SERVICE MANUAL DISHWASHERS - M
Contents
1. 12 7 4 2 12 7 4 3 A tiflooding device EUER 12 7 4 4 Intervention of the anti overflow 11 12 7 5 Control of water fill phase tie den enl ire nei Eee 12 7 5 1 eire me EIE E 12 7 5 2 Dynamic fill 12 7 5 3 EST EI 8 hires nltro epe RR 12 7 6 Water fill titme o oes rnt et ose e REPE Re SERRE 13 7 6 1 Static Mil time eee ett beet aide ottenuti t ette 13 7 6 2 Dynamic 13 7 6 3 Power supply interruption during water sees ene 13 7 7 L vel stability during WASHING i io etre dio dip ne onm nel es edema opens 13 7 8 UEM 13 7 8 1 Control of the washing pump beh Lade adam red deed see ge d er aeui eese Pe doe ced 13 7 9 Heating iine te tette EN Lp d EN ette bu 13 7 10 Integrated detergent 14 PIN SCD AMI du trt dais dass eal 14 7 11 1 Siphon efect 14 7 12 JRGGeneration Syste Miar ee doe che te Em ees Yee o Pene Eee aca Y ee Pacco id 15 7 13 RESIN WASHING 42 iik tette ei hene enu 15 TAG Bl nding NE2. 23 13 TABLE OF PROGRAMMES 24 SOI TD 2005 2 PR 3 26 599 36 83 66 14 CHECKING THE EFFICIENCY OF THE COMPONENTS eee eem nennen 14 1 Measurement points on the board wiring enne 15 QUICK GUIDE TO THE SPECIAL FUNCTIONS SOI TD 2005 2 PR 4 26 599 36 83 66 1 Purpose of this manual The purpose of this manual is to provide service personnel who already have the basic knowledge necessary for repairing dishwashers with information on dishwashers equipped with the EDW503 electronic control system which are produced in the Solaro MI Italy factory The EDW503 control system consists of a main circuit board and a control display board Both boards are housed in a single plastic container It is used in some DIVA models This Manual describes e General characteristics e Control panel and programmes e Technical characteristics e Guide to diagnostics For more detailed information regarding the hydraulic circuits and the structural characteristics of the appliances refer to the Service Manual for presentation of the DIVA structure publication number 599 35 55 25 599 36 09 90 2 PRECAUTIONS Electrical appliances must be serviced only by qualified Service Engineers Always remove the plug from the power socket before touching internal components 3 GENERAL CHARACTERISTICS Power supply gt
3. PU To ron wires uu 180 8 auxiliary winding PS DRAIN MOTOR D1 lt gt C1 gt 180 Q 8 SOI TD 2005 2 PR 25 26 599 36 83 66 15 QUICK GUIDE TO THE SPECIAL FUNCTIONS The table below briefly describes how each of the special functions available to the user and to the Service Engineer can be used Seton Starting the Displaying of the L2 flashes The End of The End of cycle LED Pressing button S2 the no of flashes increases Regeneration 0 On Off flashes to indicate the PUTA n L2 flashes v new regeneration level s ee 232 s indicate the 24 uns 2 L3 on with level steady light for 3sec S2 before L3 flashes L3 flashes the End of i cycle LED is on to bressing S2 twice on buzzer activated off deactivated schol um L3 flashes is ing S2 twi uzz activated not activated 2 End of cycle LED Alarm flashes to indicate the Pressing button S2 for other 2 times the other 2 memorised alarms are i L2 flashes gt L2 flashes type of alarm displayed flashing reading and L3 and L4 on with stead light 4 from the fourth activation of button S2 the single components activate chec L3 is on 4 5 6 7 8 9 Toj S2 PS EV RR DD MV g L3 flashes S2 before L3 Cancel 50 On Off All LEDs and digits flash L2 flashes L4 switch L3 flashes for 30 sec It is advisable to cancel the alarms a
4. Connect the probes of the tester to the appropriate points on the connector Compare the ohmic reading with the theoretical value MAIN BOARD EDW 503 replaced in the incorrect position back to front the appliance will not function since the power Care should be taken relative to the position of connector 1 B2 if this connector is supply will be disconnected 14 1 Measurement points on the board wiring connectors PROBE LIST OF COMPONENTS CONTACTS CORRECT VALUES NOTES RR HEATING ELEMENT i connected in series TS SAFETY THERMOSTAT A1 lt gt 05 E nii 1 2100W PR LEVEL PRESSURE SWITCH Ds n of A1 ANTI FLOODING PRESSURE JNFNITE v EMPTY 1 2 SWITCH DTS Be gt loo FULL 1 3 IP DOOR MICROSWITCH C16 gt 0 0 Door closed DD DB INTEGRATED DISPENSER lt gt E3 gt 1 500 8 INFINITE with Rinse aid SB RINSE AID SENSOR G3 gt G4 gt 00 without Rinse aid INFINITE with salt SS SALT SENSOR G1 lt gt G2 gt 00 without salt 14850 5 at 25 C ST TEMPERATURE SENSOR H1 gt gt 1205 O 4 5 at 60 C ER REGENERATION SOLENOID C1 lt gt D9 gt 6 8 EC FILL SOLENOID 07 IT AA ANTI FLOODING DEVICE C1 instead of D11 gt 3 800 8 ee in series D3 gt 011 gt 500 8 start up winding PD WASHMOTOR eg
