Kuppersbusch EDW 1001 Series User manual

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Service Manual: H7-74-03E
Responsible: Dieter Rutz KÜPPERSBUSCH HAUSGERÄTE AG
Email: [e-mail]
Tel.: [phone] Kundendienst
Fax: [phone] Postfach 100 132
Date: 30.09.2010
Product identification
Code for the production numbers used for the various models (PNC)
First 3 figures
Product line DISHWASHER 911 xxx xxx
4th figure
Group DIVA 45 cm 9 place settings 6 911 6x x xxx
DIVA 60 cm 12 place settings 9 911 9x x xxx
5th figure
Structure
F.S. (45/60) 1911X 1x xxx
B.I. (45/60) 2911X 2x xxx
F.I. (45/60) 3911X 3x xxx
F.S./B.I.(B.U.) convertible
(45/60) 4911X 4x xxx
F.S. “BIG 60” 6911X 6x xxx
B.I. “BIG 60” 7911X 7x xxx
F.I. “BIG 60” 8911X 8x xxx
6th figure
Key typology &
electro-mechanical function
1 key 19119 X 1xxx
2 keys 29119 X 2xxx
3 keys 39119 X 3xxx
4 keys / + keys 49119 X 4xxx
Electronic function
EDW 1001-1100/ 1003 59119 X 5xxx
EDW 1500 / 1503 69119 X 6xxx
EDW 2000 / 2003 79119 X 7xxx
EDW 2500 / 2503 89119 X 8xxx
EDW 500 / 503 99119 X 9xxx
Last 3 figures
Product identification (customer/market) XXX 911 9 X X XXX
Example DIVA
electronic
F.S. EDW1001-1100 911 9 1 5 xxx
B.I. EDW1001-1100 911 9 2 5 xxx
F.I. EDW1003 911 9 3 5 xxx
B.U. EDW1001-1100 911 9 4 5 xxx
F.S. EDW1500 911 9 1 6 xxx
B.I. EDW1500 911 9 2 6 xxx
F.I. EDW1503 911 9 3 6 xxx
B.U. EDW1500 911 9 4 6 xxx
F.S. EDW2000 911 9 1 7 xxx
B.I. EDW2000 911 9 2 7 xxx
F.I. EDW2003 911 9 3 7 xxx
F.S. EDW2500 911 9 1 8 xxx
B.I. EDW2500 911 9 2 8 xxx
F.I. EDW2503 911 9 3 8 xxx
F.S. EDW500 911 9 1 9 xxx
B.I. EDW500 911 9 2 9 xxx
F.I. EDW503 911 9 3 9 xxx
B.U. EDW500 911 9 4 9 xxx
F.S. - Free-standing
B. I. - Partially integrated
F. I. - Fully integrated

