Bosch WAT28400 Repair Instructions Download

Page: 20 / 85

Design and function

2017-05-22 / DIS 113_58300000186503_ara_en_c

Page 20 of 85

3.11

Unbalanced load detection

Unbalance

occurs in rotating bodies whose mass is not distributed in a rotationally

symmetrical manner. The loaded drum of a washing machine always experiences

unbalance, as the laundry items are never optimally distributed around the axis of

rotation. If the unbalance cannot be offset by the oscillating system of the washing

machine, damage to the appliance and its installation location may occur.
The

unbalanced load detection

monitors unbalance in the drum during the spin

cycle start-up. If an unbalance occurs which is too high, the control unit reduces

the rotary speed of the drum. Damage caused by high unbalance is avoided in this

way. In order to measure the unbalance, the motor is accelerated to a constant

rotary speed for a specific time period. Appliances in newer model series measure

unbalance at various rotary speeds. The multilevel unbalance detection is more

accurate and ensures that the unbalance limit value provided is not exceeded for

the spin speed selected.
There are various procedures for measuring the unbalance:

•

Determination of asynchronous motor operating values

•

Determination of the drum deviation

Appliances with 3D/3G sensor

determine the unbalance before acceleration to

the spin speed in 3 consecutive measurements.

Fig. 15:

Unbalance measurement process schematic with 3D/3G sensor

Measurement 1

Duration of measurement 2

Measurement 2

Duration of measurement 3

Measurement 3

Decreased rotary speed after start-up attempt

Mea-

sure

Measurement

system

Measurement

rotary speed

Duration of

measurement

Measured

quantity

Motor tachome-

ter

100 rpm

20 seconds

Rotary speed

fluctuation

3D/3G sensor

180 rpm

10 seconds

Maximum ampli-

tude of the oscil-

lating system

3D/3G sensor

600 rpm

10 seconds

Maximum ampli-

tude of the oscil-

lating system

Table 4:

Measurements

If measurement 1 or 2 determines an impermissible unbalance, the control unit

reduces the rotary speed of the drum in order to improve the distribution of the

laundry. Then, measurement 1 is restarted.
A maximum total of 15 start-ups to the rotary speed are possible for measurements

1 and 2. For the wool wash programme, unbalance recognition is limited to 2 start-

up attempts.

Summary of Contents for WAT28400

Page 1: ... lighting not functioning 31 Gasket leaking 32 Appliance won t switch on off 32 Pump off 32 Does not use fabric softener with extra rinse 33 Water runs in constantly 33 Water leakage 33 Takes too much water 33 Takes fabric softener immediately 33 Option buttons do not function 34 Display dark 34 Appliance is not functioning 34 Appliance does not heat up 34 4 2 Result faults 36 Appliance is not spi...

Page 2: ...o programme 57 6 6 Correcting the gap 58 6 7 Lengthening the inlet hose 60 6 8 Extending outlet hose 432060 61 6 9 Flashing the operating module and power module 62 6 10 Replacing motor 65 6 11 Removing installing the 3G sensor 66 6 12 Replacing heater 68 6 13 Replacing NTC sensor 69 6 14 Replacing belt pulley 70 6 15 Replacing the soap drawer 71 6 16 Install repair set of soap drawer steam leakag...

Page 3: ...r applicable documents The following documents include additional relevant repair information General repair instructions Error codes and service programs Circuit diagrams Exploded drawings Parts lists Repair videos 1 2 Explanation of symbols 1 2 1 Danger levels The warning levels consist of a symbol and a signal word The signal word indicates the severity of the danger Warning level Meaning Non o...

Page 4: ...s of ignoring the warning Actions to protect from danger The following example shows a warning that warns against electric shock due to live parts The measure for avoiding the danger is mentioned Risk of electric shock due to live parts Disconnect the appliance from the mains at least 60 seconds before starting the work 1 2 4 General symbols The following general symbols are used in this document ...

Page 5: ...om the mains for at least 60 seconds before starting work Do not touch the housing components and cables For tests on an energised system use a residual current circuit breaker Discharge high voltage capacitors Risk of injury from sharp edges Wear protective gloves Risk of injury when dealing with harmful substances Observe the associated safety data sheet Risk to the appliance s safety function O...

