Samsung RF28HMEDBSR Service Manual
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Samsung RF28HMEDBSR Service Manual

French door refrigerator
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REFRIGERATOR
RF28**/RF25**
REFRIGERATOR
FRENCH DOOR REFRIGERATOR
MODEL NAME : RF28HMEDBSR
MODEL CODE : RF28HMEDBSR/AA
CONTENTS
1. PRECAUTIONS(SAFETY WARNINGS) ·······5
2. PRODUCT SPECIFICATIONS ······················9
3. DISASSEMBLY AND REASSEMBLY ·········27
4. TROUBLESHOOTING ································59
5. PCB DIAGRAM ·········································102
6. WIRING DIAGRAM ···································107
7. BLOCK DIAGRAM ····································108
8. MODEL CODE TABLE ······························ 110
RF28HMEDBBC
RF28HMEDBWW
RF25HMEDBSR
RF25HMEDBBC
RF25HMEDBWW
RF28HMEDBBC/AA
RF28HMEDBWW/AA
RF25HMEDBSR/AA
RF25HMEDBBC/AA
RF25HMEDBWW/AA

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Summary of Contents for Samsung RF28HMEDBSR

  • Page 1 REFRIGERATOR FRENCH DOOR REFRIGERATOR MODEL NAME : RF28HMEDBSR RF28HMEDBBC RF28HMEDBWW RF25HMEDBSR RF25HMEDBBC RF25HMEDBWW MODEL CODE : RF28HMEDBSR/AA RF28HMEDBBC/AA RF28HMEDBWW/AA RF25HMEDBSR/AA RF25HMEDBBC/AA RF25HMEDBWW/AA REFRIGERATOR CONTENTS 1. PRECAUTIONS(SAFETY WARNINGS) ·······5 2. PRODUCT SPECIFICATIONS ······················9 3. DISASSEMBLY AND REASSEMBLY ·········27 4. TROUBLESHOOTING ································59 5.
  • Page 2 Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or dealer cannot be responsible for the interpretation of this information. SAMSUNG ELECTRONICS AMERICA, INC. Technical Service Guide Copyright ©2010 All rights reserved.

  • Page 3: Table Of Contents

    Contents 1. Precautions(Safety Warnings) ..............5 2. Product Specifications ................9 2-1) Introduction of Main Function ..................10 2-2) Specifications ........................12 2-3) Interior Views ........................13 2-4) Model Specification &Specification Chart ..............14 2-5) Dimensions of Refrigerator (Inches) ................17 2-6) Optional Material Specification ..................19 2-7) Refrigerant Route in Refrigeration cycle ..............20 2-7-1.
  • Page 4 Contents 3-29) Comp Cooling Fan .......................55 3-30) Comp Cooling Fan Motor....................56 3-31) Machine Compartment ....................57 3-32) Electric Box ........................57 3-33) Cover-Unit ........................58 4. TROUBLESHOOTING ................59 4-1) Function for failure diagnosis ..................60 4-2) Diagnostic method according to the trouble symptom(Flow Chart) ......74 5.

  • Page 5: Precautions(Safety Warnings)

    1. Precautions(Safety Warnings) ● Unplug the appliance before the changing or repairing the electric parts. ➝ Be careful the electric shock. ● When exchanging the parts, use the correct parts. ➝ Check the model name, rating voltage, rating current, running temperature symbols.
  • Page 6 Precautions(Safety Warnings) Read all instructions before repairing the product and follow the instructions in order to prevent danger or property damage. Plug out and remove all the items in regrigerator prior to repair. CAUTION/WARNING SYMBOLS DISPLAYED SYMBOLS means “Prohibited”. Indicates that a Warning danger of death means “Do not disassemble”.
  • Page 7 Precautions(Safety Warnings) ❈ Please let users know following warnings & cautions in detail. Warning & Caution Do not allow users to store Do not allow users to store narrow Do not allow users to put bottles or and lengthy bottles or foods in a pharmaceutical products, scientific kinds of glass in the freezer.
  • Page 8 Precautions(Safety Warnings) FLOORING For proper installation, this refrigerator must be placed on a level surface of hard material that is the same height as the rest of the flooring. This surface should be strong enough to support a fully loaded refrigerator, or approximately 660lbs(299kg).

  • Page 9: Product Specifications

    2. Product Specifications 2-1) Introduction of Main Function ··························································································································· 11 2-2) Specifications ··················································································································································· 13 2-3) Interior Views ··················································································································································· 14 2-4) Model Specification &Specification Chart ········································································································ 15 2-5) Dimensions of Refrigerator (Inches) ················································································································ 18 2-5) Dimensions of Refrigerator (Inches) ················································································································ 19 2-6) Optional Material Specification·························································································································...

  • Page 10: 2-1) Introduction Of Main Function

    Product Specifications 2-1) Introduction of Main Function A newly developed SAMSUNG French door refrigerator in 2014 has the following characteristics. Surround Multi Flow • Uniform cooling for each shelf and even in corner in fresh food compartment by centerpositioned fan and duct with multiple flow effluences.
  • Page 11 Product Specifications ▶ Changing Items Item Details New Model Ez-Open The freezer door and Mid drawer (Flex zone) Handle System open and close easily. Emotional The lighting helps you find groceries Easier by Lighting lighting down when you open Mid drawer(Flex zone) and freezer door.

