LG ASBCNA0 Service Manual Download Page 34

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rights reserved. Only training and service purposes.

CON7

CN1

CON201

CON2

CON1

CON3

CON5

CON6

CON203

CON10

Symptom

Check Point

1. E rS

1. Check for a loose connection
2. Check Sensor Resistance

Resistance [Ω]

CON7
15

pin & 16

Short

Open

OFF

Other

Normal

CON7
15

pin & 16

Resistance [Ω]

23ºF / -5ºC

38k

32ºF / 0ºC

30k

41ºF / 5ºC

24k

50ºF / 10ºC

19.5k

59ºF / 15ºC

16k

CON7

8-2. Refrigerator Sensor Error (E rS)

Summary of Contents for ASBCNA0

Page 1: ...bution including by way of email facsimile or other electronic means publication modification copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition includes without limitation any text graphics or logos in this Service ...

Page 2: ... REINSTALL THE HOMEBAR 19 HOW TO REMOVE AND REINSTALL THE HOMEBAR DOOR 20 HOW TO REMOVE AND REINSTALL THE DOOR FOAM ASSEMBLY REFRIGERATOR 21 HOW TO REMOVE FRAME DOOR SWITCH OF DOOR FOAM 22 HOW TO REMOVE THE CASE HOME BAR 23 HOW TO REMOVE AND REINSTALL THE COVER ASSEMBLY PCB 24 HOW TO REMOVE AND REINSTALL THE CASE ASSEMBLY LAMP 25 4 ADJUSTMENT 26 COMPRESSOR 26 5 CIRCUIT DIAGRAM 27 6 TROUBLESHOOTING...

Page 3: ...Polyurethane Foam SPECIFICATIONS 29 6 cu ft VEGETABLE TRAY COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DEFROSTING DEVICE ITEMS Clear Drawer Type Linear Fin Tube Type Spiral Condenser R 134a 135 g ISO10 280 ml SHEATH HEATER LED Module LED Module SPECIFICATIONS LAMP REFRIGERATOR FREEZER DIMENSIONS Depth w Handles Depth w o Handles Depth w o Door Depth Total with Door Open Height to T...

Page 5: ...inge lever latch 8 7 Lift door from middle hinge pin and remove door 8 Place the door with the insides facing up on a not scratch surface CAUTION When lifting hinge free from the latch be careful that door does not fall forward Right Door FIG 3 1 Open the door Loosen top hinge cover screw 1 Lift up cover 2 2 Disconnect door switch wire harness 3 3 Remove the grounding screw 4 4 Rotate hinge lever ...

Page 6: ... 3 2 DOOR ﾜ Mullion Removal 1 Remove 2 screws ﾜ Door Gasket Removal 2 Lift mullion up carefully 3 Disconnect wire harness ﾜ Door Gasket Replacement 1 Insert gasket into channel Insert and press gasket into channels at doorliner 2 Insert mullion into channel Insert the mullion into channel at door as shown below ﾜ Mullion Replacement 1 Connect wire harness 3 Assemble 2 screws Gasket Gasket Channel ...

Page 8: ...f the Heater when defrosting 1 Pull out the grille assembly Figure 1 2 Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap Figure 2 3 4 Door Alignment If the level of refrigerator doors is uneven follow the instructions below to align the doors Turn the leveling legs CW to raise or CCW to lower the height of the front of the ...

Page 9: ... 4 Use a flat blade screwdriver as shown below to remove the cover lamp 5 To remove the LED Assembly open the Hook part to pull it out as shown in the following picture Cover lamp Case lamp LED Assembly 3 To remove the case lamp and cover lamp release another 2 screws as following picture 3 7 2 Refrigerator Light Side 1 Unplug refrigerator power cord from electric outlet 2 Put flat screwdriver int...

Page 10: ...r to need diassembly 3 Put flat screwdriver into service hole remove the cover of cap decor LED LAMP 5 Replace LED assembly 6 Assembly the cover in reverse order 4 Remove the LED assembly from connector 1 Remove 2 screws and guide rail 2 Remove the upper and lower Caps by using a flat screwdriver and remove 2 screws as shown figure 3 Disconnect the lead wire on the bottom position 4 Grip both side...

Page 11: ... 9 DISPENSER 1 Pull out the drain 2 Holding the inner side of the dispenser pull forward to remove 3 10 DISPLAY PCB As shown below remove the Display PCB fixing screws 3 11 ICE BUTTON ASSEMBLY 1 Remove the 1 screw holding the lever 2 Remove the spring from the hook 3 Push and pull on the tab to remove CAUTION When replacing the dispenser cover make sure the lead wire does NOT come off and the wate...

Page 12: ...motor check the position of the door duct and the link for proper fit Link Duct Door Cap Duct Motor NG Position 2 Unscrew 3 screws to disassemble the motor 4 Insert 3 screws 5 Push housing aside 12 3 14 Icemaker replacement 1 Remove 3 screws marked in the picture below 2 Grasp the bottom of motor cover assembly and pull it out slowly to remove 3 Disconnect wire harness from wall of compartment ...

Page 13: ...BIN 1 Grip the handles as shown in the picture 2 Lift the lower part slightly 3 17 HOW TO PLACE ICE BIN IN POSITION 1 Insert the Ice Bin slightly tilting it to avoid touching the Icemaker Especially Ice Detecting Sensor Note Before remove ice bin put on clean golves for keeping clean ice bin 3 Take the Ice Bin out slowly ...

Page 14: ...the freezer door Step 3 Remove the two screws from the guide rails one from each side Step 2 Remove the lower basket Step 4 Removal of the freezer door is done by l ifting clear of the rail support Fully extend both rails Step 5 Remove only 1 screw of gearice and disassemble the bar and gearice Step 6 Remove 2 screws of both side of supporter covers tv and disassemble the supporter cover tv ...

