LG LRFC25750 French Door Refrigerator - LRFC25750xx LG 25 cu. ft. French Door Refrigerator Service Manual
Contents
1. P12 P11 P10 P67 60 P61 P62 AN2 P64 AN4 P63 AN3 38 0 7774 15 2 4 vr mo Ime Ine 14 5 STEPPING 13 10KJ 10KJ 10KJ 8 MOTOR 11 14 16 457 10 15 12 13 7 A usta BEST DISPLAY PCB R CON102 1 2 4 gt 17 9 4 3 5 gt 16 5 4 si ps 2 5 12 3 7 s hs 5 6 5 8 CONS 41 are R24 240 1 2w 1 11 In 1 9 12 40 gis pols 240 1 2 2 39 2 Po fis R266 I1 2 3 240 1 20 38 6 15 R276 3 Do 37 16 R28 4 pe vm 5 36 17 R200 9 De 240 1 2W 6 34 3 18 R30 6 De 240 1724 z 33 2 7 Do 19 32 1 20 R326 His 4 REFRIGERATOR FREEZER R35 R36 1 5 TEMP CONTROL snes TEMP CONTROL 24 1004 WARM COLD EXPRESS 102 FREEZING 19 FILTER im 30 R37 11 ccu 2 REFRIGERATOR DOOR SWITCH 223 o CONG 23 R39 16 2 8 gt 2KJ co L m 7 FREEZER SENSOR R40 HS 50 sa 24 ele L REFRIGERATOR SENSOR 12 15 25 A 26 1KF 4 ex con mA 3 DEFROST SENSOR Ps is 50V 27 R434 coe 2 2 O FREEZER DOOR SWITCH 223 T 12. Ner 7 R39 16 2KF Peo 23 L em 2 FREEZER SENSOR 223 T RRI 7 61 24 44 6 2 CE9 REFRIGERATOR SENSOR EET 063 2 25 R41 26 1KF 77 4 AIN2 4 L 2KJ DEFROST SENSOR 223 T uF du 50V 77 MICOM CON RT1 26 R42 10 2 ans L 6 RT SENSOR 223 T 10uF d 50V 1 nm The upper CIRCUIT reads REFRIGERATOR temperature FREEZER Temperature and DEFROST SENSOR temperature for defrosting and the indoor temperature for compensating for the surrounding temperature into MICOM OPENING or SHORT state of each TEMPERATURE SENSOR are as follows SENSOR CHECK POINT NORMAL 30 C 50 SHORT CIRCUITED OPEN Freezer Sensor POINT A Voltage Refrigerator Sensor POINT Voltage Defrosting Sensor POINT Voltage Room Temperature sensor POINT D Voltage 8 2 6 Refrigeration Compartment Stepping Motor Damper Circuit The circuit shown below is the damper circuit to regulate the refrigerator temperature 0 9 16 7774 CON4 EE OD 7 12 15 Tq u 77 50V R45 3846 To PNT 5 STEPPING 13 7 10KJ 710Kd 8 MOTOR 11 6 6 P02 14 15 3 457 10 7 PO1 12 13
3. C R DOOR D PERCEPTION SW 9 lt F SENSOR R SENSOR PWB PCB ASSEMBLY MAIN DEF SENSOR A F DOOR 8 PERCEPTION S W N o lt L RT SENSOR nj mj WNALVE FUSE M 72 C 176 cim DOOR S W F 1 cim DOOR S W R 98 C C FAN HEATER SHEATH m o F DOOR HEATER FRONT HEATER L DOOR HEATER POWER FUSE M SW MOTOR 9 ICE SENSOR M M ICE MAKER a 26 8 ia L EARTH STARTER PART I aj 1 CON6 CON4 CON1 PLUG TYPE ICE MAKER PART CAPACITOR PART DISPENSER PWB PCB ASSEMBLY ICE MAKER PART WATER VALVE PART AND COMP EARTH PART ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN ICE MAKER PART DIFFERENT LOCALITIE
4. MICOM 29 8 2 7 Key Button Input amp Display Light On Circuit The circuit shown above determines whether a function control key on the operation display is pushed It also turns on the corresponding function indication LED LED Module SEVEN SEGMENT DISPLAY SEVEN SEGMENT DISPLAY MODULE The drive type is the scan type 7 30 e IC8 M54563FP CON4 CON102 1 3 18 P77 8 1 P76 2 4 17 5 4 P75 3 5 16 P74 amp 6 15 5 P73 5 2 14 12 7 71 8 13 T 2 6 1 4 CONS CON101 6 R24 ds 240 1 2W 1 11 2 1 9 Ask 121 40 ps 8 13 R25 D 240 1 2W N 39 7 14 R26 gt p 1 240 1 2W 3 38 6 15 R27 240 1 2W t 57 5 16 R28 4 MICOM A pelt 36 4 17 R29 9 PIS 240 1 2W 6 34 3 18 R30 5E 240 1 2W 7 55 2 19 R31 7 ie 240 1 2W 32 1 20 R32 M i 220 1 2W 9 42 R33 51 4 7 a R35 R36 5 4 12 1000 4 7KJ 102 8 3 RESISTANCE SPECIFICATION OF SENSOR RESISTANCE OF FREEZER RESISTANCE OF REFRIGERATOR amp
5. eset AM CEI2 lt OAO R45 Bl 4 4 o ERE 34 8 5 2 Replacement Parts List E 5 t No DESCRIPTION SPEC MAKER REMARK 1 6870 8131 PWB PCB BETTER BRAVO PJT DOO SAN 16 e 6170 2012 TRANSFDRMER SMPSICDILI DL PJT 2 9MH 20W SAM II IRANS 6170JB2012C TRANSFDRMER SMPSLCDIL GR 207 BLDC 100 127 SAM II TRANS 4 6630VMOllll CONNECTOR lt CIRC WAFER YW396 3 96MM 396 lt 11P 2 4 6 8 10 YEON HO 5 6630AQ9106C CONNECTOR CIRC WAFER YW396 07AV 7PIN 3 96MM STRAIGHT SN YEON HO CUNG 6 66304091064 lt CIRC VAFER YW396 03AV YEUN CUN3 7 6630JB8004M CONNECTOR CIRC WAFER 250 13P 2 5MM STRAIGHT SN YEON HO 6630JB8004L__ CONNECTOR CIRC WAFER SMW250 12 2 5MM STRAIGHT SN YEON HO CONS 9 6630JBB004G CUNNECTUR lt CIRC W SMW250 YEUNHU 8P 2 5MM STRAIGHT SN YEON CUNG 10 6630JB8004B CONNECTOR lt CIRC VAFER
6. 4 1 COMPRESSOR 4 1 1 Role The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses this gas to high temperature and high pressure gas It then delivers the gas to the condenser 4 1 2 Composition The compressor includes overload protection The PTC starter and OLP overload protector are attached to the outside of the compressor Since the compressor is manufactured to tolerances of 1 micron and is hermetically sealed in a dust and moisture free environment use extreme caution when repairing it 4 1 3 Note for Usage 1 Be careful not to allow over voltage and over current 2 If compressor is dropped or handled carelessly poor operation and noise may result 3 Use proper electric components appropriate to the Particular Compressor in your product 4 Keep Compressor dry If the Compressor gets wet in the rain or a damp environment and rust forms in the pin of the Hermetic Terminal poor operation and contact may result 5 When replacing the Compressor be careful that dust humidity and soldering flux don t contaminate the inside of the compressor Dust humidity and solder flux contaminate the cylinder and may cause noise improper operation or even cause it to lock up 4 2 PTC STARTER 4 2 1 Composition of PTC Starter 1 PTC Positive Temperature Coefficient is a no contact semiconductor starting device which uses ceramic material consisting of
7. pow SR out of connector indicated mode m EN arung minimum 2 hours after CSE failure occurs Poor motor hooking to a R ae If there is no fan motor wires of fan contact of 6 54 Re Er signal for more than 65sec structures to fan snapping 2 in operation fan motor or short circuit of Lead ompartmen wires Note 1 Room Temperature Sensor is not indicated on the failure indicating part but indicated in checking Display When pressing for more than the warmer key of Refrigerator Temp and the warmer kye of Freezer Temp for more than 1 second LED check function If simultaneously pressing the warmer key of Refrigerator Temp and the warmer key of Freezer Temp for a second all display LED graphics on If releasing the button the LED graphics displays the previous status 23 8 1 11 TEST Mode 1 The Test mode allows checking the PCB and the function of the product as well as finding out the defective part in case of an error 2 The test mode is operated by pressing two buttons at Display panel 3 While in the test mode the function control button is not recognized but the recognition tone beep sounds 4 After exiting the test mode be sure to reset by unplugging and then plugging in the appliance 5 If an error such as a sensor failure is detected while in the test mode the test mode is cleared and the error code is displayed 6 While an error code is
