LG LFXS27466S Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Refrigerator
  5. LFXS27466S
  6. Service manual

LG LFXS27466S Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

MODEL : LFXS27466S
COLOR : STAINLESS(ST)
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless
you have obtained the prior written consent of the LG Electronics entity from which you received this
Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or
logos in this Service Manual.
Copyright © 2016-2017 LG Electronics Inc. All rights reserved. Only training and service purposes

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LFXS27466S and is the answer not in the manual?

Questions and answers

Related Manuals for LG LFXS27466S

Summary of Contents for LG LFXS27466S

  • Page 1 Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

  • Page 2: Table Of Contents

    3. Take caution not to get water near any electrical components. 4. Use exact replacement parts. 5. Remove any objects from the top prior to tilting the product. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes. - 2 -...

  • Page 3: Specifications

    1. SPECIFICATIONS 1-1 LFXS27466S ● 27 cu.ft. ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Clear Drawer Type 3 /4 3 /8 3 /4 DIMENSIONS (inches) X 35 X 69 (WXDXH) 27cu.ft. COMPRESSOR Linear NET WEIGHT (pounds) 155kg (342lb)

  • Page 5: Disassembly

    3. DISASSEMBLY 3-1 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 (4).-FIG. 1 2. Open door. Loosen top hinge cover screw (1). Use flat tip screwdriver to pry back hooks on front underside of cover (2).

  • Page 6: Door

    3-2 DOOR Door Gasket Replacement ● 1. Insert gasket into channel Mullion Removal ● Press gasket into channels on the four remaining 1. Remove 2 screws. sides of door. Figure 5 Figure 1 2. Lift Mullion up carefully. ● Mullion Replacement 1.

  • Page 7: Door Alignment

    3-3 Door Alignment * Ice Fan Scroll Assembly Replacement If the space between the door are uneven, 1) Remove the plastic guide on the left side, using a follow the instructions to align them. phillips screwdriver to remove the screws. Remove the Base Grillie.

  • Page 8: Lamp

    3-6 LAMP 3-6-2 Freezer Compartment Lamp 1. Unplug refrigerator power cord form outlet. Unplug, or disconnect power at the circuit breaker. 2. Remove screw with driver. If necessary, remove top shelf or shelves. 3. Grasp the cover Lamp, pull the cover downward. 3-6-1 Refrigerator Compartment Lamp 1) Release 2 screws.

  • Page 9: Main Pwb

    3-8 MAIN PWB 1) Loosen 3 screws on the PWB cover. Figure 26 Figure 27 5) Remove the 4) Holding the inner side of lead wire. the dispenser pull forward to remove. Figure 20 CAUTION: When replacing the dispenser cover make sure the lead wire does NOT come off and the water line 2) Remove the PWB cover is not pinched by the dispenser.

  • Page 10: Water Button Assmebly

    3-12 WATER BUTTON ASSMEBLY 3-14 ICEMAKER REPLACEMENT 1) Remove screws. 1) Remove 4 screws as shown. 2) Grasp the Button assembly and lift. Button Lever Figure 31 Figure 33 2) Grasp the bottom of motor cover assembly and pull slowly. 3-13 ICE CORNER DOOR REPLACEMENT 1) Loosen the front screw as shown in the picture.

  • Page 11: Sub Pwb For Working Dispenser

    CAUTION: Make sure that the motor housing is taped to 3-16 CAP DUCT MOTOR REPLACEMENT the mold, if not positioned correctly the cover will not fit 1) Separate the Housing of the Cap Duct Motor. properly. Figure 39 2) Unscrew 3 screws to disassemble the motor. Figure 36 Figure 40 3) When replacing the motor, check the position of the door...

  • Page 12: How To Remove A Ice Bin

    3-17 HOW TO REMOVE A ICE BIN 3-18 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) Figure 44 Figure 47 2) Tilt and lift slightly as shown. Figure 45 3) Remove ice bin slowly.

