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Samsung RF25HMEDBBC, Service Manual

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Samsung RF25HMEDBBC Service Manual Download Page 95

95

TROUBLESHOOTING

Is the 

connector of 

mid drawer room  

inserted correctly

Is MAIN PCB

Connector (CN51) inserted 

correctly?

Is signal of MAIN

PCB CN51 normal?

Is the lighting

operated when replace mid drawer

Panel-PCB?

Reinsert connector in MAIN PCB

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

Does R

 room 

 Door switch 

operate normally?

Is a key pressed

continuously?

Is the PCB system

still operated by separating

of the mechanism?

Is the lighting operated

after replacing the Mid drawer

Panel-PCB?

Is a normal voltage

outputted from MAIN PCB IC51 

during the key operating?

Check and repair the switch

* Refer to <how to repair door switch>

Reinsert Connector, Repair bad contact

Check voltage/Replace MAIN PCB

Panel PCB itself has trouble.

Reassemble PCB ASS'Y / Enforce 

the cancelation of pressed keys

Reassemble PCB ASS'Y /

Enforce the cancelation of pressed 

keys

Convertible compartment Panel

PCB itself has trouble.

①

  Replace MAIN PCB

②

   Check the short of MAIN 

Panel wire

①

  Check the wires of Mid drawer Room - disconnection, short between wires

②

  Recheck the control circuit of MAIN PCB Mid drawer Panel

③

  Check the wire assembling between Panel and MAIN

①

   Check the wire of Mid drawer Room - disconnection, short 
between wires

②

   Check the short/open of the mid drawer panel lighting circuit in 
MAIN PCB.

②

  If Panel PCB Key is not selected

     

※

 If it is not repaired with the above basic checking method

If Panel Key is not 
selected

☞

  Checking method of voltage Based on PCB typical 
Ground J23 JUMMPER

    1) Key voltage ; CN51-"11"(Sky Blue)

        a) Working: 2V

±

0.5V b) Normal: 0V

PCB Typical Ground J23 JUMMPER

The Voltage of KEY is

Working every 2msec/4min

4-2-10. If Mid drawer Panel PCB is not working normally

Summary of Contents for RF25HMEDBBC

Page 1: ...HMEDBSR AA RF28HMEDBBC AA RF28HMEDBWW AA RF25HMEDBSR AA RF25HMEDBBC AA RF25HMEDBWW AA REFRIGERATOR REFRIGERATOR 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 RF28 RF25 ...

Page 2: ...ppliance 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 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: ...oor 29 3 3 Door Handle Refrigerator 31 3 4 Door Handle Freezer Flex zone 32 3 5 Refrigerator Light 33 3 6 Cover Display Water Dispenser 33 3 7 Water Dispenser RF25HM 34 3 8 Water Dispenser RF28HM 36 3 9 Glass Shelf 37 3 10 Foldable Glass Shelf 38 3 11 Vegetable Fruit Drawers Shelf 38 3 12 Case Water Filter 39 3 13 Water Tank 40 3 14 Motor Damper 42 3 15 Water Filter Assembly Disassembly 43 3 16 Ve...

Page 4: ...ccording to the trouble symptom Flow Chart 74 5 PCB DIAGRAM 102 5 1 PBA Layout with part position 103 5 2 PBA Layout with part position Inverter Board 104 5 3 Connector Layout with part position Main Board 105 5 4 Connector Layout with part position Inverter Board 106 6 Wiring Diagram 107 6 1 Model RF28 RF25HM 107 7 Block Diagram 108 7 1 Whole block diagram 108 8 Model code table 110 8 1 RF28HM 11...

Page 5: ...pared with the state before disassembly Check the use circumstance of refrigerator If the refrigerator is installed at the place that is damp or wet or status of installation is unstable change the installation place Ground the refrigerator properly Particularly Be sure to earth when there is a risk of an electric leakage by humidity or wetness Do not use multi plugs in a plug socket at the same t...

Page 6: ...Caution Caution Unplug Use the rated components on the replacement Check the correct model rated voltage rated current operating temperature and so on On repair make sure that the wires such as harness are bundled tightly Bundle tightly wires in order not to be detached by the external force and then not to be wetted Check if there is any trace indicating the permeation of water If there is that k...

Page 7: ...users to store articles on the product Opening or closing the door may cause things to fall down which may cause injury Prohibition Warning Caution Do not allow users to disassemble repair or alter It may cause fire or abnormal operation which leads to injury Do not disassemble Do not allow users to plug several appliances into the same power receptable May cause abnormal generation of heat or fir...

Page 8: ...e rest of the flooring This surface should be strong enough to support a fully loaded refrigerator or approximately 660lbs 299kg FLOORING Protect the finish of the flooring Cut a large section of the cardboard carton and place under the refrigerator where you are working When moving be sure to pull the unit straight out and push back in straight MOVING ...

Page 9: ... Dimensions of Refrigerator Inches 19 2 6 Optional Material Specification 20 2 7 Refrigerant Route in Refrigeration cycle 21 2 7 1 PRINCIPLE OF FREEZEER 22 2 7 2 Operation theory of refrigeration cycle components 23 2 7 2 Operation theory of refrigeration cycle components 24 2 7 2 Operation theory of refrigeration cycle components 25 2 7 3 Refrigeration Cycle Type 26 2 8 Cooling Air Circulation 27...