8. gt Motor on 1 Ice removing completion point off i 110 sec i 1 1 Hall IC ov fig1 Harvest mode Process 17 7 2 4 Fill Park Position 1 Once a normal harvest mode has been completed the water solenoid will be activated 2 The amount of water is adjusted by pressing the water supply control S W This changes the time allowed for fill as illustrated in the chart lt Water supply amount TABLE gt STAGE TIME TO SUPPLY INDICATIONS REMARKS 1 6 sec L 2 6 5 sec The water amount will vary depending on the water control Switch setting as 3 7 Sec well as the water pressure of the connected water line 4 7 5 ex L 5 8 sec NOTE Below is example used by another vendor explanation of what is taking place Feeler Arm Drops Motor On Heater Of f gt Heater Off thru detection of Hall IC Motor On Heater OFF Ice Dumps Water Valve Ont 6 10sec gt Motor On Heater Off Ejector Park Start Position Detection zone for Pork position Motor On Heater Un 14sec 76 Feeler Arm Rises Ejector stalls on Ice Motor On Heater 5 to 2min Motor On Heater 18 7 2 5 Function TEST 1 This is a compulsory operation for TEST SVC cleaning etc It is operated by pressing the water s
9. ud 7805 9 Varef POWER 9 INR14D621 220 240 42 are INR14D331 100 127 9 cca CES ccs 104 104 2200 104 2 21 Vss 1 7 gt Vass 221 2KV 7 a TEST The secondary part of the TRANSFORMER is composed of the power supply for the display the BLDC FAN Motor drive 15 5 V the relay drive 12 Vdc and the MICOM and IC 5 Vdc The voltage for each part is as follows PART VA 1 CE4 CE5 VOLTAGE 115 Vac 12 Vdc 15 5 Vdc 5V VA1 is a part for preventing over voltage and noise When 385V or higher power is applied the inside elements are short circuited and broken resulting in blowout of the fuse in order to protect the elements of the secondary part of the TRANSFORMER 25 8 2 2 Oscillation Circuit 19 me OSC1 XIN CSTSO400MGO3 ce ee o wer T 20 7 77 e XOUT MICOM This circuit generates the base clock for calculating time and the synchro clock for transmitting data from and to the inside logic elements of the IC1 MICOM Be sure to use specific replacement parts since calculating time by the IC1 may be changed If changed the OSC1 SPEC will not work 8 2 3 Reset Circuit x9 Nex 1 2 3 z 18 KIA7042 RESET CC7 2 104 CES MICOM Th
10. 250 2 5MM STRAIGHT SN CUN7 0127 7820440 IC DRAWING TMP87C846N 42P SDIP BK MASK BRAVO PJT BETTER TOSHIBA 1 lt 0177 7820446 12 OIKE431000A 431 3 PIN TP 14 13 01 6500308 IC KEC KTD65003AP TEP SDIP BK DRIVE 1 6 14 01 6508308 KTD650834F COP SUP ST LED DRIVERCTR ARRAY KEC TC 15 OIKE704200A KIA7042P KEC 3P BK RESET KEC IC7 16 01 780500 IC LINEAR KIA7805PI KEC 125 17 IC PUWER MANAGEMENT PS256ILI I V NEC 4P DIP BK TLP72IF NEC IC3 18 OISK635100A TC POWER MANAGEMENT STR G6351 SPIN SMPS 2 4PIN FORM SANKEN 19 OISTLMIO0IA IC STANDARD LOGIC M54563FP MITSUBISHI 20 R TP CONVERT MITSUBISH IC8 0110777400 IC DRAVING 7774 16 SDIP BK DRIVE IC STEPPING MOTOR TOSHIBA 1 10 21 69200000014 RELAY ALE15B12 MATSUSHITA 250VAC 16 12VDC 1A NO VENTING NAIS RYL 6920JB2003A RELAY G5N 1A OMRON 250 15 12VDC 14 JAPAN OMRON RY4 23 6920JB2003D _ RELAY GSNB 14 E OMRON 250VAC 5A 12VDC 1 VENTING OMRON RY2 24 6920JB2009B 55 14 OMRON 250VAC 5A 12VDC 1C VENTING OMRON RY 25 6212 880018 RESUNATUR CERAMIC CSTS0400MG03 MURATA 4MHZ TP MURATA OSCI 26 6102 JB80018 VARISTOR INR14D621 ILJIN UL VDE BK 620V IL JIN VAL 27 6102W5V007A VARISTUR INRI4D33IK IL UL CSA VDE IL JIN AT 28 0DB36000044 DIUDE RECTIFIERS D3SB
11. m mo 18 3 26 42 2 gt 615225 ROOM TEMPERATURE SENSOR rh 1 9 EXPLODED VIEW amp REPLACEMENT PARTS LIST CASE PARTS CAUTION Use the part number to order part not the position number p A6 329 Z c re Ae jp number CAUTION Use the part number to order part not the position FREEZER PARTS 40 number CAUTION Use the part number to order part not the position REFRIGERATOR PARTS on some models DOOR PARTS CAUTION Use the part number to order part not the position number on some models 42 CAUTION Use the part number to order part not the position number ICE amp MAKER PARTS A 43 LG Electronics Inc P No 3828JL8031C APR 2004 Printed in Korea
12. Normal cooling is possible by m cool normally restoring the normal amount of ba refrigerant and repairing the leak gt COMPLETE Freezer Flowing sound of refrigerant Equal to ambient No discharging of Refrigerant LEAKAGE compartment and is not heard and frost isn t temperature Normal cooling is possible by Refrigerator don t formed restoring the normal amount of cool normally refrigerant and repairing the leak o PARTIAL Freezer Flowing sound of refrigerant A little higher Normal discharging of the CLOG compartment is heard and frost forms than ambient refrigerant o Refrigerator don t in inlet only temperature The capillary tube is faulty m cool normally 5 lt WHOLE Freezer Flowing sound of refrigerant Equal to ambient Normal discharging of the CLOG compartment and is not heard and frost isn t temperature Refrigerant 9 Refrigerator don t cool formed MOISTURE Cooling operation Flowing sound of refrigerant Lower than Cooling operation restarts CLOG stops periodically is not heard and frost melts ambient when heating the inlet of the temperature capillary tube COMP Freezer and Low flowing sound of A little higher e Low pressure at high side g RESSION Refrigerator refrigerant is heard and than ambient of compressor due to low y m don t cool frost forms in inlet only temperature refrigerant level 19 compressing Flowing sound refrigerant
13. 2 Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap Figure 7 GRILLE ASSEMBLY DEFROST CONTROL ASSEMBLY cou N Figure 7 Figure 8 3 4 1 Refrigerator Compartment Lamp 1 Unplug the power cord from the outlet 2 Remove refrigerator shelves 3 Release the hooks on both ends of the lamp shield and pull the shield downward to remove it 4 Turn the lamp counterclockwise 5 Assemble in reverse order of disassembly Replacement bulb must be the same specification as the original Max 60 W2EA Figure 9 3 4 2 Freezer Compartment Lamp 1 Unplug refrigerator or disconnect power 2 Reach behind light shield to remove bulb 3 Replace bulb with a 40 watt appliance bulb 4 Plug in refrigerator or reconnect power 3 5 CONTROL BOX REFRIGERATOR 1 First remove all shelves in the refrigerator than remove the Refrigerator control Box by loosening 2 screws CONTROL BOX COVER LAMP Figure 10 2 Remove the Refrigerator Control Box by pulling it downward 3 Disconnect the lead wire on the right position and separate the lamp sockets 3 6 MULTI DUCT 1 Remove an upper and lower Cap by using a flat screwdriver and loosen 3 screws Figure 11 2 Disconnect the lead wire on the bottom position Figure 11 4 ADJUSTMENT
