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Merloni Elettrodomestici

Service manual

DISHWASHER EVO3

EN 03-05-20/01 1-54Language Issue/Edition Page


DISHWASHER EVO3Service manual



Contents

1 EXTERNAL FEATURES 6

1.1 Programme selector 6

1.2 LED 7

1.3 LCD 8

1.4 LVS free-standing range installation key 8

2 DESCRIPTION OF STANDARD CYCLE 9

3 DESCRIPTION OF EVO3 CYCLES 12

3.1 Resetting a wash cycle 12

3.2 Standard cycle 12

3.3 Glassware cycle 12

3.4 Duo Wash cycle 13

3.5 Auto Wash cycle 13

3.6 Super wash cycle 15

3.7 Eco cycle 15

3.8 Rapid cycle 16

3.9 Special guest cycle 16

3.10 Soak cycle 16

3.11 Special Filter Cleaning cycle 17

4 COMPLETE WATER LINE DIAGRAM 20

4.1 Composition 20

4.2 Fill line functioning 23

4.3 Wash line functioning 24

4.4 Drain line functioning 24

4.5 Symmetrical microfilter 24

4.6 Troubleshooting 25




5 FILL LINE AND OVERFLOW SYSTEM 26

5.1 Turbine fill functioning 26

5.2 Normal turbine fill analysis 27

5.3 Possible fill failures 27

5.4 Acquastop alarm 28

5.5 Bit 100 diagram 28

5.6 Replacing the Bit 100 card 30

5.7 Connection 33

5.8 Turbidity sensor 37

5.9 Use of rinse aid 37

5.10 Failures and possible causes 38

5.11 Duo wash 38

6 NEW DRYING SYSTEM WITH TURBO DRY (EVO 3) 39

7 SALT INDICATOR LIGHT 41

8 EVO3 TABLE OF ALARMS 46

9 TEST AND AUTOTEST CYCLES 49

9.1 To run the Test/Autotest programme follow the steps below: 49

9.2 RESET CODE 50

9.3 Test and Autotest specifications 50

10 CORRECT DISHWASHER FUNCTIONING 53




List of components

Fill solenoid 20

Water meter turbine 20

Air-break chamber 20

Water softener 20

Wash pump + 1/2 load solenoid 21

Wash pump + duo wash motor 22

Concealed heating element 22

Symmetrical microfilter 24

LED Card 32

LCD Card 32

Turbidity sensor 37

New dryer chamber 40

High pressure sensor 43

TR (open heating element) 44

Dispenser 45




1 EXTERNAL FEATURES

1.1 Programme selector

N.B. A DIWA 126 timer has been fitted in all machines with the 4 LEDs.

Programme type + reset Indicator lights

cycle status ON-OFF light

Salt indicator light

Programme

selector ON-OFF button

Programme selector, delayed start button

Cycle status and delayed start indicator lights




1.2 LED


Half-load buttonHalf-load indicator light

Programme indicator light

Programme selector

Start/Reset button

Cycle status and delayed start indicator lights

Programme selector, delayed start button

On/Off lightOn/Off button




1.3 LCD

1.4 LVS free-standing range installation key

ARISTON

L L 6 5 T XDishwashers External features Width Performances Safety features Colour

L = 4 LEDsD = LCD

X = Graphics display

Nothing = overflowT = AcquaStop

6 = 60 cm4 = 45 cm

Nothing = WhiteX = Stainless steel

N = Black

INDESIT

D 6 3 T YESDishwashers External features Width Performances Safety features Colour

Nothing = overflowT = AcquaStop

6 = 60 cm4 = 45 cm

Nothing = WhiteYES = Silver

Delayed start indicator light

Programme indicator light AUTO DUO WASH

Programme selectorStand-by

button

Start/Reset button

Cycle status indicator light

Leakage indicator light

Multifunction number readout

Rinse aid indicator light

Top/bottom rack indicator light

Extra dry indicator light





2 DESCRIPTION OF STANDARD CYCLE

The standard cycle comprises:

• one or more pre-rinses

• one wash cycle

• one cold or lukewarm rinse

• one hot rinse

• one drying cycle (see attached line drawing)

The pre-rinses remove larger food particles and are run with 5 grammes ofdetergent. In cycles such as the intense wash, the pre-rinse will be heated.

The wash cycle is the stage in which food particles are removed through theaction of the enzymatic detergent and temperatures reached.

The rinse cycles eliminate any remaining dirt from plates as well aspreparing them for drying by dispensing the rinse aid and taking thetemperature over 60°C.

