SERVICE MANUAL WASHING - 4mcculloch.co.uk · Spares Operation 04.2002 C.D. 599 513 093 EN- 3 -...

- 1 -Spares Operation 04.2002 C.D. 599 513 093 EN

SERVICE MANUAL

© ElectroluxMuggenhofer Straße 135D-90429 NürnbergGermany

Fax +49 (0)911 323 1022

Spares Operation

Publ.-Nr.:599 513 093685

04.2002

WASHING

EN

Edition:

Washingmachine,Frontlader

EWM 1000


Contents

1. Operating elements/panel .................................................................................41.1 One button input philosophy .............................................................................42. Options ..............................................................................................................52.1 Description of options........................................................................................63. Washing programmes .......................................................................................83.1 Normal (consumer) cotton / linen-cycles ...........................................................83.2 Cotton / Linen cycles .........................................................................................93.3 Normal (consumer) cycles ..............................................................................103.4 Delicates-cycles ..............................................................................................113.5 Wool-cycles .....................................................................................................123.6 Hand-wash cycles ...........................................................................................124. Control of water level in tub.............................................................................134.1 Profile of cotton 60° eco / energy label cycle ..................................................144.2 Profiles of cotton 60°C cycles .........................................................................145. Drum movements ............................................................................................156. Spinning profiles..............................................................................................167. Components ....................................................................................................187.1 The door interlock ...........................................................................................187.2 The pressure switch ........................................................................................187.3 Water fill system..............................................................................................197.4 Anti-flooding-device.........................................................................................197.5 The heating element .......................................................................................207.6 The NTC-sensor..............................................................................................207.7 The drain pump ...............................................................................................217.8 The motor ........................................................................................................217.9 Anti-foam control system ................................................................................228. Fast unbalance control system (FUCS) ..........................................................238.1 Examples of operation of the unbalancing control function ............................239. Service test programme ..................................................................................2510 Alarms .............................................................................................................2610.1 User alarm display ..........................................................................................2610.1.1 Alarms displayed during normal operation ......................................................2610.2 Reading the alarm codes ................................................................................2710.2.1 Displaying the alarm........................................................................................2710.2.2 Operation of alarms during diagnostics ..........................................................2710.3 Rapid reading of alarm codes .........................................................................2810.4 Cancelling the last alarm .................................................................................2810.5 Table of alarm codes ......................................................................................2911. Demo-mode ....................................................................................................3011.1 Access to demo-mode: ..................................................................................3011.2 Exiting demo-mode: ........................................................................................3012. Rinse+ cycle ....................................................................................................3112.1 Activate rinse+ cycle .......................................................................................3112.2 Deactivate rinse+ cycle ...................................................................................3113. Wiring ..............................................................................................................3214. Circuit diagram ................................................................................................3315. Legend ............................................................................................................3416. Access to the electronic control system ..........................................................3516.1 Removal of the control panel ........................................................................3516.2 Removal of the electronic control board .........................................................36


General characteristics:

- Electronic control system EWM100- Demo-mode- 16-position programme selector with main-switch (incorporated on the PCB)- 5 pushbuttons, 15 LEDs- Integrated buzzer (high-version)- 2 solenoid valves- 3-level pessure switch- Traditional washing-system with eco-ball- Anti-foam control- Anti-unbalancing system (FUCS)- Spin speed up to 1400 rpm- Heating element up to 1950W (integrated in the tub)- Temperature control with NTC- Power supply 220/240V, 50/60Hz (configurable)


1. Operating elements/panel1.1 One button input philosophy

- 16-position programme selector- 5 pushbuttons- 14 (15) LEDs

The various positions of the selector may be configured to perform different washing programmes.In the position 0 (off), the appliance is switched off and the current programme is cancelled. Foreach programme, the compatible options and other parameters are defined.

The washing programmes, the functions of the selector knob and the various pushbuttons varyaccording to the model, since these are determined by the configuration of the appliance.

Configuration-example:


2. Options

The table below lists the possible options for the washing programmes, the compatibility of the variousoptions and with the cycle, and when it is possible to select or modify the options.

The options can be selected in different ways:

- using the programme selector: in this case, the options are configured as specialprogrammes.