Page 6: ... Cut off the gas supply before working on gas carrying connections Check tightness following work on connections carrying gas Only repair gas appliances with original parts that were tested and released for such use If you smell gas Do not press any electrical switches Extinguish keep clear of open flames Ensure that room is well ventilated Close the gas isolating equipment 2 3 4 Refrigerators and...

Page 7: ...liance is functional Check according to VDE 0701 or country specific regulations Check external appearance function and tightness Document repair work measured values and functional reliability If the appliance is not functional Identify the appliance as not functionally reliable Warn customers of commissioning and notify them in writing ...

Page 8: ... 2 Function The safety system is active as soon as the appliance is switched on Water can leak from various points on the appliance Leakage water hose of the Aquastop Outer tub Seal The leaking water collects in the base support The increasing water level in the base support lifts the float and actuates the safety switch The electronics deactivate the Aquastop valve and stop the water supply If th...

Page 9: ...switch 1 Float 2 Safety switch The float 1 is in the base support The safety switch 2 is situated above the float The float and switching contact of the safety switch are mechanically connected to each other 3 2 2 Function If water infiltrates into the base support the float rises and actuates the safety switch The Aquastop valve is deactivated The wash liquor is pumped off ...

Page 10: ...impeller 2 with a permanent magnet 3 is located in the water inlet 1 The circuit board with reed contact switch 4 is outside the water inlet in the area of influence of the permanent magnet 3 3 2 Function Inflowing water moves the impeller and the permanent magnet The rotating magnetic field opens and closes the reed contact switch The appliance electronics determine the volume of water which has ...

Page 11: ...ills the space between the light emitting diode and phototransistor of the light barrier The turbidity of the water determines the signal strength on the phototransistor Fig 5 Function of the turbidity sensor 1 Water 3 PCB 2 Light barrier The turbidity sensor detects the turbidity of the water in the following programme steps Prewash Rinse The measured turbidity provides information about the degr...

Page 12: ...the light emitting diode 1 and the phototransistor 3 are arranged opposite each other The light beam 2 from the light emitting diode hits the phototransistor 3 5 2 Function The infrared light emitting diode transmits light to the light sensitive base of the phototransistor The phototransistor becomes conductive as a result The voltage on the phototransistor drops If the light beam is weakened or i...

Page 13: ...turbidity sensor The sensitivity and function of the turbidity sensor may be impaired by deposits The turbidity sensor is calibrated before each wash programme Drum must be empty Door is not closed Switch on appliance select programme but do not start the turbidity sensor is now calibrated Now the washing machine is ready for use ...

Page 14: ...2017 05 22 DIS 113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 14 of 85 3 7 Anti crease function A lower speed during the spin interval and longer fluffing at the end of the programme will reduce creasing ...

Page 15: ... permanent magnet is installed in the appliance near the 3D sensor 3 8 2 Function The 3D sensor uses the Hall effect If the drum drops due to the load or is deflected during the spin cycle the position of the permanent magnet moves with respect to the 3D sensor This changes the effect of the magnetic field on the Hall elements The Hall elements generate Hall voltages The electronics evaluate the v...

Page 16: ... load the control optimises the volume of water and the duration of the wash programme The load detection function with 3D sensor evaluates the mass of the washing Fig 9 Principle of the load detection function with 3D sensor The sensor measures how far the oscillation system drops when the drum is loaded with washing The load is calculated based on the measurement result The 3D sensor is calibrat...

Page 17: ...ensor The 3G sensor consists of 3 Hall elements and a microcontroller The Hall elements are arranged in such a way that the 3 spatial axes X Y and Z are measured 3 10 1 Structure of the 3G sensor Fig 10 Components of the BLDC 3G sensor Fig 11 Components of the UMAC 3G sensor 1 Complete 3G sensor 3 PCB 2 Cover 4 Housing ...

Page 18: ...Design and function 2017 05 22 DIS 113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 18 of 85 3 10 2 Measurement axes Fig 12 Measurement axis X Fig 13 Measurement axis Y ...

Page 19: ...Design and function 2017 05 22 DIS 113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 19 of 85 Fig 14 Measurement axis Z ...

