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Electrolux 60 cm Series, Service Manual

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Electrolux 60 cm Series Service Manual Download Page 12

HYDRAULIC CIRCUIT COMPONENTS

The hydraulic system consists essentially of two principal components:

- the 

BASE

, whose function is to contain the liquids

-

IWMS

, whose function is to soften the water.

BASE

As well as acting as the load-bearing structure for the appliance, the base also contains the hydraulic
components.

- 12 -

Summary of Contents for 60 cm Series

Page 1: ...AL DISHWASHERS DISHWASHER NEW STRUCTURE 60 cm SERIES SOLARO MI ELECTROLUX ZANUSSI ELETTRODOMESTICI S p A Corso Lino Zanussi Publication no I 33080 Porcia ITALY 599 33 33 70 6 Fax 39 434 394096 970902 EN SERVICE FL ...

Page 2: ... 2 ...

Page 3: ...3 WATER DRAIN CIRCUIT 24 STEAM VENTING 25 HYDRAULIC SAFETY SYSTEMS 26 FUNCTIONAL FEATURES 27 38 CONTROL PANEL DW with electromechanical timer 27 ELECTRICAL CIRCUIT DIAGRAMS 28 31 CONTROL PANEL DW with electronic timer 32 33 SELECTING WATER HARDNESS LEVEL 33 ELECTRICAL CIRCUIT DIAGRAMS 34 35 FUNCTIONAL CHARACTERISTICS OF THE CONTROLS 36 38 SAFETY SYSTEMS 39 45 ALARM SYSTEMS 40 44 TROUBLE SHOOTING 4...

Page 4: ...ormation concerning the new range of dishwashers known as NEW STRUCTURE The structural and hydraulic characteristics as well as the basic circuits are common to all appliances More detailed information regarding specific models such as technical characteristics circuit diagrams wiring diagrams exploded drawings and lists of components may be found in the SERVICE NOTES issued separately for each mo...

Page 5: ...s Mechanical adjustment of regeneration level or via software for electronic models Reduction of quantity of washing water 0 5 litres per fill with respect to previous dishwashers ELECTRICAL SYSTEM Integrated dual function pump motor washing and drain Newly designed timers electronic circuit boards to optimize performance and consumption Vented drying system for top of the range electronic models ...

Page 6: ...LECTROMECHANICAL TIMER Fully built in 3 4 buttons 6 9 washing programmes 2 3 washing temperatures Programme selector knob 5 regeneration levels Impulse drying ITRONIC LL STANDARD Version Functions FULLY BUILT IN TCR ELECTRONIC TIMER 6 BUTTONS 5 washing programmes 4 washing temperatures Programme selector key 5 regeneration levels Impulse drying ITRONIC HL MEDIUM DE LUXE Version Functions FULLY BUI...

Page 7: ...PACITY 12 PLACE SETTINGS VERSIONS STANDARD MEDIUM DE LUXE ITRONIC CONSUMPTION WATER Litres 22 20 19 19 ELECTRICITY Kwh 1 5 1 5 1 4 1 4 DETERGENT grammes 20 20 20 20 DURATION OF CYCLE Min 2 100W 94 92 90 90 The data shown refer to the UNIVERSAL cycle 7 ...

Page 8: ...STRUCTURE 8 ...

Page 9: ...INTERIOR OF TUB SUMP 9 ...

Page 10: ...HYDRAULIC ELECTRICAL COMPONENTS 10 ...

Page 11: ...witch 5 Air break 18 Resin washing collector tank 6 Regeneration tank fill valve 19 Breather valve for resin washing tank 7 Regeneration tank 20 Sump assembly 8 Salt tank 21 Resin washing separator valve 9 Regeneration solenoid valve 22 Sump bottom valve 10 Resin washing solenoid valve 23 Wash drain pump assembly 11 Resin tank 24 Non return valve 12 Resin washing tank 25 Feed valve for upper spray...

Page 12: ...ts essentially of two principal components the BASE whose function is to contain the liquids IWMS whose function is to soften the water BASE As well as acting as the load bearing structure for the appliance the base also contains the hydraulic components 12 ...

Page 13: ...reather valve during the drain cycle in order to guarantee maximum efficiency of the pump time required to drain the tank 30 seconds 5 RESIN WASHING TANK SEPARATOR VALVE This floating ball valve is fitted to the exterior of the sump and is connected by a duct to the resin washing tank The function of this valve is to separate the salty water contained in the resin washing tank from the softened wa...