  • Page 12: 2-2) Specifications

    Product Specifications 2-2) Specifications ELECTRICAL SPECIFICATIONS REFRIGERATOR Defrost Control From 12 to 22 hrs(comp.run time) Thermo Bimetal Protector 140°F(60°C)(off) 104°F(40°C)(on) F: 50°F(10°C)(off) Defrost Thermistor(502AT) R: 59°F(15°C )(off) Electrical RatingAC115V 60Hz 11.6 Amps Maximum Current Leakage 0.25 mA Maximum Ground Path 0.1 Ohm Resistance Energy Consumption...

  • Page 13: 2-3) Interior Views

    Product Specifications 2-3) Interior Views Light FF Ice-Maker Foldable-Shelf Slide-Shelf Fixed-Shelf Quick-Space Glass Shelf Vertical Hinged Section Vegetable & Fruit Drawers Water Filter Door Bins Light Convertible Room Auto Pull Out Guard Drawer Freezer Drawer...

  • Page 14: 2-4) Model Specification &Specification Chart

    Product Specifications 2-4) Model Specification &Specification Chart RF28HM* RF25HM* ITEM Model Ice & Water Dispenser 35 6/8 Inch (908mm) 32 3/4 Inch (830mm) On Cabinet 29 1/2 Inch (751mm) 30 Inch (765mm) W/O Handle 34 Inch (864mm) 34 Inch (863mm) External size With Handle 36 1/2 Inch (926mm)
  • Page 15 Product Specifications Items Specification Model RF28HM* RF25HM* Model MKV190C-L2B Compressor Starting type BLDC Oil Charge FREOL α - 15c Freezer SPLIT FIN TYPE Evaporator Refrigerator SPLIT FIN TYPE Condenser Forced and Natural Convection Type Dryer Molecular shieve XH-9 R : 0.032” x 118” (0.82mm x 3500mm) / F : 0.032” x Capillary tube(Dia x Length) 118”...
  • Page 16 Product Specifications Items Specification Model RF28HM* RF25HM* Defrost Heater(FRE) Heated at F Defrost AC 120V, 230W Defrost Heater(REF) Heated at R Defrost AC120V, 120W Heater-Ice Maker F/S : AC 120V, 141W Interlock with French AC 120V, 2.5W DISPENSER Heater Heater AC 120V, 10W FRENCH Heater DC12V, 2.3W...

  • Page 17: 2-5) Dimensions Of Refrigerator (Inches)

    Product Specifications 2-5) Dimensions of Refrigerator (Inches) Model : RF28HM* 35 6/8" (908mm) 4" (102mm) 36 1/2" (926mm) 1 1/4" (30.6mm) 34" (864mm) 1/2" (13mm) 2" (51mm)

  • Page 18: 2-5) Dimensions Of Refrigerator (Inches)

    Product Specifications Model : RF25HM* 32 3/4” (830mm) 3 3/8" (87mm) 36 1/2" (925mm) 1 3/16" (29.6mm) 34" (863mm) 7/16" (11mm) 2 3/8" (59.5mm)

  • Page 19: 2-6) Optional Material Specification

    Product Specifications 2-6) Optional Material Specification Part Name Part Code AMOUNT ASSY- DA99-03490L PACKING SUB LED LAMP REF DA97-12606A LED LAMP CASE-VEG R, L DA41-00519S LED LAMP FRE DA41-00676G LED LAMP MID DA41-00676G LED LAMP REF(SIDE) DA41-00519Q...

  • Page 20: 2-7) Refrigerant Route In Refrigeration Cycle

    Product Specifications 2-7) Refrigerant Route in Refrigeration cycle Compressor → Condenser → Hot Pipe → Back Cluster Pipe → Dryer → Capillary Tube → Refrigerator Evaporator → Pipe Direct Ice → Freezer Evaporator → Suction Pipe → Compressor...

  • Page 21: Principle Of Freezeer

    Product Specifications 2-7-1. PRINCIPLE OF FREEZEER...

  • Page 22: Operation Theory Of Refrigeration Cycle Components

    Product Specifications 2-7-2. Operation theory of refrigeration cycle components ■ Condenser 1) Role: A device which radiates heat to the outside (water/air) to make liquid state for the high temperature / high pressure gas refrigerant discharged from compressor 2) Types A.

  • Page 23: Operation Theory Of Refrigeration Cycle Components

    Product Specifications ■ Evaporator 1. Role: As the low pressure liquid refrigerant flowed from capillary absorbs heat inside of the refrigerator, it becomes low pressure gas and refrigerate the foods. 2. Theory: The low pressure refrigerant flowed to evaporator operates cooling which takes ambient evaporated potential heat with maintaining the evaporation up to evaporate completely.

  • Page 24: Operation Theory Of Refrigeration Cycle Components

    Product Specifications ※.Influence of moisture ① Moisture precipitation – Blocked by ice ② Refrigerant and reaction ③ Life reduction of oil ④ Acceleration of oxidization ⑤ Copper plating phenomenon ⑥ Gas dissolution by the interaction of synthetic insulating material (insulator) ※.Influence of foreign substance ① Increase of condensed temperature. ② Increase of temperature.

