Electrolux EWM09312 Service Manual
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Electrolux EWM09312 Service Manual

Electrolux EWM09312 Service Manual

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

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  • Page 1 SERVICE MANUAL WASH © ELECTROLUX HOME PRODUCTS Top loading washing Customer Care - EMEA machines Publication Training and Operations Support number Technical Support guide to diagnostics of 599 74 23-12 electronic controls EWM09312 Edition: 04/2011 - Rev. 00...
  • Page 2 Technical Support - A.D.L. 2/70 599 74 23-12 Rev.00...

  • Page 3: Table Of Contents

    TROUBLESHOOTING BASED ON ALARM CODES ..................26 OPERATING CIRCUIT DIAGRAM WM WITH AQUA CONTROL ..............65 Key to circuit diagram WM ........................66 Main circuit board connectors ......................... 67 Burns on the main circuit board EWM09312 ..................68 Revisions: ................................69 Technical Support - A.D.L. 3/70...

  • Page 4: Introduction

    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.

  • Page 5: How To Proceed

    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.

  • Page 6: Wm Appliance Control Panels

    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. SERIES SERIES Technical Support - A.D.L. 6/70 599 74 23-12 Rev.00...

  • Page 7: Diagnostics System

    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.

  • Page 8: Diagnostic Test Phases

    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.
  • Page 9 Position 3 Water fill to pre-wash Purpose of the test: To check the correct operation of the pre-wash compartment compartment water route. • Door safety interlock Components activated: • Pre-wash solenoid • Door closed Working conditions: • Water level below anti-flooding level •...
  • Page 10 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. • Door fastening device. Components activated: • Wash solenoid, if the water in the tub is not enough to cover the heating element.
  • Page 11 Position 9 Drain, calibration of Purpose of the test: To check the correct operation of the spin cycle analogue pressure drain pump and calibrate the analogue pressure switch and spin. switch. • Door safety interlock Components activated: • Drain pump •...

  • Page 12: Alarms

    ALARMS 4.1 Displaying user alarms When a problem arises in the appliance, which generates a “WARNING” or an “ALARM”, this is displayed with three digits, where normally the remaining cycle time is represented. The alarms displayed to the user are listed below: E10 - Water fill difficulty (tap closed) E20 - Drain difficulty (filter dirty) E40 - Door open...

  • Page 13: Reading The Alarms

    Reading the alarms The last three alarms stored in the FLASH memory of the circuit board can be displayed: • Enter the diagnostic mode. • Irrespective of the type of circuit board and configuration, turn the programme selector knob clockwise to the eleventh position and this will display the last alarm.

  • Page 14: Rapid Reading Of Alarms

    Rapid reading of alarms The last three alarms can even be displayed if the selector is not in the eleventh diagnostic position or if the appliance is in normal operating mode (for example when performing a wash programme): • Press the START/PAUSE button and the nearest option button simultaneously (as if you were entering DIAGNOSTIC mode) for at least 2 seconds: the LCD display shows the last alarm.

