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REFRIGERATOR SERVICE MANUAL

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1. Auto closing hinge The refrigerator doors and freezer drawers close automatically when you push them slightly The door only closes automatically when it is open at an angle of less 2 7 than 30 Glide N Serve When you want to store food items at a much lower temperature you can use the temperature controller to maintain the lowest possible chilling Fixed door bin The fixed door bin is used to preserve chilled food or drinks that are of a suitable size for storing in this bin Pull out Drawer It is a convenient feature Dura Base Divider temperature without that allows you to fill large This is a convenient feature that freezing containers such as the extra allows you to fill large containers bin and It is useful to store such as an ice chest cooler or pitcher with ice F Basket This is a convenient feature that allows you to fill small frozen food beverage to needed quick cooling Ice Bin A Ice Compartment Door M pag 3 DISASSEMBLY 3 1 REMOVING AND REPLACING REFRIGERATOR DOORS e Removing Refrigerator Door CAUTION Before you begin unplug the refrigerator Remove food and bins from doors Left Door FIG 2 1 Disconnect water supply tube by pushing back on the disconnect ring 3 FIG 1 2 Open door Loosen top hinge cover screw 1 Use flat tip
2. nnn ann n nana 36 44 FRETS IN C 35 50 11 COMPONENT TESTING INFORMATION 51 59 0 soc 60 72 13 ICEMAKER OPEARTING AND TROUBLE SHOOTING METHOD enne nennen nennen nnn nnns 73 76 14 DESCRIPTION OF FUNCTION amp CIRCUIT OF 1 1111 1111 1111111 nnn 77 80 SAFETY PRECAUTIONS Please read the following instructions before servicing your refrigerator 1 Unplug the power before handling any elctrical componets Check the rated current voltage and capacity Take caution not to get water near any electrical components Use exact replacement parts Remove any objects from the top prior to tilting the product Ow gt nn 1 SPECIFICATIONS 1 1 LFX31925 e 31 cu ft DIMENSIONS inches NET WEIGHT pounds COOLING SYSTEM DEFROSTING SYSTEM Full Automatic Heater Defrost DOOR FINISH ITEMS VEGETABLE TRAY COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DEFROSTING DEVICE PCM VCM St
3. 14 1 9 Cooling Fan Motor 1 The cooling fan is switched ON and OFF in conjunction with the compressor 2 The cooling fan Motor has high and standard speeds When room temper rapture more high then 38 C speed is high 3 The Failure sensing method is the same as in the fan motor of the freezing fan motor refer to failure diagnosis function table for failure display 14 1 10 Ice Compartment Fan 1 The Icing Fan is controlled by the the sensor on the top of the ice compartment 2 The Failure sensing method is the same as in the fan motor of the freezer refer to failure diagnosis function table for failure display 14 1 11 Refrigeration room Fan Motor 1 The refrigeration room fan is switched ON and OFF in conjunction with the refrigeration room temperature 2 he Failure sensing method is the same as in the fan motor of the freezing fan motor refer to failure diagnosis function table for failure display 14 1 12 Ice PLUS he purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice Whenever selection switch is pressed selection release the Icon will turn ON or OFF If there is a power outage and the refrigerator is powered on again Ice PLUS will be canceled To activate this function press the Ice PLUS key and the Icon will turn ON This function will remain activated for 24 hrs The first one hour the compressor Freezer Fan and Icing Fan will be ON The next 23 hou
4. 15 3 19 WATER VALVE DISASSEMBLY METHOD 3 20 FAN AND FAN MOTOR DISASSEMBLY 1 Turn off the water to unit Remove the waterline from the METHOD valve 1 Remove screws for the Drain Pipe Assembly and the 1 connected to the Motor Cover MOTOR COVER 2 Remove cover and 1 screw from the valve 2 Separate the Fan Assembly and Motor turn counter clockwise to remove from the motor shaft FAN ASSEMBLY MOTOR Assemble reverse order Taking care to avoid 1 Do not to bend the tube during assembly 2 Press the Water Dispenser button letting water pour out this checks for any leaks in the tube connection this may vary depending on the water pressure about 2 minutes 3 Separate the housing and remove the valve Housing 4 Remove the clip and press the collet to separate the tube from the connector Note there maybe some water in the line Collet Tube Insert Line Clip 16 3 21 PULL OUT DRAWER Top Drawer 1 Use a flat blade screwdriver to push the tab in on the left rail and push the tab on the right rail in with your finger Once the tabs have been pushed in 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
5. 3 18 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3 18 1 Follow Steps to Remove Step 1 Open the freezer door Step 2 Remove the lower basket Step 3 Remove the two screws from the guide rails one Step 4 Removal of the freezer door is done by ifting clear from each side of the rail support Fully extend both rails Step 5 Remove only 1 screw of gearice and disassemble Step 6 Remove 2 screws of both side of supporter covers the bar and gearice tv and disassemble the supporter cover tv 14 3 18 2 Follow Steps to Reinstall otep 1 Insert both side of supporter cover tv into Step 2 D Assemble a bar and gear ice with screw connector rails and then screw them 2 Push the otherside of the gear to inside of the bar 2 p J N gt gt Step 3 Put gear ice assembled with the bar by screw into Step 4 Insert opposite gear ice into connector rail and connector rail s hole screw them Step 5 The rail system will align itself by pushing the rails Step 6 Reinstall the freezer door by inserting the rail tabs all the way into the freezer section into the guide rail Pull the rails back out to full extension Assemble them like as pictures i 4 TUL mami Ad j Step 7 Reinstall the two screws into the guide rails one from each side Step 8 Reinstall the lower basket and close the freezer door
6. Is frost patern Uniform Yes Sealed System is OK 67 Yes Compressor Troubleshooting A 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 68 LED operating condition Service guideline LED two time repetiton Stroke Trip on on off on off on off LED six time repetiton Current Trip repeating on on on on on off on on on on on on LED seven time repetiton IPM Fault Trip off on on on on on off 69 PCB Parts defect or Compress or Connector miss connecting Piston over run repeating LED five time repetiton Piston Lock Trip FG Fisk on on on Off on on on on off Circuit over current error repeating Or cycle error repeating Please check Whether connector of compressor is attached rightly or not after power off After the first action You check on normal operation of compressor If the same symptom arises after the second action replace PCB After resetting power check if it is running normal If the same symptom arises after the first action If the sam
7. 3 Pull out the cover grille to disassemble by using tools shown in the figure 4 Put your hand into the inside of grille to disassemble shown in the figure 5 Disconnect wire harness of the grille assembly 6 Remove the Ice fan assembly by loosening all screws 5 3 5 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 46F 8 C 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 1 2 Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap Figure 2 DEFROST CONTROL ASSEMBLY GRILLE ASSEMBLY 3 6 Refrigerator Light Top 3 6 2 Refrigerator Light Side Unplug Refrigerator or disconnect power at the circuit 1 Unplug refrigerator power cord from electric outlet breaker 2 Put flat screwdriver into sevice hole and remove cover of If necessary remove top shelf or shelves refrigerator light 3 6 1 Refrigerator Compartment Lamp 1 Release 2 screws 2 Hold both ends with your both hands and pull it downward to remove it 3 Remove the LED assembly from connector 3 To remove the case lamp and cover lamp release another
