LG LBNH608RSS1 Service Manual Download

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Ceiling Duct Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LBNS3061BL

LBUS3061BL

LBNS3062BL

LBUS3062BL

LBNK3660BL

LBUK3660BL

LBNK3661BL

LBUK3662BL

LBNK4261BL

LBUK4882BL

LBNK4881BL

LBUM7280BL

LBNK4882BL

LBUM9080BL

LBNH608RSS1

LBUM1081BL

LBNM7280BL

LBNM7281BL

LBNM9080BL

LBNM9081BL

LBNM1081BL

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.

Internal Use Only

http://biz.lgservice.com

Summary of Contents for LBNH608RSS1

Page 1: ...LBNK3661BL LBUK3662BL LBNK4261BL LBUK4882BL LBNK4881BL LBUM7280BL LBNK4882BL LBUM9080BL LBNH608RSS1 LBUM1081BL LBNM7280BL LBNM7281BL LBNM9080BL LBNM9081BL LBNM1081BL CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Internal Use Only http biz lgservice com ...

Page 2: ...Diagram 12 Operation Details 19 Installation of Indoor Outdoor Unit 22 Cycle 36 Cycle Troubleshooting Guide 39 Electronic Parts Troubleshooting Guide 40 Electronic Control Device 43 Exploded View 44 2 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 3: ...vidually or totally by central control function Group Control Optional Wiring Radio Frequency Control Optional Each controller can control 16 units and 8 controllers can connect It operates maximum 16 units by only one wired remote con troller and each unit starts random to prevent overcurrent Room temperature sensor Thermistor Maintains the room temperature in accordance with the Setting Temp Ind...

Page 4: ...y Program 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 Fan Auto Function HI MED LO Program Holiday SET CLR Min Hour Week Timer Cancel Timer Cancel Used to control the indoor air flow when the comp is off Fan operates without cooling heating AUTO High 39 C LOW 11 C Cooling Heating Down...

Page 5: ... 240 50 1 220 240 50 3 380 415 50 7 307 2 900 9 072 36 000 10 584 42 000 12 096 48 000 8 500 10 551 12 309 14 067 3 200 3 600 5 100 4 900 8 064 32 000 9 072 36 000 11 314 45 500 12 096 48 000 9 378 10 551 13 190 14 067 3 000 3 400 4 700 4 400 14 16 22 5 8 13 5 14 21 7 3 30 26 22 35 32 28 46 38 32 49 47 44 30 26 22 35 32 28 46 38 32 49 47 44 2 020 2 240 3 600 3 351 22 6 22 6 22 6 22 6 3 3 5 3 5 5 3...

Page 6: ... 380 415 50 7 060 28 000 9 072 36 000 10 584 42 000 11 843 47 000 8 206 10 551 12 309 13 774 3 300 3 600 5 100 5 100 7 182 28 500 9 072 36 000 11 314 45 500 12 096 48 000 8 353 10 551 13 190 14 067 2 700 3 400 4 700 4 300 15 16 22 5 19 12 5 14 21 17 32 28 23 35 32 28 46 38 32 49 47 44 2 020 2 240 3 600 3 351 22 6 22 6 22 6 22 6 3 3 5 3 5 5 3 8 5 4 3 5 5 1 25 5 1 25 5 1 25 5 1 25 L C D Wired L C D ...

Page 7: ...s Yes Optional Optional Optional Optional Yes Yes Yes Yes Yes Yes Yes Yes Optional Optional Optional Optional Yes Yes Yes Yes Yes Yes Yes Yes 3 8 9 52 1 2 12 7 5 8 15 88 5 8 15 88 3 4 19 05 1 25 4 9 8 28 0 9 8 28 0 1 230 400 590 1 420 400 575 1 596 450 658 1 596 450 658 900 1 220 370 1 245 930 650 1 245 930 650 1 245 930 650 60 58 84 88 103 185 190 195 Power Source Ø V Hz Cooling Capacity kcal h B...

