DCS rf48ss Service Manual
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DCS rf48ss Service Manual

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THE DCS REFRIGERATOR
SERVICE MANUAL
MODEL:
RF48SS

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  • Page 1 THE DCS REFRIGERATOR SERVICE MANUAL MODEL: RF48SS...
  • Page 2 PRECAUTIONS ■ PRECAUTION FOR SAFETY • Before operating the appliance, please read this manual thoroughly and retain it for your reference. • Because these following operating instructions cover various models, the characteristics of your refrigerator may differ slightly from those described in this manual. •...
  • Page 3 CAUTIONS Do not overfill the refrigerator with food. the power switch to the O (OFF). • When you opening the door, items may fall out and • Possibility of electric shock or fire. cause personal injury or material damage. Do not store things in the ventilation space. Do not put bottles or glass containers in the freezer.
  • Page 4 Remove the dust or foreign body from Housing, Assembly and conect during fixing. • Prevention of fire in case of TRACKING, SHORT Check for moisture in electro-control system. • If you find moisture in electro-control system, change the part or clean and insulate. Check the assembly condition of parts after repairs.
  • Page 5 Check if the product can clear the doors on its way to the installation place. ▶If the product is not able to clear the doors, it is not possible to install the product. Model Remark RF48SS 48” 27.8” 84” 96.8”...
  • Page 6 ● Select an installation place Check if the floor is flat. ▶If the refrigerator is installed on an uneven floor, it will cause vibration and noise. Check if the floor can support the weight of the refrigerator and the food inside (1102lb or 500kg total). ▶...

  • Page 7: Product Specifications

    Product Specifications Product Specifications RF48SS Model Name DISPENSER Tot al GROSS Freezer Room volume Fridge Room Tot al Storage Freezer Room volume Fridge Room 48” Width(mm) Dimension Height(mm) 84” Depth(mm) 27.8” Weight 574lb Rated V/Hz AC 115V / 60Hz 155kw...
  • Page 8 Product Specifications RF48SS Model Name BK190CL2X/EO2 Model Name Compressor Inverter Starting Type Oil Charge Freol α -15 (Ester) Refrigerator Split Fin Type Evaporator Freezer Fin Cross Type Step Motor Valve DC14V/ Unipolar 1-2 Phase Excitation Method Condenser Forced or Natural Convection...
  • Page 9 RF48SS Model Name F- Defrost Heater AC 115V 300W(Sheath heater) F- Drain Heater On upon F-Defrost AC 115V 35W(Cord Heater) F - SUB Drain Heater AC 115V 10W(Cord Heater) R- Defrost Heater AC 115V 110W(Heater Pipe) On upon R-Defrost R -Drain Heater...

  • Page 10: Product Dimension

    Product Dimension DOOR 90 OPEN MODEL 83.4”min 84”min RF48SS 48” 47” 24.8” 25.6” 44” 52” 40.8” 42.9” 13.6” 20.3” 27.8” 84.2”max 84.8”max...
  • Page 11 PART PART NAME CODE REMARKS ANTI-TIP DA61-01589A BRACKET Cap support filter DA99-00466A Filter DA29-00003B Water line DA97-00753A Tapping Screw 6002-000213 Clip A DA65-20110B Sealing Tape 0203-000399...
  • Page 12 Refrigeration Cycle COMPRESSOR SUB-CONDENSER PIPE DRYER FRE/REF/HOT PIPE REF CAPILLARY TUBE REF EVAPORATOR FRE CAPILLARY TUBE FRE EVAPORATOR REF EVAPORATOR FRE EVAPORATOR COMPRESSOR REF CAPILLARY TUBE FRE CAPILLARY TUBE(RED) DRYER CONNECTOR CAPILLARY FREEZER COMPARTMENT FRIDGE COMPARTMENT SUB-CONDENSER PIPE...

  • Page 13: Cold Air Circulation

    Cold Air Circulation FREEZER FAN FRIDGE FAN REF EVAPORATOR FRE EVAPORATOR FRIDGE COMPARTMENT FREEZER COMPARTMENT FRONT VIEW...