  • Page 25: Refrigeration Cycle Type

    Product Specifications 2-7-3. Refrigeration Cycle Type HM Cycle Compressor Condenser Hot Pipe Back Cluster Pipe Dryer Capillary Tube Refrigerator Evaporator ICE Pipe Freezer Evaporator Suction Pipe Compressor...

  • Page 26: 2-8) Cooling Air Circulation

    Product Specifications 2-8) Cooling Air Circulation Refrigerator Flex Zone Freezer...

  • Page 27: Disassembly And Reassembly

    3. Disassembly and Reassembly 3-1) PRECAUTION ························································································································································· 29 3-2) Refrigerator Door ···················································································································································· 30 3-3) Door Handle Refrigerator ········································································································································ 32 3-4) Door Handle Freezer & Flex zone··························································································································· 33 3-5) Refrigerator Light ···················································································································································· 34 3-6) Cover-Display & Water-Dispenser ·························································································································· 34 3-6) Cover-Display & Water-Dispenser ·························································································································· 35 3-7) Water-Dispenser (RF25HM**) ·································································································································...

  • Page 28: 3-1) Precaution

    Disassembly and Reassembly 3-1) PRECAUTION • Unplug the refrigerator before cleaning and making repairs. • Remove any foreign matter or dust from the power plug pins. - Otherwise there is a risk of fire. • Do not use a cord that shows cracks or abrasion damage along its length or at either end. •...

  • Page 29: 3-2) Refrigerator Door

    Disassembly and Reassembly 3-2) Refrigerator Door Part Name How To Do Descriptive Picture 1. Remove the 3 screws holding down the Top Table and remove the Top  Table ()  2. Disconnect the electrical () above the upper left door hinge To disconnect the connector () more easily, press the end of the hook () and pull connector.
  • Page 30 Disassembly and Reassembly Part Name How To Do Descriptive Picture 5. Lift the door straightly up to remove. Be careful not to drop the door. CAUTION Refrigerator Door 6. Lift the grommet hinge straightly up to remove. 7. With a Philips head screwdriver, remove the screw () attatched to ...

  • Page 31: 3-3) Door Handle Refrigerator

    Disassembly and Reassembly 3-3) Door Handle Refrigerator Part Name How To Do Descriptive Picture 1. Loose Set Screw with 0.1in Hex wrench and pull front the handle. Door Handle Fridge 2. Remove the cover vinyl of door.

  • Page 32: 3-4) Door Handle Freezer & Flex Zone

    Disassembly and Reassembly 3-4) Door Handle Freezer & Flex zone Part Name How To Do Descriptive Picture 1. Loosen the Set Screw situated at the bottom right of the appliance about 0.1in by using Hex wrench. Door Handle Freezer 2. Pull the Set handle out by moving it to the right side.

  • Page 33: 3-5) Refrigerator Light

    Disassembly and Reassembly 3-5) Refrigerator Light Part Name How To Do Descriptive Picture 1. Press the tabs on the back of the Lamp Cover and take it off. Refrigerator Light 2. Remove the 2 screws And separate the LED panel. 3-6) Cover-Display &...

  • Page 34: 3-7) Water-Dispenser (Rf25Hm**)

    Disassembly and Reassembly Part Name How To Do Descriptive Picture 3. Disengage the housing connect of Cover-Display display cover. 3-7) Water-Dispenser (RF25HM**) Part Name How To Do Descriptive Picture 1. Disengage the Housing Connectors by pushing a flat-blade screwdriver. 2. Remove 2 screws of the Case Ice Water-Dispenser Route Assy.

  • Page 35: 3-7) Water-Dispenser (Rf25Hm**)

    Disassembly and Reassembly Part Name How To Do Descriptive Picture hose 1. Assembly shall be in order from the disassembly. Case-Ice and Route shall be assembled inside of hose. Otherwise, assemble cannot be accomplished. Water-Dispenser HOSE HOSE 2. When assembling Cover-Display, ...

  • Page 36: 3-8) Water-Dispenser (Rf28Hm**)

    Disassembly and Reassembly 3-8) Water-Dispenser (RF28HM**) Part Name How To Do Descriptive Picture 1. Disengage the Housing Connector by pushing a flat-blade screwdriver. 2. Remove 2 screws of the Case Ice Route Assy. Water-Dispenser 3. Pull the Case Ice Route Assy. (Ice/Water model ) 4.

  • Page 37: 3-9) Glass Shelf

    Disassembly and Reassembly 3-9) Glass Shelf Part Name How To Do Descriptive Picture Remove the shelf by lifting the front Glass Shelf part of the shelf up and pulling it out.

  • Page 38: 3-10) Foldable Glass Shelf

    Disassembly and Reassembly 3-10) Foldable Glass Shelf Part Name How To Do Descriptive Picture 1. Remove the Cap. Foldable Glass 2. Remove 2 screws of the Folderble Shelf Glass Shelf. 3-11) Vegetable & Fruit Drawers Shelf Part Name How To Do Descriptive Picture 1.

