooting Guide 39 Electronic Parts Troubleshooting Guide 40 Electronic Control Device 43 Schematic Diagram 44 Exploded View and Replacement Parts List 45 2 ...

Page 3: ...of up to 700mm is possible High Ceilingcorresponding Function According to the height of ceiling the RPM of indoor fan motor is selectable to increase air reaching distance Central Control Optional It is operating individually or totally by central control function Group Control Optional Wiring Each controller can control 16 units and 8 controllers can connect It operates maximum 16 units by only ...

Page 4: ...Cooling model only Heating model only Low Med High Cooling Operation Mode Heating Operation Mode Auto Operation Mode Soft Dry Operation Mode Fan Operation Mode HI JET AUTO MED LO Program Holiday SET CLR Min Hour Week Timer Cancel Timer Cancel High 39 C LOW 11 C Fan Operates without cooling heating Cooling Heating Down to 18 C Up to 30 C Down to 16 C Up to 30 C ...

Page 5: ... 18 5 0 75 16 4 1 25 16 5 1 25 16 5 1 25 3 8 9 52 3 8 9 52 3 8 9 52 3 8 9 52 3 8 9 52 3 8 9 52 5 8 15 88 5 8 15 88 5 8 15 88 3 4 19 05 3 4 19 05 3 4 19 05 50 50 50 50 50 50 30 30 30 30 30 30 FoamPE 5mm FoamPE 5mm FoamPE 5mm FoamPE 5mm FoamPE 5mm FoamPE 5mm Ø25 32 Ø25 32 Ø25 32 Ø25 32 Ø25 32 Ø25 32 LT D3680CL LT D3680HL LT D3682HL LT D4880CL LT D4880HL LT D4882HL Power Supply ø V Hz Capacity Coolin...

Page 6: ...h weekly Program Plasma A Cleaner Refrigerant R 22 Charge g Dimensions Indoor mm W x D x H Panel mm Outdoor mm Net Weight Indoor kg Outdoor kg Main Power Cord AWG P mm2 Connection Cable AWG P mm2 Service Valve Liquid inch Gas inch Installation Pipe Length m Elevation m Insulation material thickness Drain Hose I D O D mm 1 220 60 1 220 60 12 096 14 065 12 096 14 065 48 000 48 000 12 096 14 065 48 0...

Page 7: ...Dimensions 7 290 950 950 950 950 290 210 5 180 52 140 40 110 30 90 90 110 55 840 785 840 678 1 Indoor Unit ...

Page 8: ... L9 L4 H L11 L10 L5 W D L1 L2 L3 Gas side 3 way valve Liquid side 3 way valve MODEL DIM W mm 790 H mm 965 D mm 320 L1 mm 358 L2 mm 19 L3 mm 339 L4 mm 920 L5 mm 38 L6 mm 503 L7 mm 144 L8 mm 143 L9 mm 73 L10 mm 93 L11 mm 80 36K Models ...

Page 9: ... L4 H L11 L10 L5 W D L1 L2 L3 Gas side 3 way valve Liquid side 3 way valve MODEL DIM W mm 900 H mm 1 225 D mm 370 L1 mm 460 L2 mm 45 L3 mm 410 L4 mm 1 135 L5 mm 90 L6 mm 550 L7 mm 175 L8 mm 175 L9 mm 112 L10 mm 120 L11 mm 83 48K Models ...

Page 10: ...led at a distance of 15m 450g of refrigerant should be added 15 7 5 x 60g 10 INDOOR UNIT OUTDOOR UNIT HEAT EXCHANGER HEAT EXCHANGER COMPRESSOR GAS SIDE LIQUID SIDE COOLING HEATING REVERSING VALVE CAPILLARY TUBE Capacity 36K 5 8 3 8 7 5 50 48K 3 4 3 8 7 5 50 GAS LIQUID 5 30 50 5 30 60 Elevation m Length m Additional refrigerant g m Pipe Size Diameter ø Rated Rated Max Max ...

Page 11: ... distance of 15m 450g of refrigerant should be added 15 7 5 x 60g INDOOR UNIT OUTDOOR UNIT HEAT EXCHANGER CONDENSER HEAT EXCHANGER CONDENSER COMPRESSOR GAS SIDE LIQUID SIDE CAPILLARY TUBE Capacity 36K 5 8 3 8 7 5 50 48K 3 4 3 8 7 5 50 GAS LIQUID 5 30 50 5 30 60 Elevation m Length m Additional refrigerant g m Pipe Size Rated Rated Max Max ...

