Electrolux Washing machines with EWM 1000 PLUS User manual

SERVICE MANUAL
WASHING
©ELECTROLUX HOME PRODUCTS
ITALY S.p.A.
Spares Operations Italy
Corso Lino Zanussi, 30
Publication no.
I - 33080 PORCIA /PN 599 38 47-87
Fax [phone]
Edition: 2006-11-29
EN
Washing machines with
EWM 1000 PLUS
electronic control system
and
“AEG Nexxxt”
display board
With sensor
ARCHED cabinet

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CONTENT
1Purpose of this manual.............................................................................................................................. 5
2PRECAUTIONS......................................................................................................................................... 5
3GENERAL CHARACTERISTICS............................................................................................................... 5
4CONTROL PANEL..................................................................................................................................... 6
4.1 Control/display board.......................................................................................................................... 7
4.1.1 Version with display:.................................................................................................................... 7
4.2 Washing programmes......................................................................................................................... 8
4.2.1 Configuration of the programmes................................................................................................ 8
4.3 Programme selector ........................................................................................................................... 8
4.4 Start/Pause......................................................................................................................................... 8
4.5 Functions of the buttons ..................................................................................................................... 8
5WASHING PROGRAMMES AND OPTIONS ............................................................................................ 9
5.1 Programmes ....................................................................................................................................... 9
5.2 Options of the washing cycle............................................................................................................ 10
5.3 Description of options....................................................................................................................... 11
5.3.1 Night cycle................................................................................................................................. 11
5.3.2 Rinse-hold ................................................................................................................................. 11
5.3.3 Pre-wash.................................................................................................................................... 11
5.3.4 Soak........................................................................................................................................... 11
5.3.5 Stains......................................................................................................................................... 11
5.3.6 Short (daily) ............................................................................................................................... 11
5.3.7 Very short .................................................................................................................................. 11
5.3.8 Economy / Energy label............................................................................................................. 11
5.3.9 Sensitive.................................................................................................................................... 12
5.3.10 Extra rinse ................................................................................................................................. 12
5.3.11 “Half load” button....................................................................................................................... 12
5.3.12 Easy-Iron ................................................................................................................................... 12
5.3.13 Reduced spin speed.................................................................................................................. 12
5.3.14 No spin....................................................................................................................................... 12
5.3.15 Modifying the spin speed........................................................................................................... 12
5.3.16 Time reduction (Quick).............................................................................................................. 12
5.3.17 Temperature adjustment ........................................................................................................... 12
5.3.18 “Exclusion of the buzzer”........................................................................................................... 13
5.3.19 Delayed-start time ..................................................................................................................... 13
5.4 Variation of the rinses according to the options................................................................................13
5.5 Display (some models)..................................................................................................................... 14
5.6 LEDs................................................................................................................................................. 14
6TECHNICAL CHARACTERISTICS.......................................................................................................... 15
6.1 EWM1000 Plus Electronic control .................................................................................................... 15
6.1.1 Functions of the circuit board .................................................................................................... 15
6.1.2 Memory in the control system ................................................................................................... 15
6.2 Power supply and programme selection .......................................................................................... 17
6.3 Door interlock.................................................................................................................................... 17
6.3.1 Voltmetric interlock with PTC..................................................................................................... 17
6.3.2 Instantaneous door interlock ..................................................................................................... 18
6.4 Control pressure switch for water level in the tub............................................................................. 19
6.4.1 Pressure switch settings............................................................................................................ 19
6.5 Water fill system ............................................................................................................................... 20
6.5.1 Calculation of flow rate.............................................................................................................. 20
6.6 Drain pump ....................................................................................................................................... 21
6.7 Anti-flooding device .......................................................................................................................... 21
6.8 Water Control (not in all models)...................................................................................................... 22
6.9 Heating.............................................................................................................................................. 23
6.9.1 Heating element ........................................................................................................................ 23
6.9.2 Temperature sensor.................................................................................................................. 23
6.10 Motor............................................................................................................................................. 24
6.11 Power supply to motor .................................................................................................................. 24
6.12 Anti-foam control system............................................................................................................... 24
6.13 “FUCS” (Fast Unbalance Control System).................................................................................... 25
7DEMO Mode ............................................................................................................................................ 27
7.1 Demo mode setting........................................................................................................................... 27
7.2 Exiting demo mode........................................................................................................................... 27