1. Chart 1 shows the temperatures reached throughout the cycle and whenthe heating element switches on and off to reach the required temperature.

You will see the cold pre-rinse, wash with gradually increasing temperatureand hot-rinse stages.

time (min)

Variations in temperature during the cycle

heat

ing

elem

ent (

KW)

tem

pera

ture

(C°)

Chart 1




2. Chart 2 shows the activation of all motors:a) motor pumpb) drain pumpc) fan (installed in models with LCD readout and graphics display)

pumps

time (min)

motor pump (required wattage)

drain pump (watts)

fan (watts)

activ

atio

n (w

atts

)

Chart 2




3. Chart 3 shows the activation of the dispenser, fill, regeneration and watermeter solenoid valves.

fill water fill valve

fill turbine

regeneration valve

dispenser

time (min)

activ

atio

n

Chart 3




3 DESCRIPTION OF EVO3 CYCLES

3.1 Resetting a wash cycle

Switch the machine on, press the “P” key for 5 seconds and 4 beeps will sound.

3.2 Standard cycle

3.3 Glassware cycle

10 min. 26 min. 25 min. 10 min. (including wash)

1st pre-rinse 50°C wash. 70°C rinse Drying

Total litres filled = 16 lTotal time = 70 min.Energy consumption = 1.25 KWh


26 min. 12 min. 24 min. 31 min.

52°C wash. 1st rinse 50°C 2nd rinse 65°C Drying




3.4 Duo Wash cycle

3.5 Auto Wash cycle

The auto cycle is the programme that enables the dishwasher to select thebest cycle for the soil level of the dishes. The turbidity sensor is critical to the performance of this cycle. (see relativesection)The sensor can distinguish soil values from 245 (completely clean water) to 0(completely dirty water). The software powering the card can discriminate 10different soil levels that correspond to the 10 dishwasher programmes. As illustrated in the attached table (stages, times and temperatures table), thedishwasher always carries out the 1st pre-rinse. This is necessary to clear thetub of any residues from previous cycles, especially rinse aid. The sensor measures the soil level at the start of the second stage. If the soilreading is medium-high, the electronic control orders a second pre-rinse; ifthe soil reading is low, the control skips the second pre-rinse and starts themain wash cycle.Depending on where the soil value falls within the sensor's range, thesoftware continues to alter the maximum wash temperature and the timesthese temperatures are maintained during the pre-rinse, wash and rinsecycles. In the Auto Wash programme the dishes can be loaded at random in bothracks.


10 min. 38 min. 14 min. 21 min.

Pre-rinse

1st rinse 2nd rinse 65°C Drying

25 min.

51°C wash.




The dishwasher will select the fastest cycle to effectively remove the grimepresent in the machine.

3.5.1 Table of stages, times and temperatures

TURBIDITY VALUE

PLACE SETTINGS

1ST PRE-RINSE

2ND PRE-RINSE

MAX. WASH TEMP. WASH MAX. TEMP.

HOT RINSE

245 1 10 mins NO 40°C 8 mins 63°C 20 mins2 10 mins NO 45°C 11 mins 63°C 20 mins3 10 mins NO 45°C 20 mins 63°C 20 mins4 10 mins NO 48°C 22 mins 63°C 20 mins5 10 mins NO 48°C 22 mins 63°C 25 mins6 10 mins 6 48°C 22 mins 63°C 25 mins7 10 mins 10 mins 48°C 27 mins 63°C 25 mins8 10 mins 16 mins 48°C 27 mins 63°C 25 mins9 10 mins 16 mins 48°C 27 mins 63°C 30 mins

0 from 10 to 12 10 mins 16 mins 48°C 32 mins 63°C 30 mins

New sensorS = 245Clean dishes

S = 0Heavily soiled

dishesplace settings

S

New sensor: lightly soiled

place settings

S




3.6 Super wash cycle

3.7 Eco cycle


36 min. 10 min. 5 min. 28 min.

65°C wash. 2° Rinse

3° Rinse 66°C Drying

30 min.

1° Rinse

14 min.

40°C pre-rinse


18 min. 36 min. 24 min. 32 min.

2° Pre-rinse

63°C rinse Drying48°C wash.1st Pre-rinse

10 min.




3.8 Rapid cycle

3.9 Special guest cycle

3.10 Soak cycle

Total litres filled = 10 lTotal time = 25 min. no Extra Dry (optional)Energy consumption = 0.4 KWhWith extra dry the dishwasher hot rinses at 63°C. Time extended to 30 secs. New consumption 0.8 KWh.