8. LG REFRIGERATOR CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL COLOR STAINLESS ST SMOOTH BLACK SB MODEL LFX31925 SUPER WHITE SW CONTENTS SAFETY PRECAUTIONS 2 SPECIFICATIONS 3 2 PARTS IDENTIFICA TION 4 aslD5cIgILmAc S 5 REMOVING AND REPLACING REFRIGERATOR DOORS esses nennen o peo 6 DOOR 7 FAN MOTOM 7 DEFROST CONTROL ASSEMBLY 7 REFRIGERATOR bet SINN a 8 9 9 DS PERN SEP TT TT TTE m 10 p 10 ICE BUTTON ASSEMBLY 10 WATER BUTTON ASSMEBEY 10 ICE CORNER DOOR REPLACEMENT etta eraat sux rra D rmx eee urtica wa i eng ivi und dn 10 MR CM SRM
9. T SIDE R LED 9 1 L5 2 T Bow eni Mete LLLI BL R ROOM LED X MODULE 0 PWB PCB ASSEMBLY ICE MAKER ICE MAKER KIT BK BLACK NOIR BL BLUE BLEU BN BROWN MARRON BO BRIGHT ORANGE ORANGE BRILLANT GY GRAY GRIS YL BL YELLOW BLUE JAUNE BLEU YL YELLOW JAUNE GN GREEN VERT PR PURPLE PURPLE WH WHITE BLANC GY RD GRAY RED GRIS ROUGE SB SKY BLUE BLEU BLANC PK PINK ROSE GN YL GREEN YELLOW VERT JAUNE BL WH BLUE WHITE BLEU BLANC 20 6 TROUBLESHOOTING 6 1 Error Code Summary WARNING When checking Resistance values make sure to turn off the power and wait for the voltage to discharge NOTE Within 3 hours after the error Press the Ice Plus button and Freezer button simultaneously hours after the error All errors except for Er rt Er SS Er IS except for Icing sensor Er gF Er It error are displayed Normal operation of Display Er IS which is displayed without input of user is the error of Icing Sensor Short or Disconnection of Freezer Sensor Error Display Freezer Refrigerator Temperature Temperature Error code C Error code Error Detection Category Normal Freezer Sensor Error Generation Factors Error Refrigerator Short or Disconnection Sensor Error of Refrigerator Sensor Defrosting Short or Disconnection Sensor Error of Defrosting Sensor Short or disconnection of the sensor about Ice
10. Temperature Fuse Disconnection Heater disconnection DRAIN Jam Poor Relay for Heater Poor BLDC Motor connection DRIVE IC and TR Poor BLDC Motor connection DRIVE IC and TR Poor BLDC Motor connection DRIVE IC and TR Poor BLDC Motor connection DRIVE IC and TR Poor Communication connection Poor TR of Transmitter and Receiver between display and main board 7 PCB PICTURE 7 1 Main PCB P No amp MFG CON5 CONG CON7 EBR730936 2011 01 LL 157 CONS CON2 un m an t r cr T CON1 22 7 2 Display PCB amp Sub PCB MN Display PCB EBR 729554 2011 03 dl E uH Sub PCB EBR60070709 2011 01 23 8 Troubleshooting With Error Display 8 1 Freezer Sensor Error Er FS Lr Checking flow Result amp SVC Action Check the Blue White to Blue White Result SVCAction Change the sensor OFF Open Replace the refrigerator pion Cie lt Temperature table 1 gt DTo Rest The sensor is determined by the temperature For example 23kQ indicates 4 F 24 8 2 Refrigerator Sensor Error Er rS Checking flow Result amp SVC Action Check the White to White Resut SVC Action Change the sensor Replace the refrigerator Check the Temp and Other Normal resistance Table 2 lt Temperature table 2 gt DTo Q Result 50 F 10 C
11. 59 F 15 C The sensor is determined by the temperature For example 30kQ indicates 32 F 25 8 3 Icing Sensor Error Er IS Checking flow Result amp SVC Action Check for a loose connection Check the Blue to Blue SVC Action Short Change the sensor Open Replace the refrigerator Check the Temp and M resistance Table 1 Temperature table 1 gt Resut lt 5 gt 22 30 40 kQ 13 F 25 C 30 kQ 4 F 20 C 23 kQ 14 F 10 C 13 kQ 23 F 5 C 10 kQ The sensor is determined by the temperature For example 23kQ indicates 4 F 26 8 4 Defrost Sensor Error F dS CONT Check the Brown to Brown 27 Checking flow Result amp SVC Action Check for a loose connection SVC Action 0 9 Short Change the sensor OFF Open Replace the refrigerator Check the Temp and resistance Table 3 Temperature table 3 gt ToQ 23 F 5 C 38 30 iQ 32 F 0 50 F 10 C The sensor is determined by the temperature For example 23kQ indicates 4 F 8 5 Defrost Sensor Error R dS Lr Checking flow Result amp SVC Action Check for a loose connection Check the Orange to Orange Resut Action Change the sensor Replace the refrigerator Check the Temp and resistance Table 3 lt Temperature table 3 gt Check the Gray to Gray 1 To
12. NG Replace ld Ed Compressor Y 64 B5 LED blinks seven times then repeats IPM Fault A amp E Inverters Protection Logic 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 logic Check B Blink 7 times Lock Piston Trip Check B5 CheckIPM d Shots Replace visual inspection j Tet gt turn off N Point Az Pd i Y ee EI Damage Check NG Replace Compressor Compressor Doesn t work 65 12 3 Check C C1 Harness Connection Check Check Process C2 Capacitor Specifications C3 Compressor Check Step 1 Power off Step 2 Check capacitor spec table1 Step3 Check resistance of point A Step 4 Check wire harness INF ohm Step 5 Check resistance at point B Step 6 Point D Check wiring to ompresso Y Harness Connecting OK at Point A 6 8oh Capacitor Spec esistance at Point B 6 8ohm Y Harness heck Compresso Problem at Point D 6 8oh Problem Problem A B B D Replace Compressor Caution Turn off power during check C Measure the resistance at each point except point C Dead short check measure the
13. SVC Action Reset the unit and Input Test 1 Mode Push the button 1 time Open the freezer door and Check the air Status sve Action While an error code is displayed the fan is not working Windy 60104 y Go to 4 Check the Fan motor voltage 3 2 1 Point Result SVCAction 1 1 3 Change the motor 31 8 9 Freezer Fan Error Er FF Checking flow Result amp SVC Action Reset the unit and Input Test 1 Mode Push the button 1 time Open the freezer door and Check the air flow SVC Action While an error code is displayed the fan is not working Check the Fan motor Rotate fan using your hand It feel sticky change the motor cause of ice or rust inside of motor Check the Fan motor voltage Point Result SVC Action 1 2 Below12V Change the PCB 1 3 Change the motor 3 2 1 CONT7 32 8 10 Icing Fan Error Er IF Reset the unit and Input Test 1 Mode Push the button 1 time Open the freezer door and Check the air 7 flow Status SVC Action While an error code is displayed Go to the 3 4 the fan is not working NH Go to the 5 Check the Connector Frozen caused the PCB short Check the Fan motor voltage NE 3 2 1 2 Below9 V Change the PCB 11 3 Change the motor CONT 8 11 Condenser Fan Error Er C
14. Status Result SVC Action oa Normal Change door S W Push Infinity Gotothe3 to the 3 SW Other door S W s EAE SVC Action Go to the 4 Normal 4 lt CON7 gt Check the Red to Black Status Result SVC Action Go to the 5 Normal Change the LED Lamp Check the Black to White SVC Action Explain to customer to customer Closed Change the Door S W 12V Explain to customer Explain to customer customer Other Change the LED Lamp 39 9 5 Refrigerator room lamp doesn t work Checking flow Result amp SVC Action Check the Refrigerator door switch If feel sticky Change the door s w SVC Action Go to the 3 Change door Switch Push Go to the 3 Change door Switch Status Result _ SVC Action 3 Go to the 4 et Normal Normal Change the PCB Status SVC Action Go to the 5 Normal Change the LED Lamp SVC Action Explain to customer Change the Door S W Explain to customer Change the LED Lamp Closed 40 9 6 Poor cooling in Fresh food section Checking flow Result amp SVC Action Check the sensor resistance Temperature CONT 50 F 10 C The sensor is determined by 59 F 15 C the temperature For example 30kQ indicates 32 F Reset the unit and Input Test 1 Mode Push the button 1 time Open the fresh
