Electrolux EWM10931 TC1, EWM10931 TC2, EWM10931 TC3 Schematic

SERVICE MANUAL

WASHING

Edition: 04/2012 - Rev. 00

Publication

number

599 75 27-46

Washing machines

guide to diagnostics of

electronic controls

EWM10931

THE INSPIRATION

RANGE

TC3 / TC2 / TC1

Guide to diagnostics of electronic controls EWM10931

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Guide to diagnostics of electronic controls EWM10931

Index

INTRODUCTION .................................................................................................................................. 5

1.1 Purpose of this manual .................................................................................................................. 5

1.2 Cautions ........................................................................................................................................ 5

1.3 How to proceed ............................................................................................................................. 6

2 WM APPLIANCE CONTROL PANELS ................................................................................................. 7

3 PROGRAMMING/UPDATING THE MAIN CIRCUIT BOARD ................................................................. 7

4 DIAGNOSTICS SYSTEM ..................................................................................................................... 8

4.1 Accessing diagnostics ................................................................................................................... 8

4.2 Quitting the diagnostics system ..................................................................................................... 8

4.3 Phases of the diagnostics test ....................................................................................................... 9

4.3.1 TC3-TC2 styling .................................................................................................................... 9

4.3.2 TC1 styling .......................................................................................................................... 11

5 ALARMS ............................................................................................................................................ 13

5.1 Displaying the alarms to the user ................................................................................................. 13

5.2 Reading the alarms ..................................................................................................................... 14

5.2.1 TC3-TC2 styling .................................................................................................................. 14

5.2.2 TC1 styling .......................................................................................................................... 14

5.3 Rapid reading of alarms ............................................................................................................... 14

5.4 Deleting the last alarm ................................................................................................................. 15

5.5 ALARM SUMMARY TABLE ......................................................................................................... 16

5.6 Notes on the behaviour of certain alarms ..................................................................................... 20

6 CANNOT ACCESS THE DIAGNOSTICS PROGRAMME .................................................................... 21

6.1 None of the LEDs on the circuit board light up ............................................................................. 21

7 TROUBLESHOOTING BASED ON ALARM CODES .......................................................................... 22

E11: Water fill difficulty during washing ............................................................................................ 22

E13: Water leaks ............................................................................................................................. 24

E21: Drain difficulty ......................................................................................................................... 26

E23: Problems with the component (triac) controlling the drain pump .............................................. 28

E24: Sensing circuit of the component (triac) controlling the drain pump faulty................................. 30

E31: The analogue pressure switch provides the main circuit board with a signal outside the limits. 30

E32: The analogue pressure switch causes an error during calibration ............................................ 31

E35: Water level too high ................................................................................................................ 32

E38: Internal pressure chamber is clogged ...................................................................................... 33

E41: Door open (device with 4 connections) .................................................................................... 34

E42: Problems opening door (device with 4 connections) ................................................................ 36

E43: Problems with the component (triac) controlling the door delay system (device with

4 connections) ........................................................................................................................ 38

E44: Door closed “sensing” circuit faulty .......................................................................................... 39

E45: Problems with the “sensing” circuit of the component (triac) controlling the door delay system . 39

E52: No signal from the motor tachimetric generator (1st part) ......................................................... 40

E52: No signal from the motor tachimetric generator (2nd part) ......................................................... 42

E57: Inverter is drawing more than 16A current ............................................................................... 44

E58: Inverter is drawing more than 4A current ................................................................................. 46

E59: No signal from the tachometric generator ................................................................................ 48

E5A: Overheating on Inverter board heat dissipator ......................................................................... 50

E5C: The Inverter board input voltage is too high (beyond 430 V) .................................................... 51

E5d: Data transfer error between Inverter board and main circuit board ........................................... 52

E5E: Communication error between Inverter board and main circuit board ...................................... 53

E5F: Inverter board fails to start the motor ....................................................................................... 53

E5H: The Inverter board input voltage is too low (less than 175 V) .................................................. 54

E62: Overheating during washing .................................................................................................... 55

E66: Heating element power supply relay faulty .............................................................................. 56

E68: Washing heating element leakage ........................................................................................... 57

E69: Washing heating element damaged ........................................................................................ 58

E6A: Heating relay sensing faulty .................................................................................................... 59

E6H: Heating element power relay faulty (incongruence between sensing and relay status) ............ 59

E71: Washing NTC probe faulty ...................................................................................................... 60

E74: NTC probe improperly positioned ............................................................................................ 61

E83: Error reading the programme selector code............................................................................. 62

E86: Programme selector configuration error................................................................................... 62

E87: Display board microprocessor faulty ........................................................................................ 62

E91: Communication error between the display board and the main circuit board (1st part) .............. 63

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E91: Communication error between the display board and the main circuit board (2nd part) ............. 64

E91: Communication error between the display board and the main circuit board (3rd part) .............. 65