Page 20: ...it value provided is not exceeded for the spin speed selected There are various procedures for measuring the unbalance Determination of asynchronous motor operating values Determination of the drum deviation Appliances with 3D 3G sensor determine the unbalance before acceleration to the spin speed in 3 consecutive measurements Fig 15 Unbalance measurement process schematic with 3D 3G sensor A Meas...

Page 21: ...termines an impermissible unbalance the control unit limits the rotary speed of the drum in order to improve the distribution of the laundry Then measurement 1 is restarted A maximum of 15 start ups to the rotary speed are possible for the measurement Fig 16 Process schematic for unbalance measurement without 3D 3G sensor A Measurement 1 C Decreased rotary speed after start up attempt B Reduction ...

Page 22: ...ting element contains one fuse if appliances have a plastic tub the heating element contains 2 fuses The electrical connections 1 for the power supply and the protective conductor connection are on the heater flange 2 In the flange of some appliances there is a holder opening 3 for the NTC 3 12 2 Function The resistance heater generates heat and heats the water The insulation separates the electri...

Page 23: ...h siphon The siphon is a trap consisting of pipe systems and receptacles The siphon operates on the principle of an S shaped pipe the lower bend of which always remains filled with water and therefore impedes the passage of vapours and odours At the same time however liquid can flow out through the siphon 3 13 2 Siphon is integrated in the detergent dispenser Fig 19 Detergent dispenser with siphon...

Page 24: ...usgeräte GmbH Page 24 of 85 3 14 Drip rail 3 14 1 Layout Fig 20 Drip rail 1 Drip rail 3 14 2 Function If the gasket is leaking the drip rail conveys the escaping water into the bottom group The increasing water level in the bottom group lifts the float and actuates the safety switch ...

Page 25: ...9 Lint trap complete 5 Sealing ring 3 15 2 Function The drain pump motor drives the impeller The liquor is extracted from the front opening through the lint trap via the rear opening in the drain pump housing and into the outlet hose Voltage is supplied by the power electronics The thermal protection on the drain pump actuates when the power consumption is too high The thermal protection switches ...

Page 26: ...ion connects the Aquastop to the tap The leakage water hose 9 contains the control lead 8 and the inlet hose 10 The control lead 8 connects the valve to the electronics 3 16 2 Function The Aquastop combines several functions The coarse filter and the fine filter filter particles out of the inflowing water and prevent them from getting into the water circuit of the appliance The flow limiter reduce...

Page 27: ...onics detect the 3 states of the door via the switching contacts of the door lock Door open Door closed and not locked Door closed and locked When the door is open the lock bolt and switching block are in the home position The guiding rod holds the switching block in position via the guide groove When the door is closed the locking hook moves the lock bolt and hooks into the housing of the door lo...

Page 28: ... applied briefly to the coil again The switching block and guiding rod return to the home position The lock bolt stop is free and the 2nd switching contact is opened The door lock can be mechanically unlocked via the emergency unlock mechanism 3 17 3 Emergency unlock application Pull the emergency unlock downwards with a tool and release The door can then be opened using the handle ...

Page 29: ...connection 1 of the NTC is designed as a plug or socket 3 18 2 Function NTC resistors are conductive materials with a negative temperature coefficient Negative Temperature Coefficient NTC As the temperature rises the electrical resistance of the NTC drops Fig 27 The function of the NTC The NTC converts the temperature in the detergent solution to electrical resistance The electronics evaluate the ...

Page 30: ...113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 30 of 85 4 1 Malfunctions Fault Possible cause Troubleshooting Gap between control panel and worktop too large Deviations in dimensional accuracy Adjusting gap Page 58 ...

Page 31: ... Copyright by BSH Hausgeräte GmbH Page 31 of 85 Fault Possible cause Troubleshooting Drum lighting not functioning Electrical connection damaged through friction Install lamp retainer 00631842 Replace electrical connection 00613760 Gasket damaged leaking Page ...

Page 32: ...switch on electronics jams Manufacturing period FD 9401 FD 9409 Control module OU must be replaced Control panel and jog dial must not be replaced Foreign objects under the drum Remove foreign objects Foreign objects in the pump Remove foreign objects Blockage in the pump sump Remove blockage from the pump sump Drainage hose kinked Install drainage hose without kinks Blockage in the water outlet C...