Page 10: ...ator are cooled individually as required and are therefore more efficient Food odor from the refrigerator does not affect food in the freezer due to separate air flow circulation Flex Zone The Flex Zone is a full width independent mid drawer with adjustable temperature control Counter Height Design The Independent Mid Drawer Flex zone is counter Height to fit contemporary kitchen One Lever Dispens...

Page 11: ...zone and freezer door 3 Smart Divider Easy rail partition can divide off 4 independent spaces easily The rail partition allows you to divide the space of the convertible room easier 4 Slim Water Filtration System Slim water filter is placed between crispers for changing filter conveniently without removing items from Refrigerator 5 Touch Sensor Lighting The display change more wider and apply Blue...

Page 12: ... Temperature 70 F 21 C 90 F 32 C Refrigerator 34 F 1 C 46 F 7 C 34 F 1 C 46 F 7 C Flex Zone 29 F 1 C 42 F 5 C 29 F 1 C 42 F 5 C Freezer 8 F 22 C 8 F 14 C 8 F 22 C 8 F 14 C Run Time 60 80 REFRIGERATION SYSTEM Refrigerant Charge R134a 5 64 oz 160g MKV190C L2B 1314 Btu hr 0 385kw Compressor oil Freol α 15c R Capillary tube Dia Length 0 032 118 0 82mm 3500mm F Capillary tube Dia Length 0 032 118 0 82m...

Page 13: ...terior Views Slide Shelf Light FF Ice Maker Foldable Shelf Quick Space Glass Shelf Door Bins Freezer Drawer Bin Auto Pull Out Drawer Vertical Hinged Section Vegetable Fruit Drawers Guard Water Filter Fixed Shelf Convertible Room Light ...

Page 14: ... 01 Cu ft 396 8ℓ Efficiency of Volume 60 Weight Set 374 8 Pounds 170 kg 332 9 Pounds 151 kg Packing 403 4 Pounds 183 kg 355 Pounds 161 kg Packing Width 38 1 4 Inch 972mm 35 1 4 Inch 894mm Depth 36 7 8 Inch 937mm 36 1 4 Inch 920mm Height 76 5 8 Inch 1946mm 76 3 8 Inch 1939mm Compressor Reciprocate Rated Frequency and Frequency AC 115V 60Hz Refrigerant R 134a Foaming Agent C Pentane Refrigerant Inpu...

Page 15: ...OR F SENSOR 502AT 8 22 5 20 11 24 2 19 1 17 5 21 8 14 11 12 5 15 Flex Model Temperature Selection ON OFF THERMISTOR F SENSOR 502AT 29 1 32 0 26 3 42 5 45 7 39 4 Refrigerator Model Temperature Selection ON OFF THERMISTOR R SENSOR 502AT 34 1 36 2 32 0 38 3 40 4 36 2 46 7 48 8 44 6 Defrost Related Components Defrost Cycle First Defrost Cycle Concurrent defrost of F and R 6hr 10min Defrost Cycle FRE 1...

Page 16: ...5 5 Temp OFF 156 2 48 2 69 9 Rated Voltage AC 115V 60Hz Motor BLDC FRE DC12V 2 1W DREP5020LC Motor BLDC REF DC12V 1 92W 3612JL 04W S49 G51 Motor BLDC CIRCUIT DC12V 1 7W DRCP8020LA Motor BLDC ICE ROOM DC12V 3 2W DREP5020LB Auger Motor AC120V 102W ISG 3240SSJ Geared Motor ICE MAKER DC12V GSP 24RW 001F Geared Motor DISPENSER AC120V 3 5W MVCD18AR19 Motor DAMPER DC12V NSBY001TJ1 Lamp LED FRE DC 12V 85 ...

Page 17: ...ations 4 102mm 36 1 2 926mm 35 6 8 908mm 34 864mm 1 1 4 30 6mm 70 1777mm 8 15 16 228mm 22 9 16 573mm 20 3 4 528mm 29 1 2 751mm 49 1 4 1254mm 22 9 16 573mm 2 51mm 1 2 13mm 2 5 Dimensions of Refrigerator Inches Model RF28HM ...

Page 18: ...fications 3 3 8 87mm 36 1 2 925mm 34 863mm 1 3 16 29 6mm 32 3 4 830mm 70 1777mm 9 1 16 230mm 19 13 16 503mm 30 765mm 53 3 4 1366mm 48 1221 mm 17 1 8 435mm 22 1 4 564 5mm 35 1 4 896mm 2 3 8 59 5mm 7 16 11mm Model RF25HM ...

Page 19: ...ional Material Specification Part Name Part Code AMOUNT ASSY PACKING SUB DA99 03490L 1 LED LAMP REF DA97 12606A 1 LED LAMP CASE VEG R L DA41 00519S 1 LED LAMP FRE DA41 00676G 1 LED LAMP MID DA41 00676G 1 LED LAMP REF SIDE DA41 00519Q 2 ...

Page 20: ... 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: ...21 Product Specifications 2 7 1 PRINCIPLE OF FREEZEER ...

Page 22: ...e lower part of product and radiate heat manually by fan Radiate condensed potential heat up to liquefy completely and make change the state without changing the gas temperature itself Pipe thickness Low pressure 6 3mm High pressure 4 7mm Capillary About 0 4 0 8mm Condenser length Based on 300ℓ 26 5 M Assistance 5 M HOT PIPE 6 6 M CLUSTER PIPE 15 M Capillary 1 Role A device which makes low tempera...

