Daewoo C-UD121DCEPB Service Manual
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Daewoo C-UD121DCEPB Service Manual

Daewoo C-UD121DCEPB Service Manual

Drum washing machine
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Service Manual
Drum Washing Machine
Model: C-UD121DCEPB
Caution
: In this Manual, some parts can be changed for improving,
their performance without notice in the parts list. So, if you
need the latest parts information, please refer to PPL(Parts
Price List) in Service Information Center (http://svc.dwe.co.kr).
S/M No. : CUD121DC01
Apr. 2008

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  • Page 1 S/M No. : CUD121DC01 Service Manual Drum Washing Machine Model: C-UD121DCEPB Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr).

  • Page 2: Table Of Contents

    DRUM WASHING MACHINE SERVICE MANUAL 1. WHAT IS DRUM?................1 2. WASHER SPECIFICATION ............4 3. OPERATING MECHANISM DIAGRAM.........6 4. EACH PART OF DRUM WASHING MACHINE ......8 5. PARTS LIST BY ASS'Y ...............10 6. CONTROL PART FUNCTION SPECIFICATION ......25 7. ELECTRONIC FIELD PARTS LIST AND SPECIFICATION ..48 8.

  • Page 3: What Is Drum

    1. WHAT IS DRUM WASHING MACHINE? 1. Drum Washing Machine Water consumption is reduced by using the power of the laundry falling (free-fall) created when rotating the drum. With temperature control system, this drum washing machine saves energy and improves washing performance at the same time.
  • Page 4 3. Power System DD Control: Direct drive type of direct connection between drum and motor Rotation by powerful high-performance BLDC motor Pump drainage type for built-in installation and Natural drainage...
  • Page 5 4. Major Functions Washing When rotating drum after putting in the laundry and detergent into the drum, the laundry are rotated by protrusions (lifters) attached inside the drum. Washing is carried out with bending and impact actions generated by falling of the laundry to the bottom part of drum.

  • Page 6: Washer Specification

    2.WASHER SPECIFICATION 1. Product Specification PARTS NAME CABINET F FRAME DOOR O PROTECT GLASS PANEL F CASE DETERGENT PLATE TOP CABINET BUTTON DIAL DIMENSION(WxDxH) 630mm(W) x 792mm(D) x 976mm(H) MACHINE WEIGHT 82 kg WATER CONSUMPTION WASH 91 / DRY 51 WASHING CONSUMPTION POWER SOURCE 230V/50Hz, 110V/60Hz, 127V/60Hz...
  • Page 7 PARTS NAME CABINET F FRAME DOOR O PROTECT GLASS PANEL F CASE DETERGENT PLATE TOP CABINET BUTTON DIAL DIMENSION(WxDxH) 630mm(W) x 792mm(D) x 976mm(H) MACHINE WEIGHT 82 kg WATER CONSUMPTION WASH 91 / DRY 51 WASHING CONSUMPTION POWER SOURCE 230V/50Hz, 110V/60Hz, 127V/60Hz POWER WASHING 200W (Heating ) ~ 2000W...

  • Page 8: Operating Mechanism Diagram

    3. OPERATING MECHANISM DIAGRAM 4. WATER SUPPLY PART • Cold Water: 3 holes Cold water, pre-washing Water • Hot Water: 1 hole Supply • Water supply box, hose 6. DRY PARTS • HEATER DRY : OPTION Detergent • BLOWER FAN Container •...
  • Page 9 1. CONTROL PART Electricity Input • Main PCB Noise Filter • Front PCB • Harness • Noise filter Program • Power Cord: 15A 2. DRIVING PART • BLDC motor • Drum • Bearing • Spider/ shaft • Tub Drum • Weight balancer Motor 3.

