Related Manuals for LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0)
Summary of Contents for LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0)
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Page 1: Floor Standing Type
Floor Standing Type Air Conditioner SERVICE MANUAL MODEL: LF300CP(LP-C303R20) LF480CE(LP-C483TA0) -
Page 2: Table Of Contents
Contents Safety Precautions ...3 Functions ...7 Product Specifications ...10 Dimensions ...11 Wiring Diagram...15 Operation Details ...17 Installation of Indoor, Outdoor Unit...23 Test Running ...25 Troubleshooting Guide ...27 Exploded View and Replacement Parts List...41 –2–... -
Page 3: Safety Precautions
Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury. - Page 4 Authorized Service Center. • There is risk of fire, electric shock, explosion, or injury. Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open.
- Page 5 Do not store or use flammable gas or combustibles near the product. • There is risk of fire or failure of product. l i n G a s o Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) •...
- Page 6 Keep level even when installing the product. • To avoid vibration or water leakage. 90˚ I Operational Use a soft cloth to clean. Do not use harsh detergents, solvents, etc. • There is risk of fire, electric shock, or damage to the plastic parts of the product.
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Page 7: Functions
Functions Indoor Unit Power Switch ON/OFF Operation Mode Control • Cooling, Heating, Soft Dry, Fan Indoor Fan Speed Control • High, Med & Low Room Temperature control • Maintains the room temperature in accordance with the Setting Temp. • Up: up to 30°C(86.0°F) •... -
Page 8: Remote Control
Remote Control Operation ON/OFF Cooling Operation Mode Heating Operation Mode Sot Dry Operation Mode • Intermittent operation of fan at low speed. Fan Operation • Used to circulate room air without cooling. Timer Control • OFF Timer (1, 2, 3,...7 hour) Airflow Direction Control •... - Page 9 Outdoor Unit Deice Control (Heating Model Only) • De-ice PCB Outdoor Fan Speed Control • One speed Sensing Heat Exchanger Temperature • Heat exchanger temperature sensor (Thermistor) –9–...
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Page 10: Product Specifications
Product Specifications MODEL POWER SOURCE (ø, V, Hz) COOLING CAPACITY BTU/h INPUT CURRENT HEATING CAPACITY BTU/h INPUT CURRENT MAKER TYPE COMPRESSOR MODEL CAPACITY BTU/h CURRENT INPUT NOISE INDOOR dB(A) LEVEL(1m) OUTDOOR INDOOR (CFM) VOLUME OUTDOOR REFRIGERANT R-22 kg(Oz) HEAT INDOOR R/C/FPI EXCHANGER OUTDOOR... -
Page 11: Dimensions
Dimensions Indoor Unit: LPNC303R20 (LF300CP) Cool air outlet(2 sides) by Manual operation Cool air outlet(front side) Top/Bottom Airflow Controller Left/Right Airflow Controller Sliding Clean Door Display Panel Antibiotic Filter Air Inlet Outdoor Unit : LPUC303R20 (LF300CP) Bottom Panel Ground Terminal Control Cover Air Inlet(back side) Air Outlet... -
Page 12: Indoor Unit
Indoor Unit Outdoor Unit 570mm(22.4inch) 311mm(12.2inch) Items Control Display Air outlet vent Air inlet vent 546mm(21.5inch) 870mm(34.3inch) Items Gas side service valve (Ø 15.88mm(5/8inch)) Liquid side service valve (Ø 9.52mm(3/8inch)) Fan cover Earth screw Connecting cable hole –12– 320mm(12.6inch) - Page 13 Indoor Unit : LPNC483TA0 (LF480CE) Air Outlet Vent Remote Signal Receptor Air Intake Vent door Unit : LPUC483TA0 (LF480CE) Air Outlet Air Intake Vent (Rear) Vent –13– Piping...
- Page 14 Indoor Unit 486mm(19.1inch) 590mm(23.2inch) Outdoor Unit 130mm(5.1inch) 130mm(5.1inch) 130mm(5.1inch) 439mm(17.3inch) 338mm(13.3inch) Items Air Outlet Vent Air Inlet Vent Control display 370mm(14.6inch) 125mm(4.9inch) 90mm(3.5inch) 460mm(18.1inch) 460mm(18.1inch) 640mm(25.2inch) 900mm(35.4inch) Items Air Outlet Vent Liquid Side SVC Valve(Ø 9.52mm(3/8inch)) Gas Side SVC Valve(Ø 19.05mm(3/4inch)) Control Box Earth Screw –14–...
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Page 15: Wiring Diagram
Wiring Diagram 1. LF300CP(LP-C303R20) Outdoor –15–... - Page 16 2. LF480CE(LP-C483TA0) Outdoor –16–...
