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LG LCN340CP Service Manual

LG LCN340CP Manual

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LG LCN340CP | 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 LCN340CP | Service Manual - Page 2
List of Functions ...11 5. Function of Remote Control 12 6. Specifications ...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
LG LCN340CP | Service Manual - Page 3
-C243HLF0 AT-C343HLF0 1 7.03 9.96 24 34 1Ø, 208-230V, 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 LCN340CP | Service Manual - Page 4
properties only. I Meanings of symbols used in this manual are as shown below. Be sure not to do. Be sure to follow the instruction. I Installation Do not use a defective or under- Always ground the product. rated circuit breaker. Use this appliance on a dedicated circuit. • There is risk of fire
LG LCN340CP | Service Manual - Page 5
and evaporator. For installation, always contact the dealer or an Authorized Service Center. • There is risk of fire, electric shock, explosion, is risk of fire or electrical shock. Do not place a heater or other appliances near the power cable. Do not let electric parts of the product get wet.
LG LCN340CP | Service Manual - Page 6
of physical injury, electric shock, or prod- • There is risk of fire, electric shock, or product damage. uct failure. I Installation 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
LG LCN340CP | Service Manual - Page 7
or other objects through the air inlet or outlet while the product is operated. • There are sharp and moving parts that could cause personal injury. Service Manual 7
LG LCN340CP | Service Manual - Page 8
Features & Benefits Features & Benefits Environment Friendly Refrigerant : - LG Ceiling Cassette Air Conditioners uses environment friendly refrigerant, which don't do any harm to the environment. Plasma Air Purifier : - It removes not only microscopic contaminants & dust, but also house mites,
LG LCN340CP | Service Manual - Page 9
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 Flow can be controlled easily regarding any in the Indoor unit & the other one is in the LCD wired remote. Service Manual 9
LG LCN340CP | Service Manual - Page 10
Features & Benefits High Ceiling Operation - According to the height of ceiling installation, it provides variability of indoor fan motor rpm. If the height of installation is low then you can adjust low rpm of indoor fan motor. On the other hand if the height of the installation is high you can
LG LCN340CP | Service Manual - Page 11
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 LCN340CP | Service Manual - Page 12
Function of Remote Control Function of Remote Control 1. Wireless LCD Remote Control Signal transmitter 5 1 6 3 4 2 10 CANCEL 7 9 11 ON OFF SET AUTO CLEAN 12 17 8 13 °C/°F 18 14 15 16 Flip-up door (opened) Operation Mode Cooling Operation Auto Operation Healthy
LG LCN340CP | Service Manual - Page 13
weekly timer. 17 Swirl Button Used to select swirl swing mode. 18 Reset Button Used to set the current time and clear the setting time. Service Manual 13
LG LCN340CP | Service Manual - Page 14
rate l/h(pts/h) 3.0(6.3) 3.7(7.8) Safety Devices Fuse, Thermal protector for Fan motor Temperature sensor Thermistor Thermistor Refrigerant R410A R410A Refrigerant control EEV EEV Connectable outdoor Unit Single Single Power and Transmission interunit cable No.* mm2 (No
LG LCN340CP | Service Manual - Page 15
Motor Type Oil charge volume cc Oil type Refrigerant Charge(at 7.5m(25ft)) g(oz) Type 6 / 370 Direct Drive Side discharge 51(1801) 55 6.35(1/4) 12.7(1/2) 30(100) 15(50) AT-C343HLFO (LCU340CP /LC340CPO) 9.96 34,000 3.6 17 38 2 / 208-230 / 60 3 * 3.3(12) 4 * 2.1(14 CMM × 35.3 Service Manual 15
