Bosch WTW86560AU Einrichtungshandbuch

Repair Instructions Laundry - Repair Instruction;T22 - Table of content

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1 Concerning this document 2

1.1 Purpose and target group..................................................... 2

1.2 Other applicable documents..................................................2

2 Safety 3

2.1 Qualification........................................................................... 3

2.2 Information in warnings......................................................... 3

2.3 Basic safety instructions........................................................ 4

2.4 Basic warning instructions..................................................... 5

3 Design and function 7

3.1 Fascia.....................................................................................7

3.2 Conductivity measurement.................................................... 8

3.3 Condensate water container..................................................9

3.4 Temperature control with fan (cooling air)........................... 10

3.5 Heat pump circuit................................................................ 11

3.6 Automatic cleaning function.................................................12

4 Fault diagnosis 13

4.1 Malfunctions.........................................................................13

4.2 Result faults......................................................................... 14

4.3 Leaks....................................................................................15

4.4 Odours................................................................................. 16

5 Test 17

5.1 Starting / ending demo programme..................................... 17

5.2 Checking electrodes for measuring conductance................18

5.3 Checking interior light..........................................................19

5.4 Read out fault memory........................................................ 20

6 Repairs 21

6.1 Cleaning the heat pump...................................................... 21

6.2 Installing conversion kit 743988.......................................... 22

6.3 Replacing motor...................................................................23

6.4 Replacing left / right side panel........................................... 24

6.5 Replacing rollers.................................................................. 26

6.6 Removing / installing the cooling-air panel.......................... 27

6.7 Opening / closing refrigeration circuit.................................. 28

6.8 Replacing compressor......................................................... 29

6.9 Replacing fluff filter.............................................................. 30

6.10 Removing / installing front panel......................................... 32

6.11 Cleaning the condenser.......................................................33

6.12 Removing / installing drum bearing..................................... 34

6.13 Transporting the appliance.................................................. 35

Concerning this document

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1.1 Purpose and target group

These repair instructions include information on troubleshooting and repairs.

This information supports the following employees in customer service:

• Service technicians who repair domestic appliances

• Technical storemen in the spare-parts warehouse who determine the required

spare parts

• Call centre employees who take orders

1.2 Other applicable documents

The following documents include additional relevant repair information:

• Documents “Design and function” and “Customer advice”

• Test programmes

• Circuit diagrams

• Exploded drawings

• Parts lists

• Repair videos

Safety

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2.1 Qualification

In Germany repair work may be performed only by electrical engineers who have

been trained by BSH or a centre authorised by BSH.

In all other countries repair work may be performed by comparably trained

technicians only.

2.2 Information in warnings

2.2.1 Danger levels and warning symbols

Warnings are provided in this document with danger levels and warning symbols.

The danger levels consist of a symbol and a warning word. The warning word

identifies the severity of the danger.

Danger level Meaning

Failure to observe the warning will result in death or serious in-

juries.

Failure to observe the warning may result in death or serious

injuries.

Failure to observe the warning may result in minor injuries.

Failure to observe the warning may result in damage.

Table 1: Danger levels

Warning symbols are symbolic illustrations which indicate the type of danger.

Symbol Meaning

General warning

Danger of electric shock

Risk of explosion

Risk of cut injuries

Safety

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Symbol Meaning

Risk of crush injuries

Danger - hot surfaces

Danger - strong magnetic

Danger - non-ionising radiation

Table 2: Warning symbols

2.2.2 Structure

Warnings in this document have a uniform appearance and structure.

Type and source of danger!

Consequences of ignoring the warning.

► Actions to protect from danger.

The following example shows a warning which warns of an electric shock:

High voltage!

Death by electric shock.

► Disconnect appliance from grid.

► Discharge high-voltage capacitor.

2.3 Basic safety instructions

These repair instructions form the basis for a systematic and safety-

conscious procedure for the repair of domestic appliances.

2.3.1 Measures to be taken for each repair

The following dangers are associated with the repair of domestic appliances:

• Danger of electric shock from exposed, live wires and components

• Risk of cut injuries from sharp edges

• Risk of destruction of electronic components by electrostatic discharge

Specific measures prevent injuries and damage. Service technicians are obliged to

take these measures for each repair.

Preventive measures

... against electric shock When carrying out repairs:

• Disconnect appliance from power

supply.

