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SERVICE MANUAL WASHING Washing machines ELECTROLUX HOME PRODUCTS Publication Customer Care - EMEA guide to diagnostics of number Training and Operations Support electronic controls Technical Support EWM10931 599 75 38-88 THE INSPIRATION RANGE Edition: 05-2012 TC4 / TC3 G50XXL...
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Guide to diagnostics of electronic controls EWM10931 2/74 2012 TS-mdm FCPD-dp 599 75 38-88 Rev.00...
Guide to diagnostics of electronic controls EWM10931 Index INTRODUCTION............................5 Purpose of this manual ........................5 Cautions .............................. 5 How to proceed ........................... 6 WM APPLIANCE CONTROL PANELS...................... 7 PROGRAMMING/UPDATING THE MAIN CIRCUIT BOARD ..............7 DIAGNOSTICS SYSTEM .......................... 8 Accessing diagnostics ........................
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EHF: Safety sensing circuit faulty ......................68 WM OPERATING CIRCUIT DIAGRAM ....................69 Key to circuit diagram WM ........................ 70 Main circuit board connectors ......................71 Burns on the main circuit board EWM10931 ..................72 4/74 2012 TS-mdm FCPD-dp 599 75 38-88 Rev.00...
Guide to diagnostics of electronic controls EWM10931 1 INTRODUCTION 1.1 Purpose of this manual The purpose of this manual is to explain, simply and schematically, the steps a Technician must take when faced with the problems indicated by the various alarm codes on appliances with electronic control in the EWM10931 series.
Guide to diagnostics of electronic controls EWM10931 1.3 How to proceed 1. Identify the type of control in question (pag 7) and access the diagnostic cycle (see page 8) 2. Read the alarm stored (page 13) and consult the instructions regarding the “alarm codes”, page 14÷18...
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) on the Electrolux Learning Gateway portal. To update/program the main board, insert the Sidekick connector in the position shown by the red arrow: fig.
Guide to diagnostics of electronic controls EWM10931 4 DIAGNOSTICS SYSTEM 4.1 Accessing diagnostics The operations listed below must be carried out within 7 seconds. TC 3 Do not start the procedure with your fingers over the combination sensors 1. Switch on the appliance using the ON/OFF Set the selector dial to position 0 (zero).
Guide to diagnostics of electronic controls EWM10931 4.3 Phases of the diagnostics test 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.
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Guide to diagnostics of electronic controls EWM10931 Selector Components activated Working conditions Function tested LCD display position TC 3 Door closed Water level below Water fill to third - Door safety interlock anti-flooding level solenoid valve - Third solenoid valve...
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Guide to diagnostics of electronic controls EWM10931 Selector Components activated Working conditions Function tested LCD display position ----- ----- ----- ----- ----- TC 3 - Reading/Deleting the last alarm ----- ---- TC 4 TC 3 - The LEDs, groups of symbols...
Guide to diagnostics of electronic controls EWM10931 4.4 ALARMS 4.4.1 Displaying the alarms to the user When a problem arises with the appliance, “WARNING” appears on the LCD screen, represented by a code (three digits, indicating the time required for the cycle to end). At the same time the buzzer gives off three short “beeps”...
Guide to diagnostics of electronic controls EWM10931 4.4.2 Reading the alarms The last three alarms stored in the FLASH memory of the PCB can be displayed: enter the diagnostic mode (para. 4.1) Irrespective of the type of PCB and configuration, turn the programme selector knob clockwise to the eleventh position and the last alarm is displayed.
Guide to diagnostics of electronic controls EWM10931 4.5 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 Cycle is paused with door...
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Guide to diagnostics of electronic controls EWM10931 alarm Description Possible fault Machine status/action Reset Page Wiring faulty; Motor faulty; Cycle stops with door locked ON/OFF No signal from motor tachometric generator 38/40 Inverter board faulty; (after 5 attempts) RESET Wiring faulty on inverter for motor; inverter PCB faulty;...
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Guide to diagnostics of electronic controls EWM10931 alarm Description Possible fault Machine status/action Reset Page START Display board microprocessor faulty If this continues, replace the display board No action to be taken ON/OFF RESET Wiring faulty; control/display circuit board faulty, Inverter...
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Guide to diagnostics of electronic controls EWM10931 alarm Description Possible fault Machine status/action Reset Page Inconsistency between FCV relay (in the main board) and Safety drain cycle Faulty wiring; Main circuit board faulty RESET safety “sensing” circuit Cycle stops with door open...
Guide to diagnostics of electronic controls EWM10931 4.6 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.
Guide to diagnostics of electronic controls EWM10931 5 CANNOT ACCESS THE DIAGNOSTICS PROGRAMME 5.1 None of the LEDs on the circuit board light up Are the power supply cable and the connection on Replace/repair the power supply cable, check the...
Guide to diagnostics of electronic controls EWM10931 6 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)
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Guide to diagnostics of electronic controls EWM10931 Fig. 1 J16 J13 J15 Fig. 4 Fig. 2 If there are burns on the circuit board, see page 72 3.5÷4.5KΩ 3.5÷4.5KΩ WASHING PRE- WASHING Fig. 3 MAIN CIRCUIT BOARD 21/74 2012 TS-mdm FCPD-dp...
Guide to diagnostics of electronic controls EWM10931 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...
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Guide to diagnostics of electronic controls EWM10931 Fig. 1 J16 J13 J15 Fig. 4 Fig. 2 If there are burns on the circuit board, see page 72 3.5÷4.5KΩ 3.5÷4.5KΩ WASHING PRE- WASHING Fig. 3 MAIN CIRCUIT BOARD 23/74 2012 TS-mdm FCPD-dp...