  • Page 13: How To Remove And Reinstall The Pullout Drawer

    3-19 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3-19-1 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 lifting clear from each side).
  • Page 14 3-19-2 Follow Steps to Reinstall ① Assemble a bar and gear ice with screw. Step 1) Insert both side of supporter cover tv into Step 2) ② Push the otherside of the gear to inside of the connector rails, and then screw them. bar.

  • Page 15: Water Valve Disassembly Method

    3-20 WATER VALVE DISASSEMBLY METHOD 3-21 FAN AND FAN MOTOR DISASSEMBLY METHOD 1) Turn off the water to unit. Remove the waterline from the 1) Remove screws for the Drain Pipe Assembly and the 1 valve. connected to the Motor Cover. MOTOR COVER Figure 64 Figure 60...

  • Page 16: Drawer Removal

    3-22 Drawer Removal Fully extend the drawer and lift from the front pulling straight out. Figure 66 To install the drawer back into the frame, tilt the front sightly and pushingt back into place. Figure 67 - 18 -...

  • Page 17: Adjustment

    4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 Compressor protection logic Since linear Comp conducts linear reciprocating motion, ● 4-1-1 Role we have protection logic for compressor, motor and PCB The compressor intakes low temperature and low pressure as the below. gas from the evaporator of the refrigerator and compresses this gas to high-temperature and high-pressure gas.

  • Page 18: Circuit Diagram

    5. CIRCUIT DIAGRAM - 20 -...

  • Page 19: Troubleshooting

    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 3 hours after the error : All errors, except for "Er rt", "Er HS", "Er IS(except for Icing sensor)", "Er gF", "Er It"...

  • Page 20: Pcb Picture

    7. PCB Picture 7-1. Main PCB ( P/N : EBR747964**) CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 7-2. Display PCB ( P/N : EBR786319**) CON101 CON102 CON103CON105...
  • Page 21 7. PCB Picture 7-3. Sub PCB ( P/N : EBR60070711/33)

  • Page 22: Troubleshooting With Error Display

    8. Trouble Shooting 8-1. Freezer Sensor Error (Er FS) Symptom Check Point 1. Er FS 1. Check for a loose connection 2. Check Sensor Resistance CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 Resistance [Ω] Short CON7 Open pin ~ 16 Other Normal CON7...
  • Page 23 Freezer Sensor Error (Er FS) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON7 CON7 Resistance [Ω] pin ~ 16...
  • Page 24 8-2. Refrigerator Sensor Error (Er rS) Symptom Check Point 1. Er rS 1. Check for a loose connection 2. Check Sensor Resistance CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 Resistance [Ω] Short CON7 Open pin ~ 14 Other Normal CON7 Resistance [Ω] pin ~ 14...
  • Page 25 Refrigerator Sensor Error (Er rS) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON7 CON7 Resistance [Ω] pin ~ 14...
  • Page 26 8-3. Icing Sensor Error (Er IS) Symptom Check Point 1. Er IS 1. Check for a loose connection 2. Check Sensor Resistance CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 Resistance [Ω] CON5 Short pin ~ 17 Open Other Normal CON5 Resistance [Ω] pin ~ 17...
  • Page 27 Icing Sensor Error (Er IS) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON5 Resistance [Ω] pin ~ 2 -22ºF / -30ºC...
  • Page 28 8-4. Defrost Sensor Error (Er dS) Symptom Check Point 1. Er dS 1. Check for a loose connection 2. Check Sensor Resistance CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 Resistance [Ω] Short CON7 Open pin ~ 18 Other Normal CON7 Resistance [Ω] pin ~ 18...
  • Page 29 Defrost Sensor Error (Er dS) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB, Is resistance normal? connector Defrost controller and Sensor? Check the Temperature and resistance refer to the table. No problem? CON7 Resistance [Ω] pin ~ 18...
  • Page 30 8-5. Ice Maker Motor Error (Er It) Symptom Check Point 1. Er It 1. Check the Ice maker rotation 2. Check the motor voltage CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4...

