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Electrolux EWD10931 Service Manual

Electrolux EWD10931 Service Manual

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SERVICE MANUAL
WASHING
Washer dryers
ELECTROLUX HOME PRODUCTS
Publication
Customer Care - EMEA
guide to diagnostics of
number
Training and Operations Support
electronic controls
Technical Support
EWD10931
599 75 20-34
EN
NEW
COLLECTION
Edition: 04/2012 - Rev. 00
SERIES
7 / 8

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  • Page 1 SERVICE MANUAL WASHING Washer dryers ELECTROLUX HOME PRODUCTS Publication Customer Care - EMEA guide to diagnostics of number Training and Operations Support electronic controls Technical Support EWD10931 599 75 20-34 COLLECTION Edition: 04/2012 - Rev. 00 SERIES 7 / 8...
  • Page 2 Guide to diagnostics of electronic controls EWD10931 2/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 3: Table Of Contents

    Guide to diagnostics of electronic controls EWD10931 Index INTRODUCTION............................5 Purpose of this manual ........................5 Cautions ............................5 How to proceed ..........................6 WD APPLIANCE CONTROL PANELS ...................... 6 Programming/Updating the main circuit board ..................6 DIAGNOSTICS SYSTEM .......................... 7 Accessing diagnostics ........................
  • Page 4 Key to diagram ......................... 91 Main circuit board connectors ...................... 92 WD electronic satellite board connectors ..................93 Burns on the main circuit board EWD10931 ................94 Burning on the WD satellite electronic board ................95 4/97 2012 TS/DT-mdm FCPD-dp...

  • Page 5: Introduction

    Guide to diagnostics of electronic controls EWD10931 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 EWD10932 series, NEW COLLECTION SERIES 7/8 version.

  • Page 6: How To Proceed

    For further information please refer to the indications provided/illustrated in the course << Guide to Sidekick >> at the website (http://electrolux.edvantage.net) on the Electrolux Learning Gateway portal. In order to update / programme the main board, insert the Sidekick connector in the position indicated by...

  • Page 7: Diagnostics System

    Guide to diagnostics of electronic controls EWD10931 Fig. a Fig. b 4 DIAGNOSTICS SYSTEM 4.1 Accessing diagnostics All versions The operations listed below must be carried out within 7 seconds. SERIES 7 SERIES 8 Do not start the procedure with the combination buttons pressed 1.

  • Page 8: Phases Of The Diagnostics Test

    Guide to diagnostics of electronic controls EWD10931 4.3 Phases of the diagnostics test Irrespective of the type of electronic board and of the selector configuration, once the diagnostics system has been activated, turn the selector dial clockwise to run a check of the various components and read the alarms.
  • Page 9 Guide to diagnostics of electronic controls EWD10931 - Door safety interlock - Wash solenoid valve if the water level in the tub does not Door closed Check for leaks cover the heating element Water level above from the tub. - Motor (55 rpm clockwise,...

  • Page 10: Alarms

    Guide to diagnostics of electronic controls EWD10931 5 ALARMS 5.1 Displaying the alarms to the user When a problem occurs in the appliance and a “WARNING” or “ALARM” is triggered, this is shown in the three digit display (where the time left to the end of the cycle is shown), this information ceases to be displayed when the problem is repaired/solved.

  • Page 11: Reading The Alarms

    Guide to diagnostics of electronic controls EWD10931 5.2 Reading the alarms The last three alarms stored in the FLASH memory of the PCB can be displayed: 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.

