LG LM-3061B2L Service Manual Download

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PCB Board Operation Check in Outdoor

Items

• Power Transformer

(Outdoor unit)
- Input Voltage
- Output Voltage

• IC01D(7812) Output

(Indoor/Outdoor unit)

• IC02D(7805) Output

(Indoor/Outdoor unit)

• IC01A(KIA7036, Reset IC)

X01(8MHz)

• Replace Trans

• Replace IC01D

• Replace IC02D

• Replace faulty parts

- About AC220V/240V±10% - Check the power voltage
- About AC14±3V

• DC +12V

• DC +5V

Content

Remedy

7. Outdoor unit does not operate at all.

8. Communication error

• The control data can be transmitted or received between indoor and outdoor unit with one signal cable.

• If the data be disturbed by any noise level, the unit will be operated incorrectly. In this case, the indoor unit

blinks the operation and operation LED on display and indoor fan, outdoor fan, COMP are not operated.

• The unit can be reoperated by On/Off control of Remocon.

Check Outdoor Unit

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.

Summary of Contents for LM-3061B2L

Page 1: ...Multi Type Room Air Conditioner SERVICE MANUAL MODEL LM 3061H2L M LM 3061B2L LM 3061C2L M ...

Page 2: ...etails 11 Display Function 17 Self diagnosis Function 17 Installation 18 Disassembly of the parts Indoor unit 37 2 way 3 way Valve 39 Cycle Troubleshooting Guide 43 Electronic Parts Troubleshooting Guide 44 Electronic Control Device 51 Schematic Diagram 53 Exploded View and Replacement Parts List 56 2 Contents ...

Page 3: ...hours The fan is switched to intermittent or irregular operation The fan speed is automatically switched from high to low speed The louver can be set at the desired position or swing up and down automatically Indoor Unit Operation ON OFF by Remote controller Sensing the Room Temperature Room temperature control Starting Current Control Time Delay Safety Control Indoor Fan Speed Control Operation i...

Page 4: ...m Temperature Display Setting the Time or Timer Airflow Direction Control Operation ON OFF Temperature Setting TEMPERATURE LOW HIGH Timer Selection ON OFF Timer Setting SET Timer Cancel CANCEL Reset Fan Speed Selection Low Med High CHAOS High 39 C LOW 11 C Down to 18 C Up to 30 C Cooling OFF ON OFF ON Cancel Sleep Mode Timer ON or Timer OFF 1 2 3 4 5 6 7 Off Timer Fan Operates without cooling or h...

Page 5: ...320 Indoor 11 9 Outdoor 83 1 400 1 080 O L C D Wireless Liquid 1 4 6 35 Gas 1 2 12 7 O O Operation A Unit Only A Unit B Unit B Unit Only Unit Item Cooling Capacity Heating Capacity Moisture Removal ℓ h Power Source ø V Hz Air Circulation m3 min Noise Level dB A Input W A E E R Btu h w C O P Motor Output W Dimensions W x H x D mm Net Weight kg Refrigerant R 22 g Airflow Direction Control Up Down Re...

Page 6: ...0 9 0 Outdoor 67 1 400 950 O L C D Wireless Liquid 1 4 6 35 Gas 1 2 12 7 O O Operation A Unit Only A Unit B Unit B Unit Only Unit Item Cooling Capacity Btu h kcal h Moisture Removal ℓ h Power Source ø V Hz Air Circulation m3 min Noise Level dB A Input W Running Current A E E R Btu h w Motor Output W Dimensions W x H x D mm Net Weight kg Refrigerant R 22 at 7 5m g Airflow Direction Control Up Down ...

Page 7: ...1 Indoor Unit 7 Dimensions D H W Installation plate Tubing hole cover W H Tubing hole cover Tubing hole cover Installation plate D W mm 1 080 888 H mm 314 287 D mm 181 170 18k 12k MODEL DIM 18k 12k ...

Page 8: ... side 3 way valve Liquid side 2 way valve L10 L10 L10 2 Outdoor Unit W mm 870 H mm 800 D mm 320 L1 mm 370 L2 mm 25 L3 mm 775 L4 mm 25 L5 mm 546 L6 mm 160 L7 mm 160 L8 mm 64 L9 mm 76 5 L10 mm 50 LM 3061H2L M LM 3061B2L LM 3061C2L M MODEL DIM ...