  • Page 39: 3-12) Case Water Filter

    Disassembly and Reassembly 3-12) Case Water Filter Part Name How To Do Descriptive Picture To disassemble the Case Water Filter, remove the water filter and all drawers and shelves. 1. Remove the 3 screws holding down the Top Table and remove the Top Table ().

  • Page 40: 3-13) Water Tank

    Disassembly and Reassembly Part Name How To Do Descriptive Picture 5. Disconnect the 2 Housing  connectors (). Case Water Filter 6. Lift and pull the Case Water Filter out. 3-13) Water Tank Part Name How To Do Descriptive Picture ...
  • Page 41 Disassembly and Reassembly Part Name How To Do Descriptive Picture b. Lose the hooks by pushing the flat-blade driver. 3. Cut the sponge stick on the Case Water tank. and divide Case Water Tank.  Water Tank 4. Remove the tube clips() and disconnect the water tank hoses by pulling the fitting tube.

  • Page 42: 3-14) Motor Damper

    Disassembly and Reassembly 3-14) Motor Damper Part Name How To Do Descriptive Picture 1. Remove the 2 screws under the. water filter case and take off the cover damper(②). Motor Damper 2. Disengage 2 housing connector. 3. Take off the Motor Damper by pulling a flat-blade screwdriver .

  • Page 43: 3-15) Water Filter (Assembly & Disassembly)

    Disassembly and Reassembly 3-15) Water Filter (Assembly & Disassembly) Part Name How To Do Descriptive Picture 1. Turn the water filter count- clockwise. (Refer to the picture) 2. Remove the water filter by pulling it. (Refer to the picture) Water Filter 3.

  • Page 44: 3-16) Vertical Hinged Section

    Disassembly and Reassembly 3-16) Vertical Hinged Section Part Name How To Do Descriptive Picture 1. Remove 2 screw cap parts with a flat-blade(-) screwdriver. (Refer to the picture) Be careful not to scratch or break the parts CAUTION 2. Unscrew 2 screws. Vertical Hinged Section 3.

  • Page 45: 3-17) Evaporator Cover In Refrigerator

    Disassembly and Reassembly 3-17) Evaporator Cover In Refrigerator Part Name How To Do Descriptive Picture 1. Remove the angle cap with a flat- blade screwdriver. (Refer to the picture) Be careful not to scratch or break the parts CAUTION 2. Unscrew 4 screws. ...

  • Page 46: 3-18) Evaporator In Refrigerator

    Disassembly and Reassembly 3-18) Evaporator In Refrigerator Part Name How To Do Descriptive Picture  1. Remove the the housing cover by pushing both lateral sides of the housing cover () and pulling it out.  (Refer to the picture) <...

  • Page 47: 3-19) Freezer Door

    Disassembly and Reassembly 3-19) Freezer Door Part Name How To Do Descriptive Picture 1. Pull out the Pull Out Drawer by maximum. 2. After lifting the Pull Out Drawer up holding both sides, remove it at the rail system. 3. After lifting the Freezer Guard up holding both sides, remove it at the rail system.

  • Page 48: 3-20) Convertible Door

    Disassembly and Reassembly 3-20) Convertible Door Part Name How To Do Descriptive Picture 1. Pull the and remove the convertible room (②) by pulling it to your body with both hands. open to full extension. 2. Remove the cover housing (②) by a flat-blade screwdriver.

  • Page 49: 3-21) Flex Zone Door

    Disassembly and Reassembly 3-21) Flex Zone Door Part Name How To Do Descriptive Picture 6. Remove the shaft gear() by pull the pin() out.   Mid drawer 7. Remove the screw and pull out The  rail.

  • Page 50: 3-22) Ice-Maker

    Disassembly and Reassembly 3-22) Ice-Maker Part Name How To Do Descriptive Picture 1. When pressing the Energy-Saver and the Fridge buttons on the Display together for 8 seconds at the same time, it will convert to the Test Mode and the entire Display function will be off.
  • Page 51 Disassembly and Reassembly Part Name How To Do Descriptive Picture 7. Remove the screw from the Duct Tray-ice. 8. With a flat blade screwdriver, push the duct to the right and remove it from the locking tab. (Refer to the image.) 9.

  • Page 52: 3-23) Flex Zone Light

    Disassembly and Reassembly 3-23) Flex Zone Light Part Name How To Do Descriptive Picture 1. Remove the cover Flex zone lamp () by a flat-blade screwdriver. Flex Zone Light 2. Disengage the housing. 3-24) Freezer Light Part Name How To Do Descriptive Picture 1.

  • Page 53: 3-25) Side Light

    Disassembly and Reassembly 3-25) Side Light Part Name How To Do Descriptive Picture 1. Remove the cover Side lamp(③) by a flat-blade screwdriver. 2. Separate the Side lamp from the Refrigerator Light case. 3. Disengage the housing. 3-26) Door Switch In Freezer Part Name How To Do Descriptive Picture...