14. 240 minutes after starting 4 If the temperature sensor is defective the ice making function will be completed in 4 hours NOTE After Icemaker Power is ON the Icemaker heater will be on for test for 9 sec 7 2 3 Harvest Mode 1 Ice removing control refers to the operation of dropping cubes into the ice bin from the tray when ice making has completed 2 Ice removing control mode 1 Operates Heater for 30 seconds then operate MOTOR 2 After performing Step 1 to control the Heater on its off condition Ice Removal control will be back in place wthin 18 minutes Hall SENSOR sign OV Ice removal is then complete Then change the mode to the water supply control If this control phase fails to start it is not functioning Put the Heater and Motor in the off position Restart every 2 hours Refer to fig 1 NOTE If the motor malfunctions and starts before the detect lever rises MICOM regards the Ice Removing phase as completed Water then starts flowing To prevent this MICOM doesn t switch to water supply mode but restarts the ice removing mode If this happens 3 times the motor is malfunctioning and you should stop the loads Heater Motor Then restart the Ice Removing mode every 2 hours See Step 2 above Heater OFF condition Ice making sensor temperature is 50 F 10 C or more Max 18 minutes After detect LEVER rises on off 1 2ms 130 sec 1
15. Door Pull out Drawer Freezer Door Rack Tilting 3 DISASSEMBLY 3 1 DOOR e Refrigerator Door 1 Remove the hinge cover by pulling it upwards 2 Loosen the hex head bolts attaching the upper hinge to the body and lift the freezer door HINGE COVER HINGE Figure 1 3 Pull out the door gasket to remove from the door foam assembly GASKET Figure 2 Freezer Door 1 Loosen the hex head bolts attaching the lower hinge to the body to remove the refrigerator door only LOWER HINGE Figure 3 2 Pull out the door gasket to remove from the door foam assembly 3 2 FAN AND FAN MOTOR 1 Remove the freezer shelf If your refrigerator has an icemaker remove the icemaker first 2 Remove the grille by pulling it out and by loosening a screw 3 Remove the Fan Motor assembly by loosening 2 screws and disassemble the shroud 4 Pull out the fan and separate the Fan Motor and Bracket FAN MOTOR Figure 5 3 3 DEFROST CONTROL ASSEMBLY Defrost Control assembly consists of Defrost Sensor and FUSE M The Defrost Sensor works to defrost automatically It is attached to the metal side of the Evaporator and senses its temperature At 72 it turns the Defrost Heater off Fuse M is a safety device for preventing over heating of the Heater when defrosting 1 Pull out the grille assembly Figure 6
16. E 36 8 6 PWB DIAGRAM BDI D3SBA60 TRANS 03 hoy 6 nu un 8 6 1 PWB Main Assembly Fa gt IN 630v le 12 L1 44 11 N 4 wi Voref o sms a Vss Vass 17 TEST ICE MAKER 7 ls 4 13 pam ALETSB12 2 IC6 pre ser 1 D7 9 pas 3 D COBLING F A OND EN Z MN 2 7 DEF HEATER FUSE M _ 4 POS 5 RY3 G5S 1A co o 3 12 lt 2 P04 8 r ea DOOR SM R18R2 WY CONS 3 RY4 ji DEW HEATER G5N 1A 10 13 ocH DOOR 1 d FRENCH DOOR 35 HEATER 14 PPG 29 P66 4 0SC1 rr ae CSTS0400MG03 1 oaks Oi 82 28 1 7 42 18 RESET cce 2 16 TEST S W 4 7KJ 28 gt 65 ANS 16 PWB ASSY MAIN SMD FES FIG 1 TOSHIBA TMP87C846N IC1 2 1 P77 P76 75 74 P73 P71 P22 P21 P20 P17 P16 P15 P13
17. Equal to ambient No pressure in the high an RESSION operation is not heard and there is temperature pressure part of the 2 no frost compressor 14 6 5 1 SEALED SYSTEM DIAGNOSIS Not Cooling Complaint All components operating No airflow problems Not frosted up as a defrost problem problem has been isolated to sealed system area Frost Pattern None Partial Equalization Test Equalization Test Very Fast Very Slow Very Slow Fast Very Fast Inefficient Compressor Complete Restriction Partial Restriction Condenser Temperature Hotter than Normal Room Temperature None to Weak Air Low Side Loss of Change Leak Compressor Not Pumping Trace of Oil No Undercharge The equalization test is trying to restart a compressor using a start kit after it has been operating 15 7 OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 7 1 OPERATION PRINCIPLE 7 1 1 Operation Principle of IceMaker Power On Start Position Ice Making Adjusts EJECTOR to Start Position with power on Waits until water becomes cold after starting the Mode ice making operation Harvest Mode Park Position Test Mode To operate LINE and SERVICE press and hold the Fill Key for 3 seconds The ice maker will run through 3 stages Harvest Fill Icemaking Runs MOTOR to drop ice from the tray the ICE BIN Perform
18. TEMPERATURE SENSOR DEFROST SENSOR amp ROOM SENSOR 20 4 F 22 3 KQ 77 15 5 F 16 9 60 10 14 F 13 0 47 3 KQ 5 C 23 F 10 1 38 4 32 F 7 8 30 KQ 5 41 F 6 2 24 1 10 50 F 4 9 19 5 15 59 F 3 9 15 9 20 68 F 3 1 KQ 13 KO 25 77 F 2 5 11 30 86 F 2 0 8 9 KQ 40 C 104 F 14 6 2 50 122 F 0 8 KQ 4 3 KQ The resistance of the SENSOR has a 5 common difference Measure the resistance of the SENSOR after leaving it for over 3 minutes in the measuring temperature This delay is necessary due to sensor response speed 31 8 4 TROUBLESHOOTING PROBLEM INDICATED BY CHECK CHECKING METHOD CAUSE SOLUTION POWER SOURCE 1 The whole DISPLAY 1 FREEZER Check if FREEZER POWER SOURCE is poor Check outlet Voltage iS poor LED SEVEN SEGMENT REFRIGERATOR REFRIGERATOR DOOR 15 DISPLAY is off OPEN and check display 2 DISPLAY LED 2 If LAMP is dim Check visually Applied voltage error Use boosting TRANS SEVEN SEGMENT 3 The connection of Check connection of CONNECTOR connection Reconnect CONNECTOR DISPLAY operates the MAIN PWB CONNECTOR iS poor abnormally CONNECTOR TRANS FUSE is open Replace TRANS COOLING is poor NO COOLING 1 If the COMPRESSOR USE TEST MODE1 COMPRESSOR locked or Replace COMPRESS
19. air are sufficient by touching the check supplied on the REFRIGERATOR Passage of cool air is blocked Remove impurities EVA frozen See DEFROSTING is poor 3 Door Line contact Check door seal when door is closed Door liner damaged Replace Door liner DEFROSTING is poor NO DEFROSTING 1 If HEATER emits heat USE TEST MODE2 forced DEFROSTING HEATER disconnection Replace HEATER TEMPERATURE FUSE Replace TEMPERATURE disconnection FUSE Connection is poor Check EVAPORATOR connection and wire of MAIN PWB CONNECTOR DEFROST SENSOR is poor Replace DEFROST SENSOR HEATER RELAY is poor Replace RY2 of MAIN PWB 2 If DRAIN PIPE is Check DRAIN PIPE DRAIN PIPE is blocked Remove ice and impurities blocked Check HEATER PLATE resistance 3 If ice remains after Make sure that DEFROST Connection is poor Reassemble the DEFROSTING SENSOR is connected DEFROST SENSOR Make sure that FREEZER DOOR does not close Reassemble DOOR REFRIGERATOR DOOR is closed properly Replace GASKET 33 8 5 MAIN PWB ASSEMBLY AND PARTS LIST 8 5 1 Main PWB Assembly HOT DISPLAY FSA D SNR R SNR_F SNR CIETE DERI e o Al Ra mo Mo J18 J19 515 97 Mom E o B lo jo o o Ha
