Samsung RB31FEJNB Series Service Manual
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Samsung RB31FEJNB Series Service Manual

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BOTTOM MOUNTED FREEZER TYPE
BASIC MODEL :
RB31FERNCWW/EF
MODEL CODE :
RB31FEJNB**, RB31FERNB**,
RB31FEJNC**, RB31FERNC**,
RB31FWJND**, RB31FSJMD**,
RB31FSRMD**, RB31FEJMD**,
RB31FERMD**, RB29FEJNB**,
RB29FEJNC**, RB29FERNC**,
RB29FWJND**, RB29FWRND**,
RB29FSJMD**, RB29FSRMD**,
RB29FEJMD**, RB29FERMD**
REFRIGERATOR
REFRIGERATOR
BOTTOM MOUNTED FREEZER TYPE
BASIC MODEL : RB37J5349SL/EF
MODEL CODE : RB37A5*****
CONTENTS
2. PRODUCT SPECIFICATIONS .................. 6
4. TROUBLE SHOOTING ......................... 40
5. PCB/PBA DAIGRAM .......................... 80
6. WIRING DIAGRAM .............................. 91
7. BLOCK DIAGRAM .............................. 95
8. REFERENCE INFORMATION .............. 100
Table of Contents
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Summary of Contents for Samsung RB31FEJNB Series

  • Page 1: Table Of Contents

    REFRIGERATOR BOTTOM MOUNTED FREEZER TYPE BOTTOM MOUNTED FREEZER TYPE BASIC MODEL : RB31FERNCWW/EF BASIC MODEL : RB37J5349SL/EF MODEL CODE : RB37A5***** MODEL CODE : RB31FEJNB**, RB31FERNB**, RB31FEJNC**, RB31FERNC**, RB31FWJND**, RB31FSJMD**, RB31FSRMD**, RB31FEJMD**, RB31FERMD**, RB29FEJNB**, RB29FEJNC**, RB29FERNC**, RB29FWJND**, RB29FWRND**, RB29FSJMD**, RB29FSRMD**, RB29FEJMD**, RB29FERMD** REFRIGERATOR CONTENTS...
  • Page 2 The manufacturer or dealer cannot be responsible for the interpretation of this information. All rights reserved. This service guide may not be reproduced in whole or in part in any form without written permission from the SAMSUNG ELECTRONICS Company.

  • Page 3: Precautions (Safety Warnings)

    1. PRECAUTIONS (SAFETY WARNINGS) ● Upon electronic Control system repair/change, make sure the set unplugged. Be ware of electric shock. ● Use rated electronic Control equipment. Make sure to check out ModeL name, Rated voltage, Rated current, Operation Temp, etc. ●...
  • Page 4 1. PRECAUTIONS (SAFETY WARNINGS) Read all instructions before repairing the product and keep to the instructions in order to prevent danger or property damage. CAUTION/WARNING SYMBOLS DISPLAYED SYMBOLS means Prohibition”. Indicates that a Warning danger of death means Do not disassemble”. or serious injury exists.
  • Page 5 1. PRECAUTIONS (SAFETY WARNINGS) ※ Please ler users know following warnings & cautions in detail. Warning & Caution Do not allow users to store pharmaceutical Do not allow users to store narrow and lengthy Do not allow users to put bottles or kinds of bottles or foods in a small multi-purpose room.

  • Page 6: Product Specifications

    2. PRODUCT SPECIFICATIONS 2-1) Introduction of main function ····················· 7 2-2) Model Specification ························· 8 2-3) Electiric Part Specification ······················ 11 2-4) Dimension (mm) ··························· 15...

  • Page 7: 2-1) Introduction Of Main Function

    2. PRODUCT SPECIFICATIONS 2-1) Introduction of main function SAMSUNG refrigerator has the following characteristics. ● Characteristics Specification • This products protects the environment by using the R600a refrigerant and the Environment-friendly cyclopentane blowing agent fridge/freezer using R600a • Properties :ODP(Ozone Depletion Potential):0GWP : Lowest...