Page 23: ...ant gas flowed out from evaporator and make high temperature and pressure refrigerant liquid in the compressor and send it to the condenser 2 Type of Condenser a Back and forth motion type A method that pistol makes back and forth motion through shaft and cylinder of motor rotation and compresses Used for household refrigerant b Rotary Type A method that inhales the refrigerant gas through the gap...

Page 24: ...hetic insulating material insulator Influence of foreign substance Increase of condensed temperature Increase of temperature Decrease of cooling efficiency Shorten the life by friction between oil and foreign substance in the compressor Accumulator 1 Role To send a pure refrigerant gas to compressor by removing completely the refrigerant liquid from evaporator If a refrigerant liquid go into the c...

Page 25: ...roduct Specifications 2 7 3 Refrigeration Cycle Type HM Cycle Compressor Condenser Hot Pipe Back Cluster Pipe Refrigerator Evaporator Dryer Capillary Tube Compressor Freezer Evaporator ICE Pipe Suction Pipe ...

Page 26: ...26 Product Specifications 2 8 Cooling Air Circulation Refrigerator Flex Zone Freezer ...

Page 27: ...le Fruit Drawers Shelf 39 3 11 Case Water Filter 40 3 12 Water Tank 41 3 13 Motor Damper 43 3 14 Water Filter Assembly Disassembly 44 3 15 Vertical Hinged Section 45 3 16 Evaporator Cover In Refrigerator 46 3 17 Evaporator In Refrigerator 47 3 18 Freezer Door 48 3 19 Convertible Door 49 3 20 Flex Zone Door 50 3 21 Ice Maker 51 3 22 Flex Zone Light 53 3 23 Freezer Light 53 3 24 Side Light 54 3 25 D...

Page 28: ...es or glass containers in the freezer When the contents freeze the glass may break and cause personal injury Do not store volatile or flammable substances in the refrigerator The storage of benzene thinner alcohol ether LP gas and other such products may cause explosions Water whitening phenomenon All water provided to refrigerators flows through the core filter which is an alkaline water filter I...

Page 29: ...eft door hinge To disconnect the connector more easily press the end of the hook and pull connector CAUTION Make sure unit is unplugged 3 As shown in the picture Remove water tube from hinge by holding at the both sides of the Tube Fitting and pulling it out And remove the Tube Fitting by pulling the water hose after pushing in the locking ring tab at the end of the Tube Fitting 4 After pulling th...

Page 30: ...aightly up to remove CAUTION Be careful not to drop the door 6 Lift the grommet hinge straightly up to remove 7 With a Philips head screwdriver remove the screw attatched to the lower left and right door hinges With a 0 4in Hex wrench remove the 2 flat head screws Remove the lower left and right door hinges ...

Page 31: ...ssembly and Reassembly 3 3 Door Handle Refrigerator Part Name How To Do Descriptive Picture Door Handle Fridge 1 Loose Set Screw with 0 1in Hex wrench and pull front the handle 2 Remove the cover vinyl of door ...

Page 32: ...rt Name How To Do Descriptive Picture Door Handle Freezer 1 Loosen the Set Screw situated at the bottom right of the appliance about 0 1in by using Hex wrench 2 Pull the Set handle out by moving it to the right side CAUTION Be careful not to scratch or break the parts ...

Page 33: ... off 2 Remove the 2 screws And separate the LED panel Part Name How To Do Descriptive Picture Cover Display 1 Remove a screw under the display cover 2 Remove the display cover by pulling it up Put the thumbs on the surface door and hold the bottom of the Display Panel with four fingers And then pull out the Display Panel as shown in the photo to remove it CAUTION Take care not to break the Locking...

Page 34: ...criptive Picture Cover Display 3 Disengage the housing connect of display cover Part Name How To Do Descriptive Picture Water Dispenser 1 Disengage the Housing Connectors by pushing a flat blade screwdriver 2 Remove 2 screws of the Case Ice Route Assy 3 Pull the Case Ice Route Assy ...

Page 35: ... 1 Assembly shall be in order from the disassembly Case Ice and Route shall be assembled inside of hose Otherwise assemble cannot be accomplished HOSE HOSE hose 2 When assembling Cover Display first insert it from leftside and then assemble to rightside Otherwise the hook can be broken ...

Page 36: ... pushing a flat blade screwdriver 2 Remove 2 screws of the Case Ice Route Assy 3 Pull the Case Ice Route Assy 4 Assembly shall be in order from the disassembly Make sure to fix the hose to the Case Ice Route before assembling the Display 5 When assembling Cover Display first insert it from upper side and then assemble to bottom side Otherwise the hook can be broken ...

Page 37: ...37 Disassembly and Reassembly 3 9 Glass Shelf Part Name How To Do Descriptive Picture Glass Shelf Remove the shelf by lifting the front part of the shelf up and pulling it out ...

Page 38: ...ws of the Folderble Glass Shelf Part Name How To Do Descriptive Picture Vegetable Fruit Shelf 1 Remove the vegetable fruit drawer by pulling the roller part and lifting it up 2 While pressing the button on the left of the shelf in txhe picture lift up the Vegetable Fruit Drawer Shelf Refer to the picture 3 Remove the vegetable fruit drawer shelf by pulling it out Refer to the picture ...

Page 39: ... and all drawers and shelves 1 Remove the 3 screws holding down the Top Table and remove the Top Table 2 a Remove Cover Tube Fitting b Remove the Water tube blue from the tube fitting by pushing in on the locking ring and pulling out the tube 3 Remove three screws securing the water tubes 4 a Pull the Water blue hose out b Push the Tube Fitting and pull the grey hose out ...