5. 2 10 2 Buzzer The buzzer is a device which generates acoustic signals to indicate the End of cycle and eventually an Alarm situation These signals can be excluded through a button combination 1 Press button SO to switch the appliance on V cancel any selected cycles pressing button S2 for at least 3sec the End of cycle LED flashes V if featured the Salt Rinse aid LEDs light up 2 Press and hold down button S2 the relative LED lights up until LED L2 starts flashing LED L3 lights up steadily V Salt Rinse aid LED if featured switch off 3 Press button S2 before LED L3 switches off LED L2 lights up LED L3 flashes 4 Wait till LED L2 switches off the End of cycle LED indicates if the function is activated or not 5 Press button S2 the End of cycle LED indicates the new function state SOI TD 2005 2 PR 19 26 599 36 83 66 11 SERVICE MODE With this procedure it is possible to access the Service Diagnostics System To activate the function 1 Press and hold down button S2 2 Press button SO to switch the appliance on LED L2 flashes LEDs L3 and L4 light up Once this mode is accessed it is possible to e read and cancel the alarms e control the operation of the various components of the appliance e Start the Service diagnostics mode 11 1 Reading the alarms and activating the individual components After accessing the diagnostics mode Wait till LEDs L3 and L4 switch off 2 Pre
6. Washing programme LEDs LD7 gt LD9 Indicator LEDs End of cycle always present SALT and RINSE AID 4 1 On Off button 0 All models feature this button and it is used to switch on and off the appliance the switching off does not cause the cancellation of the current programme When the appliance is switched on only the End of cycle LED is on and in case if featured the Salt and Rinse aid LEDs 4 2 Option selection button S1 The system used for selecting the wash programmes depends on the configuration of the model They can be the delayed start or the half load Switching off and on the dishwasher the chosen settings are cancelled 4 3 Programme selection button S2 The functions of the various buttons and LEDs depend exclusively on the software configuration of each appliance With button S2 it is possible to scroll down sequentially all the available programmes when the button is pressed the LED relative to the chosen programme lights When the button S2 is activated for the first time the last programme performed is shown This button has also a Reset function SOI TD 2005 2 PR 6 26 599 36 83 66 4 4 Options 4 4 1 1 2 load The 1 2 load option optimizes the washing cycle when only a small load is placed in the appliance When this button is pressed certain parameters of the selected washing cycle are modified V Exclusion of Pre wash if featured Reduction of th
7. 230V 50 Hz limits 187 254 V Total power absorption gt 2200W Resistance 2000W Mains water supply Pressure Min 5 80 N cm Capacity 9 12 place settings 45 60 cm Consumption prog BIO V Water gt ubt d4 Energy gt KWh 0 8 Duration of cycle 136 143 45 60 cm Controls ON OFF gt On Off function button Programme start gt button Start Reset Programme selection Byknob n 3 5 programmes Option selection 1 button Display Leds Washing system gt Continuous 2600 2800 rpm Water fill level control Pressure switch Software Water heating Heating element enclosed in tube 2000 W Temperature control gt Temperature sensor Drying systems gt Active Safety systems Alarms Total protection hydraulic Software SOI TD 2005 2 PR 5 26 599 36 83 66 4 CONTROL PANEL 65 BREVE FINECICLO ACCESO o SPENTO M MEZZO TOINTENSIVC 65 NORMALE 50 ECO 65 BREVE e FINE CICLO ACCESO O CARICO dz o X 0 BRILLANTANTE PINTENSIV G5 NORMALE 50 ECO ACCESO O0 0 SPENTO SELEZIONE PROGR TO INTENSI O BS NORM LE 50 ECO o 0 0 ACCESO SPENTO EEEo proce 50 On Off button always featured S1 Option selection button only on some models S2 Programme selection button sequence LD1 Option Led activated only on some models LD2 LD6
8. 7 6 Water fill time The opening of the solenoid valve has a pre set overall duration which is subdivided into the various sub phases of the fill 7 6 1 Static fill time T S max 90 seconds This is the maximum time within which the pressure switch must switch to FULL If the FULL signal is not received from the pressure switch within this time the electronic control system interrupts the washing cycle and the appliance enters alarm condition 1 0 7 6 2 Dynamic fill time T S x 3 This is the maximum time allowed for the entire fill phase within which the pressure switch signal must stabilize on FULL e f the pressure switch signal does not stabilize on FULL within this period T S 3 the electronic control system switches off the fill solenoid and the heating element if switched on and then allows the washing cycle to proceed until it is completed In this situation the alarm condition F 0 is not displayed to the user but may be accessed by the Service Engineer using a specific procedure e f during a 2600 rpm dynamic fill the pressure switch never closes on FULL during the initial 60 seconds the electronic control system interrupts the washing cycle and the appliance enters alarm condition 1 0 7 6 3 Power supply interruption during water fill If the water fill phase is interrupted by opening the door or due to a power failure the contents of the counters are stored in memory when the door is re close