Page 12: ...4 5 6 31 T B1 T B2 32 B A FMo 49FMo FMo 49FMo YL BK OR BK T3 T2 T1 RD WH CM 1 2 3 4 5 6 7 8 YL BK OR BK BK BL BL WH WH Co Co 20SV GN YL TMo To the indoor unit 1 L 2 N 3 4 5 BK WH WH YL BK RD F1 F1 OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM INDOOR MOTOR DRAIN PUMP STEP MOTOR TEMP THERMISTOR PIPE THERMISTOR REMOTE CONTROL FLOAT S W CN DISP DISPLAY PCB ONLY LT D xxx2CL AIR CLEANER H V ASSY DOOR S W...

Page 13: ...L BL BK WH T B1 F1 BK WH WH RD BK WH BK BK RD WH T1 T3 T2 CH1 Co OR YL Co OR FMo1 FMo2 CM YL YL BK BK BR BK BL BK WH GN YL TMo To the indoor unit WH 2 3 4 R S T N 20SV BK BK BK BK 1 2 3 4 5 6 OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM INDOOR MOTOR DRAIN PUMP STEP MOTOR TEMP THERMISTOR PIPE THERMISTOR REMOTE CONTROL FLOAT S W CN DISP DISPLAY PCB ONLY LT D xxx2CL AIR CLEANER H V ASSY DOOR S W TERM...

Page 14: ...BK RD Cr T2 T3 T1 WH WH WH BK BK WH WH WH BL YL BK WH BL RD GN YL To the indoor unit 52F1 BL WH PTCR GN YL GN YL Tmo 1 2 3 4 5 6 7 8 F1 T B1 T B2 RD RD 20SV BK BK BK BR OR BK D P TNS NO NC C TH WH WH OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM INDOOR MOTOR DRAIN PUMP STEP MOTOR TEMP THERMISTOR PIPE THERMISTOR REMOTE CONTROL FLOAT S W CN DISP DISPLAY PCB ONLY LT D xxx2CL AIR CLEANER H V ASSY DOOR ...

Page 15: ...and down automatically 3 Air Filter Checking Control Filter will display in the remote controller display and main body display when an air filter is polluted Then clean the air filter for reference to Owners Manual 4 Soft Dry Operation The indoor fan speed is automatically set to the low so the shift of the indoor fan speed is impossible because of already being set to the best speed for Dry Oper...

Page 16: ... when it becomes lower than 33 C the fan operates at low speed 6 Heating Mode Operation Except Cooling Model The unit will operate according to the setting by the remote controller and the operation diagram is shown as following Hot Start Low OFF Selecting Fan Speed minimum 3min Selecting fan speed minimum 10sec 1min A A minimum 1min minimum 10sec B 7 Hot Start Control The indoor fan stops until t...

Page 17: ...MPRESSOR 4 WAY VALVE INDOOR FAN 6 C ON 12 C OFF The outdoor piping Temp ON More than 10 min running of compressor More than 45 minutes of heating operation 5sec HOT START ON 9 Self Diagnosis Function CHECK will flash in the remote controller display when a problem occurs Then please contact your dealer Correct the accident point as shown in the table below before restarting operation During the no...

Page 18: ...that heat radiation from the condenser is not restricted There should not be any animals or plants which could be affected by hot air discharged Ensure the spaces indicated by arrows from the wall ceiling fence or other obstacles 3 Piping length and the elevation Indoor unit Outdoor unit B A More than 30cm Fence or obstacles More than 70cm More than 50cm More than More than 30cm More than 30cm Sun...

Page 19: ...es where inflammable gas is generated flows in is stored or vented 4 Avoid places where sulfurous acid gas or corrosive gas is generated 5 Avoid places near high frequency generators 2 Ceiling opening dimensions and hanging bolt location Ceiling board Level gauge Ceiling Use the ventilation fan for smoke collecting hood with sufficient capacity Cooking table Air conditioner Take enough distance Un...

Page 20: ...ler Installation Although the room temperature sensor is in the indoor unit the remote controller should be installed in such places away from direct sunlight and high humidity Installation of the remote controller Select places that are not splashed with water Select control position after receiving customer approval The room temperature sensor is built in the indoor unit This remote controller e...