  • Page 31: Troubleshooting Without Error Display

    Ice Maker Motor Error (Er It) Change the Explain to Main PCB Input Ice Maker test mode(Push customer Check the ice maker forward status The ice maker test button),check The voltage (1)~(2) point 0V? The Ice Tray,Ice maker motor Rotate? Change the Check the ice maker reverse status Main PCB...
  • Page 32 8-6. Defrost Heater Error (Er dH) Symptom Check Point 1. Er dH 1. Check the door gasket 2. Check the Defrost control part 3. Check the PCB output voltage CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 Part Resistance [Ω] FUSE-M Defrost Heater 34~42...
  • Page 33 Defrost Heater Error (Er dH) Input Test 3 Mode Replace the Replace (Push the button 3 times) Check the Door gasket . Check the Heater Voltage. Door gasket Main PCB Is door gasket damaged? Is voltage 220~240V? Change TEST MODE 3 Voltage [V] Defrost Check the Defrost control part.
  • Page 34 8-7. Freezer Fan Error (Er FF) Symptom Check Point 1. Er FF 1. Check the air flow 2. Check the Fan Motor 2. Check the PCB Fan motor voltage CON2 CON3 CON5 CON1 Fan Motor CON6 CON201 CON7 CON4 TEST MODE 1 Voltage [V] CON7 8~12V...
  • Page 35 Freezer Fan Error (Er FF) Reset the unit and Replace Input Test1 Mode. Check the Fan Motor voltage Main PCB (Push the button 1 time) Is Fan Motor voltage 8~12V? CON7 TEST MODE 1 Voltage [V] Go to 3 Open the freezer door and Check CON7 the air flow.
  • Page 36 8-8. Icing Fan Error (Er IF) Symptom Check Point 1. Er IF 1. Check the air flow 2. Check the Connector 2. Check the PCB Fan motor voltage CON2 CON3 CON5 CON1 Fan Motor CON6 CON201 CON7 CON4 TEST MODE 1 Voltage [V] CON7 8~12V...
  • Page 37 Freezer Fan Error (Er IF) Reset the unit and Replace Input Test1 Mode. Check the Fan Motor voltage Main PCB (Push the button 1 time) Is Fan Motor voltage 8~12V? CON7 TEST MODE 1 Voltage [V] Go to 3 Open the freezer door and Check CON7 the air flow.
  • Page 38 8-9. Condenser Fan Error (Er CF) Symptom Check Point 1. Er CF 1. Check the air flow 2. Check the Connector 2. Check the PCB Fan motor voltage Fan Motor CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 TEST MODE 1 Voltage [V] CON7 8~12V...
  • Page 39 Condenser Fan Error (Er CF) Reset the unit and Replace Input Test1 Mode. Check the Fan Motor voltage Main PCB (Push the button 1 time) Is Fan Motor voltage 8~12V? CON7 TEST MODE 1 Voltage [V] Go to 3 Check the fan rotating. CON7 Does fan rotate? 8~12V...
  • Page 40 8-10. Communication Error (Er CO) Symptom Check Point 1. Er CO 1. Check the loose connection 2. Check the Hinge connection CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 Display Voltage [V] CON101 pin ~ 6 CON101 Not 0V, 5V pin ~ 5 CON101 Not 0V, 5V...
  • Page 41 Communication Error (Er CO) Change the Main PCB Check the voltage. Is CON101 5 pin ~ 3 voltage 0V or 5V? Check the loose connection Voltage Housing CON101 pin ~ 3 0V, 5V Check the Check the voltage. Hinge (loose connection) Is CON101 5 pin ~ 6...
  • Page 42 8-11. Cube mode doesn’t work Symptom Check Point 1. Cube mode 1. Check the loose connection doesn’t work 2. Check the resistance CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 CON1 CON2 (BK) (WH) Ice Maker Geared Motor Dispenser Motor...
