LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) Service Manual

[Page 1] LG LF300CP(LP-C303R20), LF480CE(L

Floor Standing Type Air Conditioner SERVICE MANUAL MODEL: LF300CP(LP-C303R20) LF480CE(LP-C483TA0) ...

[Page 2] LG LF300CP(LP-C303R20), LF480CE(L

Contents –2– Safety Precautions..................................................................................................................3 Functions ............................................................................................

[Page 3] LG LF300CP(LP-C303R20), LF480CE(L

–3– Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. ■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by...

[Page 4] LG LF300CP(LP-C303R20), LF480CE(L

–4– ■ Operational Do not install, remove, or re- install the unit by yourself (customer). • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpacking and installing the product. • Sharp edges could cause injur...

[Page 5] LG LF300CP(LP-C303R20), LF480CE(L

–5– ■ Installation Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) • There is risk of physical injury, electric shock, or product failure. Be cautious that wate...

[Page 6] LG LF300CP(LP-C303R20), LF480CE(L

–6– Keep level even when installing the product. • 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 clean. Do not use harsh detergents, solvents, etc...

[Page 7] LG LF300CP(LP-C303R20), LF480CE(L

–7– Indoor Unit Power Switch ON/OFF Operation Mode Control Indoor Fan Speed Control Room Temperature control Sensing Heat Exchanger Temperature Soft Dry Operation Mode Time Delay Safety Control AutoRestart • Cooling, Heating, Soft Dry, Fan • ...

[Page 8] LG LF300CP(LP-C303R20), LF480CE(L

–8– • Intermittent operation of fan at low speed. • Used to circulate room air without cooling. • OFF Timer (1, 2, 3,......7 hour) • Airflow direction Auto-swing and Manual Contol. • Up: up to 30°C(86.0°F) • Down: down to 16°C(60.8...

[Page 9] LG LF300CP(LP-C303R20), LF480CE(L

–9– Outdoor Unit Deice Control Outdoor Fan Speed Control Sensing Heat Exchanger Temperature • De-ice PCB (Heating Model Only) • One speed • Heat exchanger temperature sensor (Thermistor) ...

[Page 10] LG LF300CP(LP-C303R20), LF480CE(L

Product Specifications –10– POWER SOURCE (ø, V, Hz) COOLING CAPACITY BTU/h W INPUT W CURRENT A HEATING CAPACITY BTU/h W INPUT W CURRENT A MAKER TYPE COMPRESSOR MODEL CAPACITY BTU/h CURRENT A INPUT W NOISE INDOOR dB(A) LEVEL(1m) OUTDOOR AIR INDOO...

[Page 11] LG LF300CP(LP-C303R20), LF480CE(L

–11– 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 Air Inlet Antibiotic Filter Plasma Deodorant A...

[Page 12] LG LF300CP(LP-C303R20), LF480CE(L

Indoor Unit Outdoor Unit –12– 800mm(31.5inch) 180mm(7.1inch) 101mm(4.0inch) 370mm(14.6) 340mm(13.4inch) 95mm 870mm(34.3inch) 320mm(12.6inch) 546mm(21.5inch) 5 3 1 2 4 1820mm(71.7inch) 570mm(22.4inch) 311mm(12.2inch) 180mm(7.1inch) 101mm(4.0inc...

[Page 13] LG LF300CP(LP-C303R20), LF480CE(L

Air Intake Vent (Rear) Air Outlet Vent Piping Air Outlet Vent Remote Signal Receptor Air Intake Vent –13– Indoor Unit : LPNC483TA0 (LF480CE) door Unit : LPUC483TA0 (LF480CE) ...

[Page 14] LG LF300CP(LP-C303R20), LF480CE(L

–14– Indoor Unit Outdoor Unit 370mm(14.6inch) 125mm(4.9inch) 210mm(8.3inch) 210mm(8.3inch) 290mm(11.4inch) 290mm(11.4inch) 1220mm(48.0inch) 460mm(18.1inch) 460mm(18.1inch) 505mm(19.9inch) 505mm(19.9inch) 90mm(3.5inch) 130mm(5.1inch) 130mm...