DIVA Service Manual - EDW 1001 3
For internal use only
Contents
1. General ............................................................................................................................ 5
1.1 Purpose of this service manual ............................................................................. 5
1.2 Notes ..................................................................................................................... 5
1.3 General features.................................................................................................... 6
2. Control panel .................................................................................................................. 7
2.1 Control panel ......................................................................................................... 7
2.1.1 ON/OFF button (S0).................................................................................. 8
2.1.2 Programme selector buttons (S1-S5)........................................................ 8
2.1.3 Programme indicator LEDs (LD1- LD5) .................................................... 8
2.1.4 Cycle phase LEDs..................................................................................... 8
2.1.5 Indicator LEDs 13 and 14.......................................................................... 8
2.2 Options .................................................................................................................. 9
2.2.1 Using button [S5] as an option (1/2 load).................................................. 9
2.2.2 Delayed start button - [S6] ........................................................................ 9
2.3 Programme selection ............................................................................................ 9
2.3.1 Selecting the cycle (with the door closed)................................................. 9
2.3.2 Cycle execution....................................................................................... 10
3. Structural characteristics ............................................................................................ 11
3.1 Specifications for actuators and sensors............................................................. 11
3.1.1 Components............................................................................................ 11
3.1.2 Sensors ................................................................................................... 11
3.1.3 NTC Temperature sensor ....................................................................... 11
4. Operation of the wash / drain motor ........................................................................... 12
4.1 Wash / drain function........................................................................................... 12
4.2 Washing pump .................................................................................................... 12
4.2.1 Definition of the motor speed .................................................................. 12
4.3 Drain pump.......................................................................................................... 13
4.3.1 Drain function .......................................................................................... 13
4.4 Washing system .................................................................................................. 14
4.5 Washing system .................................................................................................. 14
5. Hydraulic circuit ........................................................................................................... 15
5.1 Water fill system - functional description ............................................................. 16
5.1.1 Definition of water level ........................................................................... 16
5.1.2 Static fill................................................................................................... 16
5.1.3 Dynamic fill.............................................................................................. 17
5.1.4 Pause ...................................................................................................... 17
5.1.5 Dynamic fill and level definition ............................................................... 17
5.1.6 Level control and stability........................................................................ 17
5.1.7 Supplementary fill.................................................................................... 18
5.2 Water fill time....................................................................................................... 18
5.2.1 Power failure during water fill phase ....................................................... 18
5.3 Control of stability during the washing phase...................................................... 19
5.3.1 Interruption of the washing cycle during water replenishment ................ 19
5.4 Control of drain cycle........................................................................................... 19
5.4.1 Interruption of the drain cycle.................................................................. 19
5.5 Anti-overflow safety system................................................................................. 20
5.5.1 Intervention of the anti-overflow device................................................... 20

4 DIVA Service Manual - EDW 1001
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5.6 Regeneration system........................................................................................... 21
5.6.1 “Blending” function .................................................................................. 21
5.6.2 Selecting the regeneration level .............................................................. 22
5.6.3 Resin washing ......................................................................................... 22
6. Drying circuit................................................................................................................. 23
6.1 “Activ Dry” drying system..................................................................................... 23
6.2 “Turbo Dry” drying system ...................................................................................24
7. Safety/control systems and alarms ............................................................................ 25
7.1 Alarm conditions [AL4], [AL5], [AL6], [AL7], [AL8] ............................................... 25
7.2 Alarm conditions [AL1]/[AL2], [AL3].....................................................................25
7.3 Table of safety systems / alarms ......................................................................... 26
7.4 Description of the alarms.....................................................................................26
7.4.1 Water fill time-out - Alarm [A L 5] - LED [Ld9] ........................................ 26
7.4.2 Water drain time-out - Alarm [A L 6] - LED [Ld10].................................. 27
7.4.3 Intervention of anti-flooding system -
Alarm [A L 4] - LEDs [LD9] + [LD10] ...................................................... 28
7.4.4 Heating time-out - Alarm [A L 3] - LED [LD11] .......................................28
7.4.5 NTC temperature sensor - Alarm [A L 1-2] - LEDs [LD9] + [LD11] ........28
7.4.6 Washing motor inoperative - Alarm [A L 7] - LEDs [LD10] + [LD11] ......29
7.4.7 Washing motor always running
Alarm [A L 8] - LESs [LD9] + [LD10] + [LD11] (triac short-circuited) .......29
7.5 Additional protective systems and safety devices ............................................... 29
7.5.1 Anti-pressure surge ................................................................................. 29
7.5.2 Door open................................................................................................30
7.5.3 Programme being executed ....................................................................30
7.5.4 Power failure ...........................................................................................30
7.5.5 Salt level..................................................................................................30
7.5.6 Rinse-aid level......................................................................................... 30
8. Options and diagnostics .............................................................................................. 31
8.1 Display/cancellation of alarm conditions stored in memory ................................. 31
8.1.1 Displaying the alarms stored in memory ................................................. 31
8.1.2 Cancelling alarm conditions stored in memory........................................32
8.2 Disactivation/re-activation of the rinse-aid LED...................................................32
8.3 Component diagnostics test ................................................................................ 33
8.3.1 Access to the diagnostics test ................................................................. 33
8.4 Functional test cycle ............................................................................................35
8.4.1 Access to the test cycle...........................................................................36
9. Electrical functions....................................................................................................... 37
9.1 Circuit diagram ....................................................................................................37
9.2 Basic circuit diagram ...........................................................................................38
9.2.1 Key to the circuit diagram........................................................................39
9.3 Table of programmes ..........................................................................................40
9.4 Checking the efficiency of the components ......................................................... 41
9.5 Measurement points on the board wiring connector
and the correct theoretical values........................................................................42
9.6 Table of alarm codes ........................................................................................... 43
9.7 Quick guide to the special functions .................................................................... 44