15. Use the part number to order part not the position number CAUTION Use the part number to order part not the position number FREEZER PARTS 82 REFRIGERATOR PARTS CAUTION Use the part number to order part not the position number 83 DOOR PARTS CAUTION Use the part number to order part not the position number 84 DISPENSER PARTS CAUTION Use the part number to order part not the position number 53 I 85 VALVE amp WATER TUBE PARTS CAUTION Use the part number to order part not the position number 86 ICE MAKER amp ICE BIN PARTS CAUTION Use the part number to order part not the position number 87 LG Electronics Inc P No MFL62188047 MAR 2011 Printed in Korea
16. Warm position Seal liquid foods with wrap Put in foods after they have cooled down Don t open the door too often and close it firmly Wipe moisture with a dry cloth It will disappear in low temperature and humidity Fill up the gap 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 Clean the door gasket Position in a firm place and level the Leveling Screw Make sure food stored in shelves does not prevent the door from closing 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 Check Components of the defrosting circuit Perform sealed system repair Replace the Thermistor 12 6 REFRIGERATION CYCLE v Troubleshooting Chart PARTIAL LEAKAGE COMPLETE LEAKAGE PARTIAL CLOG G G m UJ lt U C MOISTURE CLOG COMP RESSION NO COMP RESSION NOISS3HdlNOO JAILO333Gd 12 6 1 Cleaning STATE OF THE UNIT Freezer compartment and Refrigerator don t cool normally Freezer compartment and Refrigerator don t cool normally Freezer compartment and Refrigerator don t cool normally Freezer compartment and Refrigerator don t cool Cooling operation stops periodically Freezer and Refrigerator don
17. five times then repeats Locked Piston A amp E Inverters Protection Logic Blink Blink Blink Blink Blink OFF Purpose To detect locked piston Cause Lack of oil to the cylinder cylinder or piston damaged and or restricted discharge A Locked Piston can also be caused by foreign materials inside the compressor Logic Compressor is forced off and tries to restart within 2 5 minutes Replace 9 Lock Piston Trip Check B3 Compressor Check B N Hi side restriction Compressor Doesn t work Compressor Doesn t work Reset Power Sealed N Repeat p B4 LED blinks six times then repeats Current Trip A amp E Inverters Protection Logic Blink Blink Blink Blink Blink Blink OFF Purpose Prevent over current overload protect Cause Ambient temperature is high over 43 and or refrigerator s condenser air movement is restricted Condenser Fan is stopped restricted discharge line compressor is damaged or IPM device is defective Logic Compressor is forced off and tries to restart after 6 minutes Compressor Intermittently works Protection Blink 6 time p B Current Trip Check B4 lt gt Repeat Current trip Check Procedure Occur Replace Capacitor S Replace ae IPM ji t Driver PCB 7 CheckB5 2 7 7 E CompressoP _ _
18. food door and Check the air flow Status SVC Action Check the Fan motor No windy Check the damper Go to the 6 Check the air temperature Status _ Cold or not SVC Action Explain to customer N Id Check the Compressor And sealed system 41 Lr Checking flow Result amp SVC Action Check the R Fan motor voltage 3 2 1 Point Result SVC Action 1 2 Below12V Change the PCB 1 3 Change the motor 3 CON6 42 9 7 Poor cooling in Freezer compratment Checking flow Result amp SVC Action Check the sensor resistance 1 To 2 Result 22 F 30 C 40 kQ 13 F 25 C 30 kQ 4 F 20 C 23 kQ SON 14 F 10 C 13 kQ The sensor is determined by the temperature 23 F 5 C 10 For example 23kQ indicates 4 32 F Q C Reset the unit and Input Test 1 Mode Push the button 1 time ie the freezer door and Check the air Status SVC Action No windy Check the F Fan motor a Status Cold or not AO eii enn Explain to customer N Id Check the Compressor DEO And sealed system 43 Lr Checking flow Result amp SVC Action Check the Fan motor Rotate fan using your hand Resut SVCAction It feel sticky change the motor cause of ice or rust inside of motor 7 Check the F Fan motor voltage 2 Resut SVC Action Below 12V Change the PCB 1 2 1 3 C
19. get into the compartment and make ices get stuck Replace the cap duct with new one 76 14 DESCRIPTION OF FUNCTION amp CIRCUIT OF MICOM 14 1 FUNCTION 14 1 1 Function 1 When the appliance is plugged in it is set to 37 F for Refrigerator and O F for freezer You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button When the power is initially applied or restored after a power failure it is set to Control temperature Previously If you do not press any button after turning on the power only CRUSH or CUBE Label that has been selected will be turned on and all other LEDs on the display Panel will be turned off within 60 seconds Power Save Mode If you press a button only CRUSH CUBE label and Lock icon that has been selected will be turned on and all other LEDs on the display Panel will be turned off within 20 seconds Power Save Mode Linear Compressor Linear Compressor mi Linear Compressor Te 14 1 2 How to Toggle the Display between F amp C 1 The initial setting is F and the display temperature mode can be changed from F to C or C to F by pressing and holding the FRZ TEMP and the REF TEMP keys at the same time for over 5 seconds 14 1 3 Lock function dispenser and display button lock 1 2 When the refrigerator is first turned on the buttons are not locked LOCK is deactivated with no light on T
20. maker Icing sensor Ice maker sensor Short or Disconnection of Pantry Sensor Short or Disconnectoin of Room temp sensor Check each sensor at it s connector Icing Sensor Error Pantry sensor error Room Temp Sensor Error O gt Ice maker kit defect Flow Meter Sensor Defect Poor Defrosting Abnormality of BLDC FAN Motor for Ice Making Abnormality of BLDC FAN Motor for Freezer Abnormality of BLDC FAN MOTOR For Refrigerator Abnormality of BLDC FAN Motor for Mechanic Hoom Communication Error Other Electric system error such as moter gear Hall IC operation circuit within kit Error of flow meter or water input or low water pressure Even though it is passed 1 hour since then Defrosting if Defrosting sensor is not over 46 F 8 C it is caused It is caused when feedback signal isn t over 65 seconds during BLDC FAN motor operating It is caused when feedback signal isn t over 65 seconds during BLDC FAN motor operating It is caused when feedback signal isn t over 65 seconds during BLDC FAN motor operating It is caused when feedback signal isn t over 65 seconds during BLDC FAN motor operating Communication Error between Micom of Main PCB and Display Micom 21 When the does not drop even when the Test S W is pressed Error of flow meter or water input or low water pressure or flow meter connection
21. 2 Result 23 F 5 C 38 KQ 32 F 0 C 30 41 F 5 C 24 kQ 50 F 10 C 19 5 kQ 59 F 15 C 16 kQ The sensor is determined by lt CON7 gt the temperature For example 23kQ indicates 4 F 28 8 6 Defrost Heater Error F dH Checking flow Result amp SVC Action Check the Door gasket Par Result SVC Action Check the Defrost control part Go to the 3 Fuse M Change Fuse M Def 34 42 Q Go to the 3 Def eater Change Fuse M neater Def 22197 Go to the 3 Sensor Replace product Input Test 3 Mode Push the button 3 times Check the Blue to Orange SVC Action 112 116 V Go to the 5 Replace Main PCB lt CON3 gt Release the test mode push the button 1 times normal Check the Blue to Orange Explain to customer 112 116 V Main PCB 29 8 7 Defrost Heater Error dH Lr Checking flow Result amp SVC Action I Check the Door gasket Pat Result Action Fuse M Change Fuse M Def Go to the 3 Def Change Fuse M Heater Def Go to the 3 Replace product Input Test 3 Mode Push the button 3 times Check the Blue to Yellow SVC Action 112 116 V Go to the 5 Heplace Main PCB CON3 Release the test mode push the button 1 times normal Check the Blue to Yellow Explain to customer 112 116 V Replace PCB 30 8 8 Refrigerator Fan Error Er rF Checking flow Result amp
