SERVICE MANUAL WASHING WASHING-MACHINES & WASHER-DRYERS ELECTROLUX HOME PRODUCTS ITALY S.p.A. Spares Operations Italy Corso Lino Zanussi, 30 I - 33080 PORCIA /PN Fax +39 0434 394096 Edition: 2005-01-12 dmm Publication no.
SOI/DT 2005-01 dmm 2/67 599 36 82 59
INDICE 1 2 3 Purpose of this manual .............................................................................................................................. 6 PRECAUTIONS ......................................................................................................................................... 6 GENERAL SPECIFICATIONS................................................................................................................... 7 3.1 General specifications WM ........................
8.3.4 PWL_1 (wool) Delicate movement ............................................................................................ 28 8.3.5 PWL_4 (hand wash) Delicate movement .................................................................................. 28 8.3.6 Cotton/Linen, Synthetics – Intermediate Synthetics Prewash Spin .......................................... 29 8.3.7 Cotton/Linen, Intermediate Cotton/Linen Wash Spin ................................................................ 29 8.3.
15.1 Flow meter..................................................................................................................................... 62 15.2 Aqua Control ................................................................................................................................. 62 15.3 Turbidity sensor............................................................................................................................. 63 15.3.1 Installing the turbidity sensor ....................
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 2000EVO electronic control system and produced in Porcia (Italy). The electronic control system EWM 2000EVO consists of a main electronic board and one control/display board, “Full SMD” version.
3 GENERAL SPECIFICATIONS 3.1 General specifications WM Programme selector Serial port Power supply Type of washing Rinsing system Motor Spin speed Anti-unbalancing system Water fill Detergent drawer Control of water level in the tub Door safety device Power of heating element Temperature control Audible signalling system Sensors 3.
4 CONTROL PANEL The configuration of the control panel depends on the following: ª Type of control/display board (with or without display) ª Design of the control panel and position of the programme selector (right or left of the buttons) ª Number and configuration of the buttons (max. 8) ª ON/OFF switch: incorporated in the programme selector or with separated button.
4.1 4.1.1 Control/display board Version with display Ö 3 digits Ö 28 LEDs Ö 8 buttons 4.1.
5 WASHING PROGRAMMES 5.1 Configuration of programmes The table below lists the parameters that can be used to define the washing programmes. Type of fabric Special programmes Temperature Spin Options (Normal / Possible) Programme phases 5.
6 WASHING PROGRAMMES AND OPTIONS 6.1 Possible programmes The wash programmes can be configured to suit personal needs. The table below lists the standard programmes. Programme 90 90E 60 60E Cotton 50 50/40E 40 30 Cold (¹) 60 60/50E 50 Synthetics 40 30 Cold (¹) 40 Delicate fabrics 30 Cold 40 Wool 30 Cold 40 Hand wash 30 Cold Temperature (°C) 85 67 60 50 (*)(**) 50 44 (*) 42 30 20 60 42 (*) 50 40 30 20 40 30 20 40 35 20 40 35 20 No.
6.2 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.
6.3 Description of options 6.3.1 Night cycle ª All the spin phases are eliminated. Three rinses are added to COTTON cycles and one rinse is added to SYNTHETICS cycles. ª The appliance is shut down with water in the drum before the final spin. ª No buzzer (if appliance is configured with a buzzer). ª To drain the water, select a drain or spin cycle. 6.3.2 Rinse Hold ª The appliance is shut down with water in the drum before the final spin. ª To drain the water, select a drain or spin cycle. 6.3.
6.3.9 Economy / Energy label ª The COTTON 40°/50°/60°/90° - SYNTHETICS 50°/60° programmes are modified to reduce energy consumption ª The wash temperature in the 90°/60°/50° programmes is reduced; the temperature in the 40° programme is increased by 4°. ª The duration of the wash phase is increased 6.3.
6.3.17 Modifying the spin speed ª Reduces the speed of all spin cycles. ª The last position can be used for NO SPIN, RINSE-HOLD. ª If the NO-SPIN option is selected, three rinses are added in the COTTON cycle, and one in the SYNTHETICS cycle. 6.3.18 Time reduction (Quick) ª Modifies the structure of the COTTON - SYNTHETICS– DELICATES programmes to obtain washing time very short (optimization for small or lightly-soiled loads). ª Reduces the no. of rinses (one rinse less).
