Electrolux EWM09312 User manual

SERVICE MANUAL
WASH
Top loading washing
machines
guide to diagnostics of
electronic controls
EWM09312
©ELECTROLUX HOME PRODUCTS
Customer Care - EMEA
Training and Operations Support
Technical Support
Edition: 04/2011 - Rev. 00
Publication
number
599 74 23-12
EN

Technical Support - A.D.L. 2/70 599 74 23-12 Rev.00

Technical Support - A.D.L. 3/70 599 74 23-12 Rev.00
Contents
1INTRODUCTION..............................................................................................................................................4
1.1 Purpose of this manual .............................................................................................................................4
1.2 Warnings...................................................................................................................................................4
1.3 How to proceed.........................................................................................................................................5
2WM APPLIANCE CONTROL PANELS............................................................................................................6
3DIAGNOSTICS SYSTEM ................................................................................................................................7
3.1 Accessing diagnostics ..............................................................................................................................7
3.2 Quitting the diagnostics system................................................................................................................7
3.3 Diagnostic test phases..............................................................................................................................8
4ALARMS ........................................................................................................................................................12
4.1 Displaying user alarms ...........................................................................................................................12
4.2 Reading the alarms.................................................................................................................................13
4.3 Rapid reading of alarms..........................................................................................................................14
4.4 Deleting the last alarm ............................................................................................................................14
4.5 Alarm Summary Table ............................................................................................................................15
4.6 Notes on the behaviour of certain alarms...............................................................................................22
5OPERATING TIME COUNTER .....................................................................................................................23
5.1 Reading the operating time.....................................................................................................................23
5.2 Display of total operating time ................................................................................................................24
6CANNOT ACCESS THE DIAGNOSTICS PROGRAMME.............................................................................25
6.1 None of the LEDs on the circuit board light up.......................................................................................25
6.2 Some of the LEDs on the circuit board light up ......................................................................................25
7TROUBLESHOOTING BASED ON ALARM CODES....................................................................................26
8OPERATING CIRCUIT DIAGRAM WM WITH AQUA CONTROL.................................................................65
8.1 Key to circuit diagram WM......................................................................................................................66
8.2 Main circuit board connectors.................................................................................................................67
8.3 Burns on the main circuit board EWM09312 ..........................................................................................68
Revisions:..............................................................................................................................................................69

Technical Support - A.D.L. 4/70 599 74 23-12 Rev.00
1 INTRODUCTION
1.1 Purpose of this manual
The purpose of this manual is to explain, simply and schematically, the steps any Technician should take when
faced with the problems indicated by the various alarm codes on appliances with electronic control in the
EWM09312 New Collection series.
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 Warnings
Before starting work on a piece of equipment, check that the earth in the lodgings is working
properly by using an appropriate tool and follow the instructions described/illustrated on the
Electrolux Learning Gateway portal
http://electrolux.edvantage.net
When the work is finished check that the equipment's safety conditions have been reinstated, as
though it were straight off the assembly line.
In the event of handling/replacing the electronic circuit board, use the ESD (Cod. 405 50 63-95/4) kit
to avoid electrostatic discharges damaging the electronic circuit board - see S.B. No. 599 72 08-09.
Any work on electrical appliances must only be carried out by qualified technicians.
This platform is not fitted with an ON/OFF switch. Before you access internal components, take the
plug out of the socket to disconnect the power supply.
When replacing the heating element, replace it with one that has the same
characteristics (2 thermal fuses) to avoid compromising 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.
When replacing components, please refer to the code shown in the list of spare parts relating to the
appliance.

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1.3 How to proceed
1. Identify the type of control in question (page 2) and access the diagnostic cycle (see page 3).
2. Read the alarm stored (page 4) and consult the instructions regarding the “alarm codes”, (page 15).
3. Delete the alarms stored (page 14).
4. If you are unable to access the diagnostic mode, consult the chapter entitled “The diagnostics system
cannot be accessed” (page 25).
5. Should the main electronic circuit board need to be replaced, make sure there are no burns. (See page 68).
6. After all intervention, check the appliance is operating correctly using the diagnostic cycle (page 7).
7. Delete any alarm that may have been stored during the diagnostics operations (page 14).