LG LCN340CP | Service Manual - Page 16
Dimensional Drawings Dimensional Drawings 1. Indoor Units Model No.: LCN240CP/LC240CPI/LCN340CP/LC340CPI 950(37.4) 225(8.9) 950(37.4) 950(37.4) 1 3 2 950(37.4) 900(35.4) (ceiling opening) 840(33.1) 688(27.1) (hanging bolt) 840(33.1) 688(27.1) 950(37.4) 806(31.7) (hanging bolt) 840(33.1) 900(35
LG LCN340CP | 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 LCN340CP | Service Manual - Page 18
Dimensional Drawings Model No.: LCU340CP/LC340CPO 900(35.4) 550(21.7) 175(6.9) 370(14.6) 395(15.6) 15(0.6) 565(22.2) 273(10.7) 370(14.6) 4 1 520(20.5) 1135(44.7) 1165(45.9) 308(12.1)
LG LCN340CP | Service Manual - Page 19
Unit LCN240CP/LC240CPI/LCN340CP/LC340CPI Wiring Diagrams Connector Number CN-POWER CN-MOTOR CN-DPUMP CN-DISP CN-FLOAT CN-REMO CN-CC CN-ROOM CN-PIPE1 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 LCN340CP | Service Manual - Page 20
Wiring Diagrams 2. Outdoor 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
LG LCN340CP | Service Manual - Page 21
Only Models INDOOR UNIT OUTDOOR UNIT Refrigerant Cycle Diagrams Capillary Tube H/EX Gas Side Thermistor Accumulator Check Valve High pressure S/W Thermistor Rated Max. 25 100 115 Elevation (ft.) Rated Max. 16 50 16 66 Additional Refrigerant (oz/ft) 0.22 0.32 Service Manual 21
LG LCN340CP | Service Manual - Page 22
. Consult local codes regarding rooftop mounting. Sunroof More than 30cm(11.8inch) More than 50cm(19.7inch) Sunroof More than 50cm(19.7inch) (Service space) oFbesntcaecloers More than 30cm(11.8inch) oFbesntcaecloers More than 50cm(19.7inch) More than 70cm(27.6inch) More than 50cm(19.7inch
LG LCN340CP | Service Manual - Page 23
. • Drill the piping hole on the wall slightly tilted to the outdoor side using a Ø 70(2.76inch) hole-core drill. Indoor Wall Outdoor 5~7mm (0.20~0.28inch) Service Manual 23
LG LCN340CP | Service Manual - Page 24
) 20mm(0.8inch) 20mm(0.8inch) If the supply cord is damaged, it must be replaced by a special cord or assembly available from the manufacturer of its service agent. WARNING Make sure that the screws of the terminal are free from looseness. 24 Ceiling Cassette Air Conditioner
LG LCN340CP | Service Manual - Page 25
Fit the insulator (this part) and be careful for cool air leakage Air conditioner unit Air Cool air leakage (no good) Ceiling board Decoration panel Service Manual 25
LG LCN340CP | Service Manual - Page 26
on all air conditioners that are located in ceiling atmosphere. • In addition to the normal heat insulation (thickness: more than 8mm(0.31inch)) for refrigerant piping (gas piping: thick piping) and drain piping, add further 10mm to 30mm(0.39inch to 1.18 inch) thickness material. FORM THE PIPINGS
LG LCN340CP | Service Manual - Page 27
In case of the Outdoor Unit being installed above position of the Indoor Unit. 2. Tape the Pipings and Connecting cable from bottom to top. 3. Form the pipings gathered by taping along the exterior wall, and make the trap prevent water from entering into the room. 4. Fix the pipings onto the wall by
LG LCN340CP | Service Manual - Page 28
Is the draining smooth? ❏ Is there any faulty wiring? ❏ Is the heat insulation complete ❏ Are not terminal screws loosened? (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
LG LCN340CP | Service Manual - Page 29
conditioner. As for the method of wiring, be guided by the circuit diagram pasted on the inside of control box cover. 2) where it is wet or moist. 9) The following troubles would be caused by voltage drop-down. • Vibration of manual (air filter cleaning, temperature control, etc.). Service Manual 29
