Bosch WTA4410US Setup guide

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Repair instractions
1SAFETY ........................................................ 2
1.1 SAFETY................................................................................ 2
1.3 EEC ...................................................................................... 3
2INSTALLATION............................................ 5
2.1 Set-up / Installation............................................................. 5
3OPERATION................................................. 6
3.1 Control Panel....................................................................... 6
3.2 Disassembly ........................................................................ 7
3.3 Optimisation buttons optional ........................................... 8
4COMPONENTS............................................. 9
4.1 Power module (optional) .................................................... 9
4.2 Program – Residual moisture ............................................ 9
5FUNCTIONS ............................................... 10
5.1 Removal of safety temperature regulator KI01............... 10
5.2 Removal of safety temperature regulator from KI02..... 11
6REPAIR....................................................... 12
6.1 Facia Panel ........................................................................ 12
6.2 Door ................................................................................... 13
6.3 Interior and outer door ..................................................... 13
6.4 Front Panel ........................................................................ 14
6.5 Bearing plate ..................................................................... 16
6.6 Removal of Drum interior lighting (Optional) ................. 17
6.7 Motor.................................................................................. 18
6.8 Belt removal KI01.............................................................. 19
6.9 Belt Tension adjuster ....................................................... 19
6.10 Removing the Ki03 belt .................................................... 20
6.11 Heating element................................................................ 22
6.12 Disassembly safety temperature regulator KI01............ 23
6.13 Removal of safety temperature regulator KI02 .............. 24
6.14 Removing temperature regulator exhaust air ................ 25
6.15 Drum bearings .................................................................. 26
6.16 Diagnostic-repair tools..................................................... 27
7FAULT DIAGNOSTICS...............................28
7.1 Time jumps........................................................................ 28
7.2 Odour................................................................................. 29
7.3 Leaks ................................................................................. 29
8TECHNICAL SPECIFICATIONS.................30
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1 SAFETY
1.1 SAFETY
DANGER!
Repairs may only be carried out by an electrical specialist!
Inappropriate repairs may cause danger to the user or cause damage
for the user!
To avoid the danger of electric shock, observe the following advice at
all times:
Housing and frame may be live as a result of a fault!
Dangerous body currents may flow as a result of touching live
components within the appliance!
Disconnect the appliance from the mains before repair!
An earth leakage circuit breaker must always be used when testing
while voltage applies!
The protective conductor resistance may on no account exceed the
value given in the standard! It is crucial with respect to both personal
safety and appliance function.
Following repair, tests must be carried out according to VDE 0701 or
according to regulations specific to the country concerned!
Following repair, both function tests and leak tests must be carried
out.
WARNING!
Observe the following advice at all times:
When carrying out a measurement according to VDE 0701 using the
connecting plug, the safety test must be carried out as described in
the circuit diagrams.
Component may carry an electrostatic charge! Follow
the handling regulations
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1.3 EEC
1.1.1 Description
Electrostatically -
Endangering -
Components
1.1.2 Generally
Economy, environmental protection, control comfort, high functionality
and working reliability are realized with electrical household
appliances by the insertion of most modern electronics. This high-
quality technology requires a professional handling and a competent
specialized knowledge.
All electronic modules are equipped with components, which are
endangered by an electrostatic voltage.
1.1.3 Endangered coponents
The following elements are endangered by electrostatic voltage:
►µProcessors and IC`s
►Transistors, thyristors and Triac`s
►Diodes
1.1.4 Causes and effect
They lead an electrostatic voltage with itself:
►of up to 35,000 V, if you walk over a non conductive carpet,
►of up to 12,000 V, if you walk over a non conductive PVC soil
►and of up to 1,800 V, if you sit on a padding chair.
The electrostatic voltage of their body is passed to electronics and
EEC`s affected by them, which are possibly damaged thereby.
Dead
►A defect part
►A defect component
►A defect appliance
Slightly hurt
►Damaged
►Weakened
►Early failure
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1.1.5 EEC – Notes
On all electronics modules and electronics components are
electrostatically endangered elements
.
For the protection of these electrostatically endangered elements the
following measures are to be met:
Noticing the appropriate marking of the components and modules:
Put on before contact and measurement of the EEC`s a electrostatics
protective system (bracelet with grounding component).
