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Washing machine circuit diagram

Electrical components – appliance Components of electronic circuit board

1. Circuit board
2. Suppressor
3. Main switch (on programme selector)
4. Door safety interlock
5. 1st level pressure switch
6. Anti-boiling pressure switch
7. Anti-overflow pressure switch (certain models only)
8. Heating element
9. Stator (motor)
10. Overload circuit-breaker (motor)
11. Tachymetric generator (motor)
12. Rotor (motor)
13. Drain pump
14. Pre-wash solenoid valve
15. Washing solenoid valve
16. “Door closed” lamp (certain models only)
17. Drum positioning system (DSP) (top-loaders – certain models only)
DOOR_TY Triac for door safety interlock
DRAIN_TY Triac for drain pump
K1 Heating element relay
K2 Motor relay: clockwise rotation
K3 Motor relay: anti-clockwise rotation
K4 Motor relay: half-range power (certain models only)
MOTOR_TY Motor triac
ON/OFF Main switch (programme selector)
PWELW_TY Triac for pre-wash solenoid valve
Serial interface Asynchronous serial interface
WELV_TY Triac for washing solenoid valve

In case of burning on the main circuit board, check that the problem is not caused by another electrical component (short-circuits, poor insulation, water leakage).

Refer to the figures below in order to identify the component that might have caused the burning according to the position of the burned area.

The circuit board shown below is the version with the greatest number of components: other boards may not feature all these components (relay K4 and buzzer).

 

