LG LBC24360ST Service Manual
LG LBC24360ST Manual
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- LG LBC24360ST | Service Manual - Page 1
REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODELS: LDC24370ST /00 LDC24370SW /00 LBC24360ST / 00 LBC24360SW /00 - LG LBC24360ST | Service Manual - Page 2
. COMPRESSOR TROUBLESHOOTING 43 12. ICE MAKER AND DISPENSER 55 12-1 Operation principle 55 12-2 icemaker functions 56 13. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 59 14. EXPLODED VIEW 64 SAFETY PRECAUTIONS Please read the following instructions before servicing your refrigerator. 1. Check - LG LBC24360ST | Service Manual - Page 3
FEATURES MODELS FREEZER REFRIGERATOR SPECIFICATIONS Color Dimensions (W*D*H) Net Weight Capacity Refrigerant Drawer (F/U) Tray Drawer (F/C) Tray Drawer (F/L) LDC24370ST /00 LDC24370SW /00 LBC24360ST / 00 LBC24360SW /00 Stainless Steel Stainless Super White Stainless Steel (32 3/4 x 34 - LG LBC24360ST | Service Manual - Page 4
2. PARTS IDENTIFICATION J A B K C L D E F M G H N I O P A Digital Sensor Control B Refrigerator Light C Refrigerator Shelves (split) D Refrigerator Shelf (full) E E Humidity Controlled Crispers F Pantry G Icemaker* H Ice Bin I Durabase Divider J Dairy Bin K Fold-Up Door Bin L Door Bins - LG LBC24360ST | Service Manual - Page 5
I A B J C K D E L F G M H N O A Digital Sensor Control B Refrigerator Light C Refrigerator Shelf (full) D Humidity Controlled Crispers E Pantry F Icemaker* G Ice Bin H Durabase Divider I Dairy Bin J Fold-Up Door Bin K Door Bins L Condiment Bin M Freezer Light N Pull out - LG LBC24360ST | Service Manual - Page 6
socket wrench, remove the 3 bolts and lift off the Top Hinge(3). Set parts aside. Press gasket into channels on the four remaining sides of door. IMPORTANT other objects into the air vents, base grille, or bottom of the refrigerator. You may be injured or receive an electrical shock. Be careful - LG LBC24360ST | Service Manual - Page 7
the space between your doors is uneven, follow the instructions below to align the doors. Defrost Control assembly consists . Socket wrench or open-end wrench. Have someone the Heater when defrosting. hold the refrigerator door so that the space between the two door is even, and tighten the top - LG LBC24360ST | Service Manual - Page 8
Refrigerator Compartment Lamp 1) Unplug refrigerator power cord from electric outlet. 2) Put flat screwdriver into service hole and remove cover of refrigerator the PWB cover. Figure 3 3-6-2 Freezer Compartment Lamp 1. Unplug refrigerator power cord form outlet. 2. Remove screw with driver. 3. - LG LBC24360ST | Service Manual - Page 9
1) Open the freezer door. Step 2) Remove the lower basket. Step 3) Remove the two screws from the guide rails (one from each side). Step 4) Lift the freezer door up to unhook it from the rail support and remove. Pull both rails to full extension. Step 5) First : Remove the gear from the left - LG LBC24360ST | Service Manual - Page 10
into the freezer section. Pull the rails back out to full extension. Step 5) Reinstall the freezer door by inserting the rail tabs into the guide rail. Step 6) Reinstall the two screws into the guide rails (one from each side). Step 7) Reinstall the lower basket, and close the freezer door. 10 - LG LBC24360ST | Service Manual - Page 11
3-10 PULL OUT DRAWER Top Drawer 1. To remove the Top drawer. Pull the drawer out to full extension. Lift the front of the drawer up, then pull it straight out. 2. To install, slightly tilt up the front and insert the drawer into the frame and push it back into push it back place. 11 - LG LBC24360ST | Service Manual - Page 12
Drawer model) 4-1-1 Role The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses - Current Trip Current trip is set in order to protect compressor mechanical part and drive from the overcurrent that might arise during the operation. Check - LG LBC24360ST | Service Manual - Page 13