9. is switched off the drain pump is deactivated 7 5 Control of water fill phase The quantity of water necessary to carry out the washing cycle is determined exclusively by the closure of the electrical contact of the pressure switch which changes from EMPTY to FULL This system ensures that if the pressure switch re opens on EMPTY further water is introduced until it returns to FULL The water fill phase consists of the following sub phases 7 5 1 Static fill With the motor switched off the fill solenoid valve is energized and water is introduced into the appliance until the pressure switch signal switches to FULL 7 5 2 Dynamic fill The dynamic fill is obtained by switching on the washing pump whose rotation causes the pressure switch to switch to EMPTY Subsequently the fill solenoid valve is energized and water is introduced until the switch returns to FULL The speed of rotation of the motor determines the quantity of water introduced since the electronic control system switches on the washing pump at a rotation speed of 2600 2800 rpm 7 5 3 Level stability control The hydraulic circuit operates with maximum efficiency when the pressure switch signal remains stable on FULL In practise the quantity of water circulating in the sump allows the motor to run without speed fluctuations caused by cavitation When the pressure switch signals FULL the fill solenoid valve switches SOI TD 2005 2 PR 12 26 599 36 83 66
10. the other actuators cycle interrupted The washing motor runs at maximum speed and the alarm is displayed Circuit board faulty SOI TD 2005 2 PR 17 26 599 36 83 66 No flashes Type of of end of Displayed EET cycle LED to the Description of the alarm condition Machine status Possible causes y user and beeps F Heating element faulty intervention of safety Heating Time out Ihe programme Sones thermostats open wiring faulty NTC sensor poor the check takes place every 3 minutes end without heating the washing ic n AE i60 6 no thermal contact insufficient water circulating in the the temperature must increase by a result will probably be f Qn certain amount at each step unsatisfactory tub washing pump faulty impeller stripped circuit P y board faulty The programme continues to the er end without heating the washing NTC sensor faulty wiring short circuited open i70 7 no NTC sensor short circuited or oper result will probably be circuit board faulty unsatisfactory 5 Communication error between the Machine inoperative no selection i80 8 dia microprocessor and the EEPROM possible board faulty The fault occurs when switching Circuit board faulty 190 9 no Problems with software configuration on no selection possible configuration software incorrect 150 11 no Problems wi
11. 4 Electrolux SERVICE MANUAL Distriparts DISHWASHERS TO INTENSIVO 65 NORMALE 50 ECO 65 BREVE gt FINECICLO ACCESO o e SPENTO BEEN stLEZIONE Proce oS sa MEZZO TO INTENSIVO 65 NORMALE 50 Geneve FINE CICLO ACCESO o o x BRILLANTANTE SPENTO oS su TO INTENSIVO 65 NORMALE 50 AMMOLLO Fine cicto ACCESO SPENTO E oeoo TO INTENSIVO 65 NORMALE 50 ECO 65 BREVE gt I FINECICLO ACCESO o o o 9 ox SPENTO BEEN SELEZIONE PROGR OS sae Dishwasher with electronic control EDW 503 ELECTROLUX HOME PRODUCTS Publication no Functionalities ITALY S p A Spares Operations ltaly DIVA 45 60 BIG Corso Lino Zanussi 30 33080 PORCIA PN ITALY 599 36 83 66 totally integrated Fax 39 0434 394096 EN 911639 911939 911689 911989 Edition 2005 02 Production ZM Solaro IT SOI TD 2005 2 PR 1 26 599 36 83 66 SOI TD 2005 2 PR 2 126 599 36 83 66 CONTENTS T oie 5 2 PRECAUTIONS T A X 5 3 GENERALE CHARACTERISTICS Litt bete gat de T beta PUR eser EAAS 5 4 teagan 6 4 1 ere dete decem 6 4 2 Option sel
12. 6 Non return valve 8 Salt Reservoir 17 Drain hose 9 Resin Reservoir 18 Anti flooding device SOI TD 2005 2 PR 9 26 599 36 83 66 7 7 1 ELECTRICAL COMPONENTS AND FUNCTIONS EDW503 Electronic control system The EDW503 control system consists of a main circuit board and a control display board Both boards are housed in a plastic container fig 1 The On Off function is performed by the button SO 7 1 4 Functions of the circuit board g ELECTRICAL LOADS MAIN CIRCUIT BOARD The circuit board receives signals relative to the cycle settings via the control display board The buttons and LEDs are also mounted on this board The board also powers all the electrical components solenoid valves washing pump detergent rinse aid dispenser drain pump heating element The board controls the temperature of the washing water via an NTC sensor The circuit board monitors the status of the pressure switch and the rinse aid salt sensors SOI TD 2005 2 PR 10 26 599 36 83 66 7 1 2 Memory in the control system Power Fail and machine status Configuration of the appliance Description of the cycle The main circuit board features an EEPROM memory external to the microprocessor which stores in memory data relative to the configuration description of the cycle cycle status in case of a power failure and any alarm conditions The configuration data entered in the factory usi
