Some LEDs come on, on the display board ................... 26 TROUBLESHOOTING BASED ON ALARM CODES ..................27 WM OPERATING CIRCUIT DIAGRAM ......................75 Key to diagram ............................76 Main circuit board connectors ......................... 77 Burns on the main circuit board EWM10931 ..................78 A.D.L. 02/2011 3/79 599 74 02-06...
EWM10931 series, NEW COLLECTION SERIES 7/8 version. Depending on the appliance configuration, the alarms may be entirely or partially displayed to the user: the latter solution is usually adopted.
1.3 How to proceed 1. Identify the type of control in question (Page 6) and access the diagnostic cycle (see page 7) 2. Read the alarm stored (page 12) and consult the instructions regarding the “alarm codes”, (page 27) 3. Delete the alarms stored (page 13) 4.
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. SERIES SERIES A.D.L. 02/2011 6/79 599 74 02-06...
3 DIAGNOSTIC SYSTEM Accessing diagnostics Do not start the procedure with the combination buttons pressed Series 7 Series 8 Turn the appliance on at the ON/OFF switch and the first LED in the right-hand row turns on. Press the START/PAUSE button and the nearest option button simultaneously (as shown in the figure).
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.
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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. •...
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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. • Heating element. •...
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Position 10 Drum position Purpose of the test: To check the correct position of the drum via DSP. • Drum rotation motor. Components activated: • Door fastening device. • Drum position sensor DSP. • Door closed. Working conditions: LCD display: Position 11 Reading/Deleting the Purpose of the test:...
4 ALARMS Displaying the alarms to the user When a problem arises in the appliance, which generates a “WARNING” or an “ALARM”, this is displayed with three digits, where the time until the end of the cycle is represented. Series 7 Series 8 The alarms displayed to the user are listed below: E10 - Water fill difficulty (tap closed)
Rapid reading of alarms The last three alarms can even be displayed if the selector is not in the tenth 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.
5 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.
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 →...
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 Leaks from pressure switch water circuit. Pressure switch faulty.
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Guide to diagnostics of electronic controls EWM10931 Description Possible fault Machine status/action Reset Malfunction in electronic pressure Wiring; Electronic pressure switch. Cycle stops with door locked. RESET switch circuit Main electronic circuit board. Drain tube kinked/clogged/improperly positioned. Solenoid valve faulty.
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Guide to diagnostics of electronic controls EWM10931 Description Possible fault Machine status/action Reset Check whether the door is closed properly. Faulty wiring. CLOSE Door open Cycle paused. Door safety interlock faulty. THE DOOR Main circuit board faulty. Faulty wiring. Door safety interlock faulty.
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Guide to diagnostics of electronic controls EWM10931 Description Possible fault Machine status/action Reset Faulty wiring. No signal from motor tachometric ON/OFF Motor faulty. Cycle blocked with door locked after 5 attempts. generator RESET Inverter board faulty. Motor-inverter wiring faulty. Inverter is drawing too much ON/OFF Inverter board faulty.
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Guide to diagnostics of electronic controls EWM10931 Description Possible fault Machine status/action Reset Faulty wiring. Insufficient heating during the NTC probe for wash cycle faulty. The heating phase is skipped. START/RESET washing phase Heating element faulty. Main circuit board faulty.
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Guide to diagnostics of electronic controls EWM10931 Description Possible fault Machine status/action Reset 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.
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Guide to diagnostics of electronic controls EWM10931 Description Possible fault Machine status/action Reset Faulty wiring. Communication error between Control/display circuit board faulty. ---------------- RESET main PCB and display board Main circuit board faulty. Communication inconsistency between main PCB and display Incorrect control/display board.
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Guide to diagnostics of electronic controls EWM10931 Description Possible fault Action/machine status Reset DSP sensor faulty. Transmission belt broken. No drum position signal made. Drum positioning cycle cancelled START/RESET Main circuit board faulty. Faulty wiring. DSP sensor faulty. No signal from the DSP during Transmission belt broken.
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Guide to diagnostics of electronic controls EWM10931 Description Possible fault Machine status/action Reset Supply frequency of appliance Problem with the power supply network (incorrect/disturbed). Wait for nominal frequency conditions. ON/OFF outside the limits Main circuit board faulty. Problem with the power supply network (incorrect/disturbed).
Guide to diagnostics of electronic controls EWM10931 5.4 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.
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 Replace/repair the power supply cable, check on the main board (connector J1) the connection.
Guide to diagnostics of electronic controls EWM10931 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).
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Guide to diagnostics of electronic controls EWM10931 Fig. 1 Fig. 4 Fig. 2 If there are burns on the circuit board, see page 78 Fig. 3 3.5÷4.5 KΩ 3.5÷4.5 KΩ WASHING PRE- WASHING SOLENOID VALVE STEAM MAIN CIRCUIT BOARD WATER A.D.L.
