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Bosch WKD28350GB Repair Instructions

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1
INTRODUCTION........................................... 2
1.1
Purpose of the document................................................... 2
1.2
General symbols ................................................................. 2
1.3
Safety-relevant symbols..................................................... 2
2
SAFETY ........................................................ 3
2.1
Qualifications of service technicians ................................ 3
2.2
Identification of danger levels ........................................... 3
2.3
Identification of damage to property ................................. 3
2.4
General safety instructions................................................ 4
3
3.1
Operation ............................................................................. 6
3.2
Imbalance detection function ............................................ 8
3.3
Drying cycle......................................................................... 9
3.4
Dryer heater....................................................................... 10
3.5
Warm spin cycle................................................................ 11
3.6
NTC tasks .......................................................................... 12
3.7
Power module ................................................................... 15
4
DIAGNOSTICS ........................................... 17
4.1
Malfunctions...................................................................... 17
4.2
Mechanical faults .............................................................. 19
4.3
Result faults ...................................................................... 19
4.4
Noises ................................................................................ 19
4.5
Odours ............................................................................... 20
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Washer-Dryer
5
TEST AND REPAIR ....................................21
5.1
Connecting the appliance ................................................ 21
5.2
Removing door collar....................................................... 23
5.3
Removing the front panel ................................................ 24
5.4
Removing the pump ......................................................... 24
5.5
Removing dispenser tray housing .................................. 25
5.6
Removing the fan.............................................................. 26
5.7
Removing the dryer heater .............................................. 28
5.8
Removing the condenser................................................. 29
5.9
Renewing the washing agitator ....................................... 31
5.10
Removing the float switch ............................................... 32
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Table of Contents
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  Summary of Contents for Bosch WKD28350GB

  • Page 1: Table Of Contents

    Washer-Dryer INTRODUCTION........... 2 TEST AND REPAIR ........21 Purpose of the document........... 2 Connecting the appliance ..........21 General symbols ..............2 Removing door collar............23 Safety-relevant symbols............. 2 Removing the front panel ..........24 Removing the pump ............24 SAFETY ............3 Removing dispenser tray housing ........
  • Page 2: Introduction

    INTRODUCTION Special information Purpose of the document Safety-relevant symbols The repair instructions: Symbol Meaning ► guide the service technician in troubleshooting and repairing domestic appliances General warning information ► assist the technical storeman in deciding which spare parts are probably required for the repair Danger of electric shock ►...
  • Page 3: Safety

    SAFETY Identification of damage to property Qualifications of service technicians Identification Meaning The described activities may be carried out only by electrical engineers NOTE Warning of potential damage to property and electrical engineers for specific activities if they have been trained by BSH or an authorised establishment.
  • Page 4: General Safety Instructions

    General safety instructions W A R N I N G Exposed conductive parts may be live if a fault has ► Read repair manual and follow the instructions included in it. occurred. ► Proceed systematically and follow the instructions for Danger to life caused by electric shock! troubleshooting and repairs.
  • Page 5 N O T E Components which come into contact with electro- static voltage will be damaged beyond repair ► Before carrying out any work, apply protective system to components susceptible to electrical discharge. ► Observe measures to protect the components suscep- tible to electrical discharge.
  • Page 6: Construction And Function

    3.1.1.2 Running the programme: CONSTRUCTION AND FUNCTION Operation 3.1.1 Fluff Clean Drum empty and door closed Move porgramme selector to “Fluff Clean” Press (Start/Pause) button The programme can also be run at any time without a request from the appliance. It is recommended to run the programme approx. every 10 drying cycles.
  • Page 7 3.1.2 Flexi Time ► Setting the wash duration: normal-medium-minimum. ► Flexi Time is not possible if the “Intensive” option has been selected. The saved washing time is not compensated by temperature or mechanical washing action! Childproof lock 3.1.2.1 Activation Simultaneously press the “Option” and “Set/Select” buttons. When the childproof lock is activated, the key symbol is lit on the display.
  • Page 8: Imbalance Detection Function

    Imbalance detection function If an imbalance occurs, the ramp is terminated before the spin cycle. There is a limited number of attempts. 3.2.1 Appliances running at 500/600 rpm Level Imbalance in kg Attempts Speed Level 0 U < 0.95 – Max.
  • Page 9: Drying Cycle