- using the pushbuttons

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2.1 Description of options

- Night-cycle

- Eliminates all spin phases and adds three rinses in COTTON cycles and two rinses inSYNTHETICS cycles.

- Stops the appliance with water in the tub before the final rinse.- Switches off the buzzer (if configured).

- Pre-wash

- Adds a pre-wash phase at the start of the cycle with water heating to 30°C (or cold, ifselected).

- In COTTON and SYNTHETICS cycles, performs a short spin before passing to the washingphase.

- This option cannot be selected for WOOL and HAND-WASH cycles.

- Stains

- Adds a 5-minute motor movement phase after heating to 40°C.- Ducts water to the pre-wash/stains compartment in order to introduce the special stain-rem

oval product.- This option cannot be selected for DELICATES, WOOL and HAND-WASH cycles.

- Short (Daily)

- Modifies the structure of the washes in the COTTON and SYNTHETICS programmes inorder to obtain good washing performance with a very short cycle (optimization for smallloads).

- Very short

- Modifies the structure of the COTTON, SYNTHETICS and DELICATES programmes in orderto obtain short washing times (optimization for small or lightly-soiled loads).

- Reduces the number of rinse cycles (one less).- Increases the water level in the remaining two rinse cycles.

- Economy / Energy label

- Modifies the structure of the COTTON 40-60 and SYNTHETICS 50/60 programmes in orderto reduce energy consumption.

- Reduces the washing temperature.- Increases the duration of the wash phase.

- Super-rinse- Adds two rinses in the COTTON, SYNTHETICS and DELICATES cycles.- Eliminates the intermediate spin cycles, with the exception of the final rinse, which is reduced

to 450 rpm.

- Bleach

- Ducts water through the bleach compartment at the beginning of the first rinse in COTTONcycles.

- Half-load

- Eliminates one rinse in COTTON programmes.


- Easy-Iron

- In COTTON-programmes:

- adds three rinse cycles- eliminates the intermediate spin cycles- performs an impulse spin phase- adds an �untangling� phase after the spin cycle

- In SYNTHETICS-cycles:

- reduces the heating temperature in 50/60° cycles to 40°C- increases the washing time- prolongs the cooling phase at the end of the washing phase- addds one rinse- adds an �untangling� phase after the impulse spin cycle

- Rinse-hold

- Stops the appliance with water in the tub before the final spin cycle.- To drain the water, reset the programme and then select a drain or spin cycle.

- Reduced spin speed

- Reduces the speed of all spins as shown in the table:

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- Delayed-start time

- Adds a pause before the start of the programme. The delay time is displayed on thecorresponding LEDs.

- To start the cycle immediately after selecting a delayed start:- press START/PAUSE, cancel the delay time by pressing the appropriate button, then press

START/PAUSE again.


3. Washing programmes3.1 Normal (consumer) cotton / linen-cycles: cold - 30°C - 40°C - 50°C - 60°C - 90°C

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4. Control of water level in tub

The water fill is carried out in two phases:- level fill: is controlled by closure of fN pressure switch in full position- time fill: the duration is calculated by the electronic to fill the set quantity.

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4.1 Profile of cotton 60° eco / energy label cycle

4.2 Profiles of cotton 60°C cycles


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7. Components7.1 The door interlock

When the washing programme is started by pressing the START/ PAUSEbutton, the bi-metal PTC (contacts 3-5) is powered by the triac onthe PCB: after 2-4 seconds, this closes the switch (5-4) which powers theelectrical components of the appliance (only if the door is closed).The door interlock prevents aperture of the door while the appliance is inoperation.At the end of the washing programme, the PCB disconnects the interlockfrom the power supply, but the door remains locked for 1 to 2 minutes (PTCcooling time).

7.2 The pressure switch

Control of the water level is performed by a three-level pressure switch which functions as follows:

- contact 11-14: anti-boiling safety level- contact 21-24: first level- contact 31-32: anti-flooding safety level

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7.3 Water fill system

The solenoid valves are powered by the PCB via two triacs. The status of the pressure switch (empty/full) is detected by two �sensing� lines.