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8DIAGNOSTICS SYSTEM ........................................................................................................................ 28
8.1 Access to diagnostics system........................................................................................................... 28
8.2 Exiting diagnostics system................................................................................................................ 28
8.3 Phases of the diagnostics test.......................................................................................................... 28
8.3.1 Display board diagnostics.......................................................................................................... 30
8.3.2 Programme selector.................................................................................................................. 30
9ALARMS .................................................................................................................................................. 31
9.1 Displaying the alarms to the user ..................................................................................................... 31
9.1.1 Alarms displayed during normal operation................................................................................ 31
9.2 Reading the alarm codes.................................................................................................................. 32
9.2.1 Displaying the alarm.................................................................................................................. 32
9.2.2 Examples of alarm displays....................................................................................................... 32
9.2.3 Operation of alarms during diagnostics..................................................................................... 33
9.3 Notes about some alarms................................................................................................................. 33
9.4 Rapid reading of alarm codes........................................................................................................... 33
9.5 Cancelling the last alarm .................................................................................................................. 33
9.6 Table of alarm codes........................................................................................................................ 34
10 BASIC CIRCUIT DIAGRAM................................................................................................................. 36
10.1 Diagram (without Water Control)................................................................................................... 36
10.1.1 Key to circuit diagram................................................................................................................ 37
10.2 Diagram (with Water Control)........................................................................................................ 38
10.2.1 Key to circuit diagram................................................................................................................ 39

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1 Purpose of this manual
The purpose of this manual is to provide service engineers who are already familiar with the repair procedures
for traditional washing machines with information regarding appliances fitted with the EWM 1000 plus electronic
control system.
The electronic control system plus EWM1000 plus consists of a main electronic board and one
control/display board, “Aeg Nexxxt” version.
The following are described:
•General characteristics
•Control panel and washing programmes
•Technical characteristics
•Guide to the diagnostics
For detailed information concerning hydraulic circuit, structural characteristics of the appliances and
accessibility, please refer to Service Manual of washing machines with ARCHED cabinet (publication no.
599 376782).
2 PRECAUTIONS
Electrical appliances must be serviced only by qualified Service Engineers.
Always remove the plug from the power socket before touching internal
components.
3 GENERAL CHARACTERISTICS
Programme selector 24-position with incorporated general switch
Serial port DAAS-EAP communications protocol up to 38400 baud
Power supply 220/240V
50/60 Hz (configurable)
Type of washing Traditional
with “eco-ball” sphere
Rinsing system Traditional
Motor Collector, with tachometric generator
Spin speed 850 ÷1600 rpm
Anti-unbalancing
system FUCS
Water fill 1 solenoid valve with 1 inlet – 2 or 3 outlets
Detergent drawer 3 compartments: prewash/stains, wash, conditioners
4 compartments: prewash/stains, wash, conditioners, bleach
Control of water level in
the tub
two-level pressure switch: 1st level and anti-boiling safety level (the other
levels refer to fixed-time fills)
possibility of three-level pressure switch: 1st level, anti-boiling and anti-
flooding safety levels
Door safety device Traditional (with PTC)
Instantaneous
Power of heating
element Up to 1950W
Temperature control NTC sensor
Sensors Water Control

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4 CONTROL PANEL
The configuration of the control panel depends on the following:
ªType of control/display board
ªProgramme selector
ªDesign of the control panel (no. of buttons, LEDs)
ªDifferent configuration of the buttons
Example of control panel:
Buttons:
- max. 9, horizontally
LEDs:
- max. 27
Display:
- 3 digits with 24 red LEDs

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4.1 Control/display board
4.1.1 Version with display:
Ö3 digits
Ö27 LEDs: 26 red, one bicolour (red and green)
Ö9 buttons
Version without display:
Ö26 LEDs: 25 red, one bicolour (red and green)
Ö8 buttons