DIVA Service Manual - EDW 1001 5
For internal use only
1. General
1.1 Purpose of this service manual
The purpose of this Service Manual is to provide Service Engineers, who already have the basic
knowledge necessary to repair household dishwashers, with technical information regarding the specific
functionalities featured in the new “DIVA EDW 1001” range of electronically-controlled dishwashers.
The EDW 1001 control system consists of a main circuit board and a control/display board. Both boards
are housed in a single plastic container.
This system is used in fully-integrated versions with “DIVA” 60 cm structures.
This manual covers:
• General characteristics
• Control panel and programmes
• Technical characteristics
• 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 (H7-74-03 - Basic
features).
1.2 Notes
• Work on electrical appliances may only be carried out by suitably qualified
staff!
• Always disconnect the mains plug before touching components inside the
appliance.

6 DIVA Service Manual - EDW 1001
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1.3 General features
Mains voltage 230V / 50Hz (limits 187-254 V)
Total power absorption 2300W
Water connection Water supply min./max. pressure 5-80N/cm²
Filling capacity 12 place settings
Dimensions:
- Width
- Height
- Depth



59.6 cm
81.8 - 87.8 cm
55.5 cm
Control elements
- Display
- Programme selection / optional functions



vertical / horizontal
user interface and appliance
with buttons
Washing system Combined / pulse
Water fill level Pressure switch control + software
Water heating Tube-enclosed heating element
Temperature control NTC Temperature sensor
Drying system Active / Turbo
Safety features / alarms Total protection - hydraulic + software

DIVA Service Manual - EDW 1001 7
For internal use only
2. Control panel
2.1 Control panel
The configuration of the control panel depends on the typology of the electronic board:
- Horizontal controls
- Vertical controls
Version with vertical controls
Version with horizontal controls
S0 ON/OFF button
S1-S5 Programme selector buttons / optional function buttons
S6 Delayed start selector button
LD1-LD5 Programme indicator LEDs
LD6-LD8 Delay time (hours) indicator LEDs
LD9-LD11 Cycle phase indicator LEDs
LD12 Delayed start indicator LED
LD13-LD14 Salt / Rinse aid indicator LEDs

8 DIVA Service Manual - EDW 1001
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2.1.1 ON/OFF button (S0)
Switches the dishwasher ON and OFF. When the corresponding LED [LD0] lights, this means that the
appliance is switched on.
2.1.2 Programme selector buttons (S1-S5)
Each button corresponds to a specific programme.
- The various models feature from 3 (min.) to 5 (max.) programme buttons.
- Buttons S1, S2, S3 are featured on all models; these are also used for certain servicing functions.
- Button [S5] may be used as an option (½ load), in which case the maximum number of programme
buttons is reduced from 5 to 4.
2.1.3 Programme indicator LEDs (LD1- LD5)
When the appliance is switched on, all the programme LEDs (except 3/1, if disactivated) are lit to indicate
the programme selection phase. Press one of the buttons. The corresponding LED remains lit, and the
other LEDs switch off. The LED remains lit for the entire duration of the washing programme.
2.1.4 Cycle phase LEDs
The indicator LEDs provide the user with the following information:
- LD9: washing
- LD10: drying
-LD 11: end of programme: this LED is featured on all models.
The various LEDs light to indicate the corresponding phases of the washing cycle that will be carried out
or are currently in operation, depending on the programme that has been selected and the status of the
appliance.
Method of indicating the status of the appliance:
Programme selection LED [LD9] and, possibly, [LD10] flash simultaneously.
Execution of cycle Only the LED corresponding to the current cycle lights.
- In the washing phase, [LD9] is lit, [LD10] is off.
- In the drying phase, [LD10] is lit, [LD9] is off.
End of cycle LED [LD11] lights to indicate that the cycle has been completed;
the remaining LEDs remain off.
2.1.5 Indicator LEDs 13 and 14
-LD13: Salt: indicates that the salt reservoir is empty. If the level of regeneration is set to “1” (no
regeneration), this LED remains unlit at all times.
-LD14: Rinsing agent: lights when it is necessary to add liquid rinse-aid.
Method of indicating the status of the appliance:
Programme selection LEDs remain lit.
Execution of cycle LEDs off.
End of cycle LEDs remain lit.

