LG GB7138**XZ Series Service Manual Download

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4. Poor cooling in Refrigerator compartment

Checking flow

Check the sensor resistance.

Reset the unit and

Input Test 1 Mode.

(Push the button 1 time)

Open the fresh food door and

Check the air flow.

The sensor is determined by

the temperature.

For example, 30 indicates 0°C.

Result & SVC Action

Temperature

23°F / -5°C

32°F / 0°C

41°F / 5°C

50°F / 10°C

59°F / 15°C

Result

19.5

Status

Windy

No windy

SVC Action

Go to the 5

Check the damper

(Go to the 6)

Check the air temperature.

Cold or not?

Status

Cold

Not cold

SVC Action

Explain to customer

Check the Compressor

And sealed system

Open the fresh food door and

Check the air flow.

Status

Windy

No windy

SVC Action

Go to the 4

Check the Fan motor

(Next page)

<CON5>

Summary of Contents for GB7138**XZ Series

Page 1: ...G THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL http biz lgservice com MODEL COLOR REFRIGERATOR SERVICE MANUAL Ref No GB7143 GZ GB7143 HZ Ref No GB7143 RZ GB7138 XZ Ref No GB7143 RZ GB7138 XZ Ref No GB7143 AV GB7143 BV ...

Page 2: ...k the set for electric losses 2 Unplug prior to servcing to prevent electric shock 3 Whenever testing with power on wear rubber gloves to prevent electric shock 4 If you use any kind of appliance check regular current voltage and capacity 5 Don t touch metal products in the freezer with wet hands This may cause frostbite 6 Prevent water from following onto electric elements in the mechanical parts...

Page 3: ...ally charge the refrigerant R600a by changing open and close the Throttle Valve 5g at each time The charging hose must use a one way valve to prevent the refrigerant refluence Close the Schrader valve cap after the refrigerant R600a is completely recharged After you completely recharge the refrigerant R600a perform the leakage test by using a portable leakage detector or soapy water Test the low p...

Page 4: ...an Cooling Micom Control Full Automatic Heater Defrost Heater Sheath Heater L Cord R600a FREOL 60MT 310 cc FREOL 55MT 180 cc PTC Starting Type Pin Tube Type Wire Condenser Removable Glass Shelf Bottle Rack 1EA Vita LED 1EA Cover TV 1EA Rail 2EA Magic Crisper 1EA Vegetable Drawer 1EA OPTI Zone 1EA Egg Tray Dairy Corner Basket Door Basket Water Tank Tray Drawer 3EA Ice bin 1EA Twist Ice Maker Kit 1E...

Page 5: ...l Automatic Heater Defrost Heater Sheath Heater L Cord R600a FREOL 60MT 310 cc FREOL 55MT 180 cc PTC Starting Type Pin Tube Type Wire Condenser Removable Glass Shelf Bottle Rack 1EA Vita LED 1EA Cover TV 1EA Rail 2EA Magic Crisper 1EA Vegetable Drawer 1EA OPTI Zone 1EA Egg Tray Dairy Corner Basket Door Basket Water Tank Tray Drawer 3EA Ice bin 1EA Twist Ice Maker Kit 1EA Auto Ice Maker Guide Rail ...

Page 6: ...ank Optional Water Pump Optional Basket Door EZ Open Handle Optional Removable Glass Shelf Bottle Rack OPTI Zone Optional Auto Twisting Ice Maker Ice Box Freezer Compartment Wire Shelf Leveling Screw Vegetable Drawer Used to keep fruits and vegetables etc fresh and crisper Water Tank ...

Page 7: ...Tank Optional Water Pump Optional Basket Door EZ Open Handle Optional Removable Glass Shelf Bottle Rack OPTI Zone Optional Twist Ice Tray Ice Box Freezer Compartment Wire Shelf Leveling Screw Vegetable Drawer Used to keep fruits and vegetables etc fresh and crisper ...