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4.2 Washing programmes
4.2.1 Configuration of the programmes
The table below lists the parameters that can be used to define the washing programmes.
Types of fabrics Cotton/linen, Synthetics, Delicates, Wool, Hand-wash
Special programmes Soak, Rinses, Spin, Drain, Conditioner
Temperature Normal, Maximum: the initial temperature is the maximum that
can be selected for a specific washing programme
Spin Normal, Minimum, Maximum
Options (Normal/Possible) Bleach, Economy (energy label), Stains, Short, Very short, Reduced spin speed, Night-time cycle, Half-load, Easy-Iron,
Rinse Hold, Extra rinse, Pre-wash, Soak and Sensitive
Programme phases Pre-wash, Wash, Rinses, Spin, Economy, Delayed start
4.3 Programme selector
The programme selector defines the type of washing cycle (ex: water level,
drum movement, no of rinses) and washing temperature to be selected
according to the type of wash.
The programme selector can be rotated both clockwise and anti-clockwise.
The first position is used to cancel the current programme and to switch the
appliance off, if the main switch is incorporated in the selector.
4.4 Start/Pause
Start: after selecting the programme and the desired options, press this button to start. If the delay time ahs
been selected, the countdown will begin and the display will indicate it. The LED stops flashing and
remains lit for the whole duration of the programme.
Pause: by pressing the button again, the current programme is interrupted and the display or the
corresponding LED starts flashing. During the pause phase it is possible to open the door only if the
machine is not during the heating phase, the water level is not high and the drum is not moving.
During the pause it is possible to modify the programme as follows:
- the OPTIONS of the cycle can be modified before the phase by which they have to be performed
- the SPIN can be modified before the final spin
To re-start the programme press the START/PAUSE button again.
4.5 Functions of the buttons
The washing programmes and the functions of the single buttons vary for the different models, since
they are determined by the configuration operation of the appliance.

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5 WASHING PROGRAMMES AND OPTIONS
5.1 Programmes
The washing programmes can be configured. The basic programmes are listed in the table below.
Programme Temperature (°C) Number of rinses Final spin (rpm)
90 87
90E 67
60 60
60E 50 (*)(**)
50 50
50/40E 44 (*)
40 40
30 30
Cotton
cold 20
3 450/650/850/1000/1200/
1300/1400/1600
60 60
60/50E 42 (*)
50 50
40 40
30 30
Synthetic
fabrics
cold 20
3 Max. 900
40 40
30 30
Delicates cold 20 3 450/700
40 40
30 35
Wool cold 20 3 Max. 1000
40 40
30 35
Hand-wash cold 20 3 Max. 1000
Soak 30/20 ---- ----
Rinses ---- 3 Max. 1600
Delicate rinses ---- 3 Max. 700
Conditioner ---- 1 Max. 1600
Drain ---- ---- ----
Spin ---- ---- Max. 1600
Delicate spin ---- ---- Max. 700
Mini 30 2 Max. 1000
(*) “Energy label” programmes
(**) Pro
g
ramme Grou
p
Tem
p
erature
(
°C
)
G18 50
G19 53
G20 45
COTTON 60 E
G22 47

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5.2 Options of the washing cycle
The selection of the options is to be carried out after switching on the appliance and setting the desired
programme with the selector and before pressing the start/pause button.
When the button is pressed, the corresponding LED lights; by pressing it again the LED switches off.
Possible options according the selected programme
OPTIONS
Rinse-hold
Night cycle
Pre-wash
Soak
Stains
Daily
Short
Economy
Sensitive
Extra rinse
Bleach
Half-load
Easy iron
Reduced spin
s
p
eed
No spin
90°C X X X X X X X X X X X X X X X
60°C X X X X X X X X X X X X X X X
50°C X X X X X X X X X X X X X X X
40°C X X X X X X X X X X X X X X X
30°C X X X X X X X X X X X X X
COTTON
Cold X X X X X X X X X X X X X
60°C X X X X X X X X X X X X X
50°C X X X X X X X X X X X X X
40°C X X X X X X X X X X X X
30°C X X X X X X X X X X X
SYNTHETIC
FABRICS
Cold X X X X X X X X X X X
30°C X X X X
MINI PROGRAMME
Cold X X X X
40°C X X X X X X X X
30°C X X X X X X X X
DELICATES Cold X X X X X X X X
40°C X X X X
30°C X X X X
WOOL – HAND-
WASH Cold X X X X
SOAK
RINSES X X X X X X X X
CONDITIONER X X X X X
DRAIN
Compatibility with PROGRAMMES
SPIN X
RINSE HOLD X X X X X X X X X X X X X
NIGHT CYCLE X X X X X X X X X X X
PRE-WASH X X X X X X X X X X X X
SOAK X X X X X X X X X X X X
STAINS X X X X X X X X X X X X
DAILY X X X X X X X X X X X X
SHORT X X X X X X X X X X X X
ECONOMY X X X X X X X X X X X X
SENSITIVE X X X X X X X X X X X X X
EXTRA RINSE X X X X X X X X X X X X X X
BLEACH X X X X X X X X X X X
HALF LOAD X X X X X X X X X X X X X X
EASY IRON X X X X X X X X X X X X X
REDUCED SPIN SPPED X X X X X X X X X X X X
Compatibility with OPTIONS
NO SPIN X X X X X X X X X X X X
PRE-SELECTION X X X X X X X X X X X X X X X
PRE-WASH X X X X X X X X X X X X X
WASH X X X X X X X X X X X X X
RINSES X XX
Ph
ases
i
n
which
selection is
possible
SPIN XX

