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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 1
Floor Standing T ype Air Conditioner SER VICE MANU AL MODEL: LF300CP(LP-C303R20) LF480CE(LP-C483T A0) ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 2
Contents –2– Safety Precautions ..................................................................................................................3 Functions ............................................................................................................................... ..7 Product Specifications ................................. ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 3
–3– Safety Precautions T o prev ent injur y to the user or other people and proper ty damage, the f ollowing instructions must be f ollow ed. ■ 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 manual are as shown belo w ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 4
–4– ■ Operational Do not install, remove, or re- install the unit by y ourself (customer). • There is risk of fire, electric shock, e xplosion, or injur y . Be cautious when unpacking and installing the product. • Shar p edges could cause injury . Be especially careful of the case edges and the fins on the condenser and e vapor ator . For ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 5
–5– ■ 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 product f ailure. Be cautious that water could not enter the product. • There is risk of fire, electric shock, or product damage. Alw ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 6
–6– Keep le vel even when installing the pr oduct. • T o av oid vibration or w ater leakage. Use two or more people to lift and transport the product. • A v oid personal injur y . Use a soft cloth to c lean. Do not use har sh detergents, solvents, etc. • There is risk of fire, electric shock, or damage to the plastic par ts of the product ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 7
– 7 – Indoor Unit P ower Switc h ON/OFF Operation Mode Control Indoor Fan Speed Contr ol Room T emperature control Sensing Heat Exchanger T emperature Soft Dry Operation Mode Time Delay Saf ety Control A utoRestar t • Cooling, Heating, Soft Dr y , F an • High, Med & Low • Maintains the room temperature in accordance with the Setting T ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 8
– 8 – • Intermittent operation of fan at lo w speed. • Used to circulate room air without cooling. • OFF Timer (1, 2, 3,......7 hour) • Airflow direction A uto-swing and Manual Contol. • Up: up to 30 ° C(86.0 ° F) • Down: do wn to 16 ° C(60.8 ° F) • High, Med & Low Remote Control Operation ON/OFF Cooling Operation Mode Hea ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 9
– 9 – Outdoor Unit Deice Control Outdoor Fan Speed Contr ol Sensing Heat Exchanger T emperature • De-ice PCB (Heating Model Only) • One speed • Heat e xchanger temperature sensor (Thermistor) ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 10
Pr oduct Specifications – 10 – PO WER SOURCE ( ø , V , Hz) COOLING CAP ACITY BTU/h W INPUT W CURRENT A HEA TING CAP ACITY BTU/h W INPUT W CURRENT A MAKER TYPE COMPRESSOR MODEL CAP ACITY BTU/h CURRENT A INPUT W NOISE INDOOR dB(A) LEVEL(1m) OUTDOOR AIR INDOOR CMM V OLUME OUTDOOR (CFM) REFRIGERANT R-22 kg(Oz) HEA T INDOOR R/C/FPI EXCHANGER OUTDOO ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 11
– 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 Air Cleaner Remote Controller Holder Control Panel Top/Bottom Airflow Controller Left/Right Airflow ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 12
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(4.0inch) No . Items 1 Control Displa y 2 Air outlet vent 3 Air inlet vent No . Items 1 Gas side ser vice v ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 13
Air Intake Vent (Rear) Air Outlet Vent Piping Air Outlet Vent Remote Signal Receptor Air Intake Vent – 13 – Indoor Unit : LPNC483T A0 (LF480CE) door Unit : LPUC483T A0 (LF480CE) ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 14
– 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(5.1inch) 640mm(25.2inch) 900mm(35.4inch) 41mm(1.6inch) 41mm(1.6inch) 40mm(1.6inch) 40mm(1.6inch) 338mm(13 ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 15
Wiring Diagram 1. LF300CP(LP-C303R20) Outdoor – 15 – ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 16
– 16 – 2. LF480CE(LP-C483T A0) Outdoor ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 17
– 17 – 1. Time Delay Saf ety Control 3min The compressor is ceased f or 3 minutes to balance the pressure in the refrigeration cycle. (Protection of compressor) 3sec The indoor f an is ceased for 3 seconds to pre vent rela y noise. (Protection of f an relay and micro chip) 30sec The 4-wa y v alve is ceased f or 30 sec. to prev ent the refrigera ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 18