  • Page 54: 3-27) Evaporator Cover In Freezer

    Disassembly and Reassembly 3-27) Evaporator Cover In Freezer Part Name How To Do Descriptive Picture 1. Remove the freezer door and freezer drawer by pulling out the drawer and then unscrewing 2 screws. Evaporator Cover In 2. Lift up the evaporator cover. Freezer 3.

  • Page 55: 3-29) Comp Cooling Fan

    Disassembly and Reassembly 3-29) Comp Cooling Fan Part Name How To Do Descriptive Picture 1. Unscrew 5 screws of COVER COMP. Be careful not to damage from the inner hole of cover comp. CAUTION 2. Remove the DRAIN HOSE. 3. Remove 1 screw. 4.

  • Page 56: 3-30) Comp Cooling Fan Motor

    Disassembly and Reassembly 3-30) Comp Cooling Fan Motor Part Name How To Do Descriptive Picture 1. Remove the screw with a flat blade screwdriver. 2. Remove the motor fan by pulling the fan out while graping the motor part. Comp Cooling Fan 3.

  • Page 57: 3-31) Machine Compartment

    Disassembly and Reassembly 3-31) Machine Compartment Part Name How To Do Descriptive Picture 1. Disengage the housing connector. 2. Remove Cover Relay. Relay O/L 3. Remove the relay O/L with a flat- blade screwdriver. (Refer to the picture) 3-32) Electric Box Part Name How To Do Descriptive Picture...

  • Page 58: 3-33) Cover-Unit

    Disassembly and Reassembly 3-29) Cover-Unit 3-33) Cover-Unit Part Name How To Do Descriptive Picture Supplies : A general hexagonal wrench ( Thickness is under 6mm ) 1. Check the hook on the mark of Cover-Unit “△”. 2. Inset the wrench to the side of hook on the mark of “△”...

  • Page 59: Troubleshooting

    4. TROUBLESHOOTING 4-1) Function for failure diagnosis ······················································································································61 4-2) Diagnostic method according to the trouble symptom(Flow Chart) ····························································75...

  • Page 60: 4-1) Function For Failure Diagnosis

    TROUBLESHOOTING 4-1) Function for failure diagnosis 4-1-1. Test mode (manual operation / manual defrost function) • If Freezer Key + Lighting Key on the front of panel are pressed simultaneously for 8 seconds , it will be changed to the test mode and all displays on the front of panel will be off. •...

  • Page 61: Display Function Of Communication Error

    TROUBLESHOOTING 2) Forced Defrost 2-1) When you press any key one more time at Fridge off Forced Operation [OF r], rd lights up on the Display Panel. At this time, the Forcd Operation stops immediately and R-Defrost will be performed at the same time.
  • Page 62 TROUBLESHOOTING 4-1-3. Self-diagnostic function 1) Self-diagnostic function in the Initial power ON 1-1) Micom operates self-diagnostic function to check the temperature sensor condition within 1 second when the refrigerator turned On initially. 1-2) If bad sensor is detected by the self-diagnostic function, the applicable display LED will blink for 0.5 sec. At this moment, there is no beep sound.(Refer to self-diagnostic CHECK LIST) 1-3) Self-diagnostic button is recognized only when the error is displayed by the bad sensor.
  • Page 63 TROUBLESHOOTING ※ R Self-diagnostics check list Item Trouble contents Diagnostic method The voltage of MAIN PCB CN30- “3” N76-”1”: FZ-Sensor Error shall be between 4.5V~1.0V The voltage of MAIN PCB CN30- “6” N76-”1”: FF-Sensor Error shall be between 4.5V~1.0V Display error : separation of sensor F Z - D E F - S e n s o r The voltage of MAIN PCB CN30- “5”...
  • Page 64 TROUBLESHOOTING ※ R Self-diagnostics check list Item Trouble contents Diagnostic method After separating MAIN PCB CN77 wire from Display error when open error is detected PCB, resistance value between Black ↔ Brown Flex Zone-Damper- by damper heater : separation of Damper wire shall be 135 ohm±...

  • Page 65: Display Function Of Load Condition

    TROUBLESHOOTING 4-1-4. Display function of Load condition ① ① ② ① If Freezer Key + Fridge Key are pressed simultaneously for 6 seconds, ALL ON/OFF will blink with 0.5interval for 2 seconds. ② If take the finger off from above keys and press Lighting, load condition mode will be started. 1) If Freezer Key + Fridge Key are pressed simultaneously for 6 seconds during normal operation, the temperature setting display of fresh food and freezer compartments will blink ALL ON/OFF with 0.5 for 2 seconds.
  • Page 66 TROUBLESHOOTING ※ Load mode Check list Display LED Display contents Operation contents When FF compartment FAN operates with high R-1-ⓐ R-FAN High speed, applicable LED Blink When FF compartment FAN operates with low R-1-ⓑ R-FAN Low speed, applicable LED Blink When FF compartment defrost heater operates, R-1-ⓒ...
  • Page 67 TROUBLESHOOTING 4-1-5. Cooling OFF mode setting function ① ① ① ① If Freezer Key + Fridge Key + Alarm Key are pressed for 5 seconds, Cooling Off mode will be started. 1) If Freezer Key + Fridge Key + Alarm Key are pressed simultaneously for 5 seconds during normal operation, Cooling Off mode will be started with buzzer sound(ding-dong).