Page 9: ...2 WAY Valve 3 WAY Valve Pipe Size Diameter inch Max piping length m Max piping elevation m Gas Liquid 1 2 1 4 10 15 5 7 ex Capillary Cooling Deice Heating A UNIT B UNIT CAPILLARY TUBE LIQUID SIDE 2 WAY VALVE GAS SIDE 3 WAY VALVE HEAT EXCHANGER EVAPORATOR HEAT EXCHANGER CONDENSER COMPRESSOR B COMPRESSOR A 1 LM 3061H2L M LM 3061B2L Cooling Heating Model 2 LM 3061C2L M Cooling Model ...

Page 10: ...P CAPA CAPA FUSE T3 15A THERMISTOR THERMISTOR TRANS FORMER OLP B COMP 1 L 1 L 2 N 1 L 2 N 2 N 3 3 A 4 WAY B 4 WAY OPTION 3854A20023D INDOOR WIRING DIAGRAM CN DISP1 CN U D FUSE AC250V T2A CN TH1 SSR SH CAPA BR YL OR BK CN TAB1 ZNR CN MOTOR THERMISTOR FORCED OPERATION AUTO RESTART REMOTE CONTROL STEP MOTOR MOTOR MAIN PCB ASM DISPLAY PCB ASM TO OUTDOOR UNIT PILLAR TERMINAL BR BL YL GN YL 1 L 2 N 3 RY...

Page 11: ...rature 26 C Intake Air Temp 25 C 24 C Intake Air Temp 26 C Intake Air Temp 1 C 18 C Intake Air Temp 24 C Intake Air Temp 0 5 C Intake Air Temp 18 18 C While in compressor off the indoor fan repeats low airflow speed and pause While the intake air temp is between compressor on temp and compressor off temp 10 min dehumidifica tion operation and 4 min compressor off repeat Compressor ON Temp Setting ...

Page 12: ...ooling 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 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 w...

Page 13: ...uzzy 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 Intake Air Temp...

Page 14: ...sleep timer mode is input while in heating cycle mode the airflow speed of the indoor fan is set to the medium Chaos Swing Mode By the Chaos Swing key input the upper lower vane automatically operates with the Chaos Swing or they are fixed to the desired direction While in Chaos Swing mode the angles of cooling and heating cycle operations are different Chaos Natural Wind Mode When the Chaos Natur...

Page 15: ... mode with the setting temperature 22 C and the high speed of airflow In the forced operation mode the indoor fan is operated at low speed for around 15 sec and then the opera tion condition is set according to the intake air temperature as follows 24 C Intake Air Temp Cooling Mode Operation 22 C High Speed 21 C Intake Air Temp 24 C Dehumidification Operation 23 C High Speed Intake Air Temp 21 C H...

Page 16: ... controller the long beep sounds When a key is input by the remote controller while the slide switch on the main unit of the appliance is on the forced operation position the error sound beep beep beep beep beep is made 10 times to indicate that the remote control signal cannot be received Self Diagnosis Operation Thermistor Error Indicator When the indoor pipe sensor or the room temperature senso...

Page 17: ... error code is different from Model 17 Display Function Operation Indicator Sleep Timer Indicator Sleep Timer Indicator Deice Indicator 1 once once twice twice 5times once twice 3times 3sec 3sec 3sec 3sec 3sec 3sec 3sec 3sec 3sec 3sec 3sec 2 3 5 12 Error Code Error LED Indoor body operation LED Error contents SVC check point Indoor suction temperature thermistor open short Indoor pipe temperature ...

Page 18: ...ined A place where noise prevention is taken into consideration Do not install the unit near the door way Ensure the spaces indicated by arrows from the wall ceiling fence or other obstacles 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 whic...

Page 19: ...ead and a level 2 Drill the piping hole with 70mm dia holecore drill Line according to the arrows marked on lower the left and the rght side of the Installation Plate The meeting point of the extended line is the center of the hole Drill the piping hole at either the right or the left and the hole should be slightly slant to the out door side Type A screw Installation Plate marking off line Thread...

Page 20: ... pipes Some refrgerant gas may leak when the flare nuts are removed from the indoor unit as some gas is charged to prevent the inside of the pipe from rusting Fit the copper pipe end into the Bar of flare tool about 0 0 5mm higher See illustration Flare the pipe ends 4 Tape the flaring portion to protect it from the dust or damages 90 A When properly flared the internal surface flare will evenly s...