10 min.

Rinse Drying with extradry

40°C wash.

15 min.


10 min.

Drying67°C rinse

25 min.


10 min.

Cold rinse




3.11 Special Filter Cleaning cycle

The Filter Cleaning cycle can be started in two ways:• if the pressure switch contacts do not close after water has filled i.e.

during the 2-minute pressure switch control, the filters will be cleaned.

• during each stage of the wash cycle, if the pressure sensor contacts stayreset for at least 5 seconds.

Cycle start:Drain + 1st fill

2.5l filled in-cycle via the turbine

Checkpressure switch

2 litres filled via the TURBINE between rinses

Motor pump ON

Check pressure switch for 2 seconds

Fill until pressure switch contacts close,

max 6 litres for 2 mins

Pressure switch

FILTER CLEANING PROGRAMME

Water level sensor / filter cleaning alarm AL 058 (see table of alarms)

Confirm programme

During the wash cycle the pressure switch

OPENS

The DW fills 4.2l during the 1st prerinse (approx. 0.5lextra, taking into account water deposited on dry dishes);3.8 litres remain to be filled.




There are three different types of filter cleaning cycle depending on whetherthe water pressure switch resets (or water pressure sensor < 0.15 bars) duringthe pre-rinse, wash or rinse cycles.

Case 1: filter cleaning during pre-rinse

Case 2: filter cleaning during wash

6.5l filled 6.5l filled

Drain

Drain

Drain and fill 6.5 l


Jog-type rinse 10’

1st wash impulses 16’

2nd wash impulses 24’Wash sump

Rinse to 70°C

1

If the sensor contacts open for at least 5 secs, after point 1 the rinse is repeated. If the sensor contacts open during the 2nd rinse (for at least 5 secs), after point 1 the dishwasher shows the filter cleaning alarm.




Wash sumpFill 2l

1st wash impulses 24 mins

2nd wash impulses

Jog-type rinse 10 mins

1

Rinse up to 70°C




Case 3: filter cleaning during rinse

1

Rinse to 70°C

Jog-type rinse 10 mins

Drain and fill 6.5l





4 COMPLETE WATER LINE DIAGRAM

4.1 Composition

The dishwasher's water line can be split into three units depending on thefunction performed, i.e.:

fill line including (components involved in water feed) the following devices:a) fill solenoidb) water meter turbinec) air-break chamberd) water softener

Fill solenoid Water meter turbine Air-break chamber Water softener

a) b)

c) d)




wash line including (components involved in wash water feed) the following devices:a) wash motor pump

WASH PUMP WASH PUMP + 1/2 LOAD SOLENOID




b) lower spray armc) concealed heating element + turbidity sensor (where applicable)

WASH PUMP + DUO WASH MOTOR

CONCEALED HEATING ELEMENT

TURBIDITY SENSOR(WHERE

INSTALLED)




d) upper spray arm

drain line comprising the drain pump

4.2 Fill line functioning

The water required during each dishwasher cycle is filled in different stages:a) start fill (fill solenoid active)b) start count litre impulses (turbine)c) 2-litre between rinse level reached with motor off, signalled by water

pressure switch to electronic card.d) in-cycle level reached (4 litres required for effective performance)

during cycle with motor on, signalled by the turbine to the electroniccard.




4.3 Wash line functioning

Once the required water level has been reached, the motor pump continuesto function during the wash stage. The water in the tub bottom extracted bythe sump is pumped to the lower and upper water inlets, thereby feeding it toboth spray arms. In the duo wash programme, the upper and lower waterinlets are activated alternately by the alternating motor on the wash pumpwhich closes one then the other inlet. The lower spray arm is fed almost directly as there are no water lines exceptfor the sleeve whereas the upper spray arm is fed via an external water lineand an internal one in the upper rack. The water dispensed from the spray arm nozzles generates the mechanicalforce required to turn them.

4.4 Drain line functioning

The water used by the dishwasher during the various wash stages is drainedby the drain pump which is fed from the sump. The drain pump stays on untilthe pressure switch detects that the water level in the tub has reached 70mm(pressure switch reset level: approx. 700cc), plus an extra minute to empty thesump.