  • Page 15: Alarm Summary Table

    4.5 Alarm Summary Table Description Possible fault Machine status/action Reset • Tap closed. • Water pressure too low. • Drain pipe improperly positioned. • Water fill solenoid valve faulty. Water fill difficulty during washing Cycle is paused with door locked START/RESET •...
  • Page 16 Action Description Possible fault Reset Machine status • Wiring; Electronic pressure switch. Malfunction in electronic pressure Cycle stops with door locked RESET switch circuit • Main electronic circuit board. • Drain tube kinked/clogged/improperly positioned. • Solenoid valve faulty. • Drain filter clogged/dirty. Calibration error of the electronic •...
  • Page 17 Action Description Possible fault Reset Machine status • Check whether the door is closed properly • Faulty wiring. CLOSE THE Door open Cycle paused • Door safety interlock faulty DOOR • Main circuit board faulty. • Faulty wiring. • Door safety interlock faulty. Problems with door lock Cycle paused START/RESET...
  • Page 18 Action Description Possible fault Reset Machine status • Faulty wiring. • NTC probe for wash cycle faulty. Insufficient heating during the The heating phase is skipped START/RESET • Heating element faulty. washing phase • Main circuit board faulty. • Faulty wiring. Overheating during washing •...
  • Page 19 Action Description Possible fault Reset Machine status • Faulty wiring. NTC probe for wash cycle faulty • NTC probe for wash cycle faulty. The heating phase is skipped START/RESET (short-circuited or open) • Main circuit board faulty. • Faulty wiring. •...
  • Page 20 Action Description Possible fault Reset Machine status • Faulty wiring. Communication error between • Control/display circuit board faulty. ---------------- RESET main PCB and display board • Main circuit board faulty. Communication inconsistency • Incorrect control/display board. between main PCB and display Cycle blocked ON/OFF •...
  • Page 21 Action Description Possible fault Reset Machine status • Drain filter clogged/dirty. Drain filter clogged Warning displayed at the end of cycle. START/RESET • Drain hose blocked/kinked/too high. (drain phase too long) • Excessive detergent dosing. Overdosing of detergent Warning displayed after 5 attempts or by the (too much foam during drain •...

  • Page 22: Notes On The Behaviour Of Certain Alarms

    4.6 Notes on the behaviour of certain alarms Configuration alarm E93: when this alarm is detected (on switching on the appliance), the appliance stops, the LEDs in the START/PAUSE button start to flash, displaying the complete code (family plus alarm), the display shows the alarm code 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.

  • Page 23: Operating Time Counter

    OPERATING TIME COUNTER Using a specific procedure, the operator can display the total operating time for the appliance, which is counted from the moment it is first switched on. The unit can count up to a maximum of 6,550 hours of operating time. only the operating time of normal programmes (and not diagnostic cycles) is counted the actual operating time for the cycle is counted (which does not include pauses, delayed start time, rinse hold time and soaking phases)

  • Page 24: Display Of Total Operating Time

    5.2 Display of total operating time This time is displayed with a sequence of two digits at a time: the first two digits indicate thousands and hundreds, the second two digits indicate tens and units. For example, if the operating time is 6,550 hours, the display will show the following sequence: Phase 1 →...

  • Page 25: Cannot Access The Diagnostics Programme

    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 Replace/repair the power supply cable, check No → on the main board (connector J4) the connection. working properly? Yes ↓...

