LG L5004R Service Manual Download Page 27

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Troubleshooting Guide

Is Temp.

setting set lower than Room

Temp.-0.5

Is the voltage No.10

of IC01M 0V?

• Exchange IC01M.

• Set the Temp. setting to lower Temp.

• Wait 3 Minutes

Is the Unit for 3 minutes

delay?

• Exchange MAIN

P.W.B Ass'y.

Is the voltage N0.7 of

IC01M DC 5V?

• Check the RY-COMP.

• Check the wiring

Diagram.

YES

Possible Trouble 2

• The compressor does not operate.

Is the wire connection of

RY-COMP all right?

• Check the RY-COMP.

• Connect LEAD Wire to

RY-COMP again.

YES

Possible Trouble 3

• The compressor always operate.

• Exchange IC01M.

Is the voltage NO.1 or 4

of IC01M DC 5V?

Is the voltage NO.13 or 16

of IC01M 0V?

• Check the RY-Hi or

RY-Lo.

• Check the wiring diagram.

YES

Possible Trouble 4

• Fan does not operate.

Service Manual

Summary of Contents for L5004R

Page 1: ...LG Room Air Conditioner SERVICE MANUAL LG CAUTION website http www lgservice com BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE PERSONNEL MODEL L5004R ...

Page 2: ...ontents 10 How to Secure the Drain Pipe 11 Operation 12 Feature 12 About the Controls of the Air Conditioner 13 Disassembly 14 Mechanical Parts 14 Air Handling Parts 15 Electrical Parts 16 Refrigerating Cycle 17 Schematic Diagram 20 Circuit Diagram 20 Electronic Control Device 21 Components Location For Main P W B ASM 22 Troubleshooting Guide 23 Piping System 23 Troubleshooting Guide 24 Exploded V...

Page 3: ...ous injury This symbol indicates the possibility of injury or damage to property only This symbol indicates the possibility of death or serious injury This symbol indicates the possibility of injury or damage to property only This symbol indicates the possibility of death or serious injury This symbol indicates the possibility of injury or damage to property only WARNING Installation Always instal...

Page 4: ...ause electric shock or fire Do not damage or use an unspecified power cord It will cause electric shock or fire 4 Room Air Conditioner Safety Precautions Plug in the power plug prop erly Otherwise it will cause electric shock or fire Do not operate or stop the unit by inserting or pulling out the power plug It will cause electric shock or fire Do not damage or use an unspecified power cord It will...

Page 5: ...ct service center after taking the power plug ut from the socket Water may enter the unit and degrage the insulation It may cause an electric shock CAUTION Installation There is risk of fire or electric shock Never touch the metal parts of the unit when removing the filter They are sharp and may cause injury Do not block the inlet or out let It may cause failure of appliance or performance deterio...

Page 6: ... installing It may cause injury Hold the plug by the head when taking it out It may cause electric shock and damage Unplug the air conditioner if it will not be used for a long period It will waste power consumption in vain and it may cause accident Sharp edges Always insert the filter securely Clean it every two weeks Operation without filters will cause failure Use a soft cloth to clean Do not u...

Page 7: ...83 11 1 8 D mm inch 326 12 13 16 Model Dimension All Model Outside Dimensions This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that could cause harm to the air conditioner This symbol indicates special notes NOTICE Symbols Used in this Manual ...

Page 8: ...S COOLING CAPACITY BTU h 5 050 POWER SUPPLY Phase V Hz 1ø 115V 60HZ INPUT W 520 OPERATING CURRENT AMP 4 8 REFRIGERANT CONTROL CAPILLARY TUBE REFRIGERANT CHARGE R 22 205g 7 2 Oz INSIDE FAN TURBO OUTSIDE FAN ROPELLER FAN WITH SLINGER RING AIR DISCHARGE 2 WAY RIGHT AND LEFT CHASSIS TOP DOWN PROTECTOR TEMPERATURE CONTROL THERMISTOR OVERLOAD PROTECTOR FOR COMPRESSOR INTERNAL PROTECTOR FOR FAN MOTOR MOD...

Page 9: ...IP MOUNTED ON TOP OF INNER SILL is more than 1 two of wood strip are not necessary NOTICE Installation Installation Select the Best Location How to Install This air conditioner is designed with a button down chassis so it can be easily installed in a window 1 To prevent vibration and noise make sure the unit is installed securely and firmly 2 Install the unit where the sun does not shine directly ...

Page 10: ... line with pencil on the center of the inner sill as shown in Figure 6 2 Attach L Bracket a Install the L brackets behind the inner window sill with the short side of bracket as shown Use the 2 screws TYPE A provided b The bracket helps to hold unit securely in place Be sure to place bracket edge flush against back of inner sill See Figure 7 HARDWARE TYPE F 1EA SASH SEAL Not adhesive backed TYPE E...