Page 40: ...connect the 2 Housing connectors 6 Lift and pull the Case Water Filter out 3 13 Water Tank Part Name How To Do Descriptive Picture Water Tank Before disassembling the Water Tank take the water filter and water tray out 1 Remove 2 screws beside 2 a Lose the hooks by pushing the flat blade driver ...

Page 41: ...ks by pushing the flat blade driver 3 Cut the sponge stick on the Case Water tank and divide Case Water Tank 4 Remove the tube clips and disconnect the water tank hoses by pulling the fitting tube 5 Be careful when you connect the hoses White hoses go to the In mark Other hoses go to the out mark ...

Page 42: ...tor Damper Part Name How To Do Descriptive Picture Motor Damper 1 Remove the 2 screws under the water filter case and take off the cover damper 2 Disengage 2 housing connector 3 Take off the Motor Damper by pulling a flat blade screwdriver ...

Page 43: ...r count clockwise Refer to the picture 2 Remove the water filter by pulling it Refer to the picture 3 Push the water filter directly 4 Turn the water filter clockwise until it locked CAUTION Be sure to flush the dispenser thoroughly approx 6 to 7 minutes otherwise water may drip from the dispenser This means that there is still air in the line ...

Page 44: ...d Section 1 Remove 2 screw cap parts with a flat blade screwdriver Refer to the picture CAUTION Be careful not to scratch or break the parts 2 Unscrew 2 screws 3 Disengage the internal housing connector of the vertical hinge 4 Remove the vertical hinged section by lifting the vertical hinge up Refer to the picture ...

Page 45: ...e picture CAUTION Be careful not to scratch or break the parts 2 Unscrew 4 screws 3 Remove the the lower part of angle mid by pulling it out and pushing it down Refer to the picture 4 Remove the hook by pulling it from the lower part and pushing the cover down Refer to the picture 5 Disconnect the 2 housing connectors Refer to the picture CAUTION Continues a work after confirming that fan operatio...

Page 46: ...the housing cover by pushing both lateral sides of the housing cover and pulling it out Refer to the picture 2 Disconnect the housing connector part on left side Refer to the picture left 3 Disconnect the housing connector on right side right 4 Remove the evaporator by lifting the bottom side of it up and pulling it out Refer to the pi cture ...

Page 47: ... system 3 After lifting the Freezer Guard up holding both sides remove it at the rail system CAUTION The box may get scratch on its side by getting twisted left and right when disassembling the drawer box 4 Press the fixing hook of rail system 5 After holding and pulling out the top of Freezer Door remove it at the rail system CAUTION Make sure there is no scratch at the end of Sliding Rail by bei...

Page 48: ...ll the and remove the convertible room by pulling it to your body with both hands open to full extension 2 Remove the cover housing by a flat blade screwdriver 3 Disengage the housing 4 Unscrew 4 bolts 2 bolts each on the both sides 5 Lifting up the convertible door remove the convertible door from the rail ...

Page 49: ...49 Disassembly and Reassembly 3 21 Flex Zone Door Part Name How To Do Descriptive Picture Mid drawer 6 Remove the shaft gear by pull the pin out 7 Remove the screw and pull out The rail ...

Page 50: ... within 15 seconds after it is shifted to the Test Mode its function will change in the following order Manual operation1 FF Manual operation2 0F r manual defrost of fresh food compartments rd manual defrost of fresh and freezer compartments fd cancel Display all off Set unit to Fd for 5 minutes This will allow for easy removal of the ice maker 3 Lift up the Ice Bucket and pull it out 4 Remove the...

Page 51: ...m the bottom of the ice maker Refer to the image 10 Push down the refrigerant pipe slightly and separate the refrigerant pipe and the Ice Maker Assembly completely 11 While pressing the Hook pull out the Ice Maker 12 While pushing down the Duct Tray Ice pull out the Ice Maker carefully and remove it When removing the ice maker be careful not to damage the grommets on the tray or the refrigerant tu...

Page 52: ... To Do Descriptive Picture Flex Zone Light 1 Remove the cover Flex zone lamp by a flat blade screwdriver 2 Disengage the housing Part Name How To Do Descriptive Picture Freezer Light 1 Remove the cover Freezer lamp like the way disassembling the Flex zone lamp 2 Disengage the housing ...

Page 53: ...cture Refrigerator Light 1 Remove the cover Side lamp by a flat blade screwdriver 2 Separate the Side lamp from the case 3 Disengage the housing Part Name How To Do Descriptive Picture Door Switch In Freezer 1 Remove the cover Freezer lamp like the way disassembling the Flex zone lamp 2 Disengage the housing ...

Page 54: ...zer door and freezer drawer by pulling out the drawer and then unscrewing 2 screws 2 Lift up the evaporator cover 3 Disengage the 3 housing connectors and remove the evaporator cover Part Name How To Do Descriptive Picture Evaporator In Freezer 1 Remove the housing connector part left one 2 Remove the evaporator by pulling the lower part of the evaporator while lifting it up ...

Page 55: ...5 screws of COVER COMP CAUTION Be careful not to damage from the inner hole of cover comp 2 Remove the DRAIN HOSE 3 Remove 1 screw 4 Disengage the HOUSING CONNECTOR Refer to the picture 5 Pull it forward and lean against the DRAIN HOSE 6 Rotate it based on the PIPE 7 The FAN is disassembled Assembly it in reverse order ...