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5.3 Description of options
5.3.1 Night cycle
ªEliminates all spin phases and adds three rinses in COTTON cycles and two rinses in SYNTHETICS
cycles.
ªStops the appliance with water in the tub before the final rinse.
ªSwitches off the buzzer (if configured)
ªTo drain the water select a drain or spin cycle.
5.3.2 Rinse-hold
ªStops the appliance with water in the tub before the final spin cycle.
ªSwitches off the buzzer (if configured)
ªTo drain the water select a drain or spin cycle.
5.3.3 Pre-wash
ªAdds a pre-wash phase at the start of the cycle with water heating to 30°C (or cold, if selected).
ªIn COTTON and SYNTHETICS cycles, performs a short spin before passing to the washing phase.
ªThis option cannot be selected for WOOL and HAND-WASH cycles.
5.3.4 Soak
ªAdds a pre-wash phase (30’ duration with wool cycle movement) at the start of the cycle with water
heating at 30°C (or cold, if selected).
ªIn COTTON and SYNTHETICS cycles, performs a short spin (impulse) before passing to the washing
phase.
ªTogether with the delayed start option it is possible to select a soak time from 30 minutes up to 10 hours.
ªThis option cannot be selected for WOOL and HAND-WASH cycles.
5.3.5 Stains
ªAdds a 5-minute motor movement phase after heating to 40°C.
ªDucts water to the pre-wash/stains compartment in order to introduce the special stain-removal product.
ªThis option cannot be selected for DELICATES, WOOL and HAND-WASH cycles.
ªThe movements during the washing phase change from vigorous to normal.
5.3.6 Short (daily)
ªModifies the structure of the washes in the COTTON and SYNTHETICS programmes in order to obtain
good washing performance with a very short cycle (optimization for small loads).
5.3.7 Very short
ªModifies the structure of the COTTON, SYNTHETICS and DELICATES programmes in order to obtain
short washing times (optimization for small or lightly-soiled loads).
ªReduces the number of rinse cycles (one less).
ªIncreases the water level in the remaining two rinse cycles.
5.3.8 Economy / Energy label
ªModifies the structure of the COTTON 40°/50°/60°/90° - SYNTHETIC FABRICS 50°/60° programmes in
order to reduce energy consumption.
ªReduces the washing temperature in 90°/60°/50° programmes, while for the 40° programme the
temperature is increased by 4°.
ªIncreases the duration of the wash phase.