6.3.24 Variation of rinses when options are selected Night cycle Easy-iron No spin Super rinse WOOL HAND WASH Night cycle Easy-iron No spin DELICATE Super rinse SYNTHETICS Sensitive PROGRAMMES COTTON Very short Short Eco Eco Normal Very short Short Eco Normal Very short Normal Normal Normal Normal Normal Number of rinses for the options 2 3 3 2 3 2 3 3 3 2 3 3 3 2 3 4 4 3 4 3 4 4 4 3 4 5 5 4 5 3 4 4 4 3 4 3 5 6 6 5 6 3 4 4 4 3 6 7 7 6 7 5 5 5 5 5 N.B.
6.5 LEDs These LEDs display different information depending on machine configuration; the end-of-cycle LED is present on all models. Type of LED Prewash Wash Prewash/ Wash Rinse Spin Drain Extra rinse Rinse Hold Cycle in progress Function This LED lights up if the selected programme includes a prewash, and lights up during the prewash phase when the programme is executed.
7 WASHING PROGRAMMES 7.1 Base programmes for Cotton / Linen: cold-30-40-60-90° (without options) N.° Phase Description Drain pump Recirc. pump Deterg Dispens.
7.2 Rinses of Cotton programmes N.° PHASE 44 45 46 47 48 48 50 51 52 53 2nd Rinse 37 38 39 40 41 42 43 Last rinse (softener) 36 1st Rinse 35 Description Drain pump Recirc. Pump Deterg.
7.3 Cotton / Linen programmes: 90 Eco, 40-60 “energy label” (without options) N.° PHASE Description Drain pump Recirc. Deterg. Motor movement Pump Disp Rpm Movem.
For programmes with two rinses 35 36 37 38 39 40 41 42 43 44 45 PHASE st N.° 1 Rinse 7.4.1 Rinses of Cotton / Linen programmes: 90 Eco, 40-60 “energy label” (without options) Last rinse (softener) 7.4 Drain pump Recirc. Pump Deterg.
7.5 Synthetics programmes: cold – 30 – 40 – 50 – 60° (without options) N.° PHASE Description Drain pump Recirc. Pump ON OFF Deterg.
Rinses of synthetics programmes N.° Description Recirc. Pump Deterg. Disp Motor Movement Rpm Movem. Pause No movem No movem CYCLE 90 60 40 30 * SYN_FIRST_R_LEV 6 sec. 3 min. SYN_REF_R_LEV Empty Elect.+ 14 sec.
Programmes for delicate fabrics: cold – 30° - 40° (without options) N.° PHASE Description Drain pump Recirc. Pump Deterg.
Wool programmes: cold – 30° - 40° N.
Hand wash programmes: cold – 30° - 40° N.° PHASE WASH 1 2 3 4 5 Description Drain pump Recirc. Pump Deterg. Disp Motor movement Rpm Calibration Water fill Maintenance & Refill Water fill Level Level Time Level ON OFF OFF OFF OFF OFF OFF OFF W W W 35 Maintenance & Refill Time OFF ON (35/15) W 35 Movem.
8 DRYING PROGRAMMES 8.1 Drying programme for cotton DRYING COTTON (full power) N.° PHASE Function Drain pump Fan LEV Compart. (10.0) COND Drain Water fill control Level Level ON OFF OFF OFF 3 Unrolling Time ON OFF Cooling Temperature ON ON Calculation of drying time Time ON ON 6 Timer-controlled drying Time OFF ON 7 Timer-controlled drying Time ON ON 8 Cooling Time ON ON 4 5 8.2 DRYING 1 2 Motor Rpm 55 Movem.
8.3 8.3.1 Drum movements at low speed and during spin D55 Delicate movement D55 8.3.2 8.3.3 sec rpm 12 4 12 0 55 0 4 -55 N55 Normal movement N 55 sec rpm 8 8 8 0 55 0 8 -55 E55 Vigorous movement E 55 8.3.4 8.3.
