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Daewoo FRS-U20IV Service Manual
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Daewoo FRS-U20IV Service Manual

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Refrigerant Type
(R-134a)
Refrigerant Type
(R-600a)
Refrigerant Type
(R-134a)
Refrigerant Type
(R-600a)
Caution
In this manual, some parts can be changed for improving their performance without notice.
So, If you need the latest parts information, please visit and refer to PPL (Parts Price List) ]
in Service Infromation Center. ( http://svc.dwe.co.kr )
S/M No:
Refrigerator
FRS-U20IV..
FRS-U20BV..
FRN-U20IV..
FRN-U20BV..
FRS-U20DV..
FRS-U20FV..
FRN-U20DV..
FRN-U20FV..
Aug. 2011.

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Summary of Contents for Daewoo FRS-U20IV

  • Page 1 S/M No: Refrigerator Refrigerant Type FRS-U20IV.. FRS-U20BV.. (R-134a) Refrigerant Type FRN-U20IV.. FRN-U20BV.. (R-600a) Refrigerant Type FRS-U20DV.. FRS-U20FV.. (R-134a) Refrigerant Type FRN-U20DV.. FRN-U20FV.. (R-600a) Caution In this manual, some parts can be changed for improving their performance without notice. So, If you need the latest parts information, please visit and refer to PPL (Parts Price List) ] in Service Infromation Center.

  • Page 2: Specifications

    SPECIFICATIONS 1. Specification Buyer No. U20IV.. U20BV.. U20DV.. U20FV.. Factory No. FRU-57VI.. FRU-57VB.. FRU-54VD.. FRU-54VF.. Dispenser Feature H/Bar Total Gross Vol. Freezer (ISO 15502) Refrigerator Total Storage Vol. Freezer (ISO 15502) Refrigerator Width (mm) Diemension 730.5 Depth (mm) 1790 Height (mm) Weight (kg) R-600a or R-134a Refrigerant Type...
  • Page 3 SPECIFICATIONS 2. External Size...
  • Page 4 SPECIFICATIONS 3. Interior Parts 3-1. Basic Models 1) Freezer Pocket 2) Freezer Shelf 3) Freezer Lamp ( 25W x 1ea ) 4) Ice Tray 5),6) Freezer Case 7) Refrigerator Lamp ( 25W x 2ea ) 8) Refrigerator Shelf 9) Egg Tray 10), 11) Refrigerator Case 12) Refreshment Pocket 3-2.
  • Page 5 FUNCTIONS ( DISPLAY_Inner Basic Model ) 1. Display ( Inner Basic Model ) Temperature adjustment button for freezer compratment Temperature adjustment button for refrigerator compratment 2. Display Control Cotrol Temp. Display (Set Temp.) Initial Mode : Freezer / Refrigerator set medium ( 3 / 3 ) 3.
  • Page 6 FUNCTIONS ( DISPLAY_Basic Model ) 1. Display ( Basic Model ) Temperature adjustment button for freezer compratment Super(Quick) freezer compartment button Super(Quick) refrigerator compartment button Temperature adjustment button for refrigerator compratment 2. Display Control Cotrol Temp. Display (Set Temp.) Initial Mode : Freezer / Refrigerator set medium ( -19C / 4C) SUPER FRZ, SUPER REF.
  • Page 7 FUNCTIONS ( DISPLAY_Dispenser Model ) 1. Display ( Dispenser Type ) Temperature adjustment button for freezer compratment Super(Quick) freezer compartment button Reset water filter button after exchanging the filter Dispenser selction button. ( Water / Cubed ice ) Ice maker lock button Children lock button ( Hold 3 sceconds ) Temperature adjustment button for refrigerator compratment Super(Quick) refrigerator compartment button...

  • Page 8: Reset Water Filter

    FUNCTIONS ( DISPLAY_Dispenser Model ) 5. REF. SET button 1) Temperature control of refrigerator compartment 2) Initial power plug in : Medium ( 4C ) - Every time you press the REF. SET button, the setting temperature changes below order. 6.
  • Page 9 FUNCTIONS ( TEMPERATURE CONTROL ) 1. Freezer Compartment Control 1) Adjust by the pushing the FRZ.SET button. 2) Compressor & Freezer Fan controlled by each mode ON/OFF point. 3) Freezer Compartment ON/OFF Difference : 2C - MEDIUM OFF point : -19C - When Room Temperature (RT) is below 13C, Freezer sensor OFF point 2C up ( so, MEDIUM OFF : -17C ) 4) Control Temperature Point in Each Mode Division...