  • Page 12: Alarm Summary Table

    Guide to diagnostics of electronic controls EWD10931 5.5 ALARM SUMMARY TABLE Alarm Description Possible fault Machine status/action Reset Page ------- --------------------------------- Tap closed or water pressure too low; drain pipe improperly positioned; water fill solenoid valve faulty; leaks from water circuit on...
  • Page 13 Guide to diagnostics of electronic controls EWD10931 Alarm Description Possible fault Machine status/action Reset Page Wiring faulty; door safety interlock faulty; Problems with door lock Electrical current leak between heating element and ground; Cycle is paused START/RESET main PCB faulty.
  • Page 14 Guide to diagnostics of electronic controls EWD10931 Alarm Description Possible fault Machine status/action Reset Page START Wiring faulty; Heating element for washing interrupted (thermal fuse Heating element interrupted ---------------- ON/OFF open); Main PCB faulty. RESET Heating relay sensing faulty Main circuit board faulty.
  • Page 15 Guide to diagnostics of electronic controls EWD10931 Alarm Description Possible fault Machine status/action Reset Page START Display board configuration error Display board faulty. ---------------- ON/OFF RESET Display board sensor/touch key Display board faulty. ---------------- ON/OFF faulty Cycle stops with door locked Electronically controlled valve Faulty cabling;...
  • Page 16 Guide to diagnostics of electronic controls EWD10931 Alarm Description Possible fault Machine status/action Reset Page START Drying heating elements disconnected; Wiring faulty; Drying heating Drying heating elements interrupted ---------------- ON/OFF elements interrupted. RESET START Current leak to the ground Earth leakage between drying heating elements and earth.

  • Page 17: Notes On The Behaviour Of Certain Alarms

    Guide to diagnostics of electronic controls EWD10931 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.

  • Page 18: Cannot Access The Diagnostics Programme

    Guide to diagnostics of electronic controls EWD10931 6 CANNOT ACCESS THE DIAGNOSTICS PROGRAMME 6.1 None of the LEDs on the circuit board light up Checks to perform: Check that all the connectors are correctly inserted Are the power supply cable and the connection...

  • Page 19: Some Leds Come On, On The Display Board

    Guide to diagnostics of electronic controls EWD10931 6.2 Some LEDs come on, on the display board Checks to perform: Check that all the connectors are correctly inserted Are the keys unobstructed through the control Sort out any mechanical problems panel slots and do they activate the various...

  • Page 20: Troubleshooting Based On Alarm Codes

    Guide to diagnostics of electronic controls EWD10931 7 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)
  • Page 21 Guide to diagnostics of electronic controls EWD10931 Fig. 1 J10 J20 J8 J7 Fig. 4 MAIN CIRCUIT BOARD 3.5÷4.5KΩ Fig. 2 3.5÷4.5KΩ WASHING PREWASH CONDENSATION HOT WATER Fig. 3 If there are burns on the circuit board, see page 94/95...

  • Page 22: E12: Water Fill Difficulty During Drying

    Guide to diagnostics of electronic controls EWD10931 E12: Water fill difficulty during drying In order to check if the condensation solenoid valve works, the appliance measures the increase in the level of water at the start of the drying phase.
  • Page 23 Guide to diagnostics of electronic controls EWD10931 MAIN CIRCUIT BOARD 3.5÷4.5KΩ 3.5÷4.5KΩ WASHING PREWASH CONDENSATION HOT WATER Fig. 26 Fig. 27 Water that flows from the condensation solenoid valve. 23/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 24: E13: Water Leaks

    Guide to diagnostics of electronic controls EWD10931 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) Checks to perform: Check that all the connectors are correctly inserted...
  • Page 25 Guide to diagnostics of electronic controls EWD10931 Fig. 1 Fig. 4 DISPLAY CIRCUIT BOARD Fig. 2 3.5÷4.5KΩ 3.5÷4.5KΩ WASHING PREWASH CONDENSATION HOT WATER Fig. 3 If there are burns on the circuit board, see page 94/95 25/97 2012 TS/DT-mdm FCPD-dp...

