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LG Electronics LCN240CP manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    LG Ceiling Cassette Air Conditioner SERVICE MANUAL LG CAUTION website http://www.lgservice.com e-mail http://www.lgeservice.com/techsup.html • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL. MODEL: LCN240CP/LCU240CP LC240CPI/LC240CPO LCN340CP/LCU340CP LC340CPI/LC340CPO[...]

  • Page 2

    2 Ceiling Cassette Air Conditioner T ABLE OF CONTENTS T able of contents P age 1. Models List .......................................................................................................................3 2. Saf ety Precautions .......................................................................................................... .4 3.[...]

  • Page 3

    Models List Ser vice Manual 3 Models List ❈ Local model name Local Model 1 Indoor Outdoor Indoor Outdoor Local Model 2 Factory AT-C243HLF0 AT-C343HLF0 LCN240CP LCN340CP LCU240CP LCU340CP LC240CPI LC340CPI LC240CPO LC340CPO 1.2 Outdoor units Chassis 1Ø, 208-230V, 60Hz Power supply 34 24 kBtu /h 9.96 7.03 kW Total capacity index of connectable ind[...]

  • Page 4

    4 Ceiling Cassette Air Conditioner Safety Precautions T o pre vent injury to the user or other people and proper ty damage, the f ollo wing instr uctions must be f ollowed. ■ Incorrect operation due to ignoring instruction will cause har m or damage. The seriousness is classified by the f ollowing indications. ■ Meanings of symbols used in this[...]

  • Page 5

    Ser vice Manual 5 ■ Operational Do not install, remove, or re- install the unit by y our self (customer). • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpacking and installing the product. • Sharp edges could cause injury. Be especially careful of the case edges and the fins on the con- denser and evaporator[...]

  • Page 6

    6 Ceiling Cassette Air Conditioner ■ Installation Do not open the inlet grill of the product during operation. (Do not touch the electr ostatic filter , if the unit is so equipped.) • There is risk of physical injury, electric shock, or prod- uct failure. Be cautious that water could not enter the product. • There is risk of fire, electric sh[...]

  • Page 7

    Ser vice Manual 7 Keep le vel even when installing the pr oduct. • To avoid vibration or water leakage. Use two or more people to lift and transport the product. • Avoid personal injury. Use a soft cloth to c lean. Do not use harsh detergents, solvents, etc. • There is risk of fire, electric shock, or damage to the plastic parts of the produc[...]

  • Page 8

    8 Ceiling Cassette Air Conditioner F eatures & Benefits En vir onment Friendly Refrigerant : - LG Ceiling Cassette Air Conditioners uses environ- ment 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, pollen, and pet fur t[...]

  • Page 9

    Swirl Swing - It is the function for comfort cooling/heating operation. - The diagonal two louvers are opened the more larger than the other louvers. After one minute, it is opposite. Space Contr ol Vanes angle can be controlled by pair, considering its installation environment. - For example direct drafts can be annoying, leading to discomfort and[...]

  • Page 10

    10 Ceiling Cassette Air Conditioner F eatures & Benefits High Ceiling Operation - According to the height of ceiling installation, it pro- vides 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 adjust hig[...]

  • Page 11

    Ser vice Manual 11 List of Functions • Ceiling Cassette List of Functions Air supply outlet Airflow direction control (left & right) Airflow direction control (up & down) Auto swing (left & right) Air flow Auto swing (up & down) Airflow steps(Fan / Cool / Heat) CHAOS swing CHAOS wind (Auto wind) Jet cool (Power wind) Swirl wind De[...]

  • Page 12

    12 Ceiling Cassette Air Conditioner Function of Remote Control 1. Wireless LCD Remote Contr ol Function of Remote Contr ol Cooling Operation Auto Operation Healthy Dehumidification Operation Operation Mode ON OFF CANCEL SET ° C/ ° F AUT O CLEAN 1 3 5 4 9 10 12 18 16 7 2 8 13 15 11 6 Flip-up door (opened) Signal transmitter 17 14 1. START/STOP BUT[...]

  • Page 13

    Ser vice Manual 13 Function of Remote Control Timer Cancel 2ndF Program Week Hour Min Holiday Set/Clr RESET Plasma Operation unit Humidify AUT O SWING OPERA TION F AN SPEED Program set SUB FUNCTION SET TEMP Room T emp 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 3 10 12 14 15 11[...]