Page 11: ...ng 2 screws TYPE B 2 screws TYPE C to secure them as shown in Figure 10 5 Install the Sash Seal and Sash Lock a Cut the sash seal TYPE F to the window width Stuff the sash seal between the glass and the window to prevent air and insects from getting into the room as shown in Figure 10 b Fasten the L bracket using a TYPE A screw as shown in Figure 10 6 Window installation of room air conditioner is...

Page 12: ...n 2 pins black and white 2 The grounding conductor green or green and yellow is to be open 3 Measure the resistance value with an ohm meter between the jumpered lead and each exposed metallic part on the equipment at all positions except Off of the ROCKER SWITCH 4 The value should be over 1 MΩ Operation Auto Swing Power Temp Fan Speed Timer Mode CAUTION The Remote Controller will not function prop...

Page 13: ......

Page 14: ...5 4 Lift the cabinet from the unit 5 Re install by referring to the procedures above 3 CONTROL PANEL 1 Disconnect the unit from the power source 2 Remove the front grille Refer to Section 1 3 Remove the cabinet Refer to Section 2 4 Remove 2 screws that secure the control panel to control box and base pan See Figure 16 5 Pull the control board toward yourself Controls wires and capacitor are now ac...

Page 15: ...fer to Section 3 5 Remove the air guide upper Refer to Section 4 6 Remove 2 screws that secure the condenser to the base pan 7 Remove the screw that secures the shroud to channel of condenser 8 Press the snap area of shroud with your thumbs This allows you to remove it from the condenser 9 Remove 1 screw that secure the evaporator to the base pan See Figure 19 10 Remove the orifice by pushing the ...

Page 16: ...8 Remove 2 screws that secure the shroud to the base pan See Figure 23 9 Lift air guide lower and shroud upward See Figure 23 10 Re install by referring to the procedures above 8 OVERLOAD PROTECTOR 1 Remove the front grille and cabinet Refer to Section 1 2 2 Remove the nut which fastens the terminal cover 3 Remove the terminal cover 4 Remove all the leads from the overload protector 5 Remove the o...

Page 17: ...ser connections 5 Remove the condenser 6 Re install by referring to the procedures above 10 CAPACITOR 1 Remove the cabinet Refer to Section 2 2 Remove the control panel Refer to Section 3 3 Discharge the capacitor by placing a 20 K resistor across the capacitor terminals 4 Remove all the leads of capacitor terminals 5 Re install the components by referring to the removal procedure above See Figure...

Page 18: ...n slowly with the two full turns counter clockwise This will keep oil from foaming and being drawn into the vacuum pump 6 3 Operate the vacuum pump for 20 to 30 minutes until 600 micron vacuum is obtained Close valves A and B and observe vacuum gauge for a few minutes A rise in pressure would indicate a possible leak or moisture remaining in the system With valves A and B closed stop the vacuum pu...

Page 19: ...f seal leak detector tubing cutter hand tools to remove components and service valve B A B A B A COMPOUND GAUGE SEE INSETS BELOW CAPILLARY TUBE EVAPORATOR LOW PRESSURE SIDE COMPRESSOR CONDENSER HIGH PRESSURE SIDE EXTERNAL VACUUM PUMP LO HI CHARGING CYLINDER MANIFOLD GAUGE C Figure 31A Pulling Vacuum Figure 31B Charging Service Manual 19 ...

Page 20: ...gram Schematic Diagram Circuit Diagram DESCRIPTION NAME FAN MOTOR MAIN PCB DISPLAY TERMITOR COMPRESSOR POWER CORD ASSY CAPACITOR OVERLOAD PROTECTOR Q TY 1 1 1 1 1 1 1 1 REF NO 1 2 3 4 5 6 7 8 20 Room Air Conditioner ...

Page 21: ...G f SEG e 44 SEG d TMP87CH47U MICOM 4 SEG b SEG a SEG c 3 2 1 7 6 5 Room TH Option2 Option1 Pipe TH 23 26 25 24 SYNC LOW 4WAY COMP 20 21 22 Reset Osc out Osc in 16 VAref VSS 18 19 17 13 14 15 TEST 11 SCL SDA 10 9 8 Tx 12 Rx 5V A1 3 4 GND SDA SCL A2 A0 1 2 EEPROM CAT93C46 SMW250 02 1 1 2 2 CN TH1 5V R01B R02H R01H 1 6 2K 1 12 1K RT8 00MG 1M OSC01B 50V C01A 0 01 C02A 1uF 10V 3 20K R01A 6 10 AIR PURI...

Page 22: ...Components Location For Main P W B ASM Trouleshooting Glwide 22 Room Air Conditioner ...