DIVA Service Manual - EDW 1001 9
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2.2 Options
2.2.1 Using button [S5] as an option (1/2 load)
This option selects a special washing cycle for small loads.
The following parameters of the selected washing cycle are modified:
- The pre-wash phase is eliminated (in those cycles in which it is normally performed).
- The cycle time is reduced by 10 - 30 minutes, and the hot water consumption is reduced by about
5 litres.
2.2.2 Delayed start button - [S6]
Determines the delay time before the commencement of the cycle selected. Press this button repeatedly
until the desired delay time is displayed by the corresponding LED.
This indicator LED 12 lights when the delayed-start option has been selected.
DELAY TIME indicator LEDs - [LD6]  .. [LD8]
When the DELAYED START option is selected, these three LEDs light in sequence each time the button
is pressed [3h], [6h], [9h], or OFF.
- LEDs [3h], [6h], [9h] correspond to the number of hours before the cycle starts.
- The selected delay time is indicated by the corresponding LED [3h], [6h], [9h].
2.3 Programme selection
2.3.1 Selecting the cycle (with the door closed)
1. Switch the dishwasher ON by pressing [S0].
- The “POWER ON” pilot lamp lights.
- The SALT and RINSE-AID LEDs [LD13] [LD14] may light.
2. Press the button for the desired programme [S1 ... S4].
- The LED corresponding to the selected programme lights.
- The two cycle phase LEDs [LD9] [LD10] flash.
- Select the “½ load” option (if desired) by pressing [S5]. The corresponding LED lights.
3. About 6 seconds after the last button is pressed, the washing programme commences.
- If the programme is selected with the door OPEN, the programme will start 6 seconds after
the door is closed.
Proceed as follows to select the delayed-start time:
1. Press button [S6]. The corresponding LED lights.
2. Press button [S6] repeatedly; LEDs [3h] - [6h] - [9h] will light in sequence.
3. To cancel the delay time, continue to press [S6] until the LEDs switch off.
4. The delayed-start countdown begins about 6 seconds after the button is pressed for the last time.
The “POWER ON” pilot lamp lights.

10 DIVA Service Manual - EDW 1001
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2.3.2 Cycle execution
2.3.2.1 Washing programme currently being performed
- The LED relative to the selected programme [L...] remains lit.
- LED [LD9] for the current phase remains lit.
- As the programme proceeds to the subsequent phase, LED [LD9] switches off; LED [LD10] lights
until the end of the cycle, then switches off.
2.3.2.2 Delayed-start countdown
As the DELAYED-START countdown proceeds, the time to elapse before the start of the cycle is
indicated by LEDs [3h] - [6h] - [9h], changing at intervals of 3 hours starting from the highest value, until
all the LEDs have switched off.
- The LED for the selected programme [LD...] lights, and the cycle phase LEDs [LD9] and [LD10]
remain unlit.
- The DELAYED START countdown is not interrupted if the door is opened.
- All the buttons are disabled, with the exception of the Programme button [S...] relative to the
selected programme, which can be used to cancel the cycle, and the DELAY button [S6], which can
be used to modify or cancel the countdown.
- If the appliance is switched off by pressing button [S0], the power supply is disconnected. If the
same switch is pressed again, the appliance resumes operation from the point at which it was
interrupted.
- If the door is opened, the appliance remains switched on (though the power loads are disactivated);
when the door is re-closed, the programme resumes from the point at which it was interrupted.
2.3.2.3 Cancelling the cycle/delayed start
1. To cancel the current programme, press the button corresponding to the selected programme [S..]
indicated by the LED [LD..] for 1 second. The appliance returns to programme selection mode.
2. To cancel the delayed-start countdown, press the DELAY button (S6) repeatedly until the
countdown LEDs [3h] - [6h] - [9h] all switch off.
2.3.2.4 End of programme
- The end of the programme is indicated by cycle phase LED [LD11], which remains lit.
- To cancel the programme that has just been completed, open the door or press [S0] to switch the
appliance off.