When running tests with power supply

on:

• Use a residual-current-operated cir-

cuit-breaker.

• Select protective conductor connec-

tion less than standard value.

... to prevent cut injuries • wear protective gloves.

... electronic components • wear earthing wrist strap.

• Discharge capacitors.

Table 3: Measures to be taken for each repair

Safety

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2.3.2 Measures to be taken after each repair

State of the appliance Measures

Appliance has been repaired and is

functionally reliable.

• Run tests in accordance with VDE

0701 or comparable national regula-

tions.

• Conduct a performance test.

• Document repair work, tests, mea-

sured values and functional reliabili-

ty.

Appliance is still defective and not func-

tionally reliable.

• Clearly identify appliance as "not

functionally reliable".

• Inform customer in writing about the

lack of functional safety.

Table 4: Measures to be taken after each repair

2.4 Basic warning instructions

Exposed, live components!

Death from electric shock.

► Disconnect the appliance from the power supply.

► Do not touch housing, frame or components.

► If running tests while the power is on, always use a residual

current circuit-breaker.

► Ensure that the resistance of the protective conductor does not

exceed the standardised value.

Discharge current of charged capacitors!

Death from electric shock. Risk of injury from startle response.

► Disconnect the appliance from the power supply.

► Discharge capacitors.

Exposed, defective components live!

Death from electric shock.

► Disconnect the appliance from the power supply.

► Do not touch housing, frame or components.

► If running tests while the power is on, always use a residual

current circuit-breaker.

► Ensure that the resistance of the protective conductor does not

exceed the standardised value.

Safety

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Sharp edges!

Cut injuries.

► Wear protective gloves.

► Wear personal protective equipment.

Touching electrostatically sensitive components!

Destruction of components.

► Apply electrostatic protection system.

► Observe measures to protect the electrostatically sensitive

components.

Unnecessary replacement of sensitive components!

Destruction of components.

► Systematically check components before replacing them.

► Do not replace components without reason.

► Observe technical documentation.

Design and function

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3.1 Fascia

Graphic 1: Fascia

Graphic 2: Fascia

1 Programme selector 5 Low heat / super low heat button

2Menu button 6 Easy-iron / Anti-crease button

3Change button 7 Start / stop button

4 LCD display

Design and function

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3.2 Conductivity measurement

If the load is low, conductivity cannot be measured with precision.

See circuit diagrams: Washing not dry.

Graphic 3: Conductivity measurement in the appliance

1 Conductivity electrode 2 Counter-electrode

The conductivity measurement is a moisture-dependent control.

The conductivity measurement is based on the physical principle that textiles

have a conductivity which varies depending on the moisture. Damp washing has

a higher conductivity than dry washing. The conductivity is measured when the

washing touches an electrode and a counter-electrode which form a measurement

section.

The electrodes are in the end shield. During the drying process the items of

washing continuously touch the electrodes. The preselected degree of drying is

reached when the determined conductance of the washing agrees with a value

specified by the programme selection.

Design and function

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3.3 Condensate water container

3.3.1 Structure

Graphic 4: Components of the condensate water container

1 Filter 3 Tray

2 Drawer 4 Opening

The condensate water container consists of a cover with filter (1) and a chamber

(2) for condensation, as well as a tray (3) with an opening (4) with a downpipe to

the evaporator.

3.3.2 Function

The condensate water is pumped through the filter into the condensate water

container via the condensate pump in the base pan. Fluff in the condensate water

is caught in the filter. The filter is usually cleaned by emptying the condensate

water container, but it can also be removed and cleaned manually. The cleaned

condensate water is collected in one drawer (max. 2 l). The cleaned condensate

water is conveyed through the opening in the tray to the evaporator via a downpipe

and flushes the evaporator.

Design and function

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3.4 Temperature control with fan (cooling air)

3.4.1 Structure

The appliance features two NTC sensors: The NTC sensor B31 in the refrigeration

circuit on the compressor and an NTC sensor on the end shield (optional).

The electronic control is connected to the NTC sensors and controls the

components, via electrical connections, which are required to control the

temperature.

3.4.2 Function

The electrical control controls the fan (cooling air) depending on the selected

programme and the transmitted NTC sensor values:

• From an ambient temperature above 30 °C.

• From a temperature on the NTC sensor B31 above 61 °C.

This prevents actuation of the overheating protection OLP (Over Load Protector)

on the compressor.

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