Freezer Swing model) 4-2-1 Role The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses Parts may appear physically identical but could have different electrical ratings. Replace parts by part number and model number. Using an incorrect part - LG LBC24360ST | Service Manual - Page 14
Compressor used for the Refrigerator. It prevents the part number 12345678 -S1 BOX98 Customer part number Lot code/ date code Physical termination part number Part No. Name Base, phenolic (UL 94 V-0 rated) Movable arm support, plated steel. Stationary contact support, plated steel Heater support - LG LBC24360ST | Service Manual - Page 15
5. CIRCUIT DIAGRAM 15 - LG LBC24360ST | Service Manual - Page 16
16 - LG LBC24360ST | Service Manual - Page 17
6. PCB PICTURE 6-1 Main PCB P/No & MFG Drawer EBR770425** (2013.05~) CON7 CON8 Picture CON201 CON5 Swing EBR766714** (2013.05~) CON7 CON9 CON4 CON5 CON3 CON2 CON8 CON3 CON1 CON1 17 - LG LBC24360ST | Service Manual - Page 18
6-2 Display PCB & Sub PCB P/No Picture CON01 EBR766839** (2013.05~) 18 - LG LBC24360ST | Service Manual - Page 19
from CON7. 2-. Check resistance between wires Blue/White to Blue/White. Result 0Ω Short OFF Open Other Normal SVC Action Change the sensor Replace the refrigerator Check the Temp and resistance (Table-1) Temperature Result -22°F / -30 - LG LBC24360ST | Service Manual - Page 20
from CON7. 2-. Check resistance between wires White to White. Result & SVC Action Result 0Ω Short OFF Open Other Normal SVC Action Change the sensor Replace the refrigerator Check the Temp and resistance (Table-2) Temperature Result - LG LBC24360ST | Service Manual - Page 21
between wires Red to Orange. 1-. Unplug connector from CON4. 2-. Check resistance between wires Red to Orange. Result & SVC Action Result 0Ω Short OFF Open Other Normal SVC Action Change the sensor Replace the refrigerator Check the Temp and resistance (Table - LG LBC24360ST | Service Manual - Page 22
Other Normal SVC Action Change the sensor Replace the refrigerator Check the Temp and resistance (Table-3) 2.- Check Unplug connector from CON7. 4-. Check resistance between wires Brown to Brown. Temperature Result 23°F / -5°C 38.5 ~ 36.5 ㏀ - LG LBC24360ST | Service Manual - Page 23
Part Result SVC Action 2 1.- Check for loose connection in defrost control part connector. Fuse-M 0Ω Other Go to the 3 Change Fuse-M 2-. Check resistance of defrost control part wires Blue to Red. Result 112 ~ 116 V 0 V SVC Action Go to the 5 Replace Main PCB < - LG LBC24360ST | Service Manual - Page 24
7-5 Defrost Heater Error (dH E) No Checking flow 6 Check voltage between wires Blue to Red. Result & SVC Action Result 0 V 112 ~ 116 V SVC Action Explain to customer Replace Main PCB 24 - LG LBC24360ST | Service Manual - Page 25
. It feel sticky, change the motor. (Cause of ice or rust inside of motor) 4 1.- Check for loose connection in CON7. 2-. Check fan motor voltage. Point (2)~(3) (1)~(3) Result Below 7V 0 or 5 V SVC Action Change the PCB Change the motor (3)(2)(1) - LG LBC24360ST | Service Manual - Page 26
Go to the 4 Rotate fan using your hand. It feel sticky, change the motor. 4 1.- Check for loose connection in CON7. 2-. Check condenser motor voltage. (2)~(3) (1)~(3) Result Below 7V 0 or 5 V SVC Action Change the PCB Change the motor (3)(2)(1) - LG LBC24360ST | Service Manual - Page 27
to Purple. CON101 1.- Check for loose connection in CON5 5 from Main PCB. 2.- Check voltage between wires Blue to Yellow. Result & SVC Action Result 12 V Other SVC Action Go to the 3 Check the Hinge (loose connection) Change the Main PCB Result 0 V or - LG LBC24360ST | Service Manual - Page 28
7-8 Communication Error (CO E) No Checking flow 6 Check voltage between wires Blue to Purple. Result & SVC Action Result 0 V or 5 V Other SVC Action Change the Main PCB Explain to customer 28 - LG LBC24360ST | Service Manual - Page 29
8. TROUBLESHOOTING WITHOUT ERROR DISPLAY 8-1 Freezer room LED Lamp doesn't work No Checking flow 1 Check the Freezer door switch. Result & SVC Action If feel sticky, Change the door s/w. 2 Check the door S/W resistance. 3 1.- Check for loose connection in CON8. 2-. Check - LG LBC24360ST | Service Manual - Page 30