20. displayed the test mode will not be activated MODE MANIPULATION CONTENTS REMARKS TEST1 Push Express Freezing 1 Continuous operation of the Key and COLDER KEY COMPRESSOR and the Freezer fan of Freezer Temp at the 2 Stepping DAMPER OPEN Same time over 3 3 Defrosting HEATER OFF seconds OR Push TEST 4 DISPLAY LED all ON S W in the main Board Once TEST2 Push Express Freezing 1 Continuous operation of the Key and COLDER KEY COMPRESSOR and the Freezer fan of Freezer Temp at the 2 Stepping DAMPER CLOSE Same time over 3 3 Defrosting HEATER OFF seconds In TEST MODE 4 DISPLAY LED ahows no 2 1 OR Push TEST S W Once in TEST MODE 1 TESTS Push Express Freezing 1 COMPRESSOR and the Freezer fan Reset if the Key and COLDER KEY OFF Temperature of the of Freezer Temp at the 2 Stepping DAMPER CLOSE Defrosting sensor is Same time over 3 3 Defrosting HEATER ON 46 F 8 C or more seconds In TEST MODE 4 DISPLAY LED ahows no 3 2 OR Push TEST S W Once in TEST MODE 2 Reset Push Express Freezing Reset to the previously setting The compressor will Key and COLDER KEY Before TEST MODE Start after a 7 minute of Freezer Temp at the Delay Same time over 3 seconds In TEST MODE 3 OR Push TEST S W Once in TEST MODE 3 Freezer Fan RPM Variable Check In case the freezer fan is in operation when the WARMER KEY in Refrigerator and Freezer Temp Control are pressed for more than one second at the same time freezer fan RPM changes
21. if the door gasket is dirty with an item like juice Is the refrigerator level s there too much food in the refrigerator Clean the door gasket Position in the firm place and level the Leveling Screw Make sure food stored in shelves does not prevent the door from closing Ice and foods smell unpleasant Check if the inside of the unit is dirty Are foods with a strong odor unwrapped The unit smells of plastic Clean the inside of the unit Wrap foods that have a strong odor New products smell of plastic but this will go away after 1 2 weeks e Other possible problems the freezer Check the refrigeration system Check the Thermistor Check if frost forms in Not x defrosting y of the defrosting circuit The system Perform sealed gt is faulty system repair The operation of Replace the c gt the Thermistor is Thermistor incorrect 13 Check Components 6 5 REFRIGERATION CYCLE Troubleshooting Chart EAE STATE OF STATE OF THE TEMPERATURE REMARKS THE UNIT EVAPORATOR OF THE COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard and than ambient to a leak Refrigerator don t frost forms in inlet only temperature
22. starts during EXPRESS FREEZING EXPRESS FREZZING operates for the rest of time after defrost is completed when EXPRESS FREZZING operation time is less than 90 minutes If EXPRESS FREZZING operates for more than 90minutes the EXPRESS FREZZING will operate for two hours after defrost is completed 3 If EXPRESS FREZZING is pressed during defrost EXPRESS FREZZING LED is on but this function will start seven minutes after defrost is completed and it shall operate for three hours 4 If EXPRESS FREZZING is selected within seven minutes after compressor has stopped the compressor compressor delays seven minutes shall start after the balance of the delay time 5 The fan motor in the freezer compartment rotates at high speed during EXPRESS FREZZING 6 For the rest of 21 hours the freezer will be controlled at the lowest temperature 8 1 5 REFRIGERATOR LAMP AUTO OFF 1 To protect the risk of lamp heat when Refrigerator door opens for 7 min refrigerator lamp is auto off 20 8 1 6 Alarm for Open Door 1 This feature sounds a buzzer when the freezer or refrigerator door is not closed within 1 minute after it is opened 2 One minute after the door is opened the buzzer sounds three times each for 1 2 seconds These tones repeat every 30 seconds 3 The alarm is cancelled when the freezer or the refrigerator is closed while the buzzer sounds or Refrigerator Door Freezer Door Closed Closed Closed 3 Times 3 Times 3
23. 11 OTHER ELEGCTRICAE COMPONENTS didi ke bete ai aree ee a rc vie rb cedet Re cec eec 12 SERVICE DIAGNOSIS CHARLT 3 tine he e t ele o e Pene e k a de debet do 13 REFRIGERATION GY CLE x etie eet ie dde do e t do e eee 14 15 OPERATION PRINCIPLE 8 REPAIR METHOD OF ICEMAKER 16 19 DESCRIPTION OF FUNCTION amp CIRCUIT OF 424 1 2 ananasas saaa saaa asa 20 38 EXPLODED VIEW amp REPLACEMENT PARTS LIST 39 SAFETY PRECAUTIONS Please read the following instructions before servicing your refrigerator 1 Check the refrigerator for current leakage 7 Close the top door before opening the bottom door 2 To prevent electric shock unplug before servicing Otherwise you might hit your head when you stand up 3 Always check line voltage and amperage 8 When tilting the refrigerator remove any materials on 4 Ues stdndard electriesi components the refrigerator especially the thin plates ex glass P shelf or books 5 Don t touch metal products in the freezer with wet 9 When servicing the evaporator wear cotton gloves This is to prevent injuries from the sharp evaporator 6 Prevent water from spiling onto electric elements or the fins machine parts hands This may cause frostbite 10 Service on the refrigerator should be performed by a qualified tech
24. 2 R TP R13 RI6 R47 58 ORHI004L622 RESISTOR METAL GLAZEI lt CHIP 1 1 8 57 2012 R TP ROHM 59 ORHIS0IL62e RESISTOR METAL GLAZEDCHIP 18K OHM 1 8 W 2012 5 00 D ROHM R7 60 ORHe001L622 RESISTOR METAL GLAZE D lt CHIP 2K OHM 1 7 8 V 5 2012 R TP ROHM R35 R37 R39 R44 61 ORH2200L622 RESISTUR METAL GLAZEIKCHIP 220 OHM 1 8 5 2012 R TP ROHM R10 68 0RH3300L622 RESISTOR METAL GLAZED CHIP gt 330 OHM 1 8 57 2012 R TP ROHM R17 63 ORH470IL62e RESISTOR METAL GLAZED lt CHIP 4 7K OHM 178 5 2012 R TP ROHM 12 21 834 64 0RJO332E672 GLAZED lt CHIP 33 OHM 178 W 5 2012 R TP ROHM RS 65 0RJIS01H678 RESISTUR METAL GLAZEDXCHIP 15K OHM 1 2 V 5X 2012 R TP ROHM R18 66 ORJ2200H672 RESISTURMETAL GLAZEDCHIP 220 OHM 1 2 W 57 2012 ROHM R32 67 ORJe401E47e RESISTOR METAL GLAZE D lt CHIP 2 4K OHM 1 8 V 17 2012 R TP ROHM RL2 ORJ6800E67e RESISTOR METAL GLAZEIXCHIP 680 OHM 1 8 57 2012 R TP ROHM R6 69 70 0RJe400H672 RESISTOR METAL GLAZEIKCHIP 240 OHM 1 2 5 2012 R TP ROHM R25 R31 71 08024006609 RESISTUR METAL GLAZE D lt CHIP 240 OHM 172 5 TADS SMART R24 72 0RJSI0IE472 RESISTOR METAL GLAZEIXCHIP 9 1K DHM 1 8 V 14 2012 R TP ROHM RLI 73 ORN1002G409 RESISTOR FIXED METAL FILM OHM 1 4 1007 52 SMART RTI 74 ORNIG22G409 RESISTOR FIXED METAL FILM 16 2K OHM 174 1007 TAS2 SMART 75 ORNE618G409 RESISTUR FIXED METAL FIL
25. 45 C when power cuts SERVICE 0 5 sec COMP in 0 5 sec Freezer FAN 5 Reset to normal operation Total load in 7 min COMP 0 5 Freezer FAN from TEST MODE OFF ON ON 22 8 1 10 Defect Diagnosis Function 1 Automatic diagnosis makes servicing the refrigerator easy 2 When a defect occurs the buttons will not operate but the tones such as ding will sound 3 When the defect CODE removes the sign it returns to normal operation RESET 4 The defect CODE shows on the Refrigerator and Freezer Display Better Model REFRIGERATOR TEMP ERES FREEZER TEMP I ani ds v kr COLDER WARMER COLDER WARMER 0 l X GN UN cS 37 F IS RECOMMENDED 0 F IS RECOMMENDED Ld Ld Defect code signs 2 Defect code signs ERROR CODE on display panel NO ITEM ES CONTENTS REMARKS Failure of freezer sensor Cut or short circuit wire n Failure of Refrigerator sensor Cut or short circuit wire Inspect Connecting wires Failure of defrost _ on each sensor Sensor L Cut or short circuit wire 9 4 LL Failure of Room 4 Temperature When display check Cut or short circuit wire Sensor mode Er rt Snapping of defrost heater Fail f def d cd or Temperature fuse pull 5 ai of defrost E