Table of alarms error codes EWM1000

AlarmDescriptionPossible faultAction/Machine statusReset
E00No alarm
E11Difficulty in filling during wash phaseTap closed or water pressure insufficient; Drain hose incorrectly positioned; Water fill solenoid faulty; Leaks from pressure switch hydraulic circuit; Pressure switch faulty; Wiring faulty; Circuit board faulty.Cycle paused, door closedStart
E13Water leakageDrain hose incorrectly positioned; Water pressure insufficient; Water fill solenoid faulty; Leaks or blockage in pressure switch hydraulic circuit; Pressure switch faulty; Circuit board faulty.Cycle paused, door closedStart
E21Difficulties in drainingDrain hose kinked/blocked/incorrectly positioned; Drain filter clogged or dirty; Drain pump faulty; Pressure switch faulty;
Wiring faulty; Circuit board faulty; Current leakage from heating element to ground.
Cycle pausedStart
E23Drain pump triac faultyDrain pump faulty; Wiring faulty; Circuit board faulty.Safety drain – Cycle stopped, door openSelector on “0”
E24Problems with «sensing» of drain pump triacCircuit board faulty.Safety drain – Cycle stopped, door releasedSelector on “0”
E33Incongruence between contact closure of anti-
boiling and 1st level of pressure switch
Pressure switch faulty; Current leakage from heating
element to ground; Heating element; Wiring faulty; Circuit
board faulty.
Safety drain – Cycle stopped, door openSelector on “0”
E35Water overflowWater fill solenoid faulty; Leaks from pressure switch hydraulic circuit; Pressure switch faulty; Wiring faulty; Circuit board faulty.Cycle blocked, door closed. Safety drain.
Drain pump (sequence 5 min. ON – 5 min.
OFF)
Selector on “0”
E36«sensing» circuit of anti-boiling pressure switch
faulty
Circuit board faulty.Cycle blocked, door closedSelector on “0”
E37«sensing» circuit of 1st level faultyCircuit board faulty.Cycle blocked, door closedSelector on “0”
E39HV «sensing» circuit of anti-flooding pressure
switch faulty
Circuit board faulty.Cycle blocked, door closedSelector on “0”
E41Door openDoor safety interlock faulty; Wiring faulty;
Circuit board faulty.
Cycle pausedStart
E42Problems with aperture of doorDoor safety interlock faulty; Wiring faulty;
Circuit board faulty
Cycle pausedStart or Selector
on “0”
E43Power triac on door interlock faultyDoor safety interlock faulty; Wiring faulty;
Circuit board faulty.
Safety drain, door releasedSelector on “0”
E44Door interlock «sensing» faultyCircuit board faulty.Safety drain, door releasedSelector on “0”
E45«sensing» on door interlock triac faultyCircuit board faulty.Safety drain, door releasedSelector on “0”
E51Motor power triac short-circuitedCircuit board faulty;
Current leakage from motor or wiring.
Cycle blocked, door closed (after 5 attempts in diagnostics or immediate during selection)Selector on “0”
E52No signal from motor tachimetric generatorMotor faulty; Wiring faulty;
Circuit board faulty.
Cycle blocked, door closed (after 5 attempts in diagnostics or immediate during selection)Selector on “0”
E53«sensing» circuit on motor triac faultyCircuit board faulty.Cycle blockedSelector on “0”
E54Motor relay contacts stickingCircuit board faulty;
Current leakage from motor or wiring.
Cycle blocked, door closed (after 5 attempts in diagnostics or immediate during selection)Selector on “0”
E61Insufficient heating during washingNTC sensor faulty; Heating element faulty; Wiring faulty;
Circuit board faulty.
Heating phase skipped
E62Overheating during washingNTC sensor faulty; Heating element faulty; Wiring faulty;
Circuit board faulty.
Safety drain (with cooling water fill) – Stop with door openSelector on “0”
E66Power relay for heating element faultyCircuit board faulty; Current leakage from heating element
or wiring to ground.
Safety drain (with cooling water fill) – Stop with door openSelector on “0”
E71NTC washing sensor faultyNTC sensor faulty; Wiring faulty;
Circuit board faulty.
Heating phase skipped
E82Error in reset position of selectorCircuit board faulty.Cycle cancelledSelector on “0”
E83Error in reading selector positionConfiguration data incorrect; Circuit board faulty.During the cycle continues normally, switches off completely during selection
E93Incorrect machine configurationConfiguration data incorrect; Circuit board faulty.Appliance blockedSelector on “0”
E94Incorrect washing cycle configurationConfiguration data incorrect; Circuit board faulty.Appliance blockedSelector on “0”
E95Communications error between microprocessor
and EEPROM
Circuit board faulty.Appliance blockedSelector on “0”
E96Incongruence between hardware version and
configuration.
Configuration data incorrect; Circuit board faulty.Appliance blockedSelector on “0”
E97Incongruence between programme selector and
cycle configuration
Configuration data incorrect; Circuit board faulty.Appliance blockedSelector on “0”
EB1Power supply frequency of appliance incorrectMains power supply problems (incorrect / interference); Circuit board faulty.Cycle blocked until normal power supply
conditions are restored
Selector on “0”
EB2Voltage too highMains power supply problems (incorrect / interference); Circuit board faulty.Cycle blocked until normal power supply
conditions are restored
Selector on “0”
EB3Voltage too lowMains power supply problems (incorrect / interference); Circuit board faulty.Cycle blocked until normal power supply
conditions are restored
Selector on “0”

Notes concerning certain alarm codes

  • Configuration alarms E93-E96: If these alarms are generated (when the appliance is switched on), operation of the appliance is blocked and all the LEDs light. The diagnostics procedure cannot be accessed; the only option is to switch the appliance OFF (by turning the selector to position “0”).
  • Configuration alarm E94: For this alarm code, only the family for alarm “9” is displayed; the diagnostics procedure cannot be accessed, and the “rapid alarm display” function cannot be used.
  • Alarms EB1-EB2-EB3: In the event of problems with the mains power supply, the appliance remains in alarm mode until the mains frequency or voltage are restored to the correct value or the appliance is switched off (by turning the programme selector to “0”). The family of alarm “B” is displayed; the diagnostics procedure cannot be accessed, and the “rapid alarm display” function cannot be used. The complete alarm code can be read only when the abnormal situation has ceased.
  • Alarms E51- E52: During the diagnostics test, all the alarms are displayed. Normally, when the programme selector is turned from one test phase to another, the appliance exits the alarm condition and performs the phase selected. This does not take place in the case of alarms E51 (power triac on motor short-circuited) and E52 (no signal from the tachymetric generator on the motor): in these cases, the only option to exit the alarm condition is to switch the appliance OFF by turning the selector to position “0” (reset).