    Drying cycle During the drying cycle the fan (2) blows air into the heating duct (10). The air is heated there and then transferred into the drum and washing solution tub via the gasket (9). The warm air absorbs the humidity from the washing and is drawn by the fan through a connecting piece (5) into the vortex condenser (4).
  • Page 10: Dryer Heater

    3.4.2 Resistance measurement: Dryer heater Connections Resistance in ohm 3.4.1 Design 104–124 1–2: As the new heating duct contains 2x 920 W heating elements, the 52–62 1–3: drying process can be implemented in 2 stages with a total of 1840 W. 52–62 1–4: To reduce heat losses, the heating duct is thermally separated from...
  • Page 11: Warm Spin Cycle

    Warm spin cycle 3.5.1 Function The warm spin cycle is used to improve dehumidification of the washing. It is implemented at the start of the drying programme after the predrying cycle and when a temperature of 54 °C has been reached on the NTC at the tub (NTCD1).
  • Page 12: Ntc Tasks

    NTC tasks 3.6.1 Water temperature The NTC water heater (4) controls the temperatures for the wash programmes. The door remains locked if the water temperature is > 60 °C. Water temperature NTC > 60 °C (N1) ► If the user stops the wash programme and selects “Drain/Spin”...
  • Page 13 3.6.2 NTC air temperature Air temperature NTCD1 > 68 °C (N0) ► If the user stops the drying programme and NTC dryer heater (1), condenser outlet (2) and washing machine selects “Drain/Spin” or “Drain”, a cool down is run (5) control the temperatures for the drying programmes. before the drain cycle until the air temperature 3.6.2.1 NTC washing machine tub (5) NTCD1 <...
  • Page 14 3.6.2.3 NTC dryer heater (1) NTC dryer heater (3) controls the temperatures for the drying programmes: ► Cottons/Coloureds: 90 °C ► Easy care: 70 °C ► Excess temperature: 105 °C 3.6.2.4 Safety temperature switch (3) safety temperature switch limits the temperature in the heating duct to 150 °C if the NTCD3 (1) is defective (characteristic shifted).
  • Page 15: Power Module

    Power module Light well - removable CNM Dryer heater (RD1+2) + safety temperature switch THS CNA Water heater (RA) Humidity sensor (optional) NTC water heater (NTC) CND NTC dryer heater (NTCD1–3) CNC Water level controller/pressure switch (PRL) CNH Aquastop valve (EAQ) + Aquastop switch (AQS) CNF Pre and main wash valve (EVC, EVW) + drain pump (DP) CNG Condensation valve (EVC) CNV Fan motor (MV)
  • Page 16 Door lock (BP) Dryer heater (RD2) Dryer heater (RD1) Water heater (RA) Motor (M) Motor (M) Buzzer TR10 Aquastop (EAQ) Hot water valve (EVH) Drain pump (DP) Prewash valve (EVP) Main wash valve (EVW) Condensate valve (EVC) TR11 Fan (MV) Motor (M) –...
  • Page 17: Diagnostics

    DIAGNOSTICS Malfunctions Fault Cause Fault correction Advise customer Door cannot be opened Appliance not switched on Switch on appliance – magnetic lock opens Temperature higher 60 °C (3) Advise customer NTC defective Replace NTC Water level too high (level?) (3) Advise customer Water level sensor defective Replace water level sensor...
  • Page 18 Fault Cause Fault correction Advise customer “Drain/Spin” or “Drain” programme Water temperature > 60 °C Before draining, a cool down is run This may occur if the user stops the is not run (N1) until the water temperature < 60 °C wash programme and selects is reached (max.
  • Page 19: Mechanical Faults

    Mechanical faults Fault Cause Fault correction Advise customer Damage to washing Foreign objects in the tub Check tub and drum for foreign objects (e.g. paper clips, bra underwire, etc.) Collar defective Check gasket is correctly installed, if required, replace Sharp-edged areas on the drum Check drum with a nylon socking Result faults Fault...
  • Page 20: Odours

    Odours Fault Cause Fault correction Advise customer Smell of burning/smoke Heater blocked with fluff Clean heater and process air passage Heater burnt out Check heater, if required, replace Check safety temperature controller, if required replace Check heater NTC, if required replace Fusty odour Drain hose blocked...
  • Page 21: Test And Repair