  • Page 14

    14 Ceiling Cassette Air Conditioner Specifications Specifications Note : 1. Capacities are based on the following conditions: Cooling: - Indoor Temperature 26.7 ° C(80 ° F) DB /19.4 ° C(67 ° F) WB - Outdoor Temperature 35 ° C(95 ° F) DB /23.9 ° C(75 ° F) WB Piping Length - Interconnecting Piping Length 7.5m(25ft) - Level Difference of Zero.[...]

  • Page 15

    Ser vice Manual 15 Specifications Rated Capacity Cooling kW Btu/h Heating kW Btu/h Rated Input Cooling kW Heating kW Energy Label Testing combination Running current Cooling A Heating A Starting current (Cooling/Heating) A Power supply Phase / Volts / Hz Power supply Cable(outdoor) No. * mm 2 (No. AWG) Power and transmission cable No. * mm 2 (No. A[...]

  • Page 16

    16 Ceiling Cassette Air Conditioner 225(8.9) 950(37.4) 950(37.4) 840(33.1) 7 76(3.0) 135(5.3) 4 5 225(8.9) 6 806(31.7) 840(33.1) 840(33.1) 688(27.1) 950(37.4) 30(1.18) 950(37.4) R35(1.4) 3 2 1 900(35.4) (ceiling opening) 688(27.1) (hanging bolt) 840(33.1) 900(35.4) (ceiling opening) 950(37.4) 806(31.7) (hanging bolt) 840(33.1) Drain pipe connection[...]

  • Page 17

    Ser vice Manual 17 870(34.3) 546(21.5) 54.6(2.1) 333(13.1) Ø 531(20.9) 10(0.4) 808(31.8) 782.5(30.8) 392(15.4) 25.5(1.0) 80(3.1) 50(2.0) 320(12.6) 320(12.6) 340(13.4) 360(14.2) 160(6.3) *mm(inch) Dimensional Dra wings Model No.: LCU240CP/LC240CPO 2. Outdoor Units[...]

  • Page 18

    18 Ceiling Cassette Air Conditioner Dimensional Dra wings Model No.: LCU340CP/LC340CPO Gas pipe connection P ar t Name Air discharge grille Liquid pipe connection Ear th screw P ower & tr ansmission connection 5 No . 2 4 3 1 Remark 5 1135(44.7) 1165(45.9) 308(12.1) 565(22.2) 273(10.7) 520(20.5) 80(3.1) 124(4.9) 900(35.4) 550(21.7) 370(14.6) 395[...]

  • Page 19

    Ser vice Manual 19 Wiring Diagrams 1. Indoor Unit LCN240CP/LC240CPI/LCN340CP/LC340CPI Wiring Diagrams Connector Number Location CN-POWER AC power supply CN-MOTOR BLDC fan motor output CN-DPUMP Drain pump output CN-DISP Display CN-FLOAT Float switch input CN-REMO Remote control CN-CC Dry-contact CN-ROOM Room sensor CN-PIPE1 In-pipe thermistor CN-PIP[...]

  • Page 20

    20 Ceiling Cassette Air Conditioner Wiring Diagrams LCU240CP/LC240CPO LCU340CP/LC340CPO 2. Outdoor Unit Notes: BL RD YL BLUE RED YELLOW BK OR GN/YL BLACK ORANGE GREEN/YELLOW BR WH BRO WN WHITE FIELD WIRING Notes: BL RD YL BLUE RED YELLOW BK OR GN/YL BLACK ORANGE GREEN/YELLOW BR WH BRO WN WHITE FIELD WIRING[...]

  • Page 21

    Ser vice Manual 21 Refrigerant Cycle Diagrams 1. Cooling Only Models INDOOR UNIT H/EX LIQUID SIDE Gas Side GAS SIDE Capillary T ube OUTDOOR UNIT Thermistor (Air) E.E.V . Accumulator Heat Exchanger Check V alve Constant Compressor 1 Constant Compressor 2 Check V alve Thermistor Thermistor High pressure S/W Thermistor 24k 34k Gas Liquid Rated Max. Ra[...]

  • Page 22

    22 Ceiling Cassette Air Conditioner Installation More than 30cm(11.8inch) Fence or obstacles Sunr oof Fence or obstacles Sunroof More than 50cm(19.7inch) (Service space) More than 30cm(11.8inch) More than 50cm(19.7inch) More than 70cm(27.6inch) More than 50cm(19.7inch) More than 100cm(39.4inch) More than 50cm(19.7inch) More than 50cm(19.7inch) 1.2 [...]