26. 5 73 2PIN 1 SCREW 1 2 ICP 1SBF0302418 SCREW TAP TITECS BINDING HEAD 03 0 L8 0 MSWR3 F ZY HAENG SUNG 94 49111004 ISOLDER SOLDERING NA HEESUNG METAL BAR SN 63 NA 95 59333105 FLUX 95 71 KOKI KOREACKSK SG 0 808 0 003 96 9VWFO120000 SULDER RUSIN WIRE RSO 01 20 35 8 5 3 PWB Assembly Display And Parts List 5103 5102 2 e 2 2 59105 59104 SEGI0 uos SEG102 Hos No DESCRIPTION SPEC MAKER REMARK 1 6870JB8090A lt KS PJT DISPENSER DISPLAY DOO SAN 2 3 6630JB8005D WAFER SMAW250 11 YEON HO 101 4 6630JB8004U SMAW250 06 CON102 5 6600JB8005A SWITCH TACT 1105 KYUNG IN SV102 105 6 6600RRT002K JTP1230A JEIL 12V DC 50MA JEIL 7 6600JB8004A TACT S W KPT 1109R KYUNG IN SW106 8 TACT S W KPT 1109G KYUNG IN 9 6327JB8001A DISPLAY LED ASSEMBLY LN4023 13EWRS GREEN 2 1V 1 7MCD LEDTECH SEGLSEG2 10 ODLLEOOS9AA LED LT8323 41 BCN 21V D3 TP GREEN L102 105 1 0DD414809AA DIODE SWITCHING 1N4148 26MM PYUNG CHANG 0107 113 12 000400400 1N4004 DELTA D101 106 13 68548500014 JUMP WIRE 0 6MM 52MM TP TAPING 5 10 gt J01 06 J08 13 14 9VWF 0120000 SOLDERCROSIN WIRED RSO D1 20 HEE SUNG 15 49111004 SOLDER SOLDERING H63A E 16 59333105 FLUX SG 0 823 0 830 KOREA 206 KOKI
27. A60 BK SHINDENGEN 600V 4 80A 10UA SHINDENGEN BDL 29 0DD400409AC DIODE RECTIFIERS RECTIN4004 DELTA D7 ODR107009AA DIODE RECTIFIERS FR107 TP RECTRUN DO41 1000V 1A 304 500NSEC 5A DELTA DLD2 D5 D6 ODRSA00070A DIODE RECTIFIERS RL2 SANKEN BK NUN 400V 40A SONSEC 10UA SANKEN D3 D4 OCE105BK638 CAPACITOR FIXED ELECTROLYTIC RG YX 50 0 2 FMS TP 5 SAM CE12 0 106 638 CAPACITOR FIXED ELECTROLYTIC 10UF KMG 50V 20 5 TP 5 SAM WHA 34 0 7 638 CAPACITOR FIXED ELECTROLYTIC 220UF KME 16V 20 5 5 SAM WHA CE5 35 0 7 638 CAPACITUR FIXED ELECTROLYTIC 220UF KME RG 25 20 5 TP 5 SAM WHA CE7 36 0 476 638 CAPACITUR FIXED ELECTROLYTIC 47UF KME RG YX 25V 0 2 FMS TP 5 SAM WHA 6 37 0 476 638 CAPACITUR FIXED ELECTROLYTIC 47UF KME TYPE 50 20 5 TP 5 38 0 4767 6 0 CAPACITUR FIXED ELECTROLYTIC 47UF HE 450V 20 BULK SNAP IN SAM WHA CE1 39 OCE687YH6E0 CAPACITOR FIXED ELECTROLYTIC 680UF RX 25V 20 BULK SNAP IN WHA 40 0 687 618 CAPACITUR FIXED ELECTROLYTIC 680UF 35V 204 TP 5 FL WHA CE4 41 OCK102DK96A CAPACITOR FIXED CERAMICCHIGH DIELECTRIC INF 2012 50 80 20 R TP X7R MURATA CC9 CCIO 42 OCK1040K949 CAPACITDR FIXED CERAMIC High dielectric D 50 804 204 FCYSV 52 SAM CC3 CC4 CC6 CC7 0 1040 94 4 CAPACITDR FI
28. BaTiOs 2 The higher the temperature is the higher the resistance value These features are used as a starting device for the Motor 4 2 2 Role of PTC Starter 1 The PTC is attached to the Sealed Compressor and is used for starting the Motor 2 The compressor is a single phase induction motor Durign the starting operation the PTC allows current flow to both the start winding and main winding 4 2 3 PTC Applied Circuit Diagram e Starting Method for the Motor OVERLOAD PROTECTOR 6 0 3 PTC COMPRESSOR 6 MOTOR M L1 gt PTC STARTER SEALED TERMINAL Resistance Starter Capacitor Running Figure 12 4 2 4 Motor Restarting and PTC Cooling 1 It requires approximately 5 minutes for the pressure to equalize before the compressor can restart 2 The PTC device generates heat during operation Therefore it must be allowed to cool before the compressor can restart 4 2 5 Relation of PTC Starter and OLP 1 If the compressor attempts to restart before the PTC device is cooled the PTC device will allow current to flow only to the main winding 2 The OLP will open because of the over current condition This same process will continue 3 to 5 times when the compressor attempts to restart until the PTC device has cooled The correct OLP must be properly attached to prevent damage to the compressor Parts may appear physically identical but could have different electrical ratings Repl
29. M 26 1K OHM 1 4 W 1 00 52 SMART RRLRDI 76 ORS0101J609 RESISTOR FIXED METAL OXIDE FILM 1 OHM 5007 52 SMART 77 ORS0470J609 RESISTUR FIXED METAL OXIDE FILM 0 47 OHM 1 57 SMART 78 ORS1503J609 RESISTUR FIXED METAL OXIDE FILM 150K OHM 1 5 00 TAS2 SMART RL 79 0855602 641 RESISTUR FIXED METAL OXIDE FILM 56K OHM 2 W 5 00 F20 SMART R3 80 0558202609 RESISTUR FIXED METAL OXIDE FILM OHM 1 5 00 TAS2 SMART RI 81 OLRIOOIM4F 0 INDUCTOR RADIAL LEAD 10000 207 R 6 12 5 BULK TNC L3 82 0 19809 TRANSISIDR KTC3198 TP Y lt 1815 KEC 03 04 EH 0 00008 1 1 ARS 151 BK T0126 60V 5A 02 065 R TP SOT23 50V 100MA 85 220 30014 FUSE DRAWING 250V SLUW BLOW LITTELFUSE TRIAD P User 86 6200 7880044 FILTERKCIRCLEMC 940050 TNC TNC Li 87 6200JB8007X FIL TERCCIRC EMC 11 05320 TNC BK 0 5A 320MH TNC L2 88 6210JB8001A FILTERCCIRC EMC BFS3510A0 SAMWHA 52 BEAD FILTER WHA FRI J27 lt 8MM J8 11 03 07 14 16 18 22 26 lt 10MM 6854B50001A WIRE 0 6MM 52MM TP TAPING SN DAE A LEAD 1010112134547 19 2002 J2115MM 90 6600RRTOO0IZ 5 JTP1280A6 12VDC 50MA JEIL SWI 91 6908JB3002D BUZZER PQ272207PL e0C 2000 SUNWAY PIEZO 2KHZ 8008 CHINA SUN WAY BUZZER 4920 83007 SINK 23 3x17x25 DRIVE IC STR R S64 6
30. OR operate forced COOLING blocked If less than 7 minutes pass OLP PTC is poor Replace OLP PTC after compressor shuts off COMPRESSOR RELAY is Replace MAIN PWB don t press the KEY and poor wait THE CONNECTING WIRE Check the connection of the iS poor black wire of the MAIN PWB CONNECTOR CON1 2 If refrigerant is leaking Measure the amount of frost Refrigerant leakage Replace the leaking part and sticking on EVAPORATOR replace any lost refrigerant and the surface temperature of the condenser pipe FREEZER 1 If FAN MOTOR USE TEST MODE1 FAN MOTOR is poor Replace the FAN MOTOR TEMPERATURE is operates forced COOLING incorrect CONNECTING WIRE is poor Refer to 8 2 4 2 and check 2 If DEFROSTING Check the amount of frost DEFROSTING is poor See DEFROSTING is normal sticking on the EVAPORATOR is poor 3 If SENSOR Check the resistance SENSOR RESISTANCE is Replace SENSOR is normal of the Refrigerator poor SENSOR 4 Door Line contact Check the seal when Door liner damaged Replace door liner the door is closed 32 PROBLEM INDICATED BY CHECK CHECKING METHOD CAUSE SOLUTION COOLING is poor If REFRIGERATOR 1 If FREEZER TEMPERATURE Checkis FREEZER Make sure the TEMPERATURE is normal TEMPERATURE is too low DOOR isattached is too low 2 If amount of cool air from Make sure that the amount FAN MOTOR is poor Replace FAN MOTOR FAN MOTOR is sufficient and speed of cool