Page 33: ... insulation resistance resistance of a line too low Replace cable harness Interruption in the cable harness supply line to water level sensor flow sensor R00 Replace cable harness Water runs in constantly Water pressure too low Optimum water pressure in the mains must be between 100 1000kPa 1 to 10bar When the tap is turned on the flow rate must be at least 8 l min If the water pressure is more th...

Page 34: ...uations due to photovoltaic systems No remedial action currently available Advise customer Aquastop short circuit Replace Aquastop and PU power module PU power module OU operating module 3D sensor See technical information assigned to the appliances 58300000179405 Appliance is not functioning Display drum lighting flickers dark Programme selector turned very slowly Switch off appliance and unplug ...

Page 35: ...e avoided if the appliance is occasionally treated with machine cleaner 00311610 NTC is interrupted NTC supplies incorrect measured values For measured values of NTC see circuit diagrams Check NTC Page 51 Replace defective NTC Earth fault short circuit in NTC replace NTC Water level sensor interrupted Replace water level sensor Cable harness is interrupted Repair interruption in wire with connecto...

Page 36: ...ise customer of correct load capacity Imbalance system defective E 59 in error memory E 57 in error memory Remove 3D sensor Remove 3G sensor Run motor test programme Check electrical connection See the technical information assigned to the appliances 58300000179405 3D sensor not functioning replace 3G sensor not functioning replace Replace motor electronics and or power module 0 Do not replace BLD...

Page 37: ...d during the spin interval and longer fluffing at the end of the programme will reduce creasing Creased laundry Washing was not taken out of the appli ance as soon as the programme ended Preferably take washing out of the appliance as soon as the programme ends Damaged washing foreign objects Due to foreign objects Foreign objects in outer tub or drum Seal defective Sharp edged burrs on in the dru...

Page 38: ... BSH Hausgeräte GmbH Page 38 of 85 Fault Possible cause Troubleshooting Damaged washing holes Holes in the washing Use of washing Navel piercing Fabric damaged by knife Avoid possible damage to fibres due to body jewellery Avoid possible damage to fibres due to knife cuts ...

Page 39: ...ading on denim is caused by mechanical stress This stress occurs when the washing is used or washed Example Treatment The only option is to redye the washing Prevention This stress can be greatly reduced during the wash cycle by using the correct detergent and the correct wash programme and by closing zips and pulling the washing to the left Damaged washing elastane content Elastane content of the...

Page 40: ...ch may occur by im proper use of bleaching agents e g sprin kling bleaching agent onto a soaking item of washing Wash washing at the indicated temperature and with correct dosage of detergent Bleach stains can be eliminated only by redyeing the washing Unsuitable detergent Advise customer Use only mild woollens detergent for woollens Damaged washing matted Washing matted Unsuitable wash programme ...

Page 41: ... in an inconspicuous location placing a white cotton cloth on the item and pressing on the cloth with a hot iron Textiles which lose colour should be washed separately with a mild detergent by hand or in the machine below 30 C or cleaned by dry cleaning NTC defective heats too much Replace NTC Damaged washing washing discoloured Washing discoloured Heating relay permanently closed heats too much R...

Page 42: ...n Foreign objects in outer tub or drum Seal defective Sharp edged burrs on in the drum Check outer tub and drum for foreign objects e g paper clips bra underwires Check seal and replace if required Advise customer Wash underwear in a washing net Check drum with a nylon stocking High detergent consumption Detergent chamber overfilled If it is filled to the Max line a siphon effect may occur Only fi...

Page 43: ...ra_en_c Copyright by BSH Hausgeräte GmbH Page 43 of 85 Fault Possible cause Troubleshooting Poor rinsing result Detergent chamber overfilled If it is filled to the Max line a siphon effect may occur Only fill the detergent chamber to below the Max line ...

Page 44: ...sible cause Troubleshooting Door glass leaking Deposits on the inside of the door glass Clean area between seal and door glass Seal leaking Seal torn by zips or eyelets on items of laundry Replace seal Seal deformed leaking Very high grease levels Observe detergent dosing Wash laundry at a high temperature Use washing powder ...

Page 45: ... part of detergent dispenser tray Replace top part of detergent dispenser tray Replace hose Detergent dispenser leaking Detergent dispenser leaking due to deter gent residue Advise customer Regularly clean detergent dispenser and cover see Instructions for use Foam coming out of detergent dispenser Unsuitable wash programme detergent dosage Advise customer Dose detergent correctly see Instructions...