  • Page 26: Troubleshooting Based On Alarm Codes

    TROUBLESHOOTING BASED ON ALARM CODES E11: Water fill difficulty during washing 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 are correctly inserted Run the diagnostic cycle and fill all the trays with water (phases 2,3,4) Are all the trays filling with water? Is the drain pipe positioned...
  • Page 27 Fig. 1 Fig. 4 MAIN CIRCUIT BOARD Fig. 2 3.5÷4.5KΩ 3.5÷4.5KΩ 1) Solenoid valve for Pre-wash 2) Solenoid valve for Wash Fig.3 3.5÷4.5KΩ If there are burns on the circuit board, see page 68 Technical Support - A.D.L. 27/70 599 74 23-12 Rev.00...
  • Page 28 E13: Water leaks Maximum overall water fill time exceeded (sum of all water fills between one drain phase and the next to avoid exceeding the maximum volume) Check that all the connectors are correctly inserted Run the diagnostic cycle and fill all the trays with water(phases 2,3,4) Are all the trays filling with water? Is the drain pipe positioned Repair the drain circuit and repeat the...
  • Page 29 Fig. 1 Fig. 4 MAIN CIRCUIT BOARD Fig. 2 3.5÷4.5KΩ 3.5÷4.5KΩ 1) Solenoid valve for Pre-wash 2) Solenoid valve for Wash Fig.3 3.5÷4.5KΩ If there are burns on the circuit board, see page 68 Technical Support - A.D.L. 29/70 599 74 23-12 Rev.00...
  • Page 30 E21: Drain difficulty Maximum drain time exceeded (measured for every cycle phase) Check that all the connectors are correctly inserted Clean the filter and repeat the diagnostic cycle Is the drain filter clean? to check for any further alarms. Is the drain system ok? Disconnect and check the drain system (drain pipe and water system of the home) and repeat the diagnostic cycle to check...
  • Page 31 Fig. 1 Fig. 5 Fig. 4 MAIN CIRCUIT BOARD 155÷200Ω Drain pump 155÷200Ω If there are burns on the circuit board, see page 68 Technical Support - A.D.L. 31/70 599 74 23-12 Rev.00...
  • Page 32 E23: Problems with the component (Triac) controlling the drain pump Check that all the connectors are correctly inserted Is the resistance Is the resistance measurement of the pump measurement of the pump Replace the pump and repeat approximately 155÷182 Ω? Ω? the diagnostic cycle to check approximately...
  • Page 33 Fig. 4 Fig. 5 MAIN CIRCUIT Fig. 6 BOARD 155÷182Ω ∞ Ω Drain pump 155÷182Ω If there are burns on the circuit board, see page 68 Technical Support - A.D.L. 33/70 599 74 23-12 Rev.00...
  • Page 34 E24: Sensing circuit of the component (Triac) controlling the drain pump faulty Check that all the connectors are correctly inserted Replace the circuit board and repeat the diagnostic cycle to check for any further alarms. If there are burns on the circuit board, see page 68 E31: The analogue pressure switch provides the main circuit board with a signal outside the limits...
  • Page 35 E32: The analogue pressure switch causes an error during calibration (At the start of every cycle, the appliance drains to empty the tub and creates a level 0 to check the calibration of the analogue pressure switch Check that all the connectors are correctly inserted Drain the water from the tub.
  • Page 36 E35: Water level too high The main circuit board measures a water level, using the electronic pressure switch, of more than 300 mm for longer than 15 secs. Check that all the connectors are correctly inserted Drain the water from the tub. Are the pressure switch tube and Clean/change the tube and/or the pressure chamber unobstructed?
  • Page 37 E38: Internal pressure chamber is clogged The analogue pressure switch is not able to measure any variation in the water level for at least 30 secs during drum rotation. Check that all the connectors are correctly inserted Clean the internal Drain the water from pressure chamber Run the diagnostic...
  • Page 38 E41: Door open (device with 3 connections) Maximum time exceeded (PTC = 15 seconds) Close the door correctly and Is the door closed repeat the diagnostic cycle to correctly? check for any further alarms. Fig. 9 Replace the door Detach the connectors and To check the wiring, with the door lock and repeat measure on the component...
  • Page 39 E41 (device with 3 connections) Fig. 4 Fig. 9 MAIN CIRCUIT BOARD ∞ Ω Door Lock Ω traditional with flange n Ω ∞ Ω If there are burns on the circuit board, see page 68 Technical Support - A.D.L. 39/70 599 74 23-12 Rev.00...
  • Page 40 E42: Problems opening door Maximum time exceeded (255 seconds) Check that all the connectors are correctly inserted Close the door correctly and Is the door closed repeat the diagnostic cycle to correctly? check for any further alarms. Fig. 9 Replace the Detach the connectors and To check the wiring, with the door door lock and...
  • Page 41 E42 (device with 3 connections) Fig. 4 Fig. 9 MAIN CIRCUIT BOARD ∞ Ω Door Lock Ω traditional with flange n Ω ∞ Ω If there are burns on the circuit board, see page 68 Technical Support - A.D.L. 41/70 599 74 23-12 Rev.00...
  • Page 42 E43: Problems with the component (Triac) controlling the door delay system (device with 3 connections) Check that all the connectors are correctly inserted Detach the connectors and To check the wiring, with the measure on the component door open, measure on the (Fig.
  • Page 43 E44: Door closed "sensing" circuit faulty Check that all the connectors are correctly inserted Replace the circuit board and repeat the diagnostic cycle to check for any further alarms. E45: Problems with the "sensing" circuit of the component (Triac) controlling the door delay system Check that all the connectors are correctly inserted Replace the circuit board and repeat the diagnostic cycle to check for any further alarms.
  • Page 44 E51: Motor power TRIAC short-circuited Activation of the protection system for the Triac short-circuit (after 5 attempts separated by a 5-minute pause, during the cycle, immediately if recognised at the start of the cycle or during diagnostics) Check that all the connectors are correctly inserted E52 is probably Measure between all the Reconnect connector J11 to the...
  • Page 45 E52: No signal from motor tachometric generator (first part) Cycle interrupted after 5 attempts during the cycle, immediately if recognised at the start of the cycle or during diagnostics. Check that all the connectors are correctly inserted Access phase 7 of the diagnostic cycle (The drum rotates at Does the motor run...