31. REFRIGERATOR CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LRFC25750ST COLOR WESTERN BLACK LRFC21755SB STAINLESS STEEL LRFC21755ST TITANIUM LRFC21755TT CONTENTS SAFETY PRECAUTIONS 2 8 LEE 3 PARTS IDENTIFICATION m 4 DISASSEMBLY E A A 5 6 Poo EE 5 MOTOR b 6 DEFROST GONTROE ASSEMBDLY eum enin obe 6 npe ipee dude MI TTT 6 CONTROL BOX REFRIGERBATOR aaa Hodie seen inde 6 MUETIDUGT nouns o aae diem eU uu auiem 6 p Yeniui ag zi p 7 8 COMPRESSOR fit xtd ete e O ete ee cede t Ue e et be ed ede edet ee en td 7 PTG START me EE 7 OLP OVERLOAD PROTEGT OR ich edo he a e t c pe wes tc ba tbt ber edet e d ec Dec 8 TO REMOVE THE COVER e ede cuc dcbet boc e dee na 8 CIRCUIT DIAGRAM RO CN RN FR GR Na CA ERREUR IA E BC 9 TROUBLESHOOTING cineri conci aa ain ai i i Rada RAE k Va is GR ii i i NE Cul i i Au 10 15 COMPRESSOR AND ELECTRIC 20 10 AND OEP iine brem n eee iuba ee Nee ee te
32. S AND MODEL TYPE 3854JD1097A BN BROWN RD RED ORANGE YL YELLOW GN GREEN WH WHITE PK PINK GY GREY PR PUTPLE SB SKY BLUE BL BLUE 6 TROUBLESHOOTING 6 1 COMPRESSOR AND ELECTRIC COMPONENTS p S Remove PTC Starter Rated Voltage YES 2 from Compressor and 10 measure voltage between Terminal C of Compressor and Terminals 5 or 6 of PTC YES No Voltage OLP disconnected Replace OLP NO Check connection condition Reconnect Applied voltage isn t Advise customer that in range of Rating power supply needs to be Voltage 10 checked by an electrician Check resistance between M C S C and Check resistance of Motor M S in Motor Open or short Replace Compressor Compressor Compressor Check Check resistance of two terminals in PTC Starter resistance of PTC Starter Reference Page12 Check OLP Check resistance of two terminals in OLP Reference Page12 The range of resistance is between 1 50Q ok YES Check starting state Check the power supply under load Compressor attempting to re start after being off for 5 minutes Supply Did voltage rating with 10 start 10 compressor YES Compressor is OK Replace the compressor it 6 2 PTC AND OLP Observation value is 115
33. Times 3 Times Buzzer i 4 gt 30 sec 30 sec 30 sec Within 1 min 1 min 8 1 7 Buzzer Sound When the button on the front Display is pushed a Ding Dong sound is produced Refer to the Buzzer Circuit 7 2 4 No 2 8 1 8 Defrosting removing frost 1 Defrosting starts each time the COMPRESSOR running time reaches 7 hours 2 For initial power on or for restoring power defrosting starts when the compressor running time reaches 4 hours 3 Defrosting stops if the sensor temperature reaches 46 4 F 8 C or more If the sensor doesn t reach 46 4 F 8 C in 2 hours the defrost mode is malfunctioning Refer to the defect diagnosis function 7 1 9 4 Defrosting won t function if its sensor is defective wires are cut or short circuited 21 8 1 9 Electrical Parts Are Turned On Sequentially Electrical parts such as COMP defrosting heater freezer FAN etc are turned on in the following order to prevent noise and parts damage Several parts are started at the same time at initial power on and are turned off together when TEST is completed OPERATING ORDERS Temperature of Defrosting Sensor is 113 F 45 C or POWER in 0 5 sec COMP in 0 5 sec Freezer FAN more when unit is newly ON _ gt ON y ON 5 purchased or when moved POWER in0 5sec Defrosting in10sec Defrost heater Temperature of defrosting ON gt heaterON OFF o sensor is lower than 113 F 2
34. V 60Hz 6 80 30 Normal operation of Compressor is impossible or poor Separate PTC Starter from Compressor and measure resistance between No 5 and 6 of PTC Starter with a Tester Figure 14 Replace PTC Starter The resistance value is 0Q short or open Shows continuity Separate OLP from Compressor and check resistance value between two terminals of OLP with a Tester Figure 15 Check another electric component Replace OLP Figure 15 T4 6 3 OTHER ELECTRICAL COMPONENTS Not cooling at all Compressor Check for open short or doesn t run o gt incorrect resistance readings in the following components a Starting devices gt Short open or broken Poor contact or shorted b OLP c Compressor coil Coil open or shorted d Wiring harness Poor contact or shorted Poor cooling performance gt Replace indicated component Compressor runs Check starting Low voltage poorly voltage Advise customer that the Power supply needs to be checked by an electrician Check voltage at Poor or broken or starting devices open contact Check current flowing Shorted in sub coil of Compressor Check rating of OLP gt Lack of capacity Fan motor Check wiring circuit Wire is open or doesn
35. XED CERAMICCHIGH DIELECTRIC 100NF 2012 50 80 20 R TP 5 gt MURATA CCS 44 0 22102510 CAPACITDR FIXED CERAMIC High dielectric 220P 2KV K B S SAM WHA CC2 45 0 2230 949 CAPACITUR FIXED CERAMICCHigh dielectric 22NF 50V Z 52 SAM WHA CC11 CC16 46 OCKe23DK96A CAPACITUR FIXED CERAMICCHIGH DIELECTRIC 22NF 2012 50V 804 204 R TP X7R MURATA CC8 46 0CK4710K519 CAPACITOR FIXED CERAMIC High dielectric 470PF 50V B TAS SAM WHA 47 1031 509 CAPACITOR FIXED FILM O 01UF D 100V 10 PE TPS SAM WHA CM4 48 0CG4732Y430 CAPACITOR FIXED FILM 47000PF S 630V 54 M PE NI R CM3 49 0CQ47418670 CAPACITUR FIXED FILM 0 47UF D 275 20 M PP NI R SAM WHA CMLCMe 50 ORD1001G609 RESISTUR FIXED CARBON FILM DHM 1 4 57 5 SMART RS 51 08210020609 RESISTUR FIXED CARBUN FILM 10K OHM 1 4 V 5 52 SMART R45 R46 51 06020016609 RESIST R FIXED CARBON FILM 2K OHM 1 4 57 TAS2 SMART R19 R38 52 0RD39016609 RESISTUR FIXED CARBON FILM 3 9K OHM 1 4 57 52 MART 15 53 08247010609 RESISTOR FIXED CARBON FILM 4 7K OHM 1 4 54 TAS2 SMART 54 ORDS603H609 RESISTUR FIXED CARBON FILM 560K OHM 1 2 57 52 SMART Re 55 ORHIO00L62e RESISTOR ME TAL GLAZED lt CHIP 100 OHM 1 7 8 57 2012 R TP ROHM R36 56 ORHIO0IL622 RESISTOR METAL GLAZE D lt CHIP 1 8 V 57 2012 ROHM R8 57 ORHI002L622 RESISTOR METAL GLAZEIKCHIP 10KDHM 178 5 201
36. ace parts by part number and model number Using an incorrect part could result in damage to the product fire injury or possibly death 4 2 6 Note for Using the PTC Starter 1 Be careful not to allow over voltage and over current 2 Do not drop or handle carelessly 3 Keep away from any liquid If liquid such as oil or water enters the PTC PTC materials may fail due to breakdown of their insulating capabilities 4 If the exterior of the PTC is damaged the resistance value may be altered This can cause damage to the compressor and result in a no start or hard to start condition 5 Always use the PTC designed for the compressor and make sure it is properly attached to the compressor Parts may appear physically identical but could have different electrical ratings Replace parts by part number and model number Using an incorrect part could result in damage to the product fire injury or possibly death 4 3 OLP OVERLOAD PROTECTOR 4 3 1 Definition of OLP 1 OLP OVERLOAD PROTECTOR is attached to the Compressor and protects the Motor by opening the circuit to the Motor if the temperature rises and activating the bimetal spring in the OLP 2 When high current flows to the Compressor motor the Bimetal works by heating the heater inside the OLP and the OLP protects the Motor by cutting off the current flowing to the Compressor Motor 4 3 2 Role of the OLP 1 The OLP is attached to the Sealed Compressor us