  • Page 10: Each Part Of Drum Washing Machine

    4. EACH PART OF DRUM WASHING MACHINE...

  • Page 12: Parts List By Ass'y

    5. PARTS LIST BY ASS’Y 1. PANEL F AS PARTS NAME CODE SPECIFICATIONS Q’TY REMARK PANEL F OUTER 3614287900 ABS PANEL F INNER 3614288000 ABS DECORATOR START 3611686300 ABS BUTTON POWER 3616637100 ABS DECORATOR COURSE 3611686200 ABS WINDOW COURSE 3615505700 Trans parency ABS BUTTON DIAL IN 3616637300 ABS BUTTON DIAL OUT...
  • Page 13 1. PANEL F AS PARTS NAME CODE SPECIFICATIONS Q’TY REMARK PANEL F 36142T1400 ABS BUTTON POWER 3616638500 ABS WINDOW COURSE 3615506600 ABS KNOB DIAL IN 3613406400 ABS KNOB DIAL OUTER 3613406500 ABS BUTTON START 3616638600 ABS BUTTON RES 3616638700 ABS BUTTON FUNCTION 3616638400 ABS WINDOW DISPLAY...
  • Page 14 2. INLET BOX AS PARTS NAME CODE SPECIFICATIONS Q’TY REMARK NOZZLE TOP 3618105400 PP NOZZLE UNDER 3618105500 PP INLET BOX 3617510900 PP CASE DETERGENT 3611146400 PP CAP SOFTENER 3610918300 PP CASE LIQUID 3611147900 PP CAP LIQUID 3610918000 PP HOSE INLET 3613272000 EPDM, "U"...
  • Page 15 3. CABINET F ASSY...
  • Page 16 PARTS NAME CODE SPECIFICATIONS Q’TY REMARK CABINET F 3610813000 SECD 0.8 t PLATE HINGE SUPPORT 3614539800 SPG 0.8 t HINGE DOOR 3612903800 AL CAP HINGE DOOR 3610916500 POM FRAME DOOR O 3612209900 ABS, CR HANDLE COVER 3612611500 ABS HOOK DOOR 3613100900 ZNDC SPRING HOOK 3615115400 SUS304...
  • Page 17 4. CABINET ASSY...
  • Page 18 PARTS NAME CODE SPECIFICATIONS Q’TY REMARK NOZZLE AIR 3618103110 PP, DWD-100DR FRAME TOP R 3612209300 GI 1.6 t FRAME TOP L 3612209400 GI 1.6 t CABINET 3610812900 SGCC 0.8 t COVER BACK AS 3611425540 COVER BACK + PAD CABINET STOPPER SPRING 3615202200 POM, DWD-100DR FIXTURE PLATE...
  • Page 19 5. BASE U AS...
  • Page 20 PARTS NAME CODE SPECIFICATIONS Q’TY REMARK E01 BASE U 3610393200 PP, DWD-T120R E02 SUPPORTER LEG 3615303600 PO+, 3.0T E03 FIXTURE LEG 3612006400 ABS, DWD-100DR E04 SPECIAL BOLT 3616029000 10 X 1.25, 51MM E05 FOOT 3612100600 BUTYL, DWD-100DR E06 REACTOR 52G043J002 DWD-100DR, 4A E07 DAMPER FRICTION 361A700150 110N AKS ST=170-260 DL=197.5 LOW NOISE E08 DAMPER FRICTION 361A700110...
  • Page 21 6. TUB ASSY...
  • Page 22 PARTS NAME CODE SPECIFICATIONS Q’TY REMARK F01 BALANCER WEIGHT 3616109000 DWD-T120R F02 GASKET DRY 3612323900 EPDM F03 NOZZLE SHOWER 3618104000 PP, DWD-100DR F04 DAMPER PIN 361A700200 AKS D=14.5 F05 DAMPER FRICTION 361A700110 AKS, 70N F06 TUB FRONT 3618829800 FRPP, DWD-T120R F07 DRUM FRONT 3617003101 SUS, 0.5T...
  • Page 23 7. DUCT B AS + DUCT PIPE AS...
  • Page 24 PARTS NAME CODE SPECIFICATIONS Q’TY REMARK UNIT FAN MOTOR 36189L3Z20 ISM-7780 6DWWA 24V. COVER DUCT 3611428700 ALDC DUCT B UPPER 361A202100 ALCOST 0.5T CLAMP CORD 3611203330 DABE-2, A=9, B=5,3, L=105 FAN AS 3611885900 DI33 FAN SCREW TAPPING 7122400811 T2S TRS 4x8 SPECIAL SCREW AS 3616030100 TAPTITE P, TRS 4*16, WASHER...
  • Page 25 8. PLATE TOP ASSY PARTS NAME CODE SPECIFICATIONS Q’TY REMARK PLATE TOP 3614539900 SECC 1.2T LABEL CAUTION 3613553830 PVC, SILK LABEL INSTALL 3613555700 ART+OPP, WATER VALVE STICKER...