E92: protocol incongruence ............................................................................................................. 66

E93: Appliance configuration error................................................................................................... 66

E94: Incorrect configuration of washing cycle .................................................................................. 66

E97: Inconsistency between control selector version and configuration data .................................... 66

E98: Communication error between main PCB and Inverter board .................................................. 66

E9C: Display board configuration error ............................................................................................ 67

E9E: Display board sensor/touch key faulty ..................................................................................... 67

EC1: Water fill solenoid valves blocked ........................................................................................... 68

EC2: Problem with weight sensor .................................................................................................... 69

EC3: Problem with weight sensor .................................................................................................... 70

EF1: Drain hose blocked/kinked/too high; drain filter clogged/dirty ................................................... 71

EF2: Excessive detergent dosing; drain hose kinked/blocked; drain filter dirty/clogged ................... 71

EF3: Aqua Control device triggered ................................................................................................. 71

EF4: Water fill pressure too low and solenoid valve open ................................................................ 71

EF5: Unbalanced load, spin phases skipped. .................................................................................. 71

EF6: Reset appliance. ..................................................................................................................... 72

EH1: Mains frequency incorrect ....................................................................................................... 72

EH2: Supply voltage too high .......................................................................................................... 72

EH3: Supply voltage too low ............................................................................................................ 73

EH4: “zero watt” relay not functioning .............................................................................................. 73

EHE: Inconsistency between safety relay (main circuit board) and safety sensing circuit ................. 73

EHF: Safety sensing circuit faulty .................................................................................................... 73

8 WM OPERATING CIRCUIT DIAGRAM ............................................................................................... 74

8.1 Key to circuit diagram WM ........................................................................................................... 75

8.2 Main circuit board connectors ...................................................................................................... 76

8.3 Burns on the main circuit board EWM10931 ................................................................................ 77

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1 INTRODUCTION

1.1 Purpose of this manual

The purpose of this manual is to explain, simply and schematically, the steps any Technician must take when faced with the problems indicated by the various alarm codes on appliances with electronic control in the EWM10931 TC1-TC2-TC3 THE INSPIRATION RANGE.

Depending on the appliance configuration, the alarms may be entirely or partially displayed to the user: the latter solution is usually adopted. The diagnostics system is used by Service Technicians to:

♦ Read alarms ♦ delete the alarm stored, ♦ Test the appliance operation.

1.2 Cautions

 Any work on electrical appliances must only be carried out by qualified personnel.

 Before servicing an appliance, check the efficiency of the electrical system in the

home using appropriate instruments. For example: refer to the indications provided/illustrated in the <<metratester>> course at the address (http://electrolux.edvantage.net

) on the Electrolux Learning Gateway portal.

When the work is finished check that the equipment's safety conditions have been reinstated, as though it were straight off the assembly line.

 If the circuit board has to be handled/replaced, use the ESD kit (Cod. 405 50 63-95/4)

to avoid static electricity from damaging the circuit board, see S.B. No. 599 72 08-09 or consult the course “Electrostatic charges” at the address (http://electrolux.edvantage.net

) on the Electrolux Learning Gateway portal.

 This platform is not fitted with an ON/OFF switch. Before you access internal

components, take the plug out of the socket to cut the power supply.

 Make resistance measurements, rather than direct voltage and current

measurements.

 Warning the sensors located on the display board could be at a potential of

220 Volts.

 When replacing the heating element, replace it with one

that has the same characteristics (2 thermal fuses) in order not to compromise the safety of the appliance. Do not remove/switch the NTC sensors between heating elements.

 Always empty the appliance of all the water before laying it

on its side.

 Never place the appliance on its right side (electronic control system side):

some of the water in the detergent dispenser could leak onto the electrical/electronic components and cause these to burn.

 When replacing components, please refer to the code shown in the list of spare

parts relating to the appliance.

 The resistance values of the components shown in this S.M. are purely

indicative (relating to a sample appliance with new components).

For the actual value of the component, please refer: to S.B. 599706597 for motors, and for the other components, please consult S.M. 599728903 “Component Characteristics”.

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1.3 How to proceed

1. Identify the type of control in question (page 7) and access the diagnostic cycle. (see page 8)

2. Read the alarm stored (page 14) and consult the instructions regarding the “alarm codes”, page 16÷19

3. Delete the alarms stored (page 15)

4. If you are unable to access the diagnostic mode, consult the chapter entitled “The diagnostics system

cannot be accessed” (page 21)

5. Should the main electronic circuit board need to be replaced, make sure there are no burns. (see page 77)

6. After all interventions, check the appliance is operating correctly using the diagnostic cycle. (page 9)

7. Delete any alarm that may have been stored during the diagnostics operations (page 15)

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2 WM APPLIANCE CONTROL PANELS

These are the stylings available at the time of printing of this Service Manual. Others may be developed in future.