Page 8: ...560 560 580 253 282 282 282 305 482 712 712 712 712 282 282 282 282 327 718 868 868 868 935 168 366 131 131 171 234 234 250 250 234 210 210 239 170 170 170 170 183 163 165 161 161 165 798 934 934 934 1014 798 937 937 937 1014 548 548 548 567 40 40 40 40 67 120 120 120 120 130 22 22 22 22 22 79 79 79 79 84 822 972 972 972 1052 514 514 514 514 533 A B C D E F G J K L M N P Q R S T V W X Y MODEL NO L...

Page 9: ...Inc All right reserved Only for training and service purposes LGE Internal Use Only A B C D E F G J K L M N P Q R S T V W X Y MODEL NO LBNH608RSS1 1358 400 652 294 1004 303 1093 215 276 242 172 177 1270 1281 1475 31 105 26 221 1230 590 ...

Page 10: ...ly 2 Outdoor Unit Type A Type B Type C b a c b a c c b a Model No a b c TYPE LBUS3061BL LBUS3062BL 870 320 800 A LBUK3660BL 870 320 800 A LBUK4260BL 900 370 1220 B LBUK4880BL LBUK4882BL 900 370 1220 B LBUH608RSS1 900 370 1220 B LBUM7280BL 1 245 650 930 C LBUM9080BL 1 245 650 930 C LBUM1081BL 1 245 650 930 C Unit mm ...

Page 11: ...7 5 x 70g 525g 30k Btu h 5 8 3 8 7 5 30 5 15 70 36k Btu h 5 8 3 8 7 5 30 5 15 50 42k Btu h 3 4 3 8 7 5 30 5 15 70 48k Btu h 3 4 3 8 7 5 30 5 15 70 60k Btu h 3 4 3 8 7 5 30 5 15 70 72k Btu h 1 1 2 7 5 25 5 20 70 90k Btu h 9 8 5 8 7 5 30 5 20 90 100k Btu h 9 8 5 8 7 5 30 5 20 100 Capacity Gas Liquid Elevation B m Piping Length A m Additional Refrigerant g m Pipe Size Diam eter Ø inch Standard Standa...

Page 12: ...m L1 L2 T1 T2 A2 A1 BK WH BK 52F1 1 2 3 4 5 6 WH TIMER BK WH YL YL BL BL WH F1 BK WH WH WH C TH 20SV 52S 52C Tmo TM 52F1 Cr CM Co FMo F1 D P CH1 Cs THERMISTOR FOR PIPE TEMP REVERSING COIL MAGNECTIC CONTACTOR TERMINAL BLOCK MAIN TERMINAL BLOCK RELAY FOR FMo RUN CAPACITOR FOR CM COMPRESSOR RUN CAPACITOR FOR FMo OUTDOOR FAN MOTOR FUSE 250V 5A DEICER PCB CRANK CASE HEATER FOR CM START CAPACITOR FOR CM...

Page 13: ...OR FMo OUTDOOR FAN MOTOR FUSE 250V 5A DEICER PCB CRANK CASE HEATER FOR CM START CAPACITOR FOR CM P NO 3854A20026W 20SV WH BK RD BL BK BK WH BK BK WIRING OF FIELD CONNECTING WIRE GN YL Tmo To the indoor unit WH GN YL 2 3 L N 1 2 3 4 5 6 BK BK BK BK YL BK YL YL BK RD WH RD RD OR R C S CM Cr Cs FMo BK BK BK BK WH 52S REACTOR A2 A1 T3 L3 T2 L2 NOTE BL BLUE BK BLACK BR BROWN RD RED WH WHITE YL YELLOW O...

Page 14: ...52F1 S S Cr Tm Tmo 3 P D T D 2 N C COMP 49C R S C POWER SUPPLY 1Ø 230V 50Hz FMo 49FMo FMo 49FMo 20SV 20SV NOTE TO INDOOR UNIT C H F Cs A Cr A Cr B T D Tmo F2 BK BL BK NC NO C TH BK RD RD BK WH WH BK BL BLUE BK BLACK BR BROWN OR ORANGE RD RED WH WHITE YL YELLOW GN YL GREEN YELLOW BR BR BL BL BR RD BK BL BK OR BK OR YL BK BK BK BK BK 1 L 2 N 3 4 5 OR OR YL YL YL RD RD BK C H F WH BK BK BK WH WH WH W...