DIVA Service Manual - EDW 1001 11
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3. Structural characteristics
3.1 Specifications for actuators and sensors
3.1.1 Components
3.1.2 Sensors
3.1.3 NTC Temperature sensor
Type of component Power available Type of electronic control
Wash pump Max. 250W Triac
Drain pump Max. 100W Triac
Heating element Max. 2100W Relay
Water fill solenoid valve Max. 10W Triac
Regeneration solenoid valve Max. 10W Triac
Detergent and rinse-aid solenoid
valve Max. 10W Triac
Fan motor Max. 10W Triac
Sensor Type of electronic signal Type of component
Salt sensor Digital 5 Volt Reed
Rinse-aid sensor Digital 5 Volt Reed
Temperature sensor Analogue 5 Volt NTC
Turbidity sensor Analogue 5 Volt Opto-electronic
Tachymetric sensor Frequency Tachymetric generator
Level sensor Digital high voltage Pressure switch
Anti-overflow sensor Digital high voltage Pressure switch
Door closure sensor Digital high voltage Switch
Anti-flooding sensor Digital high voltage Switch
NTC Table of comparative values
Temperature °C Nominal value Ω
10 9655
25 4850
60 1205
90 445

12 DIVA Service Manual - EDW 1001
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4. Operation of the wash / drain motor
4.1 Wash / drain function
The WASH and DRAIN functions are controlled by the electronic control board, which powers the
windings of the two pumps alternately by means of a switching relay fitted to the control board.
The electrical control circuit for the two pumps is piloted as
follows:
-Relay R1, which switches the power from one motor
winding to the other.
The switching procedure is as follows:
Wash motor => relay not powered
Drain motor => relay powered
-Triac(TY1) powers the winding of the washing pump and
determines its speed of rotation.
-Triac(TY2) powers the winding of the drain pump at a
constant speed of rotation.
4.2 Washing pump
- The washing pump features a variable-speed single-phase asynchronous motor.
- The motor rotates in a single direction.
- A tachymetric sensor housed internally constantly monitors the speed of the motor.
4.2.1 Definition of the motor speed
The operation of the motor during the washing cycle is controlled by the electronic control system, which
operates the motor at different speeds (fixed or variable). The signal sent by the tachymetric sensor to
the electronic control system (microprocessor) detects the speed of the motor; the microprocessor
performs a series of calculations and switches on the Triac which generates the appropriate speed.
The following motor speeds are used during the washing cycle:
FIXED speed VARIABLE speed
1600 rpm 1600 -> 2800 rpm
2300 rpm
2800 rpm

DIVA Service Manual - EDW 1001 13
For internal use only
Technical characteristics
Voltage 230V - 50Hz
Speed 2800 rpm
Power absorption 168 W
Capacitor 3µF
Direction of rotation Counter-clockwise
Delivery height 200 cm
4.3 Drain pump
- Synchronous centrifugal single-phase motor
- Rotation in both directions
Technical characteristics
Voltage 220/240V - 50Hz
Speed 3000 rpm
Power absorption 30 W
Delivery 22 l/min
Delivery height 90 cm
4.3.1 Drain function
The drain system is controlled by the electronic control unit by means of a system which powers the drain
pump at maximum speed (3,000 rpm) with 15-second pauses at intervals.
This sequence is designed to ensure that the impeller is not subject to cavitation and thus drains all the
water from the appliance.
Drain cycle sequence
DRAIN PUMP TIME (seconds)
Activated 3000rpm -> 3
 3  3  45  15
Disactivated Pause ->
 2 
2

