SERVICE MANUAL WASHING ELECTROLUX ZANUSSI S.p.A. Corso Lino Zanussi,30 I - 33080 PORCIA /PN (ITALY) Tel +39 0434 394850 Fax +39 0434 394096 Publication no. 599 34 55-61 EN/SERVICE/EB WASHING MACHINES & WASHER DRYERS WITH EWM2000 ELECTRONIC CONTROL Styling: Multipanel (Built-in) TSE-P Production: Porcia/PN (IT) Edition: 15.01.2001 TSE-P 01.
CONTENTS GENERAL CHARACTERISTICS .............................................................. page 3/56 CONTROL PANEL .................................................................................... Control/display board ................................................................................. page 4/56 page 5/56 WASHING PROGRAMMES ...................................................................... Programme selector ......................................................................
GENERAL CHARACTERISTICS Washing machines/washer-dryers with EWM2000 electronic control system: - electronic pressure switch - anti-foam control function - unbalance control system FUCS - jetsystem or traditional washing system - "Total exchange" jetsystem or traditional rinse system - spin speeds up to 1600 rpm - commutator motor AC or DC with separate converter - heating element in the tub, 1950W - water condensation drying system - automatic or time-controlled drying cycles - 550 + 550 W drying heater T
CONTROL PANEL The control panel fitted to the appliance may be different depending on: Þ the control/display board (3 versions) Þ the programme selector Þ the different design of the panel (on the number of buttons, LEDs) Þ the different configuration of the buttons Control panel example: GENERAL FEATURES Programme selector: - 24, 21 o 12 positions Main switch: - bipolar switch Push-buttons: - maximum 8, horizontal position LED: - maximum 28, green for the wash functions, orange for the drying functions (w
CONTROL/DISPLAY BOARD 1. Version with display (washing machines and washer/dryers): Þ 3 digits Þ 28 LEDs Þ 8 buttons 2. Version without display (washing machines): Þ 21 LEDs Þ 6 buttons 3. Version without display (washing machines): Þ 14 LEDs Þ 6 buttons TSE-P 01.
WASHING PROGRAMMES WASHING PROGRAMMES (24 position selector knob – WM & WD) No.
WASHING PROGRAMMES (12 position selector knob – WM) No. Programme Temperature 1 2 3 4 5 6 7 8 9 CANCEL (RESET) COTTON (WHITE) COTTON (COLOUREDS) SYNTHETICS DELICATES WOOL HAND WASH SOAK RINSES (if spin >700: cotton rinses) RINSES (if spin ≤700: delicate rinses) DRAIN SPIN (if spin >700: cotton spin) SPIN (if spin ≤700: delicate spin) MINIPROGRAMME -90° ÷ 0°C 60° ÷ 0°C 60° ÷ 0°C 40° ÷ 0°C 40° ÷ 0°C 40° ÷ 0°C 40° C -----60° ÷ 0°C 10 11 12 No.
PUSH-BUTTON FUNCTION The buttons’ function can be configured, and therefore it varies according to the model.
“ON/OFF” button Press this button to switch the machine on. Press it again to switch the machine off. WASHING CYCLE OPTIONS The washing cycle options should be entered after selecting the desired programme (using the selector knob) and before pressing START/PAUSE. When the button is pressed, the corresponding LED lights up; by pressing the button again the LED switches off.
“PREWASH” button This option selects an additional prewash phase at 30º C at the beginning of the cycle, followed first by a drain phase and then by the next phase. In the COTTON and SYNTHETICS cycles also a short spin phase is performed. The prewash option can cannot be selected for WOOL cycles, nor in conjunction with the STAIN option. "STAINS" button The STAINS option can be selected in the COTTON, SYNTHETICS and DELICATES cycles with temperatures of 40ºC or higher.
“RINSE HOLD” button When this option is selected the cycle ends leaving water in the tub after the final rinse to prevent fabrics from creasing. In the RINSE HOLD phase, the final spin speed can be modified; press the START/PAUSE button to complete the cycle, or select a new drain or spin programme. In this case turn the knob on the CANCEL position, before the new programme is selected.
“REDUCED SPIN SPEED” button When this button is pressed, the speed of the final spin in COTTON cycles is reduced to 650 rpm.; in the SYNTHETICS, DELICATES and WOOL cycles it is reduced to 500 rpm. When the RINSE or SPIN cycles are selected, the spin structure changes from the COTTON to the DELICATES spin. “DELAYED START” button Models with digit: This button can be used during the programme selection phase to enter a delayed start time (from 1 to 24 hours).