room LED Lamp doesn't work No Checking flow 1 Check the Refrigerator door switch. Result & SVC Action If feel sticky, Change the door s/w. 2 Check the door Switch resistance. 3 1.- Check for loose connection in CON8. 2-. Check voltage between wires Black to Gray/Red - LG LBC24360ST | Service Manual - Page 31
room lamp doesn't work No Checking flow 4 1.- Check for loose connection in Refrigerator LED Lamp connector. 2-. Check voltage between wires White to Gray. Result & SVC Action Status Closed Open Result 0 ~ 2 V Other 12 V Other SVC Action Explain to customer - LG LBC24360ST | Service Manual - Page 32
cooling in Fresh food section No Checking flow 1 1-. Unplug connector from CON7. 2-. Check resistance between wires White to White. Result & SVC Action Temperature 23°F °C 32°F °C 41°F °C 50°F °C 59°F °C Result 38 30 24 19.5 16 The sensor is determined by - LG LBC24360ST | Service Manual - Page 33
compartment No Checking flow 1-. Unplug connector from CON7. 1 2-. Check resistance between wires Blue/White to Blue/White. Result & SVC Action Temperature -22°F °C -13°F °C -4°F °C 5°F °C 14°F °C 23°F °C 32°F °C Result 40 30 23 17 13 10 8 The - LG LBC24360ST | Service Manual - Page 34
). Result & SVC Action Point Motor Result Sticky SVC Action Change the motor 6 1.- Check for loose connection in CON7. 2-. Check fan motor voltage. Point (1) ~ (2) (1) ~ (3) Result Below 12 V 0 or 5 V SVC Action Change the PCB Change the motor (3) (2) (1) - LG LBC24360ST | Service Manual - Page 35
TEST MODE If you push the test button on the Main PCB, the refrigerator will be enter the TEST MODE. * 1 time : Comp / Damper / All FAN on (All things displayed) Main PCB * 2 times : Damper closed (22 22 displayed) * 3 times : Forced defrost mode (33 33 displayed - LG LBC24360ST | Service Manual - Page 36
9-2 TEMPERATURE CHART - FRZ AND ICING SENSOR TEMP -39°F (-40°C) -30°F (-35°C) -21°F (-30°C) -13°F (-25°C) -4°F (-20°C) 5°F (-15°C) 14°F (-10°C) 23°F (-5°C) 32°F (0°C) 41°F (5°C) 50°F (10°C) 59°F (15°C) 68°F (20°C) 77°F (25°C) 86°F (30°C) 95°F (35°C) 104°F (40°C) RESISTANCE 73.29 ㏀ 53.63 ㏀ 39.66 ㏀ - LG LBC24360ST | Service Manual - Page 37
9-3 TEMPERATURE CHART - REF AND DEF SENSOR TEMP -39°F (-40°C) -30°F (-35°C) -21°F (-30°C) -13°F (-25°C) -4°F (-20°C) 5°F (-15°C) 14°F (-10°C) 23°F (-5°C) 32°F (0°C) 41°F (5°C) 50°F (10°C) 59°F (15°C) 68°F (20°C) 77°F (25°C) 86°F (30°C) 95°F (35°C) 104°F (40°C) RESISTANCE 225.1 ㏀ 169.8 ㏀ 129.3 ㏀ 99 - LG LBC24360ST | Service Manual - Page 38
9-4 HOW TO CHECK THE FAN-ERROR After sending a signal to the fan, the MICOM checks the BLDC fan motor s lock status. If there is no feedback signal from the BLDC fan, the fan motor stops for 10 seconds and then is powered again for 15 seconds. To determine that there is a fan motor malfunction, this - LG LBC24360ST | Service Manual - Page 39
Controller assembly is consist of 2 kinds of part those are fuse-m and sensor. we can decide part is defect or not when we check the Sensor is not a defect. When check the ohm at other temperature Check the sensor manual. Standard Fuse-M (at all temperature) Test Point Ressult (1) to (2) 0 ~ - LG LBC24360ST | Service Manual - Page 40
defrost. All heating wire is connected to only one line. So we can decide part is defect or not when we check the resistance. How to Measure Standard Set a ohmmeter connect to The 2 housing pin. Measure the 2 pin connected to - LG LBC24360ST | Service Manual - Page 41
10-3 Damper Function The damper supplies the cold air from the freezer to the refrigerator section. How to Measure 1 Blue 2 Red < Damper Circuit > 1 Blue 3 White 3 White 3 Yellow Check the 1 , 3 < extension > Check the 2 , 4 Check the 1 , 3 Check the resistance between connectors 1,3 - LG LBC24360ST | Service Manual - Page 42
Micom. When the door open, internal contact operate on and off moving plunger of door switch up and down. Button (Plunger) 12 34 1 2 34 34 21 Standard Beep Beep Check the resistance between connectors 1, 2 and 3, 4 .It means check whether or not - LG LBC24360ST | Service Manual - Page 43