Page 8: ... Water Tank Optional Water Pump Optional Basket Door EZ Open Handle Optional Removable Glass Shelf Bottle Rack Fresh 0 Zone Twist Ice Tray Ice Box Freezer Compartment Wire Shelf Leveling Screw Vegetable Drawer Used to keep fruits and vegetables etc fresh and crisper ...

Page 9: ...ional Basket Door Basket Door EZ Open Handle Optional Removable Glass Shelf Bottle Rack Vegetable Drawer Used to keep fruits and vegetables etc fresh and crisper Twist Ice Tray Ice Box Freezer Compartment Wire Shelf Leveling Screw Fresh 0 Zone GB7138 VW GB7138 X W Z ...

Page 10: ...do not move the cabinet until door swing reversal is completed These instructions are for changing the hinges from the right side to the left side if you ever want to change the hinges back to the right side follow these same instructions and reverse all references to left and right Befor Removing the Doors empty and Remove all the Door Baskets of both Refrigerator Freezer Doors including the Bank...

Page 11: ...and move the COVER HINGE 8 to side of DECO COVER 7 Disassemble the Housing Connector 9 inside of the DECO COVER 7 3 Remove the screws 10 in the COVER PWB 11 and remove the COVER PWB 11 4 Remove the screws 12 in the TOP COVER FRONT 13 and remove the TOP COVER FRONT 13 5 Remove the HOLDER CORD 14 placed in right and insert it to center And then move COVER FRONT 16 Take out the HOLDER CORD spare 15 a...

Page 12: ...HINGEC 23 and then remove HINGE C 23 Remove the freezer door Move in left side of the refrigerator CAP 24 Move to left side of the refrigerator door BRACKET DOOR 25 and screw 26 10 Assemble the HINGE L Freezer Door HINGE C 23 Refrigerator Door HINGE U 19 TOP COVER FRONT 13 COVER PWB 11 Connect the Housing Connector 9 DECO COVER 7 HANDLE 1 5 Note Reversing the doors is not covered by the warranty 9...

Page 13: ... Door Foam Assembly R GASKET Figure 7 Figure 9 3 REFRIGERATOR ROOM LAMP 1 Unplug the power cork the outlet 2 Remove all of the fridge compartment Involved removable glass shelf wine rack etc 3 Remove one screws in Case Control Refrigerator 4 Pull out the Grille Fan and Case Control Refrigerator 5 Disconnect the Housing of lead wire 6 Replace new one 7 Assembly in reverse order of disassembly 8 Rep...

Page 14: ... Defrost Control Assembly and replace new one Figure 12 Thermister Fuse Melting 4 FAN AND FAN MOTOR 1 Fridge 1 Remove all of the Fridge compartment 2 Remove one screw in Case Assembly Control REF 3 Pull out the Case Assembly Control REF 4 Disconnect the Housing of lead wire 5 Loose five screws fixed to the Bracket 6 Pull out Bracket and then remove the Fan Motor Assembly 2 Freezer 1 Remove all of ...

Page 15: ...by disconnecting the connectors 2 Exchanged Heater Sheath and connected the housing Heater Sheath 7 FREEZER HEATER SHEATH In this refrigerator Heater Sheath is used for defrosting heater During heating the temperature of heater rises about 300 350 Therefore be careful not to burn while servicing 1 After removing the Grille and Shroud separate the Heater Sheath by disconnecting the connectors 2 Exc...

Page 16: ...r the sound of pump working when you push the dispenser button 3 Check each connecting point of tubes Water tank assembly Case pump assembly Caution Do not use other beverage milk juice carbonated beverage etc than potable water Especially beverage including grain must not be used may result in failure Notice Pump may cause noise while water is being dispensed This is due to remove the water insid...

Page 17: ...mble a cover PTC of the compressor terminal and check the terminal connecting status at the B point in Figure Where there is no failure in the wiring status and resistance values are shown as infinite or several hundred it may be determined as defect of compressor Since if there is no failure in resistance values of the compressor it may be defective Main PWB replace the Main PCB and check for nor...