8.3.6 Cotton/Linen, Synthetics – Intermediate Synthetics Prewash Spin IMP C0 rpm FUCS 300 FUCS 450 FUCS 450 650 8.3.7 Cotton/Linen, Intermediate Cotton/Linen Wash Spin IMP_6 rpm FUCS IMP 450 FUCS 450 650 850 1200 8.3.8 sec x 1 x 30 20 10 60 Cotton/Linen Final Spin IMPCF_AC rpm FUCS IMP 450 FUCS 450 650 850 1000 1150 1400 1600 8.3.9 sec.
8.3.10 Delicates Final Spin DF rpm FUCS IMP 450 FUCS 450 700 1000 sec x 1 x 35 5 20 8.3.11 Hand Wash and Wool Final Spin WF rpm FUCS IMP 450 FUCS 450 650 850 1000 sec x 1 x 5 1 1 20 8.3.12 Easy iron Impulse Cycle EI EASY_IRON_IMP rpm FUCS 450 FUCS 650 FUCS 800 FUCS 900 8.3.13 Intermediate Spin for Cotton/Linen Super-rinse option CSR rpm FUCS IMP 450 FUCS 450 8.3.14 sec x 1 x 1 x 1 x 1 sec x 1 x 90 Movement during drying phase DRY_MOV rpm sec.
8.4 Control of water level in tub The water fill is carried out in three ways: ª level fill: is controlled by the electronic pressure switch level ª time fill: the duration is calculated by the electronic to fill the set quantity ª level fill and time fill combined The different levels are determined by the model configuration and depend on the type of tub used.
9 TECHNICAL CHARACTERISTICS 9.1 EWM2000EVO Electronic control The EWM2000 EVO electronic control consists of a main PCB (1) and a control/display board (2). 9.1.1 Functions of the circuit board PROGRAMM E SELECTOR DISPLAY BOARD LEDs µP Buttons Display ELECTRICAL LOADS µP SENSORS Buzzer MAIN CIRCUIT BOARD Ö The circuit board receives signals relative to the cycle settings via the control/display board.
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.
9.2 Analogic pressure switch (electronic) The electronic pressure switch is an analogic device that controls the water level in the tub. It is directly connected to the main electronic PCB. 1. air inlet hose 2. diaphragm 3. coil 4. electronic circuit (oscillator) 5. core 6. spring 7. calibration screw 8. connector The pressure switch is connected by a hose to the pressure chamber. When the tub is filled with water, the pressure created inside the hydraulic circuit expands the diaphragm.
9.3 Pressure switch 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: anti-boiling safety level contact 31-32: anti-overflow safety level (not all models) 9.3.
9.4 Anti-flooding device 1. PCB 8. Drain pump 9. Anti-overflow pressure switch HV1_S Anti-overflow level sensor The third pressure switch level (if featured) is used as an anti-overflow safety device: if the pressure switch contact should open in the FULL position, the PCB actions the drain pump until the pressure switch returns to the EMPTY position. 9.
9.6 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. 9.6.1 Voltmetric interlock with PTC 1. Suppressor 2. Main switch (button or programme selector) 3. Door interlock 4. Main PCB 5.
9.6.2 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 ª When 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.
9.7 Detergent dispenser The EWM 2000 EVO can control different types of dispensers: Detergent dispenser Type 3 compartments No. of solenoid valves Pre-wash/Stains – Wash – Conditioner (pre-wash and stain are in alternance) 2 Pre-wash/Stains – Wash – Bleach - Conditioner (the pre-wash/stain and conditioner compartment are linked together with a “intersection”) 2 Pre-wash/Stains – Wash – Bleach - Conditioner (pre-wash and stain are in alternance) 3 4 compartments 9.
9.9 Flow meter Some models of solenoid valves have a built-in flow sensor which measures the quantity of water in litres that is loaded into the appliance. If the sensor malfunctions, the water level is controlled by the analogue pressure switch. Solenoid valve – exploded view 1-Circuit board 2-Turbine 3-Deflector 9.9.1 Main board 4-Diffuser 5-Double filter 6- Reed switch Turbine 7-Magnet Operating principle of flow meter The main components of the flow sensor are: 1. 2. 3. 4.