Page 21: ...that both batteries are new Re attach the cover Slide it back into position WIRED REMOTE CONTROL INSTALLATION REMOTE CONTROL PREPARATION OPTIONAL DISASSEMBLING ELECTRICAL WIRING HOW TO MOUNT ONTO A WALL HOW TO INSERT BATTERIES Wire and make sure that teminal numbers are matched on unit side and remote controller side The maximum length of the cord is 100m If the length of the cord exceeds 50m use ...

Page 22: ... NORMAL CROSS SECTIONAL AREA 2 5mm2 36K 3 5mm2 48K 60K Terminal Block of Outdoor Unit 1 L 2 N 3 4 5 1 L 2 N 3 4 5 Terminal Block of Outdoor Unit 1 L 2 N 3 4 5 Terminal Block of Indoor Unit Terminal Block of Indoor Unit Control box cover Indoor power cord Remote controller cord Control box cover fitting screw 2 units POWER INPUT R S T N POWER INPUT R S T N 1 L 2 N 3 4 5 Terminal Block of Outdoor Un...

Page 23: ...N Main power source Switch box Refrigerant pipe Circuit Breaker Use circuit breaker or time delay fuse ELECTRICAL WIRING CONNECTING THE CABLE TO OUTDOOR UNIT 1 Remove the Cover control from the unit by loosening a screw Connect the wires to the terminals on the control board individually as following 2 Secure the cable onto the control board with the holder clamper 3 Refix the cover control to the...

Page 24: ... Putting nut on Remove flare nuts attached to indoor and outdoor units than put them on pipe tube having completed burr removal Not possible to put them on after flaring work 4 Flaring work Carry out flaring work using flaring tool as shown below Firmly hold copper tube in a bar or die as indicated dimension in the table above 5 Check Compare the flared work with figure below If flare is noted to ...

Page 25: ... there is gas leakage in indoor and outdoor connection After completing the piping connection execute vacuum drying for the connecting piping and the indoor unit The vacuum drying must be carried out using the ser vice ports of both the liquid and gas side valves Use two wrenches and tighten with regular torque Outdoor unit Liquid side Flare connection Flare connection Gas side Indoor unit Union P...

Page 26: ...en completely two temporarily fixed screws and other two screws Total 4 screws 5 Connect the louver motor connector and display connector 6 After tightening these screws install the air inlet grille including the air filter Decorative panel fixing screws hexagon M5 screws Temporally fitting at 2 places Tightening about 10mm Control box cover Piping side Inlet Grille Inlet Grille Inlet Grille Louve...

Page 27: ... to the exterior and leave it provisionally until the test comes to an end Feed water to the flexible drain hose and check the piping for leakage Be sure to check the drain pump for normal operating and noise when electrical wiring is complete When the test is complete connect the flexi ble drain hose to the drain port on the indoor unit Heat insulation material Polyethylene foam with thickness mo...

Page 28: ...ck pip ing and drain piping add further 10mm to 30mm thickness material Indoor unit Thermal insulator accessory Fastening band accessory Refrigerant piping HEAT INSULATION 1 Wrap the connecting portion of indoor unit with the Insulation material and secure it with two Plastic Bands for the right pipings If you want to connect an additional drain hose the end of the drain outlet should keep distanc...

Page 29: ...d 18 minutes later automatically The test run is started by pressing the room temperature checking button and down timer button for 3 sec onds at the same time To cancel the test run press any button After completing work be sure to measure and record trial run properties and store measured data etc Measuring items are room temperature outside temperature suction temperature blow out temperature w...

Page 30: ...aker switch between power source and the unit 3 The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which 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 give rise to burn out of the wires 4 Specification of power source 5 Confirm that elec...

Page 31: ...main body and of remote controller sensor 3 Move the slide switch to set position 4 Close the rear cover and check if it works normally TH R14H SW TH REMO MAIN 2TH OP7 R18H R17H OP6 LO STAND SW HIGH HI R03S C070 R04S R02S R01S OP3 OP2 OP1 R19H R11H R13H R12H OP5R16H OP4 R15H CO1H REMO Room Temp sensor 2TH MAIN Position 2 Position 1 Position 3 Slide switch for ceiling height Slide switch for 2Therm...

Page 32: ...red remote controller 3 Move the slide switch to the set position 4 Close the rear cover and check if it works nomally TH R14H SW TH REMO MAIN 2TH OP7 R18H R17H OP6 LO STAND SW HIGH HI R03S C070 R04S R02S R01S OP3 OP2 OP1 R19H R11H R13H R12H OP5R16H OP4 R15H CO1H Lo Hi STAND Slide switch for ceiling height Slide switch for 2Thermistor Standard Default Low ceiling High Ceiling Ceiling height Mode o...