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 thepressure switch returns to close on FULL. This phase may be followed by a further timer-controlledfill.

7.4 Anti-flooding-device

The third pressure switch level is used as an anti-flooding safety device: if the pressure switchcontact should close in the FULL position, the PCB actions the drain pump until the pressure switchreturns to the EMPTY position.

AB-sensing

Level 1-sensing


7.6 The NTC-sensor

The temperature is controlled by the PCB by means of a NTC temperature sensor.

To check the NTC sensor function you can measure the ohmic resistance between the contacts J5/1 and J5/2.

NTC resistance f30:

°C W20 605060 125080 640

7.5 The heating element

The heating element is powered by a relay on the PCB viathe contacts of the pressure switch when closed on FULL.

Connection: 230V; 50Hz;Power: 1950WFuse: 10A


7.8 The motor

The PCB powers the motor via a triac. The direction of rotation is reversed by switching of the contactson the two relays (K2-K3), which modify the connection between the rotor and the stator.In certain models, a third relay (K4) is used to power the stator (full or half range) according to the spinspeed.The speed of rotation of the motor is determined by the signal received from the tachymetricgenerator (g1).During the spin phases, the microprocessor, depending on the software configuration, may perform theanti-foam control procedure and the anti-unbalancing control procedure.

7.7 The drain pump

The PCB powers the drain pump via a triac as follows:

- for a pre-determined period- until the anti-boiling pressure switch closes on EMPTY, after which the pump is actioned for a brief

period or passes to the subsequent phase.

Connection:

124 306 103 FHP 230V; 50Hz AC 135W +/-8% 1,95W +/-8% 1,70W +/-8%124 309 903 FHP 230V; 50Hz AC 135W +/-8% 1,75W +/-8% 1,12W +/-8%132 079 901 FHP 230V; 50Hz AC 135W +/-8% 1,71W +/-8% 0,49W +/-8% 1,26W +/-8%

Article number Connection Tacho Rotor Stator Stator complete(3-4) (8-9) (5-1) (5-10)


7.9 Anti-foam control system

The anti-foam control procedure is performed via the anti-boiling pressure switch (AB).

Spin phase without foam Spin phase with little foam

- Spin with little foam: if the contact of pressure switch AB closes on FULL, the spin phase isinterrupted; the drain pump continues to operate and, when the contact returns to EMPTY, the spinphase is resumed.

- Spin with excessive foam in the tub (critical situation): The control system detects whether thepressure switch commutates 5 times to FULL. in this case, the spin phase is skipped, and a one-minute drain cycle is performed with the motor switched off; in the case of a washing phase, asupplementary rinse is added.

�FUCSFUCS

spinspin Anti-foam(Level AB)

300 rpmpulses

300 rpmpulses


8. Fast Unbalance Control System (FUCS)

The control procedure for unbalanced loads is performed dynamically, before each spin cycle, asfollows:

- An initial phase is performed in which the direction of rotation of the drum is alternated at 55 rpm.- The phase begins at a speed of 55 rpm; the speed can never fall below this threshold, otherwise

the check is repeated.- At intervals of 300 ms, the balance is calculated and compared with predetermined limits. If the

value is less than the lower limit, the speed of the drum is increased by 2 rpm; if the value ishigher, the speed of the drum is reduced by 2 rpm. The reduction in the speed of the drumdistributes the washing correctly; this procedure is repeated until the wash load is completelybalanced.

- Correct balancing of the wash load is achieved at a speed of 115 rpm, after which the spin cyclebegins.

The unbalancing control function takes place in four phases; each phase is characterized byan unbalancing threshold and a time-out (maximum time).

Phase 0: Phase 0 has a pre-determined unbalancing threshold; if correct balancing of the washload is achieved, the appliance performs a 470 rpm spin pulse, preceded by 5seconds at 100 rpm and followed by phase 1; otherwise, after a maximum of 60seconds, the cycle passes directly to phase 1.

Phase 1: The first phase has a different preset unbalancing threshold: if correct balancing isachieved, the appliance performs the spin cycle, preceded by 5 seconds at 100 rpm. Ifnot, after a maximum of 120 seconds, the cycle passes to phase 2.