  • Page 26: E21: Drain Difficulty

    Guide to diagnostics of electronic controls EWD10931 E21: Drain difficulty Maximum drain time exceeded (measured for every cycle phase) Checks to perform: 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.
  • Page 27 Guide to diagnostics of electronic controls EWD10931 Fig. 1 Fig. 4 230÷270Ω 230÷270Ω MAIN CIRCUIT BOARD Drain pump If there are burns on the circuit board, see page 94/95 Fig. 5 27/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 28: E22: Water Drainage Difficulty During Drying

    Guide to diagnostics of electronic controls EWD10931 E22: Water drainage difficulty during drying Checks to perform: 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.
  • Page 29 Guide to diagnostics of electronic controls EWD10931 Fig. 1 Fig. 4 230÷270Ω 230÷270Ω MAIN CIRCUIT BOARD Drain pump Fig. 5 If there are burns on the circuit board, see page 94/95 29/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 30: E23: Problems With The Component (Triac) Controlling The Drain Pump

    Guide to diagnostics of electronic controls EWD10931 E23: Problems with the component (triac) controlling the drain pump Checks to perform: Check that all the connectors are correctly inserted Is the resistance Replace the pump and repeat Is the resistance measurement of the pump...
  • Page 31 Guide to diagnostics of electronic controls EWD10931 Fig. 1 Fig. 6 Fig. 5 230÷270Ω 230÷270Ω MAIN CIRCUIT BOARD Ω Drain pump If there are burns on the circuit board, see page 94/95 31/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 32: E24: Sensing Circuit Of The Component (Triac) Controlling The Drain Pump Faulty

    Guide to diagnostics of electronic controls EWD10931 E24: Sensing circuit of the component (triac) controlling the drain pump faulty Checks to perform: Check that all the connectors are correctly inserted Replace the main circuit board and repeat the diagnostic cycle to check for any further alarms.

  • Page 33: E32: The Analogue Pressure Switch Causes An Error During Calibration

    Guide to diagnostics of electronic controls EWD10931 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)

  • Page 34: E35: Water Level Too High

    Guide to diagnostics of electronic controls EWD10931 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. Checks to perform: Check that all the connectors are correctly inserted Drain the water from the tub.

  • Page 35: E38: Internal Pressure Chamber Is Clogged

    Guide to diagnostics of electronic controls EWD10931 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. Checks to perform: Check that all the connectors are correctly inserted...

  • Page 36: E41: Door Open (Device With 4 Connections)

    Guide to diagnostics of electronic controls EWD10931 E41: Door open (device with 4 connections) Maximum time exceeded (5 pulses per instant) Checks to perform: Check that all the connectors are correctly inserted Disconnect the door lock To check the wiring, keep the door...
  • Page 37 Guide to diagnostics of electronic controls EWD10931 (device with 4 connections) Fig. 4 Ω Ω Fig. 9 Ω MAIN CIRCUIT BOARD Door Lock (Instantaneous) n Ω n Ω Ω If there are burns on the circuit board, see page 94/95...

  • Page 38: E42: Problems Opening Door (Device With 4 Connections)

    Guide to diagnostics of electronic controls EWD10931 E42: Problems opening door (device with 4 connections) Maximum time exceeded (5 pulses per instant) Checks to perform: Check that all the connectors are correctly inserted To check the wiring, keep the door...
  • Page 39 Guide to diagnostics of electronic controls EWD10931 (device with 4 connections) Fig. 4 Ω Ω Fig. 9 Ω MAIN CIRCUIT BOARD Door Lock (Instantaneous) n Ω n Ω Ω If there are burns on the circuit board, see page 94/95...

  • Page 40: E43: Problems With The Component (Triac) Controlling The Door Delay System (Device With 4 Connections)

    Guide to diagnostics of electronic controls EWD10931 E43: Problems with the component (triac) controlling the door delay system (device with 4 connections) Check that all the connectors are correctly inserted Checks to perform: To check the wiring, keep the door...

  • Page 41: E44: Door Closed "Sensing" Circuit Faulty

    Guide to diagnostics of electronic controls EWD10931 E44: Door closed “sensing” circuit faulty Checks to perform: Check that all the connectors are correctly inserted Replace the main circuit board and repeat the diagnostic cycle to check for any further alarms.