  • Page 10: Normal Mode

    FUNCTIONS ( TEMPERATURE CONTROL ) 1. Freezer Compartment Control 1) Adjust by the pushing the FRZ.SET button. 2) Compressor & Freezer Fan controlled by each mode ON/OFF point. 3) Freezer Compartment ON/OFF Difference : 2C - MEDIUM OFF point : -19C - When Room Temperature (RT) is below 13C, Freezer sensor OFF point 2C up ( so, MEDIUM OFF : -17C ) 4) Control Temperature Point in Each Mode Division...

  • Page 11: Max Mode

    FUNCTIONS ( TEMPERATURE CONTROL ) 2. Refrigerator Compartment Control 1) Adjust by the pushing the REF.SET button. LOW - MEDIUM LOW - MEDIUM - MEDIUM MAX - MAX 2) Refrigerator Fan controlled by each mode ON/OFF point. 3) Refrigerator Compartment ON/OFF Difference : 0.5C - MEDIUM OFF point : 5.2C - When Room Temperature (RT) is below 13C, Refrigerator sensor OFF point 2C up ( so, MEDIUM OFF : 7.2C ) 4) Weak Cooling Prevention Function...
  • Page 12 FUNCTIONS ( Defrost Mode ) 1. When Defrost Mode start? ; When total Compressor runnig time becomes at 6, 8, 10, …, 24hours. - The compressor runing rate is over 85% every 2 hours. - Door opening time is over 2 minutes ( Each Freezer / Refrigerator door ) - Total compressor running time ( on time + off time ) is 60hours.
  • Page 13 FUNCTIONS ( Defrost Mode ) 2. Normal Defrost Mode 1) PRECOOL PRECOOL - Compressor runs ( to cool down the freezer compartment prior to heater switch on ) for 50minutes or until Freezer sensor temperature reaches -27C 2) HEATER DEFROSTING HEATER - Defrost heater is switch on until Defrost Sensor temperature reaches 13C.
  • Page 14 FUNCTIONS ( Error Display_Basic Model ) 1. How to enter this check mode ; Press the FRZ. SET button 5 times while pushing the REF. SET button. 2. The Front LED displays the current error code ( if happens ). 3.
  • Page 15 FUNCTIONS ( Error Display_Basic Model ) 5. Troubleshooting when error happens ( If the relative parts is normal, Error code display will be reset. ) 1) Freezer sensor error - Cause : Freezer sensor disconnection or short. - Check point : Measure the resistance between both terminals after separating CN9 of the Main PCB. If sensor is disconnected or short, change that in the freezer compartment.
  • Page 16 FUNCTIONS ( Error Display_Basic Model ) 1. How to enter this check mode ; Press the SUPER FRZ. button 5 times while pushing the FRZ. SET button. 2. The Front LED displays the current error code ( if happens ). ;...
  • Page 17 FUNCTIONS ( Error Display_Basic Model ) 5. Troubleshooting when error happens ( If the relative parts is normal, Error code display will be reset. ) 1) Freezer sensor error - Cause : Freezer sensor disconnection or short. - Check point : Measure the resistance between both terminals after separating CN9 of the Main PCB. If sensor is disconnected or short, change that in the freezer compartment.
  • Page 18 FUNCTIONS ( Error Display_Dispenser Models ) 1. How to enter this check mode 1) Press the LOCK button. 2) Press the Super Freezer button 5 times while pushing the Freezer Set button. 2. The Front LED displays the current error code ( if happens ). ;...
  • Page 19 FUNCTIONS ( Error Display ) 5. Troubleshooting when error happens ( If the relative parts is normal, Error code display will be reset. ) 1) F1 error - Cause : Freezer sensor disconnection or short. - Check point : Measure the resistance between both terminals after separating CN15 of the Main PCB. If sensor is disconnected or short, change that in the freezer compartment.
  • Page 20 FUNCTIONS ( Error Display ) 7) EF error - Cause : When Flow-sensor abnormal. ( There is no pulse during some time. ) The number of pulse signal is below 10 by 1 second during water supply. - Check point : Water supply line. 8) Et error - Cause : Level switch abnormal.
  • Page 21 FUNCTIONS ( Ice Maker_ Dispenser Model) 1. Ice making flow Start - water freezing Making the Ice water supply stand by Ice separating - Ice tray rotation to separate ice cubes - water supply to ice tray Water supply Water supply - check if water supply complete or not check 1) Press Test switch ( which is under the ice tray ) for more than 1 second and then test starts.
  • Page 22 FUNCTIONS ( Ice Maker_ Dispenser Model) 2. Ice making mode Start Ice sensor is below 130 minutes pass -9.5C Ice sensor is over 15 minutes pass -12.5C Ice separating 1) If Ice sensor temperature is below -12.5C after 130minutes, ice making completes. 2) If Ice sensor temperature keep below -9.5C for 15 minutes ice making complete, although the sensor is not below -12.5C 3) After 4.8hours ice making complete, when ice sensor is abnormal, 3.
  • Page 23 FUNCTIONS ( Ice Maker_ Dispenser Model) 4. Water supply mode 1) If water supply mode starts, the water valve is ON. 2) When Flow sensor is abnormal, supply mode controlled by the time. 3) Factor value is variable when After sales action. ( Adjust water quantity ) - Normal Water flow pulse setting is 238.
  • Page 24 FUNCTIONS ( Dispenser Control_Dispenser Model ) 1. Water / Crushed Ice / Cubed Ice Select button 1) Default mode is Water The selection order is Water - Cubed Ice - Water. 2) In each mode the selected is active by the dispenser button press. 2.
  • Page 25 FUNCTIONS 1. Prevention compressor restart function Although Freezer sensor temperature is low, compressor doesn't restart for 6 minutes from compressor OFF. 2. Beep funtion 1) When pushing the button on the Front Control Pannel. 2) When initail power input. ( 4 beeps after 3 seconds. ) 3) When Forced Deforst Mode starts ( 3 beeps ), Pull Down Mode Starts ( 1 beep ).
  • Page 26 FUNCTIONS 5. Weak Cooling Trouble Shooting ; Adjust refrigerator sensor OFF point - Normal sensor resistance. (31.4kohm) - Cut the J18 and increase sensor resistance. (33.4kohm) - Cut the J18, J19 and increase resistance. (35.4kohm) Weak Cooling happens Option Normal 1.5C down 3.0C down...
  • Page 27 FUNCTIONS 6. Pull Down Mode 1) How to start ( Inner Basic Model ) ; Push the Freezer door switch 5 times while pushing the FRZ. SET button. ( Basic Model ) ; Push the SUPER FRZ. 5 times while pushing REF.SET. ( Dispenser Model ) ;...