– 18 – 5. Heating Mode Operation The unit will operate according to the setting b y the remote controller and the operation diagram is sho wn as f ollowing. Intake Air T emp. Setting T emp. (Compressor ON) Setting T emp. -1 ° C(1.8 ° F) Indoor F an Speed Compressor ON OFF ON OFF OFF Hot Star t minimum 10sec. minimum 10sec. minimum 10sec. mini ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 19
– 19 – 6. Hot-Start Control • The indoor f an stops until the ev aporator piping temperature will be reached to 28 ° C(82.4 ° F). • During heating operation, if piping temperatures f all below 26 ° C(78.8 ° F) f an stops. • The operation diagr am is as follo wing. 7. Defrost Contr ol • Defrost operation is controlled b y timer and s ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 20
– 20 – 11. Child Lock function This function is to operate Air conditioner only b y Remocon. The procedure is as the f ollowing 1st : Press the 2 b uttons of the temperature control simultaneously , to raise-to lower on the Displa y Panel of the product f or more 3 seconds. 2nd : The buzz er sounds and then the window of Displa y P anel shows C ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 21
12. Alarm mode display / onl y displa yed while operating. CO : The sensor f or sensing room temperature is open or shor t. C1 : The sensor f or sensing piping temperature is open or shor t. 13. Energy Sa ving ➀ If setting temperature of star ting energy sa ving operation is under 22 ° C(71.6 ° F), first, setting temperature it up to 22 ° C(71 ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 22
3. Setting the set temperature when heating operation. Room temperature < Set temperature: to be set to the pre vious 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) ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 23
– 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 pre vent the air circulation. • A place where air circulation in the room will be good. • A place where drainage can be easily obtained. • A place where noise pre v ention is take ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 24
–24– 2. Indoor Unit installation The mounting floor should be strong and solid enough to pre vent it from vibr ation. Drill the piping hole with 2.8 inch diameter hole- core drill at either the r ight or the left of indoor unit. The hole should be sightly slant to the outdoor side. Inser t the plastic tube through the hole. Cut the e xtruded ou ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 25
– 25 – 1. PRECA UTIONS IN TEST RU N • The initial po wer supply must provide at least 90% of the r ated voltage . Otherwise, the air conditioner should not be operated. Carr y out the test run more than 5 minutes without f ail. (T est run will be cancelled 18 minutes later automatically) • The test run is star ted by pressing the do wn room ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 26
– 26 – CA UTION After the confir mation of the abo ve conditions , prepare the wiring as follo ws: 1) Never fail to have an individual po wer specialized for the air conditioner . As for the method of wiring, be guided by the cir cuit diagram pasted on the inside of contr ol bo x cover . 2) Pro vide a circuit breaker s witch between po wer sour ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 27
T r oubleshooting Guide – 27 – Failures to Start Check of circuit break er and fuse. Check control s witch. F an only fails to star t Improper wiring Def ect of fan motor capacitor . Irregular motor resistance ( Ω ) Irregular motor insulation ( Ω ) Replacement of f an motor . Improper electric heater Replacement of electric heater Regular b ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 28
– 28 – P A CKA GE AIR CONDITIONER V OL T A GE LIMITS No cooling and heating operation perf ormed NAME PLA TE RA TING MINIMUM MAXIMUM 380 V 342 V 418 V 220 V 198 V 242 V 380 - 415 V 342 V 456 V 2) Only b lower s do not work WHA T TROUBLED COMPLAINTS HO W T O CHECK REMED Y Other par ts than the unit Magnetic s witch for compressor & f an moto ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 29
– 29 – 3) Only outdoor fan does not w ork WHA T TROUBLED COMPLAINTS HO W T O CHECK REMED Y Motor Electric Wir ing Over-heated La yer shor t Open wire on operation Shor t circuited on operation Check ho w it is insulated. Check it with a tester . Repair or replace it. Rewiring or repair . 4) Only compressor does not w ork WHA T TROUBLED COMPLAIN ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 30