  • Page 26: Control Part Function Specification

    6. CONTROL PART FUNCTION SPECIFICATION 1. SEQUENCE CHART...
  • Page 29 2. Skill of each Sequence...
  • Page 35 3. Main Function of PCB Program 3-1. LOAD SENSING 1) Deciding the water level Normal, White, Eco-White Course will be followed by this process. Check the water level with dry laundry at the starting wash. Check the water level by using motor output data during 20 sec, 65rpm. 2) Deciding Spin Starting Step.
  • Page 36 3-3. DOOR S/W 1) The working principle of Door S/W Door Locking Bimetal on (3 sec) --> solenoid (supply 20msec pulse 2 times) Door Unlocking Bimetal off --> solenoid(supply 20msec pulse, until lock) After door locking all parts can work nomally. After pressing power button, if the temperature of wash thermistor is over 55 or the water level is over the safety level, the door will be locked.
  • Page 37 Start/Hold Door unlock button, 2sec ON Water level is less than Drainage safety level? Cold water Temperature is less supply than 50 ? DISPLAY ‘LOCK’ OFF Door Open...
  • Page 38 5. TEST MODE 5-1. Testing Mode PCB and other electronic parts will be tested without water supply whether they are normal or not. 1) Process press power button --> press "SPIN" button 3 times with pressing "WASH" button --> 'L d' will be shown on LED --> Whenever pressing "TEMP"...
  • Page 39 6-1. Error Display 6-1. IE (Input Error) - Error in water supply 1) Conditions of Occurrence In case the designated water level is not reached in 5 minutes during water supply or re-supply 2) All LEDs are turned off and 'IE' blinks in18:88 display. 3) Error buzzer alarm is sounded for 10 seconds per every 10 minutes.
  • Page 40 6-4. LE (Lock Error) - Door opening error 1) Conditions of Occurrence When intending to begin cycle by pressing start/ temporary stop button while door is opened 2) All LEDs are turned off and 'LE' blinks in 18:88 display. 3) Error buzzer alarm is sounded for 10 seconds per every 10 minutes. 4) Error display is cleared when turning off/ on power.
  • Page 41 6-7. E4 - Water leakage during washing 1) Conditions of Occurrence In case water level falls below re-supply even after 15 times of re-supply prior to finishing of water heating 2) All LEDs are turned off and 'E4' blinks in 18:88 display. 3) Error buzzer alarm is sounded for 10 seconds per every 10 minutes.
  • Page 42 6-9. Motor-related Error 1) E5 (DC-Link High Voltage) Error In case DC-link voltage to IPM increases to 450V or higher Motor operation is stopped and 'E5' is shown in display window. Error buzzer alarm is sounded for 10 seconds per every 10 minutes. Error display is cleared when turning off/ on power.
  • Page 43 3) H5 Error - Water temperature error in wool/ delicate course In case water temperature in wool/ delicate course is 45 or higher Error buzzer alarm is sounded for 10 seconds per every 10 minutes. Error display is cleared when turning off/ on power. 4) H6 Error - Abnormality in washing heater Within 15 minutes after heater operation begins;...