Page 15: ...tem will align itself by pushing the rails all the way into the freezer section Pull the rails back out to full extension Step 7 Reinstall the two screws into the guide rails one from each side Step 1 Insert both side of supporter cover tv into connector rails and then screw them Step 2 Assemble a bar and gear ice with screw Push the otherside of the gear to inside of the bar Step 3 Put gear ice a...

Page 16: ...d 1 screw from the valve 3 Separate the housing and remove the valve 4 Remove the clip and press the collet to separate the tube from the connector Note there maybe some water in the line Mechanical Cover Housing 2 Remove the screw from shroud and Separate the Fan motor assembly and Shroud Assemble in reverse order Taking care to avoid 1 Do not to bend the tube during assembly 2 Press the Water Di...

Page 17: ... you can lift the tray up and out 2 Pull both rails out to the full extension and insert the insert the back of the tray into both rails Then set the front of the tray into the rail and push it until you hear it click into place Middle Drawer 1 To remove the middle 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 t...

Page 18: ... picture of refrigerator R Evaporator F Evaporator The 3 way valve has plastic parts inside so always wrap it with a wet cloth before servicing when using a torch 1 Always replace the 3 way valve if there is a leak at any one of the 3 tubes coming from it 2 Service in replacement of valve valve failure Perform service in the same method as above Note To service sealed system follow the directions ...

Page 19: ... the desired support and push down until it snaps into place NOTE Some Home Bar may vary in appearance and will only fit in one location 3 24 3 DOOR BASKET OF HOME BAR The Door Baskets of Homebar are removable for easy cleaning and adjustment 1 To remove the Door Baskets of Homebar simply lifts the Door Baskets of Homebar up and pulls straight out 2 To replace the Door Baskets of Homebar slides it...

Page 20: ...ghts reserved Only training and service purposes 20 3 25 HOW TO REMOVE AND REINSTALL THE HOMEBAR DOOR 1 Loosen top hinge cover screw 3 Remove three Screws on the Top of Frame Door 2 Disconnect door switch wire harness 4 Pull Frame Door up and out ...

Page 21: ...and service purposes 21 3 26 HOW TO REMOVE AND REINSTALL THE DOOR FOAM ASSEMBLY REFRIGERATOR 1 Remove the Screw of Right Hinge Cover 2 Remove two Wire connectors 3 Rotate the hinge lever clockwise 5 Pull THE DOOR FOAM ASSEMBLY REFRIGERATOR up and out 4 Separate the Home Bar ...

Page 22: ...nly training and service purposes 22 3 27 HOW TO REMOVE FRAME DOOR SWITCH OF DOOR FOAM 1 Remove screws on hinge assebmbly Upper 2 Separate the Cap decor on the frame door 4 Remove a wire connector for change 3 Press the hook of door switch Then pushes it outward ...

Page 23: ...es 23 3 28 HOW TO REMOVE THE HOME BAR DOOR 1 Remove the screw located on the top of hinge 2 Remove the cap hinge upper 4 Pull out the bar thought the top hinge 3 Remove the bar by pushing it up from the bottom through the SVC hole bottom hinge Cap Hinge Upper 5 Separate the Cover Bar SVC Hole ...

Page 24: ...MOVE AND REINSTALL THE COVER ASSEMBLY PCB 1 Open the Home bar 2 Remove the gasket from gasket channel at doorliner as shown in the illustration below 4 Using the lever principle Insert the Small Screw Driver applies a force to hole 5 Disconnect wire harness 3 Remove a Screw 6 Remove a screw Gasket Channel Gasket ...

Page 25: ... Home bar When servicing the LEDs Cover Lamp is positively necessary 2 Tighten a screw to the cover 4 1 Push the flat screwdriver in the rear of the LED lamp and take the lamp out from the hook 2 Disassemble the combined housing with the flat screwdriver 3 You should take LED lamps out and pull from the right 3 Pull a screw using a Plier and disassemble the cover ...

Page 26: ... fault Trip It occurs if FO signal received from IPM is LOW For every 416 7us check whether FO signal is LOW The trip occurs if it is found three times during the five periods 83ms 4 1 1 Role 4 1 COMPRESSOR 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...

Page 30: ...Inc All rights reserved Only training and service purposes P N EBR78940631 P P P N EBR78940631 7 1 Main PCB 7 2 Display PCB CON3 P N EBR79159716 CON101 CON102 CON802 CON103 CON7 CN1 CON201 CON2 CON1 CON3 CON5 CON6 CON203 CON10 7 PCB Picture ...

Page 32: ...N203 CON10 Symptom Check Point 1 E FS 1 Check for a loose connection 2 Check Sensor Resistance Resistance Ω CON7 17th pin 18th pin Short 0 Open OFF Other Normal CON7 17th pin 18th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 5ºF 15ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k CON7 8 1 Freezer Sensor Error E FS 8 Trouble Shooting ...

Page 33: ...or Yes No 2 Check the Sensor resistance Is resistance 0Ω Sensor short Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Go to 6 4 Check the Temperature and resistance refer to the table No problem No 5 Explain to customer Check the sensor connection Is the sensor connection normall 7 6 Yes No Reconnect or repair the connector Replace the refrigerator Yes C...

Page 34: ...1 CON3 CON5 CON6 CON203 CON10 Symptom Check Point 1 E rS 1 Check for a loose connection 2 Check Sensor Resistance Resistance Ω CON7 15h pin 16th pin Short 0 Open OFF Other Normal CON7 15th pin 16th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON7 8 2 Refrigerator Sensor Error E rS ...

Page 35: ... sensor Yes No 2 Check the Sensor resistance Is resistance 0Ω Sensor short Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Go to 6 Check the Temperature and resistance refer to the table No problem Yes Explain to customer 7 6 Yes No Reconnect or repair the connector Replace the refrigerator No Change the Sensor 5 4 Check the sensor connection Is the sens...