“ELECTRONIC DRYING” button (WASHER-DRYERS, certain models only) It is possible to select two different electronic levels of dryness: one for COTTON and one for SYNTHETICS cycles: Þ Extra dry (only cotton) Þ Store dry (cotton and synthetics) Þ Iron dry (only cotton) The drying time is automatically calculated by the "Fuzzy" logic.
DISPLAY The display shows the following information: Þ three flashing lights, when the appliance is switched on. Þ the wash programme duration; it is shown up after the programme has been selected. The time corresponding to the maximum wash load is shown up. While performing the cycle, the time decreases (updated) every minute. Þ the drying programme duration (washer-dryers), which is displayed during the phase of selection of the drying time.
WASHING PROGRAMMES (SEQUENCE CHARTS) Calibration WC RPC DPC MC OFF ON LEV ELV2 ELV3 ELV2 ELV3 NR VT WL AB Dis En OFF ON LEV Tout TMP Code D_MOV E_MOV E1_MOV SE_MOV N_MOV PWL1_MOV PWL3_MOV PWL4_MOV COLD_MOV CR3_MOV DLD_MOV DRY_MOV TSE-P 01.
SE Movement: VT movement during rinses in "jetsystem total exchange" COTTON programmes (virtual tank): During these phases, in which the motor rotates at high speed, if the electronic pressure switch detects that the water in the tub falls below a certain level, the following operations are performed: spin at 470 rpm (VT_MOV_CODE) to remove the water from the fabrics and therefore to increase the level in the tub.
Step n.° 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 32 33 34 35 36 37 PHASE WASH 1st RINSE 2nd RINSE 3rd RINSE (softener) SPINNING TSE-P 01.
Step n.° 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 Phase WASH 1st RINSE 2nd RINSE 3rd RINSE (softener) SPINNING TSE-P 01.
Step n.° 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 32 33 PHASE SPINNING 3rd RINSE 2nd RINSE (softener) 1st RINSE WASH TSE-P 01.01 EB 40/15 40/15 145/90 40/15 125/70 40/15 125/70 95/65 40/15 wc Levels dpc Drain Elv / Det Movement pump comp.
Step n.° 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 TSE-P 01.
step n 1 2 3 4 5 6 7 step n 1 2 3 4 5 6 TSE-P 01.
“FUCS” (Fast Unbalance Control System) The control procedure for unbalanced loads is performed dynamically, before each spin cycle, as follows: 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 400 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 is higher, the speed of the drum is reduced by 2 rpm.
Load balanced after few attempts: A: low speed B: FUCS phase 1 C: normal spin Load balanced after second phase: A: low speed B: FUCS phase 1 with pulse at 470 rpm C: low speed D: FUCS phase 2 E: normal spin Load balanced after second phase and anti-foam control function: A: low speed B: FUCS phase 1 with pulse at 470 rpm C: low speed D: FUCS phase 2 E: spin with anti-foam function F: low speed G: FUCS phase 3 H: normal spin Load slightly unbalanced after third phase: A: low speed B: FUCS phase 1 with puls
SPIN CYCLES IMP_C0 spin: pre-wash - COTTONS and SYNTHETICS, penultimate rinse - SYNTHETICS IMP5 spin: final - SYNTHETICS IMP7 spin: final - DELICATE FABRICS TSE-P 01.
IMP4 spin: final - WOOL IMP6 spin: first intermediate spin - rinses – COTTON (maximum speed can be configured) IMP6-RINSE spin: intermediate rinses COTTON (maximum speed can be configured) TSE-P 01.
IMPCF_1_AC spin: final – COTTON (AC motors) IMPCF_1_AC spin: final – COTTON (DC motors) TSE-P 01.
TECHNICAL CHARACTERISTICS EWM 2000 ELECTRONIC CONTROL UNIT 1. Main PCB 2. Control/Display Board BUZZER CONTROL/DISPLAY BOARD PROGRAMME SELECTOR Microprocessor MAIN BOARD ELECTRICAL LOADS SENSORS Microprocessor The main PCB performs the following functions: - acquisition of the wash cycle settings via the control/display board. control of the water level in the tub via the electronic pressure switch and the safety pressure switch. control of the temperature of the washing solution via an NTC sensor.