4.5 Symmetrical microfilter

The “symmetrical” microfilter is an important part of the filtration system. It iscalled symmetrical because it can be fitted either way round. The purpose ofthis component is to hold the smallest debris particles released from dishes,which is does thanks to the stainless steel filter (or polycarbonate, wherefitted). Older dishwashers (Mark II project) featured an asymmetricalmicrofilter. When incorrectly assembled, this filter stops the mesh plate fromsealing correctly, generating blockages in the spray arm nozzles.

MARK2 EVO3Symmetrical microfilter




4.6 Troubleshooting

Dishwasher doesn't fillFirst and foremost, check that the tap is open. If it is and you are sure that thesolenoid is on during the fill stage, then you'll have to replace the solenoidvalve. If the dishwasher doesn't start to fill when a cycle is set, check if the pressureswitch contacts have reset or better still, if the drain pump is working and hasemptied the dishwasher; if there's water inside the tub preventing the pressureswitch contacts from resetting the dishwasher will not be able to start filling.Try to understand why the dishwasher did not drain. (see section “dishwasherdoesn't drain”)

If the motor doesn't rotate, it could depend on any of the following causes:• Is the dishwasher filling correctly? If the correct water level has not been

reached, either the turbine is not working, the pressure switch is notworking, the tap is turned off or the mains water pressure is too low.

• Is the motor connected correctly? If not, connect it correctly.

• Is the motor working? If the problem is caused by the motor, replace it.

The dishwasher isn't draining. Check the following possible causes:• Is the drain pump connected correctly? If not, connect it correctly.

• Is the drain pump clogged? Tooth picks, bones etc. can make drainingdifficult or almost impossible. Dismantle the drain pump volute and cleanit.

• Is the drain pipe twisted? Check and if necessary place the pipe in a moresuitable position.

• Is the drain pipe at the right height? Check how it has been installed. Thedrain pipe must be mounted from 0.4m to 1m from the floor.

Overflow due to leaks from water lineOverflows are possible when the water line is not assembled correctly orwhen the sleeves or other component parts directly involved in the water feedare worn. In this case, check where the leak is coming from and replace orreassemble correctly the component concerned. In relation to water line leaks, the drain pump oring may not have beenassembled correctly. If the leak can be traced to the drain pump, locate thegasket and check if it has been fitted correctly (fit it to the sump connectionon the pump).




5 FILL LINE AND OVERFLOW SYSTEM

5.1 Turbine fill functioning

Unlike previous ranges, water fill in the new dishwasher is no longer tied tothe pressure switch. Instead it is controlled by the water meter turbine.

The turbine generates a series of “impulses” as the water passes by theimpeller vanes. The cn-2 input on the electronic timer translates theseimpulses into litres of fill water.For each wash programme and tub status the pressure switch controls thevolume of water inside the wash compartment and signals if the heatingelement can be turned on. The turbine also guarantees the maximum level ofwater that can enter the wash compartment, thereby functioning as anoverflow device too. Water can not overflow from the overflow top because the holes havebeen closed.

Given the functions it performs, the turbine also controls the correctfunctioning of the pressure switch; in fact, when the first two litres have beenfilled between-cycles this control is performed. If the switch contacts areopen, the machine indicates a pressure switch alarm.

MARK2 EVO3




5.2 Normal turbine fill analysis

The fill logic is described in the diagram entitled “Special Filter Cleaningcycle”.The dishwasher fills water via the turbine directly and controls the pressureswitch. If the switch contacts should open during the two-minute control, thedishwasher continues to fill until the maximum 6 litre level is reached.The turbine fill method is different from the pressure switch fill because,regardless of the specific flow rate of the mains water supply and how thedishes have been loaded, the water fill rate is kept constant. The fill process is as follows:

• Tub emptied in impulses until pressure switch contacts reset (fixed time): 1min 20 secs and about 3/5 impulses depending on the time required forthe pressure switch contacts to reset)

• 2 litres filled between cycle (the tolerance level found in tests was +/-0.2litres)

• Additional 2 litres filled in-cycle (with the wash pump on)

• Check status pressure switch (90 mbar)

• If closed, ok. Otherwise fill to 6 litres: if the switch closes before 6 litres allis well. Otherwise the filter cleaning cycle will be run (if the switch doesn'tclose it means the filters are clogged or the switch is broken).

• The filter cleaning procedure is a sequence of water fill and drain stagesand jog wash cycles that removes any blockage from filters enabling thepressure switch to once again “feel” the water level.

5.3 Possible fill failures

Possible failures that may be encountered during water fill are linked tocomponents that may break after the fill control.