Page 23: ...DISCHARGED AIR MOTOR COMPRESSOR ROOM AIR HEAT LOAD CAPILLARY TUBE LIQUID REFRIGERANT LIQUID OUTLET VAPOR INLET COMPLETE LIQUID BOIL OFF POINT SUCTION LINE COOL LOW PRESSURE VAPOR LIQUID PRESSURE DROP DISCHARGE LINE NOT HIGH PRESSURE VAPOR OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH EVAPORATOR COILS CONDENSER COILS ROOM AIR CONDITIONER CYCLE OF REFRIGERATION HIGH PRESSURE VAPOR LIQUID REFRIGER...

Page 24: ...f inlet outlet air 44 50 F 7 10 C Replacement of unit if the unit is beyond repair Check outdoor coil heat exchanger and fan operation Check heat load increase Check cold air circulation for smooth flow Check gas leakage Clean condenser Not on separate circuit Check inside gas pressure Adjust refrigerant charge Malfunction of compressor Replacement of compressor Check clogging in refrigera tion ci...

Page 25: ...ressor capacitor Replacement of compressor Motor damaged Irregular motor insulation Ω Irregular motor resistance Ω Check of circuit breaker and fuse Gas leakage of feeler bulb of thermostat Check control switch Fan only fails to start Improper wiring Defect of fan motor capacitor Replacement of fan motor Regular but fails to start Replacement of compressor Locking of piston metal Irregular motor r...

Page 26: ...02D DC 5V Is the voltage No 18 of Micom DC 5V Exchange Main P W B Ass y Is the connection between Main and Display all right Is the reset circuit all right The No 14 of Micom is 5V Check the Fuse Check the wiring diagram Check the Main P W B pattern Exchange the Trans Exchange D02D D05D Exchange IC01D Exchange IC02D Exchange IC01A Connect connector exactly Check the P W B pattern NO NO NO NO NO NO...

Page 27: ...k the wiring Diagram NO NO NO NO YES YES YES YES Possible Trouble 2 The compressor does not operate Is the wire connection of RY COMP all right Check the RY COMP Connect LEAD Wire to RY COMP again NO YES Possible Trouble 3 The compressor always operate Exchange IC01M Exchange IC01M Is the voltage NO 1 or 4 of IC01M DC 5V Is the voltage NO 13 or 16 of IC01M 0V Check the RY Hi or RY Lo Check the wir...

Page 28: ...to CN DISP1 exactly NO NO NO YES YES YES Possible Trouble 5 Romote controller does not operate NO NO NO NO YES YES YES Is the IC01G all right Is the connection of CN DISP1 all right Exchange the display P W B Ass y Exchange IC01G Exchange Q01G Q02G Q03G Q04G Connect connector to CN DISP1 exactly Does the Q01G Q02G Q03G Q04G operate normally on main P W B Ass y Possible Trouble 6 It displays abnorm...

Page 29: ...or Discharge Test capacitor capacitor before testing Replace if not within 10 of manufacturer s rating Replace if shorted open or damaged Will not rotate Fan blade hitting shroud or blower wheel hitting scroll Re align assembly Units using slinger ring condenser fans must have 0 22 0 25 inch clearance to the base If necessary shim up the bottom of the fan motor with mounting screw s Check fan moto...

Page 30: ...efer to the wiring diagram for terminal identification Replace the switch if the circuit is open Thermostat Check the position of knob If not at the coldest setting advance the knob to this setting and restart the unit Check the continuity of the thermostat Replace the thermostat if the circuit is open Capacitor discharge Check the capacitor capacitor before Replace if not within 10 of manufacture...

Page 31: ...causing the compressor to cycle Straighten the fins or replace the coil Capacitor Test the capacitor Wiring Check the terminals If loose repair or replace Refrigeration system Check the system for a restriction Insufficient cooling Air filter If restricted clean or replace Unit undersized Determine if the unit is properly sized for the area to be cooled Excessive noise Turbo Fan or Axial Fan Check...

Page 32: ...2113 35211A 567502 554160 550140 352410 130410 W48602 148000 130910 559010 552113 554030 152302 159900 1 159900 1 159900 2 352380 1 352380 2 135312 249950 359012 149980 346811 731373 W48602 Auto Swing Power Temp Fan Speed Timer Mode 32 Room Air Conditioner ...

Page 33: ...ER 6727AQ9142P 238712 PWB PCB ASEMBLY DISPLAY 6871A20449A 268714 PWB PCB ASSEMBLY MAIN 6871A10129A 346811 MOTOR ASSEMBLY SINGLE 4681A20116E 349480 ORIFICE 4948A20031B 352113 TUBE ASSEMBLY DISCHARGE 5211A21136A 352115 TUBE ASSEMBLY EVAPORATOR IN 5211A25019A 35211A TUBE ASSEMBLY SUCTION SINGLE 5211A21228B 352380 1 AIR GUIDE 5238A10026A 352380 2 AIR GUIDE 5238A10025A 352410 EVAPORATOR ASSEMBLY FIRST ...

Page 34: ...P No 3828A20472D February 2004 Printed in China ...

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LG L5004R, Service Manual

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