  • Page 43 8-11. Cube mode doesn’t work LEVER S/W Voltage [V] Resistance [Ω] Geared Motor Pushing 112~115V 31.1 ~ 42.1 CON2 Dispenser Motor 9.9 ~ 12.1 pin ~ 12 0~2V Pushing Pushing 9~12V CON3 5 pin ~ CON1 13 0~2V Pushing...
  • Page 44 Cube mode doesn't work Replace Geared Motor Check the resistance value. Is Geared Motor resistance 144~ 176Ω? Check the loose connection Check the voltage. Geared Motor Change the (while pushing the lever S/W) Is voltage correct? Resistance [Ω] Geared Motor CON2 31.1 ~ 42.1 (BK)
  • Page 45 8-12. Crush mode doesn’t work Symptom Check Point 1. Crush mode 1. Check the loose connection doesn’t work 2. Check the resistance CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 CON1 CON2 (SB) (WH) Ice Maker Geared Motor Dispenser Motor...
  • Page 46 8-12. Crush mode doesn’t work LEVER S/W Voltage [V] Resistance [Ω] Geared Motor Pushing 112~115V 31.1 ~ 42.1 CON2 Dispenser Motor 9.9 ~ 12.1 pin ~ 4 0~2V Pushing Pushing 9~12V CON3 5 pin ~ CON1 13 0~2V Pushing...
  • Page 47 Crush mode doesn't work Replace Geared Motor Check the resistance value. Is Geared Motor resistance 87 ~ 107Ω? Check the loose connection Check the voltage. Geared Motor Change the (while pushing the lever S/W) Is voltage correct? Resistance [Ω] Geared Motor 31.1 ~ 42.1 CON2 (SB)
  • Page 48 8-13. Water mode doesn’t work Symptom Check Point 1. Water mode 1. Check the loose connection doesn’t work 2. Check the resistance valve (PR) (BL) CON2 LEVER S/W Voltage [V] Pushing 112~115V CON2 pin ~11 0~2V Pushing Resistance [Ω] Pilot Valve 360~420 Water valve 360~420...
  • Page 49 Water mode doesn't work Replace Check the loose connection Water Valve Check the resistance value. Is Water Valve resistance 360~420 Ω? Change the Check the voltage. (while pushing the lever S/W) Is voltage correct? Water Valve Resistance [Ω] Water valve 360~420 LEVER S/W Voltage [V]...
  • Page 50 8-14. Refrigerator room lamp doesn’t work Symptom Check Point 1. Refrigerator room 1. Check the Refrigerator door switch sticky lamp doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 Door S/W CON6...
  • Page 51 Refrigerator room lamp doesn’t work Change the Check the LED Lamp voltage. Change the Check the Refrigerator door switch. Door S/W Is it 0~2V? (While door closed) Door S/W Does it feel sticky? Change the Check the door S/W resistance. Door S/W 5 Check the LED Lamp voltage.
  • Page 52 8-15. Freezer room lamp doesn’t work Symptom Check Point 1. Freezer room lamp 1. Check the Freezer door switch sticky doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp CON2 CON3 CON5 CON1 CON6 CON201 CON7 F room LED PCB CON4 Door S/W...
  • Page 53 Freezer room lamp doesn’t work Change the Change the Check the Freezer door switch. Door S/W LED Lamp Check the LED Lamp voltage Does it feel sticky? Is voltage 12V? (While door open) Change the Check the door S/W resistance. Door S/W Is it correct compared with table? Explain to customer...
  • Page 54 8-16. Poor cooling in Fresh food section Symptom Check Point 1. Poor cooling in Fresh 1. Check the sensor resistance food section 2. Check the air flow 3. Check the air Temperature 4. Check the R-Damper motor voltage CON2 CON3 CON5 CON1 Duct...