  • Page 8: 2-2) Model Specification

    2. PRODUCT SPECIFICATIONS 2-2) Model Specification Item SPECIFICATION RB37A**9** RB37A**5** RB37A**0** RB37A**1**(CIS) Models Total Refrigerator Capacity Freezer W (mm) D (mm) dimension 2010 2010 2010 2010 H (mm) Rated Voltage and Frequency 230V / 50HZ c-fan 12v,3w Motor Rated Consumption r-fan 12v, 2.2w Power...
  • Page 9 2. PRODUCT SPECIFICATIONS Item SPECIFICATION RB31FD***D RB29FD***D Models RB31F****B RB31F***C RB31F****D RB29F****B RB29F***C RB29F****D RB31FW***D RB29FW***D Total Refrigerator Capacity Freezer W (mm) D (mm) dimension H (mm) 1850 1780 Rated Voltage and Frequency 230V / 50HZ C-FAN 12V, 3W 12V, 3W Motor Rated Consumption Power...
  • Page 10 2. PRODUCT SPECIFICATIONS This operation instruction covers various models. The characteristics of your appliance may differ slightly from those NOTE described in this manual.

  • Page 11: 2-3) Electiric Part Specification

    2. PRODUCT SPECIFICATIONS 2-3) Electric Parts Specification Compon nents for Freezer Electric Components...
  • Page 12 2. PRODUCT SPECIFICATIONS Compon nents for Freezer Electric Components...
  • Page 13 2. PRODUCT SPECIFICATIONS Freezer Refrigerator Defrost Cycle Room Temperature Sensor Components Defrost Related Components...
  • Page 14 2. PRODUCT SPECIFICATIONS Freezer Refrigerator Defrost Cycle Room Temperature Sensor Components Defrost Related Components...

  • Page 15: 2-4) Dimension (Mm)

    2. PRODUCT SPECIFICATIONS 2-4) Dimensions (mm) RB37 2006 1971 1976...

  • Page 16: Disassembly & Reassembly

    3. DISASSEMBLY & REASSEMBLY 3-1) Precaution ······························ 17 3-2) Assy Door ····························· 18 3-3) Door Sub parts ··························· 20 3-4) Refrigerator Compartments ····················· 22 3-5) Freezer Compartments ······················· 23 3-6) Machine Compartment ······················· 29 3-7) Compressor ···························· 31 3-8) Reversing the Door swing ······················ 32...

  • Page 17: 3-1) Precaution

    3. DISASSEMBLY & REASSEMBLY 3-1) Precaution • Unplug the refrigerator before cleaning and making repairs. • Do not dissemble or repair the refrigerator by yourself. - You run risk of causing a fire, malfunction and/or personal injury. • Remove any foreign matter or dust from the power plug pins. - Otherwise there is a risk of fire.

  • Page 18: 3-2) Assy Door

    3. DISASSEMBLY & REASSEMBLY 3-2) Assy Door Removing the Refrigerator Door PART NAME FIGURE DESCRIPTION 1. Remove the Cover Wire(①), Cap Space Door(②), Cover Hinge(③) using a flathead screwdriver. Be careful of injury. 2. Remove hinge screws (③) by turning to counterclockwise, and take off the cover hinge (④) along the arrow.
  • Page 19 3. DISASSEMBLY & REASSEMBLY Removing the Freezer Door PART NAME FIGURE DESCRIPTION 1. After unscrewing and removing two bolts, disassemble the ASSY HINGE MID (⑥). Removing the Freezer Door 2. Remove the door by carefully lifting the door (⑦). Be careful not to scratch.

  • Page 20: 3-3) Door Sub Parts

    3. DISASSEMBLY & REASSEMBLY 3-3) Door Sub parts PART NAME FIGURE DESCRIPTION 1. Insert a flat-head screwdriver on the slot as Door Handle shown,and unlock the caps. (Bar/Easy handle) 2. Remove screws by turning to counterclockwise, and take off the Handle Assy by pulling out. The door gasket is a molded gasket set into a channel located in the door liner.
  • Page 21 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION Water Dispenser 1. Hold it at both sides as shown in the picture and (Frige Option remove it by liftiing it up. Item)

  • Page 22: 3-4) Refrigerator Compartments

    3. DISASSEMBLY & REASSEMBLY 3-4) Refrigerator Compartments PART NAME FIGURE DESCRIPTION These shelves allow the storage of larger items and pull out for easy access. Shelf 1. Lift it up and pull the shelf out to the front. Drawers are designed for storage of fruits, vegetables and deli items.