Page 36: ...N5 CON6 CON203 CON10 Symptom Check Point 1 E IS 1 Check for a loose connection 2 Check Sensor Resistance Resistance Ω CON5 11th pin 12th pin Short 0 Open OFF Other Normal CON5 11th pin 12th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k CON5 5ºF 15ºC 8 3 Icing Sensor Error E IS ...

Page 37: ...Yes No 2 Check the Sensor resistance Is resistance 0Ω Sensor short Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Go to 6 4 Check the Temperature and resistance refer to the table No problem Yes 5 Explain to customer 7 6 Yes No Reconnect or repair the connector Replace the refrigerator Yes Change the Sensor Check the sensor connection Is the sensor conn...

Page 38: ...CON5 CON6 CON203 CON10 Symptom Check Point 1 F dS 1 Check for a loose connection 2 Check Sensor Resistance Resistance Ω CON7 19th pin 20th pin Short 0 Open OFF Other Normal CON7 19th pin 20th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k DefrostController CON7 8 4 Defrost Sensor Error F dS ...

Page 39: ...r Yes No 2 Check the Sensor resistance Is resistance 0Ω Sensor short Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Replace the refrigerator 4 Check the Sensor resistance Is resistance normal Yes 5 Check the Temperature and resistance refer to the table No problem Yes 6 Explain to customer CON7 19th pin 20 thpin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41...

Page 40: ...CON5 CON6 CON203 CON10 Symptom Check Point 1 r dS 1 Check for a loose connection 2 Check Sensor Resistance Resistance Ω CON7 13th pin 14th pin Short 0 Open OFF Other Normal CON7 13th pin 14th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k DefrostController CON7 8 5 Defrost Sensor Error r dS ...

Page 41: ...r Yes No 2 Check the Sensor resistance Is resistance 0Ω Sensor short Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Replace the refrigerator 4 Check the Sensor resistance Is resistance normal Yes 5 Check the Temperature and resistance refer to the table No problem Yes 6 Explain to customer CON7 13th pin 14th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41...

Page 42: ...6 CON203 CON10 Symptom Check Point 1 F dH 1 Check the door gasket 2 Check the Defrost Heater 3 Check the PCB output voltage Part Resistance Ω FUSE M 0 Defrost Heater 1 62 70 2 144 167 Defrost Sensor 22k TEST MODE 3 Voltage V CON3 6th pin 10th pin 112V 116V TEST MODE 1 Voltage V CON3 6th pin 10th pin 0V CON3 8 6 Defrost Heater Error F dH ...

Page 43: ...eater Voltage Is voltage 112 116V Yes 3 Check the Defrost control part Is Defrost Sensor resistance 22kΩ or OFF OFF 22kΩ Replace product Input Test 3 Mode Push the button 3 times 1 Check the input Voltage 2 Replace Main PCB TEST MODE 3 Voltage V CON3 6h pin 10th pin 112V 116V 5 Check the Heater Voltage Is voltage 0V Yes Input Test 1 Mode Push the button 1 times Replace Main PCB No No TEST MODE 1 R...

Page 44: ...203 CON10 Symptom Check Point 1 r dH Part Resistance Ω FUSE M 0 Defrost Heater 103 119 Defrost Sensor 22k TEST MODE 3 Voltage V CON3 6th pin 9th pin 112V 116V DefrostController TEST MODE 1 Voltage V CON3 6th pin 9th pin 0V CON3 k Go 1 Check the door gasket 2 Check the Defrost Heater 3 Check the PCB output voltage 8 7 Defrost Heater Error r dH ...

Page 45: ...stance 105 117Ω No Yes Change Fuse M 4 Check the Heater Voltage Is voltage 112 116V Yes 3 Check the Defrost control part Is Defrost Sensor resistance 22kΩ or OFF OFF 22kΩ Change Defrost Sensor Input Test 3 Mode Push the button 3 times 1 Check the input Voltage 2 Replace Main PCB No 5 Check the Heater Voltage Is voltage 0V Yes Input Test 1 Mode Push the button 1 times Replace Main PCB No TEST MODE ...

Page 46: ...es CON7 CN1 CON201 CON2 CON1 CON3 CON5 CON6 CON203 CON10 Symptom Check Point 1 E rF 1 Check the air flow 2 Check the PCB Fan motor voltage Duct CON6 TEST MODE 1 Voltage V CON6 3th pin 5th pin 11 4 12 6V CON6 1th pin 5th pin Not 0V 5V CON6 34th pin 5th pin Not 0V 5V 8 8 Refrigerator Fan Error E rF ...

Page 47: ...e fan using hand It feel sticky Yes Change the Fan motor Replace Main PCB No Reset the unit and Input Test1 Mode Push the button 1 time TEST MODE 1 Voltage V CON6 3rd pin 5th pin 11 4 12 6V 5 Check the Fan Motor voltage Is Fan feed back voltage 0V 05V Yes Change the motor No TEST MODE 1 Voltage V CON5 1st pin 5th pin Not 0V 5V 6 Check the Fan Motor voltage Is Fan PWM voltage 0V 05V Yes Replace Mai...

Page 48: ...CON201 CON2 CON1 CON3 CON5 CON6 CON203 CON10 Symptom Check Point 1 E FF 1 Check the air flow 2 Check the Fan Motor 3 Check the PCB Fan motor voltage Fan Motor CON7 TEST MODE 1 Voltage V CON7 10th pin 12th pin 11 4 12 6V CON7 8th pin 12th pin Not 0V 5V CON5 4th pin 5th pin Not 0V 5V 8 9 Freezer Fan Error E FF ...