Page 15: ... WH WHITE YL YELLOW Outdoor Unit Wiring Diagram R TM 3Ø 380 415V 50Hz POWER SUPPLY S T N BK BK BK BK RD WH WH RD OR BK 63H2 3 D P WH WH YL D P C TH TNS NO NC WH OR BK 52F1 52C 1 2 3 4 5 6 31 T B1 T B2 T B3 32 B A FMo 49FMo FMo 49FMo YL BK OR BK RD WH CM 1 2 3 4 5 6 7 8 YL BK OR BK BK BL BL BL BL WH WH Co Co 20SV GN YL TMo To the indoor unit 1 2 3 4 5 6 BK WH WH YL RD F1 BK 63H2 C TH 49FMo 20SV CM ...

Page 17: ...FOR FMo MAIN TERMINAL BLOCK TERMINAL BLOCK FOR CONNECTING RUN CAPACITOR FOR FMo DEICER PCB THETMISTOR FOR PIPETEMP OUTDOOR 4 WAY VALVE COIL FUSE 250V 10A INTERNAL O L P FOR COMP OUTDOOR FAN MOTOR INTERNAL T P FOR FMo RD RED WH WHITE YL YELLOW GN YL GREEN YELLOW 20SV NOTE YL BR OR BK YL BR OR BK YL BR OR BK YL BR OR BK RD 1 3 5 21 2 4 6 22 A1 A2 RD BK WH GN YL F3 Tm Co FMo 49FMo FMo 49FMo COMP 49C ...

Page 18: ...0V 10A INTERNAL O L P FOR COMP OUTDOOR FAN MOTOR INTERNAL T P FOR FMo 52C 52F1 TM TMo MAGNETIC CONTACTOR RELAY FOR FMo MAIN TERMINAL BLOCK TERMINAL BLOCK FOR CONNECTING 63H1 63H2 3 P D T D HIGH PRESSURE SWITCH HIGH PRESSURE SWITCH FOR HEATING 3 PHASE DETECTOR 5 SEC DELAY TIMER Co D P C TH 20SV RUN CAPACITOR FOR FMo DEICER PCB THERMISTOR FOR PIPE TEMP OUTDOOR REVERSING COIL FMo 49FMo A COMP 49C B C...

Page 19: ...hile compress is off While compressor is running it takes 3 5 seconds to switch 2 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 Operation by Micom Control 3 Cooling Mode Operation When selecting the Cooling Mode Operation the unit will operate according to the setting...

Page 20: ...emperature is higher than 42 C fan operates at seleted fan speed when it becomes lower than 39 C the fan operates at low speed 4 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 Selecting Fan Speed minimum 3min Selecting fan speed minimum 10sec 1min A A minimum 10sec B 5...

Page 21: ... 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 normal operation CHECK won t be displayed in the remote controller Remote controller LCD Accident Point CH 01 Indoor room temperature thermistor error CH 02 Indoor piping thermi...

Page 22: ...any heat source or steam near the unit 2 Outdoor unit If an awning is built over the unit to prevent direct sunlight or rain exposure be careful 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 e...

Page 23: ...d steel strap NOTE Throughly study the following installation locations 1 In such places as restaurants and kitchens considerable amount of oil steam and flour adhere to the fan the fin of the heat exchanger resulting in heat exchange reduction spraying dis persing of water drops etc In these cases take the following actions Make sure that the ventilation fan for smoke collecting hood on a cooking...

Page 24: ...erant piping and the drain piping To protect the remote controller cord from electrical noise place the cord at least 5cm away from other power cables audio equipment television set etc If the remote controller cord is secured to the wall provide a trap at the top of the cord to prevent water droplets from running Remote control box body Cord clamp accessory Lever carefully the box open using a sc...