Page 18: ...rip To protect the compressor from abnormal operation this logic is used to temporally stop the refrigerator when abnormal operation occurs and to re operate it after abnormal signal disappears Compressor protection Logic Table If LED of PCB is blinking Refer to next page Stroke Trip Locked Piston Trip Current Trip IPM Fault App E Inv E Inv E Inv E Inv Requirement Piston overruns the designed rang...

Page 19: ...stem problem such as moisture restriction restriction at capillary tube or refrigerant leak Logic Compressor is forced to off and then tries to restart after 1 minute Protection logic Check B Blink 2 times Stroke Trip Check B2 Compressor Doesn t work Harness Connecting Check C Cycle Check E Fix Cycle Replace Driver PCB Y Y N Y N Repeat Check Procedure Stroke Trip Occur Reset Power Compressor Damag...

Page 20: ...charge 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 Protection logic Check B Blink 5 times Lock Piston Trip Check B3 Compressor Doesn t work Compressor Doesn t work Hi side restriction Repeat Check Procedure Reset Power Sealed system Repair Replace Compressor N Y N Y ...

Page 21: ...arge line compressor is damaged or IPM device is defective Logic Compressor is forced off and tries to restart after 2 5 minutes Protection logic Check B Blink 6 time Current Trip Check B4 Repeat Check Procedure Reset Power Replace Compressor NG Compressor Intermittently works IPM Check B5 Capacitor Spec Check C2 Replace Capacitor Current trip Occur Compressor Damage Check C3 Replace Driver PCB Fi...

Page 22: ... at Point A with a VOM Logic Compressor is forced off and tries to restart in 2 5 minutes Protection logic Check B Blink 7 times Lock Piston Trip Check B5 Compressor Doesn t work Short Test Point A Replace Drive PCB Repeat Check Procedure Replace Compressor Compressor Damage Check C3 Check IPM visual inspection turn off N N Y Y Power Reset Y NG A ...

Page 23: ...essure at low pressure side COMP capacity of the refrigerator using R609a as refrigerant is large by 1 7 times than that of the refrigerator using R134a Labels as in Figure are displayed at the compressor of a refrigerant for R600a and the back plate of refrigerator 4 Location and Environment for Heavy Repair Check that drafting and air ventilation are well done at a working area and perform work ...

Page 24: ...rator so that they are not closed Connect pinch pliers with a refrigerant discharging hose Place the outlet of a refrigerant discharging hose outside Remove fire appliances or heating sources near a refrigerant discharging hose Always use a refrigerant returnbag for working at the contained space Bore the charging pipe of a compressor with pinch pliers Remove fire appliances or heating sources nea...

Page 25: ...e pipe Vacuum working time should be for more than 10 minutes Suction Pipe Vacuum Pump Discharge refrigerant outside using window or door Pinch Plier Process Pipe Discharge Pipe 3 Welding Repair Step Required equipment Simple welding machine Remove pinch pliers if remaining refrigerant returnis completed Cut the front part of a process pipe with a cutter Check that remaining refrigerant comes out ...

Page 26: ...ing work and then connect a charging tube with welding 5 Vacuum Air Removal Required equipment Vacuum pump Connect a vacuum pump to a charging tube to perform vacuum cycle Vacuum work should be performed for an hour If vacuum time is short normal cooling performance may not be exerted due to failure of cooling cycle Charging Tube Suction Pipe Discharge Pipe ...

Page 27: ...re Bombe weight after 5 through 10 minutes to check remained refrigerant quantity to complete charging of refrigerant After charging refrigerant never perform welding work or work using fire appliances 7 Leak Inspection and Cycle Check Required equipment Leakage checking machine foam and leakage inspection machine Check for leakage by using form or a leakage inspection machine at the worked part i...

Page 28: ...e Clogged capillary tube Leakage of 3way valve Non insertion of valve housing Short circuit of valve L wire Defect or shortage of PCB Leakage of welding part Leakage of radiator Check of leakage part Leakage of refrigerant Defect or shortage of valve Poor operation of 3way valve Clogged cycle Surface of cooler is cold 8 Failure Checking Procedures ...