Page 21: ...hole with 70mm dia holecore drill Line according to the arrows marked on lower the left and the rght side of the Installation Plate The meeting point of the extended line is the center of the hole Drill the piping hole at either the right or the left and the hole should be slightly slant to the out door side Installation Plate marking off line Thread Weight Type A screw ø70mm ø70mm 5 7mm A A A A ø...

Page 22: ... pipes Some refrgerant gas may leak when the flare nuts are removed from the indoor unit as some gas is charged to prevent the inside of the pipe from rusting Fit the copper pipe end into the Bar of flare tool about 0 0 5mm higher See illustration Flare the pipe ends 4 Tape the flaring portion to protect it from the dust or damages 90 Slanted Pipe cutter Rough Reamer Pipe Point down A Bar Copper p...

Page 23: ...through the piping hole Do not connect the cable to the indoor unit Make a small loop with the cable for easy con nection later 5 Tape the tubing drain hose and the connecting cable Be sure that drain hose locates at the lowest side of the bundle Locating at the upper side can be a reason that drain water overflows drain pan inside the unit Installation plate Pull Pull To remove the holder press t...

Page 24: ...y moving it in left and right 7 Connecting the pipings to the indoor unit Align the center of the pipings and sufficiently tighten the flare nut with fingers Finally tighten the flare nut with torque wrench until the wrench clicks Wrench tightening the flare nut with forque wrench ensure the direction for tightening fol lows the arrows on the wrench 8 Wrap the insulation material around the con ne...

Page 25: ...door unit onto the upper portion of installation plate Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate Ensure the hooks are properly seated on the installation plate by moving it in left and right Drain hose Tubing holder Taping Piping Push 2 Hook 1 Connecting cable Drain hose Press the lower left and right side of the unit against the Installa...

Page 26: ...phase conductors 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 electrical capacity is sufficient...

Page 27: ...on the control board individually as the following 2 Secure the cable onto the control board with the holder clamper 3 Refix the cover control to the original position with the screw 4 Use a recongnized circuit breaker between the power source and the unit A disconnection device to adequately disconnect all supply lines must be fitted Caution If a power plug is not to be used provide a circuit bre...

Page 28: ...open position horizontally by finger pressure Remove the securing screws To remove the Grille pull lower the left and right side of the grille toward you slightly tilted and lift it straight upward 2 Check the drainage Pour a glass of water on the evaporator Ensure if water flows drain hose of indoor unit without any leakage 5 Checking the Drainage and Pipe forming ...

Page 29: ...e back into place 1 L 1 L 2 N 2 N 1 L 2 N 3 3 Terminal on the OUTDOOR UNIT Terminal on the OUTDOOR UNIT Terminal on the INDOOR UNIT A UNIT Terminal on the INDOOR UNIT A UNIT Terminal on the INDOOR UNIT Power cord Power cord Power cord B UNIT Terminal on the INDOOR UNIT B UNIT Terminal on the INDOOR UNIT C UNIT 3 3 1 L 2 N 3 1 L 2 N 3 2 N 1 L 1 L 3 B 2 N 3 A 1 L 2 N 1 L 2 N Terminal on the OUTDOOR ...

Page 30: ... the ground Do not dip it into water and fix it on the wall to avoid swinging in the wind 2 Tape the Pipings drain hose and Connecting Cable from down to up 3 Form the pipings gathered by taping along the exterior wall and fix it onto the wall by saddle or equivalent 1 Tape the Pipings and Connectiong cable from down to up 2 Form the pipings gathered by taping along the exterior wall and the Trap ...

Page 31: ...port nut and connect the gauge manifold and the vacuum pump to the service port by the charge hose 4 Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below 76cmHg 5 Disconnect the charge hose and fit the nut to the service port Tightening torque 1 8kg m 6 Remove the valve stem nuts and fully open the stems of the 2 way and 3 way valves with a hexagon wrench 7 Ti...

Page 32: ...d than indoor unit Charge amount per 1m 7 Preventive function of cable mis connection Cooling Heating This product has a preventive function of cable mis connection In case of mis connection in case that the cables between indoor and outdoor units have not been connected properly it gives a warning signal of LED flickering 3 minutes after starting operation Press the forced operation key more than...