Phase 2: The pre-determined unbalancing threshold in the second phase is different: if correctbalancing is not achieved within 60 seconds, the function passes to phase 3.

Phase 3: The third phase has a pre-determined unbalancing threshold: if correct balancing isachieved within 90 seconds, a spin pulse is performed, preceded by 5 seconds at 100rpm and followed by a repeat of phase 1. If the load is highly unbalanced after the secondattempt for phase 3, the spin cycle is skipped; if balancing is not perfect, a reduced-speedspin is performed.

8.1. Examples of operation of the unbalancing control function

The examples shown below describe the operation of an appliance with a final spin speed of 1000 rpm.

Perfect balancing

- Low speed- FUCS phase 0

with spin pulse- Low speed- FUCS phase 1- Normal spin


Balancing after two attempts

- Low speed- FUCS phase 0- FUCS phase 1- FUCS phase 2

Balancing after the third phase (normal spin-speed)

- FUCS phase 0with spin pulse

- FUCS phase 1- FUCS phase 2- FUCS phase 3

with spin pulse- FUCS phase 1- FUCS phase 2- FUCS phase 3- Normal spin

Balancing after the third phase (reduced spin-speed)

- FUCS phase 0- FUCS phase 1- FUCS phase 2- FUCS phase 3

with spin pulse- FUCS phase 1- FUCS phase 2- FUCS phase 3- reduced-speed spin

Unalancing after the third phase

- FUCS phase 0- FUCS phase 1- FUCS phase 2- FUCS phase 3- FUCS phase 1- FUCS phase 2- FUCS phase 3- no spin


9. Service test programme

9.1 Access to service test programme:

- Switch off the appliance (programme selector position 0).

- Press and hold down button 2 and 3 simultaneously.

- Holding down both buttons, switch the appliance on by turning the programme selectorone position to the right (clockwise).

- Continue to hold down both buttons at least 2 sec. until the LEDs begin to flash.

Irrespective of the type of PCB and the configuration of the programme selector it is possible, afterentering service test mode, to perform diagnostics on the operation of the various components and toread the alarms by turning the programme selector clockwise.All the alarms are enabled during the diagnostics cycle.

9.2 Exiting service test program:

- To exit the service test program, switch off the appliance, then on, then off again.

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10 ALARMS10.1 User alarm display

Control of the alarm system can be configured; according to the model, therefore, some or all of thealarms may be displayed to the user.Normally, all alarms are displayed for the user, with the exception of:

¨ E61 (insufficient heating during the washing phase)

¨ E83 (error in selector reading)

The alarms are enabled during the execution of the washing programme, with the exception of alarmsassociated with configuration and the power supply (voltage/frequency), which are also displayed duringthe programme selection phase.The door can normally be opened (except where specified) when an alarm condition has occurred oncondition that:

- the level of the water in the tub is below 1st level

- the temperature of the water is lower than 40°C.

Certain alarm conditions require that a drain phase be performed before the door can be opened:

- Cooling water fill if the temperature is in excess of 60°C.

- Drain until closure of both pressure switch contacts (1st level and anti-boiling safety system) onEMPTY within a maximum of 5 minutes.

10.1.1 Alarms displayed during normal operation

The type of alarm condition is displayed to the user by the repeated flashing of the END OF CYCLE LED(0.4 seconds lit, 0.4 seconds off, with an interval of 2.5 seconds between sequences). This LED isfeatured on ALL MODELS, though configured in different positions.All the LEDs flash to indicate a configuration error.

If, for example, the user should forget to close the door, the control system will detect alarm E41 about15 seconds after the start of the cycle; the cycle remains in PAUSE mode and the LED flashesrepeatedly in the sequence shown in the table.

The four flashes indicate the first of the two digits of alarm E41 (the alarms for a given function aregrouped in �families�).

In this case, after closing the door, it is sufficient to press START in order to re-start theprogramme.


10.2 Reading the alarm codes

In order to read the last alarm code memorized in the EEPROM on the PCB:

- Enter service test programme (page 25)

- Irrespective of the type of PCB and configuration, turn the programme selector clockwise to thetenth position.

