BOSCH WFMC6400 Service manual

1

WFMC Washer Training Program

WFMC WASHER TRAINING MANUAL

1st Edition/Revision 6 (2/2/04)

2

WFMC Washer Training Program

Features and Benefits

••Features and Benefits

Product Description

••Product Description

Warranty

••Warranty

Installation

••Installation

Operation

••Operation

Disassembly

••Disassembly

Reassembly

••Reassembly

Wiring Diagram

••Wiring Diagram

Service Tips

••Service Tips

1st Edition/Revision 6 (2/2/04)

3

Features and Benefits

•

True American sized drum & tub

Full sized opening

Tilted tub to facilitate door seal draining

Very energy efficient --

Very energy efficient

Stainless steel drum --

Stainless steel drum

clothes

Uses little water

Tier water fill for fast & equal water fill

33--Tier water fill for fast & equal water fill

180° door opening

(easier loading and unloading)

Energy Star rated

won’t rust & is gentle to

•

Up to 5 rinses

Suds sensing --

Suds sensing

Unbalanced load sensor --

Unbalanced load sensor

load

UL listed (U.S. & Canada)

rinses out suds leaving no soap film

adjusts spin to balance

1st Edition/Revision 6 (2/2/04)

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Extra Features and Benefits

•

Continuous cycle notification --

Continuous cycle notification

Electronic control

Accurate water level control independent of water

pressure

Digital clock (am/pm format)

Real time cycle finish

stops)

(displays actual time of day cycle

digital display

--

WFMC6400

•

Real time delay

Reduced ironing

Interactive language display --

Interactive language display

(English, French, Spanish)

Continuous suds sensing

Child lockout

(enter actual time of day for wash to end)

choose desired language

1st Edition/Revision 6 (2/2/04)

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Product Description

Electronic controls

••Electronic controls

Guaranteed temperatures

••Guaranteed temperatures

Large capacity

••Large capacity

Detergent & softener dispenser

••Detergent & softener dispenser

Regular/Cotton, ,

••Regular/Cotton

Delicates

180º door opening

••180º door opening

Stainless steel inner drum

••Stainless steel inner drum

Durable

••Durable

Power Wash (

••Power Wash (

&

Polinox

& door opening

Permanent Press, ,

Permanent Press

Hand Wash

outer drum

WFMC32

)), , Bleach

settings

Bleach, ,

UL listed (U.S. & Canada)

••UL listed (U.S. & Canada)

Drain hose & cord holder

••Drain hose & cord holder

Electronic

controls

Adjustable

spin speeds

Rinse Plus

(

WFMC64

(

Adjustable spin speeds

••Adjustable spin speeds

&

Reduced Ironing

&

Reduced Ironing

buttons

))buttons

Safety

door lock

Accessible drain trap

(for servicers only)

Star rated

1st Edition/Revision 6 (2/2/04)

Energy

6

Warranty

Bosch Washers Limited Lifetime Warranty

Statement of Limited Warranty

The warranties provided by BSH Home Appliances ("Bosch") in this Statement of Warranties apply only to Bosch clothes washers sold to the first using purchaser by Bosch or its authorized dealers, retailers or service centers in the United States or Canada. The Warranties provided herein are not transferable, and take place from date of installation or ten business days after delivery date, whichever comes first.

1 Year Full Limited Warranty

Bosch will repair or replace, free of charge, any component part that proves defective under conditions of normal home use, labor and shipping costs included. Warranty repair service must be performed by an authorized Bosch Service Center.

2 Year Limited Warranty

Bosch will provide replacement parts, free of charge, for any component part that proves defective under conditions of normal home use, shipping costs included, labor charges excluded.

For location of nearest repair depot call 1--

For location of nearest repair depot call 1

(Pacific time)

800--

800

944--

944

2904 from 5:00 AM --

2904 from 5:00 AM

5:00 PM M--F F

5:00 PM M

1st Edition/Revision 6 (2/2/04)

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Warranty

--

Serial # Label

The serial # label, located on the front of the washer next to the door hinge, shows necessary warranty information.

Serial #

label

• Model # - “WFMC6400UC/01”.

• Serial # - “FD 8308”. To find when the product type

was built, add 20 to the 1st two digits to get the year (83 + 20 = 103  product type was built in 2003). The last two digits show the month (08 = August).

