EDW500 / EDW503Electronic Controls for Dishwashers

ESSE-N / A.S. October 2004

2

EDW500 - EDW503

EDW500 and EDW503: new entry level electronic controls for dishwashers in the DIVA familyIntended to replace electromechanical timersEDW500 : variant for freestanding and built-in DWEDW503 : variant for fully integrated DWSimple single-board electronicsSimple microcontroller, hence reduced functionality compared to the other DIVA electronic controls

3

EDW500 Features

Rotary selector with 6 positions :integrated 2-pole main switchup to 5 programmes„Power on“ LEDSTART/RESET push button and LEDCycle phase LEDs: Wash-Dry-ENDSalt and rinse aid LEDsOn some models only: additional push button and LED for one option („Delay start“ or „Half load“)LEDs red and green, or all red, depending on model specification

4

EDW500

OptionLED

Wash

Rinse AidSalt

Rotary selectorwith integrated

main switch

Power OnLED

Optionpush button

(“Half load” or“Delay start”)

DryEND

START/RESETpush

button

Start/Reset-LED

5

EDW500 : Panel Variant

Depending on brand and model, RESET can appear also as PAUSE or CANCEL

6

EDW503 Features

Separate 2-pole main switchPush button for sequential selection of up to programmes, and of cycle resetUp to 5 programme LEDs: 1 for each programmeFunction LED (can be combined with Beam-on-Floor)buzzer (deselectable)Salt and rinse aid LEDsOn some models only: additional push button and LED for one option („Delay start“ or „Half load“)Final definition 1st quarter 2005

7

EDW503

OptionLED

Function LEDRinse AidSalt

Programme selection(sequential)

Main switch

Programme LEDs

Optionpush button

(“Half load” or“Delay start”)

8

Inputs

Programme selectorPressure switchNTCDoor switchReeds for salt and rinse aidFloat switch in bottom tray, in series with inlet valve (all DGN models, ZM only with safety hose )no tachymetric generator

9

Loads

Heating controlled by relay on PCBCirculation pump controlled by triac:

No pulse wash (in absence of tachymetric generator)On models featuring the half-load option, uncontrolledly reduced pump speed is used during dynamic fill when this option is selected

Small loads controlled by ACS (AC switches):Inlet valveDetergent and rinse aid dispenserDrain pumpRegeneration valveDrying fan possible, but not specified for any model yet

10

Circuit Diagram

NTC DETERG.DISPENSER

DOORSWITCH

REGEN.VALVE

INLET VALVE &FLOAT SWITCH

DRAINPUMP

CIRC.PUMP

SALTREED

RINSE AID REED

PROGRAMMESELECTOR

HEATING

PRESSURESWITCH

HEATINGRELAY

11

Cycle Start

EDW500:Rotate programme selector into desired position Press START/RESET push button once

EDW503 : Repeatedly press programme selection push button until LED of the desired programme is lit (Sequence begins with the last programme used)

Cycle starts approx. 3 sec after closing the door

12

RESET after Cycle Start

EDW500:Press the START/RESET push button again

EDW503 : Press programme selection push button for approx. 3 sec, until reset is confirmed by LEDs

Both:automatic reset if door is opened during drying phase (but only after the regeneration phase has ended) for more than 30 sec

13

Function LED on EDW503

LED flashing (0.5 sec on, 2 sec OFF) when appliance is switched on with the main switchLED keeps flashing during programme selectionLED off after cycle startLED on after cycle end

14

Installation Mode EDW500

Before switching on the appliance, press the START/RESET push button, and keep pressed ...

15

Installation Mode EDW500

Rotate programme selector to position 1 clockwiseKeep the START/RESET push button pressed untilLEDs „Power on“ and „Start/Reset“ start flashingLED „END“ will start flashing too, the number of flashes indicating the regeneration level setting

16

Installation Mode EDW500Water Hardness Setting

While in installation mode, the water hardness setting will be increased by 1 each time the START/RESET push button is pressed (after reaching 10, the count will start at 1 again)The last setting will be stored in memory

17

Installation Mode EDW500Water Hardness Levels

mmol/l French deg. German deg.