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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 Run the diagnostic cycle and fill all the trays with water (phases 2,3,4,5,6).
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Guide to diagnostics of electronic controls EWM10931 Fig. 1 Fig. 4 Fig. 2 If there are burns on the circuit board, see page 78 Fig. 3 3.5÷4.5 KΩ 3.5÷4.5 KΩ WASHING PRE- WASHING SOLENOID VALVE STEAM MAIN CIRCUIT BOARD WATER A.D.L.
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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 Is the drain filter clean? to check for any further alarms.
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Guide to diagnostics of electronic controls EWM10931 Fig. 1 Fig. 4 Fig. 5 155÷200 Ω Drain pump 155÷200 Ω MAIN CIRCUIT BOARD If there are burns on the circuit board, see page 78 A.D.L. 02/2011 32/79 599 74 02-06...
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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 Replace the pump and repeat measurement of the pump approximately 155÷200 Ω?
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Guide to diagnostics of electronic controls EWM10931 Fig. 4 Fig. 6 Fig. 5 155÷200 Ω Drain pump 155÷200 Ω MAIN CIRCUIT BOARD ∞ Ω If there are burns on the circuit board, see page 78 A.D.L. 02/2011 34/79 599 74 02-06...
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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.
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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.
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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 sec. Checks to perform: Check that all the connectors are correctly inserted Drain the water from the tub.
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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 sec. during drum rotation. Checks to perform: Check that all the connectors are correctly inserted...
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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, measure, with...
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Guide to diagnostics of electronic controls EWM10931 (device with 4 connections) Fig. 4 Fig. 9 ∞ Ω n Ω n Ω Door Lock n Ω ∞ Ω (Instantaneous) n Ω MAIN CIRCUIT BOARD If there are burns on the circuit board, see page 78 A.D.L.
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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, measure, with...
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Guide to diagnostics of electronic controls EWM10931 (device with 4 connections) Fig. 4 Fig. 9 ∞ Ω n Ω n Ω Door Lock n Ω ∞ Ω (Instantaneous) n Ω MAIN CIRCUIT BOARD If there are burns on the circuit board, see page 78 A.D.L.
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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: Disconnect the door lock To check the wiring, measure, with...
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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)
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Guide to diagnostics of electronic controls EWM10931 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...
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Guide to diagnostics of electronic controls EWM10931 Fig. 12 Fig. 14 Fig. 13 Fig. 10 Fig. 11 ∞ Ω MOTOR CONTROL BOARD Connector Motor XXXΩ If there are burns on the circuit board, see page 78 A.D.L. 02/2011 46/79 599 74 02-06...
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Guide to diagnostics of electronic controls EWM10931 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...
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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 and where these come from.
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Guide to diagnostics of electronic controls EWM10931 E57: Inverter is drawing too much current (>16A) 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 BOARD If there are burns on the circuit board, see page 78 A.D.L. 02/2011 50/79 599 74 02-06...
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Guide to diagnostics of electronic controls EWM10931 E58: Inverter is drawing too much current (>4A) 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, see page 78 Fig. 10 ∞ Ω Connector Motor MOTOR CONTROL BOARD A.D.L. 02/2011 52/79 599 74 02-06...
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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 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 BOARD If there are burns on the circuit board, see page 78 A.D.L. 02/2011 54/79 599 74 02-06...
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Guide to diagnostics of electronic controls EWM10931 E5A: Overheating on heat dissipator for Inverter board 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...
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Guide to diagnostics of electronic controls EWM10931 E5C: The Inverter board input voltage is too high (greater than 430V) The voltage should stay above 430V for at least 5 sec. Checks to perform: Check that all the connectors are correctly inserted...
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Guide to diagnostics of electronic controls EWM10931 E5d: Data transfer error between Inverter PCB and main PCB 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)
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Guide to diagnostics of electronic controls EWM10931 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.
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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 sec. Checks to perform: Check that all the connectors are correctly inserted...
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Guide to diagnostics of electronic controls EWM10931 E62: Overheating during washing The temperature of the NTC probe exceeds 88°C for more than 5 min. Checks to perform: Check that all the connectors are correctly inserted Detach the connector and Run the diagnostic cycle...
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Guide to diagnostics of electronic controls EWM10931 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.
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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 Detach the connectors Run phase 9 of the and fill with water up to the...
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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 Replace the heating element (Ω) between...
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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,...
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Guide to diagnostics of electronic controls EWM10931 E71: 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.
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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.
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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...
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Guide to diagnostics of electronic controls EWM10931 E91: Communication error between the display board and the main circuit board Inconsistency between configuration values on starting the appliance. Checks to perform: Check that all the connectors are correctly inserted Check the wiring between the main circuit...
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Guide to diagnostics of electronic controls EWM10931 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.
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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.
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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 solenoid...
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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.
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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...
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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 EWM10931x 8.3 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). Use the figures that follow to pinpoint the component which may have caused the problem, depending on the area of the burns.