SERVICE MANUAL DISHWASHER ELECTROLUX HOME PRODUCTS ITALY S.p.A.
CONTENTS 1 2 3 4 5 6 7 PRECAUTIONS ...................................................................................................................................... 5 GENERAL CHARACTERISTICS............................................................................................................ 5 CONTROL PANEL.................................................................................................................................. 6 3.1 LCD ................................................
Regeneration system .................................................................................................................... 26 7.9 7.10 Resin washing ............................................................................................................................... 26 7.11 Regeneration levels ...................................................................................................................... 26 7.11.1 “Blending” function.............................................
Purpose of this manual The purpose of this manual is to provide service personnel (who have the basic knowledge necessary for repairing dishwashers) with information on dishwashers equipped with the EDW2503 electronic control system with/without “Talkie” functionality, which are produced in the Solaro (MI - Italy) factory. For detailed information on the water circuits and build characteristics of the appliance, refer to the Service Manual for the “DIVA 60 cm” (publication no. 599 35 55-25 e 599 35 87-82).
3 CONTROL PANEL The configuration of the control panel may vary with: Brand and appearance of unit Type of circuit boards used Number of buttons for selecting programmes Number of buttons for selecting options Number of LEDs and/or configuration of LCD 3.1 LCD These models use a new LCD display which can display the most common languages and all letters of the alphabet, numbers and symbols. Depicted above is the LCD display with all elements lit.
3.2 Controls 3.2.1 Turning the appliance on and off (S0) The ON/OFF button is installed on all models. The S0 button is used to turn the unit on and off. Turning off the unit with the S0 button does not cancel the programme in progress. Important! If the unit is plugged in, mains voltage is present on all circuit boards even when the ON/OFF button is not pressed (when appliance is shut off. 3.2.
3.3 “Talkie” Version Some EDW2503 dishwasher models features also the “Talkie” functionality. These models are configured so that they can communicate in different languages according to the brand/market. The “Talkie” version of the EDW2500 features a speaker contained in a plastic box (figg. A and B), hooked to the tie and screwed to the hinge, positioned on the left front side of the inner door (fig.
3.3.
50° ECO PLATE WARMER AUTOMATIC 70° INTENSIVE 55° SHORT 20 MINUTES EAT-LOAD-RUN Very dirty pots and dishes daily use. Automatically adjusts times, temperatures and consumption according to the quantity and dirtiness of dishes.
You can adjust the volume of all the acoustic signals The required volume has been stored You can activate or deactivate rinse aid dispensing. The modification is valid only if you have selected the 3in1 detergent option.
4 WASHING Wash programmes I3 Short Intensive 68 2 ☺ ☺ ☺ ☺ ☺ N2 Normal (maximum speed) 50 -- 68 1 ☺ ☺ ☺ ☺ N3 Delicate -- 55 1 ☺ ☺ ☺ ☺ ☺ N4 Delicate without prewash -- 55 1 ☺ ☺ ☺ ☺ ☺ Normal 3 rinses Normal 3 rinses without prewash Axx Energy label Fast Energy label Auto performance Energy label Auto 50-65°C Short Soak Short 30 min Heat plates -- 68 2 ☺ ☺ ☺ ☺ ☺ 68 2 ☺ ☺ ☺ ☺ ☺ 60 max 55 max Glassware N5 N6 E1 E4 E5 Auto Q1 Q4 Q5 Q6 Q7 ♦ ♦ ♦ ♦ ♦ ♦ ♦ Eco drying ☺ ☺ ☺ ☺ “Table
Full load: when the slope of the curve is less than the programmed standard threshold Half load when the slope of the curve is greater than the programmed standard threshold. Phases in the automatic programme Shown below are the variations in programme phases which are made as a function of dirt level and load. Type Phases in the programme Very Load Prewash Wash First rinse Second rinse Hot rinse Drying dirty? Full Yes 68º C cold Full No 55º C cold cold 68º C 24 min.