10L 9.0 – 12.5 90 – 125°TH 51 – 70°dH 10 flashes -- ** 9L 7.6 – 8.9 76 – 89°TH 43 – 50°dH 9 flashes 10 l 8L 6.5 – 7.5 65 – 75°TH 37 – 42°dH 8 flashes 15 l 7L 5.1 – 6.4 51 – 64°TH 29 – 36°dH 7 flashes 20 l 6L 4.0 – 5.0 40 – 50°TH 23 – 28°dH 6 flashes 35 l 5L 3.3 – 3.9 33 – 39°TH 19 – 22°dH 5 flashes 55 l 4L 2.6 – 3.2 26 – 32°TH 15 – 18°dH 4 flashes 70 l 3L 1.9 – 2.5 19 – 25°TH 11 – 14°dH 3 flashes 95 l 2L 0.7 – 1.8 7 – 18°TH 4 – 10°dH 2 flashes 130 l 1L below 0.7 below 7°TH below 4°dH 1 flashes 430 l

* regeneration is done in the drying phase of the cycle during which this total load was reached

** regeneration is done twice in a cycle: in the first rinse and in the drying phase

Regeneration after*a total water loadof approximately:

Setting indicated by - LED "END" (EDW500)- Function LED (EDW503)

Water Hardness RangeSetting

18

Installation Mode EDW500Water Hardness Levels

In addition to the electronic setting of the water hardness level, it is important to set also the by-pass lever on the water tank:

for water hardness levels 1 to 6: setting 0 for DGN, 1 for ZM (factory default)for water hardness levels 7 to 10: setting 1 for DGN, 2 for ZM

19

Installation Mode EDW500Rinse Aid Deactivation

After entering the installation mode, rotate programme selector to position 2 clockwiseSetting is indicated by LED „END“flashes once - rinse aid dosage active (default)no flash - rinse aid dosage and LED deactivatedChange setting by pressing START/RESET

20

Installation Mode EDW500Rinse Aid Deactivation

On some models, rinse aid deactivation will not be possible (always refer to user manual)On those models, the water hardness setting will also be shown in position 2 (and 3, 4, 5)

21

Exit Installation Mode

To exit installation mode, switch off the applianceIf not ended manually, the installation mode will end automatically 60 sec after the last user interface activationin either case, last settings will be stored

22

EDW500 - EDW503Service Mode Functions

Read alarm memory (3 alarms)single actuator selectionLED testclear alarm memoryStart factory test cycle

Other DIVA service mode functions not available on this platform

23

Service Mode EDW500

Before switching on the appliance, press the START/RESET push button, and keep pressed ...

24

Service Mode EDW500

Rotate programme selector to position 5 counterclockwiseKeep the START/RESET push button pressed untilLEDs „Power on“ and „Start/Reset“ start flashing

25

Service Mode EDW500Read Alarm Memory &Single Actuator Selection

After entering Service Mode, leave programme selector in position 5Press the START/RESET pushbutton once

the most recent alarm (if any) will be shown by thenumber of flashes of the LED „END“

26

Service Mode EDW500Read Alarm Memory &Single Actuator Selection

Repeatedly pressing the START/RESET push button will make the sequence continue in the known way: 2. 2nd alarm, if any3. 3rd alarm, if any 4. Regeneration valve5. Drain pump6. Inlet valve

fill to level / no fill if level already reached7. Heating only if level reached8. Circulation pump9. Detergent and rinse aid dispenser

10. Drying fan (if present)

27

Service Mode EDW500Single Actuator Selection

During single actuator selection steps 4 to 10 the LED „END“ stays permanently lit

28

Alarms

for user for service

Water inlet i10 once once

Switch point of pressure switch is not reached within:- 90 sec during the static fill phase- 60 sec during refill phases

45 sec drain after fault is detected

Drain i20 twice twiceSwitch-back point of pressure switch is not reached within 120 sec drain + 5 sec pause + 120 sec drain

Aqua Control / Overflow

protectioni30 3 times 3 times Inlet valve circuit open due to float switch

(or any other reason)

Heating i60 --- 6 times Temperature rise after 3 min less than 1K heating phase skipped

NTC failure (short or open

circuit)i70 --- 7 times Voltage drop over NTC outside of working

limitsheating phase skipped

Fill time fault iF0 --- 15 times Total fill time limit exceeded

* Alarms are shown: on EDW500: by number of flashes of LED "END" on EDW503: by number of flashes of Function LED and by beeps

RemarksFunctionAlarm code

inmemory

Alarm indication * Fault detection logic

29

Service Mode EDW500LED Test & Clear Alarm Memory

After entering Service Mode, rotate programme selector to position 4Press the START/RESET pushbutton once,all LEDs will start flashing for integrity check,alarm memory is cleared

30

Service Mode EDW500Start Factory Test Cycle

After entering Service Mode, rotate programme selector to position 3Press the START/RESET pushbutton once,factory test cycle will startReset function and LED behaviour like in user cycles

31

Exit Service Mode

To exit service mode, switch off the applianceIf not ended manually, the service mode will end automatically 60 sec after the last user interface activation