[Page 15] LG LF300CP(LP-C303R20), LF480CE(L

Wiring Diagram 1. LF300CP(LP-C303R20) Outdoor –15– ...

[Page 16] LG LF300CP(LP-C303R20), LF480CE(L

–16– 2. LF480CE(LP-C483TA0) Outdoor ...

[Page 17] LG LF300CP(LP-C303R20), LF480CE(L

–17– 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 r...

[Page 18] LG LF300CP(LP-C303R20), LF480CE(L

–18– 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. (Compressor ON) Setting Temp. -1°C(1.8°F) Indoor Fan Speed C...

[Page 19] LG LF300CP(LP-C303R20), LF480CE(L

–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 a...

[Page 20] LG LF300CP(LP-C303R20), LF480CE(L

–20– 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 ...

[Page 21] LG LF300CP(LP-C303R20), LF480CE(L

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 s...

[Page 22] LG LF300CP(LP-C303R20), LF480CE(L

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°...

[Page 23] LG LF300CP(LP-C303R20), LF480CE(L

–23– 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 goo...

[Page 24] LG LF300CP(LP-C303R20), LF480CE(L

–24– 2. Indoor Unit installation The mounting floor should be strong and solid enough to prevent it from vibration. Drill the piping hole with 2.8 inch diameter hole- core drill at either the right or the left of indoor unit. The hole should be s...

[Page 25] LG LF300CP(LP-C303R20), LF480CE(L

–25– 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. (Test run will be cancell...

[Page 26] LG LF300CP(LP-C303R20), LF480CE(L

–26– 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 the...

[Page 27] LG LF300CP(LP-C303R20), LF480CE(L

Troubleshooting Guide –27– Failures to Start Check of circuit breaker and fuse. Check control switch. Fan only fails to start Improper wiring Defect of fan motor capacitor. Irregular motor resistance ( Ω ) Irregular motor insulation ( �...

[Page 28] LG LF300CP(LP-C303R20), LF480CE(L

–28– PACKAGE AIR CONDITIONER VOLTAGE LIMITS No cooling and heating operation performed NAME PLATE RATING MINIMUM MAXIMUM 380 V 342 V 418 V 220 V 198 V 242 V 380 - 415 V 342 V 456 V 2) Only blowers do not work WHAT TROUBLED COMPLAINTS HOW TO CHEC...

[Page 29] LG LF300CP(LP-C303R20), LF480CE(L

–29– 3) Only outdoor fan does not work WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Motor Electric Wiring Over-heated Layer short Open wire on operation Short circuited on operation Check how it is insulated. Check it with a tester. Repair or r...

[Page 30] LG LF300CP(LP-C303R20), LF480CE(L

–30– Note: Use an appropriate measuring instrument for readjustment. *1: Check the High-pressure switch indication. *2: Check the Low- pressure switch indication. WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Other parts than the unit Outdoor co...

[Page 31] LG LF300CP(LP-C303R20), LF480CE(L

–31– The unit is working, but not cooling and heating sufficiently (Both blower and compressor are working) WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Load Air flow Short air volume Refrigerant Air passage Air filter Much heat load Obstacle di...

[Page 32] LG LF300CP(LP-C303R20), LF480CE(L

–32– WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Electric troubles (Magnetic contactor) Others Defective contact. Defective contact point. Rusting and faults in the iron core contact face. Defective contact of the operating switch. Improper i...

[Page 33] LG LF300CP(LP-C303R20), LF480CE(L

–33– Fault Cause Check/Correcitve Action Internal Thermostat Cut-Off Overcurrent Relay for Compressor Cut-Off Overcurrent Relay for Fan Motor Cut-Off Fuse Blown Disconnection and Faulty Contact Discharge pressure is lower than standard. Single o...

[Page 34] LG LF300CP(LP-C303R20), LF480CE(L

–34– 1) No cooling operation performed. YES YES NO NO NO NO NO NO YES YES YES YES Is the AC220V (AC 240 V) between Connector(CN- outunit) Pin 1 and Pin 3 of Main P.C.B ON/OFF S/W ON Is the unit operating? Is the input power AC220V (AC240V) at...