Page 56: ...e Comp Cooling Fan Motor 1 Remove the screw with a flat blade screwdriver 2 Remove the motor fan by pulling the fan out while graping the motor part 3 Unscrew 2 screws fixed in the motor 4 Remove the BRACKET MOTOR with a flat blade screwdriver 5 Remove the MOTOR after pulling the BRACKET MOTOR out ...

Page 57: ...x Part Name How To Do Descriptive Picture PBA Main 1 Remove the 2 screw attached to the upper left and right Case PCB Panel with a phillips screwdriver 2 Disengage all housing connectors from the main PCB CAUTION Before doing the above make sure that the unit is unplugged 3 Press the lower locking hook down and remove the Main PBA by pulling it out Refer to the picture PBA INVERTER 1 Remove the IN...

Page 58: ...Cover Unit Part Name How To Do Descriptive Picture Cover Unit Supplies A general hexagonal wrench Thickness is under 6mm 1 Check the hook on the mark of 2 Inset the wrench to the side of hook on the mark of 3 Pull with the arrow direction and remove it ...

Page 59: ...59 4 TROUBLESHOOTING 4 1 Function for failure diagnosis 61 4 2 Diagnostic method according to the trouble symptom Flow Chart 75 ...

Page 60: ...r will be displayed FF and OF r means manual operation 1 and 2 separately These 2 functions operate with same RPM of COMP 1 3 If manual operation is selected compressor will run at once without 7 minutes delay in any mode If the refrigerator is on the defrost cycle at the moment defrost will be finished and manual operation will begin Be careful if manual operation get started at the moment of com...

Page 61: ...nel change to the test mode and test button is pressed one more time defrosting of fresh food and freezer compartments will be canceled and the unit will return to the normal operation Or all test functions will be canceled by turning main power ON and OFF 3 Test cancel mode 1 1 If there is no answer for 10 seconds after the panel micom received the requirement of communication PC Er or PC Ch disp...

Page 62: ...eturn to normal display mode 2 1 If Freezer Key Fridge Key are pressed simultaneously for 6 seconds during normal operation the temperature setting display will operate for 2 seconds ON OFF 0 5sec each If Freezer Key Fridge Key are pressed simultaneously for 8 seconds including above 2 seconds self diagnostic function will be selected 2 2 At this moment self diagnostic function will be returned wi...

Page 63: ... operation of applicable fan motor Feed back signal line contact error motor wire separation motor error The voltage of MAIN PCB CN76 3 Yellow CN76 1 Gray shall be between 7V 12V FF FAN Error Display error during operation of applicable fan motor Feed back signal line contact error motor wire separation motor error The voltage of MAIN PCB CN76 4 Orange CN76 1 Gray shall be between 7V 12V C FAN Err...

Page 64: ...hort circuit After separating MAIN PCB CN70 wire from PCB resistance value between CN70 Brown CN70 Gray shall be 63 230 ohm 7 Resistance value is varied by input power 0 ohm heater short ohm wire bimetal open Must power off Ice Room Bucket Heater Error Display error when open error is detected by ice room bucket heater separation of Ice Room Bucket Heater housing part contact error disconnection s...

Page 65: ...om signal is outputting However It means that micom signal is outputting it does not mean whether load is operating or not That is to say that though load operation is displayed load could not be operated by actual load error or PCB relay error etc This function would be applied at A S 4 Load condition display function will maintain for 30 seconds and then normal condition will be returned automat...

Page 66: ...isplay mode F 1 ⓐ COMP When COMP operates applicable LED Blink F 1 ⓑ F FAN High When FZ compartment FAN operates with high speed applicable LED Blink F 1 ⓒ F FAN Low When FZ compartment FAN operates with low speed applicable LED Blink F 1 ⓓ F DEF Heater When FZ compartment defrost heater operates LED Blink F 1 ⓔ C FAN High When C FAN operates with high speed applicable LED Blink F 1 ⓕ C FAN Low Wh...

Page 67: ... During Cooling Off mode if fresh food and freezer compartments sensors are higher than 149 F 65 C Cooling Off mode will be canceled automatically and freezing operation will be returned There is no buzzer sound when the Cooling Off mode is canceled by the temperature 5 Operation contents of Cooling Off mode Display Fan motor and etc operate normally not to operate compressor only Defrost is not o...

Page 68: ...Fresh food and freezer compartments case will be explained only because all options are operated with the same method according to the option table If Alarm Key Fridge Key are pressed simultaneously for 12 seconds option setting mode will be started KEY operation method for changing to option mode KEY control method after converting to option mode Key control in option mode Freezer Key Alarm Key F...

Page 69: ...ezer compartment temperature 4 Option changing method as above is the same as all RFG29 model 5 By the same method as above it is possible to control the fresh food compartment temperature water supply ice maker harvest temperature time defrost return time hysteresis by temperature notch gap by temperature etc 6 Option function is set in the EEPROM at shipping process in the factory You would bett...

Page 70: ...value Temp compensation 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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 2 1 0 3 1 5 4 2 0 5 2 5 6 3 0 7 3 5 8 4 0 FZ compartment Code Setting value Temp compensation 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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 2 1 0 3 1 5 4 2 0 5 2 5 6 3 0 7 3 5 8 4 0 FZ compartment Code ex If you want to change the fresh f...