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Page 17: Operation Details
Operation Details 1. Time Delay Safety Control 3min The compressor is ceased for 3 minutes to balance the pressure in the refrigeration cycle. (Protection of compressor) 3sec The indoor fan is ceased for 3 seconds to prevent relay noise. (Protection of fan relay and micro chip) 30sec The 4-way valve is ceased for 30 sec. -
Page 18: Heating Mode Operation
5. Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following. Intake Air Temp. Setting Temp. +1°C(1.8°F) (Compressor OFF) Setting Temp. (Compressor ON) Setting Temp. -1°C(1.8°F) Start Indoor Fan Speed Compressor •... - Page 19 6. Hot-Start Control • The indoor fan stops until the evaporator piping temperature will be reached to 28°C(82.4°F). • During heating operation, if piping temperatures fall below 26°C(78.8°F) fan stops. • The operation diagram is as following. INDOOR PIPE TEMP. 28°C(82.4°F) 26°C(78.8°F) INDOOR FAN...
- Page 20 Air purifying operating 11. Child Lock function This function is to operate Air conditioner only by Remocon. The procedure is as the following 1st: Press the 2 buttons of the temperature control simultaneously, to raise-to lower on the Display Panel of the product for more 3 seconds.
- Page 21 12. Alarm mode display / only displayed while operating. CO : The sensor for sensing room temperature is open or short. C1 : The sensor for sensing piping temperature is open or short. 13. Energy Saving ➀ If setting temperature of starting energy saving operation is under 22°C(71.6°F), first, setting temperature it up to 22°C(71.6°F) and perform energy saving operation.
- Page 22 3. Setting the set temperature when heating operation. Room temperature < Set temperature: to be set to the previous set temperature. Room temperature ≥ Set temperature a) Room temperature ≤ 20°C(68.0°F)(: to be set to 23°C(73.4°F) b) 21°C(69.8°F) ≤ Room temperature ≤ 25°C(77.0°F): to be set to 26°C(78.8°F) c) 26°C(78.8°F) ≤...
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Page 23: Installation Of Indoor, Outdoor Unit
Installation of Indoor, Outdoor Unit 1. Selection of the best location 1) Indoor unit • There should not be any heat source or steam near the unit. • There should not be any obstacles to prevent the air circulation. • A place where air circulation in the room will be good. -
Page 24: Indoor Unit Installation
If there is any vibration transmitted to the building, mount the rubber underneath the outdoor unit. 4. Refrigerant amount Before shipment, this air conditioner is filled with the rated amount of refrigerant including additional amount required for air-purging, subject to 7.5m(25ft) piping length. (The rated amount of refrigerant is indicated on the name plate.) But... -
Page 25: Test Running
Test running 1. PRECAUTIONS IN TEST RUN • The initial power supply must provide at least 90% of the rated voltage. Otherwise, the air conditioner should not be operated. Carry out the test run more than 5 minutes without fail. Caution (Test run will be cancelled 18 minutes later automatically) •... -
Page 26: Hand Over
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 the inside of control box cover. -
Page 27: Troubleshooting Guide
Troubleshooting Guide Check power source. Check control switch setting. Compressor only fails to start Drop of power voltage Defect of compressor capacitor Capacitor check Replacement ( Ω ) Irregular motor resistance ( Ω ) Irregular motor insulation Replacement of compressor Failures to Start Electric heater is not energized Loose terminal connection. - Page 28 PACKAGE AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING 380 V 220 V 380 - 415 V No cooling and heating operation performed WHAT TROUBLED Other parts than the unit Electric supply interrupted Defective power wiring Cut of power fuse Too low voltage...
- Page 29 3) Only outdoor fan does not work WHAT TROUBLED Motor Over-heated Layer short Electric Wiring Open wire on operation Short circuited on operation 4) Only compressor does not work WHAT TROUBLED Magnetic switch for Defective contact, compressor motor magnetic coil troubled. Compressor motor Troubled over-heated (layer short)
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Page 30: The Units Discontinue After The Operation Started
The Units discontinue after the operation started WHAT TROUBLED Other parts than the unit Improper opening of the service valves in the refrigerant line Outdoor coil Coil is dirty *1 In-condensable gas Air intruded into the refrigerant pipe line *1 blended. -
Page 31: The Unit Is Working, But Not Cooling And Heating Sufficiently
The unit is working, but not cooling and heating sufficiently (Both blower and compressor are working) WHAT TROUBLED Load Much heat load Air flow Obstacle disturbs Intake of uniform wind. Short air volume Reverse rotation of blower. Refrigerant Shortage in the charged refrigerant. - Page 32 WHAT TROUBLED COMPLAINTS Electric troubles Defective contact. (Magnetic Defective contact point. contactor) Rusting and faults in the iron core contact face. Defective contact of the operating switch. Others Improper installation Trouble checking by protection devices Fault High Discharge Condenser cooling air extremely hot or insufficient air flow through the condenser Inside of the condenser tube is clogged.