Page 29: ...falling a valve or giving a strong shock Poor operation and leakage quantity may be increased due to damage of inner parts 3 Entirely remove and check ice formation which occurred in Eva before or after improvement work for non insertion of 3 way valve housing defect or shortage of goods defective welding Since 3 way valve controls refrigerant with an inner plastic damper defect may occur because ...

Page 30: ... 30 CIRCUIT DIAGRAM ...

Page 31: ...s Poor contacting and broken Replace each component Replace the compressor Check current flowing in sub coil of Compressor Shorted Check capacity of OLP Lack of capacity The items described above are normal Coil of motor Compressor Running state of Compressor is poor Check current flowing in SWITCH DOOR Poor contacting Replace each component Fan motor doesn t run Check current flowing in the MOTOR...

Page 32: ...in high temperature section Front Part Set the control to mid position Set the control to warm position Dew or ice forms in the chamber of the set Is liquid food stored Check if put in is hot Did you open the door of the set too often or check if the door is closed up Seal up liquid foods with wrap Put in foods after cooled down Don t open the door too often and close it firmly Dew forms in the Ex...

Page 33: ...erant is not heard and frost isn t formed Equal to ambient temperature Normal discharging of Refrigerant MOISTURE CLOG Cooling operation stops periodically Flowing sound of Refrigerant is not heard and frost melts Low than ambient temperature Cooling operation restarts when heating the inlet of capillary tube CLOGGED BY DUST COMP RESSION Freezer and Refrigerator don t cool Low flowing sound of Ref...

Page 34: ...2 Keep the unpacked drier at the temperature of 80 100 C Don t keep the drier in a outdoors because humidity damages to it DRIER ASM 6 1 The pressure of dry air must be more han 12 16kg cm2 2 Temperature must be more than 20 70 C 3 Keep the pressure at 12 6kg cm2 also when substituting dry air for Nitrogen Gas DRY AND AIR NITROGEN GAS 7 1 Check if gas leaks with soapy water 2 Replace Quick Coupler...

Page 35: ... 35 Figure 24 LOKRING TOOL Figure 23 LOKRING ...

Page 36: ...lly applied or restored after a power failure it is automatically set to 20 3 Display Power saving Mode The display is always OFF without Lock Icon saving mode until door is opened or display button is pressed When 20 seconds has elapsed after closing door or pressing button the display turns OFF without Lock Temperature Adjustment Button for Freezer Compartment Temperature Adjustment Button for O...

Page 37: ...s maintained within 2 C 3 C regardless of ambient temperature Chill compartment is the special temperature zone 3 Express Frz Please select this function for prompt freezing This function is used when you want to freeze the foods quickly Press the Express Frz button once and then the quick freeze operation starts with the lamp on The Express Frz operation takes about 3 hours When its operation end...

Page 38: ...efrigerator returns to previous temperature setting 5 Lock For LED Model Pressing this button stops operation of other buttons Locking or Un Locking is repeated whenever pressing the LOCK button For Locking press the LOCK button for 3 sec For Un Locking press the LOCK button for 3 sec When LOCK is activated pressing the other buttons would not work 6 Power On Off Pressing this button refrigerator ...

Page 39: ...splay dispenser and lights to operate without running the compressor and fan To apply the DEMO mode open the door and press and hold the REFRIGERATOR and EXPRESS FRZ buttons simultaneously for 5 second To exit the DEMO mode and return to normal operation press and hold the REFRIGERATOR and EXPRESS FRZ for 5 second Best Better Better Best ...

Page 40: ...or of Freezer Defrost 80minute later After starting defrost If sensor doesn t be over 5 C 8 Poor of Refrigerator Defrost 50minute later After starting defrost If sensor doesn t be over 10 C Cut or short circuit wire 9 Failure of Fan Motor at Freezing Compartment FF If there is no fan motor signal for more 65 sec in operation fan motor 10 Failure of Fan Motor at Refrigerator Compartment 11 Failure ...