Page 46: ...0000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 46 of 85 Fault Possible cause Troubleshooting Eliminate Detergent chamber overfilled If it is filled to the Max line a siphon effect may occur Only add detergent to below the Max line ...

Page 47: ... of the magnetic field A droning noise is generated Advise customer Normal operating noise not a fault Screws on the weight loose Tighten screws replace screws if required Weight broken Replace weight Deformation of the belt if the appliance is not used If the appliance is not used for a prolonged period the belt is deformed by the strong curvature of the pulley on the motor shaft The deformed bel...

Page 48: ...e components Scorching odour Smell of burning Check appliance for leaks Eliminate leaks and replace affected components Rotting musty stale odour Foreign object in appliance under the drum in the pump in the gasket in the pump sump Appliance connected behind the siphon Constant washing without bleach e g with colour liquid detergent Underdosage Not washed for a long time or only with a maximum tem...

Page 49: ...00000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 49 of 85 Fault Possible cause Troubleshooting Residues on the gasket may be Mould deposits Detergent residues Clean gasket with disinfectant 00080524 Wipe out gasket with warm water ...

Page 50: ... to different causes Due to dry heating image 1 Due to a calcified heater image 2 Detergent odour Odour of detergent fabric softener The odour of detergent fabric softener varies depending on the product Each manufacturer adds different fragrances to his product Change detergents fabric softeners or use unscented detergents fabric softeners Detergents fabric softeners suitable for allergy sufferer...

Page 51: ...t values which are near the room temperature Compare measured value of the resistance with the setpoint values of the circuit diagrams 7 0 the measured value of the resistance deviates significantly from the setpoint values replace NTC Page 69 8 The measured value of the resistance corresponds to the setpoint values see circuit diagrams 5 1 2 Check NTC as the temperature rises Required tools Heat ...

Page 52: ...eplacement of the motor Prerequisite The appliance is switched off for 5 min The drive belt has been removed The motor connector has been removed To allow the motor to rotate freely remove the motor connector Due to their design brushless motors do not rotate freely if the motor connector is still in position and the appliance switched on 1 Turn the motor pinion with your hand Result The motor pin...

Page 53: ...Use original connection sets see instruction manual Use a suitable worktop not a glass one Prerequisite None 1 Place the appliance on a level and firm surface 2 Align appliance horizontally by turning the height adjustable feet 3 Check horizontal alignment of the appliance using a spirit level If the appliance is installed on a base the appliance must be attached with the attachment kit 080451 An ...

Page 54: ...ck nut on the appliance foot clockwise using a socket wrench 2 Change height by turning the appliance foot 3 Check horizontal alignment of the appliance using a spirit level and if required correct 4 Check the stability of the appliance diagonally from corner to corner Result All 4 appliance feet are firmly on the floor Appliance does not wobble 5 Fix appliance foot and tighten lock nut anti clock...

Page 55: ...BSH Hausgeräte GmbH Page 55 of 85 6 3 Calibrating the load sensor Prerequisite The appliance is switched off Door is closed Drum has been emptied Turn on the appliance by choosing a programme but do not start it Result Load sensor is calibrated Laundry can be loaded ...

Page 56: ...libration Deposits may have an impact on the sensitivity and function of the turbidity sensor The turbidity sensor is calibrated before each wash programme 2 1 The drum must be empty 2 Door is sealed 3 Switch on appliance and set programme do not start Result After approx 5 seconds the turbidity sensor will be calibrated ...

Page 57: ... 1 Switch on the appliance 2 Press and hold the SpeedPerfect and EcoPerfect buttons for 5 s 3 4 The demo programme starts automatically 6 5 2 Starting ending the Bosch demo programme The demo programme must be activated within 15 s after switching on the appliance 2 Switch on the appliance 3 Press and hold the SpeedPerfect and EcoPerfect buttons for 5 s 4 Result The demo programme starts automatic...

Page 58: ...017 05 22 DIS 113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 58 of 85 6 6 Correcting the gap 1 Gap too large 2 Removing worktop 3 Removing installation aid 4 Adjusting retainer on the worktop ...

