Samsung DV448 Service Manual

12008 Appliance Products

10Technical assistance will not be able to help unless you are properly prepared with tools when you are with the product. • Multimeter requirements f

11Use for Defrost Heater testsUse for Sensor Voltage Tests or 20 VDC scale on some metersKnow your Know your meter scalesmeter scales

12REDO Prevention Tips1. The technician should always talk directly to the customer before each call. Many techs get their idea of what’s wrong via 2n

13Repair Codes Excluded from REDO calculation:• CEST: Customer Refuse Estimate•CLEA: Cleaning• CLEN: Cleaning• CUST: Customer Education• DTYX: Dirty•

14Quick Document Search1. From the Main Menu Select “Warranty/Parts”2. Type in the Model Number in theLeft Hand Search Field4. Manuals and Bulletins a

15To search for the Bill of Materials (BOM) 1. Click Warranty/Parts Tab2. Order management -> Parts Information -> Parts list by Model3. Type in

161. Click on the correct model code(Check country list on right to make sure it is the right model)2. Check mark the parts you need and Click CREAT P

17Refrigerator TechnologyChapter 2

18Dual Evaporator with TDM valve Quad Cooling RM Model Twin Cooling RS/RF/RB ModelsThe Time Divided Multi-cycle (TDM) Syst

19Inverter CompressorInverter compressors offer energy savings not available in a standard compressor

2Table of ContentsPAGE DESCRIPTION3 Support Information17 Refrigerator87 Window Air Conditioner97 Dishwasher161 Laundry316 OTR Microwave329 Electric R

20Refrigerant PathCompressor Sub-condenser Hot Pipe Dryer Step valve R Capillary Tube R/CR Evaporator C Capillary Tu

21Chapter 3Refrigerator Troubleshooting

22Refrigeration Troubleshooting• The Forced Operation Mode is a very valuable troubleshooting tool for testing compressor operation, fan operation and

23Refrigeration Troubleshooting• Forced Freeze Mode Inverter Compressors• The compressor is started without the 5 minute delay• You can force the thre

24Refrigeration Troubleshooting• Forced Defrost Operation• Standard compressor models can activate the Fridge defrost only, or both the Fridge and Fre

25Refrigeration Troubleshooting• Selecting the Forced Modes• When the two buttons are pressed together to enter the Forced Modes you must wait for the

26Test ModePress both buttons simultaneously for 8 seconds!Forced OperationForced OperationForced Defrost for FridgeForced Defrost for FridgeForced De

27For various refrigerator panelsPress both buttons simultaneously for 8 seconds!Forced CompressorForced CompressorForced Defrost for FridgeForced Def

28RFG29* Series Inverter Compressor Forced ModeSimultaneous manual defrost (fresh food and freezer compartments) functionForced Compressor HighForced

29RM257*** Series Inverter Compressor Forced ModeSimultaneous manual defrost (all four compartments) functionForced Compressor HighForced Compressor

3Samsung Support InformationChapter 1

30Forced Mode for Single Evaporator unitsUse Freezer Key as a Test KeyWait 5 seconds between button pushesRS26/2530**

31Refrigeration Troubleshooting• The Diagnostic Mode is the most valuable troubleshooting tool you have for troubleshooting a refrigerator. When you

32Refrigeration Troubleshooting• To enter the manual Diagnostic Mode you must press and hold two buttons, and hold them until the display stops blinki

33Refrigeration Troubleshooting• A Sample fault code would be this is an example of an Ice Maker Sensor failure.• Things that can hap

34If a corresponding LED flickers, it means an abnormality of a sensor or component. Press both buttons simultaneously for 8 secondsSelf Diagnostics

35Self DiagnosisHold Buttons until display stops blinking and beeps, then release and read fault codes. Various refrigerator panels are shown

36Error items for self-diagnosticsRefrigerator fan motor stuck or spinning to fastR-FAN ERROR4Refrigerator Defrost Sensor measures open or shorted DEF

37Error items for self-diagnosticsCR Compartment Sensor Error- This can be an Electric wire cut, short-circuit, contact failure, or missing sensor. Th