Mechanical jamming of solenoid valve The solenoid valve may jam open without being actuated (which will cause flooding if the pressure switch controlling the water level does not trip). If this occurs, the electronic control system (which continuously monitors the flow sensor) will lock the door, start the drain pump and display an alarm.
9.11 Drain pump 1. PCB 2. Anti-boiling pressure switch AE2 3. Anti-boiling pressure switch AE1 4. Drain pump 9.12 Aqua Control The Aqua Control system is a sensor located in contact with the base frame. The sensor detects water leaks inside the machine (not only during normal operation, but also when the unit is off and plugged in) and starts the drain pump if a leak occurs. 1. 2. 3. 4. 5. 6.
9.13 1. 2. 3. 4. 5. Heating system Main board Anti-boiling pressure switch AE2 Anti-boiling pressure switch AE1 Heating element NTC temperature sensor The heating element is powered by a relay on the main board through the contacts on the pressure switches, which must be closed on “full”. 9.13.1 Heating element 1. Heating element (1950W) 2. NTC sensor 9.13.2 Temperature sensor The temperature is controlled by the main board using an NTC temperature sensor.
9.14 Turbidity sensor This sensor is installed only on machines equipped with a recirculation pump. 1. Housing 2. Electronic circuit 3. Transparent tube The sensor consists of a transparent tube installed in the water circulation circuit. A diode (4) on the side of the tube emits infrared rays (at a frequency of 2.3 KHz, as generated by the electronic circuit) and a phototransistor (5) on the other side of the tube is hit by the rays.
9.15 Motor 1. 2. 3. 4. PCB Motor Anti-boiling pressure switch AE1 Anti-boiling pressure switch AE2 M = rotor P = motor safety cut-out S = stator T = tachometric generator 9.16 Power supply to motor The PCB powers the motor via a triac. The direction of rotation is reversed by switching of the contacts on the two relays (K2-K3), which modify the connection between the rotor and the stator.
9.18 “FUCS” (Fast Unbalance Control System) rpm The control procedure for unbalanced loads is performed dynamically, before each spin cycle, as follows: ª The phase begins at a speed of 55 rpm; the speed can never fall below this threshold, otherwise the check is repeated. ª At intervals of 300 ms, the balance is calculated and compared with predetermined limits.
• Balancing in the available longer interval 1 2 Phase 1 2 3 4 5 6 7 • 3 4 5 Unbalancing index 0 1 2 3 1 2 3 6 7 Time-out (sec) 60 120 60 90 120 90 90 Unbalancing after all phases In this case the spin (or impulse) is not performed.
10 DRYING CIRCUIT 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Fan Fan motor Drying heater Heater casing Duct Door seal Tub Tube from tub to condenser Drying condenser Coupling Water fill solenoid Condenser water intake and steam vent tube 13. Drain filter 14. Drain pump Automatic drying cycles: the drying time is governed by the microprocessor so that the desired degree of dryness is achieved. The drying cycle can be performed at the end of the washing cycle, or as a separate programme.
10.1 Temperature control The drying temperature is controlled by an NTC sensor positioned on the duct. The heater casing features two safety thermostats (one of which is a manual-reset type). 1. 2. 3. 4. 5. 6. 7. 8. 9. Circuit board Anti-boiling pressure switch AE1 Safety thermostat (auto-reset) Drying heater Safety thermostat (manual reset) Anti-boiling pressure switch AE2 Fan motor Drying control sensor (NTC) Humidity control sensor (NTC) 1. Drying temperature control thermostat (NTC) 2.
11 DEMO Mode A special cycle has been created for demonstration of the operation of these appliances in retail outlets without connecting the appliance to the water supply. In this way, the salesman can select any programme; after starting the cycle by pressing START, the appliance will perform certain phases only, and will skip those which cannot be performed (water fill, drain, heating). The cycle takes place as follows: ª the door locking device is actioned in the normal way (i.e.