13. BLENDING function is activated the percentage of unsoftened water introduced into the dishwasher is 15 The BLENDING function is activated using the selector knob located inside the tub on the left side in the vicinity of the steam venting grille Position of selector pos 1 blending enabled c pos 2 blending disabled SOI TD 2005 2 PR 15 26 599 36 83 66 8 DRYING In these dishwashers the dishes are dried by means of a steam condensation process The drying system is based on the circulation of the hot air produced during the hot rinse in which the steam circulates inside the condenser of the fill tank The steam humid hot air produced during the hot rinse enters from below through the steam venting grille and circulates slowly inside the chamber of the fill tank where it condensates and then exits through the upper part SOI TD 2005 2 PR 16 26 599 36 83 66 9 ALARMS When an abnormal situation occurs that may interfere with machine functioning the main board activates a safety system which in most cases interrupts the washing cycle The last three alarm situations are stored in memory Using a special procedure service personnel can display all the alarms stored in memory The user is only shown four of the alarms in progress The END OF CYCLE LED flashes repeatedly 9 1 Table of alarm codes Description of the alarm condition Machine status Possible causes Water fill time out The pressure
14. VO oc ote etin teret eee ee eet e i raed 15 8 DRYING diee tee ie 16 9 ALARMS tel oie Suse teen aide igi an ie ne ai en 17 9 1 Table of alarm codes nr e d ed aati dis ce rd een 17 10 USER rin ee eden Lee a edat die e tre e Pee 19 10 1 Regeneration selection ace ert E ete de b den ht e elec e eae p i ee E M vt e ce 19 10 2 eter tees eset peel petat eoe or C EP ere D de do e eut 19 TT SERVICE vet a eee et aet Liter ERA ee end ora uei e eee Aides 20 11 1 Reading the alarms and activating the individual components 20 11 2 Cancelling alarm codes from memory test of LEDS sss eee 20 11 3 Functional testing Cycle ian teret i et dec eee ee er ute es bre ua ue pv agn 21 11 3 1 selecting the cycle ERE held ER EE Ali ER EE Hp d ned 21 11 3 2 CYCle phases coder e ter Econ hu ERR ches 4 Geshe tke eas 21 11 4 Exiting Service and User modes nude tm eee tee D as 21 T2 EEECTRIGALE EUNGTIONS etie de itu 22 12 1 Electrical circuit diagram cone eric e corre ee Le a erg ncs 22 12 2 Basic cireult diagratm eta Dana eer E Ec ee EET deer dtp cbe ie 23 12 2 1 Key 10 CIRCUIT diagram n tren per eek
15. ative LED lights up on display board 7 13 Resin washing Washing of the resins contained in the softening system is performed at the beginning of each washing cycle In practise the solution of salty water regeneration water remains deposited in the resin container from the end of the last completed cycle until the subsequent cycle If the regeneration level is set to 10 washing of the resins is performed once at the beginning of the washing cycle and then again immediately after the regeneration process performed at the end of the washing phase The regeneration sequence is as follows Drain 30 seconds Water fill to correct level Drain 10 seconds Water fill 15 seconds Complete drain 0ocoocm 7 14 Blending function This function is performed inside the fill tank during the water fill phase which depending on the position of the selector automatically blends the softened water with the unsoftened water present in the appliance In practice the softened water is introduced into the appliance through the softening system while the unsoftened water flows via an open by pass duct directly through the steam venting ring If the level of regeneration is set to between 1 and 4 it is advisable to activate the BLENDING function to mix softened water with unsoftened water This function optimizes the consumption of salt thus preventing the possibility of corrosion of glass recipients due to excessively soft water When the
16. d or when the power supply is restored the water fill resumes from the point at which it was interrupted the new counter values are added to those previously memorized 7 7 Level stability during washing Once the fill phase has been completed the cycle proceeds to the washing phase The washing phase is carried out using cold or heated water and the status of the pressure switch is monitored constantly to ensure that the hydraulic system functions correctly Water replenishment cycles may be performed if necessary If the pressure switch returns to EMPTY during the washing phase the fill solenoid is energized for a maximum time equivalent to T S x 3 maximum allowable total fill time If this time is exceeded the washing cycle is completed but no further supplementary fills are performed In this situation alarm condition F 0 is stored in memory This alarm code is not displayed to the user but can be accessed by the Service Engineer using a specific procedure 7 8 Washing system The appliance features the classic washing system in which the mechanical washing action is obtained by the rotation of the washing pump which by ducting water into the hydraulic circuit actions the two spray arms simultaneously The washing pump is actioned by an asynchronous motor with a start up capacitor 3uF 450VL The washing pump rotates in a counter clockwise direction seen from the impeller side 7 8 1 Control of the washing pump The washi