Page 33: ...mance 1 Measure the temperature of the intake and discharge air 2 Ensure the difference between the intake temperature and the discharge one is more than 8 C 1 Connection of power supply 1 Connect the power supply cord to the inde pendent power supply 2 Prepare the remote control Insert two batteries provided Remove the battery cover from the remote con troller Slide the cover according to the arr...

Page 34: ...the button is pressed again OPERATION MODE SELECTION BUTTON Used to select the operation mode ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature INDOOR FAN SPEED SELECTOR Used to select fan speed in four steps low medium high or CHAOS JET COOL Used to start or stop the speed cooling Speed cooling operates super high fan speed in cooling mode CHAOS SWING BUTTON Used to stop or sta...

Page 35: ...opping operation TIME SETTING BUTTONS Used to adjust the time TIMER SET CANCEL 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 heating turns indoor fan on off ROOM TEMPERATURE CHECKING BUTTON Used to check the room t...

Page 36: ...nd stopping operation TIME SETTING BUTTONS Used to adjust the time TIMER SET CANCEL 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 heating turns indoor fan on off ROOM TEMPERATURE CHECKING BUTTON Used to check the r...

Page 37: ...rge 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 To remove the sensor housing connect earth conductor step motor conductor with sen sor holder Motor Evaporator P C B Screw Power Conductor Step Motor Conductor Earth Conductor Motor Cond...

Page 38: ...rator and the holder eva Unhook the tab on the right inside of the chas sis at the same time slightly pull the evapora tor toward you until the tab is clear of the slot 5 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 lef...

Page 39: ...g clockwise counter clockwise connected manifold gauge Evacuation Open Open Open Servicing with charging cylinder Gas charging Open Open Open Servicing with charging cylinder Pressure check Open Open Open Servicing with charging cylinder Gas releasing Open Open Open Servicing with charging cylinder 39 2 way 3 way Valve 3 2 1 4 5 6 Flare nut To piping connection Open position Closed position Hexago...

Page 40: ...he gauge slightly to air purge from the hose 5 Set the liquid side 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 gas side valve to the closed position Do this quickly so that the gauge ends up indi cating 1kg cm2 g 8 Disconnect the charge set and mount the liquid side and gas side valve caps and ...

Page 41: ...acuum of 4 mmHg or less 5 Close the Low handle of the gauge turn off the vacuum pump and confirm that the gauge nee dle does not move approximately 5 minutes after turning off the vacuum pump 6 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or deplet ed replenish as needed 7 Mount the valve caps and the service port caps 8 Apply steps from 1 to...

Page 42: ...wait approximately 1 minute and then repeat the procedure pumping down pin 4 Immediately disconnect the charge hose from the gas side valve s service port Stopping partway will allow the gas to be dis charged If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 5 Mount the valve stem nuts and the servi...

Page 43: ... 5 6 0 kg cm2 G at normal condition 2 The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty 43 Cycle Troubleshooting Guide Temp difference approx 0 C Current less than 80 of rated current Temp difference approx 8 C Current less than 80 of rated current Temp difference less than 8 C Current over the rated current Temp difference over 8 C Temp...

Page 44: ...he connection housing for contacting Connector related to CN POWER Display PWB Ass y Check Connector related to CN TAB1 Compressor LM 2163C2L M Check each load Indoor Outdoor Fan Motor Compressor Stepping Motor etc and contacting condition of related connector PCB Board Operation Check Items Power Transformer Outdoor unit Input Voltage Output Voltage IC01D 7812 Output Indoor Outdoor unit IC02D 780...

Page 45: ...int 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 regulating and wind speed selecting Check the connecting circuit between the remote co...

Page 46: ...for indoor temperature and connector are in bad connection or are not engaged Compressor Outdoor Fan is stopped Check the related circuit of R02H 12 1K R01H 1 0K R04H 6 2K R03H 1 0K Indoor unit Check the indoor temperature sensor is disconnected or not About 10kΩ at 25 C Check Outdoor Unit Check Relay RY COMP for driving compressor When the power About AC220V 240V is applied to the connecting wire...