  • Page 42: E52: No Signal From Motor Tachometric Generator (First Part)

    Guide to diagnostics of electronic controls EWD10931 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. Checks to perform: Check that all the connectors are correctly inserted...
  • Page 43 Guide to diagnostics of electronic controls EWD10931 Fig. 12 Fig. 14 Fig. 13 Fig. 10 Fig. 11 Ω MOTOR CONTROL BOARD Motor connector XXXΩ If there are burns on the circuit board, see page 94/95 43/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 44: E52: No Signal From Motor Tachometric Generator (Second Part)

    Guide to diagnostics of electronic controls EWD10931 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. Checks to perform: check that all the connectors are correctly inserted...
  • Page 45 Guide to diagnostics of electronic controls EWD10931 How to check three-phase motors S = stator 1) Check the connection blocks (wiring) T = tachometric generator and for the presence of any protruding/kinked terminals. 2) Check for the presence of any marks / residue / water or detergent deposits on the motor an where these come from.

  • Page 46: E57: Inverter Is Drawing More Than 16A Current

    Guide to diagnostics of electronic controls EWD10931 E57: Inverter is drawing more than 16A current Abnormal current absorption by Motor Checks to perform: Check that all the connectors are correctly inserted Measure between the terminals of wiring connector J2-5, J2-6, J2-7 (motor control...
  • Page 47 Guide to diagnostics of electronic controls EWD10931 Fig. 13 Fig. 14 Fig. 10 Ω Motor connector MOTOR CONTROL BOARD If there are burns on the circuit board, see page 94/95 47/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 48: E58: Inverter Is Drawing More Than 4A Current

    Guide to diagnostics of electronic controls EWD10931 E58: Inverter is drawing more than 4A current Abnormal current absorption by Motor Checks to perform: Check that all the connectors are correctly inserted Reduce the laundry load in the drum and Was the wash cycle performed with too restart the wash cycle.
  • Page 49 Guide to diagnostics of electronic controls EWD10931 Fig. 15 Fig. 16 Fig. 17 Fig. 13 Fig. 10 Ω Motor connector MOTOR CONTROL BOARD If there are burns on the circuit board, see page 94/95 49/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 50: E59: No Signal From The Tachometric Generator

    Guide to diagnostics of electronic controls EWD10931 E59: No signal from the tachometric generator The lack of signal should last at least 3 seconds Checks to perform: Check that all the connectors are correctly inserted Replace the Detach the connector from the...
  • Page 51 Guide to diagnostics of electronic controls EWD10931 Fig. 12 Fig. 14 Fig. 11 Fig. 10 Fig. 13 Ω Motor connector MOTOR CONTROL BOARD If there are burns on the circuit board, see page 94/95 51/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...

  • Page 52: E5A: Overheating On Inverter Board Heat Dissipator

    Guide to diagnostics of electronic controls EWD10931 E5A: Overheating on Inverter board heat dissipator The dissipator exceeds a temperature of 88°C Checks to perform: Check that all the connectors are correctly inserted Have continuous wash cycles been Leave pauses between one cycle and the...

  • Page 53: E5C: The Inverter Board Input Voltage Is Too High (Beyond 430V)

    Guide to diagnostics of electronic controls EWD10931 E5C: The Inverter board input voltage is too high (beyond 430V) The voltage should stay above 430V for at least 5 seconds Checks to perform: Check that all the connectors are correctly inserted...

  • Page 54: E5D: Data Transfer Error Between Inverter Board And Main Circuit Board

    Guide to diagnostics of electronic controls EWD10931 E5d: Data transfer error between Inverter board and main circuit board The lack of communication must last at least 2 sec. Checks to perform: Check that all the connectors are correctly inserted Are connectors J16 (main circuit board)

  • Page 55: E5E: Communication Error Between Inverter Pcb And Main Pcb

    Guide to diagnostics of electronic controls EWD10931 E5E: Communication error between Inverter PCB and main PCB Communication protocol between the two boards not aligned Checks to perform: Check that all the connectors are correctly inserted Replace the motor control board and repeat the diagnostic cycle to check for any further alarms.

  • Page 56: E5H: The Inverter Board Input Voltage Is Too Low (Less Than 175V)

    Guide to diagnostics of electronic controls EWD10931 E5H: The Inverter board input voltage is too low (less than 175V) The voltage should stay below 175V for at least 5 seconds Checks to perform: Check that all the connectors are correctly inserted...