TC 1

TC 2

THE INSPIRATION RANGE

TC 3

3 PROGRAMMING/UPDATING THE MAIN CIRCUIT BOARD

In the Service Notes the main circuit board (587) is identified with two spare parts codes:

ª Code 973 914… identifies the pre-programmed board. ª Code 132… identifies the unprogrammed board.

The circuit board can be programmed/updated using the Sidekick application. For further information, please refer to the instructions provided/illustrated in the course entitled << Guide to Sidekick >> at the address (http://electrolux.edvantage.net

In order to update / programme the main board, insert the Sidekick connector in the position indicated by the red arrow:

• For WASHING MACHINES, this is done directly from the

main board, see Fig.a.

) on the Electrolux Learning Gateway portal.

fig. a

587

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4 DIAGNOSTICS SYSTEM

4.1 Accessing diagnostics

The operations listed below must be carried out within 7 seconds.

TC 3 TC 2 TC 1

Do not start the procedure with your fingers over the combination sensors

1. Switch on the appliance using the ON/OFF button. The first LED lights up.

2. Simultaneously press the START/PAUSE button and the nearest option sensor (as shown in the diagram).

3. Hold your fingers over the sensors until the LEDs and symbols begin to flash in sequence (approximately 3 seconds).

In the first position, the operation of the sensors, the LEDs and the groups of symbols shown on the LCD display is checked;

For the TC3 and TC2 styling: When the programme selector is turned in a clockwise direction, the operation of the various components is diagnosed and the alarms are read (see diagnostic test on the next page).

For the TC1 styling: Since there is no selector with which to perform the diagnostics of the various components and the alarm reading, the two sensors shown in the figure below are used (the top one is used to move forward progressively and the bottom one to move backwards in the same way). Concurrently, the function performed is described in the text line (see diagnostic test on page 11).

Next Previous

During this phase, if any combination of sensors (except the one for diagnosis) is pressed, all the option combinations stored will be deleted (Extra rinse, Buzzer disable, etc.).

4.2 Quitting the diagnostics system

→ To exit the diagnostic cycle, switch the appliance off, then back on and then off again.

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4.3 Phases of the diagnostics test

4.3.1 TC3-TC2 styling

Irrespective of the type of PCB and the configuration of the programme selector, after entering the diagnostic mode, turn the programme selector dial clockwise to perform the diagnostic cycle for the operation of the various components and to read any alarms. Concurrently, a selector control code is shown on the LCD display, which indicates for two seconds the description in the last column of the table below. (all alarms are enabled in the diagnostic cycle).

Selector position

Components activated Working conditions Function tested LCD display

- The LEDs, groups of symbols in the LCD screen and the backlight of the display are turned on in sequence

- Touch a sensor to turn on the group of icons in the LCD screen or the corresponding

Always active

User interface functioning

LED and the buzzer sounds at the same time

Door closed

- Door safety interlock

- Wash solenoid valve

- Door safety interlock

- Pre-wash solenoid valve

- Door safety interlock

- Solenoid valve pre-wash

and wash

Water level below anti-flooding level Maximum time 5 mins.

Door closed Water level below anti-flooding level Maximum time 5 mins.

Water fill to wash compartment

Water fill to prewash compartment

Water fill to conditioner compartment

Water level in the tub (mm)

- Door safety interlock

- Third solenoid valve

- Door safety interlock

- Fourth solenoid valve

(hot water where featured)

- Door safety interlock

- Wash solenoid valve, if the

water in the tub is not enough to cover the heating element

- Heating element

- Weight sensor (if there is one,

an extra litre of water is loaded)

- Circulation pump

Door closed Water level below anti-flooding level Maximum time 5 mins.

Door closed Water level above the heating element Maximum time 10 mins up to 90°C (*)

Water fill to third solenoid valve compartment

Water fill to fourth solenoid valve compartment

Reheating Circulation

Water level in the tub is displayed (mm)

Temperature in °C measured using the NTC probe

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- Door safety interlock

- Wash solenoid valve, if the

water in the tub is not enough to cover the heating element

- Motor (55 rpm clockwise, 55 rpm anti-clockwise,

Door closed Water level above the heating element

Check for leaks from the tub

Drum speed in rpm/10

250 rpm pulse)

- Door safety interlock

- Drain pump

- Motor up to 650 rpm then at

maximum spin speed (**)

- Door safety interlock

- Drain pump

- Power fan

- Condensation solenoid valve

- Drying heating element

Door closed Water level lower than anti-boiling level for spinning

Door closed Water level below anti-boiling level Maximum time 10 minutes

Drain, calibration of analogue pressure switch and spin

Drying

Drum speed in rpm/10

Displays the air temperature alternating detection by the two NTC probes

- Reading/Deleting the last alarm ----- ----

- The LEDs, groups of symbols

in the LCD screen and the backlight of the display are

turned on in sequence

- Touch a sensor to turn on the group of icons in the LCD screen or the corresponding

Always active

User interface functioning

LED and the buzzer sounds at the same time

(*) In most cases, this time is sufficient to check the heating. H owever, the time can be increased by repeating the phase without draining the water: pass f or a moment to a different phase of the diagnostic cycle and then back to the heating control phase (if the temperatur e is higher than 80°C, heating does not take place). (**) The check at the maximum speed occurs without control of the A.G.S. and no garments must be inside the appliance.