Page 14: ...imum level full this actions the drain siphon which transfers the water through a duct towards the bottom During this phase the water flow generates a dynamic pressure in the pressure chamber of the pressure switch 17 thus actioning the pressure switch which switches off the solenoid valve thus allowing the programme to continue At the end of the fill cycle and in any case before the beginning of ...

Page 15: ...WATER FILL CIRCUIT 15 ...

Page 16: ... tank 14 Drain siphon inside the volumetric tank 15 RESET solenoid valve resets the tank CONTROL OF WATER LEVEL IN THE TUB EMPTY FULL This system is based on a conventional pressure switch which is connected to a pressure chamber 17 and whose position makes it possible to control both the water in the volumetric tank and the level of the water in the tub The signal generated by the pressure chambe...

Page 17: ...LEVEL CONTROL CIRCUIT 17 ...

Page 18: ...olenoid valve 18 Resin washing water tank WATER SOFTENING CIRCUIT The water coming from the solenoid valve passes through the circuit until it reaches the resin tank 11 As it filters slowly upwards through the resin layer it is softened the water then passes into the resin washing tank 12 and from there it flows through the volumetric flow switch 13 and into the tub In the section of the circuit b...

Page 19: ...WATER SOFTENING CIRCUIT 19 ...

Page 20: ...ownwards through the resin layer instead of passing upwards as in the water softening phase The water then passes down to the resin washing water tank 18 which is positioned in the base of the appliance The water deposited in the resin washing tank 12 then passes by force of gravity through the resin layer 11 where it is washed and then descends slowly to the resin washing water tank 18 During thi...

Page 21: ...REGENERATION SYSTEM CIRCUIT DIAGRAM 21 ...

Page 22: ...C 2 26 40 15 22 50 cc 15 g A C B 3 41 60 23 34 90 cc 65 g B C A 4 61 90 35 50 270 cc 75 g B A C 5 91 120 51 70 300 cc 85 g A B C DW WITH ELECTRONIC TIMER Regeneration is performed at predetermined intervals depending on the level selected and not during every washing cycle REGULATION PROCEDURE Ten levels of regeneration can be selected each of which utilizes a fixed quantity of water 300 cc and sa...

Page 23: ...ing the water fill cycle If the valve is closed the corresponding dosing chamber remains empty When the regeneration solenoid valve is energized the chambers are completely drained of water DISHWASHERS WITH ELECTRONIC CONTROL SYSTEM Valves A B and C remain open thus the corresponding dosing chambers a b and c are always filled with water chamber d too which is independent is filled When the regene...

Page 24: ...operates in reverse direction clockwise as seen from the impeller side thus draining the sump 20 This generates a vacuum in the drain circuit which empties the pressure chamber of the pressure switch and causes the separation valve 21 for the resin washing water to open this ensures that the tank which contains the resin washing water 18 is emptied To ensure that this tank is completely drained th...

Page 25: ...en this is full and a small quantity of water which overflows from the volumetric flow switch It equalizes the pressure inside and outside the tub during the washing programme even if the door is opened or closed thus preventing any possible deformation of the tub or resetting of the pressure switch to the empty condition or interruptions of the cycle etc It improves the drying results by allowing...

Page 26: ...thus interrupting the cycle ANTI OVERFLOW system This mechanical device is built into the fill solenoid valve and connected to the IWMS As the water level in the sump rises the level in the anti overflow chamber of the IWMS too will rise since the sump and the chamber are connected by a tube If the water reaches the overflow level it descends through the siphon into the IWMS chamber this increases...

Page 27: ...omes more vigorous The cold pre wash cycle is performed at a temperature of 55 C and a second cold rinse cycle is added 4 PROGRAMME REFERENCE MARK This is the position at which to align the desired programme 5 PROGRAMME SELECTOR KNOB To select the desired programme turn the selector knob clockwise until the letter or number corresponding to the desired programme is in alignment with the programme ...

Page 28: ...FUNCTIONAL CIRCUIT DIAGRAM STANDARD TIMER 28 ...

Page 29: ...TIMER OPERATION STANDARD 29 ...

Page 30: ...FUNCTIONAL CIRCUIT DIAGRAM MEDIUM DE LUXE TIMER 30 ...

Page 31: ...TIMER OPERATION MEDIUM DE LUXE 31 ...

Page 32: ... ended Displays the level of regeneration from 0 to 9 Displays flashing letters when an alarm condition occurs Displays any options that have been selected C WRD LED green Lights when programme n 2 has been selected Indicates that it is necessary to introduce detergent into the WRD pre wash compartment 2 PROGRAMMES button Press to select the desired programme The LED flashes when a programme has b...