Page 49: ...4 12 6V Yes 3 Check the Fan motor Rotate fan using hand It feel sticky Yes Change the Fan motor Replace Main PCB No Reset the unit and Input Test1 Mode Push the button 1 time Go to 3 Fan Motor TEST MODE 1 Voltage V CON7 10hpin 12th pin 11 4 12 6V 5 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the motor Yes TEST MODE 1 Voltage V CON7 4th pin 5th pin Not 0V 5V 6 Check the Fan...

Page 50: ...201 CON2 CON1 CON3 CON5 CON6 CON203 CON10 Symptom Check Point 1 E IF 1 Check the air flow 2 Check the Connector 3 Check the PCB Fan motor voltage Air Flow Connector CON7 TEST MODE 1 Voltage V CON7 3th pin 5th pin 11 4 12 6V CON7 1th pin 5th pin Not 0V 5V CON7 24th pin 5th pin Not 0V 5V 8 10 Icing Fan Error E IF ...

Page 51: ... 12 6V Yes 3 Check the Fan motor Rotate fan using hand It feel sticky Yes Change the Fan motor Replace Main PCB No Reset the unit and Input Test1 Mode Push the button 1 time Fan Motor TEST MODE 1 Voltage V CON7 3rd pin 5th pin 11 4 12 6V 5 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the motor Yes Go to 3 Go to 4 TEST MODE 1 Voltage V CON7 24th pin 5th pin Not 0V 5V 6 Check...

Page 52: ...CON201 CON2 CON1 CON3 CON5 CON6 CON203 CON10 Symptom Check Point 1 E CF 1 Check the air flow 2 Check the Connector 3 Check the PCB Fan motor voltage Fan Motor CON7 TEST MODE 1 Voltage V CON7 4th pin 6th pin 11 4 12 6V CON7 2th pin 6th pin Not 0V 5V CON5 1th pin 4th pin Not 0V 5V 8 11 Condenser Fan Error E CF ...

Page 53: ...t Test1 Mode Push the button 1 time Go to 4 Fan Motor Fan Motor TEST MODE 1 Voltage V CON5 1pin 4th pin Not 0V 5V Check the Fan Motor voltage Is Fan Motor voltage 11 4 12 6 V Yes Replace Main PCB No TEST MODE 1 Voltage V CON7 4hpin 6th pin 11 4 12 6V Check the Fan Motor voltage Is Fan PWM voltage 0V 5V No Change the motor Yes 7 Explain to customer TEST MODE 1 Voltage V CON7 2th pin 6th pin Not 0V ...

Page 54: ... CON1 CON3 CON5 CON6 CON203 CON10 Symptom Check Point 1 E CO 1 Check the loose connection 2 Check the Hinge connection Voltage V CON101 7th pin 6th pin 12V CON101 5th pin 6th pin Not 0V 5V CON101 4th pin 6th pin Not 0V 5V CON5 4th pin 6th pin Not 0V 5V CON5 4th pin 8th pin Not 0V 5V CON101 8 12 Communication Error E CO ...

Page 55: ...nge the Display PCB 3 Check the voltage Is CON101 2nd pin 3rd pin voltage 0V or 5V Yes No Voltage V CON101 5th pin 6th pin Not 0V 5V Change the Main PCB 4 Check the voltage Is CON101 2nd pin 4th pin voltage 0V or 5V Yes No Voltage V CON101 4th pin 6th pin Not 0V 5V Change the Display PCB 5 Check the voltage Is CON5 4th pin 6th pin voltage 0V or 5V Yes No Voltage V CON5 4th pin 6th pin Not 0V 5V Ch...

Page 56: ...ics Inc All rights reserved Only training and service purposes Symptom Check Point 1 Cube mode doesn t work 1 Check the loose connection 2 Check the resistance CON2 CON1 Ice Maker Geared Motor Dispenser Motor 8 13 Cube mode doesn t work ...

Page 57: ...All rights reserved Only training and service purposes LEVER S W Voltage V CON2 4thpin B NEUTRAL Pushing 112 115V Not Pushing 0 2V CON1 12th pin 13th pin Pushing 9 12V Not Pushing 0 2V Resistance Ω Geared Motor 31 1 42 1 Dispenser Motor 9 9 12 1 ...

Page 58: ... Not Pushing 0 2V 3 Check the voltage while pushing the lever S W Is voltage correct compared with table No Yes LEVER S W Voltage V CON1 12th pin 13th pin Pushing 9 12V Not Pushing 0 2V Change the PCB CON1 4 Check the resistance value Is Geared Motor resistance 31 1 42 1Ω No Yes Replace Geared Motor Resistance Ω Geared Motor 31 1 42 1 5 Check the resistance value Is Dispenser Motor resistance 9 9 ...

Page 59: ...cs Inc All rights reserved Only training and service purposes Symptom Check Point 1 Crush mode doesn t work 1 Check the loose connection 2 Check the resistance Ice Maker Geared Motor Dispenser Motor CON2 CON1 8 14 Crush mode doesn t work ...

Page 60: ...ll rights reserved Only training and service purposes LEVER S W Voltage V CON2 12th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V CON1 12th pin 13th pin Pushing 9 12V Not Pushing 0 2V Resistance Ω Geared Motor 31 1 42 1 Dispenser Motor 9 9 12 1 ...

Page 61: ...V Not Pushing 0 2V 3 Check the voltage while pushing the lever S W Is voltage correct compared with table No Yes LEVER S W Voltage V CON1 12th pin 13th pin Pushing 9 12V Not Pushing 0 2V Change the PCB 4 Check the resistance value Is Geared Motor resistance 31 1 42 1Ω No Yes Replace Geared Motor Geared Motor Resistance Ω Geared Motor 31 1 42 1 5 Check the resistance value Is Dispenser Motor resist...

Page 62: ... mode doesn t work 1 Check the loose connection 2 Check the resistance valve Water Valve PilotValve Resistance Ω Pilot Valve 360 420 Water valve 360 420 CON2 CON2 LEVER S W Voltage V CON2 11th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V CON2 10th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V 8 15 Water mode doesn t work ...