Factory serial # - Can convert

factory serial # to FD # for warranty use. 1st 2 digits show factory # (85 = New Bern), 3rd digit shows year (1 = 2003), 4th & 5th digits show month built (08 = August). So, serial # starting with “85308…400126” = washer built @ New Bern with FD 8308

000126.

1st Edition/Revision 6 (2/2/04)

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Installation

--

Reprint of Installation Instructions (1)

NOTE: Be sure to follow all

national & local codes.

1st Edition/Revision 6 (2/2/04)

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Installation

--

Reprint of Installation Instructions (2)

HINT: To quickly

remove shipping (transport) bolts, use a 13mm socket wrench.

HINT: To avoid damaging washer, don’t move

it while the feet (leveling legs) are extended.

1st Edition/Revision 6 (2/2/04)

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Installation

--

Reprint of Installation Instructions (3)

HINT: Cold & hot water

connections are clearly marked on the rear of the washers.

HINT: To eliminate possibility of leaking,

don’t overtighten fittings. Teflon tape can also be used on all threads.

HINT: Be sure to remove the transport

(shipping) bolts & keep them near the washer (for future shipment).

1st Edition/Revision 6 (2/2/04)

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Operation

WFMC3200UC

--

Fascia Panels

WFMC6400UC

1st Edition/Revision 6 (2/2/04)

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Special Wash

Buttons

Operation

WFMC3200UC

Digital

Display

--

Cycle Selector

Controls

Knob

Both have Regular/ Cotton, Permanent Press, Delicates, Hand Wash, Temperature Boost, Rinse Plus &

WFMC6400UC

Bleach settings.

1st Edition/Revision 6 (2/2/04)

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Operation

1A. Load Sensor (WFMC3200UC)

At a predefined points during the initial fill, the washer determines if it needs more water using a pressure switch. This is due to differences in the absorption of the laundry and the size of the loads.

1B. Dynamic Load Sensor (WFMC6400UC)

During the entire fill the washer continually adjusts for the size of the load and determines if more water is needed using an analog pressure switch and a flow meter.

2. Digital Temperature Sensor (WFMC3200UC & WFMC6400UC)

The thermostat monitors the temperature of the water and controls the length of time the heating element is on, ensuring the proper temperature for the chosen cycle.

3A. Suds Sensor (WFMC3200UC)

During the beginning of the1st rinse/spin phase, the washer determines if there are excessive suds and automatically adds 2 rinses (if necessary). This is accomplished via the pressure switch and the motor synchronization system.

--

Sensors (1)

3B. Continuous Suds Sensor (WFMC6400UC)

Checking the pumping out phase of the main wash, the beginning of the 1st rinse/spin phase and the actual spin speed vs. the programmed spin speed, the washer determines if there are excessive suds and automatically adds up to 2 rinses (if necessary). This is accomplished via the pressure switch, analog pressure switch and the motor synchronization system.

4. Unbalanced Load Sensor (WFMC3200UC & WFMC6400UC)

During the final spin cycle the washer monitors the positioning and balance of the load. If the load unbalanced, the washer stops and adjusts the load up to 15 times and reduces the spin speed to finish the cycle. This is accomplished via the motor synchronization system.

1st Edition/Revision 6 (2/2/04)

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Operation

--

Sensors (2)

1A/1B. Load & Dynamic Load Sensors

Mechanical Pressure Switch - (WFMC3200UC & WFMC6400 UC) measures the water

level after the first fill. If the water level is high (like for smaller loads), the pressure increases and the pressure switch does not provide more water.

Analog Pressure Switch - (WFMC6400UC)

• Precise measuring of actual water level

• Accurate load detection

Analog

Pressure

Switch

Mechanical

Pressure

Switch

• Control of the pump - noise reduction

• Time reduction - no pumping when empty

BENEFITS: Continuous adjustment of wash times

Water and energy consumed varies according to load size

1st Edition/Revision 6 (2/2/04)

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Operation

--

Sensors (3)

1A/1B. Flow Meter

 Exact monitoring of water inflow.  Ensures exact control of water inlet valves so that there is always the right amount of water for wash and

rinse cycles.

 Together with the pressure switch, there is a continuous adjustment of wash time, water and energy in

relation to the load size.

 The flow meter works independently of water pressure.

BENEFITS: Minimizes water consumption

Exact Load Detection Superior Cleaning Performance

• An internal water clock monitors water inflow via soak compartment.

• Ensures exact control of water inlet valves - always right amount of water.

• Independent from water pressure.