22. 2 screws as following picture 4 Use a flat blade screwdriver as shown below to remove the cover lamp 4 Replace LED assembly 5 Assemble the cover in reverse order 5 To remove the LED Assembly open the Hook part to pull it out as shown in the following picture Case lamp Cover lamp LED Assembly 3 6 3 Cap Duct LED LAMP Bottom 3 7 MULTI DUCT 1 Unplug refrigerator power cord from electric outlet 1 Remove 2 screws and guide rail 2 Open the refrigerator door to need diassembly 3 Put flat screwdriver into service hole remove the cover 2 Remove the upper lower Caps by using a flat screwdriver and remove 2 screws as shown figure 4 Remove the LED assembly from connector 3 Disconnect the lead wire on the bottom position 4 Grip both side of multi duct pull it out 5 Replace LED assembly 6 Assembly the cover in reverse order 3 8 DISPENSER 1 Pull out the drain 2 Holding the inner side of the dispenser pull forward to remove 3 If nozzle is interfered with button push and pull out the bottom of button 4 Remove the lead wire CAUTION When replacing the dispenser cover make sure the lead wire does NOT come off and the water line is not pinched by the dispenser 3 9 DISPLAY PCB As shown below remove 1 screw on the PCB fixing screw Remove the display PCB fixing screw Case PCB Display PCB 3 10 ICE BUTTON
23. 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 3 11 WATER BUTTON ASSMEBLY 1 Remove screws 2 Grasp the Button assembly and lift Button Lever 3 12 ICE CORNER DOOR REPLACEMENT 1 Loosen the front screw as shown in the picture 2 Lift up the hinge with one hand 3 Pull out the Ice Corner Door with the other hand 10 3 13 ICEMAKER REPLACEMENT CAUTION Make sure that the motor housing is taped to the mold if not positioned correctly the cover will not fit properly 1 Remove 4 screws as shown 2 Grasp the bottom of motor cover assembly and pull slowly 3 14 SUB PCB FOR WORKING DISPENSER 1 Disconnect the wire harness 2 Remove 1 screw from PCB and replace with new PCB 3 Disconnect wire harness from wall of compartment In door motor 11 3 15 CAP DUCT MOTOR REPLACEMENT 1 Separate the Housing of the Cap Duct Motor 3 When replacing the motor check the position of the door duct and the link for proper fit Duct Door Link Cap Duct Motor NG Position 4 Insert 2 screws 12 3 16 HOW TO REMOVE A ICE BIN 3 17 HOW TO INSERT A ICE BIN 1 Grip the handles as shown 1 Insert the Ice Bin slightly tilting to avoid touching the Icemaker Especially Ice Detecting Sensor
24. F Checking flow Result amp SVC Action Reset the unit and Input Test 1 Mode Push the button 1 time Check the fan rotating Status SVC Acti ction While an error code is displayed Check motor the fan is not working G he4 Check the Fan motor and surrounding Rotate fan using your hand It feel sticky change the motor Check the Fan motor voltage Point Result Action 1 2 Below 10V Change the PCB 1 3 Change the motor 3 2 1 CONT7 24 8 12 Communication Error Er CO Checking flow Result amp SVC Action Result SVC Action Check the Hinge loose connection Change the Main PCB Result SVC Action Change the Display PCB 23 26 86 E 1 4 Result SVC Action edi zu Change the Main PCB Result SVC Action Change the Display PCB CON5 Check the White Red to White Black Result SVC Action Change the Main PCB Explain to customer lt CON5 gt 35 9 Troubleshooting Without Error Display 9 1 Cube mode doesn t work Lr Checking flow Result amp SVC Action Check the Black to White Lever s w Result SVC Action While pushing the lever S W Lever s w 112 115 V Go to the 3 Pushin lt CON2 gt Check the RED to White Red While pushing the lever S W SVC Action 12V Go to the 4 Pushing Change Not Go to the 4 iin Change lt C
25. IN DIFFERENT LOCALITIES AND MODEL TYPE AUGER MOTOR ICING 5 BL T 3 FAN MOTOR IL Emu 13 H POWER ELA MOTOR CORD BR I NE NEUTRAL ens DU EN L MAS Q GN YL LIVE FUSE 7 HB RD SENSOR HH SENSOR FIL DOOR SIW EARTH LI PART E r F SENSOR ki LI FD SENSOR ome gt EL 1312 11 10 9 8 7 6 5 43 21 HRD BLK ron BL BO BK SB RD A E ome E 70 DOOR SW 2 CAPDUCT BL N UJ MOTOR BLN m Ll BLN CD OD L RT SENSOR R DEF HTR FUSE M BL N un wa ITI ICE SENSOR lt WATER PIPE BL N ps PILLAR HTR BUZZER RDOOR LINEAR COMP lt SW HSENSOR J cow gt PWB ASSEMBLY DISPLAY 0011102 CON103 iii 259 BO PRI is CON201 STET M 0000 c E gt m lt KT SIDER LED Pe Us lel st 9 HIF BOX m u PWB PWB ICE BETA DUCT HTR 5 ASSEMBLY MOTOR 12 AUN RANTRY E PHOTO TR 9 55 2 MH mar lt 23 WHH E 52 i 38 B n
26. ON3 gt CON1 Poit Result SVC Action 31 1 42 1 Q Explain Replace Geared Motor 9 9 99 12109 12 1 99 12109 Explain 3 to 4 Replace Geared Motor Dispenser Motor gt 36 9 2 Crush mode doesn t work Checking flow Result amp SVC Action Check the Sky Blue to White Result SVC Action While pushing the lever S W 112 115V Go to the 3 o to the Pushin CON2 Check the Black to White Red While pushing the lever S W SVC Action Go to the 4 AN Pushing 9 Not Go to the 4 A 22 4 pushing lt CON3 gt CON1 Pot Result SVC Action 31 1 42 1 0 Explain Replace Geared Motor 9 9 99 1219 12 1 99 1219 Explain 3 to 4 Replace Geared Motor Dispenser Motor gt 2537 9 3 Water mode doesn t work Lr Checking flow Result amp SVC Action Check the Purple to White Lever s w Result SVC Action While pushing the lever S W Lever s w 112 115 Go to the 3 Pushing Check the resistance value SVC Action 1 2 360 4202 Explain Replace 360 360 4202 Explain 3 to NEL Replace ome Water Valve Dispenser lt Pilot Valve gt lt Water Valve gt Machine Room In door 38 9 4 Freezer room lamp doesn t work Checking flow Result amp SVC Action Check the Freezer door switch If feel sticky Change the door s w Check the door S W resistance
27. UE 11 SUB PCB FOR WORKING DISPENSER 11 25 4 2 7 p xt RE 11 DUCT MOTOR REPLACEMENT 12 HOW TO REMOVE A ICE BIN 13 HOW TOINSERT AICE BIN EE 13 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER eene 14 15 WATER VALVE DISASSEMBLY METHOD e a EAA EENES E aea EaR 16 FAN AND FAN MOTOR DISASSEMBLY 3 16 17 CAUTION SEALED SYSTEM REPAIR 2 Aa ERN EDER 18 ADJUSTMENT m 19 COMPRES SOM MH 19 5 CIRCUIT DIAGRAM ec 20 0 TAROUBLESHOOHNG E 21 POB PC cc E 22 23 8 Troubleshooting Wilh Error DISDIA 24 35 9 Troubleshooting Without Error Display eccesso eere ree nee nenne
28. ainless REFRIGERATOR LAMP ABS Resin Polyurethane Foam LED Module HANDLE TYPE INNER CASE INSULATION e DIMENSIONS AN iis DeptrwoHandes 3 8 smn Deptt Total witrDoor Open B 4898m BegutoTopotCas E Heightto Top of Door Hinge Wem open 80 wo tanay 3 I 2 PARTS IDENTIFICATION LED interior lamps The interior lamps light up the inside of the refrigerator Water filter Dairy product bin The water filter purifies The dairy product bin is water used to preserve dairy products NOTE The filter should be replaced A every 6 months Please refer 5 to Replacing the filter Pu NA 227 in this manual for details L This function may not be zd available depending on 1 cL the model Indoor bin nd 100 ice cubes are S automatically produced over Modular door bin C O per 24 hour period 7 Interchangeable bins can a NI be arranged to suit your storage needs The crisper controls humidity and helps vegetables and fruit to stay crisp Adjustable refrigerator shelf The refrigerator compartment shelves are adjustable to allow flexibility for storage needs Preserve large size food or containers