- Page 33 Fault Discharge pressure is lower than standard. Single or three phases running. High or low voltage or phase unbalance. Internal Refrigerant short charge or leakage. Thermostat Cut-Off Compressor frequently stops and starts. Discharge and suction pressure are extremely high. High or low voltage, or phase unbalance. Overcurrent Relay for Single or three phases running...
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Page 34: Electronic Parts Troubleshooting Guide
Electronic Parts Troubleshooting Guide 1) No cooling operation performed. Is the AC220V (AC 240 V) between Connector(CN- outunit) Pin 1 and Pin 3 of Is the unit operating? ON/OFF S/W ON Is it Cooling mode? Room temp, > Set temp? Is the DC5V at 14 pin of MICOM Replacement IC02M, RY-COMP... - Page 35 2-1) Indoor fan does not operate Is the unit operating? Is the DC5V at 20pin of (MICOM)? Is the DC12V at each terminal RY-S/High Coil Replacement ICO3M Is the AC220V(240V) between "C" and "S/High" of P.C.B? Replacement S/High Check the motor winding Reset the power ON/OFF S/W Is the DC5V at 21pin of...
- Page 36 3) Airflow Direction does not operate. Is the unit operating? Is the Auto Swing S/W "ON"? Is the DC5V at 16 terminal? (MICOM) Is the DC12V at each terminal? (RY-Sync COIL) Is the AC220V(240V) at each terminal (SYN. MOTOR CONNECTOR)? Check the synchronous motor winding.
- Page 37 4) Remote control does not operate. Is the battery of remote controller normal? Is the CN-Disp1 connector normal? Does the operation of remote controller properly? Is the Pre-amp of display normal? Replacement MICOM –37– Replacement battery Check the connector. CN-Disp1 Replacement remote-controller Replacement preamp assy...
- Page 38 5) The unit does not operate. Is the AC220V (240V) at Trans input terminal? Is the AC12-18V at Trans (2nd)? Is the connector of Main/Display correct? Is the DC5V between PIN64 and PIN 32 of MICOM? Replacement Main PCB ASM 6) Timer control does not operate.
- Page 39 7) No heating operation works (AC 240 V) between connector (CN-outunit) Pin 1 and Pin 3 of Is the unit operating? ON/OFF S/W ON Is it heating mode? Room temp <Set temp? at 14 pin of Micom terminal at 18 pin of Micom terminal Is the DC12V at each terminal? (RY-4way COIL)
- Page 40 8) No heater operation works Is the heating operating? Is the Compressor operating? Is the Heat S/W of Main PCB "ON"? Is the DC 5V at 15 pin of MICOM Is the DC 12V at eack terminal? (RY-Heater COIL) Is the AC220V (AC 240 V) between connector(HEATER) and CN-outunit Pin 1 of Main P.C.B...
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Page 41: Exploded View And Replacement Parts List
Exploded View and Replacement Parts List 1. Indoor Unit • Model : LF300CP(LP-C303R20) 137211 235811-1 132100 235512 235811-2 249941 267110 W0CZZ 249951 135313-2 268711-1 268711-2 159830 237201 135313-1 –41–... - Page 42 W4811-2 354210 W4811-1 Eva-out 567480-3 35211A 35211C 336610 336600 352150 349480 Inlet-air 567480-1 337000 140570 359012 W1WE W1NF W52103 W4810-2 W4810-1 346810 730700 –42– 135515 130911 266000 159830-1...
- Page 43 • Model : LF480CE(LP-C483TA0) 135310 146811 135080-2 135080-1 267110 146812 137211 268711-1 567480-1 Inlet-air W4811 268711-3 Eva-out 567480-3 W4810-2 135080-3 552111 237202 354210 35211A 35211C W4810-1 330870 152302 135080-4 135313 –43–...
- Page 44 135515 249951 249941 268711-2 W4810 135500 130911 W0CZZ 359012 336610 346810 349480 135317 150170 349600 130400 –44–...
- Page 45 2. Outdoor Unit • Model : LF300CP(LP-C303R20) –45–...
- Page 46 • Model : LF480CE(LP-C483TA0) –46–...
- Page 47 December, 2006 P/No.: 3828A20156T Printed in Korea...