• turbine broken: in order to complete the cycle underway, the machine willproceed as if the fill process was controlled by the pressure switch. At theend of the cycle however, it will signal the turbine broken alarm.

• pressure switch broken: if the pressure switch breaks, the dishwasher willsignal the relative alarm at the end of the between-cycle water fill.

• pressure switch and turbine both broken: in this instance the dishwasherloads a maximum 8 litres of water in a specific time interval (minimumtime required for pressure switch contacts to close at low pressure fill, 0.3bars)

• fill solenoid breaks when on: in this instance the turbine can check if wateris being filled even when not requested: it generates the fill solenoid alarmand will start draining the wash compartment for the duration of the alarm(this works only when the machine is on; the double solenoid provides themost safety).




• drain pump broken: the presence of the pressure switch makes it possibleto check that the pressure switch contacts haven't reset. In such a case thefill time-out alarm would be generated.

5.4 Acquastop alarm

The acquastop, i.e. a float in the base tray, is an electromechanical safetydevice that activates when there is water in the base tray. In other words, when there's water on the base tray it closes a normally opencontact. By way of a cabled connection, this contact activates the drain pumpuntil the switch is closed. When does this happen? There could be a variety of causes although the mainone is most likely a leak from one of the pipes, even a very slight leak, giventhat the water is able to accumulate. Hence, it will activate not only whenthere is a large outflow of water; it's action can be triggered by very slightleakages from the water line or as a result of extraordinary failures.

5.5 Bit 100 diagram

One of the main differences of this model with respect to previousdishwashers is that in machines with the Stand By button, (i.e.dishwashers with LCD readout or graphics display) the electronic card islive when the machine is in Stand By. (Disconnect the plug from the mainsto cut off the voltage supply to the card and the dishwasher).Dishwashers with selector switches and LEDs have an On/Off button instead:when the machine is Off the card is not live.

On the cabling diagram and following photos, the follow utilities areadministered:

• fill solenoid, piloted by Triac (230V, 100mA, P =2W)

• regeneration solenoid, piloted by triac (230V, 100mA, P = 2W)

• directional control valve solenoid, piloted by triac (230V, 100mA, P=2W)

• duo wash motor, piloted by triac (230V, 100mA, P=2W)

• wash pump motor, piloted by triac (230V, 0.8A; P=65W mechanical,approx. 2800 rpm during normal operation)

• drain pump motor, piloted by triac (230V, 200mA, P=30W)

• heating element, piloted by relay when pressure switch contacts closed(230V, 10°, P=2000W)

• drying fan, piloted by relay when pressure switch contacts open (230V,100mA, P=15W)

• door open/closed input (230V; 0.5mA)

N.B. Do not touch the electronic card when live. Even with a p.d. of 5/12V, given that they are notisolated, all points on the card must be considered as 230V.




• pressure switch input (230V; 0.5mA)

• turbine input (5V; 0.01 mA warning - not isolated)

• external input/output card (5V, 6 mA warning - not isolated)

• delay/program key input (5V, 1 mA warning - not isolated)

• LED wash/delay timer LED output (5V, 1 mA warning - not isolated)

• NTC on door input (48K at 25°C this value is measured if the temperaturesensor is not cabled)

• high pressure input: high pressure sensor to increase clean filter algorithm.(230V 0,5mA)

Triac dispenser solenoid

Triac fill solenoidWash programme

memory

Triac regeneration

solenoidTriac drain pump

Triac Duo or half-load solenoid

Triac wash pump

Temperature sensor




5.6 Replacing the Bit 100 card

When you switch the dishwasher on after fitting a new card, the test cycle willbe run automatically (duration 30 mins.)To prevent this from starting:

• In dishwashers with selector switches, switch the machine on with theselector in the RESET position. You can now use your dishwasher.

• For dishwashers with LEDs, LCD and Graphics Display, switch the machineon and reset it (using the RESET button). You can now use yourdishwasher.

Heating element or fan actuation relay

Power supply Sensing elements for:- Door,- Pressure Switch- High Pressure

Buzzer

Serial connector

Water meter input




Examples of cabling between Bit100 and the interface cardLED Card

LCD Card

The diagram on the next page will help you to understand the individualfunctions of the actuators listed previously.