  • Page 55 Poor cooling in Fresh food section Check the Compressor Check the air temperature. and sealed Is it cold? system Check the sensor resistance. Go to 7 Check the Fan Motor voltage CON7 Replace Is Fan Motor voltage 8~12V? Resistance [Ω] Main PCB pin ~ 14 23ºF / -5ºC...
  • Page 56 8-17. Poor cooling in Freezer compartment Symptom Check Point 1. Poor cooling in 1. Check the sensor resistance Freezer compartment 2. Check the air flow 3. Check the air Temperature 4.Check the Fan motor sticky 4. Check the Fan motor voltage CON2 CON3 CON5...
  • Page 57 Poor cooling in Freezer compartment Check the Compressor Check the air temperature. and sealed Is it cold? Check the sensor resistance. system Change the CON7 Fan motor Resistance [Ω] Check the Fan motor. pin ~ 16 Rotate fan using hand. It feel sticky? -22ºF / -30ºC -13ºF / -25ºC...
  • Page 58 Replace Check the Fan Motor voltage Main PCB Is Fan Motor voltage 8~12V? TEST MODE 1 Voltage [V] CON7 8~12V pin ~ 12 Change the Check the Fan Motor voltage motor Is Fan Feed Back voltage 1~5V? TEST MODE 1 Voltage [V] CON7 Not 0V, 5V...
  • Page 59 8-17. Over cooling in Freezer compartment Symptom Check Point 1. Over cooling in 1. Check the sensor resistance Freezer compartment 2. Check the air flow 3. Check the air Temperature 4.Check the Fan motor sticky 4. Check the Fan motor voltage CON2 CON3 CON5...
  • Page 60 Over cooling in Freezer compartment Change the Fan motor Check the Fan motor. Rotate fan using hand. Check the sensor resistance. It feel sticky? Fan Motor CON7 Resistance [Ω] pin ~ 16 -22ºF / -30ºC -13ºF / -25ºC -4ºF / -20ºC Change the Main PCB -13ºF / -25ºC 14ºF / -10ºC...
  • Page 61 8-18. Home Bar Heater do not work Symptom Check Point 1. Home Bar do not work 1. Check the Main PCB 2. Check the Home Bar Heater CON2 CON3 CON5 CON1 CON6 CON201 CON7 CON4 Part Resistance [Ω] Defrost Heater 1912~2314 TEST MODE 3 Voltage [V]...
  • Page 62 Home Bar Heater do not work) Input Test 3 Mode Replace the Replace (Push the button 3 times) Check the Door gasket . Check the Heater Voltage. Door gasket Main PCB Is door gasket damaged? Is voltage 112~116V? Connect the TEST MODE 3 Voltage [V] housing...
  • Page 63 8-19. Hygiene fan doesn’t work Symptom Check Point 1. Hygiene fan doesn’t 1. Check Hygiene Fan motor voltage work 2. Main PCB CON2 CON3 CON5 CON1 CON6 CON201 CON7 Hygiene Fan motor CON4 CON6 Voltage [V] CON6 pin ~ 6...
  • Page 64 Hygiene fan doesn’t work Change the Change the Fan motor Check the Hygiene voltage Choose the Hygiene Max in display Is voltage 12V? (While door open) Check the PCB Voltage. Is CON6 2 pin ~ 6 voltage 12V? Voltage [V] CON6 pin ~ 6 Explain to customer...
  • Page 65 8-20. Hygiene LED doesn’t work Symptom Check Point 1. Hygiene LED 1. Check Hygiene LED voltage doesn’t work 2. Main PCB CON2 CON3 CON5 CON1 CON6 CON201 CON7 Hygiene LED CON4 CON6 Voltage [V] CON6 pin ~ 6...
  • Page 66 Hygiene LED doesn’t work Change the Change the Fan motor Check the Hygiene LED voltage Choose the Hygiene Max in display Is voltage 12V? (While door open) Check the PCB Voltage. Is CON6 4 pin ~ 6 voltage 12V? Voltage [V] CON6 pin ~ 6 Explain to customer...