Technical Support - A.D.L. 6/70 599 74 23-12 Rev.00
2 WM APPLIANCE CONTROL PANELS
Below are the styling versions available at the time of issuing of this Service Manual.
Series 6 with 14-position selector plus OFF position
Series 7 with 16-position hi fi selector without OFF position.
NEW COLLECTION
SERIES
6
SERIES
7

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3 DIAGNOSTICS SYSTEM
3.1 Accessing diagnostics
Do not start the procedure with the combination buttons pressed
Series 6 Series 7
Turn the appliance on at the
ON/OFF switch.
In series 7, the first LED in the
right-hand row lights up.
Only in series 6, turn the selector to
the first position on the right.
Press the START/PAUSE button
and the nearest option button
simultaneously (as shown in the
figure).
Hold the buttons/sensors
down/pressed until the LEDs and
symbols begin to flash in sequence
(approximately 3 seconds).
In the first position, the operation of the buttons, of the related LEDs and of the groups of symbols shown on the
LCD screen is checked; turn the programme selector dial clockwise to run the diagnostic cycle for the
operation of the various components and to read any alarms (see diagnostic test).
During this phase, if any key combination is pressed (except for the one relating to diagnostics), all the
combinations of options stored are deleted (Extra rinse, No buzzer, etc.) whereas for SERIES 9, the memories
with the customised programmes are also deleted.
3.2 Quitting the diagnostics system
To exit the diagnostic cycle, switch the appliance off, then back on and then off again.

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3.3 Diagnostic test phases
Irrespective of the type of circuit board and the configuration of the 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).
Position 1
User interface test Purpose of the test: To test operation of all the LEDs and switches.
Components activated: •The LEDs are turned on in sequence, as are the
symbol groups of the LCD display and its
backlight.
Behaviour: •All LEDs turn on in sequence.
•By pressing a key the corresponding icon unit
lights up.
•The code is shown on the LCD and a beep
sounds.
•All the icons on the LCD flash.
Working conditions: There is a control to run the test (always active).
LCD display
Position 2
Water fill to wash
compartment
Purpose of the test: To check the correct operation of the wash
compartment water route.
Components activated:
•
Door safety interlock
•Wash solenoid
Working conditions:
•
Door closed
•Water level below anti-flooding level
•Maximum time 5 mins.
LCD display
Water level in the tub is displayed (mm)

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Position 3
Water fill to pre-wash
compartment
Purpose of the test: To check the correct operation of the pre-wash
compartment water route.
Components activated:
•
Door safety interlock
•Pre-wash solenoid
Working conditions:
•
Door closed
•Water level below anti-flooding level
•Maximum time 5 mins.
LCD display
Water level in the tub is displayed (mm)
Position 4
Water fill to conditioner
compartment
Purpose of the test: To check the correct operation of the conditioner
compartment water route.
Components activated:
•
Door safety interlock
•Pre-wash and wash solenoid valves
Working conditions:
•
Door closed.
•Water level below anti-flooding level
•Maximum time 5 mins.
LCD display
Water level in the tub is displayed (mm)
Position 5
No command Purpose of the test: -------------
Components activated: -------------
Working conditions: -------------
LCD display

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Position 6
No command Purpose of the test: -------------
Components activated: -------------
Working conditions: -------------
LCD display
Position 7
Heating Purpose of the test: To check the correct operation of the heater unit.
Components activated:
•
Door fastening device.
•Wash solenoid, if the water in the tub is not
enough to cover the heating element.
•Heating element.
Working conditions:
•
Door closed
•Water level high enough to cover the heating
element.
•Maximum time 10 mins up to 90°C. (*)
LCD display
Temperature in °C measured using the
NTC probe.
Position 8
Leaks from the tub Purpose of the test: To check for any water leaks from the tub during
operation.
Components activated:
•
Door fastening device.
•Wash solenoid, if the water in the tub is not
enough to cover the heating element.
•Motor (anticlockwise rpm, pulse at 250 rpm).
Working conditions:
•
Door closed.
•Water level above
•The heating element.
LCD display
Drum speed in rpm/10