  • Page 23

    Ser vice Manual 23 Installation Bolt Tubing connection 2. Settlement of outdoor unit • Anchor the outdoor unit with a bolt and nut( ø 10mm(0.39inch)) tightly and horizontally on a concrete or rigid mount. • When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assum- ing the influence of wind and e[...]

  • Page 24

    24 Ceiling Cassette Air Conditioner Installation 4. Wiring Connection Make sure that the screws of the terminal are free from looseness. WARNING 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. 3. Feed the power source to the unit via a distributi[...]

  • Page 25

    Ser vice Manual 25 Installation 5. Installation of Decoration P anel 1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by amount 10mm(0.39inch) in length.) The fixing screws (hexagon M5 screw) are included the indoor unit box. 2. Remove the air inlet grille from the decoration panel. (Remove the hoo[...]

  • Page 26

    26 Ceiling Cassette Air Conditioner Installation 6. Heat Insulation and pipings 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: This air conditioner has been tested according to the "KS Standard Conditions with Mist&q[...]

  • Page 27

    Ser vice Manual 27 Installation 7. Drain Pipe W ork ■ Drain Piping of Ceiling Cassette • Drain piping must have down-slope (1/50 to 1/100): be sure not to provide up-and-down slope to prevent reversal flow. • During drain piping connection, be careful not to exert extra force on the drain port on the indoor unit. • The outside diameter of t[...]

  • Page 28

    28 Ceiling Cassette Air Conditioner Installation 1) PRECA UTIONS IN TEST RUN • The initial power supply must provide at least 90% of the rated voltage. Otherwise, the air conditioner should not be operated. For test run, carry out the cooling operation first even during winter season. Carry out the test run more than 5 minutes without stopping. ([...]

  • Page 29

    Ser vice Manual 29 Installation Thermometer 2) Connection of power suppl y 1. Connect the power supply cord to the independent power supply. • Circuit breaker is required. 2. Operate the unit for fifteen minutes or more. 3) Evaluation of the perf ormance 1. Measure the temperature of the intake and dis- charge air. 2. Ensure the difference betwee[...]

  • Page 30

    30 Ceiling Cassette Air Conditioner Installation 9. Optional Operation 1) T wo 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 temperature ac[...]

  • Page 31

    Ser vice Manual 31 Installation 2) Adjusting air v olume to the height of ceiling You can choose the RPM(or air volume) of indoor motor according to the height of ceiling to supply the com- fortable atmosphere to consumers. Procedure 1. Choose the selectable position in the table after measuring the height of ceiling. 2. In the case of changing the[...]

  • Page 32

    32 Ceiling Cassette Air Conditioner T roubleshooting Guide T rouble anal ysis 1. Check temperature difference between intake and discharge air, and operating current. All amount of refrigerant leaked out. Check refrigeration cycle. Refrigerant leakage Clog of refrigeration cycle Defective compressor Excessive amount of refrigerant Normal Notice: Te[...]

  • Page 33

    Ser vice Manual 33 T roubleshooting Guide Electr onic P ar ts T r oubleshooting Guide The Product doesn ’ t operate at all. Turn off the main power and wait until LED on outdoor PCB is off Turn on the main power again. Does the Operating LED of indoor unit blink When Operation's ON? Refer to the self-diagnosis function. Is the Connection bet[...]

  • Page 34

    34 Ceiling Cassette Air Conditioner T roubleshooting Guide Turn on main power. While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is not controlled by the remote controller. (W[...]

  • Page 35

    Ser vice Manual 35 T roubleshooting Guide When cooling does not operate T r ouble 3 Turn on Main Power 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 Circulation Mode, Compressor/Outdoor Fan is stopped. Check the sensor for in[...]

  • Page 36

    36 Ceiling Cassette Air Conditioner T roubleshooting Guide When indoor F an does not operate T r ouble 4 Check the SSR high speed operation by remote control. (The Indoor Fan Motor is connected) Turn off Main power Check the connection of CN-FAN or CN-MOTOR Check the Fan Motor Check the Fuse(AC250V/T2A) Turn ON Main Power Check the related circuit [...]

  • Page 37

    Ser vice Manual 37 T roubleshooting Guide • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Vertical Louver with hands Normal • Check the connecting condition of CN-U/D Connector • Check the soldering condition(on PWB) of CN-U/D Connector If there ar[...]

  • Page 38

    38 Ceiling Cassette Air Conditioner T roubleshooting Guide ■ 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 than two troubles occur simultan[...]