  • Page 68: Option Setting Function

    TROUBLESHOOTING 4-1-6. Option setting function • If Alarm Key + Fridge Key are pressed simultaneously for 12 seconds during normal operation, fresh food and freezer compartments temperature display will be changed to option setting mode. KEY operation method for changing to option mode ①...
  • Page 69 TROUBLESHOOTING Code Reference Value 1) For example, if you want to change freezer compartment standard temperature to -4℉(-2°C) by operating option, do as below. This function is for changing the standard temperature. In -2℉(-19°C) of current temperature of freezer compartment, if you make the temperature lower to -4℉ (-2°C) by the option, the standard temperature would be controlled -6℉(-21°C) Therefore, if you change the setting of temperature option to -2℉(-19°C) on the panel, the appliance will be operated with -6℉(-21°C).

  • Page 70: Option Table

    TROUBLESHOOTING 4-1-7. Option TABLE 1) Temperature changing table of freezer compartment Freezer Temp Shift Set item Fridge Room 7-SEG Reference Value Setting value Temp. Code Reference Value compartment compensation Code 0℉(0.0℃) -1℉(-0.5℃) -2℉(-1.0℃) -3℉(-1.5℃) -4℉(-2.0℃) -5℉(-2.5℃) -6℉(-3.0℃) -7℉(-3.5℃) +1℉(+0.5℃) Code Reference Value +2℉(+1.0℃) +3℉(+1.5℃)
  • Page 71 TROUBLESHOOTING 3) Operation rate changing table of dispenser heater Dispenser Heater Rate Set item Reference Fridge Room 7-SEG Value Setting value Rate change compartment Code +0.0% + 20% operation ( up to 100% ) Code Reference Value ex) If you want to change the dispenser heater operation rate to +20% 4) Temperature changing table of Pantry/Mid Drawer Room Code...
  • Page 72 TROUBLESHOOTING Code Reference Value 5) Amount of water supply to ice tray Set item Amount of Water Supply Reference Fridge Room 7-SEG Value Code Reference Value Setting value Amount of water compartment supply Code setting value Setting value + 10cc Code Reference Value Code...
  • Page 73 Code Reference Value Code Reference Value TROUBLESHOOTING 7) Temperature changing table of ice room Code Reference Value Set item Ice Room Temp Shift Reference Fridge Room 7-SEG Value Code Reference Value Setting value Temp. compartment compensation Code 0℉(0.0℃) -1℉(-0.5℃) Code Reference Value -2℉(-1.0℃) -3℉(-1.5℃)

  • Page 74: 4-2) Diagnostic Method According To The Trouble Symptom(Flow Chart)

    TROUBLESHOOTING 4-2) Diagnostic method according to the trouble symptom(Flow Chart) DATA1.Temperature table Resistance value and MICOM port voltage of sensor according to the temperature SENSOR CHIP : based on PX41C, PX41C, 502AT/ 103**(ICE MAKER SENSOR(MOLD)/FULL UP, 20Kohm ( Actual measurement = value of the table below X 2 ) Voltage Resi s tance Voltage Resi s tance Voltage Resi s tance...
  • Page 75 TROUBLESHOOTING DATA2. Humidity Sensor table - Voltage output table @23°…, 5Vdc --- HTG3515CH/HTG3535CH RH(Temperature compensate ) = RH (Relative Humidity ) + ( Temp(°C) °© 23°C) x 0.05 Voltage Resi s tance Voltage Resi s tance Voltage Resi s tance ℃...
  • Page 76 TROUBLESHOOTING 4-2-1. If the trouble is detected by self-diagnosis - The error of sensor will be displayed on the front of display. when the error of sensor is detected at initial power ON, the appliance will not operated and display of abnormal sensor part will blink.
  • Page 77 TROUBLESHOOTING 2) If R Sensor has trouble ERROR Code Start Is MAIN PCB DATA1. Connector CN30 and CN76 inserted Temperature table correctly? Bad contact of connector/ insert correctly ** Measuring point of resistance value according to Sensor ** Is R Sensor R : CN30 - “6”...
  • Page 78 TROUBLESHOOTING 3) If R DEF Sensor has trouble ERROR Code Start Start Is MAIN PCB DATA1. Connector CN30 and CN76 inserted Temperature table correctly? Bad contact of connector/ insert correctly ** Measuring point of resistance value according to Sensor ** R-DEF : CN30-"8"...
  • Page 79 TROUBLESHOOTING 4) If Ambient Sensor has trouble ERROR Code Start Start DATA1. MAIN PCB Connector CN78 inserted Temperature table correctly? Bad contact of connector/ insert correctly ** Measuring point of resistance value according to Sensor ** Ambient : CN78-”8”↔ “12” measuring resistance value ** Placed in the right top table of upper hinge.
  • Page 80 TROUBLESHOOTING 5) If F Sensor has trouble ERROR Code Start Start Are MAIN PCB DATA1. Connector CN30 inserted correctly? Temperature table Bad contact of connector/ insert correctly ** Measuring point of resistance value according to Sensor ** F : CN30-"1" ↔ "4" measuring resistance value F Sensor unit normal? ** 0Ω: Short trouble / Ω∞: Open trouble Refer to circuit diagram in the manual...
  • Page 81 TROUBLESHOOTING 6) If F DEF Sensor has trouble ERROR Code Start Start DATA1. MAIN PCB Connector CN30 and CN76 Temperature table insert correctly? Bad contact of connector/ insert correctly ** Measuring point of resistance value according to Sensor ** F-DEF : CCN30-”5” ↔ CN76-”1” measuring resistance FZ DEF Sensor unit value normal?
  • Page 82 TROUBLESHOOTING 7) If Ice Room Sensor has trouble ERROR Code Start Start Is MAIN PCB DATA1. Connector CN78 and CN76 inserted Temperature table correctly? Bad contact of connector/ insert correctly ** Measuring point of resistance value according to Sensor ** Ambient : CN78 ”10”↔...
  • Page 83 TROUBLESHOOTING 8) Mid Drawer Sensor has trouble ERROR Code Start Start Is MAIN PCB DATA1. Connector CN30 and CN76 insert Temperature table correctly? Bad contact of connector/ insert correctly ** Measuring point of resistance value according to Sensor Is Mid drawer Sensor Flex : CN30 ”9”...
  • Page 84 TROUBLESHOOTING 9) If Humidity Sensor has trouble ERROR Code Start Start Is MAIN PCB Connector CN30 inserted correctly? ** Measuring point of resistance value according to Bad contact of connector /insert correctly Sensor" Humidity : CN30 ”1” ↔ ”3” Is Humidity Sensor Resistance value with opened : about 50Ω...
  • Page 85 TROUBLESHOOTING 10) Mid Drawer Room Damper Heater has trouble (OPTION) ERROR Code Start Start Is Damper Heater normal?(about135ohm) Bad contact of connector/ insert correctly Measure the voltage of Resistance Is MAIN PCB connector between ① - ② after (CN77) inserted correctly? CN77 connector open / 1350 ohm ±...