Page 71: ...19 Setting value Ratechange 0 1 0 0 20 operation up to 100 FZ compartment Code Reference Value Reference Value Code Reference Value Code Reference Value Code ex If you want to change the mid drawer room temperature to 2 1 0 Setting value Temp compensation 0 1 2 3 4 5 6 7 0 0 0 1 0 5 2 1 0 3 1 5 4 2 0 1 0 5 2 1 0 3 1 5 FZ compartment Code Reference Value 4 Temperature changing table of Pantry Mid D...

Page 72: ...ater supply to ice tray Set item Amount of Water Supply Fridge Room 7 SEG 32 Reference Value Code Reference Value Code Reference Value Code Reference Value Code Reference Value Code ex If you want to change the ice maker dropping standby time to 18minutes Reference Value 6 Time changing table of ice maker dropping standby time Set item Ice Maker StandbyTime Fridge Room 7 SEG 33 Setting value Temp ...

Page 73: ...ce Maker Dropping Temperature Set item Ice Maker DroppingTemperature Fridge Room 7 SEG 35 Reference Value Code Reference Value Code Reference Value Code Reference Value Code Reference Value Code ex If you want to change the ice room standard temperature to 5 2 5 Reference Value 7 Temperature changing table of ice room Set item Ice RoomTemp Shift Fridge Room 7 SEG 34 Setting value Temp compensation...

Page 74: ... 68 69 8 71 6 73 4 75 2 77 78 8 80 6 82 4 84 2 86 87 8 89 6 91 4 93 2 95 96 8 98 6 100 4 102 2 3 107 3 057 3 006 2 955 2 904 2 853 2 802 2 751 2 700 2 649 2 599 2 548 2 498 2 449 2 399 2 350 2 301 2 253 2 205 2 158 2 111 2 064 2 019 1 974 1 929 1 885 1 842 1 799 1 757 1 716 1 675 1 636 1 596 1 558 1 520 1 483 1 447 1 412 1 377 1 343 1 309 1 277 1 253 1 213 1 183 16419 15731 15076 14452 13857 13290...

Page 75: ...5 3152 3179 3206 3233 3260 3288 3316 3344 3372 3400 3426 3452 3478 3504 3530 3566 3595 3624 3653 3683 186 193 200 207 213 220 227 233 240 247 253 259 265 272 278 284 291 297 303 309 315 321 327 333 339 345 350 356 362 368 373 379 384 390 395 401 406 412 417 422 428 433 438 444 449 454 460 465 470 475 481 486 491 497 502 507 513 518 523 528 533 538 543 548 553 559 564 569 575 580 585 590 596 601 60...

Page 76: ...check the wire connection part NO 0 6V Measurement 4 6V Check the iced solder solder bridging disturbed solder NO No trouble with PCB and temperature sensor Recheck the bad contact of the connection Measuring point of resistance value according to Sensor ICE MAKER CN90 1 7 measuring resistance value 0Ω Short trouble Ω Open trouble Sensor MICOM Connector number Voltage measured between 4 6V 0 6V Me...

Page 77: ...0 6 CN76 1 measuring resistance value 0Ω Short trouble Ω Open trouble Sensor MICOM Connector number Voltage measured between 4 6V 0 6V Measuring voltage IC01 MICOM 84 CN30 6 White and J23 JUMMPER from PCB typical Ground part are similar Check the measure on the voltage of Resistance R311 due to the SMD MICOM Checking method of R Sensor resistance CN30 6 White CN76 1 Gray Compare the temperature ta...

Page 78: ...76 1 measuring resistance value 0Ω Short trouble Ω Open trouble Sensor MICOM Connector Number Voltage measured between 4 6V 0 6V Measuring voltage of IC01 MICOM 86 CN30 8 Sky blue and J23 JUMMPER from PCB typical Ground part are similar CheckthemeasureonthevoltageofResistanceR313 duetotheSMDMICOM Checking method of R Sensor resistance CN30 8 Sky blue CN76 1 Gray Compare the temperature table after...

Page 79: ... in the right top table of upper hinge 0Ω Short trouble Ω Open trouble Sensor MICOM Connector number Voltage measured between 4 6V 0 6V Measuring voltage of IC01 MICOM 93 CN78 8 Yellow and J23 JUMMPER from PCB typical Ground part are similar Check the measure on the voltage of Resistance R315 due to the SMD MICOM Checking method of Ambient Sensor resistance CN78 8 Yellow 12 Yellow Compare the temp...

Page 80: ...UMMPER from PCB typical Ground part are similar Check the measure on the voltage of Resistance R309 due to the SMD MICOM Checking method of F Sensor resistance CN30 1 Yellow 4 Yellow Compare the temperature table after measurement DATA1 Temperaturetable ERROR Code Refer to circuit diagram in the manual F Connector CN30 4 Yellow to J23 JUMMPER PCB typical Ground Checking method of F Sensor voltage ...

Page 81: ...ing resistance value 0Ω Short trouble Ω Open trouble Sensor MICOM Connector number Voltage measured between 4 6V 0 6V Measuring voltage of IC01 MICOM 83 CN30 5 Orange and J23 JUMMPER from PCB typical Ground part are similar Check the measure on the voltage of Resistance R310 due to the SMD MICOM Checking method of F DEF Sensor resistance CN30 5 Orange CN76 1 Gray Compare the temperature table afte...