  • Page 28: Functions ( Summary )

    FUNCTIONS ( Summary ) 1. Inner Basic Model Mode How to enter Forced Defrosting FRZ. SET + REF. SET 5 times Pull Down REF. SET + Freezer door switch 5 times Error Display REF. SET + FRZ. SET 5 times 2.
  • Page 29 WIRING DIAGRAM ( Refrigerant : R-134a Type ) 1. Inner Basic Model 2. Basic Model 3. Dispenser Model...
  • Page 30 WIRING DIAGRAM ( Refrigerant : R-600a Type ) 1. Inner Basic Model 2. Basic Model 3. Dispenser Model...
  • Page 31 HOW TO CHECK EACH PART 1. Hose Ice maker Tube Assembly. (Dispenser Models Only) 1) Disassembling Procedure Procedure Procedure Pull forward Ice Storage Case. Unscrew to remove Cover Guide Cab. Remove 2 screws. Disassemble Guide Cab Water Tube A As. Pull Ice Maker Pull Hose Ice Maker Tube As.
  • Page 32 HOW TO CHECK EACH PART 2. Bracket Geared Motor Assembly (Dispenser Models Only) 1) Disassembling Procedure Procedure Procedure Remove 2 screws. Check solenoid Motor. And unscrew 4 points. Separate 6 pin connector of Geared Motor. 2) How to check the Hose Ice Maker Tube As. Parts How to Check Remark...
  • Page 33 HOW TO CHECK EACH PART 3. Dispenser Micro Switch (Dispenser Models Only) 1) Disassembling Procedure (Features are model dependent) Procedure Procedure Insert (-) screw driver into bottom hole of Pull out the Micro Switch. ( Be careful not to damage the hook. ) Dispenser Button and pull up.
  • Page 34 HOW TO CHECK EACH PART 4. Dispenser Solenoid Valve (Dispenser Models Only) 1) Disassembling Procedure (Features are model dependent) Procedure Procedure Disassemble the Cover dispenser Box As Disconnect 2 terminals and 2P Wire. Separate Front PCB connector. (Features are model dependent ) (Features are model dependent.) Unscrew and remove Solenoid Valve.
  • Page 35 HOW TO CHECK EACH PART 5. Ice Maker (Dispenser Models Only) 1) Disassembling Procedure Procedure Procedure Full Ice Sensor Level Sensor Remove 2 screws. Remove full ice sensor and level sensor. Pull out the Ice Maker. Unscrew 3 points. Drop Motor Unscrew Fixture of Frame Ice Maker.
  • Page 36 HOW TO CHECK EACH PART 2) How to check Ice Maker Parts How to check Remark ( Good ): 6 ~ 14 ohm ( If defective) : Change the motor Ice Drop Motor Check resistance between 2 wires. ( Good ): 4.4 ~ 50 kohm ;...