Page 63: ...e connection Change the PCB 3 Check the resistance value Is Pilot Valve resistance 360 420Ω No Yes Replace P Valve PilotValve Resistance Ω Pilot Valve 360 420 4 Check the resistance value Is Water Valve resistance 360 420Ω No Yes Replace Water Valve Water Valve Resistance Ω Water valve 360 420 CON2 LEVER S W Voltage V CON2 11th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V CON2 10th pin B NEUTRA...

Page 64: ...sensor resistance 2 Check the air flow 3 Check the air Temperature 4 Check the R Fan motor voltage Duct Status Air Flow Windy Air Temperature Cold Duct CON7 CON6 TEST MODE 1 Voltage V CON6 3th pin 5th pin 11 4 12 6V CON6 1th pin 5th pin Not 0V 5V CON6 34th pin 5th pin Not 0V 5V CON7 15th pin 16th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 8 16 Poor coolin...

Page 65: ...eck the air flow Windy No Yes Check the R Fan Motor Check the damper Go to 5 4 Check the air temperature Is it cold No Yes Check the Compressor and sealed system TEST MODE 1 Voltage V CON6 1st pin 5th pin Not 0V 5V 5 Check the Fan Motor voltage Is Fan Motor voltage 11 4 12 6V Yes Replace Main PCB No TEST MODE 1 Voltage V CON6 3rd pin 5th pin 11 4 12 6V 6 Check the Fan Motor voltage Is Fan Feed Bac...

Page 66: ...heck Point 1 Refrigerator room lamp doesn t work 1 Check the Refrigerator door switch 2 Check the door S W resistance 3 Check the LED Lamp Resistance Ω Door S W Normal 0 Push S W Infinity Voltage V CON6 28th pin 30th pin 11 4 12 6V LED Lamp LED Lamp Voltage V Blue Black Closed 0 2V Open 11 4 12 6V LED Lamp Door S W CON6 8 17 Refrigerator room lamp doesn t work ...

Page 67: ...hange the LED Lamp Voltage V CON6 13h pin 15th pin 11 4 12 6V 2 Check the door S W resistance Is it correct compared with table No Yes Change the Door S W 3 Check the PCB Voltage Is CON7 13h pin 15th pin voltage 11 4 12 6V No Yes Change the PCB CON6 5 Check the LED Lamp voltage Is it 0 2V While door closed No Yes Change the Door S W 6 Check the LED Lamp voltage Is it 11 4 12 6V While door open No ...

Page 68: ...Symptom Check Point 1 Freezer room lamp doesn t work 1 Check the freezer door switch 2 Check the door S W resistance 3 Check the LED Lamp Resistance Ω Door S W Normal 0 Push S W Infinity Voltage V CON6 13th pin 15th pin 11 4 12 6V LED Lamp LED Lamp Voltage V White Yellow Closed 0 2V Open 11 4 12 6V LED Lamp Door S W CON6 8 18 Freezer lamp doesn t work ...

Page 69: ...en the door open lamp On When the door Close lamp Off Resistance Ω Door S W No magent near the switch Infinity Magnet is near the switch 0 Check the PCB Voltage Is CON6 28th pin 30th pin voltage 11 4 12 6V While door open No Yes CON6 Change the PCB 3 5 No Yes Top LED Lamp Change the LED Lamp Check the LED Lamp voltage Is voltage 11 4 12 6V While door open Check LED Lamp Connection 6 4 Check the PC...

Page 70: ...r flow 3 Check the air Temperature 4 Check the Fan motor sticky 4 Check the Fan motor voltage Duct Duct Status Air Flow Windy Air Temperature Cold Fan Motor CON7 CON5 CON7 17th pin 18th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 5ºF 15ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k TEST MODE 1 Voltage V CON7 10th pin 12th pin 11 4 12 6V CON7 8th pin 12th pin Not 0V 5V CON5 4th pin 5th...

Page 71: ...0k 32ºF 0ºC 8k Poor cooling in Freezer compartment 1 Check the sensor resistance 2 Reset the unit and Input Test1 Mode Push the button 1 time 3 Open the Freezer door and Check the air flow Windy No Yes Check the F Fan Motor Go to 5 4 Check the air temperature Is it cold No Yes Check the Compressor and sealed system 5 Check the Fan motor Rotate fan using hand It feel sticky Yes Change the Fan motor...

Page 72: ...Fan Motor voltage Is Fan Motor voltage 11 4 12 6V Yes Replace Main PCB No TEST MODE 1 Voltage V CON7 10thpin 12th pin 11 4 12 6V 7 Check the Fan Motor voltage Is Fan Feed Back voltage 1 5V No Change the motor Yes TEST MODE 1 Voltage V CON5 4th pin 5th pin Not 0V 5V 8 Check the Fan Motor voltage Is Fan PWM voltage 1 5V No Replace Main PCB Yes 9 Explain to customer ...

Page 73: ... Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes Symptom Check Point 1 E Od 1 Check the loose connection 2 Check the voltage J1 J3 8 20 Wi Fi Modem Error E Od ...

Page 75: ... Home Bar door S W resistance 2 Check the PCBA 3 Check the Knock on sensor 4 Check the Knock on Door LED Lamp LED Lamp Knock on sensor Home Bar Door S W Resistance Ω Door S W Normal 0 Push S W Infinity Voltage V CON10 2th pin 3th pin 11 4 12 6V CON10 4th pin 6th pin 4 75 5 25V Knock on sensor Voltage V Yellow Black Knock off 4 75 5 25V Knock on 0 2V LED Lamp Voltage V White Yellow Knock off 0 2V K...