Page 33: ... enabled only when the door is open Must be held down for at least 2 seconds In the Programme Selection phase cancels all selections entered If pressed while the programme is in progress interrupts and cancels the cycle SELECTING THE WATER HARDNESS LEVEL OPEN THE DOOR Set the appliance to the Programme Selection phase SWITCH ON THE DISHWASHER If necessary press the ON OFF button Press the ECO DRYI...

Page 34: ...FUNCTIONAL CIRCUIT DIAGRAM ITRONIC 34 ...

Page 35: ...CYCLE SEQUENCE ITRONIC 35 ...

Page 36: ...TING THE PROGRAMME Press the programme selection button to select the desired programme Each time this button is pressed the programme number increases by one The BUZZER emits a short signal each time this button is pressed At the same time the selected porgramme e g 2 is displayed on the DIGIT window The PROGRAMME SELECTION LED continues to flash The WRD LED lights automatically when programme n ...

Page 37: ... 0 hours and is increased sequentially by 1 hour each time the button is pressed up to a maximum delay time of 9 hours At the same time the delay time is displayed on the DIGIT window in the form of a number from 0 to 9 A short buzz sounds each time the button is pressed The corresponding LED flashes to indicate that the number displayed on the DIGIT window refers to the delay time ACTIVATING DELA...

Page 38: ...h it was interrupted INTERRUPTING THE PROGRAMME When the door is opened the DIGIT window displays the number of the current programme Press the ON OFF button to interrupt the current programme When the ON OFF button is pressed again the programme number re appears and when the door is closed the programme resumes from the point at which it was interrupted CANCELLING THE PROGRAMME When the door is ...

Page 39: ...are in operation during programme execution PROGRAMME BEING EXECUTED When the door is closed the washing programme starts and the various selections cannot be modified This means that inadvertent actioning of the controls will have no effect During programme execution only the CANCEL option can be selected POWER FAILURE In case of a power failure the settings relative to the current programme rema...

Page 40: ...e ON OFF button SAFETY SYSTEM ALARM CODE Time out WATER FILL A Time out SUPPLEMENTARY FILL C Time out PRESSURE SWITCH EMPTY waiting for correct temperature F Time out TEMPERATURE SENSOR L Time out WATER HEATING H Time out PRESSURE SWITCH EMPTY end of drain P RESET CANCEL ALARM To reset or cancel an alarm condition press the ON OFF button to switch off the appliance Press the ON OFF button again th...

Page 41: ...onds The time out safety system becomes operative when the water level is reached pressure switch full 1 3 and remains in operation until the subsequent drain phase The time out counter starts as soon as the pressure switch is reset to empty 1 2 and ends when the pressure switch returns to full 1 3 If the time required for the pressure switch to return to the full condition 1 3 is more han 45 seco...

Page 42: ... 2 not more than 3 times Any further resetting of the pressure switch i e more than 3 times causes the cycle to be interrupted and an alarm condition to be generated SITUATION Appliance STOPPED When the door is opened DIGIT window F flashing LEDs OFF TEMPERATURE SENSOR Time out interrupted short circuited The correct operation of the temperature sensing circuit is controlled during the water heati...

Page 43: ...nutes an alarm condition is generated During the final drying phase after the last hot rinse has been drained this safety time out is no longer operative SITUATION Appliance STOPPED When the door is opened DIGIT window H flashing LEDs OFF PRESSURE SWITCH EMPTY Time out end of drain phase At the end of each drain phase it is checked that the pressure switch is in the empty condition 1 2 If the pres...

Page 44: ... hose Circular filter obstructed Dishes upside down Pressure switch faulty Leaks from pressure switch tube Control board faulty L TEMPERATURE SENSOR Instantaneous intervention during the heating phase Operating range 5 to 85 C Temperature sensor interrupted or out of range Connections loose interrupted Temperature sensor incorrectly positioned Temperature sensor short circuited Connections short c...

Page 45: ...ster probes should be applied for each component are described below together with the correct resistance values TRADITIONAL DW ITRONIC DW ELECTROMECHANICAL TIMER ELECTRONIC TIMER TEST CORRECT VALUE TEST POINTS OHMS POINTS DRAIN MOTOR 1 8 70 7 1 8 DRAIN MOTOR WASH MOTOR 3 8 48 7 3 8 WASH MOTOR REGENERATION SOLENOID 4 7 2450 8 4 7 REGENERATION SOLENOID FILL SOLENOID ANTI FLOOD 5 9 3800 8 5 8 FILL S...

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