Guide to diagnostics of electronic controls EWM10931 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 to check for any further alarms.
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Guide to diagnostics of electronic controls EWM10931 Fig. 1 J16 J13 J15 Fig. 4 Fig. 5 155÷200Ω Drain pump 155÷200Ω MAIN CIRCUIT BOARD If there are burns on the circuit board, see page 72 25/74 2012 TS-mdm FCPD-dp 599 75 38-88 Rev.00...
Guide to diagnostics of electronic controls EWM10931 E23: Problems with the component (triac) controlling the drain pump Checks to perform: 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÷200...
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Guide to diagnostics of electronic controls EWM10931 J16 J13 J15 Fig. 4 Fig. 6 Fig. 5 155÷200Ω Drain pump 155÷200Ω MAIN CIRCUIT BOARD Ω If there are burns on the circuit board, see page 72 27/74 2012 TS-mdm FCPD-dp 599 75 38-88 Rev.00...
Guide to diagnostics of electronic controls EWM10931 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 circuit board and repeat the diagnostic cycle to check for any further alarms.
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 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.
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 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...
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Guide to diagnostics of electronic controls EWM10931 (device with 4 connections) J16 J13 J15 Fig. 4 Fig. 9 Ω n Ω n Ω n Ω Door Lock Ω (Instantaneous) n Ω MAIN CIRCUIT BOARD If there are burns on the circuit board,...
Guide to diagnostics of electronic controls EWM10931 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 Disconnect the door lock To check the wiring, keep the door...
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Guide to diagnostics of electronic controls EWM10931 (device with 4 connections) J16 J13 J15 Fig. 4 Fig. 9 Ω n Ω n Ω n Ω Door Lock Ω (Instantaneous) n Ω MAIN CIRCUIT BOARD If there are burns on the circuit board,...
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 E44: Door closed “sensing” circuit 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. E45: Problems with the “sensing” circuit of the component (triac)
Guide to diagnostics of electronic controls EWM10931 E52: No signal from motor tachometric generator (1 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...
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Guide to diagnostics of electronic controls EWM10931 Fig. 12 Fig. 14 Fig. 13 Fig. 10 Fig. 11 Ω MOTOR CONTROL MOTOR Connector Motor XXXΩ If there are burns on the circuit board, see page 72 39/74 2012 TS-mdm FCPD-dp 599 75 38-88 Rev.00...
Guide to diagnostics of electronic controls EWM10931 E52: No signal from motor tachometric generator (2 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...
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Guide to diagnostics of electronic controls EWM10931 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.
Guide to diagnostics of electronic controls EWM10931 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 Replace the motor control board and...
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Guide to diagnostics of electronic controls EWM10931 Fig. 13 Fig. 14 Fig. 10 Ω Connector Motor MOTOR CONTROL MOTOR If there are burns on the circuit board, see page 72 43/74 2012 TS-mdm FCPD-dp 599 75 38-88 Rev.00...
Guide to diagnostics of electronic controls EWM10931 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.
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Guide to diagnostics of electronic controls EWM10931 Fig. 16 Fig. 15 Fig. 17 Fig. 13 If there are burns on the circuit board, If there are burns on the circuit board, see page 71 see page 72 Fig. 10 Fig. 10 Ω...
Guide to diagnostics of electronic controls EWM10931 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...
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Guide to diagnostics of electronic controls EWM10931 Fig. 12 Fig. 14 Fig. 11 Fig. 10 Fig. 13 Ω Connector Motor MOTOR CONTROL MOTOR If there are burns on the circuit board, see page 72 47/74 2012 TS-mdm FCPD-dp 599 75 38-88 Rev.00...
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 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)
Guide to diagnostics of electronic controls EWM10931 E5E: Communication error between Inverter board and main circuit board 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.
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 E66: Heating element power supply relay faulty (inconsistency between the sensing and the status of the K2 Relay) Checks to perform: check that all the connectors are correctly inserted Replace the circuit board and repeat...
Guide to diagnostics of electronic controls EWM10931 E68: Washing heating element leakage Checks to perform: check that all the connectors are correctly inserted Run the diagnostic cycle Run phase 9 of the Detach the connectors and fill with water up to the...
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 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,...
Guide to diagnostics of electronic controls EWM10931 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 Run phase 7 of the diagnostic cycle Run phase 9 of the Detach the connector and wait for the water to fill.
Guide to diagnostics of electronic controls EWM10931 E74: NTC probe 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 repeat the diagnostic cycle to check for its seat? any further alarms.
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 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 connector: J16 from the main board that connects the motor...
Guide to diagnostics of electronic controls EWM10931 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. 61 Check the wiring between the main circuit...
Guide to diagnostics of electronic controls EWM10931 E92: protocol inconsistency 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.
Guide to diagnostics of electronic controls EWM10931 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.
Guide to diagnostics of electronic controls EWM10931 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...
Guide to diagnostics of electronic controls EWM10931 EF1: Drain hose blocked/kinked/too high; drain filter clogged/dirty Checks to perform: check that all the connectors are correctly inserted This warning only appears at the end of the cycle. The appliance detected long drainage phases during the cycle.
Guide to diagnostics of electronic controls EWM10931 EF6: Reset appliance. Checks to perform: check that all the connectors are correctly inserted No action to be performed, if continues, replace the main circuit board EH1: Mains frequency incorrect Power supply frequency out of configured range...
Guide to diagnostics of electronic controls EWM10931 EH3: Supply voltage too low Supply voltage value higher than the one configured Checks to perform: 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”).
Guide to diagnostics of electronic controls EWM10931 7.3 Burns on the main circuit board EWM10931 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).