10.2.1 Displaying the alarm

The alarm is displayed by a repeated flashing sequence of the two LEDs (0.4 seconds lit, 0.4 secondsoff, with an interval of 2.5 seconds between sequences). The buzzer (if featured) will sound �bips� insynchronization with the flashing of the END OF CYCLE-LED:

- END OF CYCLE LED indicates the first digit of the alarm code (family).

- START/PAUSE indicates the second digit of the alarm code (number within the family).

These two LEDs are featured on all models (though they are configured differently), and flashsimultaneously.

Example:

Notes:

- The first letter of the alarm code �E� (Error) is not displayed, since this letter is common to all alarmcodes.

- The alarm code �families� are shown in hexadecimal; in other words:A is represented by 10 flashesB is represented by 11 flashes...F is represented by 15 flashes

- Configuration errors are shown by the flashing of all the LEDs (user interface not configured).

10.2.2 Operation of alarms during diagnostics

All alarms are enabled during the components diagnostics phase.


The last alarm code can be displayed even if the programme selector is not in the 10th position(service test mode) or if the appliance is in normal operating mode (e.g. during the execution of anwashing programme):

- Press and hold down buttons 2 and 3 simultaneously for at least 5 seconds: the LEDs initiallyswitch off, and then display the flashing sequence corresponding to the alarm.

- The alarm sequence continues as long as the two buttons are held down.

- The alarm reading system is as described in paragraph 10.2

- While the alarms are displayed, the appliance continues to perform the cycle or, if in theprogramme selection phase, maintains the previously-selected options in memory.

10.4 Cancelling the last alarm

- Enter service test program (page 25)

- Press and hold down button 2 and 3 simultaneously for at least 5 sec.

It is good practice to cancel the last alarm:

- after reading the alarm code, to check whether the alarm re-occurs during diagnostics

- after repairing the appliance, to check whether it re-occurs during testing.

10.3 Rapid reading of alarm codes


10.5 Table of alarm codes

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Alarm


11.1 Access to demo-mode:

- Switch off the appliance (programme selector position 0).

- Press and hold down button 2 and 3 simultaneously.

- Holding down both buttons, switch the appliance on by turning the programme selectortwo positions to the right (clockwise).

- Continue to hold down both buttons at least 5 sec.

11.2 Exiting demo-mode:

- To exit Demo-mode, switch off the appliance.

11. Demo-mode


12. Rinse+ cycle

12.1 Activate rinse+ cycle

- Set programme selector to positon cotton/linen, easycare or delicate (with anytemerature).

- Press and hold down button 1 and 3 simultaneously at least 5 sec. until LED63 (rinse+)begins to light.

12.2 Deactivate rinse+ cycle

- Set programme selector to positon cotton/linen, easycare or delicate (with anytemerature).

- Press and hold down button 1 and 3 simultaneously at least 5 sec. until LED63 (rinse+)extinguishes.


13. Wiring


14. Circuit diagram


15. Legend

A (ASM) Connection housingE (f30) NTC-sensorHE Main earthK (k5) SuppressorM (m1/g1) MotorN (fTr, fN, fH) Pressure switchP (m3) PumpR (r1) HeatingV (s1, s2) ValveZ (e4) Door lock


16. Access to the electronic control system

1. Electronic control system2. Control panel3. Solenoid valves4. Detergent dispenser5. Pressure switch6. Tub

a) The worktop is tightened to the rear side of the appliance by2 screws.Untighten both screws and pull the worktop away to theback.

b) Remove the detergent drawer.

c) Remove the 2 screws behind the drawer

d) Remove the 2 screws in the upper area.Pull the control panel away to the front.

b

c

d

16.1 Removal of the control panel


a) Detach the cover for the connectors from the control-board casing.

Detach the wiring from the PCB.

b) Ensure that the position of the selector is as shown in thefigure (position off).

Remove the knob flange and the spindle from theselector.

c) Remove 4 screws which secure the pushbutton supportpanel to the board and remove the support/pushbuttonassembly.

Remove the other screw which secures the board to thecontrol panel support.

d) Release the 2 anchor tabs and remove the electronicboard assembly.

16.2 Removal of the electronic control board

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