  • Page 39

    Ser vice Manual 39 T roubleshooting Guide Ω 10k Ω Check the resistance Check the voltage V 2.5Vdc 01 02 06 Indoor air sensor Indoor inlet pipe sensor Indoor outlet pipe sensor • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • I[...]

  • Page 40

    40 Ceiling Cassette Air Conditioner T roubleshooting Guide T roub leshooting CH03 Check the Volt. Indoor Unit V 12Vdc 12V S GND Check the Volt. Wired R/C V 12Vdc 12V S GND 03 Communication Wired R/C • Open / Short • Wrong connection • Connection of wire • Main PCB Volt. DC12V • Noise interference Display code Title Cause of error Check po[...]

  • Page 41

    Ser vice Manual 41 T roubleshooting Guide T roub leshooting CH04 Check the resistance Ω 0 Ω CN Float 04 Drain pump / Float switch • Float switch Open. (Normal : short) • The connection of wire(Drain pump/ Float switch) • Drain pump power input. (220V) • Drain tube installation. • Indoor unit installation. (Inclination) Display code Ti[...]

  • Page 42

    42 Ceiling Cassette Air Conditioner T roubleshooting Guide T roub leshooting CH05, CH53 05 / 53 Communication (Indoor → Outdoor) • Communication poorly • Power input AC 220V. (Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. • The GND1,2 is not connected at main GND. • The com[...]

  • Page 43

    Ser vice Manual 43 T roubleshooting Guide T roub leshooting CH24, CH25 24 25 Press S/W Open Input voltage • Low / High press S/W open. • Abnormal Input voltage (140Vac , 300Vac . • Check the connection of “ CN_Press ” . • Check the components. • Check the power source. • Check the components. Display code Title Cause of error Check [...]

  • Page 44

    44 Ceiling Cassette Air Conditioner T roubleshooting Guide T roub leshooting CH32, CH33 32 33 D-pipe (Inverter) temp. high (105 ° C(221 ° F) ) D-pipe (Constant) temp. high (105 ° C(221 ° F) ) • Discharge sensor (Inverter) temp. high • Discharge sensor (Cons.) temp. high • Check the discharge pipe sensor for INV. • Check the install cond[...]

  • Page 45

    Ser vice Manual 45 T roubleshooting Guide T roub leshooting CH41, CH44, CH45, CH46, CH47, CH65 Ω 41 44 45 46 47 65 D-pipe sensor (Inverter) Air sensor Condenser Pipe sensor Suction Pipe sensor D-pipe sensor (Constant) Heat sink sensor • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal[...]

  • Page 46

    46 Ceiling Cassette Air Conditioner T roubleshooting Guide T roub leshooting CH51, CH60 51 60 Capacity Error EEPROM Check sum • Over Capacity Combination • Undder Capacity Combination • Check sum error • Check the indoor unit capacity. • Check the combination table. • Check the PCB ASM P/No. • Check the poor soldering. Display code Ti[...]

  • Page 47

    Ser vice Manual 47 T roubleshooting Guide T roub leshooting CH61, CH62 61 62 Condenser pipe sensor temp. high Heat sink sensor temp. high • Condenser pipe sensor detected high temp.(65 ° C)(149 ° F) • Heat sink sensor detected high temp.(85 ° C)(185 ° F) • Check the load condition. • Check the sensor of Condenser pipe sensor. • Check [...]

  • Page 48

    48 Ceiling Cassette Air Conditioner (3-wa y) V alve (3-wa y) V alve 3-way Valve (Liguid Side) 3-way Valve (Gas Side) Works Shaft position Shaft position Service port Shipping Closed Closed Closed (with valve cap) (with valve cap) (with cap) Air purging Open Closed Open (Installation) (counter-clockwise) (clockwise) (push-pin or with vacuum pump) Op[...]

  • Page 49

    Ser vice Manual 49 (3-wa y) V alve • Procedure For pumping down,firstly short the Low Pressure s/w at the outside and then operate below proce- dure. 1. Confirm that both the gas side and liquid side valves are set to the open position. - Remove the valve stem caps and confirm that the valve stems are in the raised position. - Be sure to use a he[...]

  • Page 50

    50 Ceiling Cassette Air Conditioner (3-wa y) V alve (2) Ev acuation (All amount of refrigerant leaked) • Procedure 1. Confirm that both the liguid side valve and gas side valve are set to the opened 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 t[...]