TDC (Full Stroke) Display & sound Display ON, Buzz 1 time Refer Troubleshooting Not Cooling Recheck Reset LED Y Blink? N LED blink 1 LED Comp. N Work? Harness Y Check? Y N Fix Harness Heavy Repair Y Refrigerant N leak? Recheck Comp. N Check? Reset LED blink6 Comp. N Work? - LG LBC24360ST | Service Manual - Page 44
the source voltage of the driver PC board. Step1. Open PCB Cover Step2. Check Driver PCB * Driver PCB located in back plate cover behind the refrigerator. LED Lamp IPM Output check - Measure the voltage between the POWER and COMM pins of the connector as shown below. Check to make sure compressor - LG LBC24360ST | Service Manual - Page 45
compressor works intermittently and LED blinks - Cause: Condenser Fan or Freezer Fan is not running. Sealed system problem such as moisture restriction, restriction at capillary tube or refrigerant leak. - Logic: Compressor is forced to off and then tries to restart after 1 minute. Protection logic - LG LBC24360ST | Service Manual - Page 46
Blink Blink Blink Blink Blink OFF - Purpose: Prevent over-current (overload protect) - Cause: Ambient temperature is high (over 43°C) and/or refrigerator's condenser air movement is restricted. - Condenser Fan is stopped, restricted discharge line, compressor is damaged, or IPM device is defective - LG LBC24360ST | Service Manual - Page 47
B5. LED blinks seven times, then repeats Blink Blink Blink Blink Blink Blink Blink OFF - Purpose: Prevent high current due to IPM Short - Cause: Damaged IPM (Dead Short) - Test for a dead short at Point A with a VOM. - Logic: Compressor is forced off and tries to restart in 20 seconds. Protection - LG LBC24360ST | Service Manual - Page 48
Compressor N Y Check Compressor terminals Harness Problem Caution : Turn off power during check C - Measure the resistance at each point except point C - Dead short check: measure the resistance between power line in compressor and earth ground in refrigerator (Inf. Ohm) Multi Tester Multi - LG LBC24360ST | Service Manual - Page 49
by other problems then the driver or compressor. High Pressure Side Restricted → When process line on compressor is opened, and refrigerant is not where the suction line enters the compressor.. Current trip Low side Refrigeration leak Refrigerant leak → Temp. of compressor and discharge line - LG LBC24360ST | Service Manual - Page 50
Compressor Troubleshooting WARNING HIGH VOLTAGE Step 1) Open PCB cover Step 2) Check for blinking frequency of LED and PCB LED Lamp When compressor is normal, it does not blink : Refer to the next page to find out what actions to take according to how many times LED blink 50 - LG LBC24360ST | Service Manual - Page 51
condition LED two - time repetiton (Stroke Trip) 1 on - on - off - on - on - off - on - on - off repeating Cause Service guideline 1. Please check, Whether PCB Parts defect or Compress or Connector miss connecting (Piston over run) connector of compressor is attached rightly or not. after - LG LBC24360ST | Service Manual - Page 52
high-temperature section. (front part) • Set the control to low temperature and humidity. • Fill up the gap. • Adjust the Leveling Screw, and position the refrigerator problems: Check if frost forms in the freezer. Not defrosting Check Components of the defrosting circuit. Check the refrigeration - LG LBC24360ST | Service Manual - Page 53
not heard and there is no frost. Equal to ambient temperature. • Low pressure at high side of compressor due to low refrigerant level. • No pressure in the high pressure part of the compressor. 12-6-1 Cleaning There is no need for routine condenser cleaning in normal Home operating environments - LG LBC24360ST | Service Manual - Page 54
Not Cooling" Complaint All components operating, No airflow problems, Not frosted up as a defrost problem problem has been isolated to sealed system area Partial Temperature Hotter than Normal Faint Cap Tube Sound Room Temperature Air/Low Side Leak Trace of Oil Yes None to Weak Loss of Change - LG LBC24360ST | Service Manual - Page 55