  • Page 44: Electronic Field Parts List And Specification

    7. ELECTRONIC FIELD PARTS LIST AND SPECIFICATION...
  • Page 46 1. PCB PIN brown...
  • Page 47 2. VALVE INLET Classification 3-hole Valve and Hot Water Valve Code 3-hole: 3615416940, Hot Water: 3615416700 Color Gray Coil Resistance 4320 ~ 5280 Supplying water for washing/ pre-washing and bleach Appearance Washing Water Input Valve Structure Rre-washing Water Input Valve Hot Water Input Valve M4 4 Bleach Input...
  • Page 48 • Suspension of water supply Water supply not • Tap frozen carried out (IE) • Tap closed • Hot & cold water hose switched for connection • Low water pressure (0.2kgf/cm or less) • Blocking of water supply valve filter by foreign substances •...
  • Page 49 Symptoms of Inspection Inspection Method Inspection Result Problem Identified Repair Method Breakdown Spot Water 1) Suspension of water supply supply not 2) Water tap locked carried out 3) Cold-hot water hose incorrectly - Cold/ hot water hose switched -Defect in cold/ hot water -Assemble cold/ hot connected -Large amount of rust, sand and...
  • Page 50 3. Water Level Sensor 1) Spec. of Water Level Sensor HEATER SAFETY STEAM RESET RINSE ADD WATER OVERFLOW (kHz) 24.55 24.736 25.2 23.2 23.75 23.18 22.96 22.6 O/F: Forced drainage is RESET : Low: Small load of laundry, therefore considered to be necessary as water water level of 'low' level is high.
  • Page 51 4. POWER CORD 1) Specificafion Classification Rated Cord Thickness Color Code Type Length Remarks 250V/15A 1.5sq Gray 3611340430 LP-31 SJT 2.3m 2) Assembly 4 embossed parts in cabinet -> To prevent loosening after assembly -> SS: 2 special screws -> LG: Forced indentation [Before] [After] .
  • Page 52 5. DOOR LOCK SWITCH 1) DOOR LOCK S/W...
  • Page 53 4) Diagnosis of Defect Error Symptoms Detailed Symptoms Cause Diagnosis of Defect Solution Mode – Ticking Tick' during initial Normal noise Normal sound generated during solenoid operation when noise operation and 'tick-tick' 'sliding CAM' is locked/ unlocked to close or open door. during temoprary suspension: 'DF' type only...
  • Page 54 1. Heater 1) Spec of Heater of Washing Machine Classification Parts name DUCT COVER FAN MOTOR HEATER DRY DUCT B LOWER VALVE INLET(DRY) THERMOSTAT THERMISTOR DUCT B UPPER FAN AS FUSE TEMPERATURE...
  • Page 55 2) Dry Function Diagram T : Thermistor (CONTROL DRY DUCT HEATER’S TEMPERATURE ) HEATER FAN MOTOR WATER SUPPLY CONDENSING DRUM DUCT DRAIN HOUSING While rotating DRUM, DRY HEATER applice heat to air and FAN blows it into DRUM evaporating water in the laundry. •...
  • Page 56 4) Dry Course COURSE DRY COURSE Heater control temperature is 60°C On/70°C Off LOW TEMP. Drying Time is 110min according to Load Sensing Data Heater control temperature is 95°C On/105°C Off, with good condition for ironing IRON Drying Time is 60min according to Load Sensing Data Cupboard Heater control temperature is 95°C On/105°C Off, drying time is 150 min STRONG...
  • Page 57 5) TROUBLE SHOOTING OF DRY SYSTEM HEATER DRY Function : heating the air during dry • FAILURE MODE : * "H7" - The air cannot be heated to 10°C during 2 min. • CHECKING METHOD : * Check the resistance of heater coil and replace with new one. Thermistor Function : sensing the air temperature.
  • Page 58 SWITCH THERMOSTAT(BIMETAL) function : control the duct temperature, if the temp reached over 150°C, all power supply will be cut. and if the temp go down 120°C the power will be ON. protecting overheating by cutting off heater power supply if the temperature rises over 150°C, and reoperating heater by connecting heater power supply if the temperature falls under 120°C.
  • Page 59 6) LACK OF DRY PERFORMANCE • Situation : after drying, the clothes still get wet. cause) The laurdry amount is more than the recommendation capacity 7.0kg. Condensing cold water is not supplied. Clogging Bellows Duct results in poor air circulation. checking method) part name checking point...
  • Page 60 • Situation : PCB shows "H7". cause) Dry heater is cut-off. Fuse temp. is cut-off. repaire method) replace the Dry heater. replace the Fuse temp. checking point part name checking results repaire method HEATER dry Heater is short or cut-off. replace the FUSE TEMPERATURE...
  • Page 61 • situation : PCB shows "E3". cause) FAN MOTOR can not work. countermeasures) Replace the Fan Motor. part name checking results repair method disassemble process of Fan Motor 1Disassemble Duct Cover As from Duct B As FAN MOTOR fan motor failure replace fan motor (Screw 4EA)
  • Page 62 Washing Heater Temp. Sensor Table...
  • Page 63 Day Heater Temp. Sensor Table...
  • Page 64 7. HEATER 1) Spec of Heater of Washing Machine Temp. Fuse of Washing Heater (184°C CUT OFF TYPE) : Located inside heater to prevent fire, etc. caused by heating without water due to breakdown of water level sensor, etc. : Cut-off in app. 1min in case of overheating, heater temp. of app. 270°C : Washing heater must be used under water.
  • Page 65 2) Breakdown Diagnosis Breakdown Cause Diagnosis Solution Symptoms Error Mode Washing Wiring short Check for short Connect the cut-off part. "H6" water not heated (common for Washing heater or Check for short: Normal if 23.3~25.7ohm between both Replace washing "H6" drum) temp.
  • Page 66 7. HEATER 1) Structure of BLDC Motor 2) Power Transmission System of BLDC Motor...
  • Page 67 3) Specification Classification Item BLDC : DD Motor 1. General Rated Voltage Vm = 310 [Vdc], Hall IC Voltage 5 [Vdc] Insulating Structure Type B, insulator method External Appearance Shaft connection and stator connection structure, Air-gap : 1mm No. of Poles 24 poles, Core: 36 slots, Layer: [30mm] 2.