  • Page 23: 3-5) Freezer Compartments

    3. DISASSEMBLY & REASSEMBLY 3-5) Freezer Compartments PART NAME FIGURE DESCRIPTION Drawers are designed for storage of meat and dry foods. The drawers are located in the lower portion of the refrigerator. Plastic Drawer In Freezer 1. Pull out the drawer as far as it goes. 2.
  • Page 24 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 1. Remove all shelves, plastic drawer. 2. Remove 6 screws, side of refrigerator as shown 3. Open Cover conv multi by using tool and remove housing connector. Assy Cover Evap When disassembling, make sure the unit turned (RB37A5**9**/** off.
  • Page 25 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 1. Remove all shelves, plastic drawer. 2. Remove 7 screws, side of refrigerator as shown 3. Open Cover conv multi by using tool and remove housing connector. Assy Cover When disassembling, make sure the unit turned Multi off.
  • Page 26 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 1. Pull out all drawers. 2. Remove 3 screws. Evaporator 3. Pull out the Shelf Fre Upp as far as it goes. Cover In Freezer 4. Pull out the cover evap with 2 hands from bottom to top in order.
  • Page 27 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 1. Pull back the plate and remove 1 screw. 2. Disassemble the Cover Evap Front and Cover Evap REAR with flat-head screwdriver. Fan Motor In Freezer Be careful in disassembly. The Screw is covered by Plate Cover Evap Rear.
  • Page 28 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION Evaporator is located in the bottom of freezer to produce cold air driven across the evaporator Coils. 1. Take off the ductwork in Freezer. 2. Disconnect the wire connector. (Heater, thermal fuse and Thermistor.) 3.

  • Page 29: 3-6) Machine Compartment

    3. DISASSEMBLY & REASSEMBLY 3-6) Machine Compartment PART NAME FIGURE DESCRIPTION 1. Remove the Cover Comp. 2. Disconnect the Wire Connector. Motor Fan 3. After pulling the ASSY MOTOR FAN UNIT in the “A” direction and push it in the “B” direction. If it is hard to take it out, (1) insert a flat-head screwdriver (2) along the locking tabs located under the ASSY MOTOR FAN UNIT.
  • Page 30 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 1. Remove Cover Relay. Relay O/L 2. Remove the relay O/L with a flat-blade screwdriver. (Refer to the picture)

  • Page 31: 3-7) Compressor

    3. DISASSEMBLY & REASSEMBLY 3-7) COMPRESSOR PART NAME FIGURE DESCRIPTION 1. Cut off the LOKRING connecting the COMP and the CONDENSER with a Pipe Cutter. (Red-line marking points) 2. Cut off the LOKRING connecting the CONDENSER and the HOT PIPE with a Pipe Cutter.

  • Page 32: 3-8) Reversing The Door Swing

    3. DISASSEMBLY & REASSEMBLY 3-8) Reversing the Door swing Read these instructions completely and carefully • Before reversing the door,first of all,main power should be switched off.you should take out contents and accessories like door guard from the doors.Be careful not to drop the doors during dissembling or assembling. Warning 1.
  • Page 33 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 3. Remove the Cover Hinge to push a hook like below Pictures. - Lift up the red line section by pressing as shown in Figure #2. - As shown in Figure #4, insert a flat-head screwdriver and push it in the arrow direction.
  • Page 34 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 8. Remove the freezer door from the Bottom hinge by carefully lifting the door staright The door is heavy, be careful not to injure yourself when removing the door. Basic position 9. Remove the screw on the bottom right side of the Fridge and Freezer Door Switch Lever Auto Closer from the right to Position reversed...
  • Page 35 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 13. Switch the position of Bottom hinge and Leg. (Right -> Left) Assemble the Hinge Low after putting the Freezer Door in the middle hinge. • Disassemble the Guide auto close and the Shaft-hinge.
  • Page 36 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 16. Use 11 mm wrench to separate the Top hinge shaft. Flip the Top hinge and reattach the Top hinge shaft. The loosening power of HINGE SHAFT should be 30 Kg/cm or more. 17.
  • Page 37 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 20. Assemble the Cap Space Door on back side. 21. Insert the Cover Wire Door on the top of Fridge door and then push it to assemble completely. Check the wire position that should be located the back side of Cover Wire Door.
  • Page 38 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 24. Remove the Cap Handle and the Screws by Flat-Head (-) screwdriver. Remove the Cap by Flat-Head (-) screwdriver and assemble the Handle and Cap-Handle. Be careful the Scratch, when disassembling the Cap. Removing Refrigerator Door...
  • Page 39 3. DISASSEMBLY & REASSEMBLY PART NAME FIGURE DESCRIPTION 26. Detach the Fridge and Freezer gaskets and attach them after rotating 180°. Make sure the door gaskets are properly arranged. If not, there can be a noise or dew can be formed which Removing affects perfomance of the unit.