  • Page 46 Fig. 10 Fig. 6 Fig. 4 General earthing connection MAIN CIRCUIT BOARD Ω Ω ∞ Ω ∞ Ω Fig.12 Fig. 11 If there are burns on the circuit board, see page 68 Technical Support - A.D.L. 46/70 599 74 23-12 Rev.00...
  • Page 47 E52: No signal from motor tachometric generator (second part) Cycle interrupted after 5 attempts during the cycle, immediately if recognised at the start of the cycle or during diagnostics. Check that all the connectors are correctly inserted The motor never runs Replace the motor and To check the wiring, measure Check the motor as...
  • Page 48 How to check collector motors P = motor protector 1) Check the connection blocks (wiring) and for the R = rotor S = stator presence of any protruding/kinked terminals. T = tachometric generator 2) Check for the presence of any marks / residue / water or detergent deposits on the motor and where these come from.
  • Page 49 E53: Problems with the "sensing" circuit of the component (Triac) powering the motor Check that all the connectors are correctly inserted Replace the circuit board and repeat the diagnostic cycle to check for any further alarms. If there are burns on the circuit board, see page 68 Technical Support - A.D.L.
  • Page 50 E54: Motor relay contacts sticking Voltage value on the motor circuit even when the same should not be operating Check that all the connectors are correctly inserted Measure between all the terminals of the Replace the circuit board and repeat the wiring connector J11-1 ÷...
  • Page 51 E62: Overheating during washing The temperature of the NTC probe exceeds 88°C for more than 5 mins. Check that all the connectors are correctly inserted Run the diagnostic cycle Replace the heating Detach the connector and and fill with water up to the element and repeat the measure between the heating door level to make sure the...
  • Page 52 E66: Heating element power supply relay faulty Check that all the connectors are correctly inserted Replace the circuit board and repeat the Measure between the connector J6-1/J6-2 of diagnostic cycle to check for any further the main circuit board and the appliance body. alarms.
  • Page 53 E68: Washing heating element leakage Check that all the connectors are correctly inserted Run the diagnostic cycle Detach the connector Run phase 8 of the and fill with water up to the and measure between diagnostic cycle, drain water door level to make sure the the heating element from the tub.
  • Page 54 E69: Washing heating element damaged Check that all the connectors are correctly inserted Measure the resistance Measure the resistance value directly on the value of the heating terminals of the heating element (Ω) between Replace the heating element terminals J6-1 ÷ J6-2 of the element and repeat the (detach the connectors) wiring connector...
  • Page 55 E6A: Heating relay sensing faulty Check that all the connectors are correctly inserted Replace the circuit board and repeat the diagnostic cycle to check for any further alarms. If there are burns on the circuit board, see page 68 E6H: Heating element power relay faulty (incongruence between sensing and relay status) Run the diagnostic cycle and fill with water up to the...
  • Page 56 E71: Washing NTC probe faulty Voltage value out of range (short-circuit or open circuit) Check that all the connectors are correctly inserted Detach the connector Run phase 6 of the diagnostic cycle Run phase 8 of the and measure directly and wait for the water to fill.
  • Page 57 E74: NTC probe improperly positioned Reposition the probe in its seat and Is the probe visibly positioned correctly in repeat the diagnostic cycle to check for its seat? any further alarms. -See Fig.17- Measure the value of the NTC probe Replace the washing heating element (5.7÷6.3KΩ...
  • Page 58 E83: Error reading the programme selector code Selector position code not envisaged by the configuration data or configuration error Turn the appliance on, turn the programme selector to Repeat the diagnostic every setting: wait at least cycle to check for any 10 seconds on each of the further alarms.
  • Page 59 E91: Communication error between the display board and the main circuit board Inconsistency between configuration values on starting the appliance Check the wiring between the main circuit board and the display board: Replace / repair the wiring and repeat the ►...
  • Page 60 E92: protocol incongruence Inconsistency between configuration values on starting the appliance Check that all the connectors are correctly inserted Incorrect configuration possible. Replace the circuit board and repeat the diagnostic cycle to check for any further alarms. E93: Appliance configuration error Inconsistency between configuration values on starting the appliance Check that all the connectors are correctly inserted Incorrect configuration possible.
  • Page 61 EC1: Water fill solenoid valves blocked The flowmeter has to fill water even with the solenoid valve not piloted Check that all the connectors are correctly inserted Does the solenoid Does the Replace the main circuit board valve start filling with appliance fill with and repeat the diagnostic cycle to water as soon as the...
  • Page 62 EC4: AGS current sensor faulty error Spin speed reduced to safety speed of 150 rpm If there are burns on the circuit board, see page 68 Replace the main circuit board and run the diagnostic cycle to check for any further alarms. EF1: Drain hose blocked/kinked/too high;...
  • Page 63 EH1: Mains frequency incorrect Power supply frequency out of configured range Check that all the connectors are correctly inserted Important The appliance remains in alarm status until the mains frequency returns to the correct values or the appliance is switched off (programme selector set to “0”). Only the family of the alarm is displayed and the diagnostics mode cannot be accessed.
  • Page 64 EH3: Supply voltage too low Supply voltage value higher than the one configured Check that all the connectors are correctly inserted Important The appliance remains in alarm status until the mains voltage returns to the correct values or the appliance is switched off (programme selector set to “0”). Only the family of the alarm is displayed and the diagnostics mode cannot be accessed.