37. ay from F C 1 The temperature display can be toggled between F amp C by pressing the Refrigerator COLDER key and the Freezer COLDER Key at the same time and holding for more than one second 2 The initial setting is F Whenever the mode is changed the LED lights are changed 8 1 3 Control of freezer fan motor 1 Freezer fan motor has high and standard RPMs 2 High RPM is used when electricity is first on for express freezing and when refrigerator is overloaded Standard RPM is used for normal usage 3 Fan motor stops when refrigerator of freezer door opens 8 1 4 EXPRESS FREEZING 1 The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice 2 Whenever selection switch is pressed selection release the LED will turn ON or OFF 3 If there is a power cut and the refrigerator is power on again EXPRESS FREEZING function will be canceled 4 To activate this function you need to press the Express Freezing key and the LED will turn ON This function will remain activated for 24 hrs The first three hours the compressor and Freezer Fan will be ON The next 21hours the freezer will be controlled at the lowest temperature After 24 hours or if the Express Freezing key is pressed again the freezer will return to its previous temperature 5 For the first three hours notice the following cases 1 Compressor and freezer fan HIGH RPM continuously operate for three hours 2 If defrost
38. d Ice fifth LED is not on 6 Reset Mark Previous Status on Five seconds after fifth stage is completed TEST MODE the icemaker reset at initial status 7 3 DEFECT DIAGNOSIS FUNCTION 7 3 1 ERROR CODES shown on Ice Maker water supply control panel NO DIVISION INDICATOR CONTENTS REMARKS Mark time to Display switch 1 Normal supply None operates properly Ice Making Make sure that the wire 2 Sensor Open or short circuited wire on each sensor is malfunction connected Ice Maker Kit When ejector blades don t reach Check of 3 malfunction park position over 18 minutes HALL IC MOTOR m since Harvest Mode starts HEATER RELAY ERROR indicators in table can be checked only in TEST mode 19 8 DESCRIPTION OF FUNCTION amp CIRCUIT OF MICOM 8 1 FUNCTION 8 1 1 Function 1 When the appliance is plugged in it is set to 37 for Refrigerator and O for freezer You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button 2 When the power is initially applied or restored after a power failure it is automatically set to 37 amp 0 Better Model REFRIGERATOR TEMP EXPRESS FREEZER TEMP Tm T N c COLDER WARMER 37 F IS RECOMMENDED 0 F IS RECOMMENDED COLDER WARMER Control range 32 F 46 F Control range 6 F 9 F 0 8 C 21 C 13 C 8 1 2 How to Change the Temperature Displ
39. d in the s food placed in the cooling air outlet Place foods in the high temperature section Refrigerator front part is frozen Check if the control is set to colder position Set the control to Recommended position 15 the ambient temperature below 41 F 5 C Set the control to Warm position Condensation or ice forms inside the unit s liquid food sealed Check if food put in the refrigerator is hot Did you open the door of the unit too often or check if the door is sealed properly Seal liquid foods with wrap Put in foods after they have cooled down Don t open the door too often and close it firmly Condensation forms in the Exterior Case Check if the ambient temperature and humidity of the surrounding air are high s there a gap in the door gasket Wipe moisture with a dry cloth It will disappear in low temperature and humidity Fill up the gap There is abnormal noise s the unit positioned in a firm and even place Are any unnecessary objects placed in the back side of the unit Check if the Drip Tray is not firmly fixed Check if the cover of the compressor enclosure in the lower front side is taken out Adjust the Leveling Screw and position the refrigerator in a firm place Remove the objects Fix the Drip Tray firmly in the original position Place the cover in its original position Door does not close well Check
40. e RESET circuit allows all the functions to start at the initial conditions by initializing various parts including the RAM inside the MICOM IC1 when the power is initially supplied or the power supply to the MICOM is restored after a momentary power failure For the initial 10ms of power supply LOW voltage is applied to the MICOM RESET terminal During a normal operation 5V is applied to the RESET terminal If a malfunction occurs in the RESET IC the MICOM will not operate 26 8 2 4 Load Buzzer Drive amp Open Door Detection Circuit 1 Load Drive Condition Check ICE MAKER Ianas on Cow Lone str COOLING F AN CON2 7 DEF HEATER FUSE M LAMP F 40 DOOR S W F LAMP R 60W 2 DOOR S W R1 amp R2 CON3 3 DEW HEATER HEATER FRENCH DOOR HEATER1 FRENCH DOOR HEATER mm ALE15B12 MICOM 10 POG FRENCH DOOR LOAD TYPE COMP opens LAMP HEATER 1 2 DEW HEATER Measurement Location IC6 NO 12 NO 14 NO 15 NO 13 ON 1V or below Condition OFF 12V 2 Fan motor driving circuit freezing compartment fan 1 This circuit makes standby power 0 by cutting off power supplied to ISs inside of the fan motor in the fan motor OFF 2 This is a circuit to perform a temporary change of speed for the fan motor and applies DC voltage up to 7 5V 16V to motor 3 This circuit prevents over driving the fan motor by cutting off power applied to the fan motor in the lock o
41. ed for the Refrigerator It prevents the Motor Coil from being started in the Compressor 2 For normal operation of the OLP do not turn the Adjust Screw of the OLP in any way OVERLOAD PROTECTOR cross section Part 6 Customer part No Name number 1 Base phenolic Lot code UL 94 V 0 rated date cod TET 2 Movable arm support plated steel Mine 3 Stationary contact support part number plated steel Heater support plated steel N Heater resistance alloy Disc thermostatic alloy 2 Movable arm spring temper 3 E copper alloy 09 Contact movable silver on copper 8 Contact stationary silver on copper Slug plated steel Cover polyester UL 94 V Orated 42 Pin connector plated copper alloy To engage 2 33 2 66 mm dia pin 3 Quick connect terminal brass conforms to UL 310 MEMA DC 2 DIN 46344 Electrical characteristics part number Figure 13 4 4 TO REMOVE THE COVER PTC 1 Remove the Cover Back M C 2 Remove the screw on Cover PTC 3 Remove two Housings on upper part of Cover PTC 4 Take out the cover PTC from upper to lower position like 5 Turn 45 in the direction of and take it out 6 Assembly in reverse order of disassembly 5 CIRCUIT DIAGRAM BETTER MODEL LG Electronics CIRCUIT DIAGRAM PWB PCB ASSEMBLY DISPLAY