4.2.1 Cancelling a programme To cancel a programme after it has been started: 1. Open the door carefully • The LCD shows the message “Close the door” 2. Simultaneously press the buttons associated to the “Cancel” function: • The LCD shows the message “Interrupt?” 3. Press OK/Start button • the machine sets itself to the cycle selection mode with “Set the programme” on the display 4.
4.3 Options Every dishwasher with the EDW2500 control system is equipped with an “Options” button: 1. When Options button is pressed repeatedly, all available options are displayed in sequence o All available options are displayed on the LCD in sequence o The LCD shows the current setting for the option displayed 2. Press “OK/START” button to select the option to be modified o The LCD flashes the current setting for the option displayed 3.
4.3.7 Buzzer volume: When this option is set, it remains set until the setting is changed. The option is used to vary the volume of the buzzer and of the vocal messages from 0 to 5. The “buzzer disabled” icon appears on the display when the setting is “0”. The alarm vocal messages remain always active even if the selected level is “0”. 4.3.8 Brightness of LCD: When this option is set, it remains set until the setting is changed.
4.4 Sequence of operations SELECTING THE CYCLE 1. Open the door and press S0 button: The LCD display lights up with a welcome message 2. Select delayed start if desired (see 4.3.10) and/or any desired options 3.
5 BUILD CHARACTERISTICS 5.1 Structure The appliance can be subdivided into four main assemblies: - BASE AREA – DOOR AREA – TUB AREA – WATER UNIT The machine is housed in an assembly of individual removable parts composed of a front panel at the bottom and two side panels.
5.
6 ELECTRICAL COMPONENTS AND FUNCTIONS 6.1 EDW2503 Electronic control system The EDW2503 electronic control system consists of: • One central display board with LCD and uses a separate ON/OFF button. • One main board (fig. A) placed in the lower part of the appliance, anchored to the base by a plastic support (as for appliances “DIVA” EDW2000/2003/2500).
6.1.3 Power failures The “Power Failure” function stores information on the status of the cycle during a power failure so that when the power is restored, the cycle can resume from the point at which it was interrupted. If the appliance is in the drying phase when a power failure occurs, the cycle will end after the regeneration phase 6.2 6.2.
6.3 Power feed and selection of programmes The main board is powered directly by the terminal board. The connectors involved are E3 (neutral) and E1 (line). The control/display board (user interface) is powered by 5V supplied by the main board, so programmes can be selected when the main board is turned on. When the door is closed, the input board detects the closed contacts on switch (IP) between connectors F1-F3 and starts the wash programme. The same switch supplies power to the electrical components.
In order to keep a constant amount of water in the machine, if the pressure switch should re-open to EMPTY, fresh water is introduced until the switch returns to FULL. The fill cycle is subdivided into the following sub-cycles: 7.2.1 Static filling With the motor switched off, the fill solenoid is activated and water is introduced into the appliance until the pressure switch switches to FULL 7.2.
7.4 Washing system This appliance features the conventional washing system in which mechanical washing action is obtained from the wash pump, which circulates water through the water circuit and rotates the two spray arms simultaneously. The wash pump, which is equipped with a tachometric generator, is powered by an asynchronous motor equipped with a starting capacitor (3µF – 450V). The motor rotates anti-clockwise (as seen from the side of the impeller).
7.7 Built-in detergent dispenser This dispenser consists of a plastic container divided into two separate compartments which contain detergent (A) and rinse-aid (B). It is engaged by a single coil connected to a mechanical system that actuates both functions. When the coil is activated, it moves a set of levers that engage the mechanism, which first delivers the detergent and then delivers the rinse-aid.
7.9 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).
7.11.1 “Blending” function This function is performed inside the fill tank during the water fill phase. Depending on the position of the selector, softened water is automatically blended with the unsoftened water present in the appliance. The softened water is introduced from the softening system into the sump, while the unsoftened water flows (through the open by-pass valve) directly into the tank through the steam venting ring.