  • Page 14: Basic Refrigeration Cycle

    REFRIGERATION CYCLE BASIC REFRIGERATION CYCLE...
  • Page 15 Actual Refrigerant Pipe...
  • Page 16 1. Principles of the Cold Cycle 1) Compressed Stroke (Adiabatic Compression) Low temperature and pressure gas absorbed from the evaporator is compressed rapidly by the piston, the work applied to the gas will be changed into heat and the gas becomes high temperature and pressure.
  • Page 17 ※ Location: ① Cluster Radiating Type: It releases heat through the pipes in the front right and left inside of the refrigerator to release heat to all over the cabinet, which is good for heat radiation and foamed with rigid urethane, ②...
  • Page 18 2. Types A. Reciprocal Movement Type: It compresses by shifting the motor rotation to the reciprocal movement of the piston with the shaft and the cylinder. ※It is used for home refrigerators. B. Rotary Type: It inhales and compresses the refrigerants in the air gap between the rotator and the cylinder attached in an eccentric way to the rotary axis.
  • Page 19 ■ Accumulator 1. Roles: It removes the liquid refrigerant from the evaporator completely to send only the pure gas refrigerant to the compressor. ※ A liquid refrigerant to the compressor can cause its overload. 2. Structure: The liquid refrigerant which is vaporized from Gas Refrigerant the evaporator will flow into the accumulator.

  • Page 20: Product Function

    PRODUCT FUNCTION Grill Panel Button & Display Panel It shows the set functions. Freezer Door Dispenser It supplies drink water via a water filter and ice cubes made by the ice maker.
  • Page 21 Fridge Door Door Handle...

  • Page 22: How To Store Food

    HOW TO STORE FOOD Ice Bin It stores ice cubes made by the ice maker. Do not store other food except ice cubes. Winter Closet You can store frozen pizzas Freezer Compartment Shelf You can store various kinds of frozen food such as meat, fish and ice creams.
  • Page 23 Dairy Bin You can store dairy products such as butter and cheese. Fridge Compartment Shelf Please put dishes or refrigerated foods with enough space between items. Fridge Door Bin You can store small packaged refrigerated food and beverages such as milk, fruit juice and beer.

  • Page 24: How To Control Temp

    HOW TO CONTROL TEMP ■ How to control freezer temperature To control the freezer temperature, follow the procedures below. QUICK ICE Press the [ FRE. TEMP ] button. ▶ Freezer temperatures can be adjusted between -8℉ and 14℉ with an interval of 2℉.
  • Page 25 ■ How to control fridge temperature To control the fridge temperature, follow the procedures below Press the [ REF. TEMP ] button. ▶ fridge temperatures can be adjusted between 34℉and 46℉with an interval of 2℉. At this time, the temperature indication bars will be illuminating, showing the temperature range (MAX, MID or MIN).

  • Page 26: Fresh Island

    Fresh Island ■ Function selection QUICK NORMAL LOCK FREEZE COOL FRESH When SUB FREEZE is selected ▶ When SUB FREEZE is selected, the temperature of the Fresh Island will be set to 23℉ and the temperature of the fridge compartment will be maintained at 23℉...
  • Page 27 ■ Function selection When NEO FRESH is selected ▶ When NEO FRESH is selected, the temperature of the Fresh Island will be set to 30℉ and the temperature of the fridge compartment will be maintained at 30℉ regardless of its temperature setting. ▶...

  • Page 28: Ice-Maker Function

    ARRANGEMENT AND ADJUSTMENT 1) Machine Compartment Fan Motor Delay Function ● This refrigerator is programmed to control its temperature automatically inaccordance with the ambient temperature.The Compressor Cooling Fan (Machine Compartment Fan)is controlled according to the ambient temperature. ※ Refer to the bleow for ambient temp range and cooling fan operation. Temperature Range Load Operation State Above 51.8℉(11℃)
  • Page 29 ② ② WATER SUPPLY FUNCTION ▶ It is an operation that water is supplied to the ice tray using a solenoid valve connected directly to the water line when ice ejection is completed. 1) When the ejection arm is in the horizontal state and the completion of the ejection operation, operate the water solenoid valve with a Time check function to supply water to the ice tray.

  • Page 30: Defrost Function

    3) Defrost Function 1) F/R-Room Defrost depends on the accumulated comp-on time. 2) With the initial power on,defrost starts at the both rooms after 4 hour accumulated comp-on time. 3) Defrost cycle is changed automatically from MIN 5 hours to MAX 10 hours. 4) The defrost cycle depends on the ambient temperature,the frequency of F/R- Door open,and the duration of F/R-Door Open.
  • Page 31 5) Load Status Display Function 1) When pressing the POWER FRE. and the POWER REF. buttons simultaneously for about 6 seconds during normal operation,the F/R-Room temperature LCD blink for 2 seconds at an interval of 0.5 sec on/off.. At this point,when taking your finger off the POWER FRE. and the POWER REF. buttons and pressing the REF.
  • Page 32 Details of Load Status Light Display by Position Items DISPLAY LED T r o u b l e s h o o t i n g FRIDGE SEGMENT The relevant segment LED comes on when the R- FAN HIGH operates. R-FAN HIGH FRIDGE SEGMENT...
  • Page 33 7) Test Function (Forced Operation/Forced Defrost) ● When pressing the REF. TEMP Temp Control button and the POWER FRE button on PANEL P.C.B at the same time for more than 8 seconds,all LEDs on the display go out and it goes into the Test function.You can use any of F/R-Room buttons, POWER FRE button and POWER REF button as a Test button.