Page 47: ...ON Main Power Check the related circuit of indoor Fan Motor The pin of Micom and the part for driving SSR Check the pattern Check the SSR SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF 4 When indoor Fan does not operate The voltage of PIN NO 1 blue and 3 yellow of CN FAN or CN MOTOR About AC 180V over About AC 50V over SSR is not damaged SSR...

Page 48: ...ndition of CN U D Connector Check the soldering 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 5 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...

Page 49: ... Check the related circuit of R02H 12 1K R01H 1 0K R04H 6 2K R03H 1 0K Check the indoor room temperature 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 ASS Y The details of check are as followings Check point Between two pin of DC part in relay for COMP Comp ON Below DC 1V Comp ...

Page 50: ... error The control data can be transmitted or received between indoor and outdoor unit with one signal cable If the data be disturbed by any noise level the unit will be operated incorrectly In this case the indoor unit blinks the operation and operation LED on display and indoor fan outdoor fan COMP are not operated The unit can be reoperated by On Off control of Remocon Check Outdoor Unit Turn o...

Page 51: ... 51 Electronic Control Device LM 3061C2L M 1 Indoor MAIN P C B ASM LM 3061H2L M LM 3061B2L ...

Page 52: ... 52 2 Outdoor MAIN P C B ASM LM 3061H2L M LM 3061B2L 3 DISPLAY P C B ASM ...

Page 53: ... 53 Schematic Diagram 1 Indoor LM 3061H2L M LM 3061B2L ...

Page 54: ... 54 LM 3061C2L M ...

Page 55: ... 55 2 Outdoor LM 3061H2L M LM 3061B2L ...

Page 56: ... 56 Exploded View and Replacement Parts List 1 Indoor Unit 18k 733010 131410 342800 354212 135311 135312 159901 267110 135314 152302 249951 268712 268714 263230 W0CZZ 146811 352150 35211B 359011 346810 ...

Page 57: ...5990A30002B VANE HORIZONTAL R 249951 4995A20091G 4995A20091J CONTROL BOX ASSY INDOOR R 263230 6323AQ2333A THERMISTOR ASSY R 267110 6711A20028B 6711A20010A REMOTE CONTROLLER ASSY R 268712 6871A30009D PWB PCB ASSY DISPLAY R 268714 6871A20109A 6871A10001D PWB PCB ASSY MAIN R 342800 3H02821A BEARING R 346810 4681A20003D MOTOR ASSY INDOOR R 35211B 5211A30038E 5211A30038B TUBE ASSY TUBING R 352150 5251A...

Page 58: ... 58 2 Indoor Unit 12k 733010 131410 342800 135311 135312 267110 135314 152302 159901 352150 35211B 354212 346810 W0CZZ 263230 268714 249951 359011 ...

Page 59: ...HORIZONTAL R 159901 5990A30007B VANE HORIZONTAL R 249951 4995A20082U 4995A20094E CONTROL BOX ASSY INDOOR R 263230 6323AQ2333A THERMISTOR ASSY R 267110 6711A20028B 6711A20010A REMOTE CONTROLLER ASSY R 268712 6871A30009E PWB PCB ASSY DISPLAY R 268714 6871A20075Z 6871A20055S PWB PCB ASSY MAIN R 342800 3H02821B BEARING R 346810 4681A20003P MOTOR ASSY INDOOR R 35211B 2H02449J TUBE ASSY TUBING R 352150 ...

Page 60: ... 60 3 Outdoor Unit 554031 137213 567502 649950 554160 552202 550140 551410 552203 430411 447910 437210 546810 559010 435512 263230 268716 W0CZZ ...

Page 61: ... R 552111 5211A20222A 5211A30361A TUBE ASSY CAPILLARY A UNIT R 552116 5211A20211A TUBE ASSY REVERSING B UNIT R 552116 5211A20213A TUBE ASSY REVERSING A UNIT R 552202 3A02027A VALVE REVERSING R 552203 2H01890D VALVE SERVICE R 552203 2H01890Q VALVE SERVICE B UNIT R 552203 2H02479B 2H02479D VALVE SERVICE R 554031 5403A10017D 6140AP2096V 6140AP2096J CONDENSER ASSY BENT R 554160 2520UKVP2CA COMPRESSOR ...

Page 62: ... 62 Memo ...

Page 63: ...P No 3828A20023H December 2002 Printed in Korea ...

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LG LM-3061B2L, Service Manual

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