Page 25: ...t the and directions are correct Be sure that both batteries are new Re attach the cover Slide it back into position Do not use rechargeable batteries such batteries differ from standard dry cells in shape dimensions and performance Romove the batteries from the remote controller if the air condi tioner is not going to be used for some long time REMOTE CONTROL PREPARATION OPTIONAL HOW TO MOUNT ONT...

Page 26: ...ailible from the manufacturer of its service agent The connecting cable connected to the indoor and outdoor unit should be complied with the following specifications Rubber insulation type H05RN F approved by HAR or SAA CAUTION 20mm GN YL NORMAL CROSS SECTIONAL AREA 1 25mm2 20mm GN YL NORMAL CROSS SECTIONAL AREA Capacity 36K BTU h 30K BTU h 42K BTU h 48K BTU h 72K BTU h 60K BTU h 1 Phase 5 5mm 3 5...

Page 27: ... a power source that is capable of supply ing the current required by the air conditioner Use a recognized circuit breaker between the power source and the unit A disconnection device to adequately disconnect all supply lines must be fitted Capacity of circuit breaker INDOOR UNIT Remove the control box cover for elec trical connection between the indoor and outdoor unit Use the cord clamper to fix...

Page 28: ...ring 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 be defective cut off the flared section and do flaring work again Copper tube 90 Slanted Uneven Rough Pipe Reamer Point down Flare nut Copper tube Bar Copper pipe Clamp handle Red ...

Page 29: ...g the piping connection be sure to check if 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 Fl...

Page 30: ...00mm HP CP model only Front of view Always lay the drain with downward inclination 1 50 to 1 100 Prevent any upward flow or reverse flow in any part 5mm or thicker formed thermal insulator shall always be provided for the drain pipe 1 Install declination of the indoor unit is very important for the drain of the duct type air conditioner 2 Minimum thickness of the insulation for the connecting pipe...

Page 31: ...late and tape both the gas piping and liquid piping THERMAL INSULATION 5 7mm Indoor Outdoor WALL Make sure that there is no clearance here Overlap with thermal insulator for piping Thermal insulator for refrigerant pipe Local supply Thermal insulator for piping Local supply Hose crip for thermal insulator Local supply Union for liquid pipe Orifice Refrigerant pipe and thermal insulator Local suppl...

Page 32: ...ically 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 wind velocity wind volume v...

Page 33: ...ical capacity is sufficient 6 Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 7 Confirm that the cable thickness is as specified in the power sources specification Particularly note the relation between cable length and thickness 8 Never fail to equip a leakage breaker where it is wet or moist 9 The following troubles would be c...

Page 34: ...emperature is controlled by lower temperature between the temperature of 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 Posi...

Page 35: ... 4 Humidify JET AUTO AUTO SWING 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 Controlle...

Page 36: ...for leakage On checking the service valve of main service port must be closed this test is only for checking whether pipe connection is ok or not 5 If there is no leakage discharge R22 in piping com pletely into tank for retrieving Complete discharge is needed for vacuuming If leakage is found please fasten the joint more tight ly 6 After closing the valve of charging hose discon nect the tank and...

Page 37: ...such as retrieving tank opening the valve of charg ing hose gas side slightly and then close it tightly 3 Operate the air conditioner for 10 15 min until cycle is stabilized 4 Close the spindle of service port liquid side high pressure and wait till pressure of gas side low pressure drops below 0kgf cm2 5 After the needle of gage indicates below 0 kgf cm2 close the valve of gas side quickly and tu...

Page 38: ... of refrigerant it can be charged with a little 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 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 ...

Page 39: ...ture difference between intake and discharge air depends on room air 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 Notice 1 The suction pressure is usually 4 5 6 0 kg cm2 G at normal condition 2 The temperature can be ...

Page 40: ...uide The unit does not operate Possible Trouble 1 YES NO 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 AC12V Check the 5V P C B pattern ...

Page 41: ...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 ...

