Guide to diagnostics of electronic controls EWM10931 Contents INTRODUCTION..........................5 Purpose of this manual ........................5 Warnings............................5 How to proceed ..........................5 WM APPLIANCE CONTROL PANELS ....................6 DIAGNOSTIC SYSTEM........................7 Accessing diagnostics ........................7 Quitting the diagnostics system ..................... 7 Diagnostic test phases........................
Page 4
EHF: Safety “sensing” circuit faulty....................69 WM OPERATING CIRCUIT DIAGRAM....................70 Key to circuit diagram WM ......................71 Main circuit board connectors ...................... 72 Burns on the main circuit board EWM10931 ................73 4/75 2011 SOE/DT-mdm FCPD-dp Quality tb 599 73 77-37...
EWM10931 series, NEW COLLECTION SERIES 7/8/9 version. Depending on the appliance configuration, the alarms may be entirely or partially displayed to the user: the latter solution is usually adopted.
Guide to diagnostics of electronic controls EWM10931 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 SERIES 6/75 2011 SOE/DT-mdm FCPD-dp Quality tb...
Guide to diagnostics of electronic controls EWM10931 3 DIAGNOSTIC SYSTEM 3.1 Accessing diagnostics All versions SERIES 7 SERIES 8 SERIES 9 Do not start the procedure with the combination buttons pressed 1. Turn the appliance on at the ON/OFF switch and the first LED in the right-hand row turns on.
Guide to diagnostics of electronic controls EWM10931 3.3 Diagnostic test phases 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 EWM10931 - Door safety interlock - Wash solenoid if the water level Door closed in the tub does not cover the Check for leaks Water level above heating element from the tub the heating element...
Guide to diagnostics of electronic controls EWM10931 4 ALARMS 4.1 Displaying the alarms to the user When a problem arises in the appliance, a “WARNING” or an “ALARM” is displayed with three digits, where the time until the end of the cycle is represented.
Guide to diagnostics of electronic controls EWM10931 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. 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.
Guide to diagnostics of electronic controls EWM10931 4.3 Rapid reading of alarms The last alarm 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): →...
Guide to diagnostics of electronic controls EWM10931 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.
Guide to diagnostics of electronic controls EWM10931 5.3 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 difficulty during washing Water fill solenoid valve faulty; Leaks from water circuit on pressure...
Page 15
Guide to diagnostics of electronic controls EWM10931 Alarm Description Possible fault Machine status/action Reset Page Faulty “Sensing” by door delay (Safety drain cycle) Main circuit board faulty. RESET system triac Cycle blocked No signal from motor tachometric Wiring faulty; Motor faulty;...
Page 16
Guide to diagnostics of electronic controls EWM10931 Alarm Description Possible fault Machine status/action Reset Page NTC probe for wash cycle Wiring faulty; NTC probe for wash cycle improperly positioned; NTC The heating phase is skipped RESET improperly positioned probe faulty; Main PCB faulty.
Page 17
Guide to diagnostics of electronic controls EWM10931 Alarm Description Possible fault Machine status/action Reset Page Water fill pressure too low, no signal from flowmeter and electronically Tap closed, water fill pressure too low. ---------------- RESET controlled valve is open Unbalanced load Final spin phases skipped.
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, on the main board (connector J1) No →...
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)
Page 21
Guide to diagnostics of electronic controls EWM10931 Max. 4 m Fig. 1 J16 J13 J15 Fig. 4 If there are burns on the circuit board, see page 73 Fig. 2 3.5÷4.5kΩ 3.5÷4.5kΩ WASHING PRE- WASH SOLENOID Fig. 3 VALVE MAIN CIRCUIT...
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...
Page 23
Guide to diagnostics of electronic controls EWM10931 Max. 4 m Fig. 1 J16 J13 J15 Fig. 4 If there are burns on the circuit board, see page 73 Fig. 2 3.5÷4.5kΩ 3.5÷4.5kΩ WASH PRE- WASH Fig. 3 MAIN CIRCUIT BOARD...
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.
Page 25
Guide to diagnostics of electronic controls EWM10931 Max. 4 m 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 73 25/75 2011 SOE/DT-mdm FCPD-dp Quality-tb...
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 Replace the pump and Is the resistance measurement of the pump...
Page 27
Guide to diagnostics of electronic controls EWM10931 J16 J13 J15 Fig. 4 Fig. 5 Fig. 6 155÷200Ω Drain pump 155÷200Ω MAIN CIRCUIT BOARD ∞ Ω If there are burns on the circuit board, see page 73 27/75 2011 SOE/DT-mdm FCPD-dp Quality-tb...
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 To check the wiring, measure, with Disconnect the door lock...
Page 33
Guide to diagnostics of electronic controls EWM10931 (device with 4 connections) J16 J13 J15 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...
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 To check the wiring, measure, with Disconnect the door lock...
Page 35
Guide to diagnostics of electronic controls EWM10931 (device with 4 connections) J16 J13 J15 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...
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, measure, with Disconnect the door lock...
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 (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 39
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 73 39/75 2011 SOE/DT-mdm FCPD-dp Quality-tb...
Guide to diagnostics of electronic controls EWM10931 E52: No signal from motor tachometric generator (second part) after 5 attempts during the cycle, immediately Cycle interrupted if recognised at the start of the cycle or during diagnostics. Checks to perform: Check that all the connectors are correctly inserted The motor never runs To check the wiring, measure (Ω)
Page 41
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...
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...
Page 43
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 73 43/75 2011 SOE/DT-mdm FCPD-dp Quality-tb 599 73 77-37...
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.
Page 45
Guide to diagnostics of electronic controls EWM10931 Fig. 15 Fig. 16 Fig. 17 Fig. 13 If there are burns on the circuit board, see page 73 Fig. 10 Ω ∞ Connector - Motor MOTOR CONTROL MOTOR 45/75 2011 SOE/DT-mdm FCPD-dp Quality-tb...
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...
Page 47
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 73 47/75 2011 SOE/DT-mdm FCPD-dp Quality-tb...
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 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 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 the main circuit board and the appliance body.
Guide to diagnostics of electronic controls EWM10931 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.
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 element (Ω) between...
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...
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 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 repeat the diagnostic cycle to check for correctly in 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 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...
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.
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 solenoid...
Guide to diagnostics of electronic controls EWM10931 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 Appliance ok. diagnostic cycle. Does the EC2 alarm...
Guide to diagnostics of electronic controls EWM10931 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 Appliance ok.
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 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.