Page 41: ...oor of Freezer Defrost 80minute later After starting defrost If sensor doesn t be over 5 C 7 Poor of Refrigerator Defrost 50minute later After starting defrost If sensor doesn t be over 10 C 8 Failure of Fan Motor at Freezing Compartment FF If there is no fan motor signal for more 65 sec in operation fan motor 9 Failure of Fan Motor at Refrigerator Compartment 10 Failure of Fan Motor at Mechanical...

Page 42: ...t wire 6 Poor of Freezer Defrost 80minute later After starting defrost If sensor doesn t be over 5 C 7 Poor of Refrigerator Defrost 50minute later After starting defrost If sensor doesn t be over 10 C 8 Failure of Fan Motor at Freezing Compartment FF If there is no fan motor signal for more 65 sec in operation fan motor 9 Failure of Fan Motor at Refrigerator Compartment 10 Failure of Fan Motor at ...

Page 43: ...10min Failure of Refrigerator Sensor 4 No Defrosting Failure of Freezer Defrost Sensor 6 Poor of Freezer Defrost 11 Failure of Communication 7 Poor of Refrigerator Defrost 5 No Defrosting Failure of Refrigerator Defrost Sensor 8 Every 30min On Off Failure of Fan Motor at Freezing Compartment 9 Every 30min On Off Failure of Fan Motor at Refrigerator Compartment 10 Every 30min On Off Failure of Fan ...

Page 44: ... 44 PCB Picture 1 Main PCB P No MFG EBR652501 Picture CON5 CON1 CON2 CON201 CON3 CON6 CON8 ...

Page 45: ... 45 2 Display PCB P No EBR64736301 EBR65008001 EBR65255701 Picture EBR65256001 ...

Page 46: ...ng With Error Display 1 Freezer Sensor Error FS No 1 2 Checking flow Check for a loose connection Check the Blue to Blue Result SVC Action CON5 Temperature table 1 1 To 2 22 F 30 C 13 F 25 C 4 F 20 C 5 F 15 C 14 F 10 C 23 F 5 C 32 F 0 C Result 40 30 23 17 13 10 8 The sensor is determined by the temperature For example 23 indicates 20 C ...

Page 47: ...Result SVC Action 2 Fridge Sensor Error rS 1 Checking flow Check for a loose connection Check the White to White Result SVC Action Temperature table 2 Temperature 23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C Result 38 30 24 19 5 16 The sensor is determined by the temperature For example 30 indicates 0 C CON5 ...

Page 48: ...esistance Table 2 Result SVC Action No 1 2 Checking flow Check for a loose connection Check the Brown to Brown Result SVC Action Temperature table 2 Temperature 23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C Result 38 30 24 19 5 16 The sensor is determined by the temperature For example 30 indicates 0 C CON5 ...

Page 49: ... Defrost Sensor Error dS F No 1 2 Checking flow Check for a loose connection Check the Violet to Violet Result SVC Action CON5 CON5 The sensor is determined by the temperature For example 23 indicates 20 C Temperature table 3 1 To 2 22 F 30 C 13 F 25 C 4 F 20 C 5 F 15 C 14 F 10 C 23 F 5 C 32 F 0 C Result 40 30 23 17 13 10 8 ...

Page 50: ...ow Check the Door gasket Check the Defrost control part 3 Input Test 2 Mode Push the button 2 times 4 Check the Brown to Blue Result SVC Action Fuse M Def Heater Def Sensor 5 Release the test mode Push the button 1 times Normal CON3 Result 220 240 V 0 V SVC Action Go to the 5 Replace Main PCB 6 Check the Brown to Blue Result 0 V 220 240 V SVC Action Explain to customer Replace Main PCB CON3 ...