Page 76: ...ar the switch Infinity Magnet is near the switch 0 Check the PCB Voltage is CON10 2th pin 3th pin voltage 11 4 12 6V While Knock on is CON10 4th pin 6th pin 4 75 5 25V No Yes CON10 Change the PCB 3 5 No Yes LED Lamp Explain to customer Check the LED Lamp voltage Is it 11 4 12 6V While Knock on And Magnet is near the switch Change the LED Lamp 6 4 Check the Knock on signal voltage Is it 0 2V While ...

Page 77: ...ving TPA 1 How to make TEST MODE If you push the test button on the Main PCB the refrigerator will be enter the TEST MODE 2 How to remove Terminal Position Assurance TPA 1 time Comp Damper All FAN on All things displayed 2 times Damper closed 22 22 displayed 3 times Forced defrost mode 33 33 displayed Main PCB AC TPA DC TPA Refrigerator Freezer Refrigerator Freezer Refrigerator Freezer ...

Page 78: ... F 21 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 29 62 22 33 16 99 13 05 10 10 7 88 6 19 4 91 3 91 3 14 2 54 2 07 1 69 1 39 VOLTAGE 4 09 V 3 84 V 3 55 V 3 23 V 2 89 V 2 56 V 2 23 V 1 92 V 1 63 V 1 38 V 1 16 V 0 97 V 0 81 V 0 67 V 0 56 V 0 47 V 0 39 V ...

Page 79: ...0 F 21 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 30 76 96 60 13 47 34 37 55 30 24 13 19 53 15 91 13 03 10 74 8 89 7 40 6 20 VOLTAGE 4 48 V 4 33 V 4 16 V 3 95 V 3 734 V 3 487 V 3 22 V 2 95 V 2 67 V 2 40 V 2 14 V 1 89 V 1 64 V 1 45 V 1 27 V 1 10 V 0 96 V ...

Page 80: ...ery high temperatures How to Measure Fuse M Set a ohmmeter to the 2 housing pin Measure the 2 pin connected to Fuse M If the ohmmeter indicate below 0 1ohm fuse m is a good condition But if infinite the part is bad How to Measure Sensor Set a ohmmeter to The 2housing pin Measure the 2 pin connected to Sensor If the ohmmeter indicate 11 at room temperature Sensor is good When check the ohm at other...

Page 81: ...can decide part is defective or not when we check the resistance How to Measure Set a ohmmeter connect to The housing pins Measure the pins connected to Sheath Heater If the ohmmeter indicates VxV P R V voltage P watt R Resistance is on a good condition ex watt 200W voltage 115V R 115x115 200 66 Ω Infinitive value implies sheath heater is disconnected Standard Sheath heater at all temperature Test...

Page 82: ...can decide part is defective or not when we check the resistance How to Measure Set a ohmmeter connect to The housing pins Measure the pins connected to Sheath Heater If the ohmmeter indicates VxV P R V voltage P watt R Resistance is on a good condition ex watt 200W voltage 115V R 115x115 200 66 Ω Infinitive value implies sheath heater is disconnected Standard Sheath heater at all temperature Test...

Page 83: ... can decide part is defective or not when we check the resistance How to Measure Set a ohmmeter connect to The housing pins Measure the pins connected to Sheath Heater If the ohmmeter indicates VxV P R V voltage P Watt R Resistance is on a good condition ex watt 130W voltage 120V R 120x120 130 111 Ω Infinitive value implies sheath heater is disconnected Standard L cord Heater at all temperature Te...

Page 84: ...S ඖ Check Voltage between pin 13 and 14 3 ඖ Check the Reed S W resistance No Magnet Magnet Near the Switch 0DJQHW PXVW EH FHQWHU RI 6ZLWFK Resistance Service Action h Magnet Center Switch Center O Good position Bad position X Magnet Center Switch Center Q FDVH RI 6WDWXV 5HVXOW 69 FWLRQ RRU ORVH 9Ȥ KHFN 5HHG 6 KHFN DUQHVV disconnection I 1R RN FKDQJH 3 Q FDVH RI RRU 2SHQ 9 1 Check Reed S W 2 Check ...

Page 85: ...and service purposes 0Q JGEMKPI NQY 4GUWNV 58 EVKQP JCPIG 4GGF 5 9 4GOQXG UETGY LVDVVHPEOH RXVLQJ KHFN 5HVLVWDQFH RI 5HHG 6 LI LW LV 1 FKDQJH LW 1XPEHU VVHPEOH 5HHG 6 WR KLQJH FRYHU DQG VVHPEOH 5HHG 6 RXVLQJ VVHPEOH 6FUHZ WR KLQJH FRYHU Push Hook Push Hook Push first Push second ...

Page 86: ...mp Through the gap ඖ Check Voltage between pin 21 and 22 3 ඖ Check the Reed S W resistance No Magnet Magnet Near the Switch Resistance Service Action Magnet must be center of Switch Magnet Center Switch Center O Good position Bad position X Magnet Center Switch Center Q FDVH RI 6WDWXV 5HVXOW 69 FWLRQ RRU ORVH 9Ȥ KHFN 5HHG 6 KHFN DUQHVV disconnection I 1R RN FKDQJH 3 Q FDVH RI RRU 2SHQ 9 1 Check Re...

Page 87: ...EMKPI NQY 4GUWNV 58 EVKQP JCPIG 4GGF 5 9 4GOQXG UETGY CPF FKXKFG JQWUKPI KXKFG 4GGF 5 9 3XVK WKH SDUW RI KRRN DQG GLYLGH 5HHG 6 KHFN WKH 5HHG 6 UHVLVWDQFH DQG LI LW LV 1 KDQJH LW 1XPEHU 2WUJ VJG 4GGF 5 9 VQ FKTGEVKQP QH VJG CTTQY VVHPEOH 6FUHZ DIWHU VVHPEOH 5HHG 6ZLWFK KRXVLQJ Push First push Second push ...