[Page 35] LG LF300CP(LP-C303R20), LF480CE(L

–35– 2-1) Indoor fan does not operate YES YES YES YES YES YES YES YES YES YES NO NO NO NO NONONO NO NO NO Is the unit operating? Is the DC5V at 20pin of (MICOM)? Is the DC5V at 21pin of (MICOM)? Is the DC5V at 22pin of (MICOM)? Is the DC1...

[Page 36] LG LF300CP(LP-C303R20), LF480CE(L

–36– 3) Airflow Direction does not operate. YES NO YES NO YES NO YES NO YES NO 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) Check the synchronou...

[Page 37] LG LF300CP(LP-C303R20), LF480CE(L

–37– 4) Remote control does not operate. YES NO YES NO YES NO YES NO Is the battery of remote controller normal? Check the connector. CN-Disp1 Is the CN-Disp1 connector normal? Does the operation of remote controller properly? Is the Pre-amp...

[Page 38] LG LF300CP(LP-C303R20), LF480CE(L

–38– 5) The unit does not operate. YES NO YES NO YES NO YES NO 6) Timer control does not operate. Replacement Micom Is the AC220V (240V) at Trans input terminal? Is the AC12-18V at Trans (2nd)? Is the connector of Main/Display correct? Is the...

[Page 39] LG LF300CP(LP-C303R20), LF480CE(L

–39– 7) No heating operation works YES YES NO NO NO NO NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES YES ON/OFF S/W ON Is the AC220V (AC 240 V) between connector (CN-outunit) Pin 1 and Pin 3 of Main P.C.B Is the input power AC220V (AC2...

[Page 40] LG LF300CP(LP-C303R20), LF480CE(L

–40– 8) No heater operation works YES NO YES NO YES NO YES NO YES NO YES NO Is the heating operating? Is the Compressor operating? Is the Heat S/W of Main PCB "ON"? Heat S/W "ON" Replacement MICOM Replacement ICO2M Replacem...

[Page 41] LG LF300CP(LP-C303R20), LF480CE(L

Exploded View and Replacement Parts List –41– 267110 237201 135313-1 135313-2 235811-2 235811-1 137211 132100 235512 249941 268711-1 249951 159830 W0CZZ 268711-2 1. Indoor Unit • Model : LF300CP(LP-C303R20) ...

[Page 42] LG LF300CP(LP-C303R20), LF480CE(L

–42– 130911 35211C 354210 W4811-1 567480-3 Eva-out 336610 W4810-1 730700 346810 359012 W1NF 140570 W1WE 349480 567480-1 Inlet-air 159830-1 337000 266000 352150 336600 W4810-2 W4811-2 135515 W52103 35211A ...

[Page 43] LG LF300CP(LP-C303R20), LF480CE(L

–43– 268711-3 268711-1 567480-1 Inlet-air 567480-3 Eva-out W4810-2 137211 237202 35211A 35211C 152302 135313 330870 146812 W4810-1 354210 552111 W4811 267110 135080-2 135310 146811 135080-1 135080-3 135080-4 • Model : LF480CE(LP-C483TA0) ...

[Page 44] LG LF300CP(LP-C303R20), LF480CE(L

–44– 359012 346810 150170 130400 349480 135317 135500 268711-2 249941 249951 W4810 W0CZZ 336610 135515 130911 349600 ...

[Page 45] LG LF300CP(LP-C303R20), LF480CE(L

2. Outdoor Unit • Model : LF300CP(LP-C303R20) –45– 435512 437210 349480-1 447910 559010 546810 349600 W0CZZ-2 W0CZZ-1 W6920 W5210D 552113 552201 554160-1 554160-2 552200 661400 649950 554030 137213-1 435300 137213-2 435511 552203-1 552203-2 4...

[Page 46] LG LF300CP(LP-C303R20), LF480CE(L

–46– • Model : LF480CE(LP-C483TA0) 437212 435512 435301 437210 559010 137213 435511 546810 447900 554031 552203-2 552203-1 430411 349600-1 W5210D 554160 552112 552201 552200 661400 552113 649950 W0CZZ-1 268711-4 567480-4 Air Accum. 548490 ...

[Page 47] LG LF300CP(LP-C303R20), LF480CE(L

P/No.: 3828A20156T December, 2006 Printed in Korea ...