Page 33: ...WING OPERATION FAN SPEED Program set SUB FUNCTION SET TEMP Room Temp HI MED LO Heater Defrost Filter Preheat Out door Time Timer On Set no Time Off 01 03 05 07 09 11 13 15 17 19 21 23 Indoor Unit 1 Terminal Local Supply Block Terminal Local Supply Block Terminal Local Supply Block Main PCB 1 Main PCB 2 Main PCB 16 Wired Remote Controller Slide Switch OP7 Remote Controller PCB Indoor Unit 2 Main PC...

Page 34: ... hose Open the low pressure valve on the charge set slightly to air purge from the charge hose 5 Set the liquid side valve to the closed position 6 Operate the air conditioner in cooling mode 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 indicating 3 to 5kg cm2 g 8 Disconnect the charge set and moun...

Page 35: ...lare 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 discharge the refrigerant until the gauge indicates 3 to 5 kg cm2 g 6 Disconnect the charge set and the gas cylinder and set the 2 way and 3 way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems ...

Page 36: ...scharge 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 running 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 necessary to apply a evacuatin Discharge the refrigerant gradually if it is discharged too suddenly the refrige...

Page 37: ...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 2 Way valve Outdoor unit Liquid side Indoor unit ...

Page 38: ... 150g each time while operating the air conditioner in the cooling cycle however one time is not sufficient 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 discharged If the system has been charged with liquid refrigerant while operating the air conditio...

Page 39: ...room air 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 Notice 1 The suction pressure is usually 4 5 6 0 kg cm2 G at normal condition 2 The temperature can be measured by attaching the thermometer to the low pressure tub...

Page 40: ...YES Is the input voltage of transformer AC230V Check the FUSE and the wiring diagram Is the PIN 49 58 of MICOM DC5V Exchange MICOM YES NO Check the main P C B pattern NO YES Is the output voltage of IC03D DC5V NO Exchange IC03D Is the input voltage of IC03D about DC12V Check the 5V P C B pattern ...

Page 41: ...s the each Relay any problem YES NO YES It is normal operation Exchange IC01M Exchange Relay YES YES NO YES Is it Heating Mode Does the temperature set all right Change IC01M NO NO Adjust operation mode Adjust set temperature Is IC01M operated normally YES Check the connector CN OUT Check RY 4Way NO Is 4way valve operated Possible Trouble 3 Ineffective Heating ...

Page 42: ...d normally Check the motor and connector CN LOUVER Exchange IC01M NO YES YES YES Is the LCD operated normally Is the terminal of wired Remocon T2 DC12V Is the pin 39 40 of Micom DC 5V Change the wired Remocon Check the wired Remocon PCB and DC 12V pattern NO NO Check the parts of communication Connector CN Remo and terminals of wired Remocon exactly ...

Page 43: ... 43 Electronic Control Device MAIN P C B ASM ...

Page 44: ...2D TLP521 C05D 681 5V DISPLAY TFMS 2380B PRE AMP LED2 LED3 LED4 Vout GND Vcc LED1 7 7 4 5 6 4 5 6 1 1 2 3 2 3 5V 29 32 30 31 REMO 26 27 28 24 25 21 22 23 20 19 3 7 8 NF01M 5V ZNR01M NF01M SSR 8 KID65004AF IC01M DC 12V 50 60Hz REMO 13 18 17 16 14 15 11 12 10 9 DC 12V STEP M STEP M STEP M DC 12V KID65004AF IC02M 5 7 6 4 3 103 2 1 1M 1 2W 275V C02J 100nF 3 1 3 1 2 2 M_RTX AC_L 275V C01J 100nF 3 4 NF ...

Page 45: ...Exploded View and Replacement Parts List 1 Indoor Unit 45 266090 130411 354212 158591 330870 263230 352118 266012 552111 159830 249951 268714 ...

Page 46: ... 46 130411 346810 152312 135313 135802 352150 1 359011 130911 1 130911 2 352150 2 140570 W0CZZ 146811 135312 1 267110 1 267110 2 268712 ...