Page 88: ...DPS WKURXJK WKH JDS ඖ Check Voltage between pin 13 and 14 3 ඖ Check the Reed S W resistance No Magnet Magnet Near the Switch 0DJQHW PXVW EH FHQWHU RI 6ZLWFK Resistance Service Action h Magnet Center Switch Center O Good position Bad position X Magnet Center Switch Center Q FDVH RI RRU ORVH 9Ȥ KHFN 5HHG 6 KHFN DUQHVV disconnection I 1R RN FKDQJH 3 Q FDVH RI RRU 2SHQ 9 1 Check Reed S W 2 Check Harne...

Page 89: ...e purposes No Checking Flow Result SVC Action 4 Change Reed S W Remove screw 8EA Disassemble R L Door Remove screw 1EA Disassemble Cap Deco Push Hook and Disassemble Housing Check the Reed S W resistance and if it is NG Change it Number 3 Assemble in reverse order how to disassemble Push ...

Page 90: ...served Only training and service purposes 90 10 6 Dispenser DC Motor Function Dispenser DC Motor When customer push the dispenser button Pull duct door How to Measure Standard Dispensor DC Motor Dispenser DC Motor Test Points 1 to 2 Result 9 9 12 1Ω 1 2 ...

Page 91: ...tor Test Points 1 to 2 Result 31 1 42 09Ω Cube Solenoid Test Points 1 to 3 Result 31 1 42 09Ω Separate the housing Measure the resistance between 1 and 2 Check the resistance between connectors In door motor 1 2 and In door motor 1 3 It means check whether or not applying an Electric current If there is resistance it means the geared motor or solenoid is not inferiority 1 2 3 1 1 2 Separate the ho...

Page 92: ...s colder when the damper plate is open When the damper is closed the chill rooms temperature will rise How to Measure Damper Circuit Check the Standard Damper Test Points Red and Yellow Result 270 330Ω Test Points Blue and White Result 270 330Ω Check to see if there is electrical current if there is resistance the damper is good 1 Blue 1 Blue 4 Yellow 3 White 3 White 1 3 Check the 2 4 Check the 1 ...

Page 93: ...y training and service purposes 93 10 9 Flow Sensor Function Flow Sensor in machine room Count the water quantity from city water to water filter in refrigerator How to Measure Standard Flow Sensor in machine room Test Points Red wire to Black wire Result 4 30 kΩ ...

Page 94: ...blink 5 LED blink2 LED blink6 Reset Reset Reset Reset LED blink 1 LED blink 7 Replace Driver PCB LED blink 8 Reset LED blink 8 Replace Driver PCB Replace Driver PCB LED blink 5 LED blink2 Heavy Repair Heavy Repair Comp Work Comp Check Replace Comp Comp Work Comp Check Harness Check Leakage Recheck Reset LED blink6 Heavy Repair Heavy Repair Recheck Replace Driver PCB Comp Work Comp Check Refrigeran...

Page 95: ...ng and service purposes 95 11 1 Check A There is PC Board located in the PCB case The control driver is PC board for the compressor This step shows the source voltage of the driver PC board Driver PCB located in machine room Step1 Open PCB Cover Step2 Check Driver PCB COR ...

Page 96: ... as shown below Check to make sure compressor is receiving voltage from IPM In order to determine whether the compressor is operating normally check the output voltage during the refrigeration cycle After initial power up when the compressor begins to operate wait 10 minutes before checking The compressor is operating normally if the voltage is greater than 80V IPM Output check ...

Page 97: ...ck B Blink 2 times Stroke Trip Check B2 Compressor Doesn t work Y N Compressor Works Intermittently Capacitor Spec Check C Compressor Damage Check C Replace Capacitor Replace Compressor N N Reset Power Stroke Trip Occur Y Repeat Check Procedure Harness Connecting Check C Fix Harness N N Cycle Check E Fix Cycle Replace Driver PCB OK NG Purpose Prevent abnormally long piston strokes Case 1 If compre...

Page 98: ...onnect Trip Check B3 Compressor Doesn t work Y N No Connect Trip occur Compressor Damage Check C Reset Power Repeat Check Procedure N Harness Connecting Check C Fix Harness N Replace Compressor N Replace Driver PCB Y Purpose Prevent over voltage and current detecting connecting error Cause Connecting error of PCB and Comp Capacitor harness Comp insulation damage Logic Compressor is forced off and ...

Page 99: ...compressor Logic Compressor is forced off and tries to restart within 2 5 minutes B5 LED blinks six times then repeats Current Trip A E Inverters Blink Blink Blink Blink Blink Blink OFF Protection logic Check B Blink 6 time Current Trip Check B5 Compressor Intermittently works N IPM Check Compressor Damage check Replace Compressor N Replace Driver PCB Reset Power Current trip Occur N N Repeat Chec...

Page 100: ...ck B Blink 7 times Lock Piston Trip Check B5 Compressor Doesn t work Y N Repeat Check Procedure Replace Drive PCB N Y Check IPM visual inspection turn off Short Test Point A Power Reset Compressor Damage Check C3 Replace Compressor NG Y Modify 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 tr...

Page 101: ... logic Check Blink 8 times Communication Error Check B7 Check Comp Starting When C Fan doesn t work Y N Repeat Check Procedure Replace Driver PCB Reset Power Purpose To detect Set control Micom and communication error Cause Communication Error Logic LED blink Compressor runs reference value before occuring communication Error Blink 2 Check whether or not C Fan Works 1 Check Temp Sound Pressure of ...

Page 102: ...int B 6 8ohm Resistance at Point D 6 8ohm Replace Compressor Problem B D Check wiring to compressor Y N N Y Y Y N N Check Compressor terminals Harness Problem Y N Y 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 Dead short check P C Multi Tester Resistance FLB075LBLA Co Po N C Cap...