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5.3.9 Sensitive
ªAdds a rinse in the COTTON – SYNTHETIC FABRICS.
ªDuring the cotton cycles the movements pass from vigorous to normal.
ªEliminates the intermediate spins except from the last two which are reduced.
5.3.10 Extra rinse
Adds two rinses in the COTTON, SYNTHETICS and DELICATES cycles.
Eliminates the intermediate spin cycles, with the exception of the last rinse, which is reduced to 450 rpm.
If the appliance features this button press it and then the corresponding LED lights.
5.3.11 “Half load” button
ªEliminates a rinse in the COTTON programmes.
5.3.12 Easy-Iron
•In COTTON programmes:
ªAdds three rinses.
ªEliminates the intermediate spins.
ªPerforms an impulse spin phase.
ªAdds an “untangling” phase after the spin cycle.
•In SYNTHETICS cycles:
ªReduces the heating temperature in 50/60° cycles to 40°C.
ªIncreases the washing time.
ªProlongs the cooling phase at the end of the washing phase.
ªAdds one rinse without spin cycle.
ªAdds an “untangling” phase after the impulse spin cycle.
5.3.13 Reduced spin speed
ªReduces the speed of all spins as shown in the table.
Maximum spin speed (rpm) 600 700 800 900 1000 1100 1200 1300 1400 1500 1600
Reduction for COTTON (rpm) 450 450 450 450 500 550 600 650 700 750 800
Reduction for ALL OTHER CYCLES
(rpm) 450 450 450 450 450 450 450 450 450 450 450
5.3.14 No spin
ªEliminates all the spin phases.
ªIf selected, three rinses are added in the COTTON cycle and one in the SYNTHETICS cycle.
5.3.15 Modifying the spin speed
ªReduces the speed of all spin cycles.
ªThe last position can be used for NO SPIN, RINSE-HOLD.
ªIf the NO-SPIN option is selected, three rinses are added in the COTTON cycle, and one in the
SYNTHETICS cycle.
5.3.16 Time reduction (Quick)
ªModifies the structure of the COTTON - SYNTHETICS– DELICATES programmes to obtain washing
time very short (optimization for small or lightly-soiled loads).
ªReduces the no. of rinses (one rinse less).
ªIncreases the water level of the other two rinses.
ªCorresponds to the SHORT- VERY SHORT cycles on the basis of the configuration of the appliance.
5.3.17 Temperature adjustment
ªUsed to select the washing temperature compatibly with the limit temperature for the cycle.
ªCan be used during the cycle selection phase: the temperature can be modified only if the heating phase
has not started (in pause mode).

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5.3.18 “Exclusion of the buzzer”
In models with the buzzer it is possible to exclude the acoustic signal during the selection or at the end of the
cycle, but the alarm remains on. The key combination is described in the user manual attached with the
appliance.
5.3.19 Delayed-start time
•Models with digit
ªIt is possible to select, during the programme selection phase, a delayed start from 30 minutes up to 23
hours ()30’)60’)90’)2h)3h...)23h)0h).
ªDuring the delay phase, the time decreases every hour up to 2h, then by 30minutes.
ªTo start the cycle immediately, after the delay time began: press the Start/Pause button, cancel the
delay time by pressing the relative button and press Start/Pause again.
•Models with led
ªInsert a pause before the start of the programme, the delay time is indicated by the corresponding LEDs.
ªTo start the cycle immediately, after the delay time began: press the Start/Pause button, cancel the
delay time by pressing the relative button and press Start/Pause again.
5.4 Variation of the rinses according to the options
No of rinses with the options
Normal
Half load
Super rinse
Night cycle
Easy-ironing
Exclusion of spin
Super rinse and half
load
Super rinse and night
cycle
Night cycle and half load
Night cycle,
super rinse and half
load
Sensitive
Normal 3 2 5 6 6 6 4 8 5 7 4
Eco – Energy label 3 2 5 6 6 6 4 8 5 7 4
COTTON Very short 2 2 4 5 5 5 4 7 5 7 3
Normal 3 - 5 4 4 4 - 6 - - 4
Eco – Energy label 3 - 5 4 4 4 - 6 - - 4
SYNTHETIC
FABRICS Very short 2 - 4 3 3 3 - 6 - - 3
Normal 3 - 5 3 - 3 - 5 - - 4
Eco – Energy label - - - - - - - - - - -
PROGRAMMES
DELICATES Very short 2 - 4 2 - 2 - 4 - - 3