29. compressor 1 After resetting power check if it is running normal 2 If the same symptom arises after the first action replace PCB 10 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 process is repeated 3 times If the fan motor is determined to be defective the error code will be shown in the display for 30 minutes At this point the process will be repeated until the fan motor operates normally If normal operation is achieved the error display is erased and the MICOM is reset automatically No signal Error Display 155 155 1 Normal drive No signal 205 15s Pause 30min Pause 30min 50 11 COMPONENT TESTING INFORMATION 11 1 Defrost Controller Assembly Function The controller assembly is made up of two different kinds of parts The fuse and the sensor To determine if these parts are defective check for resistance The fuse will cut power to the defrost heater at very high temperatures How to Measure Fuse M How to Measure Sensor Standard Fuse M at all temperature Test Point 1 to 2 0 0 152 51 Set a ohmmeter to the 2 housing pin Measure the 2 pin connected to Fuse M If the ohmmeter indicate bel
30. e symptom arises after the second action replace compressor After resetting power check if it is running normal If the same symptom arises after the first action If the same symptom arises after the second action replace compressor After resetting power check if it is running normal If the same symptom arises after the first action replace PCB 12 5 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY Plug into the outlet Set the switch to ON Replace the fuse If the voltage is low correct the wiring No Cooling Cools poorly Food in the Refrigerator is frozen Condensation or ice forms inside the unit Condensation Is the power cord unplugged from the outlet Check if the power switch is set to OFF Check if the fuse of the power switch is shorted Measure the voltage of the power outlet Check if the unit is placed too close to the wall Check if the unit is placed too close to the stove gas cooker or in direct sunlight Is the ambient temperature too high or the room door closed 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 Check if the Control is set to Warm position Is food placed in the cooling air outlet Check if the control is set to colder position Is the ambient temperature below 41 F 5 C Is liquid food sealed Check if food put in the refrige
31. ent Does icemaker compartment door close tightly Time Yes How long has customer At least 120min must be passed to make ices after water comes into icemaker waited for icemaker to At least 24 hours must be passed to have ice bin full of ices not in case of make ices installation If the issue haven t resolved yet though you have checked all the items above go to next step 74 13 3 2 Icemaker not making ice or not making enough ice Icemaker Unit amp Ice detecting sensor Diagnosis icemaker Unit and Ice detecting sensor Diagnosis The icemaker unit and Ice detecting sensor is programmed to be diagnosed Follow the procedure step by step to check to see if icemaker and lce detecting sensor is working normally Icemaker Unit Ice detecting sensor 1 STEP Icemaker Unit Diagnosis Press the fill key for about 3sec If the icemaker runs 2 stages of harvest and filling water step by step It means icemaker s mechanism is normal x Caution Be sure that the ice tray is not filled with water before pressing fill key 75 2 STEP Ice detecting sensor Diagnosis 1 Remove Ice bin from compartment 2 Close the left door Door switch pushed 5 Push the refrigerator button amp lock button at the same time If is shown on the display after the procedure above Ice detecting sensor is normal If FULL is shown on the display after t
32. erature of compartment not temperature on display Icemaker needs below O F to drop ices to ice bin 13 2 3 Fill Park Position Once the normal harvest mode has been completed the water solenoid will be activated 13 3 Trouble Shooting Ice amp Water system Issues 13 3 1 Icemaker not making ice or not making enough ice Environmental Diagnosis Icemaker can t make ices itself Basically water temperature and time are needed Water If no Water then no Ice Temperature The compartment where the icemaker is located has to be at least 1 F so that icemaker dumps ices to the bin Time At least 80 minutes must be passed to make one series of ices after water comes into icemaker x Test Mode should not be carried out before checking below Not making ice Water Is saddle valve turned on Check saddle valve Is the icemaker fill tube frozen Check the fill tube heater s electrical resistance Are water valve housings are connected properly Check all the water valve connection Water line kinked or damaged Is water filter too old Is Icemaker s tray filled with water or Ice Temperature Does cold air come out from air vent normally Check if Icing fan is working Is measured Check if multi duct is blocked temperature below 10 F No in the icemaker Are the amp F room cold enough Measure the temp and Check gas leakage at the back compartm
33. erter Protection Logic Blink OFF Blink OFF Purpose Detecting motor current and voltage error Check voltage at point A Motor Voltage point B Motor Current and Point C Capacitor Voltage when compressor is off Spec Points A B amp C 2 5V 0 3V Protection Blink 1 time logic Check B FCT 0 Check B1 Out of spec 2 2 2 8V Replace Driver PCB N B2 LED blinks two times then repeats Stroke Trip A amp E Inverters Protection Logic Blink Blink OFF Blink Blink OFF Purpose Prevent abnormally long piston strokes Case 1 If compressor doesn t work and LED blinks Cause Possibly harness from compressor to PCB might be defective Case 2 If 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 En Blink 2 times Stroke Trip Check B2 N 7 Y Harness Y lt _ Connecting gt CheckC 2 7 Compressor Doesn t work Compressor Works Intermittently Replace Driver PCB OK Fix Repeat N Check Procedure N Replace Capacitor A Compressot 7 Damage Compressor Stroke Trip Occur B3 LED blinks
34. ft mullion up carefully e Mullion Replacement 1 Connect wire harness 3 Disconnect wire harness 2 Insert mullion into channel Insert the mullion into channel at door as shown below e Door Gasket Removal 1 Remove gasket Remove the gasket from gasket channel at doorliner as 3 Assemble 2 screws shown in the illustration below Gasket Channel Gasket 3 3 Door Alignment If the level of refrigerator doors is uneven follow the instructions below to align the doors Turn the leveling legs CCW to raise or CW to lower the height of the front of the refrigerator by using flat blade screw driver or 11 32 wrench Use the wrench Included with the User Manual to adjust the bolt in the door hinge to adjust the height CW to raise or CCW to lower the height 3 4 FAN AND FAN MOTOR 1 Remove the freezer drawer 2 Remove the plastic guide for slides on left side by unscrewing phillips head screws 3 Remove the grille assembly by removing four screws and pulling the grille assembly forward 4 Remove the Fan Motor assembly by loosening 3 screws and disassembling the shroud 5 Pull out the fan and separate the Fan Motor and Bracket Motor FAN MOTOR Ice Fan Assembly Ice Fan Assembly Replacement 1 Remove the plastic guide for slides on left side by unscrewing phillips head screws 2 Pull out the cover sensor to disassemble by using tools shown in the figure