MICROPROCESSOR MEMORY (MAIN PCB) ROM GENERAL INSTRUCTIONS RAM PROGRAMME VARIABLES EEPROM POWER FAIL & MACHINE STATUS CYCLE PARAMETERS MACHINE CONFIGURATION 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.
ELECTRONIC PRESSURE SWITCH The electronic pressure switch is an analog 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.
INSTANTANEOUS DOOR SAFETY DEVICE Certain models are fitted with an instantaneous door safety device; this means that the door can be opened as soon as the drum stops rotating. 1. 2. 3. 4. 5. 6. 7. PTC solenoid protector Solenoid Lever mechanism Cam PTC - bimetal Electrical contacts (main switch) Latch 1. 2. 3. 4. 5.
DETERGENT DISPENSER Water is ducted into the detergent dispenser by a solenoid valve with one inlet and two or three outlets. Some models are fitted with a second solenoid valve for hot water fill. The same detergent dispenser is used in all models; the only difference lies in the water intake nozzle. The detergent dispenser may consist of three or four compartments. 1. Solenoid valve 2.
Water fill to conditioner compartment (pre-wash and wash solenoids) Water fill to bleach compartment (bleach solenoid) Hot water fill (hot water/wash solenoids) TSE-P 01.
Power supply to the motor The main PCB powers the motor directly via a TRIAC. Reversal of the direction of the motor is effected by two relays that vary the connection between the rotor and the stator. A third relay powers the stator in half- or full-range operation, depending on the spin speed. The speed of the motor is controlled by a signal received from the tachometric generator. During the spin cycles, the microprocessor checks for an unbalanced load and for excessive foam.
Circulation pump In Jetsystem models, the circulation pump is powered directly by the main PCB via a TRIAC Heating The heating element is powered directly by the main PCB via a relay. As a safety feature, a traditional dual-level pressure switch (anti-boiling 1 and anti-boiling 2) is connected in series to the heating element. The temperature is controlled directly by the main PCB via an NTC temperature sensor.
DRYING (washer/dryers only) The drying system is identical to that used for washer/dryers with traditional timers. 1. Fan 2. Fan motor 3.Drying heating elements 4. Heating element casing 5. Duct 6. Door gasket 7. Tub 8. Tub-condenser hose 9. Drying condenser 10. Manifold 11. Condensation water inlet valve 12. Condenser-manifold pipe 13. Body filter 14. Drain pump Automatic drying cycles: the drying time is controlled by the microprocessor to provide the desired level of humidity.
Temperature control: An NTC sensor fitted to the duct is used to control the drying temperature; two safety thermostats (one of which is a manual-reset type) are fitted to the casing of the heating element. 1. NTC sensor for control of drying temperature 2. Safety thermostat (98°C) 3. Manual-reset safety thermostat (150°C) 4. Drying heater Determining the drying time: In automatic cycles, the NTC sensor fitted to the drying condenser is used to control the drying time. 1. 2. TSE-P 01.
ACCESS TO THE DIAGNOSTICS / CONFIGURATION SYSTEM Using a single procedure, it is possible to access both the diagnostics and configuration systems. After accessing this function, the following operations can be performed: - configuration of the main PCB - analysis of alarm conditions - control of the operation of each of the components in the appliance. To access the system: switch off the appliance and turn the programme selector knob to RESET.
DIAGNOSTICS SYSTEM The diagnostics system is used to check the operation of all the components of the washing machine. After accessing the diagnostics routine (see "Access to the diagnostics / configuration system"), the correct operation of each component can be checked by turning the programme selector knob clockwise. CHECKING THE DISPLAY BOARD When the knob is in the first position (RESET) (after accessing the diagnostics system), the system checks the display board.
DIAGNOSTICS CYCLE Correct operation of all the components in the appliance can be checked by turning the programme selector knob clockwise. The diagnostics cycles can be performed only if there is correct communication (connection) between the main PCB and the display board; also, the configuration of the appliance must be correct. The wash phase LEDs (and the display, if featured) show the binary code representing the closure of the programme selector contacts for two seconds.