LG LCN340CP | Service Manual - Page 30
Installation 9. Optional Operation 1) Two Thermistor System (1) Open the rear cover of the wired remote-controller to set the mode. (2) Select one of three selectable modes as follows. • Position 1: The room themperature is controlled by the thermistor of the wired remote-controller, control the
LG LCN340CP | Service Manual - Page 31
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 31
LG LCN340CP | 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 leaked out. Current
LG LCN340CP | Service Manual - Page 33
Electronic Parts Troubleshooting Guide Trouble 1 The Product doesn't operate at all. Troubleshooting Guide Turn off the 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 Confirm
LG LCN340CP | 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 compressor does not operate owing to the
LG LCN340CP | Service Manual - Page 35
Trouble 3 When cooling does not operate Turn on Main Power Troubleshooting Guide Operate "Cooling Mode( )" by compressor. • When the power(About AC208V-230V) is applied to the connecting wire terminal support transferred to compressor, PWB Ass'y is normal. • Check the circuit related to the relay
LG LCN340CP | 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
LG LCN340CP | 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 LCN340CP | 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 evaporator body in the same manner as the following table. • If more
LG LCN340CP | 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 . 8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. ¡ Repair or Change the PCB. Service Manual 39
LG LCN340CP | Service Manual - Page 40
Troubleshooting Guide Troubleshooting CH03 Display code Title Cause of error 03 Communication Wired R/C • Open / Short • Wrong connection Check point & Normal condition • Connection of wire • Main PCB Volt. DC12V •
LG LCN340CP | Service Manual - Page 41
Drain pump / Float switch Cause of error • Float switch Open. (Normal : short) CN Float Troubleshooting Guide Check point & Normal condition • The connection of wire(Drain pump/ Float switch) • Drain pump . Of Drain pump power supply. (AC 230V) ¡ Repair or Change the main PCB. Service Manual 41
LG LCN340CP | Service Manual - Page 42
Troubleshooting Guide Troubleshooting CH05, CH53 Display code Title 05 / Communication 53 (Indoor ¡ Outdoor) Cause of , 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
LG LCN340CP | Service Manual - Page 43
Open Cause of error • Low / High press S/W open. Troubleshooting Guide Check point & Normal condition • Check the connection of "CN_Press". 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 43
LG LCN340CP | Service Manual - Page 44
Troubleshooting Guide Troubleshooting CH32, CH33 Display code 32 Title D-pipe (Inverter) temp. high (105 Check the install condition for over load. 2. Check the SVC V/V open. 3. Check the leakage of refrigerant. 105°C (221°F) 90°C (194°F) 80°C (176°F) COMP OFF LEV OPEN LEV OPEN NORMAL Constant
LG LCN340CP | 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 0 kΩ or ∞, then sensor is abnormal. Ω If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal. Service Manual 45
LG LCN340CP | Service Manual - Page 46
Troubleshooting Guide Troubleshooting CH51, CH60 Display code 51 Title Capacity Error Cause of error • Over Capacity Combination • Undder Capacity Combination EEPROM 60 Check sum • Check sum error Check
LG LCN340CP | Service Manual - Page 47
CH61, CH62 Troubleshooting Guide Display code 61 Title Condenser pipe sensor temp. high Cause (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. 2. Check the Outdoor