35. function for quick freezing 2 When you press the ice plus button the ice plus icon will be turned on again 3 Ice plus function automatically turns off after a fixed time passes 4 If you want additional power save you can turn on energy saving some heater off for anti dew 5 To turn on or off the energy saving function press Ice plus Energy saving Button for more than 3 seconds 6 We recommend using energy saving function when you go out for quite a long time and are out of the rainy season 14 1 7 Dispenser use selection WATER PAD You can select water or ice by separated pad switch ICE PAD When you press ice type button ice type will be changed Crush or Cube e Hold your cup in the dispenser for a few seconds after dispensing ice or water to allow the last pieces of ice drops of water to fall into the cup When after initially establ ishing the water comes out the water tank inside fills and until at the time of quality the hour is caught 78 14 1 8 CONTROL OF FREEZER FAN MOTOR Freezer fan motor has high and standard speeds 2 High speed is used at power up for Ultra Ice and when refrigerator is overloaded Standard speeds is used for general purposes 3 To improve cooling speed the RPM of the freezer fan motor change from normal speed to high 4 High speed 2700RPM Initial power on or load corresponding operation Ultra Ice Normal speed 2400RPM General working conditions
36. hange the motor 3 2 1 lt 7 gt 44 10 Reference 10 1 TEST MODE and Removing 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 perd ral 09 gt vel 4 5 YM gt 21 wa XI CS uu Hn A 54444 x Lo v Main PCB 1 time Comp Damper All FAN on All things displayed 2 times Damper closed 22 22 displayed x 9 times Forced defrost mode 33 33 displayed 2 How to remove Terminal Position Assurance TPA AC TPA DC gt After measure the values you should put in the TPA again 45 10 2 TEMPERATRUE CHART FREEZER AND ICING SENSOR 46 10 3 TEMPERATRUE CHART REFRIGERATOR AND DEFROST SENSOR 95 F 35 7 40 kQ 1 10 V 104 F 40 C 6 20 kQ 0 96 V 47 Compressor Troubleshooting Step 1 Open PCB cover Step 2 Check for blinking frequency of LED PCB If 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 48 Actions to take according to Led blinking frequency LED operating condition Service guideline LED two time repetiton PCB part defect EE piston on on off on on off on on off
37. he procedure above Ice detecting sensor is abnormal x empty 13 3 3 Icemaker not making ice or not making enough ice Other Suspected Items Strongly suspect items below If the issue remains yet though all the diagnosis for icemaker has been carried out Cap duct bad sealing Defective thermal sensor in the icemaker compartment Not cold icemaker compartment area sealed system 13 3 4 Not Dispensing Ice Clogged Ice In the Ice Bin suspected items Customer haven t used ice dispenser over a week Resolution the ices gets stuck if customer doesn t use ice dispenser In this case empty the ice bin and wait until the new ices are stacked in the ice bin Temperature of icemaker compartment is not cold enough Resolution Check ice fan sealed system cap duct vent and other items related to temperature Cap duct doesn t seal the air properly Resolution Possibly warm air could get into the compartment and make ices get stuck Replace the cap duct with new one In door geared motor doesn t work Resolution Change the in door geared motor and test it The water comes out of fill cup and the water get into the ice bin Resolution The water pressure from shutoff valve is too high Hecommend to use regulator to the customer and close the shutoff valve slightly Clogged Ices In the Chute suspected items Cap duct doesn t seal the air properly Resolution Possibly warm air could
38. il water becomes ice Mode x For cold air circulation Ice tray will be on a slightly tilt one hour after Full Ice Check ice making mode begins Atilt ice tray means icemaker s normal operation Ice Tray slightly tilt P f water becomes ices in the ice tray Ice detecting sensor check if the ice bin is full Harvest Mode Twist the ice tray to drop ice into the ICE BIN Supply water to the ice tray by operating the solenoid valve D To force water to supply to the ice tray or check icemaker s condition press and hold the FILL Key for about 3seconds In the test mode The icemaker will run through 3 stages step by step Harvest Fill water Ice making To reset the icemaker s operation set the power switch OFF position and back it to ON position Power Switch Ice Tray Ice detecting sensor Icemaker Unit 73 13 2 ICE MAKER FUNCTIONS 13 2 1 Icemaking Mode 1 Icemaking Mode begins right after the ice tray fills with water 2 Icemaker waits until water becomes ice in the ice tray x Ice detecting sensor checks if the ice bin is full every 2min 13 2 2 Harvest Mode At least in 110min since icemaker begun icemaking mode Icemaker starts to twist the ice tray to drop ices into the bin After installation at least 1day is needed to make ices x If the icemaker never drop ices to the ice bin though water becomes ices in the ice tray check the real temp
39. ime the COMPRESSOR running time Betwee 7 50 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 1 hours the defrost mode is malfunctioning Refer to the defect diagnosis function 8 1 15 4 Defrosting won t function if its sensor is defective wires are cut or short circuited 14 1 15 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 Linear Compressor o Display check function If simultaneously pressing Ultra Ice button and freezing temperature adjustment button for a second display LCD graphics on If releasing the button the LCD graphic displays the previous status You can check the error code Within 3 hour Period from initial error 14 1 16 Auto pantry 1 The temperature control will automatically 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 80 15 EXPLODED VIEW amp REPLACEMENT PARTS LIST CASE PARTS CAUTION
40. istance it means the geared motor or solenoid is not inferiority Standard Geared Motor Cube Solenoid 1 to 2 31 1 42 09 Q 1 to 3 31 1 42 090 56 11 7 Damper Function The damper supplies cold air from the freezer to the chill room using the damper plate The chill room is colder when the damper plate is open When the damper is closed the chill rooms temperature will rise How to Measure Table l 1 Tabiel2 2 24 Rotation Housins No amp Rec j meco B D gr emm j even Blue White Check the 1 3 lt extension gt d Check the DA Check the 1 3 Check to see if there is electrical current if there is resistance the damper is good Standard 11 8 Lamp Socket Function The lamp socket connect cover lamp assembly to lamp The lamp socket fix lamp and unite lamp and cover lamp assembly The lamp socket supply electric source to lamp also How to Measure Check the resistance between connector of housing and connector of lamp socket It means check whether or not applying an electric current If there is resistance it means the lamp socket is good 96 and 30 6 58 11 9 Flow Sensor Function Flow Sensor in machine room Count the water quantity from city water to water filter in refrigerator How to Measure Flow Sensor in machine ro
41. o lock the display the dispenser and the control panel press and hold the LOCK button for 3 seconds LOCK is activated with Lock Icon on The LOCK button is the only control feature that remains active Ex In selecting Ex In selecting in the locked state The buzzer sound other control buttons LOCK LOCK again and the dispenser are deactivated To release from the locked state press and hold the LOCK button again for 3 seconds If you don t hold the Alarm Lock button more than 3 seconds Alarm function will be changed and alarm for opened door will be on off same as alarm icon indicating 77 14 1 4 Filter condition display function 1 There is a replacement indicator light for the filter Classification In initial Power On Blinking cartridge on the dispenser Filter RESET 2 Water filter needs replacement once six months or of using water filter Filter Status 3 When Water Filter Icon blinks you must exchange Display FILTER the filter 4 After replacing the filter press and hold the Light Filter button for more than 3 seconds After then water Filter icon turn off with reset status 14 1 5 Air Filter selection Please select this function for Air Filter e When you press the Air Filter Button the POWER will be turned on again Air Filter POWER function automatically turns off after a fixed time passes 14 1 6 Ice Plus selection Please select ice plus