PNC_ELCPlatformPubModelBrandNameProdDate
91478076000EWM1000599368272004541_20332Privileg20050121
91478081201EWM1000599383637004541_20556Privileg20061013
91479143100EWM1000599382448017127_20714Privileg20060901
91479251300EWM1000599358982017848_20169Privileg20030530
91479111100EWM1000599352634018454_20068Privileg20020529
91479251400EWM1000599358983060854_20170Privileg20030530
91479251600EWM1000599358984077791_20167Privileg20030530
91479117800EWM1000599359802092676_20203Privileg20030704
91479118000EWM1000599359804147230_20205Privileg20030704
91479129400EWM1000599369226175401_20350Privileg20050304
91479129401EWM1000599384033175401_20350Privileg20051223
91479123900EWM1000599364415204404_20267Privileg20040521
91479112300EWM1000599354477206304_20125Privileg20020920
91478074100EWM1000599366376210865_20294Privileg20040917
91478081501EWM1000599379091210865_20553Privileg20060505
91479117500EWM1000599358977212234_20163Privileg20030530
91479117501EWM1000599383883212234_20163Privileg20051223
91479117502EWM1000599383762212234_20163Privileg20050930
91479134900EWM1000599374470212234_20508Privileg20051223
91479117200EWM1000599358971220052_20162Privileg20030530
91479117201EWM1000599383813220052_20162Privileg20051223
91479134600EWM1000599374252220052_20162Privileg20051216
91479252700EWM1000599362061236247_20237Privileg20031212
91478072300EWM1000599362321238913_20256Privileg20040116
91478072301EWM1000599385040238913_20256Privileg20060130
91452102000EWM1000599384068239359_20731Privileg20061103
91452102001EWM1000599386569239359_20731Privileg20070309
91479111200EWM1000599352635266391_20060Privileg20020529
91479111500EWM1000599352737266412_20062Privileg20020607
91479111700EWM1000599352770266471_20064Privileg20020607
91479117100EWM1000599358968308637_20161Privileg20030530
91479117101EWM1000599383805308637_20161Privileg20051223
91479134500EWM1000599374435308637_20161Privileg20051216
91428108300EWM1000599374182323219_20428Privileg20051202
91428113400EWM1000599376974323219_20615Privileg20060310
91428113401EWM1000599384138323219_20615Privileg20060508
91452000600EWM1000599380875362749_20405Privileg20060623
91479117700EWM1000599359801452546_20202Privileg20030704
91479142800EWM1000599381611460004_20768Privileg20060721
91475656600EWM1000599381512477164_20981Privileg20060714
91479136300EWM1000599373377490781_20416Privileg20051014
91479136301EWM1000599384040490781_20416Privileg20051223
91479139600EWM1000599383830490781_20560Privileg20060224
91428107701EWM1000599372276494279_20394Privileg20050729
91428113601EWM1000599387956494279_20580Privileg20070105
91452000500EWM1000599380873497203_20404Privileg20060623
91478072200EWM1000599362320582603_20225Privileg20040116
91479252800EWM1000599362062601996_20234Privileg20031212
91478076100EWM1000599368273610348_20333Privileg20050121
91478081301EWM1000599383693610348_20557Privileg20061020
91479111600EWM1000599352766614643_20063Privileg20020607
91479118100EWM1000599359805637773_20206Privileg20030704
91479117900EWM1000599359803637774_20204Privileg20030704
91479250100EWM1000599355618651591_20118Privileg20021129
91479141200EWM1000599377070658783_20644Privileg20060310
91478082800EWM1000599379661706187_20679Privileg20060526
91478082801EWM1000599383694706187_20773Privileg20061020
91479271700EWM1000599366663708759_20296Privileg20041001
91479115800EWM1000599360157743422_20155Privileg20030725
91479115800EWM1000599369270743422_20155Privileg20050311
91479115801EWM1000599383802743422_20155Privileg20051223
91479117400EWM1000599358975746752_20165Privileg20030530
91479117401EWM1000599383881746752_20165Privileg20051223
91479134800EWM1000599374436746752_20510Privileg20051216
91479142000EWM1000599381012746752_20510Privileg20060630
91479142500EWM1000599381027751604_20710Privileg20060630