38Error items for self-diagnosticsCR Compartment defrosting heater- electric wire cut, short-circuit, contact failure, missing of sensor housing, or d

39Error items for self-diagnosticsFreezer compartment Defrost Sensor Error- This can be an Electric wire cut, short-circuit, contact failure, or missi

4

40Error items for self-diagnosticsFreezer Compartment defrosting heater- electric wire cut, short-circuit, contact failure, missing of sensor housing,

41Error items for self-diagnosticsIce Maker Fill line heater measures openICE PIPE HEATER ERRORCR Compartment fan motor stuck or spinning to fastCR-FA

42Error items for self-diagnostics2625TROUBLELEDError itemsNOBad communication between LOAD↔MAIN MICOML↔M COMMUNICATION ERRORThis error is not applica

432008 French Door Refrigerator Error CodesCodes are shown for example, a full list of codes for the specific product is available in the service manu

442008 French Door Refrigerator Error CodesCodes are shown for example, a full list of codes for the specific product is available in the service manu

45Defrosting TroubleshootingFrozen EvaporatorAsk the Consumer if there has been water or ice build up on the bottom of the Fridge compartment or the f

46Testing Defrost CircuitsAccess the main PCB for voltage/resistance testing– With the compressor running test the sensors– Enter Forced Mode Defrost–

47Defrosting Troubleshooting Part 1• Defrost Sensors– Testing: Check the DC voltage across both evaporator defrost sensors, with the compressor runnin

48Defrosting Troubleshooting Part 2Enter the Forced Mode per instructions• Check heater circuit amperage at the Main PCB or A/C line; look for ~1.2 am

49Defrosting Troubleshooting Part 3Enter the Forced Mode per instructions• Check the heater circuit voltage at the Main PCB; should be 120VAC for Free

5Support Contact Numbers •Customer Service– 1-800-SAMSUNG (726-7864)• Authorized Service Centers Tech Assist– 866-797-8736 (account number required)–

50Defrosting Troubleshooting Part 4Heater circuit resistance - Unplug the refrigerator. Remove the defrost heater connector from PCB.• Freezer - Check

51Example of a 2600 Ω heaterDefrosting Troubleshooting

52Defrost Error SymptomsNOTE: Evaporator covers may break if removed whilefrozen as they are plastic, replace if damaged.• Ice build up in either the

53Defrosting Error Causes• The heat from the defrost heater does not transfer to the evaporator drain• The Styrofoam around the evaporator cover absor

54Defrost Circuit Modification• Metal clips “A” and “C” can be placed on both the evaporator cover and the evaporator. The metal clips will touch and

55Compressor Controller board connector arrangement and detail explanation (RM257AB*)Compressor not runningCheck for 5 minute delay-- Not in delayForc

56CN01 POWER(115VAC)CN02 OLPCN03 U V WCN04VDD VSSRPMFBModel: RFG294 **, RFG295**, RFG299** Compressor Troubleshooting Compressor not runningChe

57Chapter 4Common Refrigerator Service Issues

58No Ice - Flex Tray I/M• For the ice maker to operate properly, water pressure between 20 and 125 PSI is required. A quick test of water pressure wo

59Slow Ice - Flex Tray I/M• This problem is usually caused by a defective sensor or low water pressure. The I/M sensor will delay the time by adding e

6Regional Service ManagersHome Appliance Field Service

60Shattered Ice Cubes - Flex Tray I/M• When all ice shatters it's because of a bad tray or harvesting at a temp that is too cold (lower than 1.5

61Service Concerns-Heat Release I/M• Troubleshooting Observations• Is there any frost in the freezer compartment?• Excessive frost on the evaporator c

62Service Concerns –Heat Release I/M• Is the Ice Bucket locked firmly in position?• Try to move the bucket, when locked in place, any movement would m

63Heat Release Ice Maker - Troubleshooting• Voltage tests• The Ice Room Sensor voltage should match the actual ice room temperature; refer to the sen