    To adjust the appliance to a working height of 90 cm, a built-under base can be purchased from sales: Siemens: WZ20470, Bosch: WMZ20470, Neff: Z7090X0 Attach appliance feet with retaining pockets: 080451 (WX975600). The washer-dryer must not touch the side walls of the installation recess! 5.1.2...
  • Page 22 5.1.6 Hose and line lengths approx. 140 cm approx. 76 cm max. 90 cm approx. 100 cm approx. 140 cm min. 50 cm approx. 135 cm approx. 95 cm 5.1.7 Electrical connection Connect the appliance to a correctly installed earthed socket only. Comply with the specifications on the rating plate.
  • Page 23: Removing Door Collar

    Detach rear clamping ring. Removing door collar 5.2.1 Requirement: ► Flexible extension 340852 or flexible Torx 20 screwdriver. ► Bit adapter 340869 ► Torx bit TX20 1/4" 340867 5.2.2 Removal Remove door Remove fascia panel Detach collar from front panel Remove door lock Remove front panel Remove connecting piece from the heating duct.
  • Page 24: Removing The Front Panel

    Removing the front panel Removing the pump Remove door To remove the pump, it is not necessary to remove the appliance. The drain pump can be removed from the front by removing the front Remove facia panel panel. Detach collar Remove door lock Risk of being cut Sharp edges!
  • Page 25: Removing Dispenser Tray Housing

    Remove VDE cover Removing dispenser tray housing Remove hose connections Remove fascia panel Remove front panel Remove plastic lug Remove cross-bar Loosen screws on the valve block Loosen cable connections Cross-bar Cable connections Valve block screws 815_58300000146136_ara_en_b.doc – 12.04.10 Seite 25 von 32...
  • Page 26: Removing The Fan

    Remove heating duct cover Removing the fan Remove the fan 5.6.1 Removal Remove VDE cover Remove supply hose. Alternatively the valve block can also be detached In Aquastop models the hose is secured with a Torx 20 with safety pin! Back cross-bar Upper cross-bar Heating duct cover...
  • Page 27 5.6.2 Installation ► Renew the seals (5 and 6) if required. ► If required, also seal with heat-resistant silicone. Fan sealing tape Fan heater sealing tape 815_58300000146136_ara_en_b.doc – 12.04.10 Seite 27 von 32...
  • Page 28: Removing The Dryer Heater

    5.7.2 Installation Removing the dryer heater 5.7.1 Removal Renew seals. Install heater with heater holder Remove VDE cover Connect cable connections. Ensure the plug-in connections Remove upper cross-bar are connected correctly Remove heating duct cover Attach heating duct cover Loosen cable connections. Pay attention to the plug Attach upper cross-bar assignment for subsequent installation! Attach VDE cover...
  • Page 29: Removing The Condenser

    Removing the condenser 5.8.1 Removal Remove VDE cover Remove plug from NTC condenser output (NTCD2) Remove back appliance cover Remove back cross-bar Remove screws (1) from housing Support rail Condenser clamping ring Washing machine tub clamping ring Screw for support rail Remove clamping ring from washing machine tub (3) Remove screw (4) from the support rail (1) Place support rail down...
  • Page 30 5.8.2 Installation Push condenser upwards onto the fan housing Attach support rail Attach screws to housing Attach clamping ring to washing machine tub (3) Leak! Leakage water ► When installing the collar on the tub, do not use any lubricant, e.g. washing up liquid, as the gasket can easily slip off the connecting piece again.
  • Page 31: Renewing The Washing Agitator

    Renewing the washing agitator 5.9.2 Installation 5.9.1 Removal Bend sheet-metal bracket upwards Depress sheet-metal bracket using a screwdriver Insert washing agitator into guide grooves and push back- wards until the sheet-metal bracket engages Pull washing agitator forwards out of its holder 815_58300000146136_ara_en_b.doc –...
  • Page 32: Removing The Float Switch

    5.10 Removing the float switch The float switch is attached to the base plate from below with two screws. To remove the float switch, the appliance must be tilted! 815_58300000146136_ara_en_b.doc – 12.04.10 Seite 32 von 32...