Page 103: ...her than ambient pressure therefore oil will flow out with the refrigerant at leak point Temp of compressor and discharge line is normal to slightly higher High side pressure is normal to slightly higher than normal conditions This is because condenser cannot condense the air that is trapped in the condenser The high side pressure and temperature will not mimic the low side pressures and temperatu...

Page 104: ...ce purposes 104 Compressor Troubleshooting WARNING HIGH VOLTAGE Step 1 Open PCB cover Step 2 Check for blinking frequency of LED and PCB 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 LED Lamp ...

Page 105: ... first action 3 If the same symptom arises after the second action replace compressor Circuit over current error Or cycle error 1 After resetting power check if it is running normal 2 If the same symptom arises after the first action 3 If the same symptom arises after the second action replace compressor PCB parts defect IPM 1 After resetting power check if it is running normal 2 If the same sympt...

Page 106: ... 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 Is there a gap in the door gasket Wipe moisture with a dry cloth It will disappear in low temperature and humidi...

Page 107: ...d Equal to ambient temperature Normal discharging of the Refrigerant MOISTURE CLOG Cooling operation stops periodically Flowing sound of refrigerant is not heard and frost melts Lower than ambient temperature Cooling operation restarts when heating the inlet of the capillary tube CLOGGED BY DUST COMP RESSION Freezer and Refrigerator don t cool Low flowing sound of refrigerant is heard and frost fo...

Page 108: ...system area Frost Pattern Partial Equalization Test Very Slow None Equalization Test Very Fast Fast Very Fast Inefficient Compressor Partial Restriction Complete Restriction Condenser Temperature Cap Tube Sound Yes No Air Low Side Leak Loss of Change Very Slow Faint Hotter than Normal None to Weak Room Temperature Compressor Not Pumping Trace of Oil Undercharge The equalization test is trying to r...

Page 109: ...e bin is full Runs MOTOR to drop ice from the tray into the ICE BIN Performs Ice Making Mode afer supplying water by operating the SOLENOID in ICE VALVE With the detect lever checks if the ICE BIN is full While ICE OFF indicator is on icemaker stops making ice But you can disense the ices until the ices run out from the ice stoare Test Button Walls until water becomes cold after starting the icema...

Page 110: ...sition If It is off please press and hold it to select the on position Check the water lines at the back of the unit for any kinks or leaks that could be inhibiting water flow to the icemaker If the water lines at the back of the unit art kinked straighten them out If there are any leaks refer to the water line installation section of the Use and Care Guide At least 12 hours are needed to make the...

Page 113: ... With Special Beep Sound 2 Perform the same way again to cancel the display mode 3 All Freezing unit will be turned off at display mode Exceptions Lamp Display 13 1 10 CONTROL OF FREEZER FAN MOTOR 1 Freezer fan motor has high and standar speed 2 When refrigerator is overloaded fan motor runs in high speed as powered up Standard speeds is used for general purposes 3 To improve cooling speed the RPM...

Page 114: ...tically start upon the selected Auto Pantry temperature control 2 You can adjust the Pantry control with three different temperature ranges by pressing the Temp Selector button 13 1 17 Defect 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 ...

Page 115: ...to use subsidiary material It does not provide the service with a single Part 315A 106A 106A 313A 411A 500A S11 S11 406D B01 610D 402A S04 207A 402A B02 249C 262B S14 302B 400A 408A 302C 401A 408B 310B 306A 300A 314A 317A 318A 303C 304A 301A 308B 308C 403B 312C 262H 404A S14 410G 303A 624C 624G 626A 603C 500P 105A 619D 409F 405J 405K S10 145B 271D 315C 315B 315C 315B 103B 103A 610F 145A 120A 409H ...

Page 116: ... rights reserved Only training and service purposes FREEZER PARTS CAUTION Use the part number to order part not the position number 132P 136A 131A 136B 136C 249M 133C 133C 132Q 249L 136E 134A S04 S04 145G 145J 145K 145C 145F 145M 145J 145H 237C ...

Page 117: ...and service purposes REFRIGERATOR PARTS CAUTION Use the part number to order part not the position number 142D 142A 142B 143A 141F 141B 141H 141A 141F 141B 141H 141A 141F 141B 141H 141A 151A 151C 151B 162B 255B 255A 161A 146E 162A 145D 177C 133E 161C 133E 255A 132P 154D 161B ...

Page 118: ...201A 249K 250A 253A 249J 250B S05 249F 250B 249E S05 250F 250K 407G 262E 624A 405M 409I 212G 231A B06 B06 244F 212J 406E 122C 231C 233C 279M 241D 241F 232B 233A 271E 991F 104A 409G When 409G is serviced It has to provide 104A together When 213A is serviced It has to provide 212G 212J together 241M 241J 402B 406G S14 243A 243P S14 S08 S02 S03 276D 406H 406J S14 406I 262F 241A 241B 232A 281K 207D 24...

Page 119: ...All rights reserved Only training and service purposes DISPENSER PARTS CAUTION Use the part number to order part not the position number 279B 276A 276B 405A 281A 501A 279C 279A 276F 276G 276I 278C 501D 279L 278D 279K 275A 402E 402C 501J 410S ...

Page 120: ...ctronics Inc All rights reserved Only training and service purposes VALVE WATER TUBE PARTS CAUTION Use the part number to order part not the position number 617A 625A 616G 623B 616J 616G 623B 616J 603C S04 627B S04 627A S04 619A ...

Page 121: ... All rights reserved Only training and service purposes ICE MAKER ICE BIN PARTS CAUTION Use the part number to order part not the position number 630F 630B 630A 630H 630G 630C 630Q 630E 630D 611A 630J 630J 607A 600J 600I 600H 600G 600C 600A ...

Page 122: ...P No MFL68488649 APR 2017 Printed in Korea ...

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