Page 51: ... Defrost Sensor Error dS r No 1 2 Checking flow Check for a loose connection Check the Violet to Violet Result SVC Action CON5 CON5 The sensor is determined by the temperature For example 23 indicates 20 C Temperature table 3 1 To 2 22 F 30 C 13 F 25 C 4 F 20 C 5 F 15 C 14 F 10 C 23 F 5 C 32 F 0 C Result 40 30 23 17 13 10 8 ...

Page 52: ...w Check the Door gasket Check the Defrost control part 3 Input Test 2 Mode Push the button 2 times 4 Check the Orange to Blue Result SVC Action Fuse M Def Heater Def Sensor 5 R elease the test mode Push the button 1 times Normal CON3 Result 220 240 V 0 V SVC Action Go to the 5 Replace Main PCB 6 Check the Orange to Blue Result 0 V 220 240 V SVC Action Explain to customer Replace Main PCB CON3 ...

Page 53: ... an error code is displayed the fan is not working 3 Check the Fan motor Rotate fan using your hand It feel sticky change the motor Cause of ice or rust inside of motor 4 Check the Fan motor voltage Result SVC Action Below 12 V 0 or 5 V 1 2 2 3 Change the PCB Change the motor Point Result SVC Action Status No windy Windy SVC Action Go to 3 Go to 4 CON6 1 2 3 ...

Page 54: ...an error code is displayed the fan is not working 3 Check the Fan motor and surrounding Rotate fan using your hand It feel sticky change the motor Result SVC Action 4 Check the Fan motor voltage Below 12 V 0 or 5 V 1 2 2 3 Change the PCB Change the motor Result SVC Action Status No windy Windy SVC Action Check motor Go to the 5 CON6 2 3 1 ...

Page 55: ...While an error code is displayed the fan is not working 3 Check the Fan motor Rotate fan using your hand It feel sticky change the motor Cause of ice or rust inside of motor 4 Check the Fan motor voltage Result SVC Action Below 12 V 0 or 5 V 1 2 1 3 Change the PCB Change the motor Point Result SVC Action Status No windy Windy SVC Action Go to 3 Go to 4 CON6 3 2 1 ...

Page 56: ...Brown CON8_Main CON8_Main 6 Check the Sky Blue to Brown CON101_display 3 Check the White to Brown Result 0 V or 5 V Other SVC Action Change the Display PCB Go to the 4 4 Check the Sky Blue to Brown Result 0 V or 5 V Other SVC Action Change the Main PCB Go to the 5 Result 0 V or 5 V Other SVC Action Change the Display PCB Go to the 6 Result 0 V or 5 V Other SVC Action Change the Main PCB Explain to...

Page 57: ...Without Error Display 1 Vegetable LED doesn t work No 1 2 Checking flow Check the loose connection Check the Purple to Orange Blue Result SVC Action Result 0 or 12 V Other SVC Action Explain to customer Change the PCB CON5 ...

Page 58: ...ed to white Black Normal Push S W 0 2 V Other 10 12 V Other Explain to customer Change the PCB Explain to customer Change the PCB Status Result SVC Action Normal Push S W 5 V Other 0 V Other Go to the 4 Change the PCB Go to the 4 Change the PCB Status Result SVC Action Normal Push S W 0 not Infinity Go to the 3 Change door S W Go to the 3 Change door S W Status Result SVC Action ...

Page 59: ...ck the door S W resistance 4 Check the White to Sky Blue 5 Check the Red to White Black Closed Open 5 V Other 0 V Other Go to the 4 Change the PCB Go to the 4 Change the PCB Status Result SVC Action Normal Push S W 0 not Infinity Go to the 3 Change door S W Go to the 3 Change door S W Status Result SVC Action CON4 Result 12 V Other SVC Action Explain to customer Change the PCB CON6 ...

Page 60: ...ample 30 indicates 0 C Result SVC Action Temperature 23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C Result 38 30 24 19 5 16 Status Windy No windy SVC Action Go to the 5 Check the damper Go to the 6 5 Check the air temperature Cold or not Status Cold Not cold SVC Action Explain to customer Check the Compressor And sealed system 3 Open the fresh food door and Check the air flow Status Windy No windy...