  • Page 34: Self-Diagnosis Function

    8) Self-Diagnosis Function Press for 8 seconds simultaneously QUICK ICE ① Self--Diagnosis with Initial Power On 1) With power on,MICOM checks the temperature sensors for errors in a second. 2) A defective sensor is found by self-diagnosis,relevant display LED segments willfalsh on and off at intervals of 0.5 sec. there will be no beep sound .Even though sensor has a defect,the system will operate emergency mode.
  • Page 35 Details of Self-Diagnosis Light Display by Position Items DISPLAY LED Trouble shooting Remarks FRIDGE SEGMENT Displaying a defect when the R- Sensor Housing slip-out from the R-SENSOR R-Room,Contact Failure,Wire Cut,Wire Sensor temp is over 149℉(65℃) Short,Defective R-Sensor. or below -58℉(-50℃). FRIDGE SEGMENT Defrost Sensor Housing slip-out from the...

  • Page 36: Option Setting Function

    9) Option Setting Function ● When pressing the FRE. TEMP and the POWER REF. buttons simultaneously for 12 seconds,the Display is converted to the Option Setting mode. Press simultaneously for 12 seconds QUICK ICE ① For example,if you want to shift the standard temperature of the Freezer by -3℉, follow the procedure. This function is to change the standard temperature.If the F-Room is set to 0℉...
  • Page 37 Note All the data for the Option is cleared before leaving the factory. All the setting values are "0" However,some units can have different setting values for the purpose of quality improvement during mass production.Please make sure to check the Quality Information. POWER FRE.
  • Page 38 ■ The following options are applied only to the models with Ice Maker (Dispenser-model). ③ This is the option controlling the quantity of the automatic water supply ⑤ This is the option to change the standard temperature of Ice Maker Sensor. with the Flow Sensor controlling water quantity to Ice Maker.

  • Page 39: Leg Cover

    How to Disassemble Each Component for A/S Make sure to turn the refrigerator off before disassembling the components as shown below. 1) The descriptions of external parts are illustrated in the figure below,and the methods of disassembling the parts are indicated in order for you to refer to the relevant page, assigned to each number below.
  • Page 40 Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① Disassemble circled Tray Dispenser, disassemble the Cover turning the two screw DISPENSER- counter-clockwise, Dispenser COVER pushing and lifting up. ② Disassemble the connector like figure 2. ①...
  • Page 41 Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① Disassemble Turning the two screw DISPENSER– counter-clockwise, BULB Lamp Cover like figure, ② now it is possible to change Bulb. ① Disassemble the 7screws at the side.

  • Page 42: Fridge Door

    Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ⑦ Disassemble the circled fixing screw for Water Line. FREEZER ⑧ Push the inner coupling DOOR using one hand and pull out Water Line from the coupling using the other hand.

  • Page 43: Interior Overview

    Make sure to turn it off before disassembly. Risk of electric shock. 6-2-2. Interior Overview The descriptions of internal parts are illustrated in the photo below and refer to the pages below for disassembling each part. For the parts not illustrated in the photo, refer to the exploded view. Description Page Description...
  • Page 44 Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① Hold the bottom of the left long slot with your Ice Storage Bin hand, lift up and pull forward to remove it. ① Flip the cover up and push it back to the R-Room –...

  • Page 45: Ice Maker

    Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① Remove the Ice Storage Bin then lift up the cover of Winter Closet to the direction of the arrow mark to remove. (Insert the spring into its seat when assembling it again.) ②...
  • Page 46 Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ② After removing the housing Disassemble Housing from the left wall and the sensor housing on the upper side,pull the evaporator cover out as shown in the photo.
  • Page 47 Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① F-Room Evaporator –After removing the Fan Motor Ass’y as shown in the photo, F-Room remove the clamp screw Evaporator – holding the evaporator. Defrost ②...
  • Page 48 Make sure to turn it off before disassembly. Rrisk of electric shock. PART NAME DESCRIPTION FIGURE ① Refer to the first three steps of the F-Room Evaporator to pull the upper duct out. ② Refer to the F-Room –Interior Lamp to remove the lamp cover. ③...
  • Page 49 Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① Fresh Island –Refer to how to remove the Damper to disassemble the rear water cover and the connecting Fresh Island duct,remove the Fan and its –Fan trim from the retaining hook.
  • Page 50 Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① Right figure displays MACHINE the Machine COMPARTMENT Compartment. ① Open the Assy-Grille and remove Assy-cover comp. ② Remove gas struts from the stud by loosening ASSY-GRILLE, the clip of the strut GAS SPRING...
  • Page 51 Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① Disassemble circled 2 screws. PCB-BOX : ② Pull out Condenser from PCB-BOX. CONDE NSER ※ Be careful do not change the terminals during assembly. ①...