17. e cycle thus ensuring correct dosage Some models feature a rinse aid sensor whose reed contact SB is connected to connectors G3 G4 on the circuit board The absence of rinse aid causes the contact to close which lights the corresponding LED on the display board 7 11 Drain The drain pump PS is powered by connectors C1 D1 and via the contacts of the switch door IP At the end of the drain phase a control procedure is performed to check that the contact of the level pressure switch is open on EMPTY If this is the case the appliance proceeds to the subsequent phase If as a result of a problem in the drain phase the pressure switch contact remains closed on FULL i e if there is water the hydraulic circuit the drain phase is repeated On completion of this second drain phase the status of the pressure switch is again checked If it is still closed on FULL alarm i20 is generated failure to drain The time out for each of these two phases is 120 seconds N B The washing programmes always begin with a drain phase 7 11 1 Siphon effect If the drain tube is incorrectly positioned the so called siphon effect may occur in which case an alarm is displayed iFO0 see 9 1 The problem is particularly likely to occur during execution of the declaration cycle although the drain pump shuts down at the end of the partial drain phase water continues to be expelled from the machine because the drain tube is incor
18. e washing temperature Reduction of the duration of the programme OR 4 4 2 Delayed start This option enables the user to set a fixed start delay of the washing cycle to select the delayed start time with door open 1 Switch the appliance on with SO button 2 Press the 1 button to select the delayed start time LED LD1 lights up to show that the selection has been made The time reset when the relative button is pressed again the LED LD1 switches off 3 Select the programme pushing S2 button in sequence 4 Close the door the countdown starts 5 When the countdown terminates the selected cycle starts 4 5 Cancelling a programme To cancel a programme that has already started Press button S2 for at least 3 seconds The LED of the current programme flashes Salt Rinse aid LEDs light up if featured the programme is cancelled and the appliance returns to preselection mode 4 The End of cycle LED flashes 5 Select the new programme 4 6 Interruption of a programme pause If the door is opened the appliance remains on the power loads are deactivated The Option LED remains on Closing the door the programme starts after a brief delay from the point at which it was interrupted Important If the appliance is switched off or if the door is opened for more than 30 seconds during the drying phase the cycle is considered to have been terminated after the regeneration phase when the appliance i
19. ection button S Tesee ea t ep Yea e bos du 6 4 3 Programme selection button 52 6 4 4 81o o e E 7 4 4 1 0 0 dcr o HE MEL DE MD ILE EE EAS 7 4 4 2 Delayed start re ree PEEL ERR e ERR E ERE Peu 7 4 5 Cancelling a programme isses ava cod eet oer tel ete ena aden dee qua ra 7 4 6 Interruption of a programme pause ssssssseeeeeennee nennen nennen nennen nennen nns 7 4 7 Ie RUE 7 5 SEQUENCE OF OPERATION teet derit end dicte oderit ead ec e aided 8 6 HYDRAULIC CIRCUIT aiii entree partt de et de ate e ci ut pede b etae d ferr quta toil 9 7 ELECTRICAL COMPONENTS AND FUNCTIONS sse ene 10 7 1 EDW503 Electronic control system seiniin 10 7 1 1 Functions of the circuit board rre ep ee en ree ed 10 7 1 2 Memory in the control system a tel el i pie pipe tte dete Cra mee het Mee ae 11 7 2 Specifications for actuators and sensors eene erre 11 7 2 1 sense AE Rete ceri e stes EEEa 11 7 2 2 NI rM PETER 11 7 3 Power supply and programme 12 7 4 Full i cR 12 7 4 1 Level and anti overflow pressure switch
20. fter each operation L3 and 14 on with steady S2 fortwo 4 flashes light Test cycle 9 times before L2 andL3 4 flashes L2 flashes The cycle starts automatically L3 and L4 on with switch off steady light Exit Memorize In order to memorize the functions or exit diagnostics mode switch the appliance off turning the knob to On Off position In most cases the memorization or the exit is automatic after 60 seconds in this case the appliance goes to pre selection mode 4 0 gt gt a 0 activate the user functions no cycle has to be selected to cancel them see 5 2 1 the appliance must be in pre selection mode SOI TD 2005 2 PR 26 26 599 36 83 66
21. gram MAIN BOARD EDW 503 SOI TD 2005 2 PR 22 26 599 36 83 66 12 2 Basic circuit diagram C5 BS EIT Ae G4 H1 HEATER NEUTRAL m TS 4 COMMON COMPONENTS 12 2 1 Key to circuit diagram AR Oranae CO Capacitor MR General terminal block PA Anti overflow pressure TACIT Tachometric generator Me 9 NE Black DD Detergent Rinse aid switch TS Safety thermostat BI White DFA MV Fan motor 5 PONE RO Pink dispenser RR Heating element Main Board Main board BL Blue ah nes PL Washing pump Ben Lilac EC Fill solenoid SB Rinse aid sensor User Interface Display board CE Light blue NONE n PS Drain pump m s AAIDA Anti flooding device Regeneration solenoid d SS Salt sensor GI VE Yellow Green 2 PU Pushbutton array mie x Turbidity Turbidity sensor MA Brown PR RL Level pressure switch IP Door switch ST Temperature sensor SOI TD 2005 2 PR 23 26 599 36 83 66 13 TABLE OF PROGRAMMES The table below lists the phases of the programmes for this type of appliance As these can be configured differently refer to the relative documentation for the specific cycles available for each model B Programmes Pre wash Wash 1 Cold Rinse 2 Cold Rinse Ho