  • Page 86: If Fan Does Not Operate

    TROUBLESHOOTING 4-2-2. If FAN does not operate - The refrigerator of this model has BLDC FAN motor. BLDC motor is driven by DC 7~12V. - On the normal condition of COMP ON, it operates together with F-FAN motor. If door is opened and closed once at a high ambient temperature, it will be operated after 1 minute delay. Therefore, you are advised not to taken it for an error.

  • Page 87: If Ice Room Fan Does Not Operate

    TROUBLESHOOTING 4-2-3. If ICE Room Fan does not operate - This refrigerator has BLDC FAN motor. BLDC motor is driven by DC7~12V. - When COMP ON, normally operates with F-FAN motor. - If there is any trouble, you should select the self-diagnostic function to check the trouble before power off. - When pressing the ICE TEST S/W for a certain period of time (over Start 1.5sec), the function is accomplished.
  • Page 88 TROUBLESHOOTING 4-2-4. When ICE MAKER(FF) does not operate 1. Water will be automatically supplied to the Ice Maker depending on temperature & time conditions, and ice will be produced to dispense. 2. Power is applied to one end of the wires. So, make sure to refer to its Exploded View whenever doing the disassembly.
  • Page 89 TROUBLESHOOTING 4-2-5. If defrost does not operate (F,R DEF Heater) R DEF ERROR F DEF ERROR Start **Measuring point of resistance value according to heater** F-DEF : CN70 “3”(Brown) ↔ CN72 ”3” (Gray) measuring resistance value(63 ohm ± 7%) Are the all deforst heater normal? R-DEF : CN70 ”1”(White) ↔...
  • Page 90 TROUBLESHOOTING 4-2-6. When Power is not applied Caution Start At the power of SMPS PCB, the AC115(230)V power and a high-voltage over DC 170(325) V are occurred. Please take care of yourself on repair and measurement. Is the power plug connected? Make sure the plug is connected and not loose.
  • Page 91 TROUBLESHOOTING 4-2-7. When Compressor does not run (Inverter COMP.) Start 10 minutes have passed since COMP was off Check in 10 minutes When Forced Operation Refer to the TEST mode is activated, COMP Function in this manual operates Forced Operation signal sound should be checked F-Sensor is Good 0~800Hz 50%...
  • Page 92 TROUBLESHOOTING 4-2-8. When alarm sounds continuously without stop(related with buzzer sound) ① If 'ding-dong'sound continuously Start Door is ajar Is door closed completely? Remove causes after comprehending the conditions of interferance by door gasket, food etc, Is water penetrated into the door switch? Replace Door S/W Seperate the door switch andcheck if the Is the door...
  • Page 93 TROUBLESHOOTING ③ If buzzer does not sound Buzzer is installed on the panel PCB in this model. If buzzer does not sound even though the button is pressed, manual operation is started and door is opened, it should separate panel PCB and check the breakage of buzzer and bad soldering. It is very hard to repair the panel PCB because it consists of SMD assemblies.
  • Page 94 TROUBLESHOOTING 4-2-9. When the Panel PBA does not operate normally ① When the entire or a certain section of the Panel PCB does not light up - There is a MICOM embedded in the Panel PCB. So, take care when doing repairs. And, except the Solder Touch, replace the PCB.
  • Page 95 TROUBLESHOOTING 4-2-10. If Mid drawer Panel PCB is not working normally You should check the display after door opening because the display of this model operates only when the fresh food compartment door is opened. Start room Does R Door switch operate normally? Check and repair the switch * Refer to <how to repair door switch>...