Avoid the contact of EEC`s with rechargeable plastics (foils etc.).
Components, modules and PC-boards are to be touched in such a
way that the conductive strips or connections are if possible not
affected.
EEC`s may arrive not too close at monitors and televisions.
Use for transport only conductive materials or the original packaging.
1.1.6 Electrostatics protective system
The electrostatic voltage of the body is derived over the bracelet and
the grounding component.
This takes place for safety reasons not directly, but over a resistance
combination.
The ground connection and/or protective grounding binding must be
perfect!
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2 INSTALLATION
2.1 Set-up / Installation
The appliance must be located firmly and at floor level. Use a water-
level.
A Exhaust air hose max. 2
m
B Power supply cable 1.5m
►The feet are adjustable for height.
►The dryer can neither be built in nor set up under an
appliance. ►Loosen the counter nuts. Adjust the feet so that the appliance
is at floor level. Then tighten the counter nuts.
►The dryer can be set up in combination with a washing
machine (front loader). To ensure a reliable connection you
have to use the original connection kits (see operation
instruction).
►The set-up place should be chosen in a way that the minimum
distance of 10 cm to the wall can be kept.
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3 OPERATION
3.1 Control Panel
A Programme selector B Programm progress indicator
C LED - Modul (Optional) D Additional funcations
E Start button
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3.2 Disassembly
►Worktop Disassembly.
►3 screws on the panel disassembly (B).
►Panel forward overboard end to upturn.
A Screws button and Modul
B Screws panel
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3.3 Optimisation buttons optional
Low heat button:
For temperature-sensitive textiles.
Lowers the temperature by reducing the heat output, the drying time is
extended simultaneously.
Signal:
For switching on the signal and drawing attention to the end of the
programme.
Start:
When a programme starts, a brief acoustic signal sounds when the
signal is switched on.
Start time delay:
The start time of the programme can be delayed up to 19 hours. A dot
flashes on the display. The selected time elapses in 1 h steps.
Programme progress indicator (status)
The programme sequence is indicated by LEDs.
Anti-crease
At the end of the 10`of colldown the program starts its anti-crease
phase. It can be interrupted by the user anytime. The Anti-crease is
limited on 60 min
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4 COMPONENTS 4.2 Program – Residual moisture
The programs "Easy care" and "Cotton / Color laundy" damp-steered
and after reaching the drying goal or the maximum running time (180
min) were terminated. A cooling phase of 10 min follows. At the end of
the cool down phase a signal of 5x1sec.sounds.
4.1 Power module (optional)
Description of function
The module contains all components, like regulation, microprocessor
and relay. It takes over functions of the control of expirations of drying,
determination of parameters as well as the control of motor and
heating.
Residual moisture:
Cotton- / Color laundry
Extra dry -4%
Conductance measurement Wardrobe dry plus -2%
The drying goal is determined by a conductance measurement. The
conductance measurement is attributed to a resistance test.
Wardrobe dry 0%
Easy dry 6%
Ironing dry 12%
Easy care
Very dry 0%
Wardrobe dry 2%
Easy dry 6%
Ironing dry 12%
Anti crease protection
The time for the “Anti crease protection” is limited on 60 min. An
prolongation time is not possible.
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5 FUNCTIONS
5.1 Removal of safety temperature regulator KI01
At the bottom channel cover the safety temperature regulator is
installed. The safety temperature regulator switches
switching off temperature: 120 °C +/- 3K
Safety temperatur by ca. 150 °C +/- 4K
A Temperature regulator processing air
B Safety temperature regulator
Hinweis
The safety disconnection may not be put back. The conversion kit
447311 must be inserted. See disassembly safety temperature
regulator KI01
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5.2 Removal of safety temperature regulator
from KI02
At the bottom channel cover the safety temperature regulator is
installed. The safety temperature regulator switches
switching off temperature: 120 °C +/- 3K
Safety temperatur by ca. 150 °C +/- 4K
Hinweis
Safety temperature regulator 150°C
B
After elimination of errors the safety temperature regulator can be put
back.
Temperatur regulator100°C
C
Current linkage
D
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6 REPAIR
6.1 Facia Panel
6.1.1 Dismantle facia panel
►Dismantle work top plate
►Above the facia panel remove 5 screws (B)
►Release facia panel forward and then turn upward.