22. nd L4 switch off Press button S2 all LEDs flash and the buzzer sounds SOI TD 2005 2 PR 20 26 599 36 83 66 11 3 Functional testing cycle This is an abbreviated washing programme 50 min which allows the Service Engineer to test all the functions that comprise a traditional washing cycle in effect the system simulates a normal cycle 11 3 1 Selecting the cycle To activate the function after accessing the diagnostics mode 1 Press button 2 twice before L3 and L4 switch off the LED 14 flashes the LEDs L2 and L3 light up Wait till the LEDs L2 and L3 switch off Press button S2 to activate the diagnostics cycle V L4 switches off LED L2 flashes for the whole duration of the cycle 11 3 2 Cycle phases Duration Water fill Turbo activation 30 Continuous washing dispenser 45 temperature dilution Continuous washing 60 Drain dilution Water fill Controlled washing 2600rpm heating at 60 C Controlled washing 2600rpm maintaining at 60 C N B At the beginning of the subsequent programme i e after the test cycle the resins are washed The overall duration of the test cycle is about 50 minutes 11 4 Exiting Service and User modes To exit these modes press button SO and switch the appliance off or wait 60 seconds the appliance returns to selection mode SOI TD 2005 2 PR 21 26 599 36 83 66 12 ELECTRICAL FUNCTIONS 12 1 Electrical circuit dia
23. ng a computer with a DAAS interface determine the functionalities of the appliance number and type of programmes options LEDs etc Asynchronous external serial port EEPROM Synchronous external internal serial to the uP 7 2 Specifications for actuators and sensors 7 2 1 Components TYPE OF TYPE OF COMPONENT POWER AVAILABLE ELECTRONIC CONTROL Wash pump Max 250W Triac Drain pump Max 100W Triac Heating element Max 2100W Relay Water fill solenoid Max 10W Triac Regeneration solenoid Max 10W Triac Detergent and Rinse aid solenoid Max 10W Triac 7 2 2 Sensors TYPE OF SENSOR Salt sensor Digital 5 Volt Reed Rinse aid sensor Digital 5 Volt Reed Temperature sensor Analogue 5 Volt Level sensor Digital High voltage Pressure switch Door closure sensor Digital High voltage Switch Anti flooding sensor Digital High voltage Switch NTC Temperature sensor NTC COMPARATIVE VALUES Temperature es Nominal value Q 10 gt 9655 25 gt 4850 60 gt 1205 90 gt 445 SOI TD 2005 2 PR 11 26 599 36 83 66 7 3 Power supply and programme selection The main board is powered by the closure of contacts The connectors used are B2 neutral and B1 line The control display board user interface is powered at 220V by the main board When the door is closed
24. ng pump PL is powered by the electronic control connector D3 D1 1 7 9 Heating The heating element is enclosed in a protective tube and is used to heat the washing water but does not switch on during the drying phase The heating element is fitted to the outlet of the washing pump and connected to the duct which feeds the upper spray arm The heating element RR is powered by electronic control connector A1 and by the level pressure switch RL which must be set to FULL contact closed on 1 3 Two safety thermostats are fitted to the heating element automatic reset thermostat which intervenes at 98 C SOI TD 2005 2 PR 13 26 599 36 83 66 a thermostat with a thermal fuse 206 C The temperature of the water is controlled by the main circuit board via an NTC sensor ST which is connected to connectors H1 H3 7 10 Integrated detergent dispenser The detergent dispenser is a plastic container consisting of two separate sections The first A contains the detergent the second B contains the Rinse aid The dispenser is of the single coil type and uses a single electrical coil connected to a mechanical system for both functions When the coil is energized it actions the mechanism via a series of levers to introduce detergent in a determined sequence first detergent then rinse aid The coil of the detergent dispenser DD is powered by an electronic control via connectors E1 E3 at certain points during th
25. odify the regeneration level selection depending on the water hardness e Activate or deactivate the buzzer signalling 10 1 Regeneration selection 1 Press button 0 to switch on the dishwasher V cancel any selected cycles pressing button S2 for at least 3sec the End of cycle LED flashes V if featured the Salt Rinse aid LED light up 2 Press and hold down button S2 the relative LED lights up until LED L2 starts flashing LED L3 ligths up steadily V Salt Rinse aid LEDs if featured switches off 3 Wait till LED L3 switches off regeneration level is displayed by the End of cycle LED which flashes and pauses at intervals 4 Press button S2 to increase the regeneration level according to the following values N Water fill between Time Position of o of flashes of i Hardness of water Level End of cycle LED regeneration regeneration tank treated procedures solenoid opens selector n Litres sec n F TH D dH 1 1 0 1 0 gt 7 0 gt 4 2 2 130 240 1 8 gt 18 4 gt 10 3 3 94 240 1 19 gt 25 11 gt 14 4 4 70 240 1 26 gt 32 15 gt 18 5 53 240 2 33 gt 39 19 gt 22 6 6 37 240 2 40 gt 50 23 28 7 7 20 240 2 51 gt 64 29 gt 36 8 8 15 240 2 65 gt 75 37 gt 42 9 9 10 240 2 76 gt 90 43 gt 50 10 10 3 2x240 2 91 gt 125 51 gt 70 5 Level set by factory Position of tank selector