Page 61: ...nd It feel sticky change the motor Cause of ice or rust inside of motor Result SVC Action 7 Check the Fan motor voltage Below 12 V 0 or 5 V 1 2 2 3 Change the PCB Change the motor Point Result SVC Action Sticky Motor Change the motor Point Result SVC Action CON6 3 2 1 ...

Page 62: ...he sensor is determined by the temperature For example 23 indicates 20 C Result SVC Action 4 Check the air temperature Cold or not Status Cold Not cold SVC Action Explain to customer Check the Compressor And sealed system 1 To 2 22 F 30 C 13 F 25 C 4 F 20 C 5 F 15 C 14 F 10 C 23 F 5 C 32 F 0 C Result 40 30 23 17 13 10 8 Status Windy No windy SVC Action Go to the 4 Check the Fan motor Next page CON...

Page 63: ...nd It feel sticky change the motor Cause of ice or rust inside of motor Result SVC Action 6 Check the Fan motor voltage Below 12 V 0 or 5 V 1 2 2 3 Change the PCB Change the motor Point Result SVC Action Sticky Motor Change the motor Point Result SVC Action CON6 1 2 3 ...

Page 64: ...eck the air flow The sensor is determined by the temperature For example 30 indicates 32 F Result SVC Action Temperature 23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C Result 38 30 24 19 5 16 Status Windy No windy SVC Action Go to the 4 Check the damper Go to the 5 4 Input Test 2 Mode and Check the air flow Push the button 1 time Status Windy No windy SVC Action Go to the 5 It s normal CON5 ...

Page 65: ...d by the temperature For example 24 indicates 20 C Result SVC Action 4 Input Test 2 Mode Push the button 1 time 5 Check the Black to Blue 1 To 2 22 F 30 C 13 F 25 C 4 F 20 C 5 F 15 C 14 F 10 C 23 F 5 C 32 F 0 C Result 40 30 23 17 13 10 8 Test 1 mode 230 V Other Go to the 4 Change the PCB Status Result SVC Action Test 2 mode 0 2 V Other Explain to customer Change the PCB Status Result SVC Action CO...

Page 66: ...emoving 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 Forced defrost mode 22 22 displayed Main PWB AC TPA DC TPA ...

Page 67: ... 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 68: ... 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 69: ... 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 113 F 45 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 5 19 VOLTAGE 4 79 V 4 72 V 4 64 V 4 54 V 4 43 V 4 29 V 4 13 V 3 95 V 3 75 V 3 54 V 3 31 V 3 07 V 2 83 V 2 59 V 2 35 V 2 13 V 1 91 V 1 71 V ...

Page 70: ...At this point there is no further check of the fan motor 2 Aug 2007 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 de...

Page 71: ...each part are subject to change in different localities 330B 332A 404A 281B 103A 108A 283B 106B 106B 282B 406A 135A 102A 109C 102B 406B 411C 411B 610E 327B 327B 283A 301B EXPLODED VIEW 103B 109A 302B 120A 120C 120C 120B 135B 120E 120F 404A 135E 137A 137B 135C ...

Page 72: ...7043 T 136E 169A 169B 140A 136F 136C 151B 136G 125C 241A 205F 283C 206D 205F 283C 206D 154A 154D 154E 154E 154C 241B 234D 281A 212G 231A 234A 233A 201A 203A 210A 211A 210A 212A 503B 503F 503A 281D 241A 136B 136H ...

Page 73: ...e parts of refrigerator and the shape of each part are subject to change in different localities EXPLODED VIEW 315C 315B 315A 315B 315C 314A 105A 329C 310B 319A 319C 420A 309B 312A 410G 501F 411A 304A 323B 501A 410L 310A 303C 303A 619A 318A 317A 311B 307A 316B ...

Page 74: ...P No MFL64999802 JAN 2011 Printed in Poland ...

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LG GB7138**XZ Series, Service Manual

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