Page 59: ...Repairs 2017 05 22 DIS 113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 59 of 85 5 Adjusting cross beam if required Result Gap has been adjusted ...

Page 60: ...Aquastop The Aquastop may only be connected in protection area 1 If the Aquastop is in water the socket must lie in protection area 3 or higher and be secured with a 30 mA FI circuit breaker 6 7 1 Inserting extension hose Connect extension hose 6 7 2 Refitting inlet hose with Aquastop 1 In the case of some appliances the Aquastop inlet hose flow through sensor and injection valves constitute a spa...

Page 61: ... The outlet hose may be extended up to maximum 400 cm The outlet hose must be on the floor and must not have more than one connection point 1 Push sleeve onto the end of the outlet hose 2 Also push outlet hose extension into the sleeve 3 Connect outlet hose extension to the waste water connection according to the local conditions ...

Page 62: ...e has been installed on the customer service PC Worktop has been removed New operating and or power module has been installed Control panel has been detached 6 9 1 Connecting UDA to the appliance 1 2 Connect data cable with D Bus connection to KD IS connection on the operating module 3 Connect appliance to the power supply and switch on 6 9 2 Flashing module with I Service 1 Start I Service softwa...

Page 63: ...c Copyright by BSH Hausgeräte GmbH Page 63 of 85 5 6 Press Flash button Result Start flashing window is displayed 7 8 Select operating module in the drop down list and confirm selection with Continue button Result Smart OneClick FP window is displayed ...

Page 64: ...ntil flashing is complete see progress bar Result After the flashing process the remaining time until the Final message is displayed If flashing is not successful an error message is displayed Termination may occur for the following reasons Electrical connection between UDA and electronics faulty Appliance not switched on or no power supply 3D sensor was not electrically disconnected 11 12 Conclud...

Page 65: ...lacing motor Fig 29 Attaching connections of the motor 1 Bolts Prerequisite Rear panel has been removed 6 10 1 Removing motor 1 Remove belt 2 Remove the electrical connection 3 Remove screws from the motor attachment 4 Take motor out of the appliance 6 10 2 Installing motor Install motor in reverse sequence ...

Page 66: ...right by BSH Hausgeräte GmbH Page 66 of 85 6 11 Removing installing the 3G sensor Fig 30 Position of 3G sensor 1 3G sensor with protective cover Prerequisite Rear panel of housing has been removed 6 11 1 Removing the 3G sensor 1 Remove the protective cover ...

Page 67: ...86503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 67 of 85 2 Switch off the electrical connection 1 3 Remove the retaining screws 1 and remove the 3G sensor 6 11 2 Installing the 3G sensor Install the 3G sensor in the reverse sequence ...

Page 68: ...Electrical connection NTC 2 Hexagon head nut 10 mm with retaining clamp Prerequisite Rear panel has been removed Electrical connections have been removed 6 12 1 Removing heater 1 Release hexagon head nut 2 Press retaining clamp and detach to the rear 3 Pull out the heating element 4 Pull out NTC sensor and transfer in the new heater 6 12 2 Installing the heater Install heater in reverse sequence ...

Page 69: ...sor Fig 32 Attachment connections of the NTC sensor 1 Electrical connection 2 Hex nut 10 mm Prerequisite Rear panel has been removed 6 13 1 Removing NTC sensor 1 Disconnect electrical connection 2 Loosen hex nut 3 Pull NTC sensor out of the heater flange 6 13 2 Installing NTC sensor Install NTC sensor in reverse sequence ...

Page 70: ...ecial tool 3 Remove collar nut 4 Remove pulley from the axle 6 14 2 Installing pulley without torque 1 Place pulley on axle 2 Place collar nut on axle and screw on hand tight 3 Attach the pulley to the tub using the special tool 4 Tighten collar nut with a 50 rotation 5 Remove auxiliary tool 6 Mount belt 7 Check correct seating of belt 6 14 3 Installing pulley with torque Required tools Torque wre...

Page 71: ...SH Hausgeräte GmbH Page 71 of 85 6 15 Replacing the soap drawer Prerequisite Worktop VDE cover sheet has been removed Control panel has been removed Front panel has been removed 6 15 1 Removal of the soap drawer 1 Remove the hose clamps 2 Remove the water inlet hoses ...