  • Page 57: E61: Insufficient Heating During Washing

    Guide to diagnostics of electronic controls EWD10931 E61: Insufficient heating during washing Maximum heating time exceeded  SOMETIMES THE ALARM CAN BE CAUSED BY EXCESSIVELY LOW SUPPLY VOLTAGE! Checks to perform: Check that all the connectors are correctly inserted Measure the value of the NTC...

  • Page 58: E62: Overheating During Washing

    Guide to diagnostics of electronic controls EWD10931 E62: Overheating during washing The temperature of the NTC probe exceeds 88 C for more than 5 mins. Checks to perform: Check that all the connectors are correctly inserted Run the diagnostic cycle and...

  • Page 59: E66: Heating Element Power Supply Relay Faulty

    Guide to diagnostics of electronic controls EWD10931 E66: Heating element power supply relay faulty Checks to perform: Check that all the connectors are correctly inserted Replace the circuit board and repeat the Measure between the connector J3-1/J3-2 of diagnostic cycle to check for any further the main circuit board and the appliance body.

  • Page 60: E68: Washing Heating Element Leakage

    Guide to diagnostics of electronic controls EWD10931 E68: Washing heating element leakage Checks to perform: Check that all the connectors are correctly inserted Run phase 9 of the Run the diagnostic cycle Detach the connectors diagnostic cycle, drain water and fill with water up to the and measure between from the tub.

  • Page 61: E69: Washing Heating Element Damaged

    Guide to diagnostics of electronic controls EWD10931 E69: Washing heating element damaged Checks to perform: 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...

  • Page 62: E6A: Heating Relay Sensing Faulty

    Guide to diagnostics of electronic controls EWD10931 E6A: Heating relay sensing faulty Checks to perform: 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,...

  • Page 63: E71: Washing Ntc Probe Faulty

    Guide to diagnostics of electronic controls EWD10931 E71: Washing NTC probe faulty Voltage value out of range (short-circuit or open circuit) Checks to perform: Check that all the connectors are correctly inserted Detach the connector Run phase 7 of the diagnostic cycle...

  • Page 64: E72: Ntc Probe Defective Dryer (Outer Casing Condenser)

    Guide to diagnostics of electronic controls EWD10931 E72: NTC probe defective dryer (outer casing condenser) The NTC resistance measurement is beyond limits Checks to perform: Check that all the connectors are correctly inserted Disconnect the connector. Replace the probe Measure the NTC probe value...

  • Page 65: E73: Faulty Ntc Dryer Probe (On The Outlet)

    Guide to diagnostics of electronic controls EWD10931 E73: Faulty NTC dryer probe (on the outlet) The NTC resistance measurement is beyond limits Checks to perform: Check that all the connectors are correctly inserted Measure the NTC probe value Disconnect the connectors.

  • Page 66: E74: Ntc Probe For Wash Cycle Improperly Positioned

    Guide to diagnostics of electronic controls EWD10931 E74: NTC probe for wash cycle improperly positioned Checks to perform: Check that all the connectors are correctly inserted Reposition the probe in its seat and Is the probe visibly positioned correctly in...

  • Page 67: E83: Error Reading The Programme Selector Code

    Guide to diagnostics of electronic controls EWD10931 E83: Error reading the programme selector code Selector position code not envisaged by the configuration data or configuration error Checks to perform: Check that all the connectors are correctly inserted Turn the appliance on, turn...

  • Page 68: E91: Communication Error Between The Display Board And The Main Circuit Board