  • Page 37: Troubleshooting

    TROUBLE SHOOTING 1. Faulty Start ( Lights OFF, Front PCB Power Dead ) Start Power plug or fuse is connected? Chage the plug or Fuse 1st power of SMPS is ON? Check the plug connection from compressor room and to CN1 of Main PCB Main PCB Fuse is connected?
  • Page 38 TROUBLE SHOOTING 2. Freezing failure ( Weak cooling ) Start Error CODE happens Refer to Error display in Funtion page Does compressor operate? Check the Relay wire, OLP and PTC Freezer/Compressor Change the relative Motor Fan Motor cooling Fan Change Main PCB Wire is connected? Check lead wire Temperature Fuse is...
  • Page 39 TROUBLE SHOOTING 3. Ice formation on Freezer Louver Start Dews form on the Gasket has a gap Remove the gap gasket surface Door hang down? Reassemble the door Door opening is too Door opening is too frquently? Explain not to open too frequently Heat appliance are too close?
  • Page 40 TROUBLE SHOOTING 4. Disconnection / Breaking of Interior Lights Wire 4-1. Freezer Door Start Freezer light filament is disconnected or breaking? Change the light bulb Connection of Freezer door switch Repair Door Switch Check the Door Switch connection and light socket 4-2.
  • Page 41 TROUBLE SHOOTING 6. Dews on Refrigerator Compartment Start Dews form on the Gasket has a gap Remove the gap gasket surface Door hang down? Reassemble the door Door opening is too Door opening is too frquently? Explain not to open too frequently Heat appliance are too close?
  • Page 42 TROUBLE SHOOTING 5. Refrigeration failure ( Foods does not get cool or cold soon ) Start Error CODE happens Refer to Error display in Funtion page Refirgerator motor Change the relative Motor Fan Motor operates? Change Main PCB Wire is connected? Check lead wire Refrigerator sensor Refrigerator sensor...
  • Page 43 TROUBLE SHOOTING 7. Cold of Vegetable Case Start Temperature setting Change to 'MIDDLE' mdoe Check Valve Repair or change the new Any Refrigerator Sensor is ok? Repair or change the new sensor Error? Check sensor connection (Check the connector to Main PCB) 8.
  • Page 44 TROUBLE SHOOTING 8-2. Refrigerant Flow Sound Start Water flowing or Attach an absorber gum hiss sounds? on the capillary tube Hiss or sizzling sound Apply a gum on the when comprssor starts accumulator Any shaking sound from Fasten the evaporator tightly Freezer compartment when not to touch liner surfaces.
  • Page 45 TROUBLE SHOOTING 8-4. Pipe Noise Start Pipes are touching in the machine (compressor) compartment? Separate the touching pipes, if any.. Tray drip makes noise by condenser shaking? Apply cushion matterial between compressor base and tray drip. Pipe itself is shaking much? Move or change the points of vibration absorber rubbers on the...
  • Page 46 TROUBLE SHOOTING 9. Door opening alarm continues after closing Start Check if interior light is ON Door switch pushing well? Attach a thin pad on the door liner or change the door assmbly. Door switch is soaked with water or there is water in the switch? Change the door switch PCB input is OK?

  • Page 47: Installation

    COOLING CYCLE HEAVY REPAIR 1. Summary of Heavy Repair Process Contents Tools Remove Cut charging pipe ends (Comp. & Dryer) and refrigerant Nipper, side cutters discharge refrigerant from drier and compressor. Residuals Confirm refrigerant (R-134a or R-600a) and oil for compressor and drier.