  • Page 68: Wiring Diagram

    8. WIRING DIAGRAM...

  • Page 69: Trouble Shooting Regarding Drain

    9. TROUBLE SHOOTING REGARDING DRAIN 1) Structure of Dran Parts by TUB 2) Checking Methods • Situation : * "OE" is shown on PCB. * Not finishing drain during 10 min. * The water level can not reach to RESET POINT during 10 min of drain. Checking Methods Replacing methods * Check the hose drain O condition;...

  • Page 70: Installation

    10. INSTALLATION GUIDE 1) Related Parts and Configuration PARTS NAME FIGURES REMARKS FIXTURE UP/DOWN AS FIXTURE UP AS (3612008200) : L= 109mm FIXTURE DOWN AS (3612008300) : L=143mm UNIT SERVICE WRENCH Remove Fixture UP/DOWN AS Adjust Leg LEG ADJUST AS 2) INSTALLATION PROCESS 1Remove the FIXTURE UP/DOWN AS Removal Method...
  • Page 71 3Please install the DRUM WASHING MACHINE properly on even and hard floor as below. 4Adjust the level of washer using LEG ADJUST AS. Adjusting Method Remarks If turned CW, the LEG ADJUST AS moves the washer upward. If turned CCW, the LEG ADJUST AS moves the washer downward.

  • Page 72: Attention Point With Servicing

    11. ATTENTION POINT WITH SERVICING Item Part Name Checking Point 1 Replacing Thermistor Thermistor Dry Keep the Packing from seperating (Hold Packing when replacing) Keep the Packing from folding 2 Replacing Duct B As DUCT B AS & Check the sealing between Duct Pipe & Duct B AS &...
  • Page 73 DAEWOO ELECTRONICS CORP. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : PRINTED DATE: Apr. 2008...
  • Page 74 ABOUT THIS MANUAL ABOUT THIS MANUAL VISION CREATIVE, INC.

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