    Guide to diagnostics of electronic controls EWD10931 E91: Communication error between the display board and the main circuit board (1 part) Checks to perform: Check that all the connectors are correctly inserted Disconnect the connectors: J16 and J4 of the main board that respectively...
  • Page 69 Guide to diagnostics of electronic controls EWD10931 E91: Communication error between the display board and the main circuit board (2 part) Checks to perform: Check that all the connectors are correctly inserted Follow from pag. 68 Connect the J4 main circuit board wiring Check the wiring between the main circuit board and the weight sensor board.
  • Page 70 Guide to diagnostics of electronic controls EWD10931 E91: Communication error between the display board and the main circuit board (3 part) Checks to perform: Check that all the connectors are correctly inserted Follow from pag. 68 Check the wiring between the main circuit board and the WD board.
  • Page 71 Guide to diagnostics of electronic controls EWD10931 E92: protocol incongruence Inconsistency between configuration values on starting the appliance Checks to perform: 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.
  • Page 72 Guide to diagnostics of electronic controls EWD10931 E9C: Display board configuration error Checks to perform: 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.
  • Page 73 Guide to diagnostics of electronic controls EWD10931 EC1: Water fill solenoid valves blocked The flowmeter has to fill water even with the solenoid valve not piloted Checks to perform: Check that all the connectors are correctly inserted Does the Does the solenoid...
  • Page 74 Guide to diagnostics of electronic controls EWD10931 EC2: Problem with weight sensor Checks to perform: Check that all the connectors are correctly inserted Turn the appliance off and back on again, enter the diagnostic cycle. Appliance ok Does the EC2 alarm appear...
  • Page 75 Guide to diagnostics of electronic controls EWD10931 EC3: Problem with weight sensor No signal or outside the limits Checks to perform: Check that all the connectors are correctly inserted Turn the appliance off and back on again, enter the diagnostic cycle.
  • Page 76 Guide to diagnostics of electronic controls EWD10931 Ed1: Communication problems between the main circuit board and the WD board Checks to perform: Check that all the connectors are correctly inserted Faulty WD Satellite board. Replace the WD satellite board and repeat the diagnostic cycle to check for any further alarms...
  • Page 77 Guide to diagnostics of electronic controls EWD10931 Ed3: Sensing relay dryer 1 faulty Checks to perform: Check that all the connectors are correctly inserted Replace the WD satellite board and repeat the diagnostic cycle to check for any further alarms.
  • Page 78 Guide to diagnostics of electronic controls EWD10931 Ed5: Sensing relay drying 2 faulty Checks to perform: Check that all the connectors are correctly inserted Replace the WD circuit board and repeat the diagnostic cycle to check for any further alarms.
  • Page 79 Guide to diagnostics of electronic controls EWD10931 Ed7: Faulty thermostats Checks to perform: Check that all the connectors are correctly inserted Directly check between the C1 – C 2 and D1 – D2 terminals of the dei thermostats that the Replace the thermostat/s and repeat the contact heating element is 0Ω...
  • Page 80 Guide to diagnostics of electronic controls EWD10931 Ed8: No tachometric signal from power fan Checks to perform: Check that all the connectors are correctly inserted Check the efficiency of the power fan Replace the power fan and repeat the between the motor connector contacts by diagnostic cycle to check for any further measuring the values shown in Tab.
  • Page 81 Guide to diagnostics of electronic controls EWD10931 Ed9: Inconsistency between the power fan status and the piloting sensing signal Checks to perform: Check that all the connectors are correctly inserted Replace the WD circuit board and repeat the diagnostic cycle to check for any further alarms.
  • Page 82 Guide to diagnostics of electronic controls EWD10931 EdC: Drying heating elements interrupted Checks to perform: Check that all the connectors are correctly inserted Check the efficiency of the two drying heating element branches by measuring Replace the WD satellite board and repeat...
  • Page 83 Guide to diagnostics of electronic controls EWD10931 Fig. 39 Fig. 40 Fig. 41 127Ω ± 5% WD BOARD SATELLITE Drying heating element Safety thermostat 0Ω 63.5Ω ± 5% 63.5Ω ± 5% Automatic thermostat If there are burns on the circuit board,...
  • Page 84 Guide to diagnostics of electronic controls EWD10931 Edd: Current leak to the ground Checks to perform: Check that all the connectors are correctly inserted Measure the continuity between the J17 Replace the wiring and repeat the diagnostic connector (main circuit board) and J1 cycle to check for any further alarms.
  • Page 85 Guide to diagnostics of electronic controls EWD10931 Fig. 42 Fig. 43 Fig. 44 WD BOARD SATELLITE Drying Safety heating thermostat element 0Ω DISPLAY Ω CIRCUIT BOARD Ω Automatic thermostat Ω If there are burns on the circuit board, see page 94/95...