Page 47: ...KER 4056A20001B 4056A20001B 4056A20001B R 130911 1 CABINET ASSY INDOOR 3091A10031A 3091A10031A 3091A10031A R 130911 2 CABINET ASSY INDOOR 3090A10030A B 3090A10030A B 3090A10030A B R 352150 2 DRAIN ASSY TUBE 5251A20002A 5251A20002A 5251A20002A R 135312 1 PANEL ASSY FRONT INDOOR 3721A10025C 3721A10025A 3721A20025B R 135313 GRILLE INLET 3530A10062A 3530A10062A 3530A10062A R 146811 MOTOR ASSY STEP 468...

Page 48: ...KER 4056A20001B 4056A20001B 4056A20001B R 130911 1 CABINET ASSY INDOOR 3091A10031A 3091A10031A 3091A10031A R 130911 2 CABINET ASSY INDOOR 3090A10030A B 3090A10030A B 3090A10030A B R 352150 2 DRAIN ASSY TUBE 5251A20002A 5251A20002A 5251A20002A R 135312 1 PANEL ASSY FRONT INDOOR 3721A10025C 3721A10025A 3721A20025B R 135313 GRILLE INLET 3530A10062A 3530A10062A 3530A10062A R 146811 MOTOR ASSY STEP 468...

Page 49: ...6H R 359011 FAN TURBO 5900A10003A 5900A10003A R 140570 LOCKER 4056A20001B 4056A20001B R 130911 1 CABINET ASSY INDOOR 3091A10031A 3091A10031A R 130911 2 CABINET ASSY INDOOR 3090A10030A B 3090A10030A B R 352150 2 DRAIN ASSY TUBE 5251A20002A 5251A20002A R 135312 1 PANEL ASSY FRONT INDOOR 3721A10025A 3721A20025B R 135313 GRILLE INLET 3530A10062A 3530A10062A R 146811 MOTOR ASSY STEP 4681AP2968D 4681AP2...

Page 50: ... 2 Outdoor Unit Model LT D3680HL LT D3682HL LT D3680CL 435512 549610 137213 430410 435511 666000 546810 559010 559010 437210 554031 649950 554160 552202 561410 268711 669200 552203 1 56600 552203 2 135301 ...

Page 51: ...71A20015N R WC0ZZ CAPACITOR 3A02157A 3A02157A 3A02157A R 666000 MAGNETIC CONTECT 2A01031A 2A01031A 2A01031A R 669200 RELAY POWER 3A00261C 3A00261C 3A00261C R 549610 MOUNT MOTOR 1A00187A 1A00187A 1A00187A R 546810 MOTOR ASSY OUTDOOR 2H00430X 2H00430X 2H00430X R 559010 PROPELLER FAN 1H00156B 1H00156B 1H00156B R 437210 PANEL ASSY FRONT 3A00426X 3A00426X 3A00426X R 135301 GRILLE ASSY DISCHARGE 2A00144...

Page 52: ... LT D4880CL LT D4880HL LT D4882HL LT D4820CL LT D4820HL 52 435512 546810 649950 430410 437212 268711 552203 1 548490 552203 2 135301 559010 137212 566000 552202 669200 554031 554031 666000 W0CZZ 561410 435511 437210 554160 ...

Page 53: ...03 1 VALVE SERVICE 2A00499A 2A00499A 2A00499A R 552203 2 VALVE SERVICE 3A00393Q 3A00393Q 3A00393Q R 554031 CONDENSER ASSY BENDING 5403AP2378D F 5403AP2378D F 5403AP2378D F R 554160 COMPRESSOR 5417A30002A 5417A30002A 5417A30002A R 559010 FAN ASSY PROPELLER 1A00195B 1A00195B 1A00195B R 561410 COIL ASSY REVERSING VALVE 3A02028B 3A02028B R 649950 CONTROL BOX ASSY OUTDOOR 6615AP2772Y 6615AP2772Y 6615AP...

Page 54: ... VALVE SERVICE 2A00499A 2A00499A R 552203 2 VALVE SERVICE 3A00393Q 3A00393Q R 554031 CONDENSER ASSY BENDING 5403AP2378D F 5403AP2378D F R 554160 COMPRESSOR 5417A20008L 5417A20008L R 559010 FAN ASSY PROPELLER 1A00195B 1A00195B R 561410 COIL ASSY REVERSING VALVE 3A02028B R 649950 CONTROL BOX ASSY OUTDOOR 6615AP2772H 6615AP2772K R 669200 RELAY 6920AQ9033A 6920AQ9033A R W0CZZ CAPACITOR DRAWING 2A00986...

Page 55: ...P No 3828A30023K December 2000 Printed in Korea P No 3828A20048H March 2001 Printed in Korea ...

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