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LG LC240CP Service Manual

LG LC240CP Manual

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LG LC240CP | Service Manual - Page 1
www.lgservice.com e-mail http://www.lgeservice.com/techsup.html LG LG Ceiling Cassette Air Conditioner SERVICE MANUAL MODEL: LCN240CP/LCU240CP LC240CPI/LC240CPO LCN340CP/LCU340CP LC340CPI/LC340CPO CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED
LG LC240CP | Service Manual - Page 2
...14 7. Dimensional Drawings 16 8. Wiring Diagrams...19 9. Refrigerant Cycle Diagrams 21 10. Installation ...22 11. Trouble Shooting Guide 32 12. (3-Way)Valve ...48 13. Electronic Control Device 52 14. Exploded View and Replacement Parts List 53 2 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 3
, 60Hz ❈ Local model name Factory AT-C243HLF0 AT-C343HLF0 Local Model 1 Indoor Outdoor LCN240CP LCU240CP LCN340CP LCU340CP Local Model 2 Indoor Outdoor LC240CPI LC240CPO LC340CPI LC340CPO Service Manual 3
LG LC240CP | Service Manual - Page 4
circuit and breaker. • Improper wiring or installation may cause fire or electric shock Use the correctly rated breaker or fuse. • There is risk of fire or electric shock. Do not modify or extend the power cable. • There is risk of fire or electric shock. 4 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 5
and installing the Service Center. • There is risk of fire, electric shock, explosion, or injury. Do not install the product on a Be sure the installation area defective installation stand. does not deteriorate with age. Do not let the air conditioner heater or other appliances near the power cable
LG LC240CP | Service Manual - Page 6
Always check for gas (refrigerant) leakage after Install the drain hose to ensure that water is installation or repair of product. drained away properly. • Low refrigerant levels may cause failure of product. • A bad connection may cause water leakage. 6 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 7
level even when installing the product. product. Do not touch the metal parts of the product when removing the air filter. They are very sharp! • There is risk of personal injury insert hands or other objects through the air inlet or outlet while the product is operated. • There are sharp
LG LC240CP | Service Manual - Page 8
Refrigerant : - LG Ceiling Cassette Air Conditioners uses environment friendly refrigerant, which don't do any harm to the environment. Plasma Air For Setting Temperature, Fan Speed and other sub functions, access the respective LCD wired remote controller of each unit. Main M M M PCB 1 2 16 Sub
LG LC240CP | Service Manual - Page 9
4.8% Comparison of Air Flow Types 4- Open installation environment. - For example direct drafts can be annoying, leading to discomfort and reduced productivity vane control helps to eliminate this problem. - Easily controlled by wired remote control. - Air installed the LCD wired remote controller,
LG LC240CP | Service Manual - Page 10
of the unit. An error code will be displayed on the LCD wired remote controller & diagnosis can be done as per the code indication. The same is also printed on key cover of the LCD wired remote controller. 5~6W Others 30m 0.5W 30LmG CHILD LOCK -Display 10 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 11
: O : Applied, X : Not applied, - : No relation Option: Model name & price are different according to options, and assembled in factory with main unit. Accessory: Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package. Service Manual 11
LG LC240CP | Service Manual - Page 12
SLEEP MODE AUTO BUTTON Used to set Sleep Mode Auto operation. 11. AIR CIRCULATION BUTTON Used to circulate the room air without cooling. 12. ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature. wireless remote controller do not operate the swirl mode. 12 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 13
2. Wired LCD Remote Control Function of up and down. 8 Room Temperature Checking Button Used to check the room temperature. 9 Plasma Air Clean Button Used to start or stop the plasma-purification function. 10 Timer Cancel Button Used to current time and clear the setting time. Service Manual 13
LG LC240CP | Service Manual - Page 14
Specifications Specifications Indoor unit type Ceilling DC DC Coil Row * stages * FPI mm 2R * 9C * 18 2R * 9C * 18 Dimensions Body mm(inch) 840 * 840 * 225(331/16 * 331/16 * 87/8) 840 * 840 Thermistor Refrigerant R410A R410A Refrigerant control 14 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 15
Specifications ) Power and transmission cable No. * mm2(No. AWG) Dimensions W * H * D mm(inch) Net weight kg(lbs Oil charge volume cc Oil type Refrigerant Charge(at 7.5m(25ft)) mF/Vac Drive Discharge Direction Side / Top Air flow rate cmm(cfm) Noise level(H) Sound Service Manual 15
LG LC240CP | Service Manual - Page 16