LG LCN340CP | Service Manual - Page 48
(Gas Side) Valve cap Open position Closed position Pin To piping connection Service Service port cap port To outdoor unit Valve cap Open position Closed position Pin To piping connection Service Service port cap port To outdoor unit Works Shipping Air purging 1. (Installation) Operation
LG LCN340CP | Service Manual - Page 49
manifold gauge to the service port of the gas side valve. - Connect the hose of the gauge with the push pin to the service port. 4. Air purging the liquid side and gas side valve caps and the service port nut. - Use torque wrench to tighten the service port nut to a torque of 1.8kg.m.(4.2kg.m/5.5kg
LG LCN340CP | Service Manual - Page 50
(3-way) Valve (2) Evacuation (All amount of refrigerant leaked) Indoor unit Liquid side 2-Way valve position. 2. Connect the vaccum pump to the center hose of the manifold gauge. 3. Connect the service port of the gas side valve to the low side of the gauge. 4. Evacuation for approximately one
LG LCN340CP | Service Manual - Page 51
gas side valve's service port. This is different from previous procedures. Because you are charging with liquid refrigerant from the gas 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.m.) - Be sure to check for gas leakage. Service Manual
LG LCN340CP | Service Manual - Page 52
Electronic Control Device Electronic Control Device • Main P.C.B ASM 52 Ceiling Cassette Air Conditioner
LG LCN340CP | Service Manual - Page 53
-3 130911-4 W49810 130911-2 152510 130911-1 552111 330870 159830 266090 The model name of Front Panel for this model is "PT-CDC1" (Refer to 59 page) Service Manual 53
LG LCN340CP | Service Manual - Page 54
ASSEMBLY,MENIFOLD(INDOOR) 354211 EVAPORATOR ASSEMBLY,FINAL 359012 FAN,TURBO 552111 TUBE ASSEMBLY,CAPILLARY W49800 SUPPORTER ASSEMBLY Part No. REMARKS LCN240CP / LC240CPI LCN340CP / LC340CPI 3041A10069A R 3091A10075E R 3091A10085C R 3091A10077A R 3091A10075F R 3550A30273A R 5251A10003A
LG LCN340CP | Service Manual - Page 55
137213-2 W4810 349600 546810 559010 447910 567480-2 W0CZZ-1 W0CZZ-2 268711 552112 567480-1 552117 561410 554160 649950 W49810 435511 437210 552113 430410 552114 550140 552203-1 552203-2 Service Manual 55
LG LCN340CP | Service Manual - Page 56
(SUB) 447910 BARRIER ASSEMBLY,OUTDOOR 546810 MOTOR ASSEMBLY W49810 SUPPORTER ASSEMBLY 550140 DAMPER,COMPRESSOR 552112 TUBE ASSEMBLY,CONDENSER(IN) 552113 552117 TUBE ASSEMBLY,SUCTION(OUTDOOR) 552203-1 VALVE,SERVICE 552203-2 VALVE,SERVICE 554031 CONDENSER ASSEMBLY,BENDING 554160 COMPRESSOR SET,KOREA
LG LCN340CP | Service Manual - Page 57
Model No.: LCU340CP/LC340CP0 435512 549610 546810 554031 554031 Exploded View and Replacement Parts List 437211 559010 559010 546810 567480 W0CZZ-1 W0CZZ-2 437212 268711 W6920 552115 552117 552113 55211G 561410 554160-2 554160-1 W49810 552203-2 552114 552203-1 Service Manual 57
LG LCN340CP | Service Manual - Page 58
DISCHARGE(OUTDOOR) 55211G TUBE ASSEMBLY,EXPANSION 552203-1 VALVE,SERVICE 552203-2 VALVE,SERVICE 554031 CONDENSER ASSEMBLY,BENDING 554160-1 COMPRESSOR SET,KOREA 554160 W0CZZ-2 CAPACITOR,FILM,BOX W49810 SUPPORTER 268711 PCB ASSEMBLY,MAIN Part No. LCU340CP / LC340CPO 3530AP1225D 3720AP1202L 3721A20229A
LG LCN340CP | Service Manual - Page 59
Model No.: PT-CDC1 Exploded View and Replacement Parts List 146811 268711 159830 135316 135800 137211 Service Manual 59
LG LCN340CP | Service Manual - Page 60
Exploded View and Replacement Parts List Parts List LOCATION No. DESCRIPTION 137211 135316 159830 146811 268711 135800 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
LG LCN340CP | Service Manual - Page 61
P/No.: 3828A20911A Printed in Korea