  • Page 40: Trouble Shooting

    4. TROUBLESHOOTING 4-1) Check-List before Trouble-Shooting 4-1-1) Test Function (Forced Operation / Forced Defrost) ········ 41 4-1-2) Self-Diagnosis Function ····················· 46 4-1-3) Load Status Display Function ··················· 49 4-1-4) Restoration of Previous Settings upon Instant Power Outage ··· 51 4-1-5) Demo Mode Function for Store Display ·············· 51 4-1-6) Option Setting Function ······················...

  • Page 41: 4-1) Check-List Before Trouble-Shooting

    4. TROUBLESHOOTING 4-1) Check-List before Trouble-Shooting 4-1-1) Test Function (Forced Operation / Forced Defrost) 1. When pressing the "Freezer" and the "Fridge" buttons on the PANEL PCB at the same time for more than 4 seconds, the PANEL DISPLAY will be on and off with an interval of 0.5 second for about 3 seconds.
  • Page 42 4. TROUBLESHOOTING 2) Test Mode Description 1. Forced Operation Function 1-1) When any button is pressed once during the Test Mode, it will enter the Forced Operation. When it starts the Forced Operation, the LED Lamps indicating the Fridge Temperatures (1℃, 2℃, 3℃, 5℃, 7℃) and the Freezer Temperatures (-23℃,-21℃,-19℃, -17℃,-15℃) will be on showing that it is on the Forced Operation.
  • Page 43 4. TROUBLESHOOTING 2) Test mode Description - Twin 1. Forced Operation Function 1 1-1) When any button is pressed once during the Test Mode, it will enter the Forced Operation. When it starts the Forced Operation, the LED Lamps indicating the Fridge Temperatures (1℃, 2℃, 3℃, 5℃, 7℃) and the Freezer Temperatures (-23℃,-21℃,-19℃, -17℃,-15℃) will be on showing that it is on the Forced Operation.
  • Page 44 4. TROUBLESHOOTING 3. Forced Operation Function 3 1-1) When it is on the Forced Operation 2 during the Test Mode, press any button once. Then, Forced Operation 2 will stop immediately and it will go into the Forced Operation 3. when it enters the Forced Operation 3, it indicates that it is on the Forced Operation 3 mode by turning on “7℃”...
  • Page 45 4. TROUBLESHOOTING 5. Forced FR-defrost 2-1) When it is on the Forced R-defrost during the Test Mode, press any button once. Then, Forced R-defrost will stop immediately and it will go into the Forced FR-Defrost. when it enters the Forced FR Defrost, it indicates that it is on the Forced FR-defrost mode by turning on “3℃”...

  • Page 46: 4-1-2) Self-Diagnosis Function

    4. TROUBLESHOOTING 4-1-2) Self-Diagnosis Function 1) Self-Diagnosis Function upon Initial Power-On 1-1) When the unit is plugged into the power, MICOM diagnoses the status of the temperature sensors in a few minutes. 1-2) If defective sensor is found after Self-Diagnosis, relevant Display LEDs will blink at an interval of 0.5 sec.
  • Page 47 4. TROUBLESHOOTING ※ Self-Diagnosis Check List ERROR CODE Defect Item Description (Temp Display) F-DEF ERROR Freezer Room Defrost Heater Error Freezer "-23℃" LED LAMP EXT - SENSOR External SENSOR Error Freezer "-21℃" LED LAMP F - SENSOR Freezer Room SENSOR Error Freezer "-19℃"...
  • Page 48 4. TROUBLESHOOTING ※ Self-Diagnosis Error Description Error Code Item Description Trouble Shooting Remove the MAIN PCB CN70 and CN77 connectors [ Freezer Defrost Heater ] from the MAIN PCB and read the continuity between Connector Slipped-Out or Open-Contact, Wire Cut or BROWN ↔...

