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Electrolux “DIVA” EDW 500 Service Manual

Dishwasher with electronic control “diva” 45-60 cm


Table of Contents
Spares Operations Italy
Corso Lino Zanussi, 30
I - 33080 PORCIA /PN (ITALY)
Fax +39 0434 394096
Edition: 2004-11
SOI/TD 2004-11 PR
Publication no.
599 36 44-44
Dishwasher with
electronic control
EDW 500
"DIVA" 45-60 cm
"partially integrated"
(PNC 911xx9...)
ZM - Solaro (IT)
599 36 44-44


Table of Contents

Summary of Contents for Electrolux “DIVA” EDW 500

  • Page 1 SERVICE MANUAL DISHWASHERS Dishwasher with electronic control EDW 500 © ELECTROLUX HOME PRODUCTS Publication no. (Functionalities) ITALY S.p.A. Spares Operations Italy “DIVA” 45-60 cm Corso Lino Zanussi, 30 I - 33080 PORCIA /PN (ITALY) 599 36 44-44 “free-standing” Fax +39 0434 394096 “partially integrated”...
  • Page 2 SOI/TD 2004-11 PR 599 36 44-44...
  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1 Purpose of this manual ..........................5 2 PRECAUTIONS ............................5 3 GENERAL CHARACTERISTICS......................... 5 4 CONTROL PANEL............................6 Start/Reset (S1) button ........................6 Option (S2) button..........................6 5 WASHING PROGRAMMES......................... 6 Options............................... 7 5.1.1 “1/2 load”..............................7 5.1.2 Delayed start...............................7 Cancelling a programme........................
  • Page 4 14 TABLE OF PROGRAMMES ........................24 15 CHECKING THE EFFICIENCY OF THE COMPONENTS ................ 25 15.1 Measurement points on the board wiring connectors..............25 16 QUICK GUIDE TO THE SPECIAL FUNCTIONS..................26 SOI/TD 2004-11 PR 599 36 44-44...
  • Page 5: Purpose Of This Manual

    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 EDW500 electronic control system, which are produced in the Solaro (MI - Italy) factory. The EDW1500 control system consists of a main circuit board and a control/display board.
  • Page 6: Control Panel

    4 CONTROL PANEL The configuration of the control panel depends on the following: styling number of buttons from a minimum of 1 (only Start/Reset) to a maximum of 2 number of LEDs [S1] - Start button [S2] - OPTION SELECTION button [LD0 - On/Off LED [LD1]- Start LED [LD2]- LED “OPTION”...
  • Page 7: Options

    5.1 Options 5.1.1 “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: Exclusion of Pre-wash (if featured) Reduction of the washing temperature Reduction of the duration of the programme 5.1.2...
  • Page 8: Sequence Of Operation

    6 SEQUENCE OF OPERATION 1. Turn the knob to select the desired programme. The LD0 placed above the knob lights 2. Select the delayed start or the desired option (if featured). The relative LED lights up. 3. Close the door. 4.
  • Page 9: Hydraulic Circuit

    7 HYDRAULIC CIRCUIT 1 - Fill hose Level pressure switch 10 - 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...
  • Page 10: Electrical Components And Functions

    ELECTRICAL COMPONENTS AND FUNCTIONS 8.1 EDW500 Electronic control system The EDW500 control system consists of a main circuit board and a control/display board. Both boards are housed in a plastic container (fig. 1). The programme selector is housed in the electronic board; the On/Off function is performed by the selector.
  • Page 11: Memory In The Control System

    8.1.2 Memory in the control system μP Power Fail and machine status Asynchronous Configuration of EEPROM Synchronous external serial the appliance (external internal serial to the μP) port 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.
  • Page 12: Power Supply And Programme Selection

    8.3 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, the main board detects the closure of the contacts of the switch (IP) across connectors C1-C3 and starts the washing programme.
  • Page 13: Dynamic Fill

    8.5.2 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.
  • Page 14: Control Of The Washing Pump

    8.8.1 Control of the washing pump The washing pump (PL) is powered by the electronic control (connector D3-D11). 8.9 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.
  • Page 15: Siphon" Effect

    8.11.1 “Siphon” effect If the drain tube is incorrectly positioned, the so-called “siphon effect” may occur, in which case an alarm is displayed iF0 (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 incorrectly positioned.
  • Page 16: Blending" Function

    8.14 “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.
  • Page 17: Alarms

    10 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.
  • Page 18 No. flashes Displayed Type of of end-of- to the Description of the alarm condition Machine status Possible causes alarm cycle LED user and “beeps” Heating element faulty; intervention of safety Heating Time-out The programme continues to the thermostats (open); wiring faulty; NTC sensor (poor (the check takes place every 3 minutes: end without heating (the washing thermal contact);...
  • Page 19: User Mode

    11 USER MODE With this procedure it is possible to: • Modify the regeneration level selection (depending on the water hardness). • Activate or deactivate the rinse-aid supply. 11.1 Regeneration selection To activate the function: 1. Press and hold down button S1. 2.
  • Page 20: Service Mode

    12 SERVICE MODE With this procedure it is possible to access the Service Diagnostics System. Once this mode is accessed, it is possible to: • read and cancel the alarms • control the operation of the various components of the appliance •...
  • Page 21: Functional Testing Cycle

    12.3 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. 12.3.1 Selecting the cycle To activate the function: 1.
  • Page 22: Electrical Functions

    13 ELECTRICAL FUNCTIONS 13.1 Electrical circuit diagram SOI/TD 2004-11 PR 22/26 599 36 44-44...
  • Page 23: Basic Circuit Diagram

    13.2 Basic circuit diagram 13.2.1 Key to circuit diagram CO = Capacitor PA = Anti-overflow pressure TAC/T = Tachometric generator AR = Orange MR = General terminal block NE = Black DD = Detergent/ Rinse-aid switch TS = Safety thermostat BI = White MV = Fan motor RO = Pink...
  • Page 24: Table Of Programmes

    14 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. Programmes Pre-wash Wash Cold Rinse Cold Rinse Hot rinse...
  • Page 25: Checking The Efficiency Of The Components

    15 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.
  • Page 26: Quick Guide To The Special Functions

    16 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. To activate the user mode, the selector must be turned clockwise; to activate the Service mode, the selector must be turned anti-clockwise. Function Activation of the function Starting the function...

This manual is also suitable for:

Edw 500

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