1st Edition/Revision 6 (2/2/04)

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Operation

--

Sensors (4)

2. Digital Temperature Sensor

Both models are equipped with an Electric Heater and Temperature Sensor (NTC) to deliver guaranteed

NOTE: Compare with competition

washers which only have heaters in top of the line models.

Heater

wash temperatures.

Thermostat (NTC)

1st Edition/Revision 6 (2/2/04)

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Operation

--

Sensors (5)

3A/3B. Suds & Continuous Suds Sensors

WFMC6400

WFMC6400 WFMC3200

 Detection during draining out after main wash

 immediate additional rinse & cancelling of 1st rinse spin

 Detection during 1st rinse spin

 immediate interuption of spin

 insertion of one or two additional rinses

 reduced agition during additional anti foam rinse

WFMC6400

NOTE: Suds build-up usually occur only when way too

much detergent is used with lightly soiled loads.

 Detection during any other rinse spin

 immediate interuption of spin  reduced agitiation in following rinse cycle

 All subsequent rinse spin cycles are always rechecked for suds

1st Edition/Revision 6 (2/2/04)

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Operation

--

4. Unbalanced Load Sensor

• Accurate measuring of unbalance by deviation of spin speed and slow down

time of drum

• Infinite adapting of spin speeds

• Compensates reducing of spin speeds by prolonging spinning times

• Will attempt up to 15 times to redistribute a load

Sensors (6)

2-step detection

Advantages

• Reduction of noise

• Better stability of machine

• Good spinning results with big unbalances

:

1st Edition/Revision 6 (2/2/04)

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Operation

4. Unbalanced Load Sensor

1200

1000

800

600 400

Spin speed [rpm]

200

0

max. 15 trials

--

Sensors (7)

2-step detection

IV

I II

III

load distri bution unba l ance Spi n spe e d (rpm) spinni ng profile

good small 1200 (max.) I uneven medium 1000 (reduced) II bad big 800 (low) III none dangerous no spinning IV

After 4 attempts After 7 attempts After 14 attempts

1st Edition/Revision 6 (2/2/04)

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Operation

Unlike WFK, WFL & WFR washers, drain pumps are maintenance-free. So, larger objects such as coins and paper clips are no longer collected in the drain pump trap. The drain pump trap is only meant to be cleared by servicers.

HINT: To remove the drain pump

access cover, insert a pointed object (or tool) into the hole, push in to release the latch and rotate the cover clockwise.

--

Cleaning Drain Pump Trap

Current production pumps are beige

color – earlier pumps were black.

NOTE: There’s no provision to drain

water manually from drain pumps like earlier models.

1st Edition/Revision 6 (2/2/04)

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Operation

Unlike WFK, WFL & WFR washers, WFMC washers have tilted tubs and flow through tub paddles to help prevent water collecting in door seals and to enhance wash water flowing through clothes.

–

Preventing Water Collecting in Door Seals

Paddles direct water toward front of washer – water drains into paddles from outside of inner drum, flows toward front of paddles and exits holes in front of paddles onto clothing in front of washer.

Directing water away from door seals:

• Drums are tilted to direct water to the back of the drum and away from the door seal.

• Door glass is shaped to direct water away from the door seal.

• Paddles insure clothing at front of dryer get wet despite tub being tilted toward the back.

1st Edition/Revision 6 (2/2/04)

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Disassembly

To remove fascia panel to access control module & dispenser, remove (4) T-20 Torx front/side screws and lift panel up. Caps over screws can be removed using fingernails or a sharp knife – take care not to scratch fascia panel or caps.

–

Fascia (Control) Panel (1)

T-20 screws

When reassembling panels, tuck rear tabs under top

st

panel 1

.

Knobs are permanently attached to panels and cannot be removed.

1st Edition/Revision 6 (2/2/04)

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Disassembly

Control modules can be readily removed from fascia panels, but there’s a knack to it – must use the procedure below exactly as shown

Start from left side Pry outer & inner tabs together L – R Pry out (3) inner tabs + all outer tabs

–

Fascia (Control) Panel (2)

.

HINT: Don’t force modules out

from fascia panels to avoid breaking plastic parts. If modules don’t come out easily, the procedure hasn’t been followed and plastic parts will break.

HINT: Don’t remove the wire

holders – clip off wire ties instead. Carry extra wire ties to reattach wire harnesses.

HINT: The knob does NOT

have to be removed to remove the control module. The module lifts off completely from the panel, knob & buttons.

1st Edition/Revision 6 (2/2/04)