26. rectly positioned When this occurs water loaded by the fill solenoid during the next phase is directly expelled so the full contact on the pressure switch does not close before its time out Thus if alarm iFO occurs it is a good idea to make sure the drain tube is correctly positioned as shown in the instruction manual SOI TD 2005 2 PR 14 26 599 36 83 66 7 12 Regeneration system Regeneration of the water softening system which takes around 4 min is usually performed at the start of the drying phase Every time regeneration is performed with activation of regeneration solenoid 4 the accumulation chamber is completely emptied of its contents about 230 cc of water Regeneration is controlled by the electronic control system Ad i e not at each washing cycle but rather at intervals determined by the level of regeneration selected If level 1 is selected regeneration is never performed and the SALT LED if featured always remains unlit If level 10 is selected regeneration is performed twice during each cycle first at the end of the washing phase and then at the beginning of the drying phase The regeneration solenoid ER is powered by connectors D9 C1 on the main board and by the contacts of the door switch IP Some models may feature a salt sensor whose Reed contact SS is connected to G1 G2 connectors of the board When there is no salt the contact closes and the rel
27. s switched on again it returns to programme selection mode 4 7 Power failure The Power Failure function maintains the information relative to the cycle status even in the even of a power outage when the power supply is restored the cycle resumes from the point at which it was interrupted If the power failure occurs during the drying phase the cycle is considered to have been terminated after the regeneration phase The Power Failure has been defined in the following way When a Power Fail occurs all loads switch off simultaneously to enable to save the data in EEPROM through the energy stored in the supply condenser of the control board and when the power is restored the cycle restarts from the point at which it was interrupted SOI TD 2005 2 PR 7 126 599 36 83 66 5 SEQUENCE OF OPERATION 2sec for 0 5sec aid LEDs light up 1 Switch on the appliance with button SO the End of cycle LED flashes every eventually if featured the Salt Rinse the LED LD1 lights up 2 Select the delayed start or the desired option if featured pressing button S1 wuo BRILLANTANTE OS SAE sequentially button 2 the relative LED lights up SELECTING THE CYCLE 3 Select the desired programme pressing codification 4 If LD2 flashes there is an alarm condition V press button S2 to try and solve the problem if it is not ok LD2 will flash again consult the Alarm
28. ss button S2 the End of cycle LED shows the first alarm memorised with a flashing sequence 3 Press button S2 other two times to display the other two memorised alarms the End of cycle LED displays the alarms 4 From the fourth activation the test of the single components starts according to the defined sequence the LED L3 switches on and remains on for the whole duration of the test of the components Ath actuation regeneration solenoid 5th actuation drain pump 6th actuation water fill solenoid and washing pump water up to level 7th actuation heating only if water up to level 8th actuation washing pump 9th actuation detergent rinse aid dispenser 10th actuation drying fan 11th actuation it starts again from the first alarm All positions can be repeated pushing button S2 sequentially A The components are powered with door closed If button S2 is not pressed for 60 seconds the diagnostics terminate automatically 11 2 Cancelling alarm codes from memory test of LEDs It is good practise to cancel the alarm memorised e after reading the alarm code to check whether it is repeated during the diagnostics test e after repairing the appliance to check whether it is repeated during the testing cycle To activate the function after entering the diagnostics mode 1 Press button 2 before L3 and L4 switch off the LED L3 flashes The LEDs L2 and L4 light up Wait till the LEDs L2 a
29. switch does not close on FULL after 90 sec static fill or never closes on FULL during the initial 60 sec of the dynamic fill at 2800 rpm The drain pump switches on then the cycle stops Tap closed water mains pressure too low fill solenoid wiring faulty hydraulic circuit of pressure switch obstructed level pressure switch wiring faulty circuit board faulty solenoid triac short circuited Water drain time out The pressure switch does not return to EMPTY after two drain phases lasting 120 seconds The drain pump switches on then the cycle stops Drain circuit obstructed blocked drain pump interrupted or jammed foreign bodies level pressure switch blocked on FULL 1 3 hydraulic circuit of pressure switch obstructed wiring faulty circuit board faulty Intervention of Anti flooding system the drain pump switches on The cycle is interrupted and the drain pump switches on Water leakage from the tub sump and various connections pump upper spray arm duct etc floating sensor blocked mechanically microswitch faulty fill solenoid blocked mechanically circuit board faulty solenoid triac short circuited wiring faulty TUBS of No flashes Displayed Ha m of end of to the cycle LED user i10 1 yes i20 2 yes i30 3 yes i50 5 yes Motor triac short circuited the washing pump runs uncontrolled at maximum speed Water fill to level if necessary deactivation of