42. om Standard 59 12 Compressor Troubleshooting PCB Check Simplify Protection Logic TEST 1 Mode A inverter Time 30sec amp V 200 Y h PCB reso Check Voltage about 200V past 30second after turn on Troubleshooting LED blink 7 Not Y Cooling N Reset LED blink 1 Replace Driver PCB Replace Driver PCB N N N Reset LED blink 5 Replace Comp Y Y N Heavy Repair Leakage Reset LED blink 7 m N N Reset LED blink6 Check C Y Y N Heavy Repair Leakage Recheck N Replace Driver PCB Y etri N Heavy Repair jus a 60 12 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 61 IPM Output check Measure the voltage between the POWER and COMM pins of the connector as shown below Check to make sure compressor is receiving voltage from IPM In order to determine whether the compressor is operating normally de check the output voltage during the refrigeration cycle Multi Tester After initial power up when the compressor begins operate wait 10 minutes before checking The compressor is operating normally if the voltage is greater than 80V 62 12 2 Check B B1 LED blinks once then repeats FCTO Fault A Inv
43. out to full extension Lift the front of the drawer up then pull it straight out 3 22 CAUTION Sealed System Repair Before making a sealed system repair Start with the power cord unplugged from the outlet Plug in the power cord and between 6 and 12 seconds after it has been pugged in unplug it from the power source this will allow both sides of the 3 way valve to be opened to allow for proper evacuation 3 Way Valve Service 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 18 4 ADJUSTMENT 4 1 COMPRESSOR 4 2 3 Compressor protection logic 4 1 1 Role e Since linear Comp conducts linear reciprocating motion we have protection logic for compressor motor and PCB 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 as the below Stroke Trip During the operation if stroke is above the target value decrease the target volt by 3V 4 1 2 Note for Usage Current Trip Current trip is set in order to protect compressor mechanical part and drive from the overcurrent that might arise du
44. ow 0 10hm fuse m is a good condition But if infinite the part is bad Set a ohmmeter to The 2housing pin Measure the 2 pin connected to Sensor If the ohmmeter indicate 11 0 at room temperature Sensor is good When check the ohm at other temperatures Check the sensor manual Sensor at room temperature Test Point 1 0 2 11 2 Sheath Heater Freezer Room Function Sheath heater is the part for defrost All heating wire is connected to only one line So we 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 V o V Watt HR is on a good condition ex watt 350W voltage 115V 115 0115 350 38 2 Infinitive value implies sheath heater is disconnected Standard Sheath heater at all temperature Test Point 1 to 2 41 8 46 2 52 11 2 Sheath Heater Refrigerator Room Function Sheath heater is the part for defrost All heating wire is connected to only one line So we 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 V o V Watt H is on a good condition ex watt 350W voltage 115V 115 0115 350 38 2 Infinitive value implies sheath heater is disconnected Standard Sheath heater at all temperatu
45. rator is hot Did you open the door of the unit too often or check if the door is sealed properly Check if the ambient temperature and humidity of forms in the Exterior Case the surrounding air are high Is there a gap in the door gasket There is abnormal noise Is 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 Door does not close well Check if the door gasket is dirty with an item like juice Is the refrigerator level Is there too much food in the refrigerator 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 Not defrosting The system is faulty The operation of the Thermistor is incorrect 70 e Other possible problems Check if frost forms in the freezer Check the refrigeration system Check the Thermistor Place the unit about 4 inches 10 cm from the wall Place the unit away from these heat sources Lower the ambient temperature Put in foods after they have cooled down Don t open the door too often and close it firmly Set the control to Recommended position Place foods in the high temperature section front part Set the control to Recommended position Set the control to
46. re Test Point 1 to 2 78 6 86 8 53 11 4 Door Switch Function The switch senses if the door is open or closed When the door open lamp on When the door open the switch give information to Micom When the door open internal contact operate on and off moving plunger of door switch up and down How to Switch Freezer Switch Refrigerator Measure Button Plunger Beep Beep Check the resistance between connectors 1 2 and 3 4 It means check whether or not applying an electric current If there is resistance the switch is good Standard Multimeter Switch F R Push the button Plunger Beep or 09 None oo Q2 54 11 5 Dispenser DC Motor Function Dispenser DC Motor When customer push the dispenser button Pull duct door and abstract from ice bank How to Measure Dispensor DC Motor Standard Dispenser DC Motor 1 to 2 9 9 12 19 55 11 6 AC Motor ASSEMBLY Function The motor in the door pushed the ice into the dispenser How to lt In door Motor gt lt In door Motor gt Measure Za t wA 1 Separate the 7224 ae 1 Separate the hou sing x 0 4 housing Measure the _ 2 Measure the resistance between resistance between 1 and 2 a 1 and 3 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 res
47. repeating overrun LED four time repetiton PEGE Gl HERE dogging on on on on Off on off repeating LED five time repetiton GGG on Off on on off repeating LED six time repetiton circuit overcurrent error on on on on off on on on off repeating LED seven time repetiton PCB part IPM on on on on off on on on on on on off repeating 49 1 After resetting power check if it is running normal 2 1 the same symptom arises after the first action replace PCB 1 After resetting power check if it is running normal 2 1 the same symptom arises after the first action replace PCB 3 If the same symptom arises after the second action replace compressor 1 After resetting power check if it is running normal 2 If the same symptom arises after the first action replace PCB 3 If the same symptom arises after the second action replace compressor 1 After resetting power check if it is running normal If the same symptom arises after the first action replace PCB If the same symptom arises after the second action replace
48. resistance between power line in compressor and earth ground in refrigerator Inf Ohm Multi Multi Tester Tester Po Power E aN Co Common T N C Open terminal FC75LBNA 6 80 Meri aro rit Capacitor Gace Because of ambient temperature or operating 450V 18 5 situations the values shown can have slight deviation 66 12 4 Check D D1 Activate Protection logic Cycle check with protection logic We have to check Condenser fan and Freezer fan before performing Check D Locked Piston Current trip and stroke trip can be activated by other problems then the driver or compressor High Pressure Side Restricted Low Side Restriction Over charging Refrigerant Locked piston Stroke Stroke trip Y Low side Refrigeration leak Refrigerant leak D2 sealed system diagnosis Check as follows Check for Oil leaks Yes machine compartmen Repair leak at point where No Oil is present Check for oil Yes emaining in drip tra Check for Oil leakage at each joint No of the Evaporator Check Temp of Discharge line and Condenser A No Yes Comp Cond T gt Ambient temp 5deg Yes Sealed System is OK Heavy repair Check frost status Of Evaporator Evaporator inlet Heat Inlet tubing using heat gun When process line on compressor is opened and ref