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5.5 Display (some models)
The display shows the following information:
Öthree flashing digits, when the appliance is switched on.
Öthe duration of the washing programme, which appears after selecting it. This time corresponds to
that necessary for the maximum load for every type of programme. After starting the programme, the
time diminishes (and updates) by every minute.
Öthe end of the programme indicated by a "0" (when it is possible to open the door).
Öthe delayed start, selected by the relative button. After pressing the START/PAUSE button, the
countdown starts and the delayed time diminishes by every hour. In the last 2 hours diminishes by
30min.
Öan alarm code, indicating anomalies in the functioning of the machine.
5.6 LEDs
The LEDs indicate different information according to the type of configuration; the End-of-cycle Led is
featured in all models.
Type of Led Functions
Pre-wash Lights during selection mode if the programme includes the pre-wash phase, and during
the execution of the pre-wash.
Wash Lights during selection mode if the programme includes the wash phase, and during the
execution of the wash.
Pre-wash/Wash Lights during selection mode if the programme includes the pre-wash or wash phases, and
during the execution of these phases.
Rinse Lights during selection mode if the programme includes rinse phases, and during the
execution of the rinse.
Spin Lights during selection mode if the programme includes the spin phase, and during the
execution of the spin.
Drain Lights during selection mode if the programme includes the drain phase, and during the
execution of the drain
Extra rinse Lights when this option has been memorized (if included in the cycle) during the execution
of the rinse.
Rinse hold Lights if the programme includes the rinse-hold option and at the end of the cycle, when
the appliance stops with water in the tub.
Current cycle Lights during execution of the cycle
End of cycle Lights when the programme has been completed; also used to display alarm conditions
Blocked filter Lights at the end of the cycle if the drain filter is blocked.
Overdosing Lights at the end of the cycle if an overdosing alarm of detergent occurs.
ON/OFF Lights when the appliance is switched on
Door
ªLights when the door is locked by the interlock.
ªSwitches off when the door is locked.
ªFlashes when the door is about to unlock (it is clear above all in models with safety
device with PTC)
Time-to-end Lights when the display shows the time-to-end

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6 TECHNICAL CHARACTERISTICS
6.1 EWM1000 Plus Electronic control
The EWM1000 Plus electronic control consists of a main PCB
(1) and a control/display board (2).
6.1.1 Functions of the circuit board
ÖThe circuit board receives signals relative to the cycle settings via the control/display board. The buttons,
the LEDs and the display are also mounted on this board which is connected to the programme selector.
ÖThe board also powers all the electrical components (solenoid valves, washing motor, drain pump,
heating element, door interlock).
ÖThe board controls the temperature of the washing water via an NTC sensor, as well as the speed of
rotation of the washing pump according to the signal received from the tachometric generator.
ÖIt checks the water level in tub via the level pressure switch and the safety one.
6.1.2 Memory in the control system
The main circuit board features an EEPROM memory (external to the microprocessor) which stores in
memory data relative to the configuration, description of the cycle, cycle status in case of a power failure,
and any alarm conditions.
The configuration data (entered in the factory using a computer with a DAAS interface) determine the
functionalities of the appliance (number and type of programmes, options, LEDs etc).
μP
ROM
RAM
EEPROM
(external
to the μP)
Asynchronous
external serial
port Synchronous
internal serial
port
Power Fail and
machine status
Configuration of
the appliance
Description of the
cycle
SENSORS
ELECTRICAL
LOADS
PROGRAMM
E
SELECTOR
Buzzer
MAIN CIRCUIT BOARD
μ
P
DISPLAY BOARD
μ
P
ButtonsLEDs Display

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The overall structure of the microprocessor memory on the main PCB is subdivided into three sections:
ROM This area of memory contains the software with the general instructions that control the operation
of the appliance, such as those of the electrical components and alarms. The ROM is set up by
the manufacturer of the microprocessor, and cannot be modified.
RAM This part of memory contains all the variables used during the execution of the wash programme,
which are written in dynamic format. The RAM can be read using a DAAS interface.
EEPROM This area of memory contains:
→the data necessary to restart the appliance in case of a power failure;
→the parameters for the wash cycle, such as water fill level, speed and type of motor movement,
and the temperature during the various phases of the wash cycle. Once written, this data is
protected and, normally, can be read only using a DAAS interface;
→data relative to the configuration of the appliance, such as the speed of the final spin phase,
the volume of the tub, the type of washing system, etc. This data may be entered either via a
DAAS interface or via the control/display board.