30. t rinse a gt 5 3 T T i 5 amp T E E Ec o 2 2 2 5 A gt 23 2 323 eje Sio So E So E Type Programme 5 E229 3 Eo 5 2 e 5 2 5 85 Eg 5 2 o o Tro E gt o amp e jalo alv a a o Cc Py Tress SiN Els Ll gt gt gt E S9 gt ge 2 2 gt m intensive 55 10 130 3 rinses e 115 Energy label Marilyn 1367143 E1 F45 7 ctrl 5 lt 65 C 45 60 Q4 Soak E 8 12 Q5 Short 30 min 31 N B The overall times for the programmes duration are approximate and do not take into consideration the extra rinse which may be selected as an option The various phases do not include the times for regeneration washing of the resins which being performed Ad Hoc are not carried out at every cycle SOI TD 2005 2 PR 24 26 599 36 83 66 14 CHECKING THE EFFICIENCY OF THE COMPONENTS In order to facilitate the control procedure for the components to be tested a TEST PROCEDURE has been created which indicates the point to which the probes of the tester should be applied and the correct theoretical value for each component tested Remove the door and detach all the connectors from the main board
31. table for the 5 Close the door START The cycle starts automatically after 3sec or at the end of the countdown if the delayed start has been selected Open the door carefully EXECUTION OF CYCLE was interrupted 6 To interrupt a programme in progress To restart the cycle close the door NB Switching the appliance off and on the programme restarts from the point at which it 7 cancel a programme in progress S Ml Open the door and press button S2 for J9 about 3 seconds Sal SoG med Au eee The LEDs LD7 8 9 light up if cR NL ET mumn Sw featured I aim lt The LD1 2 LEDs switch and the s previous settings are cancelled 3 sec 8 Atthe end of the programme the buzzer emits a sound sequence The LED of the programme the End of a cycle LED and the Salt Rinse aid LEDs are fe eee Cx ne on if featured lt 9 Press button SO to switch off the appliance All LEDs switch off SOI TD 2005 2 PR 8 26 599 36 83 66 6 HYDRAULIC CIRCUIT KEY 1 Fill hose 10 Level pressure switch 2 Fill hose with Acquacontrol 11 Anti overflow pressure switch 3 Fill solenoid 12 Sump assembly 4 Regeneration solenoid 13 Wash pump 5 Air Break 14 Tube enclosed heating element 6 Steam condenser 15 Drain pump 7 Regeneration chamber 1
32. th the turbidity meter AM c Turbidity sensor faulty sensor wiring faulty circuit if featured Calibration Time out ge ie board faulty The heating element is switched USER Problems with the washing motor no off If the fault persists after the conr ud diu Bus 140 13 no signal from the tachometric generator Time out the washing pump J faulty CIT ER washing pump powered but no signal operates at maximum speed and y h meee A from the generator the alami codes stored ih generator interrupted E circuit board memory the cycle continues jn Dishes upside down central filter clogged Water replenishment Time out PP excessive foam leaks from the sump pressure iFO 15 no and without heating The error is 3 times during the T S Time out cancelled on eom lation ofa drain switch coupling pressure switch faulty false contacts If it is not possible to access diagnostics mode switch the appliance off and then on again to check that this is not caused by a temporary fault Before replacing the circuit board check that it is correctly powered by controlling the following Continuity of the power cable V Correct operation of the suppressor V Closure of the door switch contacts Continuity of the wiring between connectors on the circuit board and the suppressor SOI TD 2005 2 PR 18 26 599 36 83 66 10 USER MODE With this procedure it is possible to e M
33. the main board detects the closure of the contacts of the switch IP across connectors C1 C3 and starts the washing programme When the door is opened the power loads are disconnected from the power supply and the cycle is paused 7 4 Fill circuit 7 4 1 Level and anti overflow pressure switch e The level of water introduced into the appliance is determined by the level pressure switch e anti overflow pressure switch ensures that the level of water does not exceed the safety threshold causing overflow from the door 7 4 2 Fill system The water fill solenoid valve is powered by the electronic board via the connector D7 by the door switch IP and the anti flooding microswitch DA The level of water in the sump is monitored by the pressure switch RL The electronic board constantly monitors the status of the pressure switch via a sensing line connected to connector D5 c EMPTY if the contacts are closed on 1 2 c FULL if the contacts are closed on 1 3 7 4 3 Anti flooding device Intervention of the anti flooding device causes the contacts of the microswitch DA to open thus disconnecting the solenoid valve from the power supply 7 4 4 Intervention of the anti overflow system If the anti overflow pressure switch PA should intervene the closure of the contact on FULL 1 3 powers the drain pump PS The pump remains in operation until the contact returns to EMPTY 1 2 AN If the door is opened or the appliance
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