12 DIAGNOSTICS SYSTEM 12.1 Access to diagnostics system Using a single procedure, it is possible to access to the diagnostics system. After accessing this function, the following operations can be performed: control of the operation of each of the components in the appliance read / cancel the alarms The diagnostics cycles are available only if the communication between the main PCB and the display board is correct; moreover there should not be configuration errors of the appliance.
Diagnostics phases Selector position Components actioned Operating conditions All the LEDs light in sequence.
12.3.1 Display board diagnostics After entering the diagnostics system, the display board is checked: all LEDs and the display light in sequence (if featured). Pressing all buttons, the corresponding LEDs switch on or those closer; the display shows the hexadecimal code corresponding to the button codification.
12.3.2 Programme selector In the table are indicated the closures between the contact C6 (common) and the other contacts (C1−C5) of the programme selector in the different positions and the corresponding codification. The code is displayed only in the appliances with display.
13 ALARMS 13.1 Displaying the alarms to the user (for appliances with Display) Control of the alarm system can be configured; according to the model, therefore, some or all of the alarms may be displayed to the user.
13.2 Reading the alarm codes In order to read the last alarm code memorized in the EEPROM on the PCB: • Enter diagnostics mode • Irrespective of the type of PCB and configuration, turn the programme selector clockwise to the tenth position. 13.2.1 Displaying the alarm The alarm is displayed by a repeated flashing sequence of the two LEDs (0.4 seconds lit, 0.4 seconds off, with an interval of 2.5 seconds between sequences).
13.2.3 Operation of alarms during diagnostics All alarms are enabled during the components diagnostics phase. Moving the selector to pass from one control phase to the other, the appliance exits the alarm condition and performs the selected phase (if the alarm does not occur again). 13.3 Notes about some alarms Configuration alarms ª E91: the error is indicated by the flashing of all LEDs, E90 is displayed on the display, if featured.
13.6 Table of alarm codes Alarm Description E11 Poor water fill before wash cycle E12 E13 E21 E22 Difficulty in water fill during drying (maximum time Tap closed or water pressure too low; solenoid valve; pressure 3 min. water fill in drying during the wash load switch water circuit; pressure switches; wiring; main board.
Alarm E39 E3A Description Sensing circuit on anti-boiling pressure switch 1 defective Sensing circuit on anti-boiling pressure switch 2 defective Internal pressure takeoff is clogged (water level does not change for at least 30 sec. of drum rotation).
Alarm E84 E85 E91 E92 E93 E94 E95 E97 EB1 EB2 EB3 EC1 EC2 EC3 EF1 EF2 EF3 EF4 Description Possible fault "Sensing" circuit on circulation pump triac faulty PCB (input signal to microprocessor always 0V or 5V) Circulation pump faulty Circulation pump; (incongruency between status of "sensing" circuit wiring; on circulation pump and status of TRIAC) main PCB Communication incongruence between main PCBWiring faulty; Faulty control/display board display board Main PCB faulty.
14 Operating time counter It is possible to display, with a specific procedure, the operating time of the appliance, which is counted from the first switching on. This option is available only in models with display. The maximum memorization capacity is 6550 operating hours.
15 ACCESSING COMPONENTS Procedures for accessing specific components on the appliance are described in this section. For information on other procedures, see the general service manual for P6000 washing machines (599 35 2317) 15.1 The electrical components must be serviced by qualified personnel only Unplug the appliance before accessing internal components Flow meter If the flow meter malfunctions, the entire solenoid valve assembly must be replaced. 15.
15.3 Turbidity sensor ª Disconnect the connector. ª Loosen the clamps (shown by the arrows) and remove the tubes from the sensor unit. 15.3.1 Installing the turbidity sensor 1. Connection to recirculation pump. 2. End that is inserted into the bellows around the door.
16 BASIC CIRCUIT DIAGRAM WD SOI/DT 2005-01 dmm 64/67 599 36 82-59
16.1 Key for circuit diagram WD 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.
17 BASIC CIRCUIT DIAGRAM WM SOI/DT 2005-01 dmm 66/67 599 36 82-59
17.1 Key for circuit diagram WM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25.