91479136200EWM1000599373376757299_20415Privileg20051014
91479136201EWM1000599384041757299_20415Privileg20051223
91479139500EWM1000599383838757299_20415Privileg20060303
91452000400EWM1000599381388783016_20406Privileg20060714
91421106100EWM1000599374184790215_20429Privileg20051202
91421113201EWM1000599376962790215_20616Privileg20060310
91421113202EWM1000599382055790215_20616Privileg20060811
91479140200EWM1000599374471795519_20455Privileg20051223
91478082900EWM1000599379662821084_20680Privileg20060526
91479111400EWM1000599352639829880_20065Privileg20020529
91479117300EWM1000599358972842040_20166Privileg20030530
91479117301EWM1000599383814842040_20166Privileg20051223
91479134700EWM1000599374433842040_20166Privileg20051216
91479110900EWM1000599352631865147_20066Privileg20020529
91452102100EWM1000599384071868028_20732Privileg20061103
91479120600EWM1000599362049873750_20235Privileg20031212
91479143000EWM1000599382446922987_20713Privileg20060901
91479252600EWM1000599362059927146_20236Privileg20031212
91479111300EWM1000599352636930777_20061Privileg20020529
91479117600EWM1000599358978932587_20164Privileg20030530
91479135000EWM1000599382307932587_20509Privileg20060825
91479130200EWM1000599370839933910_20376Privileg20050520
91479130201EWM1000599383944933910_20376Privileg20051223
91479134400EWM1000599382274933910_20507Privileg20060825
91478072400EWM1000599362322943365_20257Privileg20040116
91479111000EWM1000599352632945101_20067Privileg20020529
91479250000EWM1000599355617959720_20117Privileg20021129
91478081000EWM1000599374119969048_20434Privileg20051202
91478081100EWM1000599383783969048_20617Privileg20060203
91478081101EWM1000599383692969048_20771Privileg20061020
91421105801EWM1000599372275976357_20395Privileg20050805
91421113501EWM1000599378699976357_20581Privileg20060127
91421113502EWM1000599382075976357_20581Privileg20060811
91479117000EWM1000599358963993401_20168Privileg20030530

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1. PURPOSE OF THIS SERVICE MANUAL

The purpose of this Service Manual is to provide Service Engineers, who already have the basic knowledge necessary to repair household washing machines, with information of a general nature regarding the HEC range of washing machines.

More detailed information regarding specific models may be found in the Service Notes and Service

Manuals (issued separately) for each specific model or functionality.

This information covers:

  • Circuit diagrams
  • Exploded views of spare parts
  • Spare parts lists
  • Functions and diagnostics

2. IMPORTANT NOTES

  • Repairs to electrical appliances must be effected only by qualified personnel.
  • Before accessing the components inside the appliance, always remove the plug from the power socket.
  • Where possible, ohmic measurements should be effected rather than direct measurement of voltage and current.
  • Certain metal components inside the appliance may have sharp edges. Care should be taken to avoid cuts or abrasions.
  • Before laying the appliance on the floor, always drain any water by means of the system placed beside the drain filter.
  • Never lay the appliance on its right side (i.e. electronic control unit side); this would cause the water in the detergent dispenser to fall onto electrical components, thus damaging them.
  • After repairing the appliance, always perform the final tests.

3. CAUTION:

  • Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS of this publication. Remember: Safety First.
  • General Guidance An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line.
  • Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect the receiver and it’s components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.
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