►Take off the data line from electronics at the facia panel.
►Remove selector switch, switch holder and operating lamp.(A)
A Screws at the electronic
B Screws facia panel
A Screws selector switch holder
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6.2 Door 6.3 Interior and outer door
The outer door and internal door are only with one another clipped Removal of the Interior and outer door
►The outside -und internal door are only with one another rest.
►At the hinge opening with a slotted bolt turner set and outer
door of the internal door release.
Removal of the Door
►Take off the two crews at the door with a Phillips screwdriver
to loosen and dismantle the door.
►Remove the hinge support.
outer door internal door
Mounting
Outside -und internal door it rests in such a way that the inside and
outer door sit again parallel.
►With a slot screwdriver release at the hinges opening the
respective side.
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1 walked
6.4 Front Panel
Dismantling Front Panel
►Remove work top panel.
►Dismantle Facia Panel
►Door removal.
►Take off all screws (A/B/C und D)
►Electronics and wiring harness solve and take away front
panel.
A 2 Screws PC-Board
B Screws facia panel and front panel
C 7 Screws bearing panel
D 3 Screws bottom panel
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►Electrical connections from the drum interior lighting and door
switch take off. 3 walked
2 walked
A Plugs drum lighting and door switch
►Develop after front front of.
►Cable straps loosen and wiring harness with key bank
dismantle.
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6.5 Bearing plate
Picture 2
Disassembly bearing plate
►Remove work top plate and facia panel.
►Remove front panel.
►Disconnect the electrical connection to the drum interior
lighting.
►Take away the door switch.
►Screws (A) dismantle. Bearing plate on the left and on the
right release and develop forward.
►Temperature regulators and exhaust air duct dismantle.
Picture 1
A Bearing plate B Latch hook bearing plate
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6.6 Removal of Drum interior lighting (Optional)
►Remove the top work panel
►Remove the facia panel.
►Take of the plug of the lamp.
►Remove the lamp cover.
►Release the retaining tie-clip with a slot screwdriver.
A Support clip B Lamp socket
A Electrical connections
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Pic 1
6.7 Motor
The Drying Phase:
Motor rhythm: 118s right 3s off 118s left.
The Cool down Phase:
When the required humidity threshold or the time of the sequence are
reached, the program starts its cool down phase. It lasts 10min.
Motor rhythm: 3s Off 118s right 3s Off 118s left.
Pic 2
Motor removal
►Take off back panel.
►Take away lower half of the heater channel.
►Put the appliance on the side put to open the base plate.
►Fix the motor shaft with 10 mm ring spanner.
►With a 13 mm ring spanner take off the exhaust wheel
►Release the belt through the opening in the base plate.
Take away the four screws of the motor at the base plate and Pic 3
Take the motor out through the opening in the base plate.
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6.8 Belt removal KI01 6.9 Belt Tension adjuster
►Take of the opening cover on the base plate. ►Put the appliance on the backside.
►Remove the belt from the belt tension adjuster. ►Open the opening ion the base plate.
►Take off work top panel, facia panel, front panel and bearing.
(see dismantling bearing plate.)
►Take off the belt.
Remove the two screws of the belt tension adjuster at the base plate
and take off belt tension adjusters over the opening in the base plate.
6.8.1 Belt mounting
►Draw up the belt over the drum
►Hang up and bolt bearing plate
►Stretch the belt with the belt tension adjuster
►Close the opening on the base
►Montage of the front panel, facia panel and work top panel.
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Step 3
6.10 Removing the Ki03 belt
Protective gloves must be worn
1. Remove the worktop.
2. Remove the rear panel.
3. Pull off the electrical connections Ffor the heater and
temperature controller.
4. Remove the bottom process air duct cover.
5. Remove the process air impeller.
6. Detach the belt over the drum.
7. Remove the two top screws Aon the process air duct.
8. Thread the belt between the process air duct and housing.
9. Insert and tighten the two screws Ayou removed earlier.
10. Remove the two bottom screws B on the process air duct.
11. Press the duct back and thread the belt between the housing
and process air duct (see step 8).
12. Remove the belt.
Stretch belt before assembly!
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