  • Page 49: 4-1-3) Load Status Display Function

    4. TROUBLESHOOTING 4-1-3) Load Status Display Function 1) During the Normal Operation, press the Freezer + Fridge buttons for 7 seconds. Then, the "2℃,3℃ and 5℃" Fridge temperature LEDs and the "-17℃,-19℃ and -21℃" Freezer temperature LEDs on the Display Panel will blink at the interval of 0.5 seconds for 3 seconds. 2) At this time, release the Freezer + Fridge buttons and press the Fridge button (it sends out "Ding Dong"...
  • Page 50 4. TROUBLESHOOTING ※ Load Mode Check List Category Display LED Description COMP Freezer "-23℃" Indicator LED On LED On when Comp is running LED On when the Freezer Defrost F-Defrost HEATER Freezer "-21℃" Indicator LED On Heater is on LED On when the Fridge Damper is R-Damper Freezer "-19℃"...

  • Page 51: 4-1-4) Restoration Of Previous Settings Upon Instant Power Outage

    4. TROUBLESHOOTING 4-1-4) Restoration of Previous Settings upon Instant Power Outage 1) If the Display Panel is initialized by the instant power outage, it will cause customer inquiries. To prevent this, when the power is restored, the previous settings will be restored or reset based on the inside temperature of the Freezer Compartment.

  • Page 52: 4-1-6) Option Setting Function

    4. TROUBLESHOOTING 4-1-6) Option Setting Function 1) During the Normal Operation, press the Freezer + Fridge buttons for 4 seconds. Then, the entire Display Panel will blink at the interval of 0.5 seconds for 3 seconds. 2) At this time, release the Freezer + Fridge buttons and press the Fridge button (it sends out "Ding Dong" sound.) Then, it shifts to the Option Setting mode.
  • Page 53 4. TROUBLESHOOTING Option Mode & Button Operation Description ① ② ③ ④ ③ ① ② ④ ① Displays the selected Option Set Value ② Displays the selected Option # ③ OPTION SET VALUE INCREASE BY ONE DEGREE (Rotation Type) ④ OPTION # INCREASE BY ONE DEGREE (Rotation Type) ●...
  • Page 54 4. TROUBLESHOOTING ● When the Display Panel converts to the Option Setting mode, the entire Display except the Freezer and the Fridge Temperature LEDs as shown below Temp LED goes off. Freezer Temp Setting Fridge Temp Setting 1) For example, if you want to shift the standard temp of the Freezer compartment by -2℃, follow the steps below.