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6.2 Power supply and programme selection
The main board (3) is powered by the
interference suppressor (1) and by the
closure of the contacts of the main switch
(2). The affected connectors are J6-2
(neutral) and J10-1 (line).
The control/display board (4) is powered at
5V by the main board: through the
programme selector (5) it is possible to
select the programme. The selection of the
options / start is performed through the
board buttons (4).
The buzzer (if featured) (6) is powered by
the display board.
6.3 Door interlock
There are two types of door interlock:
•voltmetric with PTC: it is always necessary to wait from 1 to 3 minutes before opening the door.
•instantaneous: the door can be opened as soon as the cycle ends.
6.3.1 Voltmetric interlock with PTC
1. Suppressor
2. Main switch (button or
programme selector)
3. Door interlock
4. Main PCB
5. Door pilot lamp closed
•Operating principle
ªWhen the washing programme is started by pressing the START/PAUSE button, the bi-metal PTC
(contacts 3-5) is powered by the triac on the PCB (J6-2 connector): after 2 – 4 seconds, this closes the
switch (5-4) which powers the electrical components of the appliance (only if the door is closed).
ªThe door interlock prevents aperture of the door while the appliance is in operation.
ªAt the end of the washing programme, the PCB disconnects the interlock from the power supply, but the
door remains locked for 1 to 2 minutes (PTC cooling time).
Door locked” pilot lamp
ªCertain models feature a pilot lamp which lights to indicate that the door is locked. This pilot lamp
switches off when the door can be opened.

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6.3.2 Instantaneous door interlock
1. Suppressor
2. Main switch (button or
programme selector)
3. Door interlock
4. Main PCB
5. Door pilot lamp off
•Operating principle
ªWhen the appliance is switched on, the ON/OFF switch closes and the bi-metal PTC (contact 4-2) is
powered; the door, however, is not locked.
ªWhen the programme starts (START/PAUSE button), the PCB transmits a 20 msec voltage signal to
contacts 4-3 of the solenoid valve (J10-2 connector of the board) (at least 6 seconds must elapse after
switching on); this signal locks the door and, at the same time, closes the main switch (contacts 4-5)
which powers all the components in the appliance.
•At the end of the programme, the PCB transmits two 20 msec signals (at an interval of 200 msec).
-the first signal does not release the door.
-the second signal (which is transmitted only if the system functions correctly) releases the door
interlock and at the same time the contacts of the main switch are opened.
•Conditions necessary for door release
ªBefore transmitting the door release signals, the main PCB checks for the following conditions:
-the drum must be stationary (no signal from the tachometric generator)
-the water level must not be higher than the lower edge of the door
-the temperature of the water must not exceed 40°C.
•Automatic release device
ªIn the event of a power failure, if the appliance is switched off, or if the solenoid should malfunction, the
bi-metal PTC cools over a period of 1 to 4 minutes, and then releases the door.
•“Door locked” pilot lamp
ªCertain models feature a pilot lamp which lights to indicate that the door is locked. This pilot lamp
switches off when the door can be opened.

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6.4 Control pressure switch for water level in the tub
Control of the water level is performed by a two or three-level pressure switch which functions as follows:
•contact 11-14: anti-boiling safety level
•contact 21-24: first level
•contact 31-32: anti-overflow safety level (not all models)
6.4.1 Pressure switch settings
Full (mm) Refill (mm) Full (mm) Refill (mm)
Anti-boiling level 60±3 35±3 55±3 35±3
1st level 95±3 65±3 80±3 55±3
Anti- overflow level 390±15 240±50 390±15 240±50

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6.5 Water fill system
The solenoid valves are powered by the
PCB via two or three triacs. The status of
the pressure switch (empty/full) is
detected by two “sensing” lines”.
1. PCB
2. Anti-boiling level
3. 1st level
4. Pre-wash solenoid
5. Wash solenoid
6. Bleach solenoid (some models)
7. Heating element
AB_S Anti-boiling level sensor
L1_S 1st level sensor
6.5.1 Calculation of flow rate
Calculation of the capacity – necessary to determine the time for the supplementary fill – is performed by
measuring the time that elapses between the closure of the anti-boiling contact on FULL and the closure of
the 1st level contact.
Volume
Flow rate = Time (T1-T2)
Volume = Volume of the tub between the two levels (anti-boiling and
1st level)
T1 –T2 = The time that elapses between the closure of the anti-boiling
and 1st level contacts on FULL
•Water fill diagram
ELT = solenoid valve
P1 = 1st level
AB = anti-boiling level
rpm = drum rotation speed
Water in = water fill
Phase A: The phase during which the initial fill takes place:
1. Water fill until the anti-boiling pressure switch closes on FULL.
2. Water fill until the 1st level pressure switch closes on FULL: the delivery of the solenoid is
calculated during this phase.
3. Water fill for time Q, which varies according to delivery and cycle phase.
Phase B: If the 1st level pressure switch returns to EMPTY, a supplementary fill is performed until the
pressure switch returns to close on FULL. This phase may be followed by a further timer-
controlled fill.