42. f fan motor by sensing the operation RPM of the fan moto r 8 part b part part MOTOR OFF 2V or less OV 5V MOTOR ON 13V 15V OV 2V 3V o CON4 13 fmm 5 P72 26 2 coe 25 2 31 R20 B RI9 4 7KJ e 2 E MICOM 27 2 Buzzer Drive Condition Check Q1 B zzeR KRC106 39 rT PPG R9 r 1 FH Bede C1 29 4 P66 R10x AIN6 220 MICOM 47uF 7 7 25 777 Condition Tone Ding Dong when the button on Alarm for open door FE Measure the display is pushed beep beep beep ment Location 10 055 025 1016 25 05s 0 56 IC1 i Sn OV ov i i 0v M 5V 0v 1 1 V IC1 2 63 kz Ding 221 kz Dong OV i 4 4 7 1 263kz Beep OFF gt 3 Open Door Detection Circuit Check CON5 R38 30 R37 2KJ m PETERE i O REFRIGERATOR DOOR 223 T T 12 0 SWITCH C 1 m CONG 27 R43 2KJ LO cel 2 FREEZER DOOR po eR MICOM 4 Sens 77 7 Measurement Freezer Location PIN NO 30 amp PIN NO 27 Refrigerator Door Closed 5V Open OV 28 8 2 5 Temperature Sensor Circuit
43. for example if high speed to normal speed or if normal speed to high speed for 30 seconds After 30 seconds it turns to its original RPM Demonstration MODE 1 When the KEY of refrigerator Temp control or of freezer Temp control is pushed and held over 5 seconds warmest temperature s It converts to Demonstration Mode 2 In this status each LED is rotated with 1 second interval 3 In this status all Loads are off Compressor Fan Damper Heater Even is Demonstration Mode the refrigerator Lamp automatic off function warks normally and can be demonstrated 4 It reset if you do again as clause 24 8 2 PCB FUNCTION 8 2 1 Power Circuit BD1 D3SBA60 TRANS hav gt ESSA CM2 R3 nd e C 470nF 56KJ CM 215 473 R2 2W 560k LT 630V R7 ZZ Bi 1 8KJ alg FB1 FR107 2 RU 12 Ic3 02 1 we FRI T ZZ FUSE 150K4 1W 220 240V RA 33J 250V 2A 5 B2KJ 1W 100 127V 42 47uF 4 50V 4 2 4KF 1 KIA431 4 3 3 1 L1 M MICOM 880 1 2 5 470nF CON1 275VAC STR 4 G6551 Rocp des VP Rn SY _22 1 3
44. nician Sealed system repair must be performed by a CFC certified technician 1 SPECIFICATIONS 21 cu ft 25 cu ft ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Opaque Drawer Type DIMENSIONS inches 35 3 4 X 30 x 69 3 4 WxDxH 21cu ft COMPRESSOR PTC Starting Type 35 3 4 x 34 1 4 x 69 WxDxH 25cu ft EVAPORATOR Fin Tube Type 278 21cu ft CONDENSER Wire Condenser NET WEIGHT pounds 302 25cu ft REFRIGERANT R 134a 115 9 COOLING SYSTEM Fan Cooling LUBRICATING OIL Freol 10G 310 cc TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE SHEATH HEATER DEFROSTING SYSTEM Full Automatic Heater Defrost REFRIGERATOR LAMP 60 W 2EA FREEZER 40 W 1EA DOOR FINISH Embossed Metal VCM Stainless HANDLE TYPE Bar INNER CASE ABS Resin INSULATION Polyurethane Foam 2 PARTS IDENTIFICATION Digital Sensor Control Refrigerator Light Shelves Design A Door Optibin Crisper Keeps fruits and vegetable fresh and crisp Glide N Serve Customcube Icemaker Ice Bin Durabase Divider I I I I 1 sessi Dairy Bin Egg Box Design A Door Wine Holder Design A
45. s Ice Making Mode after supplying water by operating the SOLENOID in ICE VALVE With the detect lever checks if the ICE BIN is full o ww ww v wv 1 Turning the Icemaker stop switch off O stops the ice making function 2 Setting the Icemaker switch to OFF and then turning it back on will reset the icemaker control 16 7 2 CONTROL METHOD ACCORDING TO FUNCTIONS 7 2 1 Start Position 1 After POWER OFF or Power Outage check the EJECTOR s position with MICOM initialization to restart 2 How to check if it is in place Check HIGH LOW signals from HALL SENSOR in MICOM PIN 3 Control Method to check if it is in place 1 EJECTOR is in place It is an initialized control so the mode can be changed to ice making control 2 EJECTOR isn t in place A If EJECTOR is back in place within 2 minutes with the motor on it is being initialized If not go to Step B B If EJECTOR is back in place within 18 minutes with the heater on to control Heater on its OFF condition it is being initialized If not it is not functioning Repeat Step B with Heater and Motor off 7 2 2 Ice Making Mode 1 Ice Making control refers to the freezing of supplied water in the ice trays Complete ice making operations by measuring the temperature of the Tray with Ice Making SENSOR 2 Ice Making starts after completing fulfilled ice control and initial control 3 The Ice Making function is completed when the sensor reaches 19 F 7 C 60 to
46. t run shorted Check Fan Motor Coil is shorted or open Heavy frost buildup on Check current flow in EVAPORATOR the following components Sensor Fuse M Check current flow in the Defrost Heater 12 Replace indicated component Replace gt indicated component Replace Open indicated component Replace Defrost Heater 6 4 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY No Cooling s the power cord unplugged from the outlet Plug into the outlet Check if the power switch is set to OFF Set the switch to ON Check if the fuse of the power switch is shorted Replace the fuse Measure the voltage of the power outlet f the voltage is low correct the wiring Cools poorly Check if the unit is placed too close to the wall Place the unit about 4 inches 10 cm from the wall Check if the unit is placed too close to the stove Place the unit away from these heat sources gas cooker or in direct sunlight s the ambient temperature too high or Lower the ambient temperature the room door closed Check if food put in the refrigerator is hot Put in foods after they have cooled down Did you open the door of the unit too often Don t open the door too often and close or check if the door is sealed properly it firmly Check if the Control is set to Warm position Set the control to Recommended position Foo
47. upply control KEY for 3 seconds 2 It operates in the Ice Making mode but not in the Ice Removing mode or water supply process If there is an ERROR it can only be checked in the TEST mode 3 If the water supply control KEY is pressed for 3 seconds in the Ice Making mode no matter what condition the Ice Making tray is in the Ice Removing operation starts immediately Water is not yet frozen so water is poured instead of ice If the control doesn t operate normally in the TEST mode check and repair as needed 4 After water is supplied the normal CYCLE is followed ice making Harvest Fill Park Position 5 When Stage 5 is completed in the TEST mode minimize MICOM in 5 seconds the time needed to supply water resets to the previous status in the TEST mode Diagnosis TABLE STAGE ITEMS INDICATOR REMARKS Five seconds after heater starts heater will 1 HEATER c go off if temperature recorded by sensor is 10 C or lever is up position Five seconds after heater starts you can 2 MOTOR confirm that motor is moving ES HALL IC I You can confirm Hall Ic detection of position 3 detection of position Two seconds after detection of initial 4 VALVE position you can confirm that valve is on Tes HALL IC II Ss You can check whether hall is sensing Full 5 detection of full ice condition If there is a full filled error the fille
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