Page 82: ...ance value 0Ω Short trouble Ω Open trouble Sensor MICOM Connector number Voltage measured between 4 6V 0 6V Measuring voltage of IC01 MICOM 92 CN78 10 Orange and J23 JUMMPER from PCB Typical Ground are similar Check the measure on the voltage of Resistance R316 due to the SMD MICOM Checking Mehod of Ice Room Sensor voltage CN78 10 Orange CN76 1 Gray Compare with the temperature table after measure...

Page 83: ...sor Flex CN30 9 CN76 1 measuring resistance value 0Ω Short trouble Ω Open trouble Sensor MICOM Connector number Voltage measured between 4 6V 0 6V Measuring voltage of IC01 MICOM 87 CN30 9 Yellow and J23 JUMMPER from PCB typical Ground part are similar CheckthemeasureonthevoltageofResistance R314 duetotheSMDMICOM Checking method of Mid drawer Sensor resistance CN30 9 Yellow CN76 1 Gray Compare the...

Page 84: ...tance value according to Sensor Humidity CN30 1 3 Resistance value with opened about 50Ω 0Ω Short trouble Ω Open trouble Sensor MICOM Connector number Voltage measured between 3 5V 1 0V Measuring voltage of ICO1 MICOM 81 CN30 3 Brown and J23 JUMMPER from PCB typical Ground part are similar Check the voltage of Resistance R321 Checking method ofHumidity Sensor resistance CN30 3 Brown 1 Gray Compare...

Page 85: ...tly NO 1 Recheck the wire 2 Replace PCB MAIN NO Normal recheck Measure the voltage of Resistance between after CN77 connector open 1350 ohm 7 ERROR Code Checking method of Flex Zone Room Damper resistance CN77 1 Black 2 Brown Ω Open wire disconnection heater disconnection trouble 0Ω Short trouble Start YES YES YES Initial power On Heater off Working heater 3 5V 4 8V MICOM 56 condition 3 5V 4 8V 0V...

Page 86: ...d the above operation will restart four times more If signals are not entered continuously the motor will be restarted after 10 Minutes This function is effective when the normal operation of motor would be restrained by foreign matters such as ice The voltage between PCB typical Ground J23 JUMMPER and F FAN CN76 3 Yellow shall be less than DC 7 12V R FAN CN76 4 Orange shall be less than DC 7 12V ...

Page 87: ... time over 1 5sec the function is accomplished After beginning of TEST mode Ice maker heater turns on for initial 2 minutes if the ice making temperature is below 0 If it exceeds 0 Ice maker heater turns on for initial 30 seconds After Ice maker heater turns on for 30 seconds it turns off and then Ice maker motor turns on As the Ice maker motor turns on TEST MODE COUNT operates 6 minutes count Con...

Page 88: ...otor Load 74 0V 5V Heater Load 118 0V 5V Heater operates differently according to the conditions Test Mode operation will be 30 sec Start Ice Maker rotates when pressing the Ice Maker testing switch over 1 5 sec Input Voltage of IC01 MICOM 73 is normal Is the water supplied in 6 minutes After detecting the full bucket and its horizontality Is the ICE Maker Sensor normal 1 Check Replace ICE MAKER K...

Page 89: ...ater heating would be finished and will return to cooling operation after a pause Check bimetal heater itself disconnection etc Replace failure Relay or replace PBA ASS Y Does the system return to cooling operation after heating for specified time Checking method of F R DEF Heater resistance value CN70 3 Brown CN72 3 Gray CN70 1 White CN72 3 Gray Recheck if resistance values are different after th...

Page 90: ... the SMPS deliver normal output voltages of 12V and 5V No Yes 4 2 9 Panel PBA Check Does the Panel PCB function properly No Yes 1 Resolder the PCB 2 Replace the PCB MAIN Is there any soldering short or poor soldering job detected on PCB No Yes Normal 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 measureme...

Page 91: ...ss 2 Replace the MAIN PBA 0 800Hz 50 Duty Signal Output No Check the Noise Filter Power Cord Make sure the connector is plugged properly No No Repair the sensing part or Replace MAIN PBA No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes When Forced Operation mode is activated COMP operates COMP operation signal CN103 1 3 is about DC2 3V Is DC 15V applied to ZD501 Is AC 115V applied to CN101 COMP Conn...

Page 92: ...mprehending the conditions of interferance by door gasket food etc Replace Door S W Repair wire connection and Door S W Normal Recheck and Replace Panel PBA MAIN PCB Door S W is normal Recheck and replace Panel PBA Replace Door S W Connector is not inserted Repair disconnect part Enforce the cancelation the manual operation defrost function or power On after power Off Seperate the door switch andc...

Page 93: ...ailure associated with panel is occurred except the minor error such as switch pressing error surface peeling off and so on Start Did lead of a component fall on the vibration plate of buzzer Is there any damage or breakage of the buzzer in the panel PCB Does it sound dingdong if press a button on the front panel Does it make a sound of door open alarm when you are opening the door of freezer or F...

Page 94: ... Cut and the Wire Short Check the Dispenser and the Top Cover Hinge Connectors Check the Wire Cut and the Wire Short Check the wire connection at the Fridge Top Cabinet Check the Wire Cut and the Wire Short Check Short Open at the Panel Communication the Power Supply Circuit of the Main PCB Yes No MAIN PCB Connector CN50 is inserted normally Yes The Panel PCB Connecter is connected properly Yes Wh...