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4.3.2 TC1 styling

Irrespective of the type of circuit board and the configuration of the programmes, after entering the diagnostic mode, touch the sensor to the left of the display (as shown in the figure) to perform the diagnostic cycle for the operation of the various components and to read any alarms. The LCD display shows the function checked in the middle (see third column) and at the top right, using the three digits:

¾ the water level in the tub, during the solenoid valve activation phases. ¾ the temperature in degrees °C, during the heating phases. ¾ the drum revolutions in rpm/10, during the phases when the motor is powered.

(all alarms are enabled in the diagnostic cycle)

Location Components activated Working conditions Function tested LCD display

- The LEDs are turned on in sequence, as are the symbol groups of the LCD display and

its backlight

- Touch a sensor to turn on the group of icons in the LCD

Always active

User interface functioning

screen or the corresponding LED and the buzzer sounds at the same time

- Door safety interlock

- Wash solenoid valve

- Door safety interlock

- Pre-wash solenoid valve

- Door safety interlock

- Solenoid valve

pre-wash and wash

- Door safety interlock

- Third solenoid valve

- Door safety interlock

- Fourth solenoid valve (hot water

where featured)

Door closed Water level below anti-flooding level Maximum time 5 mins.

Water fill to wash compartment

Water fill to pre-wash compartment

Water fill to conditioner compartment

Water fill to third solenoid valve compartment

Water fill to fourth solenoid valve compartment

- Door safety interlock

- Wash solenoid valve, if the water in the tub is not enough to cover the heating element

- Heating element

- Weight sensor (if there is one,

an extra litre of water is loaded)

Door closed Water level above the heating element Maximum time 10 mins up to 90°C (*)

Reheating Circulation

- Circulation pump

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- Door safety interlock

- Wash solenoid valve, if the

water in the tub is not enough to cover the heating element

- Motor (55 rpm clockwise,

Door closed Water level above the heating element

Check for leaks from the tub

55 rpm anti-clockwise, 250 rpm pulse)

- Door safety interlock

- Drain pump

- Motor up to 650 rpm then at

maximum spin speed (**)

Door closed Water level lower than anti-boiling level for spinning

Drain, calibration of analogue pressure switch and spin

----- ----- ----- -----

- Reading/Deleting the last alarm ----- ----

- The LEDs, groups of symbols in

the LCD screen and the backlight of the display are

turned on in sequence

- Touch a sensor to turn on the group of icons in the LCD screen

Always active

User interface functioning

or the corresponding LED and the buzzer sounds at the same time

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5 ALARMS

5.1 Displaying the alarms to the user

When a problem occurs in the appliance, the LCD display shows a “WARNING”:

− in stylings TC3 and TC2 with a code (in the three digits, where the time until the end of the cycle is represented).

− in styling TC1, a message is shown (in the text line).

This information ceases to be displayed when the problem is repaired/solved. The buzzer then emits a sound (three short “beeps”every 20” for 5 minutes). This does not occur for alarm EH0.

TC 3 TC 2

TC 1

The alarms displayed to the user are listed below and can also be eliminated by the user:

TC3 / TC2 TC1

E10 - Water fill difficulty (tap closed) Check the tap E20 - Drain difficulty (filter dirty) Check the drain filter E40 - Door open Check the door EF0 - Excessive detergent Excessive detergen EH0 - Voltage or frequency outside normal values Unstable frequency or voltage

While the alarm listed below:

TC3 / TC2 TC1

EF0 - Water leakage (Aqua Control System) Caution: water

The intervent ion of a service engineer is required.

The other alarms are displayed by a code.

The alarms are enabled during the execution of the washing programme. With the exception of alarms associated w ith the configuration and the power supply voltage/frequency, whic h ar e also displayed dur ing the programme selec tion phase.

The door can normally be opened (except where specified) when an alarm condition has occurred, on condition that:

• The level of the water in the tub is below a certain level.

• The water temperature is lower than 55°C.

• The motor has stopped.

Certain alarm conditions require a drain phase to be performed before the door can be opened for safety reasons:

• Cooling water fill if the temperature is greater than 65°C.

• Drain until the analogue pressure switch is on empty, during a max. 3 minute interval.

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5.2 Reading the alarms

The last three alarms stored in the FLASH memory of the PCB can be displayed:

5.2.1 TC3-TC2 styling

• Enter the diagnostic mode (para. 3.1).

• Irrespective of the type of PCB and configuration, turn the programme

selector knob clockwise to the eleventh position the last alarm is displayed.