18) 840(33.1) 6 4 5 225(8.9) 135(5.3) 76(3.0) No. Part Name 1 Decoration panel 2 Air suction grille 3 Air discharge grille 4 Gas pipe connection 5 Liquid pipe connection 6 Drain pipe connection 7 Power supply connection 7 * mm(inch) Remark 16 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 17
2. Outdoor Units Model No.: LCU240CP/LC240CPO 870(34.3) 546(21.5) 160(6.3) Dimensional Drawings 340(13.4) 360(14.2) 320(12.6) 10(0.4) 808(31.8) 782.5(30.8) 392(15.4) 333(13.1) 54.6(2.1) 320(12.6) Ø531(20.9) 80(3.1) 50(2.0) *mm(inch) 25.5(1.0) Service Manual 17
LG LC240CP | Service Manual - Page 18
273(10.7) 370(14.6) 4 1 520(20.5) 1135(44.7) 1165(45.9) 308(12.1) No. Part Name 1 Air discharge grille 2 Gas pipe connection 3 Liquid pipe connection 4 Power & transmission connection 5 Earth screw 124(4.9) 80(3.1) 65(2.6) 3 2 5 *mm(inch) Remark 18 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 19
1. Indoor Unit LCN240CP/LC240CPI/LCN340CP/LC340CPI Wiring Diagrams Connector Number CN-POWER CN-MOTOR CN-DPUMP CN-DISP CN-FLOAT CN-REMO CN-CC CN- Remote control Dry-contact Room sensor In-pipe thermistor Out-pipe thermistor Elevation grille PTC Heater HVB Ass'y (Air cleaner) Service Manual 19
LG LC240CP | Service Manual - Page 20
Unit LCU240CP/LC240CPO Notes: BL RD YL BLUE RED YELLOW LCU340CP/LC340CPO BK BLACK OR ORANGE GN/YL GREEN/YELLOW BR BROWN WH WHITE FIELD WIRING Notes: BL RD YL BLUE RED YELLOW BK BLACK OR ORANGE GN/YL GREEN/YELLOW 20 Ceiling Cassette Air Conditioner BR BROWN WH WHITE FIELD
LG LC240CP | Service Manual - Page 21
OUTDOOR UNIT Refrigerant Cycle Diagrams Capillary Tube H/EX Gas Side Thermistor Accumulator Check Valve High pressure S/W Thermistor Check Valve Thermistor (Air) Heat Max. 25 100 115 Elevation (ft.) Rated Max. 16 50 16 66 Additional Refrigerant (oz/ft) 0.22 0.32 Service Manual 21
LG LC240CP | Service Manual - Page 22
select a place where noise and vibration are minimum. • Select a place so that the warm air and noise from the air conditioner do not disturb neighbors. • Rooftop Installations : If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring
LG LC240CP | Service Manual - Page 23
rigid mount. • When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of Ceiling Air Conditioner body Ceiling board Flat washer for M10 (accessory) Nut (W3/8 or M10) Paper model for installation Adjust ) Service Manual 23
LG LC240CP | Service Manual - Page 24
Installation 4. Wiring Connection 1. All wiring must comply with LOCAL REGULATIONS. 2. Select a power source that is capable of supplying the current as required by the air conditioner outdoor unit should be complied with the following specifications (Rubber insulation, type H05RN-F approved by HAR
LG LC240CP | Service Manual - Page 25
(Hexagon M5 screw) Control box cover Display Lead wire for louver motor and display CAUTION Inlet Grille Install certainly the decoration panel. Good example Cool air leakage causes sweating. Water drops fall. Bad example Air conditioner unit Ceiling board Decoration panel Fit the insulator
LG LC240CP | Service Manual - Page 26
Installation 6. Heat Insulation and pipings HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C(248°F) ). 2. Precautions in high humidity circumstance: Fastening band (accessory) This air conditioner has been tested
LG LC240CP | Service Manual - Page 27
Install the drain raising pipes at a right angle to the indoor unit and no more than 300mm(11.81inch) from the unit. Clamp metal(attached) Drain raising pipe Drain hose(attached) Drain test The air conditioner for normal operating and noise when electrical wiring is complete. • When the test is
LG LC240CP | Service Manual - Page 28
ITEMS WHEN INSTALLATION IS COMPLETE refrigerant and drain piping)? ❏ Is there any leakage of refrigerant? M4......118N.cm{12kgf.cm}{10.4lbf.in} M5......196N.cm{20kgf.cm}{17.4lbf.in} M6......245N.cm{25kgf.cm}{21.7lbf.in} M8......588N.cm{60kgf.cm}{52.1lbf.in} 28 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 29
one is more than 8°C(14.4°F). Installation Thermometer CAUTION After the confirmation of the above conditions, prepare the wiring as follows: 1) Never fail to have an individual power specialized for the air conditioner. As for the method of wiring, be guided by the circuit diagram pasted on
LG LC240CP | Service Manual - Page 30
. • In case of cooling mode, room temperature is controlled by the main body sensor. • To control the room temperature by a wired remote controller, install controller(room temp. sensor) to sense the temperature more accurately. • Maunfactured in the position 3. 30 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 31
Installation 2) Adjusting air volume to the height of ceiling You can choose the RPM(or air wire. CAUTION • Be careful not to exchange the color of wires. • The maximum length of connecting wire should be below 200m(656ft)(25Ω) on connecting each units. • Use a wire more than 0.5mm2 Service Manual