  • Page 67: Reference

    10. REFERENCE 10-1 TEST MODE and Removing TPA 1. How to enter the TEST MODE Push the test button on the Main PCB to enter the TEST MODE. * 1 time : Comp / Damper / All FAN on (Everything is displayed) * 2 times : Damper closed (22 22 displayed) * 3 times : Forced defrost mode...
  • Page 68 10-2 TEMPERATRUE CHART - FRZ AND ICING SENSOR TEMP RESISTANCE VOLTAGE 73.29 ㏀ -39°F (-40°C) 4.09 V -30°F (-35°C) 53.63 ㏀ 3.84 V -21°F (-30°C) 39.66 ㏀ 3.55 V -13°F (-25°C) 29.62 ㏀ 3.23 V -4°F (-20°C) 22.33 ㏀ 2.89 V 5°F (-15°C) 16.99 ㏀...
  • Page 69 10-3 TEMPERATRUE CHART - REF AND DEF SENSOR TEMP RESISTANCE VOLTAGE -39°F (-40°C) 225.1 ㏀ 4.48 V -30°F (-35°C) 169.8 ㏀ 4.33 V 129.3 ㏀ -21°F (-30°C) 4.16 V -13°F (-25°C) 99.30 ㏀ 3.95 V 76.96 ㏀ -4°F (-20°C) 3.734 V 60.13 ㏀...
  • Page 70 10-4 How to check the Fan-Error (1) EBR650027** 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.

  • Page 71: Component Testing Information

    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.
  • Page 72 11-2 Sheath Heater Function Sheath heater is a part for defrost. All heating wire is connected to only one line. To check if the part is defective, check the resistance. How to Measure (1) (2) Set a ohmmeter connect to The 2 housing pin. Measure the 2 pin connected to Sheath Heater.
  • Page 73 11-3 Door Heater Assembly Function The heater is designed to prevent the door from sweating. How to Measure Standard Test Point Ressult 2.3 ~ 2.9 Ω (1) to (2) - 48 -...
  • Page 74 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.
  • Page 75 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 Test Points Result 9.9 ~ 12.1 Ω (1) to (2) - 50 -...
  • Page 76 11-6 AC Motor ASSEMBLY Function The motor in the door pushed the ice into the dispenser. How to < In-door Motor > < In-door Motor > Measure Separate the Separate the housing. housing. Measure the Measure the resistance between resistance between (1) and (2) (1) and (3) Check the resistance between connectors (In-door motor 1, 2) and...
  • Page 77 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 <...
  • Page 78 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.
  • Page 79 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 room) Standard Test Points Result 4 ~ 30 kΩ Red wire to Black wire - 54 -...