• To display previous alarms, touch the sensor closest to the START/PAUSE

sensor in sequence (as shown in the figure).

• To return to the last alarm, touch the START/PAUSE sensor.

TC 3 TC 2

5.2.2 TC1 styling

• Enter the diagnostic mode (para. 3.1).

• Irrespective of the type of circuit board and configuration, using the sensor

shown in the figure, go to the eleventh position and the last alarm is displayed.

• To display previous alarms, touch the sensor closest to the START/PAUSE

sensor in sequence (as shown in the figure below).

• To return to the last alarm, touch the START/PAUSE sensor.

TC 1

5.3 Rapid reading of alarms

It is possible to display the last alarm even if the selector is not in the eleventh diagnostics position or if the appliance is in normal operating mode (for example when performing a wash programme): → Touch the START/PAUSE sensor and the nearest option sensor simultaneously (as if you were

entering DIAGNOSTIC mode) and hold for at least 2 seconds: the LCD display shows the last alarm.

 The alarm will continue to be displayed until a sensor is touched.  The alarm reading system is as described in para. 4.2.  While the alarm is being displayed, the appliance continues to perform the cycle or, if in the programme

selection phase, it stores the previously selected options.

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5.4 Deleting the last alarm

It is good practice to cancel the alarms stored:

• after reading the alarm codes, to check whether the alarm re-occurs during the diagnostic cycle

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

TC 3 TC 2

1. Enter the diagnostic mode (para. 3.1).

2. Turn the selector clockwise until the eleventh LED lights up.

3. Simultaneously press the START/PAUSE sensor and the nearest option sensor (as shown in the diagram).

4. Keep your fingers over the sensors until the LCD display shows “E00” (at least 5 seconds).

TC 1

Fig. a Fig. b

1. Enter the diagnostic mode (para. 3.1).

2. Irrespective of the type of circuit board and configuration, touch the sensor (shown in fig. a) to go to the eleventh position and the alarm is displayed.

3. Simultaneously press the START/PAUSE sensor and the nearest option sensor (as shown in fig. b).

4. Keep your fingers over the sensors until the LCD display shows “E00” (at least 5 seconds).

N.B. With this operation all the alarms stored are deleted.

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5.5 ALARM SUMMARY TABLE

Alarm Description Possible faul

E00

Tap closed or water pressure too low; drain pipe improperly

E11 Water fill difficulty during washing

E13 Water leaks

E21

E23

E24

E31

E32

E35

E38

E41

Drain difficulty during washing

Faulty triac for drain pump Wiring faulty; drain pump faulty; main PCB fault.

Drain pump triac “sensing” circuit faulty

Malfunction in electronic pressure switch circuit

Calibration error of the electronic pressure switch

Overflow

Internal pressure chamber is clogged (water level does not change for at least 30 sec. of drum rotation)

Door open

E42 Problems with door lock

E43

E44

E45

Faulty triac supplying power to door delay system

Faulty sensing by door delay system Main circuit board faulty.

Faulty sensing by door delay system triac

positioned; water fill solenoid valve faulty; leaks from water circuit on pressure switch; pressure switch faulty; wiring faulty; main PCB faulty. Drain pipe improperly positioned; water pressure too low Water fill solenoid valve faulty; water circuit on pressure switch is leaking/clogged; pressure switch faulty.

Drain pipe kinked/clogged/improperly positioned; drain filter clogged/dirty; wiring faulty; pressure switch faulty; drain pump rotor blocked; drain pump faulty; main PCB faulty.

Main circuit board faulty.

Wiring; Electronic pressure switch; Main PCB. Cycle stops with door locked RESET 28

Drain pipe kinked/clogged/improperly positioned; solenoid valve faulty; drain filter clogged/dirty; drain pump faulty; leaks from pressure switch hydraulic circuit; pressure switch faulty; Wiring; main PCB.

Water fill solenoid valve faulty; leaks from water circuit on pressure switch; wiring faulty; pressure switch faulty; main PCB faulty.

Motor belt broken; water circuit on pressure switch clogged. Heating phase is skipped RESET 31

Check whether the door is closed properly; Wiring faulty; door safety interlock faulty; Main circuit board faulty. Wiring faulty; door safety interlock faulty; Electrical current leak between heating element and ground; main PCB faulty. Wiring faulty; door safety interlock faulty; Main circuit board faulty.

Main circuit board faulty.

Machine status/action Rese

Cycle is paused with door locked START/RESET 20

Cycle is paused with door locked START/RESET 22

Cycle is paused

(after 2 attempts)

Safety drain cycle - Cycle stops with

door open

Safety drain cycle - Cycle stops with

door unlocked

Cycle is paused START/RESET 29

Cycle interrupted. Safety drain cycle.

Drain pump continues to operate (5 min.

on, then 5 min. off. etc.)