DIAGNOSTICS CYCLE PHASES Knob position 1 2 3 4 5 6 7 8 9 Function tested Operation of the display board Water fill to wash compartment Water fill to pre-wash compartment Water fill to conditioner compartment Hot water fill or fill to bleach compartment (certain models only) Heating (and, in Jetsystem models, recirculation) Check for leaks from tub Drain and spin, check for pressure switch congruency Components actioned All the LEDs light in sequence.
PROGRAMME SELECTOR The table below shows the closure sequence of contact C6 (common) and the other contacts (C1 - C5) of the programme selector in the various positions, as well as the light-up sequence of the display. 24-position selector knob 1 - Reset 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 TSE-P 01.
ALARMS The electronic control unit detects and recognises any malfunctions in the operation of the appliance, in which case an alarm condition is generated. Alarm conditions may be of three types: - cycle paused cycle blocked current phase skipped Only four alarm conditions are normally displayed to the user: problems with water fill problems with drain door open communication error between the electronic boards, or configuration error.
READING THE LAST ALARM CONDITION The diagnostics system makes it possible to identify the last alarm condition which occurred during the operation of the appliance. to read this alarm condition, after accessing the diagnostics system (see "Access to the diagnostics / configuration system), turn the programme selector knob two positions counter-clockwise from the RESET position. The alarm condition is displayed; the corresponding binary code flashes on the wash phase LEDs (and on the display).
0:LED off Alarm code E11 E12 E21 E22 E31 E32 E33 E34 E35 E36 TSE-P 01.
E37 E38 E41 E42 E43 E44 E45 E51 E52 E53 E54 TSE-P 01.
E55 E61 E62 E64 E66 E71 E72 E73 E84 E85 E91 TSE-P 01.
E92 E93 E94 EF1 EF2 EF3 0:LED off TSE-P 01.
CANCELLING THE LAST ALARM CONDITION To cancel the last memorised alarm condition, press START/PAUSE button and no. 4 button at the same time during the course of the diagnostics cycle. The alarm is cancelled also when a new configuration is given to the main PCB. TSE-P 01.
CONFIGURATION OF THE MAIN PCB A standard main PCB is available as a spare part. This PCB contains only data relative to the wash cycle. After replacing the main PCB, it is necessary to perform the configuration procedure in order to operate the washing machine. Configuration of the board consists of entering a 16-digit code which contains information which varies from model to model (type of washing system, type of tub, type of appliance, spin speed, etc.).
CONFIGURATION CODE The configuration code (16 alphanumeric digits) shown on a label affixed to the casing of the main PCB and in the Service Notes describing the various models. It is advisable to note the configuration code on the casing of the new PCB fitted to the washing machine. READING THE CONFIGURATION CODE The configuration code is shown, one character at a time, on the display (if featured) or on the washing phase display LEDs.
EXAMPLES OF CONFIGURATION Configuration code: A2A7808080E691F2 POSITION: 0 1 2 3 4 5 6 7 8 9 VALUE: ↓ A ↓ 2 ↓ A ↓ 7 ↓ 8 ↓ 0 ↓ 8 ↓ 0 ↓ 8 ↓ 0 10 (A) ↓ E 11 (B) ↓ 6 12 (C) ↓ 9 13 (D) ↓ 1 14 (E) ↓ F 15 (F) ↓ 2 TABLE OF CYCLE PHASE LEDS On models not featuring the display window, it is advisable, before beginning the configuration procedure, to convert the digits of the configuration code into binary format.
EXITING THE DIAGNOSTICS CYCLE To exit the diagnostics cycle, switch the appliance off, on, and then off again. TSE-P 01.
TSE-P 01.
TSE-P 01.
1. Main PCB 2. Control/display board 3. Programme selector 4. Buzzer (certain models only) 5. Anti-interference filter 6. ON/OFF button 6a.Pilot lamp 7. Door interlock 8. Electronic pressure switch 9. NTC temperature sensor (washing) 10. Anti-boiling pressure switch 1 11. Heating element (washing) 13. Motor 12. Anti-boiling pressure switch 2 14. Recirculation pump (Jetsystem models) 15. Drain pump 16. Pre-wash solenoid 17. Wash solenoid 18. Bleach solenoid or hot water solenoid (certain models only) 19.
NOTES FOR THE REPLACEMENT OF THE CONTROL DISPLAY/BOARD When replacing the control/display board, before fitting the new part, cut the 5 plastic hooks placed on the PCB casing (see figure). TSE-P 01.