  • Page 55: 4-1-7) Option Table

    4. TROUBLESHOOTING 4-1-7) Option Table Note There are other option setting functions. But, it's got to do with the performance of the unit, not for repair purposes. So, they are not handled in this manual. (Except those described in this manual, do not change other values) 1) Freezer Temp Shift Table Setting Item Freezer Temp Shift...
  • Page 56 4. TROUBLESHOOTING 2) Fridge Temp Shift Table Setting Item Fridge Temp Shift Location : Fridge Temp Display Option Item Setting Value Fridge Option Value Temp Display Panel Set Value -0.5℃ -1.0℃ -1.5℃ -2.0℃ -2.5℃ -3.0℃ -3.5℃ +0.5℃ +1.0℃ +1.5℃ +2.0℃ +2.5℃...
  • Page 57 4. TROUBLESHOOTING 2) Fridge Temp Shift Table Setting Item Display Off Option Location : Fridge Temp Display Option Item Setting Value Fridge Option Value Temp Display Panel Set Value Display Off in 10 seconds after feeding the Key value Display On mode persists Display On mode persists...
  • Page 58 4. TROUBLESHOOTING 4-2) Troubleshooting Flow-Chart by Symptoms 4-2-1) Troubleshooting for Self-Diagnosis Errors ··············· 60 4-2-2) When the Freezer Fan does not operate (BLDC Motor) ········· 65 4-2-3) When the C-Fan does not operate (BLDC Motor) ············ 66 4-2-4) When Defrost does not work (F DEF Heater) ·············· 67 4-2-5) When the unit does not turn on (INVERTER PCB) ············...
  • Page 59 4. TROUBLESHOOTING 4-2) Troubleshooting Flow-Chart by Symptoms DATA1.Temp Table Conversion Table - Temperature/MICOM PORT Voltage/Resistance SENSOR CHIP : PX41C ℃ ℉ Voltage Ω ℃ ℉ Voltage Ω ℃ ℉ Voltage Ω 4.694 153319 3.107 16419 1.153 2997 -56.2 4.677 144794 24.8 3.057 15731...
  • Page 60 4. TROUBLESHOOTING 4-2-1) When Self-Diagnosis Error occurs - The Display Panel shows the Sensor Error and, when the unit is plugged in and there are sensor errors, the unit does not operate and LED related to the defective sensors keep blinking. - When sensor defects occur during the operation, the unit keeps working.
  • Page 61 4. TROUBLESHOOTING 2) When the EXT Sensor is defective ERROR CODE Start MAIN PCB SENSOR (CN31) is inserted properly? Connector contact defect / Reconnect DATA1. Temp Table EXT Sensor is normal? ** Sensor Resistance Reading Location ** Replace Temp Sensor Ambient : Between CN31 #1 and #2.
  • Page 62 4. TROUBLESHOOTING 3) When the F-Sensor is defective ERROR CODE Start MAIN PCB Connector CN30 is inserted properly? Connector contact defect / Reconnect ** Sensor Resistance Reading Location ** F Sensor is F : Between CN30 #3 and #7 normal? ** 0Ω...
  • Page 63 4. TROUBLESHOOTING 4) When the DEF-Sensor is defective ERROR CODE Start MAIN PCB Connector CN30 is inserted properly? Connector contact defect / Reconnect F-DEF Sensor is DATA1. Temp Table normal? Replace Temp Sensor ** Sensor Resistance Reading Location ** F-DEF : Between CN30 #4 and #7 ** 0Ω...
  • Page 64 4. TROUBLESHOOTING 5) When the Cool Select Zone sensor is defective (CSZ models only) ERROR CODE Start MAIN PCB Connector CN30 is inserted properly? Connector contact defect / DATA1. Temp Table Reconnect Cool Select Zone ** Sensor Resistance Reading Location ** Sensor is normal? CSZ : Between CN30 #2 and #7 ** 0Ω...

  • Page 65: 4-2-2) When The Freezer Fan Does Not Operate (Bldc Motor)

    4. TROUBLESHOOTING 4-2-2) When the Freezer Fan does not operate (BLDC Motor) - This refrigerator uses the BLDC Fan Motor. The BLDC Motor operates with DC 7~12V. - The F-Fan motor generally runs together with the compressor. ☞ When checking with the Self Diagnosis F FAN ERROR Start The Compressor is Off.
  • Page 66 4. TROUBLESHOOTING 4-2-3) When the refrigerator(R) FAN does not work (restricted to R-FAN applied models only) - This refrigerator uses BLDC FAN motor. BLDC motor operates by DC 7~12V. - Generally, under COMP ON condition, FAN motor operates together. ☞ Content to be displayed when checking the self-diagnosis function Start Is COMP OFF? Operate forced operation...
  • Page 67 4. TROUBLESHOOTING 4-2-4) When the C-Fan does not operate (Applies to Models with C-Fan) - This refrigerator uses the BLDC Fan Motor. The BLDC Motor operates with DC 7~12V. - The F-Fan motor generally runs together with the compressor. ☞ When checking with the Self Diagnosis Start The Compressor is Off.