2

15

End
<- 90 ->
213Ω
RM 1-2 = 48Ω
RA 1-(ro) = 117Ω
RM = 170Ω

14 DIVA Service Manual - EDW 1001
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4.4 Washing system
4.5 Washing system
The washing system is of the traditional type in which the mechanical washing action is provided by the
rotation of the washing pump. The pump ducts the water into the hydraulic circuit, thus actioning both
spray arms simultaneously.
In order to optimize the washing programmes, this appliance offers two different washing systems:
ctrl The electronic control unit powers the washing motor at the maximum speed (2800
rpm), in other words at fixed speed.
pulse Variable-speed (pulse) washing at 1600 > 2800 rpm. The variable-speed (pulse)
washing system is controlled by the electronic control unit; the washing m otor is
actioned sequentially at two different speeds (minimum and maximum) at brief
intervals. Two timings are used for variable-speed (pulse) washing:
Motor speed Time
Maintenance 1600 rpm -> 3 sec
Pulse PW1 2800 rpm -> 1 sec

DIVA Service Manual - EDW 1001 15
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5. Hydraulic circuit
From the solenoid valve (2/3), the water is ducted into the fill tank and across the air break (5) into the
steam condenser (6) until the condenser is full.
When the condenser is full to overflowing, the water is ducted through a channel into the regeneration
chamber (7). In this case, too, once the overflow level is reached, the water is divided into two parts
ducted through two separate channels.
- Part of the water passes through one channel directly to the softener (9) (resin container), from
which the softened water continues towards the sump.
- A smaller quantity of water is collected in one of the channels for use in the “Blending” function (this
function is described on page 21), where it is ducted directly into the tub through the steam venting
ring.
Please note! The steam condenser (6), once full of water, remains filled. With each subsequent fill,
the incoming water replaces the water previously present in the condenser.
The steam condenser (6) is drained through the fill hose (1/2) by a vacuum effect,
after disconnecting it from the intake tap and laying it on the floor.

16 DIVA Service Manual - EDW 1001
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Legend
5.1 Water fill system - functional description
For these dishwashers, fitted with motors with tachymetric sensors, the electronic control system is
designed to control the water fill by identifying a combination of signals which are measured according
to the speed of rotation of the motor and the status of the pressure switch.
The water fill system is constantly monitored by the level pressure switch, which acts as a pressure
sensor.
The tachymetric sensor which signals the speed of the motor to the electronic control system is
independent of the water fill level control function.
5.1.1 Definition of water level
The quantity of water required to perform the washing cycle is determined exclusively by the closure of
the electrical contact of the pressure switch, which switches from EMPTY to FULL.
In order to maintain a condition of equilibrium, this system ensures that, if the pressure switch should re-
open on EMPTY, fresh water is introduced until it returns to FULL.
It is therefore possible to ascertain with certainty that the status of the pressure switch - i.e. its position
of EMPTY or FULL - ensures that the cycle is performed correctly.
Washing cycle sequence
The fill phase is subdivided into the following sub-phases.
5.1.2 Static fill
With the motor switched off, the fill solenoid is activated and water is introduced into the appliance until
the pressure switch returns to FULL.
1 - Fill hose 11 - Anti-overflow pressure switch
2 - Fill hose with Aqua Stop 12 - Sump assembly
3 - Fill solenoid valve 13 - Washing pump
4 - Regeneration solenoid valve 14 - Tube-enclosed heating element
5 - Air-Break 15 - Drain pump
6 - Steam condenser 16 - Non-return valve
7 - Regeneration chamber 17 - Drain hose
8 - Salt reservoir 18 - Drying duct / Fan
9 - Resin reservoir 19 - Anti-flooding device
10 - Level pressure switch
Cycle phase Pressure switch status Stability / Objective
Water fill -> Switches from EMPTY to FULL -> Water fill level
Washing -> Maintained on FULL -> Water present
Drain -> Switches from FULL to EMPTY -> No water present