64Heat Release Ice Maker - Troubleshooting• The Freezer Defrost Sensor Voltage should be 0 to -17 , with the compressor running, to show no frost/ice

65Heat Release Ice Maker - Troubleshooting• If any of the sensors measure incorrectly replace the defective sensor• The Ice Room Fan should read aroun

66RF267**, RF26VAB** Not all Connectors and pins used on all modelsCN73 A/C Load1-(CN70-1) Cube Solenoid (Yel/Red) RF267 3-(CN70-1) Auger Motor (Pink

67Model : RFG 294 **, RFG295**, RFG299** Not all Connectors and pins used on all modelsCN74 A/C Load1-(CN70-9) Cube Solenoid (Yel/Red)3-(CN70-9) Auge

68Common Defrost Problems Evaporator frozen, solid ice•Fridge– Bad evaporator cover, open drain heater, add Fixer and Plate, or blocked drain.• Freeze

69Defrost ServiceSingle Evaporator Models• Frost/Ice forming on the evaporator cover and blocking fan and air tunnel to fridge.– Install Repair Kit fo

7Be Prepared When Calling for Technical Assistance on AppliancesSlow Times: 6-9 PM EST M-F; 11-4 EST Sat. For prescreening callsThe technical assistan

70No Cool Service IssuesBoth Compartments• Unit locked in defrost mode• Compressor relay failure on main PCB• Failure of both defrost circuits• No sea

71Service Access• Disassembly of Quattro Cool Evaporator Covers, both access the same way

72Chapter 5Refrigerator Installation and Door RemovalFor additional installation details see the accompanying 2008 Installation DVD

73Water Connection- Insert the plastic water pipe hose to the existing watersource and fix it with compression hardware. If there is noexisting icemak

74Refrigerator Filter Housing DamageCoat the “O” rings here Housing may crack and leak hereAlways use the original Samsung filter when replacement is

752. Disconnect the electrical connector above the upper right door hinge and the 3 electrical connectors  above the upper left door hinge.Disconnec

76Door Removal – French Door Model4. Lift the door straight up to remove.3. Remove the 3 hex head bolts  foundattached to the upper left and right do

774. Remove a fixing pin  and remove a shaft  by pushing it to the right side with your hand.3. Take out the lower basket  by lifting the basket up

78Door Removal – Side by Side ModelIf necessary, remove the Reed S/W using a flat bladescrewdriver.Remove the Earth screw and the 3 bolts as shown.

79Door Removal – Bottom Mount Model2. Disconnect electric wire on the top of the refrigerator.3. With the 7/16 inch wrench, remove the three bolts tha

8Ref & Laundry Serial Number InformationModel Name6 3 5 5 4 3 C P 1 0 0 1 6 0 AProduction LinePro. Month1~9 : Jan~SepA : OctoberB : NovemberC : De

80Door Removal – Bottom Mount Model5. Separate Hinge from electric wire and ground wire as shown below.6. Disassemble the fridge door by lifting it up

81Door Removal – Bottom Mount Model7. Separate the Cap assembled on the Middle Hinge.RefrigeratorDoor1. After removing the screw and two bolts,disasse

82Door Removal – Bottom Mount Model3. Disassemble the Freezer door by lifting it upward. Becareful not to drop and scratch the Freezer door2. Remove/D

83Chapter 6Best Refrigerator Repair Practices

84Refrigerator Truck Stock RecommendationsPart 1• The recommended truck stock items list updated bi- monthly please check the Tech Talk Newsletter for

85Refrigerator Truck Stock Recommendations Part 2• The recommended truck stock items list updated bi- monthly please check the Tech Talk Newsletter fo

86Temp. ()Resistance()Voltage (V) Temp. ()Resistance ()Voltage (V)Temp.()Resistance ()Voltage (V)-43.6 98.9 4.54 12.2 21.4 3.41 68.0 6.01 1.88-4

9Refrigerator Model Number Nomenclature• RS = Side by Side• RF = French Door• RM = Four Door• RB = Bottom Mount Freezer