  • Page 48: Cooling Cycle Heavy Repair

    COOLING CYCLE HEAVY REPAIR 2. Precautions During Heavy Repair Items Precautions Use of tools. - Use special parts and tools for R-134a or R-600a. 1) Remove retained refrigerant more than 5 minutes after turning off a refrigerator. (If not, oil will leak inside.) Removal of retained 2) Remove retained refrigerant by cutting first high pressure side refrigerant.
  • Page 49 COOLING CYCLE HEAVY REPAIR 3. Practical Work for Heavy Repair Items Precautions 1. Removal of residual 1) Remove residual refrigerant more than 5 minutes later after refrigerant. turning off the refrigerator. ( If not, compressor oil may leak inside.) 2) Remove retained refrigerant slowly by cutting first high pressure side (drier part) with a nipper and then cut low pressure side.
  • Page 50 COOLING CYCLE HEAVY REPAIR Items Precautions * Pipe Connection Connect a red hose to the high pressure side and a blue hose 3.Vacuum degassing to the low pressure side. * Vacuum Sequence Open 1,2 valves and evacuate for 40 minutes. Close valve 1.
  • Page 51 COOLING CYCLE HEAVY REPAIR Item Precautions 4.Refrigerant charging 4) Refrigerant Charging Charge refrigerant while operating a compressor as shown above. 5) Pinch a charging pipe with a pinch-off plier after completion of charging. 6) Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test on the welded parts.
  • Page 52 COOLING CYCLE HEAVY REPAIR Brzing Reference Drawings...
  • Page 53 Water System for Dispenser Model Part Code Part Name Specification 3014454520 PIPE CONN C 3019503200 TUBE WATER A LDPE, (OD)1/4" X L5000 3019974100 S/PART WATER FILT FR-S650CD 3019503300 TUBE WATER B LDPE, (OD)1/4" X L1500 3015402330 VALVE WATER AS FRU-54QD 3012519212 GUIDE CAB W/TUBE A AS FRU-541D,L1525...

  • Page 54: How To Install Water Line ( Dispenser Models Only )

    How to install water line ( Dispenser models only )
  • Page 55 How to install water line ( Dispenser models only )
  • Page 56 FRU 54, R 600a 3011446001 3013224800 3012519210 3011444100 3011202000 3019974800 3012924004 3012923902 3010658002 3013064200 3011447230 COVER CAB BRKT AS COVER+VINYL(DAEWOO) 3019974020 S/PART W/TUBE AS W/DISPENSER EXPORT MODEL - Some parts can be chaged for improving their perfomance without notice. Date mendment Note...
  • Page 57 SWITCH P RELAY AS 3018129600 265RHB,S330 (MK183Q-L2UB) 3018129810 308NHB,S330 (HPL30YG) 3018129650 232NFB,330M (DG125E11) 3811400503 COVER RELAY HPL30YG-5 DAEWOO COMP. 3012610000 CLAMP BAND RELAY 3811402100 3811402100 MK183 Se ies SAMSUNG COMP MK183 Series SAMSUNG COMP. COVER RELAY 3001410000 DG125E11RAW5 PANASONIC COMP.
  • Page 58 Refrigerator Compartment Q'ty Inner Basic Basic Dispenser PART-CODE PART NAME SPEC. 3012205001 FRAME CHECK VALVE AS FR-S580CG 3012024200 FIXTURE MOTR AS 62-1 3015916000 MOTOR R FAN D4612AAA20 62-2 3011835410 FAN R PP OD3.17XD95 3011495100 COVER DAMP AS FRU-541D 63-1 3014807100 SENSOR R AS PBN-43B 3011492800...
  • Page 59 Freezer Compartment Q'ty PART-CODE PART NAME SPEC. Basic Dispenser 3012514512 GUIDE CASE A *L AS FR-S580EG(PP) 3012514612 GUDIE CASE A *R AS FR-S580EG(PP) 3012529712 GUIDE CASE C *L AS 3012529812 GUIDE CASE C *R AS 3012529010 GUIDE DRN EGI SCRAP T0.4*W248*L140 3011186310 CASE ICE PP+PRINT...
  • Page 60 Freezer Door Q'ty Inner Basic Basic Dispenser PART-CODE PART NAME SPEC. 3019026700 POCKET F *T HIPS 3019026600 POCKET F HIPS 3019027401 POCKET F AS FRU-541D 30000604E0 FRU-57VI(TITANIUM ELLIO) 30000604F0 FRU-57VI(DE WHITE) ASSY F DR 30000606C0 FRU-54VD/F, TITANIUM ELLIO 30000606D0 FRU-54VD/F, DE WHITE 136-1 3012318830 GASKET F DR AS...
  • Page 61 Refrigerator Door Q'ty PART-CODE PART NAME SPEC. Basic H/Bar 3010339100 BASE HNDL *T HIPS 3010339200 BASE HNDL *U HIPS 3012640900 HANDLE F/R AS FR-S580DVB 3011636010 DECO HANDL F/R ABS(NO SPRAY) 3019026800 POCKET R HIPS 3019026900 POCKET R *S FRU-571I 30000607B0 FRU-54VF(TITANIUM) 30000607C0 FRU-54VF(DE WHITE)

This manual is also suitable for:

Frn-u20ivFrs-u20bvFrn-u20bv