LG LC240CP | Service Manual - Page 32
Troubleshooting Guide Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air, and operating current. Temp. Difference Operating Current Temp. difference : approx. 0°C(0°F) All amount of refrigerant Air Conditioner
LG LC240CP | Service Manual - Page 33
Electronic Parts Troubleshooting Guide Trouble 1 The Product doesn't operate at all. Troubleshooting Guide Turn off the ? Check the Fuse of outdoor PCB Ass'y. Check the connecting state of wires Check the diagram wiring on the control panel Check the main power. Check the Auto Addressing Work
LG LC240CP | Service Manual - Page 34
Troubleshooting Guide Trouble 2 Product doesn't operate with the remote controller. Turn on main power. While the compressor has been stopped, the selecting. Check DISP PWB Ass'y -Voltage between CN1 DC +5V Check the Display PWB Ass'y • Check receiver ass'y 34 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 35
Trouble 3 When cooling does not operate Turn on Main Power Troubleshooting Guide Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1°C at least. When in Air to the connecting wire terminal support transferred to
LG LC240CP | Service Manual - Page 36
Troubleshooting Guide Trouble 4 When indoor Fan does not operate Turn off Main power Check the connection of CN-FAN or CN-MOTOR Check the Fan Motor Check the and 3(yellow) of CN-FAN or CN-MOTOR. About AC 160V over SSR is not damaged About AC 50V over SSR Check 36 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 37
Trouble 5 When Vertical Louver does not operate Troubleshooting Guide • Confirm that the Vertical Louver is normally +12V between pin (RED) of CN-U/D and GND. If there are no problems after above checks • Confirm the assembly conditions that are catching and interfering parts in the
LG LC240CP | Service Manual - Page 38
Troubleshooting Guide Self-diagnosis Function I Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. • Error mark is ON/OFF for the operation LED of OFF OFF OFF OFF OFF OFF OFF OFF 38 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 39
Troubleshooting Guide Troubleshooting CH01, CH02, CH06 Display code 01 Title Indoor air sensor Cause of error • Open / Short • Soldered poorly • Internal circuit error • Open / Short 02 Indoor inlet the sensor is 0 or 5Vdc, then sensor is abnormal. ¡ Repair or Change the PCB. Service Manual 39
LG LC240CP | Service Manual - Page 40
) ¡ Repair or Change the PCB. 3. Check the volt. Of main PCB power source. (DC 12V, DC 5V) ¡ Repair or Change the main PCB. 4. Check the installation of wired remote controller. (Noise interference) ¡ Adjust the state of installation 40 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 41
Float Troubleshooting Guide Check point & Normal condition • The connection of wire(Drain pump/ Float switch) • Drain pump power input. (220V) • Drain tube installation. • Indoor unit installation. (Inclination Drain pump power supply. (AC 230V) ¡ Repair or Change the main PCB. Service Manual 41
LG LC240CP | Service Manual - Page 42
is correctly connected. 5. Check the connection of GND1, GND2, and main GND. 6. If one indoor unit is operated normally, outdoor PCB is no problem. ¡ Check the another indoor unit. * CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit. 42 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 43
• Low / High press S/W open. Troubleshooting Guide Check point & Normal condition • Check install condition for over load. 3. Check the SVC V/V open. 4. Check the leakage of refrigerant. • CH 25 1. Check the power source. 2. Check the components (Trans1, B/Diode, Diode, Resistance) Service Manual
LG LC240CP | Service Manual - Page 44
Troubleshooting Guide Troubleshooting CH32, CH33 Display code 32 Title D-pipe (Inverter) temp. high ( 1. Check the install condition for over load. 2. Check the SVC V/V open. 3. Check the leakage of refrigerant. 4. Check the constant compressor. (same with CH21) 44 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 45
Troubleshooting Guide Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 Display code Title 41 D-pipe sensor (Inverter) Cause of error • Open / Short • Soldered poorly • Internal circuit error • Open / Short 44 Air of the sensor is 0 V or 5Vdc, then sensor is abnormal. Service Manual 45
LG LC240CP | Service Manual - Page 46
Troubleshooting Guide Troubleshooting CH51, CH60 Display code 51 Title Capacity Error Cause of error • Over Capacity Combination • Undder Capacity indoor unit capacity. • CH 60 1. Check the insertion condition of EEPROM. 2. Check the poor soldering 46 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 47
CH61, CH62 Troubleshooting Guide Display code 61 Title Condenser pipe sensor temp. Heat Sink temp. COMP Frequency (Hz) Normal Normal Check Point • CH 61 1. Check the install condition for over load. (Refrigerant, Pipe length, Blocked, ...) OFF Normal • CH 62 1. Check the fan is locked.