DIVA Service Manual - EDW 1001 17
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5.1.3 Dynamic fill
The motor is switched on at 2300 rpm, and water is introduced for 10 seconds (fixed time).
This condition makes it possible to start filling the hydraulic circuit. This is followed by:
5.1.4 Pause
The motor is switched off and the fill solenoid is disactivated for 5 seconds in order to allow the water to
return to the sump.
5.1.5 Dynamic fill and level definition
The motor switches on again at a speed of 2300 rpm, and water is introduced - if the pressure switch
signal is EMPTY - until the pressure switch returns to FULL.
The level is defined by the pressure chamber (located inside the sump), which is connected to the
pressure switch. This is followed by:
5.1.6 Level control and stability
When the pressure switch signal is FULL, the fill solenoid is switched off; the motor switches on at a
constant speed of 2300 rpm.
- A control procedure takes place, during which the pressure switch signal must remain closed on
FULL for 20 seconds without interruption.
- The hydraulic circuit operates in optimum conditions when the pressure switch signal remains stable
on FULL. In this case, the quantity of water inside the sump is sufficient to ensure that the motor can
operate without speed fluctuations caused by cavitation, which may occur when the water in the
sump is insufficient.
- When the pressure switch signal has remained on FULL for 20 seconds without interruption, the fill
phase is considered complete; the system advances to the subsequent phase.
- When this condition is reached, the appliance is said to be dynamically balanced.
- If the pressure switch signal should go to EMPTY during the 20 second control procedure, the fill
solenoid is again activated, and water is introduced until the pressure switch signal returns to FULL.
This control procedure is repeated until dynamic balance is achieved.
Please note! In this case, the water level is monitored constantly by the two special safety systems
(software and hydraulic) in order to ensure that an excessive water fill does not result in
water to overflow from the appliance.

18 DIVA Service Manual - EDW 1001
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5.1.7 Supplementary fill
On completion of the water fill phase, and before proceeding to the subsequent washing phase, the
system performs a fixed-duration percentage water fill which depends on the speed of the motor for the
subsequent washing phase (as specified in the cycles table).
The electronic control unit governs the supplementary water fill according to the type of washing system:
- (pulse) (pulse/variable-speed) or (ctrl) (fixed-speed washing).
5.2 Water fill time
During the entire duration of the fill phase (i.e. from sub-phase 5.1.1 to subphase 5.1.6), the solenoid
valve may remain in the open position for a maximum overall time of 4 minutes.
- Within this period, the system detects whether the pressure switch signal has stabilized on FULL.
- If the pressure switch signal stabilizes on FULL (sub-phase 5.1.1) after this 4-minute period during
which the solenoid is open, a time-out is generated and the appliance goes into alarm mode [AL5]
(no water).
5.2.1 Power failure during water fill phase
If the water fill phase is interrupted by a power failure, the fill always resumes from sub-phase 5.1.1 when
the power supply is restored; all the counters are reset to zero.
- The certainty that the fill results are correct is given by the fact that the aperture of the solenoid
depends only on the aperture of the pressure switch contact on EMPTY; in this way, water is
introduced until the level is sufficient to close the pressure switch contact on FULL.
- If the water fill phase is interrupted by opening the door, the values of all the counters are
memorized; when the door is re-closed, the water fill phase resumes from the point at which it was
interrupted.
Definition of the supplementary water fill
Type of washing Conditions
pulse (1600 > 2800rpm)
Pulse washing
Supplementary water fill (12%) with calculation based on the aperture
time of the solenoid valve, sub-phases 5.1.1 > 5.1.6
(quantity of water fill 3.9lt + 12% = 4.3lt approx.).
ctrl (2800rpm)
Fixed-speed washing
Supplementary water fill (24%) with calculation based on the aperture
time of the solenoid valve, sub-phases 5.1.1 > 5.1.6
(quantity of water fill 3.9lt + 24% = 4.8lt approx.).