Page 42: ...ble 4 Wired remote controller does not operate 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 44: ...raining and service purposes LGE Internal Use Only Exploded View and Replacement Parts List 1 Indoor Unit Model LBNS3061BL 237203 330870 W3001A 137211A 237204D 268714 249941B 249941A 237201 237204B 137211B 237200 237204A 267110A 354212 237204C W3300 359012 W6640 346810 ...

Page 45: ...eserved Only for training and service purposes LGE Internal Use Only Model LBNS3062BL LBNK3661BL 237203 330870 W3001A 137211A 137211B 237204D 268714 249941B 249941A 237201 237204A 237204B W3001B 237200 267110A 354212 237204C W3300 359012 W6640 346810 ...

Page 46: ... 46 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 237203 330870 W3001 137211A 137211B 237204D 268714 249941B 249941A 237204A 237201 237200 267110 354212 359012 W6640 W3300 237204B 346810 ...

Page 47: ... service purposes LGE Internal Use Only Model LBNK4260BL LBNK4880BL LBNM7280BL LBNK4261BL LBNK4881BL LBNM7281BL LBNK4882BL 237203 330870 W3001A 137211 237204D 268714 249941A 237201 237204A 237204B W3001B 237200 267110 354212 237204D W3300 249941B 359012 W6640 349781 263230 263230 ...

Page 48: ...ight reserved Only for training and service purposes LGE Internal Use Only Model LBNH608RSS1 346810 137214 147901 W3001 137213A 137213B 437213A 437213B 359012 354210 552111 352118 330870 W0CZZ 268714 249951 336610B 267110 263230B 263230A 336610A ...

Page 49: ...ved Only for training and service purposes LGE Internal Use Only Model LBNM9080BL LBNM9081BL LBNM1081BL 237203 330870 W3001A 137211 237204D 268714 249941A 237201 237204A 237204B W3001B 237200 267110 354212 237204C W3300 249941B 359012 263230 W6640 263230 ...

Page 50: ...ce purposes LGE Internal Use Only Model LBUS3061 3062BL LBUK3660BL 437210 435301 435512 546810 552201 554031 263230 349600 435511 649950 554160 552203A 552203B 437212 137213A 430411 C S R 552202 561410 137213B W0CZZB 268711 W6640B W6920 W6640A 566000 W0CZZC 559010 349480 268711B W0CZZA ...

Page 51: ...rvice purposes LGE Internal Use Only 2 Outdoor Unit Model LBUK4260BL 435512 546810 559010 430410 435301 437210 137213 435511 554160 349600 554031 649950 552201 437212 552203B 552203A W6640D 268711B 268711C W6640C W6640A W6640B W6920A W0CZZA W0CZZB W6920B 561410 552202 552115 548490 ...

Page 52: ...rposes LGE Internal Use Only 2 Outdoor Unit Model LBUK4880BL LBUK4882BL LBUH608RSS1 C S R 435512 546810 649950 566001 W6920 430410 437212 552203A 552203B 552201 552115 435301 559010 137213 566000 561410 554031A 554031B 552202 435511 437210 554160 W6640A 268711B W6640B W0CZZA 268711A 352111 ...

Page 53: ...ly 2 Outdoor Unit Model LBUM7280BL C S R 349490 549610 435301 145200 552201A 430411 W0CZZB W6640A W6640C W6640B W6920 552115D 559010 546810 552115B 552115C 552115A 552203A 437210B 552203B 566000B 552116 566000A 561410 649950 566001 263230 268711A 268711B 548490 554160 437210A 554031A 554031C 552201B 554031D 554031B ...

Page 54: ...Unit Model LBUM9080BL LBUM1081BL 349490 549610 435301 145200 430411 W0CZZ 268711B 552114 548490B W6920A W6640C 552115D 559010 546810 552115B 552115C 552115A 437210B 649950 437210A 554031A 554031C 554031D 554031B W6640A W6640B 268711A 566001 552111 552112 561410 552116 552113 554160A 552203B 548490A 55211G 552117 552203A 554160B ...

Page 55: ...P NO 3828A20097T DECEMBER 2007 ...

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