Cycle is paused START/RESET 32

Cycle is paused START/RESET 34

(Safety drain cycle)

Cycle blocked

(Safety drain cycle)

Cycle blocked

(Safety drain cycle)

Cycle blocked

START

ON/OFF

RESET

RESET 26

RESET 28

RESET 30

RESET 36

RESET 37

Page

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Alarm Description Possible faul

E52

E57

E58

E59

E5A

No signal from motor tachometric generator Inverter is drawing too much current (

>15 A)

Inverter is drawing too much current (

>4.5 A)

No signal from tachometric generator for 3 seconds

Overheating on heat dissipator for Inverter

E5C Input voltage is too high

E5d

E5E

E5F

E5H

E62

E66

Data transfer error between Inverter and main PCB Communication error between Inverter and main PCB

Inverter PCB fails to start the motor Wiring faulty; Inverter PCB faulty; Main PCB faulty.

Input voltage is lower than 175 V Wiring faulty; Inverter PCB faulty.

Overheating during washing (temperature higher than 88°C for more than 5 min.) Heating element power relay faulty (inconsistency between sensing and K2 relay status)

Wiring faulty; Motor faulty; Inverter board faulty.

Wiring faulty on inverter for motor; inverter PCB faulty; motor faulty.

Motor malfunction (overload); Wiring faulty on inverter faulty; motor faulty; inverter PCB faulty.

Wiring faulty on inverter for motor; inverter PCB faulty; motor faulty.

Overheating caused by continuous operation or ambient conditions (let appliance cool down); Inverter PCB faulty. NTC open (on the Inverter PCB). Input voltage is too high (m easure the grid voltage); Inverter PCB faulty.

Line interference; wiring faulty; faulty main PCB or inverter PCB. ----------------

Faulty wiring between main PCB and inverter PCB; Inverter PCB faulty; Main PCB faulty.

Wiring faulty; NTC probe for wash cycle faulty; Heating element faulty; Main PCB faulty.

Main PCB faulty.

Machine status/action Rese

Cycle stops with door locked

(after 5 attempts)

Cycle stops with door locked

(after 5 attempts)

Cycle stops with door locked

(after 5 attempts)

Cycle stops with door locked

(after 5 attempts)

Cycle stops with door locked

(after 5 attempts)

Cycle stops with door locked

(after 5 attempts)

Cycle blocked

(after 5 attempts)

Cycle stops with door open

(after 5 attempts)

Cycle stops with door locked

(after 5 attempts)

Safety drain cycle

Cycle stops with door open

Safety water fill

Cycle stops with door closed.

Page

ON/OFF

RESET

ON/OFF

RESET

ON/OFF

RESET

ON/OFF

RESET

ON/OFF

RESET

ON/OFF

RESET

ON/OFF

RESET

ON/OFF

RESET

ON/OFF

RESET

ON/OFF

RESET

RESET 53

ON/OFF

RESET

38/40

E68 Current leak to the ground Current leakage between heating element and ground. The heating phase is skipped START/RESET 55

START

ON/OFF

RESET

ON/OFF

RESET

E69 Heating element interrupted

E6A

E6H

E71

E74

E83

Heating relay sensing faulty Main circuit board faulty. Cycle stops with door locked RESET 57 Heating element power relay faulty

(inconsistency between sensing and K1 relay status)

NTC probe forwash cycle faulty (short-circuited or open) NTC probe for wash cycle improperly positioned

Error in reading selector Main PCB faulty (Incorrect configuration data). Cycle cancelled START/RESET 60

Wiring faulty; Heating element for washing interrupted (thermal fuse open); Main PCB faulty.

Wiring faulty; Earth-leakage between heating element and earth; Main PCB faulty.

Wiring faulty; NTC probe for wash cycle faulty;. Main circuit board faulty. Wiring faulty; NTC probe for wash cycle improperly positioned; NTC probe faulty; Main PCB faulty.

----------------

Safety water fill

Cycle stops with door closed.

The heating phase is skipped START/RESET 58

The heating phase is skipped RESET 59

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Guide to diagnostics of electronic controls EWM10931

Alarm Description Possible faul

E86 Selector configuration error Display board. ----------------

E87

E91

E92

E93

E94

E97

E98

E9C

E9E

EC1

EC2

EC3

EF1

EF2

EF3

EF4

EF5

Display board microprocessor faulty If this continues, replace the display board. No action to be taken

Communication error between main PCB and display Communication inconsistency between main PCB and display (incompatible versions)

Appliance configuration error Main PCB faulty (incorrect configuration data). Cycle blocked ON/OFF 62 Incorrect configuration of washing

cycle Inconsistency between programme selector and cycle configuration Communication error between main PCB - Inverter

Display board configuration error Display board faulty. ----------------

Display board sensor/touch key faulty

Electronically controlled valve blocked with operating flowmeter

Data transfer error between Weight sensor and main PCB. Problems with weight sensor (no signal or outside the limits)

Drain filter clogged (drain phase too long) Overdosing of detergent (too much foam during drain phases)

Aqua control system intervention Water leaks onto base frame; Aqua control system faulty. Appliance drains ON/OFF RESET 67 Water fill pressure too low, no signal

from flowmeter and electronically controlled valve is open

Unbalanced load Final spin phases skipped. ---------------- START/RESET 67

Wiring faulty; Control/display PCB faulty; Main circuit board faulty; Inverter PCB faulty; Weight sensor faulty.