  • Page 51

    Ser vice Manual 51 (3-wa y) V alve (3) Gas Charging (After Evacuation) • Procedure 1. Connect the gauge to the charging cylinder. - Connect the charge hose which you disconnect- ed from the vacuum pump to the valve at the bottom of the cylinder. - If you are using a gas cylinder, also use a scale and reverse the cylinder so that the system can be[...]

  • Page 52

    52 Ceiling Cassette Air Conditioner Electronic Control De vice Electr onic Contr ol De vice • Main P .C.B ASM <Indoor> <Outdoor>[...]

  • Page 53

    Ser vice Manual 53 Exploded View and Replacement P ar ts List 130411 346810 359012 130911-3 130911-4 130911-2 130911-1 152510 330870 159830 354211 W49800 352118 158591 552111 263230-1 249951 135500-1 337000 349480 263230-2 267110-1 267110-2 268714 266090 349600 Exploded Vie w and Replacement P ar ts List Model No.: LCN240CP/LCN340CP 1. Indoor Unit[...]

  • Page 54

    54 Ceiling Cassette Air Conditioner Exploded View and Replacement P ar ts List P ar ts List 130411 BASE ASSEMBLY,WELD(INDOOR) 3041A10069A R 130911-1 CABINET ASSEMBLY,INDOOR 3091A10075E R 130911-2 CABINET ASSEMBLY,INDOOR 3091A10085C R 130911-3 CABINET ASSEMBLY,INDOOR 3091A10077A R 130911-4 CABINET ASSEMBLY,INDOOR 3091A10075F R 135500-1 COVER 3550A30[...]

  • Page 55

    Ser vice Manual 55 Exploded View and Replacement P ar ts List 435301 349480 554031 546810 559010 649950 552203-1 552203-2 437210 430410 550140 435512 447910 349600 552112 552117 552114 554160 567480 -2 435511 137213-1 435300 137213-2 552113 26871 1 567480- 1 W0CZZ-1 W0CZZ-2 Model No.: LCU240CP 2. OUTDOOR UNITS[...]

  • Page 56

    56 Ceiling Cassette Air Conditioner Exploded View and Replacement P ar ts List P ar ts List 137213-1 PANEL ASSEMBLY,SIDE 1A00202F R 137213-2 PANEL ASSEMBLY,SIDE 3A02284N R 567480 -1 THERMISTOR,NTC 6323A20028B R 567480 -2 THERMISTOR,NTC 6323A20023E R 349480 ORIFICE 4948AP2527A R 349600 BRACKET,MOTOR 1A00206B R 430410 BASE ASSEMBLY,OUTDOOR 3041AP2741[...]

  • Page 57

    Ser vice Manual 57 Exploded View and Replacement P ar ts List Model No.: LCU340CP/LC340CP0 546810 649950 552203-1 552203-2 435512 559010 554031 554031 W0CZZ-1 W0CZZ-2 268714 135314 669200 263230-2 263230-1 549610 437211 135301 435511 137212 447910 430411 W49800 552114 554160-2 548490 552112 55211G 554160-1[...]

  • Page 58

    58 Ceiling Cassette Air Conditioner Exploded View and Replacement P ar ts List P ar ts List 135301 GRILLE,DISCHARGE 3530AP1225D R 135314 PANEL ASSEMBLY,REAR(OUTDOOR) 3720AP1202L R 137212 PANEL ASSEMBLY,SIDE 3721A20229A R 263230-1 THERMISTOR,NTC 6323A20019C R 263230-2 THERMISTOR,NTC 6323A20023E R 430411 BASE ASSEMBLY,WELD(OUTDOOR) 3041A20047Z R 4355[...]

  • Page 59

    Ser vice Manual 59 Exploded View and Replacement P ar ts List 152312 135314 146811 137211 268712 135802 Model No.: PT -CDC1[...]

  • Page 60

    60 Ceiling Cassette Air Conditioner Exploded View and Replacement P ar ts List P ar ts List 137211 PANEL ASSEMBLY,FRONT(INDOOR) 3721A10106M R 135314 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A10066A R 135312 FILTER ASSY,AIR CLEANER 5231A10004A R 146811 MOTOR ASSEMBLY,STEP 4681A20055A R 268712 PWB(PCB) ASSEMBLY,DISPLAY 6871A20096J R 135802 DOOR 3580A20005A [...]

  • Page 61

    P/No.: 3828A20911A Printed in Korea[...]