– 30 – Note: Use an appropriate measuring instr ument f or readjustment. *1: Check the High-pressure s witch indication. *2: Check the Lo w- pressure s witch indication. WHA T TROUBLED COMPLAINTS HO W T O CHECK REMED Y Other par ts than the unit Outdoor coil In-condensable gas blended. High pressure s witch Refrigerant Outdoor F an Improper ope ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 31
– 31 – The unit is w orking, but not cooling and heating sufficientl y (Both blo wer and compressor are working) WHA T TROUBLED COMPLAINTS HO W T O CHECK REMED Y Load Air flow Shor t air volume Refrigerant Air passage Air filter Much heat load Obstacle disturbs Intake of unif or m wind. Re verse rotation of blo wer . Shor tage in the charged re ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 32
– 32 – WHA T TROUBLED COMPLAINTS HO W TO CHECK REMED Y Electric troubles (Magnetic contactor) Others Def ective contact. Def ective contact point. Rusting and f aults in the iron core contact f ace. Def ectiv e contact of the operating s witch. Improper installation Checking Checking Repair and clean or replace it. Correct it. Fault Cause Check ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 33
– 33 – Fault Cause Check/Correcitve Action Internal Thermostat Cut-Off Ov ercurrent R el ay fo r Compressor Cut-Off Overcurrent Rela y for F an Motor Cut-Off Fuse Blown Disconnection and F aulty Contact Discharge pressure is lower than standard. Single or three phases running. High or low v oltage or phase unbalance. Refrigerant shor t charge o ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 34
– 34 – 1) No cooling operation performed. YES YES NO NO NO NO NO NO YES YES YES YES Is the A C220V (A C 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 A C220V (AC240V) at COMP Magnetic coil? Check the magnetic contactor of outdoor unit. Is it Cooling mode? Room temp ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 35
– 35 – 2-1) Indoor fan does not operate YES YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO 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 DC12V at each ter minal R Y - Mid Coil Is the DC12V at each ter minal R Y -S/High Coil Is the A C220V(240V) ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 36
– 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 ter minal? (R Y -Sync COIL) Check the synchronous motor winding. Replacement R Y -Sync Check synchronous connector contact point. Is the AC220V(240 ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 37
– 37 – 4) Remote control does not operate. YES NO YES NO YES NO YES NO Is the batter y of remote controller nor mal? Check the connector . CN-Disp1 Is the CN-Disp1 connector nor mal? Does the operation of remote controller properly? Is the Pre-amp of displa y nor mal? Replacement MICOM Replacement preamp assy Replacement remote-controller Repla ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 38
– 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 A C220V (240V) at T rans input terminal? Is the A C12-18V at T rans (2nd)? Is the connector of Main/Displa y correct? Is the DC5V between PIN64 and PIN 32 of MICOM? Replacement Main PCB ASM 1. Replacement ICO3D 2. Replace ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 39
– 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 (A C 240 V) between connector (CN-outunit) Pin 1 and Pin 3 of Main P .C .B Is the input power A C220V (AC240V) at COMP magnetic coil contactor? Is it heating mode? Room temp <Set temp? Is the DC5V at 1 ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 40
– 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 Replacement R Y -Heater Is the DC 5V at 15 pin of MICOM Is the DC 12V at eack terminal? (R Y -Heater COIL) Is ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 41
Exploded Vie w and Replacement P ar ts 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) ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 42
– 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 ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 43
– 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-C483T A0) ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 44
– 44 – 359012 346810 150170 130400 349480 135317 135500 268711-2 249941 249951 W4810 W0CZZ 336610 135515 130911 349600 ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 45
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 430410 435301 268711-4 548490 567480-4 552112 Air Accum. ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 46
– 46 – • Model : LF480CE(LP-C483T A0) 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 ...
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LG LF300CP(LP-C303R20), LF480CE(LP-C483TA0) - page 47
P/No.: 3828A20156T December, 2006 Printed in Korea ...
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