  • Page 65: Operating Circuit Diagram Wm With Aqua Control

    OPERATING CIRCUIT DIAGRAM WM WITH AQUA CONTROL Technical Support - A.D.L. 65/70 599 74 23-12 Rev.00...

  • Page 66: Key To Circuit Diagram Wm

    8.1 Key to circuit diagram WM Appliance electrical components PCB components Main electronic circuit board. DRAIN_YTY Drain pump Triac Door safety interlock. DOOR_TY Door interlock Triac Pressure switch. PWELT_TY Pre-wash solenoid Triac NTC (washing). WELV_TY Wash solenoid Triac Pre-wash solenoid MOTOR_TY Drum rotation motor Triac Wash solenoid...

  • Page 67: Main Circuit Board Connectors

    8.2 Main circuit board connectors Serial Interface: J7-1 Analogue pressure switch (+5V) J9-1 ASY_IN J7-2 Analogue pressure switch (GND) J9-2 ASY_OUT J7-3 Analogue pressure switch (signal) J9-3 +5V J7-4 NTC temperature probe J9-4 GND J7-5 NTC temperature probe Communication with display board: J10-1 Vee 12V J8-1 DSP (signal) J10-2 5V...

  • Page 68: Burns On The Main Circuit Board Ewm09312

    8.3 Burns on the main circuit board EWM09312 In the event of burns on the main circuit board, check whether the problem was caused by another electrical component (short-circuits, poor insulation, water leaks). Use the figures that follow to pinpoint the component which may have caused the problem, depending on the area of the burns.

  • Page 69: Revisions

    Revisions: Revision Date Description Written by Approved by - on 04/2011 Document creation A.D.L. A.D.L. – 04/2011 Technical Support - A.D.L. 69/70 599 74 23-12 Rev.00...
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