Page 72: ...Repairs 2017 05 22 DIS 113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 72 of 85 3 Remove the housing of soap drawer Result The housing of soap drawer is removed ...

Page 73: ... drawer complete Siphon hose Hose clamp Required tools 744966 Prerequisite Worktop has been removed Control panel has been removed Front panel has been removed Housing of soap drawer is removed Hose between soap drawer housing and outer tub is removed 6 16 1 Only install new siphon hose 6 16 2 Install siphon hose and soap drawer housing 1 Install siphon on outer tub ...

Page 74: ...Repairs 2017 05 22 DIS 113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 74 of 85 2 Install soap drawer housing 3 Make hose connections ...

Page 75: ...017 05 22 DIS 113_58300000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 75 of 85 4 Make hose connection to outer tub and seal Secure clamp in 4th catch Result Soap drawer housing and hoses are installed ...

Page 76: ... mounting points of the screws decouple the new pump from the housing and thereby muffle the noises during pumping Prerequisite Front panel has been removed 6 17 1 Removing the drain pump 1 Drain residual water via the emergency drainage hose 2 Remove screws 2 and fastenings from the pump 3 Press the pump out of the holder 4 Remove the electrical connection 5 Loosen drainage hose 1 by turning it a...

Page 77: ...ktop has been removed Control panel has been removed Door has been removed 6 18 1 Removing front panel 1 Unhook and remove cover flap from the fluff trap 2 Detach the door seal 3 Remove screws 1 with ratchet spanner 4 Remove screws 2 5 Remove screws 3 6 Detach front panel on the left side 7 Unhook front panel on the right side and remove 6 18 2 Installing the front panel Install front panel in rev...

Page 78: ...y hose flow sensor and injection valves together form a spare part which is replaced in case of a defect Prerequisite Aqua Stop has been removed Worktop has been removed 6 19 1 Removing injection valve 1 Remove cable tie 2 Remove electrical connections 3 Loosen hose clips and remove hoses 4 Remove the retaining screw 5 Disengage catch element 2 ...

Page 79: ...00000186503_ara_en_c Copyright by BSH Hausgeräte GmbH Page 79 of 85 6 Unhook injection valve and rotate by 90 7 Remove injection valve through the rear panel 6 19 2 Installing injection valve Install injection valve in reverse order ...

Page 80: ...s been removed 6 20 1 Removing the power module 1 2 Release outlet hose 1 from the holders 3 Remove cable strap 3 4 Release protective conductor connections 6 5 Release power cord 5 from the holder 6 Using a suitable tool disengage catch element 2 7 Disengage the catch element 4 8 9 Push power module with cover upwards and remove from the inner wall of the appliance ...

Page 81: ...ts Use earthing armband 00341216 13 Release electrical connections 14 Detach power module from the plug in frame 6 20 2 Installing the power module 1 Attach power module to plug in frame 2 Mount electrical connections 3 Attach cover to power module Ensure that the cables are routed correctly 4 Place power module with cover at bottom into the guide rail 5 Attach power module with cover at top 6 Att...

Page 82: ...y BSH Hausgeräte GmbH Page 82 of 85 6 21 Incorrect and correct installation location of display module 1 Incorrect installation location 2 Correct installation location Result When carrying out repairs the contacts must be situated correctly on the contact points ...

Page 83: ...ht by BSH Hausgeräte GmbH Page 83 of 85 6 22 Removing installing the inverter module Prerequisite Rear panel has been removed 6 22 1 Removing the inverter module 1 2 Remove screws 1 3 Remove frictional damper 4 5 Remove cable strap 2 6 Loosen fixing elements 3 ...

Page 84: ...03_ara_en_c Copyright by BSH Hausgeräte GmbH Page 84 of 85 7 8 Loosen locking hook 4 9 Push inverter module in direction of arrow and take out of the appliance 6 22 2 Installing the inverter module Install inverter module in reverse sequence ...

Page 85: ...H Page 85 of 85 6 23 Optionally Noises in inverter area Prerequisite Rear panel has been removed 6 23 1 Inverter module noises Result Inverter module 1 is touching the housing 6 23 2 Eliminating inverter module noise Result Eliminate noise by pulling the inverter module 1 to the left ...

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Bosch WAT28400, Repair Instructions

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