Incorrect control/display PCB; Incorrect PCB (does not correspond to the model).

Main PCB faulty (incorrect configuration data). Cycle blocked ON/OFF 62

Main PCB faulty (incorrect configuration data). Cycle blocked RESET 62

Incompatibility between main PCB and Inverter. Cycle blocked ON/OFF 62

Display board faulty. ---------------- ON/OFF 63

Wiring faulty; Solenoid valve faulty/blocked, Main PCB faulty.

Wiring faulty; Weight sensor faulty, PCB faulty. No action to be taken START/RESET 65

Wiring faulty; Weight sensor faulty; Main PCB faulty. ---------------- START/RESET 66

Drain filter clogged/dirty; Drain hose blocked/kinked/too high. Excessive detergent dosing; Drain hose kinked/blocked; Drain filter clogged/dirty.

Tap closed, water fill pressure too low. ---------------- RESET 67

Drain pump continues to operate (5 min.

Machine status/action Rese

START

ON/OFF

RESET START

ON/OFF

RESET

---------------- RESET 61

Cycle blocked ON/OFF 62

START

ON/OFF

RESET

Cycle stops with door locked

RESET 64

on, then 5 min. off. etc.)

Warning displayed at the end of cycle START/RESET 67

Warning displayed after 5 attempts or

by the specific LED

RESET 67

Page

EF6 Reset If it continues, replace the main board. No action to be taken ---------------- 68

EH1

Supply frequency of appliance outside the limits

Problem with the power supply network (incorrect/disturbed); Main PCB faulty.

Wait for nominal frequency conditions ON/OFF 68

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Guide to diagnostics of electronic controls EWM10931

Alarm Description Possible faul

EH2

Supply voltage too high

EH3 Supply voltage too low

EH4

EHE

EHF

0 Watt relay malfunction Main circuit board faulty. ----------------

Inconsistency between FCV relay (in the main board) and safety “sensing” circuit Safety sensing circuit faulty (wrong input voltage to microprocessor)

Problem with the power supply network (incorrect/disturbed); Main PCB faulty. Problem with the power supply network (incorrect/disturbed); Main PCB faulty.

Faulty wiring; Main circuit board faulty.

Main circuit board faulty.

Machine status/action Rese

Wait for nominal voltage conditions ON/OFF 68

Wait for nominal voltage conditions ON/OFF 69

ON/OFF

RESET

Safety drain cycle

Cycle stops with door open

Safety drain cycle

Cycle stops with door open

RESET 69

Page

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Guide to diagnostics of electronic controls EWM10931

5.6 Notes on the behaviour of certain alarms

 Configuration alarm E93: when this alarm rings (when turned on) the machine blocks and the alarm code appears on the display provided the relevant

configuration part is intact.

It will not be possible to access diagnostics mode and the only available option is to turn the appliance off.

 Configuration alarm E94: and the code can be viewed from the display. The diagnostics mode cannot be accessed and the “quick alarm viewing” mode cannot be used.

 Alarms EH1-EH2-EH3: in the event of problems with the supply voltage, the appliance remains in alarm status until the mains frequency or voltage returns to

acceptable values or the appliance is switched off (ON/OFF button). Only the “H” alarm family is displayed if the problem occurs while the appliance is working normally, the code is shown simultaneously on the display.

The diagnostics mode cannot be accessed and the “quick alarm viewing” mode cannot be used: the alarm can only be read in full when the situation has

normalised.

 Alarms E51- E52: all the alarms are displayed during diagnostic testing: normally, when shifting from one control phase to another, the appliance quits the

alarm mode and executes the selected phase. This is not the case for alarms E51 (motor power supply TRIAC short-circuiting) and E52 (no signal from motor tachometric generator): the only possibility to exit the alarm situation is to rotate the programme switch to the “0” position (reset) for the TC2 and TC3 stylings, while for the TC1 styling press the ON/OFF button.

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Guide to diagnostics of electronic controls EWM10931

6 CANNOT ACCESS THE DIAGNOSTICS PROGRAMME

6.1 None of the LEDs on the circuit board light up

Are the power supply cable and the connection

on the main board (connector J1) working

Is the communication wiring between the main

board (connector J4) and the display board

(connectors J2 and J3) working properly? (insert

properly?

E S

and remove)

E S

Does the ON/OFF button function mechanically?

E S

Change the main circuit board.

Is the appliance working correctly?