  • Page 80: Compressor Troubleshooting

    12. Compressor Troubleshooting PCB Check (Simplify) Protection Logic TEST 1 Mode A-inverter Con201 Time>30sec Power Off Power On PCB OK Disconnect & V≒200 Replace Driver PCB Test Button Check Voltage about 200V past 30second after turn on Test Mode Comp Ref.
  • Page 81 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. Step1. Open PCB Cover Step2. Check Driver PCB LED Lamp IPM Output check - Measure the voltage between the POWER and COMM pins of the connector as shown below.
  • Page 82 12-2 Check B B1. LED blinks once, then repeats (FCT0 Fault) 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.
  • Page 83 B3. LED blinks five times, then repeats (Locked Piston) 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.
  • Page 84 B5. LED blinks seven times, then repeats (IPM Fault) 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.
  • Page 85 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 Check Harness...
  • Page 86 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. →...
  • Page 87 Compressor Troubleshooting WARNING HIGH VOLTAGE Step 1) Open PWB cover Step 2) Check for blinking frequency of LED, PWB LED Lamp 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 - 62 -...
  • Page 88 LED operating condition Cause Service guideline 1. Please check, Whether connector of PCB Parts compressor is attached defect or rightly or not. after LED two - time repetiton (Stroke Trip) Compress power off 2. After the first action, Connector You check on normal miss operation of - off -...
  • Page 89 12-5 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY • Is the power cord unplugged from the outlet? • Plug into the outlet. No Cooling. • Check if the power switch is set to OFF. • Set the switch to ON. •...
  • Page 90 12-6 REFRIGERATION CYCLE ▼ Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE OF THE CAUSE REMARKS THE UNIT EVAPORATOR COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher than • Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard ambient to a leak.
  • Page 91 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 Partial None Pattern? Equalization Equalization Test Test Very Fast Very Slow Very Slow Very Fast Fast...
  • Page 92 13. ICEMAKER OPERATING METHOD AND TROUBLE SHOOTING 13-1 Icemaker’s Basic Operating Method Power On Power On Start Position • Adjusts Ice Tray to Start Position with power on. • Adjusts Ice Tray to Start Position with power on. • Waits until water becomes ice. Icemaking ※For cold air circulation, Ice tray will be Mode...
  • Page 93 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. ※ 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 Ice bin.
  • Page 94 13-3-2 Icemaker not making ice or not making enough ice (Icemaker Unit & 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 Ice-detecting sensor is working normally. Icemaker Unit Ice-detecting sensor Fill Key...
  • Page 95 STEP (Ice-detecting sensor Diagnosis) 2. Close the left door 1. Remove Ice bin from compartment 3. Wait for 3min. (Door switch pushed) 4. Freezer door stays open 5. Push the refrigerator button & lock button at the same time. If “ETY” is shown on the display after the procedure above, Ice-detecting sensor is normal. If “FULL”...

  • Page 96: Description Of Function & Circuit Of Micom

    14. DESCRIPTION OF FUNCTION & 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 0°F for freezer. You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button. 2.
  • Page 97 14-1-4 Filter condition display function 1. There is a replacement indicator light for the filter In initial Power On Blinking Classification cartridge on the dispenser. / Filter RESET 2. Water filter needs replacement once six months or of using water filter. Filter Status 3.
  • Page 98 14-1-7 CONTROL OF FREEZER FAN MOTOR 1. 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.
  • Page 99 14-1-12 Defrosting (removing frost) 1. Defrosting starts each time 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.
  • Page 100 EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS 503E 503D 207B 626A 624G 624C 503G 207B 409D 158A 271B 103B 103A 501F 207A 120A 406D 150A 150C 150B 150D 282G 271D 120B 500A 145A 145B 411A 410G 313A 262B 282F 406B 302B 400A...
  • Page 101 EXPLODED VIEW & REPLACEMENT PARTS LIST FREEZER PARTS CAUTION: Use the part number to order part, not the position nu mber. 133B 133B 145C 131A 136C 136B 133A 133B 132P 145F 237C 136A...
  • Page 102 REFRIGERATOR PARTS 141A CAUTION: Use the part number to order part, not the position number. 141C 141C 141A 141E 141E 141B 141B 141A 141A 141C 141C 141E 141E 141B 141B 141D 161C 161B 154A 151B 146A 151A 162B 161A 145D 162A...
  • Page 103 230A 241K 231B 233B 207D 235A 250W 241K 232A 281H 312F 241J 233A 402A 241B 241G 271E When”231A” is servied, It has to provide 312G “232D”together 241B 281B 241C 631A 212G 232D 232B 281H 312E 312B 231A 241A 241M 241F 241E 241C 243C...
  • Page 104 276A 276G 276F 275A 405A 276B 279A 279I 278D 279H 279J 402C 278C 501D 279B 279D 500C 281B 279E 281A 501A 279C...
  • Page 105 616G 617A 625A 623B 616J 623B 616J 627B 627A 619A...
  • Page 106 630J 630J 612A 630F 630B 600A 630C 611A 630A 630H 630D 606A 630E 630Q 630G...
  • Page 107 Jun.2014 Printed in China...

Table of Contents