  • Page 68: 4-2-4) When Defrost Does Not Work (F Def Heater)

    4. TROUBLESHOOTING 4-2-5) When Defrost does not work (F DEF Heater) - When there is a trouble in defrosting, select the Self-Diagnosis function before turning off the unit. And, check if there is any defect in the Defrost Heater. If not, plug out the unit and do the Trouble-Shooting. (Refer to the Self-Diagnosis function and check the details) ☞...
  • Page 69 4. TROUBLESHOOTING 4-2-6) When there is No Power (MAIN PBA) Start Caution - When checking the MAIN There is AC220~240V or PCB, refer to the Operation DC310~340V at the MAIN PCB descriptions and the Power Circuit. So, be cautious "Reference" section. when repairing the unit or The unit is plugged In? measuring values.

  • Page 70: 4-2-6) When There Is No Power (Inverter Pba) A

    4. TROUBLESHOOTING 4-2-7) When there is No Power (INVERTER PBA) A+++ Start Caution - When Checking the There is AC230V INVERTER PBA refer to the or DC310V at the INVERTER Operation descriptions and PBA Power Circuit. So, be "Reference" Section cautions When repairing the The unit is plugged In? unit or measuring values.

  • Page 71: 4-2-7) When The Compressor Is Not Working (Inverter Pba)

    4. TROUBLESHOOTING 4-2-8) When the Compressor is not working (INVERTER PBA) When the inverter PBA LED Start is ON, it indicates that the compressor does operate normally 10 minutes have passed since COMP was off Check in 10 minutes When Forced Refer to the TEST Operation mode is activated, Function in this manual...
  • Page 72 4. TROUBLESHOOTING 4-2-9) When the Compressor is not working (INVERTER PBA) A+++ When the inverter PBA LED Start is ON, it indicates that the compressor does operate normally 10 minutes have passed since COMP was off Check in 10 minutes When Forced Refer to the TEST Function in Operation mode is activated,...

  • Page 73: 4-2-9) When The Unit Keeps Alarming (Buzzer Sound)

    4. TROUBLESHOOTING 4-2-10) When the unit keeps alarming (Buzzer Sound) Reference 1. Fridge / Freezer Door Open Alarm : It sends out an alarm sound when it passes over 2 minutes after the door is open. And, when the door remains open, it will keeps alarming every minute. 2.
  • Page 74 4. TROUBLESHOOTING ③ No Buzzer Sound This model has a buzzer affixed on the MAIN PCB. If there is no buzzer sound upon button press, Forced Operation or Door Open, disconnect MAIN PCB and check if the buzzer is damaged or there is any defective soldering. (If it is not a soldering problem, it is recommended replacing MAIN PCB due to difficulties in repairing) ※...

  • Page 75: 4-2-10) When Panel Pcb Operates Abnormally

    4. TROUBLESHOOTING 4-2-11) When PANEL PCB operates abnormally ① When PANEL PCB does not light up or partially does Start The connector on - Display Assy Location the Display Panel is inserted 1. Internal Type : Top Table properly. 2. External Type : Fridge Door/Top Hinge Re-insert Connector, Correct the defective contact MAIN PCB Connector...

  • Page 76: 4-2-11) When The Room Lamp (Led) Does Not Light Up

    4. TROUBLESHOOTING 4-2-12) When the Room Lamp (LED) does not light up Start Door & MICOM State MICOM(#22) DOOR S/W Right and Left DOOR S/W works Close 0V(Low) normal (Open/Close) Open 5V(High) Check & Replace REED S/W & Magnet Ass'y MICOM State IC10 MICOM #43 Output Door (Fridge)

  • Page 77: 4-2-12) When Fridge Damper Does Not Work

    4. TROUBLESHOOTING 4-2-13) When Fridge Damper does not work Start DAMPER is under a working condition. Forced Operation, Temp Increased Damper operates with DOOR S/W closed. DAMPER is good Door & MICOM State Door MICOM (#22) DOOR S/W is good Close Replace DOOR S/W Open...