  • Page 96: When Refrigerator Room Lamp Does Not Light Up

    TROUBLESHOOTING 4-2-11. When refrigerator ROOM Lamp does not light up When controlling the regrigerator light with Regulator(12V) : LED LAMP Applying to the F/R Room compartment (Option) → * If the Vegetable Lamp does not work properly, check the R compartment LED Lamp because it is connected with the R compartment LED Lamp in parallel.

  • Page 97: If Ice Water Is Not Supplied

    TROUBLESHOOTING 4-2-12. If ICE Water is not supplied 1. Please shut the water supplying prior to repair. 2. Power is applied to the one end of wires. Be careful when disassembling not to get an electric shock. 2) Ice Water(R) Valve Start PCB Typical Ground J23 JUMMPER Is the confirming...

  • Page 98: If Cubed Or Crushed Ice Is Not Supplied

    TROUBLESHOOTING 4-2-13. If Cubed or Crushed Ice is not supplied Fridge door shall be Start closed during operation. Are Ices ejected? Are Ices in the Ice bucket? Is “Ice Off” mode ① Check the Ice making switch selected on the display ②...
  • Page 99 TROUBLESHOOTING 4-2-14. If Cover Ice Route Motor(Geard Motor) is not working normally Caution 1. When replacing the Cover Ice Motor, pull out the plug to avoid an electric shock. 2. Be careful! When disassemble the Cover Ice Motor, spring can jumped out and may cause personal injury. 3.
  • Page 100 TROUBLESHOOTING 4-2-15. IR Sensor Trouble-Shooting 1. W h e n t h e I R s e n s o r i s d e f e c t i v e , i c e i s n o t p r o d u c e d e v e n i f t h e r e i s n o I c e M a k e r E r r o r , I c e M a k e r S e n s o r E r r o r o r t h e I c e M a k e r F u n c t i o n E r r o r .
  • Page 101 TROUBLESHOOTING 4-2-16. LED blinking frequency depending on protecting functions 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 102: Pcb Diagram

    5. PCB DIAGRAM 5-1) PBA Layout with part position ···························································································································104 5-2) PBA Layout with part position (Inverter Board) ·································································································105 5-3) Connector Layout with part position (Main Board) ····························································································106 5-4) Connector Layout with part position (Inverter Board) ·······················································································107...

  • Page 103: 5-1) Pba Layout With Part Position

    This document can not be used without Samsung's authorization PCB DIAGRAM 5-1) PBA Layout with part position 1. DC12V, 5V, GND supplied from SMPS PCB (Not Used) 2. Circuit for controlling Step-Valve (3-Way Valve) * Option 3. FAN MOTOR control part : To supply the power from 8.3V ~ 12V according to the motor types.

  • Page 104: 5-2) Pba Layout With Part Position (Inverter Board)

    This document can not be used without Samsung's authorization PCB DIAGRAM 5-2) PBA Layout with part position (Inverter Board) 1. PCB Power Supply : From the AC Input Voltage(115V), it supplies DC 15V and 5V to the Inverter circuit for the Compressor control.

  • Page 105: 5-3) Connector Layout With Part Position (Main Board)

    This document can not be used without Samsung's authorization PCB DIAGRAM 5-3) Connector Layout with part position (Main Board) 5-3-1. RF28** / RF25HM** Main Valve Mid DRAWER-DOOR Switch OPEN MID DRAWER ROOM DISPLAY ICE Pipe Heater(FF) F/B ICE Water Pipe Heater (FF)

  • Page 106: 5-4) Connector Layout With Part Position (Inverter Board)

    This document can not be used without Samsung's authorization PCB DIAGRAM 5-4) Connector Layout with part position (Inverter Board) 5-4-1. RF28** / RF25HM** AC 115V COMP ① : DC 5V ② : GND ③ : COMP. RPM ④ : COMP.

  • Page 107: Wiring Diagram

    This document can not be used without Samsung's authorization 6. Wiring Diagram 6-1) Model : RF28** / RF25HM**...

  • Page 108: Block Diagram

    This document can not be used without Samsung's authorization 7. Block Diagram 7-1) Whole block diagram 7-1-1. MODEL : RF28HM** / RF25HM**...
  • Page 109 This document can not be used without Samsung's authorization Block Diagram 7-1-2. MODEL : RF28HM** / RF25HM**...

  • Page 110: Model Code Table

    This document can not be used without Samsung's authorization 8. Model code table 8-1) RF28HM**...

  • Page 111: 8-2) Rf25Hm

    This document can not be used without Samsung's authorization Model code table 8-2) RF25HM**...
  • Page 112 Asia: gspn2.samsungcsportal.com North & Latin America: gspn3.samsungcsportal.com China: china.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. © Samsung Electronics Co., Ltd.

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