49. ressor There is no need for routine condenser cleaning in normal Home operating environments If the environment is particularly greasy or dusty or there is significant pet traffic in the home the condenser should be cleaned every 2 to 3 months to ensure maximum efficiency If you need to clean the condenser e Remove the mechanical cover e Use a vacuum cleaner with a soft brush to clean the grille the open areas behind the grille and the front surface area of the condenser e Replace the mechanical cover 71 12 6 2 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 None Pattern Partial Equalization Equalization Very Fast Very Slow Very Slow Fast Very Fast Inefficient Partial Complete Compressor Restriction Restriction Condenser Cap Tube Temperature Sound Hotter than Normal Faint Room Temperature None to Weak Air Low Side Loss of Change Leak Compressor Not Pumping Yes Trace of Oil No Undercharge The equalization test is trying to restart a compressor using a start kit after it has been operating 72 13 ICEMAKER OPERATING METHOD AND TROUBLE SHOOTING 13 1 Icemaker s Basic Operating Method Start Position gt Adjusts Ice Tray to Start Position with power on Icemaking Waits unt
50. rigerant is not expelled because it has accumulated in condenser f fault is corrected after refrigerant is recaptured from sealed system change dryer Low side restriction can cause a stroke trip f fault is corrected after refrigerant is recaptured perform a sealed system evacuation and dryer replacement Check Suction line gt refrigerant is overcharged and suction line temperature is lower than ambient temperature about 5 10 degrees or frost is present 150mm from where the suction line enters the compressor 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 temperatures Customer complains of longer run times and poor cooling performance Lack of refrigerant can in some incidents cause piston over travel Pressure of refrigerant cycle is usually higher than ambient pressure therefore oil will flow out with the refrigerant at leak point Sealed system Welding point 1 Comp process stub 2 Comp discharge 3 Hot Line inlet 4 Drier inlet 5 Drier outlet 6 7 8 In Out Leakage Evaporator Replace Leakage Evaporator Evaporator inlet Evaporator outlet suction pipe Frost only PIp Is frost pattern uniform No
51. ring the operation Check the current for every 416 7us and if the Trip exceeds 1 86Arms more than three times at Comp ON forcibly stop and restart six minutes later 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 Cover PTC Compressor may fail due to breakdown of their insulating capabilities 4 Always use the Parts 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 Use only approved substitute parts Lock Piston Trip If stroke is under 5mm even if the current is more than 14Arms Take it as piston lock and restart after 2 30 of Comp OFF Check the current and stroke for every 416 7us and if the condition fits more than three times at Comp ON the Trip occurs 4 1 3 Remove the cover PTC IPM 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 3 Use a L shaped flap tooll to pry off the cover 4 Assembly in reverse order of disassembly 19 5 CIRCUIT DIAGRAM CIRCUIT DIAGRAMS EARTH PART DUCT HEATER PLUG TYPE AND COMP EARTH PART FUSE ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE
52. rs the Ice room will be controlled at the lowest temperature After 24 hours or if the Ice PLUS key is pressed again the Ice room will return to its previous temperature 5 During the first hour 1 Compressor Freezer Fan and Icing Fan run continuously 2 If a defrost cycle begins during the first 30 minutes of Ice Plus the Ice PLUS cycle will complete its cycle after defrosting has ended If the defrost cycle begins when Ice Plus has run for more than 30 minutes Ice PLUS will run for 40 minutes after the defrost is completed 3 If Ice PLUS is pressed during defrost Ice Plus Icon is on but this function will start seven minutes after defrost is completed and it shall operate for three hours 4 If Ice Plus is selected within seven minutes after compressor has stopped the compressor compressor delays seven minutes shall start after the balance of the delay time 6 For the rest of the 23 hours the Ice room will be controlled at the lowest temperature 14 1 13 How to set the display mode and cancel it 1 With the refrigerator door open keep pressing the Refrigerator Temp Button and ICE PLUS Button more than 5 seconds then it goes to the display mode with Special Beep Sound 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 79 14 1 14 Defrosting removing frost 1 Defrosting starts each t
53. screwdriver to pry back hooks on front underside of cover 2 Lift up cover Disconnect door switch wire harness and remove the cover Pull out the tube Disconnect all 3 wiring harnesses 4 Remove the grounding screw 5 6 Rotate hinge lever 6 counterclockwise Lift top hinge 7 free of hinge lever latch 8 CAUTION When lifting hinge free from the latch be careful that door does not fall forward 7 Lift door from middle hinge pin and remove door 8 Place the door with the insides facing up on a not scratch surface gt Right Door FIG 1 Open the door remove 1 screw on the top of the hinge cover Loosen top hinge cover screw 1 Lift up cover 2 2 Disconnect door switch wire harness and remove the cover 3 Rotate hinge lever 3 clockwise Lift top hinge 4 free of hinge lever latch 5 4 Lift door from middle hinge pin and remove door CAUTION When lifting hinge free from the latch be careful that the door does not fall forward 5 Place the door with the insides facing up on a not scratch surface Figure 2 Figure 3 Figure 1 1 Insert the tube until you can see only one of the lines printed on the tube 2 After inserting pull the tube to ascertain that itis secure 3 Assemble clip Incorrect Correct 3 2 DOOR Door Gasket Replacement e Mullion Removal 1 Insert gasket into channel Insert and press gasket into channels at doorliner 1 Remove 2 screws 2 Li
54. t cool No compressing operation STATE OF THE EVAPORATOR Low flowing sound of Refrigerant is heard and frost forms in inlet only Flowing sound of refrigerant is not heard and frost isn t formed Flowing sound of refrigerant is heard and frost forms in inlet only Flowing sound of refrigerant is not heard and frost isn t formed Flowing sound of refrigerant is not heard and frost melts Low flowing sound of refrigerant is heard and frost forms in inlet only Flowing sound of refrigerant is not heard and there is no frost TEMPERATURE OF THE COMPRESSOR A little higher than ambient temperature Equal to ambient temperature A little higher than ambient temperature Equal to ambient temperature Lower than ambient temperature A little higher than ambient temperature Equal to ambient temperature Refrigerant level is low due to a leak Normal cooling is possible by restoring the normal amount of refrigerant and repairing the leak No discharging of Refrigerant Normal cooling is possible by restoring the normal amount of refrigerant and repairing the leak Normal discharging of the refrigerant The capillary tube is faulty Normal discharging of the Refrigerant Cooling operation restarts when heating the inlet of the capillary tube Low pressure at high side of compressor due to low refrigerant level No pressure in the high pressure part of the comp

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