LG LC240CP | Service Manual - Page 48
Air purging 1. (Installation) Operation Pumping down 2. (Transfering) Evacuation 3. (Servicing) Gas charging 4. (Servicing) Pressure check 5. (Servicing) Gas releasing 6. (Servicing) Shaft position Service port Shaft position Service gauge) 48 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 49
Purge the air • Procedure service port. 4. Air purging of the charge hose. - Open the Low-handle valve on the gauge slightly to air purge from the hose. 5. Set the liquid side valve to the closed position. 6. Operate the air conditioner service port nut. - Use torque wrench to tighten the service
LG LC240CP | Service Manual - Page 50
(3-way) Valve (2) Evacuation (All amount of refrigerant leaked) Indoor unit Liquid side 2-Way valve Open Outdoor unit Gas side 3-Way valve Open pump oil becomes dirty or depleted,replenish as needed. 7. Mount the valve caps and the service port caps. 50 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 51
. - 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 service port nut. - Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m.(4.2kg.m/5.5kg
LG LC240CP | Service Manual - Page 52
Electronic Control Device Electronic Control Device • Main P.C.B ASM 52 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 53
-2 349480 249951 135500-1 337000 354211 352118 158591 263230-1 263230-2 267110-1 268714 W49800 552111 130411 349600 346810 359012 130911-3 130911-2 130911-4 152510 130911-1 330870 159830 266090 Service Manual 53
LG LC240CP | Service Manual - Page 54
ASSEMBLY,FINAL 359012 FAN,TURBO 552111 TUBE ASSEMBLY,CAPILLARY W49800 SUPPORTER ASSEMBLY Part No. REMARKS LCN240CP / LC240CPI LCN340CP / LC340CPI 4960A20080A R 5211A10600C 5211A10600A R 5421A10062A R 5900A10016A R 5211A10550B R 4981A21011A R 54 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 55
Service Manual 55 435512 435301 349480 437210 554031 137213-1 435300 349600 546810 567480-2 W0CZZ-1 W0CZZ-2 137213-2 559010 447910 552113 430410 268711 552112 567480-1 552117 435511 649950 554160
LG LC240CP | Service Manual - Page 56
ASSEMBLY,OUTDOOR 546810 MOTOR ASSEMBLY,OUTDOOR W49810 SUPPORTER ASSEMBLY 550140 DAMPER,COMPRESSOR 552112 TUBE SUCTION(OUTDOOR) 552203-1 VALVE,SERVICE 552203-2 VALVE,SERVICE 554031 CONDENSER ASSEMBLY,BENDING 554160 R R R R R R R R R R R R R R R R R R R R R R R R R 56 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 57
Service Manual 57 435512 135301 559010 437211 549610 546810 554031 554031 263230-1 263230-2 649950 W0CZZ-1 W0CZZ-2 268714 669200 552112 548490 135314 447910 435511 137212 430411 55211G 554160-2
LG LC240CP | Service Manual - Page 58
SERVICE 554031 CONDENSER ASSEMBLY,BENDING 554160-1 COMPRESSOR SET,KOREA 554160-2 COMPRESSOR SET,KOREA 559010 FAN ASSEMBLY,PROPELLER 561411 SOLENOID 649950 CASE ASSEMBLY,CONTROL(OUTDOOR) 669200 RELAY,CONTACT W0CZZ-1 CAPACITOR,FILM,BOX W0CZZ-2 CAPACITOR,FILM,BOX W49800 SUPPORTER Air Conditioner
LG LC240CP | Service Manual - Page 59
Model No.: PT-CDC1 Exploded View and Replacement Parts List 146811 268712 152312 135314 135802 137211 Service Manual 59
LG LC240CP | Service Manual - Page 60
268712 135802 PANEL ASSEMBLY,FRONT(INDOOR) GRILLE ASSEMBLY,FRONT(INDOOR) FILTER ASSY,AIR CLEANER MOTOR ASSEMBLY,STEP PWB(PCB) ASSEMBLY,DISPLAY DOOR Part No. PT-CDC1 3721A10106M 3531A10066A 5231A10004A 4681A20055A 6871A20096J 3580A20005A REMARKS R R R R R R 60 Ceiling Cassette Air Conditioner
LG LC240CP | Service Manual - Page 61
P/No.: 3828A20911A Printed in Korea