if ice bucket is not full. • Performs Icemaking Mode after supplying water by operating the SOLENOID in ICE VALVE. • To operate LINE and SERVICE, press and hold the Fill Key for 3 seconds. The icemaking will run through 3 stages: Harvest → Fill → Icemaking. 1. Turning the Icemaker stop switch off - LG LBC24360ST | Service Manual - Page 56
and ice is separated from the TRAY and ice checking lever raises. d) Ice ejection motor stops for 1 second if HALL SENSOR signal changes from OFF (low) to ON (high) after 3.6 seconds when ice ejection motor rotates in normal direction. If there is no change in Hall IC signals within 1 minute after - LG LBC24360ST | Service Manual - Page 57
Bank is not full ON HALL Sensor Output Signals OFF Bank is full ON HALL Sensor Output Signals OFF Ice checking AXIS LEVEL 30° Ice checking AXIS -8°-0° -10° Lock -32° -41° -53° -58° -80° Icemaking original point A Horizontal Conditions B 2±1 sec 9±3 sec 8±3 sec MAXIMUM TILTING POINT -160° - LG LBC24360ST | Service Manual - Page 58
Test Icemaker Mode Test function starts when test switch is pressed for more than 3 seconds. User shouldn't force operation while doing test mode, service or cleaning. Test switch will work only when ice tray its in horizontal position, not during ice ejection or water supplying. When pressing the - LG LBC24360ST | Service Manual - Page 59
the amount of ice. 2. Whenever selection switch is pressed, selection/release, the icon will turn ON or OFF. 3. If there is a power outage and the refrigerator is powered on again, ICE PLUS will be canceled. 4. To activate this function you need to press the ICE PLUS key and the icon will - LG LBC24360ST | Service Manual - Page 60
each for 1/2 second. These tones repeat every 30 seconds. 3. The alarm is cancelled when the freezer or the refrigerator is closed while the buzzer sounds. Freezer Door or Refrigerator Door Closed Open Closed Open Closed 3 Times 3 Times 3 Times 3 Times Buzzer Within 1 min. 1 min. 30 sec 30 - LG LBC24360ST | Service Manual - Page 61
on in the following order to prevent noise and parts damage. Several parts are started at the same time at initial power purchased or when moved) sensor is lower than 45°C (during power outages or for service) ORDERS Power ON in 0.5 sec. Compressor ON in 0.5 sec. Freezer fan ON Models. 61 - LG LBC24360ST | Service Manual - Page 62
Diagnosis Function 1. Automatic diagnosis makes servicing the refrigerator easy. 2. When a defect occurs, the buttons will not operate. 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. ERROR CODE on - LG LBC24360ST | Service Manual - Page 63
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 test . * Demonstration (Display) MODE: 1. To enter this mode, press and hold Refrigerator Temp button and Ice Plus button for 5 seconds. 2. The LED panels will - LG LBC24360ST | Service Manual - Page 64
#EV# 14. EXPLODED VIEW SWING CASE PARTS Caution: Use the part number to order part, not the position number. 103B 281A 103A 282E 402A 281B 503F 501F 903D 120A 282F 145A 501A 411A 410G S38 282B 409C 128E 158E 301A - LG LBC24360ST | Service Manual - Page 65
#EV# FREEZER PARTS Caution: Use the part number to order part, not the position number. SWING 133B 131A 145F 133A 136B 133B 145C 133A 237C 128F 128E 136D 65 - LG LBC24360ST | Service Manual - Page 66
#EV# REFRIGERATOR PARTS Caution: Use the part number to order part, not the position number. 143A SWING 143A 145J S13 S38 145H 128B 167B 151C 151B S13 S38 145G 154A 151A 154B 133C 155B 160B 128A 170A 66 - LG LBC24360ST | Service Manual - Page 67
#EV# DOOR PARTS Caution: Use the part number to order part, not the position number. 241F 230A 233A 231A 212G 241E 237A 241C 237A 244A 244E SWING 241C 241D 243B 243A 286A 281E 203A 201A 200A 286A 243B 243A 286A 67 - LG LBC24360ST | Service Manual - Page 68
#EV# ICEMAKER PARTS Caution: Use the part number to order part, not the position number. 600A 627A 619C 68 - LG LBC24360ST | Service Manual - Page 69
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MODELS:
REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LDC24370ST /00
LDC24370SW /00
LBC24360ST / 00
LBC24360SW /00