  • Page 52: Water Valve

    Make sure to turn it off before disassembly. Risk of electric shock. PART NAME DESCRIPTION FIGURE ① Remove the 2 screws over the Ice Maker and the power core housing, pull the Ice Water Supply Clip HEATER- Maker Kit forward to WATER PIPE disassemble.

  • Page 53: Self Diagnosis

    Self Diagnosis Case Output Terminal (The Main PCB and the Case Output Terminals are connected with wire connectors.) *Test the terminals on the PCB Case to check for voltage or operation related errors concerning QUEEN PJT.The terminal composition is shown in the diagram. If an error is found while testing the above terminals and the housing connectors,check the inside of the PCB Case.
  • Page 54 5-1. How to run Test Mode 1.When the refrigerator is not turned on AC115V DC160V AC115V...
  • Page 55 2.When the compressor does not operate Refer to Test Function in this manual Is the Freezer sensor normal? 200~400Hz 50% Duty Is IC2 # 35 high(2.5V)? Open and repair the Signal generated Connection state Replace Micom and PCB Is the Temp sensor of Main PCB normal? Is the connector of Main and Inverter normal?
  • Page 56 3. When Defrost does not operate ℉ ℉ ℉...
  • Page 57 4. When error is detected by Self-Diagnosis (Sensor Error)
  • Page 58 5. When the alarm sound will not turn off.
  • Page 60 6. When there is fault in the display and communication error...
  • Page 61 7. When Fan does not operate...
  • Page 62 8. When Fresh Island does not operate properly (Only applied to Fresh Island Model)
  • Page 63 9. When F/R-Room Lamp does not light up 115V 115V...
  • Page 64 10. When the Dispenser Lamp does not light up Caution 1. There is a possibility of electric shock, make sure to start repairing after turning off the power. 2. The lamp is a incandescent bulb which generates high heat, make sure not to get burn. START Is the lamp filament broken?
  • Page 65 11.When Cover Ice Route Motor (Geared Motor)does not operate properly Caution...
  • Page 66 12. When Water Valve does not operate 115V...
  • Page 67 13. When CRUSHED or CUBED does not operate properly 115V 115V 115V...

  • Page 68: Block Diagram

    BLOCK DIAGRAM...

  • Page 69: Wiring Diagram

    WIRING DIAGRAM...

  • Page 70: Parts Description

    PARTS DESCRIPTION 10-1. PARTS DESCRIPTION (MAIN) ⑧ ⑮ ⑮ ⑤ ⑪ ⑨ ⑬ ④ ③ ① ⑬ ⑦ ⑮ ⑥ ① ① ⑫ ⑭ ① Power -. Power supply for the product from SMPS ② MICOM Periphery Circuit -. Oscillator & Reset circuit for MICOM controlling ③...
  • Page 71 10-2. PARTS DESCRIPTION (SMPS & INVERTER) Convert AC inputs into DC voltages (5V, 12V) for the refrigerator control.

  • Page 72: Circuit Diagram

    CIRCUIT DIAGRAM ● ● CIRCUIT DIAGRAM (MAIN) POWER SUPPLY MICOM PERIPHERY CIRCUIT LCD PANEL COMM CIRCUIT CONVERTIBLE ROOM CTL CIRCUIT SENSOR AND SWITCH PERIPHERY CIRCUIT AC LOAD CTL CIRCUIT EEPROM INVERTER CTL CIRCUIT MICOM PERIPHERY CIRCUIT STEP MOTOR DRIVING CIRCUIT FAN DRIVING CIRCUIT ICE-MAKER...

  • Page 73: Circuit Description

    CIRCUIT DESCRIPTION 12-1. CONNECTOR ARRANGEMENT DESCRIPTION (MAIN) 1. F-DOOR S/W 1. F-FAN OP SIGNAL 1~2. DAMPER HEATER 1. C-FAN OP SIGNAL 2. R-DOOR S/W 2. F-FAN OP VOLTAGE 3~6. DAMPER MOTOR 2. C-FAN OP VOLTAGE 3. ICE ROUTE S/W1 3. GND 7~8.
  • Page 74 12-2. CONNECTOR ARRANGEMENT DESCRIPTION (SMPS & INVERTER) 1. COMP U PHASE INPUT AC 240V 2. COMP V PHASE 3. COMP W PHASE COMPRESSOR RPM SIGNAL COMPRESSOR 1. 5V 2. GND 3~4. 12V VOLTAGE INPUT AC 240V...

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