9 SERVICE A single procedure is used to access the diagnostic mode, also known as the Service mode.
9.2 Displaying alarms and activating individual components 1. Access the diagnostic mode (see 9.1) 2. Press button Ok/Start to begin displaying alarms: The display shows the last alarm that has occurred (to decode the alarm, see the table of alarms). 3. Press button Ok/Start once again to display the next to the last alarm that has occurred 4. Press button Ok/Start once again to display the third from the last alarm that has occurred 5.
9.2.1 Table of alarm codes 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.
Type of alarm Shown to user Description of ALARM Status of machine Possible causes i60 No Heating time-out (heating is checked every 3 minutes: the temperature must increase by a certain value every time) The programme is fully executed without heating (and with poor washing performance) Faulty heating element; Safety thermostats have tripped (open); Faulty wiring; Faulty NTC sensor (poor thermal contact); Poor water circulation in tub; Faulty wash pump (impeller stripped) Faulty main board i70 N
9.3 Cancelling alarms from memory Every alarm should be cancelled after it has been read and after the appliance has been repaired. When the next diagnostic test is run, this will enable the serviceman to know whether the alarm has occurred again. To cancel alarms: 1. Access the diagnostic mode (see 9.1) 2. Press button Options repeatedly until the following message appears on the display: 3 LED TEST 3.
9.6 Enabling / disabling an extra rinse The following procedure can be used to include a supplementary rinse in all wash programmes, which improves rinsing action. To add an extra rinse: 1. Access the diagnostic mode (see 9.1) 2. Press button Options repeatedly until the following message appears on the display: EXTRA RINSE NO (when NO flashes, the extra rinse is disabled) 3. Press button Ok/Start to toggle the setting The word SI flashes on the display (extra rinse is enabled) 4.
10 CIRCUIT DIAGRAM 34
10.
11 BASIC CIRCUIT DIAGRAM AR = Orange BI = White BL = Blue CE = Light blue GI-VE = Yellow-green MA = Brown NE = Black RO = Pink VI = Violet AA/DA = Anti-flooding device CO = Capacitor DD = Detergent/rinse-aid dispenser EC = Fill solenoid ER = Regeneration solenoid GA = Interference filter IP = Door switch MR = Terminal block MV = Fan motor PL = Wash pump PS = Drain pump PU = Button array PR/RL = Level pressure switch 36 PA = Anti-overflow level switch RR = Heating element SB = Rinse-aid sensor SS = Sal
11.
11.2 Checking components for proper operation To make it easier to check components, a TEST PROCEDURE has been developed which indicates the points where tester probes should be applied and the correct theoretical value for each component. Access the electronic board positioned on the basement and detach all the connectors. Connect the probes of the tester to the appropriate points.
12 QUICK GUIDE USER OPTIONS: Every dishwasher with an EDW2500 control unit is equipped with an “Options” button: Press options button repeatedly until the desired function appears on the display.
SERVICE OPTIONS: A single procedure is used to access the diagnostic mode, which is reserved for Service personnel: Press and hold down buttons Options and Ok/Start at the same time Turn on the appliance using button S0 o The LCD display lights up with a welcome message o The first item in the diagnostic mode appears When button Options is pressed repeatedly, the service functions available on the appliance appear in sequence.
13 TABLE OF PROGRAMMES The following table lists the steps in the programmes that are available on this type of appliance: ∆T +10' ctrl (∆T) 55°C ∆T +5' (∆T) 68°C ∆T +14' ctrl 2x3’ (<65°C) I3 Intensive short - - - - - - - (∆T) 50°C ∆T +2,5' ctrl (∆T) 50°C ∆T +10' (∆T) 68°C --- ctrl 2x5’ (<68°C) N2 Normal (max speed) - - - - - - - --- ∆T +6' ctrl N3 Delicate - - - - - - - --- ∆T +6' PW N4 Delicate without prewash - - - - - - --- --- --- (∆T) 50°C