  • Page 78: 4-2-13) When Cool Select Zone Damper Does Not Work (Applies Only To Models With Csz)

    4. TROUBLESHOOTING 4-2-14) When Cool Select Zone Damper does not work (Applies only to models with CSZ) Start DAMPER is under a working condition. Forced Operation, Temp Increased CSZ temp satisfies the set temp. Check Wiring & PCB MAIN Shift Set Temp [Set lower than the current temp] MAIN PCB Connector CN75 is inserted normal...
  • Page 79 4. TROUBLESHOOTING 4-2-15) LED blinking frequency depending on protecting functions (Inverter PBA) If Failure Condition is detected during compressor is operating, immediately stop Compressor operating and stand by 5 minutes. During this 5 minutes, RPM command signal is not available. It means, even if available RPM command signal is applied to the compressor, it does not work and keep standing by.

  • Page 80: Pcb/Pba Daigram

    11. It controls the operation of the Fridge Damper and the Water S/W. the Cool Select Zone Damper. 6. MAIN → PANEL PCB Operation Control 12. Converting AC Power into DC (POWER SOURCE UNIT) This document can not be used without Samsung's authorization.
  • Page 81 4. BOOTSTRAP Charger : It is an independent power circuit for the driving of the IPM High-Phase IGBT. 5. Current Sensing Circuit : It detects the currents taken by the Shunt resistance and does the PWM DUTY control. 6. IPM (IGCM04G60HA) This document can not be used without Samsung's authorization.
  • Page 82 4. IPM : It is a Power Module which consists of HVIC(1), IGBT(6) and Diode(6) and drives the compressor with IGBT ON/OFF controlling at the Micom. 5. Current Sensing Circuit : It detects the currents taken by the Shunt resistance and does the PWM DUTY control. This document can not be used without Samsung's authorization.
  • Page 83 5. PCB/PBA DIAGRAM 5-4) Connector Layout & Description (Main Board) This document can not be used without Samsung's authorization.
  • Page 84 5. PCB/PBA DIAGRAM 5-5) Connector Layout & Description (Main Board) A+++ This document can not be used without Samsung's authorization.
  • Page 85 5. PCB/PBA DIAGRAM 5-6) Connector Layout & Description (Main board) TWIN COOLING This document can not be used without Samsung's authorization.
  • Page 86 5. PCB/PBA DIAGRAM 5-7) Connector Layout & Description (Inverter Board) This document can not be used without Samsung's authorization.
  • Page 87 5. PCB/PBA DIAGRAM 5-8) Connector Layout & Description (Inverter Board) A+++ This document can not be used without Samsung's authorization.
  • Page 88 5. PCB/PBA DIAGRAM 5-9) Connector Layout & Description (Inverter Board) 3050 2M A+++ This document can not be used without Samsung's authorization.
  • Page 89 5. PCB/PBA DIAGRAM 5-10) Connector Layout & Description (PBA Sub) This document can not be used without Samsung's authorization.
  • Page 90 5. PCB/PBA DIAGRAM 5-11) Connector Layout & Description (PBA Coil Filter) This document can not be used without Samsung's authorization.

  • Page 91: Wiring Diagram

    6. WIRING DIAGRAM 6-1) Wiring Diagram (A+, A++) This document can not be used without Samsung's authorization.
  • Page 92 6. WIRING DIAGRAM 6-2) Wiring Diagram (A+++) This document can not be used without Samsung's authorization.
  • Page 93 6. WIRING DIAGRAM 6-3) 3050-2M A+++ This document can not be used without Samsung's authorization.
  • Page 94 6. WIRING DIAGRAM 6-4) 3050-2M A++ This document can not be used without Samsung's authorization.

  • Page 95: Block Diagram

    7. BLOCK DIAGRAM 7-1) PBA Main This document can not be used without Samsung's authorization.
  • Page 96 7. BLOCK DIAGRAM 7-2) PBA Main A+++ This document can not be used without Samsung's authorization.
  • Page 97 7. BLOCK DIAGRAM 7-3) PBA Inverter This document can not be used without Samsung's authorization.
  • Page 98 7. BLOCK DIAGRAM 7-4) PBA Inverter A+++ This document can not be used without Samsung's authorization.
  • Page 99 7. BLOCK DIAGRAM 7-5) Nomenclatrue...

  • Page 100: Reference Information

    8. REFERENCE INFORMATION...
  • Page 101 • China : http;//china.samsungportal.com • Asia : http;//asia.samsungportal.com • Mideast & Africa : http;//mea.samsungportal.com) - This Service Manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable International or domestic law. - ©...

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