DIVA Service Manual - EDW 1001 19
For internal use only
5.3 Control of stability during the washing phase
When the fill phase is complete, the appliance passes to the washing phase.
In the washing phase - with cold or heated water - the status of the pressure switch is monitored
constantly in order to ensure that the hydraulic system operates efficiently. Water replenishment may
take place if necessary.
- If the pressure switch returns to EMPTY, the fill solenoid is activated for a time (T) of:
- T _3 sec if the duration of the EMPTY signal is less than 0.5 sec.
- T _x sec if the duration of the EMPTY signal is in excess of 0.5 sec.
(T_x sec = variable time required by the pressure switch to commutate from EMPTY to FULL).
During the washing phase, the fill solenoid may remain open (also at intervals) for a maximum total time
of 60 seconds; if this period is exceeded, a time-out is generated and the machine passes to the alarm
condition ([AL5] - no water present).
5.3.1 Interruption of the washing cycle during water replenishment
If the washing cycle is interrupted due to a power failure, the current value in the counter which monitors
the solenoid aperture time (limit 60 sec.) is reset to zero. When the power supply is restored, the count
is restarted from the beginning.
If the washing cycle is interrupted by opening the door, the current value in the counter which monitors
the solenoid aperture time (limit 60 sec.) is memorized. When the door is re-closed, the count resumes
from the point at which it was interrupted.
5.4 Control of drain cycle
When the washing cycle ends, the appliance passes to the drain phase.
- In this phase, in order to ensure that the hydraulic circuit is empty before the start of the subsequent
phase (water fill), a control procedure is carried out at the end of the drain phase to check that the
contact of the pressure switch is open on EMPTY.
If this is the case, the appliance passes to the subsequent phase. If, due to a malfunction in the drain
phase, the contact of the pressure switch is closed on FULL (signalling the presence of water in the
hydraulic circuit), the drain phase is repeated.
- If, after this second drain phase, the control system detects that the pressure switch contact is still
closed on FULL, a time-out is generated and the system generates an alarm condition [AL6 - drain
not completed].
5.4.1 Interruption of the drain cycle
If the drain cycle is interrupted due to a power failure, the phase cancelled and all the information relative
to a possible incomplete drain cycle is lost. When the power supply is restored, the phase is repeated
from the beginning.
If the drain cycle is interrupted by opening the door, the information relative to a possible incomplete
drain cycle is memorized. When the door is re-closed, the drain phase resumes from the point at which
it was interrupted.

20 DIVA Service Manual - EDW 1001
For internal use only
5.5 Anti-overflow safety system
In all dishwashers in the new range, the anti-overflow safety system is constantly monitored by the safety
pressure switch (which acts as a pressure sensor) in order to prevent water from overflowing due to an
excessively high level.
- The safety pressure switch is connected pneumatically via a small tube to the sump, which contains
a second pressure chamber (air trap), located adjacent to that of the level pressure switch. In the
safety circuit, too, the air pressure is proportional to the quantity of water present in the sump.
- Therefore, in case of a malfunction in the hydraulic circuit, and if the water level exceeds the
predetermined safety threshold, the pressure switch intervenes by switching the electrical contact to
FULL.
5.5.1 Intervention of the anti-overflow device
If the safety pressure switch commutates to FULL, this immediately activates the drain pump, which is
connected electrically downstream of the circuit; the pump remains in operation until the safety pressure
switch returns to EMPTY.
The washing cycle continues in any case until completion.
- If the malfunction is caused by a temporary fault (dishes upside-down, excessive foam etc.) which is
rectified during the cycle, the user is unlikely to be aware that the fault has occurred.
- If the fault persists (e.g. leakage from the solenoid), water will remain in the tub at the end of the
cycle, and the drain pump will switch on and off alternately, since it is controlled by the pressure
switch (which cycles between FULL and EMPTY).
In this case, the electronic control system is not affected; this means that none of the safety and
alarm devices will generate a fault signal.
Please note: If the door is opened, or if the appliance is switched off, the drain pump switches
off, but the fault is not eliminated. In this case, it is necessary to turn off the
water tap.
Please note: The anti-overflow safety device is also operative when the appliance is not in operation.
In this case, the appliance must be connected to the power supply, switched on (by
pressing the ON switch), and the door must be closed.
If either of these conditions is not satisfied, the anti-overflow device is disactivated.
The connections for the anti-overflow system are shown in the diagram below.