Page 95: ...e Replace MAIN PCB Panel PCB itself has trouble Reassemble PCB ASS Y Enforce the cancelation of pressed keys Reassemble PCB ASS Y Enforce the cancelation of pressed keys Convertible compartment Panel PCB itself has trouble Replace MAIN PCB Check the short of MAIN Panel wire Check the wires of Mid drawer Room disconnection short between wires Recheck the control circuit of MAIN PCB Mid drawer Panel...

Page 96: ...ge Measuring the voltage of PCB typical Ground J23 JUMMPER and IC76 voltage CN78 3 Red R LED IC77 voltage CN78 1 Brown F LED Checking method of Door switch voltage Measuring voltage of CN76 12 Purple PCB typical Ground J23 JUMMPER PCB Typical Ground J23 JUMMPER R LED Lamp ON Close No Check the wire Re insert the connector No Yes Yes Yes Yes Yes Yes Yes Is the output voltage of IC01 MICOM 28 normal...

Page 97: ...ace PCB Check soldering short Replace PCB Check soldering short Replace PCB PCB Typical Ground J23 JUMMPER Checking method of voltage Based on PCB typical Ground J23 JUMMPER 1 Check the voltage of IC73 4 same voltage as IC01 104 IC72 3 same voltage as IC01 117 ICE Water valve waiting about 0V Based on PCB typical Ground J23 JUMMPER 2 IC73 13 and IC72 14 voltage ICE Water valve Waiting about 12V 0 ...

Page 98: ...place Is MICOM IC01 88 change into 0V when press Ice switch No Is the Dispenser Cover opened No Replace the MAIN PCB Errors on IC01 Is IC73 1 2 changed into 5V when pressing Ice Switch No RY7A RY7B RELAY Error Replace the MAIN PCB After disconnecting the CN72 CN73 measure The both ends of Contact points RY7A After disconnecting the CN72 CN73 measure The both ends of Contact points RY7A Is the cont...

Page 99: ...e Motor spring can jumped out and may cause personal injury 3 Motor will rotate continuously when the Motor Switch is not sensed Main PCB Check the wire OPEN SHORT between the Cover Ice Motor Rotation sensing switches Check the Short of Cover Ice Motor Control Circuit SSR75 in the MAIN PCB Replace the MAIN PCB or the Dispenser Cover Motor Is the AC input voltage applied to the both ends of the mot...

Page 100: ...displayed 2 Proceed with the Fridge Door being open and the Ice Bucket being removed Start Ice Full in Fridge Room The Emitter is on Fridge Changes to Ice Full Remove the Ice Bucket and turn on the Load Status Display Function Take a photo of the Emitter with the Cell Phone Receiver Defect Receiver Normal Emitter Normal Block the Receiver with a hand Emitter Defect Receiver Defect Yes Yes Yes No N...

Page 101: ...eration N A Starting Failure 1 Short between COMP U V and W phase CN04 2 Short among IPM Pins No 1 26 3 Drop the IPM operating Voltage under DC 13 5V 4 Other cases check the COMP cycle etc IPM Fault Abnormal Current Detection 1 Open the COMP wire CN04 2 Bad condition of R1 ex Bad soldering 3 Other cases check the COMP cycle etc Motor Locked Over RPM 1 Operating the locked rotor COMP within 5 secon...

Page 102: ...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: ...n the specified voltage 7 PLC input output PLC Power Line communication Option PLC module is not inserted unless specified occasion 8 Operate ICE MAKER supply power to MOTOR and sense the variation of switch 9 Main Micom Panel Micom serial communication circuit Dispenser option input part Water Cover Ice route switch 10 Mid drawer Room display control part display LED detect KEY state 11 Control M...

Page 104: ...ing Feedback Circuit It receives the COMP operation signals from the Main PBA and feedbacks the inverter errors to the Main PBA 3 Micom MN103SFC2D 4 BOOTSTRAP Charger It is an independent power circuit for the driving of the IMP High Phase IGBT 5 Current Pickup Circuit It pickups the currents taken by the Shunt resistance and does the PWM DUTY control 6 IPM FNE41060 5 2 PBA Layout with part positi...

Page 105: ...ICE Pipe Heater FF F B ICE Water Pipe Heater FF Mid Drawer Room Switch OPEN OPEN Mid Drawer Room LED Driver Ice Room Heater OPEN MID DRAWER ROOM DISPLAY OPEN This document can not be used without Samsung s authorization 5 3 Connector Layout with part position Main Board ...

Page 106: ...106 PCB DIAGRAM 5 4 1 RF28 RF25HM This document can not be used without Samsung s authorization 5 4 Connector Layout with part position Inverter Board AC 115V COMP DC 5V GND COMP RPM COMP Feedback ...

Page 107: ...107 6 Wiring Diagram 6 1 Model RF28 RF25HM This document can not be used without Samsung s authorization ...

Page 108: ...108 7 Block Diagram 7 1 1 MODEL RF28HM RF25HM 7 1 Whole block diagram This document can not be used without Samsung s authorization ...

Page 109: ...109 Block Diagram 7 1 2 MODEL RF28HM RF25HM This document can not be used without Samsung s authorization ...

Page 110: ...110 8 Model code table 8 1 RF28HM This document can not be used without Samsung s authorization ...

Page 111: ...111 Model code table 8 2 RF25HM This document can not be used without Samsung s authorization ...

Page 112: ...sion 2013 Printed in Korea 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 Europe CIS Mideast Africa gspn1 samsungcsportal com Asia gspn2 samsungcsportal com North Latin America gspn3 samsungcsportal com China china samsungportal com ...

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