E S

Run the diagnostics programme.

MAIN CIRCUIT

BOARD

GENERAL EARTHING

Replace/repair the power supply cable, check

the connection.

Replace/repair wiring.

Replace/repair the button or replace the display

board.

Replace display board.

DISPLAY BOARD

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Guide to diagnostics of electronic controls EWM10931

7 TROUBLESHOOTING BASED ON ALARM CODES

E11: Water fill difficulty during washing

E11

Checks to perform:

Is one or are all the solenoid valves not

Is the resistance measurement of the solenoid

valve approximately 3.5÷4.5 KΩ? (Measure it

directly on the solenoid valve without wiring)

Reconnect the connector and measure

approximately 3.5÷4.5 KΩ on the solenoid valve

wiring connector on the circuit board side

Between J8-1 and J8-3 third solenoid valve

Replace the main circuit board and repeat the

diagnostic cycle to check for any further alarms.

correctly and not causing the siphon

Is the pressure switch's water circuit

Replace the main circuit board and repeat the diagnostic cycle to check for any further alarms.

(fig. 4): Between J7-1 and J7-3 wash

Between J7-4 and J7-6 pre-wash

Between J8-4 and J8-6 hot water

Is the solenoid valve wiring ok?

Maximum water fill time for every level of the pressure switch

(the time is reset every time the level is achieved)

Check that all the connectors ar e correctly inserted

Run the diagnostic cycle and fill all the trays with water (phases 2,3,4,5,6).

Are all the trays filling with water?

E S

Is the drain tube positioned

effect? (fig. 1)

E S

Is the washing machine's water

circuit efficient (leaking)?

E S

Repair the drain circuit and repeat the

diagnostic cycle to check for any further alarms.

Repair the water circuit and repeat the

diagnostic cycle to check for any further alarms.

Repair the water circuit of the pressure switch

efficient (leaking/clogged)?

(fig. 2)

E S

and repeat the diagnostic cycle to check for

any further alarms.

Check whether the tap is open, if the water

pressure is too low and make sure the tubes are

working?

E S

connected and not kinked.

Replace the solenoid valve and repeat the

diagnostic cycle to check for any further alarms.

-(see fig. 3)-

E S

Replace/repair the wiring and repeat the

diagnostic cycle to check for any further alarms.

If there are burns on the circuit board,

E11

see page 77

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Guide to diagnostics of electronic controls EWM10931

E11

Fig. 1

J16 J13

J15

J10

Fig. 4

If there are burns on the circuit board,

see page 77

3.5÷4.5 K

WASHING

PRE-

WASHING

3rd

SOLENOID

ALVE

HOT

WATER

J11 J4 J8

J12

3.5÷4.5 K

J7 J6

Fig. 3

MAIN CIRCUIT

BOARD

Fig. 2

Fig.

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Guide to diagnostics of electronic controls EWM10931

E13: Water leaks

E13

Checks to perform:

approximately 3.5÷4.5 KΩ on the solenoid valve

diagnostic cycle to check for any further alarms.

Maximum overall water fill time exceeded (sum of all water fills between one drain phase

and the next to avoid exceeding the maximum volume).

Run the diagnostic cycle and fill all the trays with water (phases 2,3,4,5,6).

Are all the trays filling with water?

Is the drain tube positioned

correctly and not causing the siphon

effect? (fig. 1)

E S

Is the washing machine's water

circuit efficient (leaking)?

E S

Is the pressure switch's water circuit

efficient (leaking/clogged)?

(fig. 2)

E S

Replace the main circuit board and repeat the diagnostic cycle to check for any further alarms.

Is one or are all the solenoid valves not

working?

E S

Is the resistance measurement of the solenoid

valve approximately 3.5÷4.5 KΩ? (Measure it

directly on the solenoid valve without wiring)

-(see fig. 3)-

E S

Reconnect the connector and measure

wiring connector on the circuit board side

(fig. 4): Between J7-1 and J7-3 wash

Between J7-4 and J7-6 pre-wash

Between J8-1 and J8-3 third solenoid valve

Between J8-4 and J8-6 hot water

Is the solenoid valve wiring ok?

E S

Replace the main circuit board and repeat the

Check that all the connectors ar e correctly inserted

Repair the drain circuit and repeat the

diagnostic cycle to check for any further alarms.

Repair the water circuit and repeat the

diagnostic cycle to check for any further alarms.

Repair the water circuit of the pressure switch

and repeat the diagnostic cycle to check for

any further alarms.

Check whether the tap is open, if the water

pressure is too low and make sure the tubes are

connected and not kinked.

Replace the solenoid valve and repeat the

diagnostic cycle to check for any further alarms.

Replace/repair the wiring and repeat the

diagnostic cycle to check for any further alarms.

E13

If there are burns on the circuit board,

2012 TS/DT-mdm FCPD-dp 24/79 599 75 27-46 Rev.00

see page 77

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