  • Page 86 Guide to diagnostics of electronic controls EWD10931 EdH: Faulty WD board microprocessor Checks to perform: Check that all the connectors are correctly inserted Replace the WD circuit board and repeat the diagnostic cycle to check for any further alarms. If there are burns on the circuit board, see page 94/95 EF1: Drain hose blocked/kinked/too high;...
  • Page 87 Guide to diagnostics of electronic controls EWD10931 EF4: Water fill pressure too low and solenoid valve open Checks to perform: Check that all the connectors are correctly inserted It is a warning that the water pressure is too low. If the water pressure is connect, check: the wiring of the flowmeter and the Flowmeter.
  • Page 88 Guide to diagnostics of electronic controls EWD10931 EH2: Supply voltage too high Supply voltage value higher than the one configured (for more than 10 seconds) Checks to perform: Check that all the connectors are correctly inserted Caution! 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”).
  • Page 89 Guide to diagnostics of electronic controls EWD10931 EHD: Safety sensing circuit faulty Input voltage microprocessor wrong Checks to perform: Check that all the connectors are correctly inserted Replace the main circuit board and repeat the diagnostic cycle to check for any further alarms.
  • Page 90 Guide to diagnostics of electronic controls EWD10931 8 DIAGRAMS 8.1 WD diagram with THREE-PHASE ASYNCHRONOUS MOTOR 90/97 2012 TS/DT-mdm FCPD-dp 599 75 20-34 Rev.00...
  • Page 91 Guide to diagnostics of electronic controls EWD10931 8.1.1 Key to diagram Appliance electrical components PCB components 1. Noise filter DRAIN_YTY Drain pump Triac 2. Main circuit board DOOR_TY Door interlock Triac 3. Door safety interlock (with micro-switch) DOOR_CLOSE_TY Door interlock Triac 3a.
  • Page 92 Guide to diagnostics of electronic controls EWD10931 8.2 Main circuit board connectors J3-1 heating element (Neutral Relay) MACS communication J10-1 Analogue pressure switch (+5V) J7-1 Wash solenoid valve (Triac) J3-2 heating element (Line Relay) J16-1 Vee 15V J10-2 Analogue pressure switch (GND)
  • Page 93 Guide to diagnostics of electronic controls EWD10931 8.3 WD electronic satellite board connectors MACS communication J1-1 Power supply WD Board (Neutral) J1-2 Power supply WD Board (Line) J9-1 Drying heating element (low) J9-2 Drying heating element (up) J9-3 Automatic Thermostat...
  • Page 94 Guide to diagnostics of electronic controls EWD10931 8.4 Burns on the main circuit board EWD10931 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).
  • Page 95 Guide to diagnostics of electronic controls EWD10931 8.5 Burning on the WD satellite electronic board WD SATELLITE BOARD 1. Power supply area 5. Fan motor area 2. Drying heating element area 6. MACS ISO (main board) 3. Drying NTC probe area (outlet) 7.
  • Page 96 Guide to diagnostics of electronic controls EWD10931 Remarks --------------------------------------------------------------------------------------------- --------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------- ------------------- ------------------------------------------------------------------------------------------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------------------- ------------------- ------------------------------------------------------------------------------------------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------------------- ------------------- ----------------------------------------------------------------------------------------------------------------------------- ------------------- ----------------------------------------------------------------------------------------------------------- ------------------------------------- ----------------------------------------------------------------------------------------------------------------------------- ------------------- ------------------------------------------------------------------------------------------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------------------- ------------------- ------------------------------------------------------------------------------------------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------------------- ------------------- -------------------------------------------------------------------------------------------------------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------------------- ----------------------- ----------------------------------------------------------------------------------------------------------------------------- ------------------- ----------------------------------------------------------------------------------------- ------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------- -------------------...
  • Page 97 Guide to diagnostics of electronic controls EWD10931 REVISION: Revision Date Description Author Approved by XX – 0X/201X 04/2012 Document Creation...

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