5.7 Connection

Fill valve connectionFlow of 4l/m230V~ power supplyTurbine 217 impulses/s

Drain pump connectionSynchronous motor230V~ power supplyWith the drain pump and the wash pump connected in series, the drain pump can be activated a lower voltages than the mainssupply

FILL SOLENOID

VA A J006 (Input turbine J006)

TURBINE

Q1TRIAC

NEUTRAL

LINE

Q1TRIAC

NEUTRAL

DRAIN PUMP

WASH PUMP

LINE




Regeneration solenoid connection

Wash pump and duo wash pump connectionQ2 activates the pump if Q1 is OFFQ3 controls the duo wash, where installed, or the half-load solenoid

REGENERATION SOLENOID

Q1TRIAC

NEUTRAL

LINE

DUO WASH MOTORWASH PUMP

DRAIN PUMP

NEUTRAL

LINE

Q1TRIAC

Q2TRIAC

Q3TRIAC




CONNECTION DIAGRAM WASH PUMP

REDAUX. STARTER

PRIMARY STARTER BLUE

BLACK

AMP F 180908 TERMINAL BOARD

FROM CONNECTION SIDE

CONNECTION DIAGRAM DUO WASH MOTOR

BLACK

RED

BLUE

PRIMARY STARTER

AUX. STARTER

WHITE

BROWN

BLACK

MOTORIZED CONTROL VALVE

GEARMOTOR

M

S

S

MOT

OR P

ROTE

CTIO

NM

OTOR

PRO

TECT

ION

SENS

ING

COND

ENSO

R

MOT

ORCO

MM

ONSE

NSIN

G




Dispenser connectionrinse aid and detergent dispenser

Fan / heating element connectionthe fan and the heating element have the same relay actuation; the heatingelement is activated when the pressure switch is in full and the fan when thepressure switch is in empty

LINE

NEUTRAL

Q1TRIAC

DIRECTIONAL CONTROL VALVE (Detergent / rinse aid dispensers)

LINE

NEUTRAL

FAN

LS1ARELAY SPDT HE

FAN 1

PRESSURE SWITCH

OPENFULL

2000W 230VCONCEALED / OPEN




5.8 Turbidity sensor

The turbidity sensor was installed in the dishwasher to identify a) the soil levelof the dishes and b) the presence of rinse aid.The sensor is housed in a sealed polypropylene tube inside a box which isinstalled hydraulically in the upper water inlet line. To be precise, it isphysically located between the upper water inlet line of the wash pump andthe concealed heating element. It is connected with a three-way connector. Itworks on the basis of an infrared transmitter that emits a light beam that iscaptured by the receiver which then sends an analogue signal to the Bit100timer.

Selecting a programmeTurbidity sensor used to detect soil grade.During a cycle, namely during the first pre-rinse, the soil level is measuredwith the wash pump on.Depending on the soil level read, the machine will alter the cycle by reducingor increasing the cycle times and temperatures of the subsequent stages. Thesensor distinguishes 10 different soil levels (there were 4 in mark2 dishwashers).The maximum turbidity level is equivalent to the most intense cycle while theclearest reading (ie. water) corresponds to the shortest cycle. The maximumturbidity level is equivalent to cycles on machines where this sensor is eitherinexistent or not connected.

5.9 Use of rinse aid

To control the use of rinse aid the same principle as the turbidity (soil) sensoris used. Namely, the water is measured 5 seconds before the rinse aid isdispensed and another reading is taking after (about 1 minute after). The tworeadings are compared to see if there is any difference in the quantity of rinseaid present. Irrespective of the information received, this data is stored to bedisplayed at the end of the cycle when the rinse aid LED/light will be turnedon or off.

Turbidity sensor




5.10 Failures and possible causes

As regards the turbidity sensor, it is essential that the LED (transmitter andreceiver) is correctly aligned to ensure it reads correctly. If there is a lot of foam the sensor will read maximum turbidity. The followingsituations are possible:

• If the machine is at the start of the second wash stage in an AUTOprogramme, the sensor will always select the longest cycle.

• If the rinse stage is underway the sensor will take a reading before andafter the rinse aid is dispensed. If there is still foam in the tub before therinse aid is dispensed, the sensor may not detect any difference betweenthe first and second readings and as a result the rinse aid indicator lightwill be lit at the end of the cycle.

In both cases the problem is not due to the sensor but to the cause of thefoam (e.g. rinse aid may have leaked from the dispenser, residues of detergenttablet rinse aid balls.Check all electrical connections as well: from the sensor up to the timer.

5.11 Duo wash

The system underlying the duo wash was designed to allow users moreflexibility when loading the machine, i.e. half-load either in the top or bottomracks.The duo wash motor is fitted to the wash pump. To be exact, the wholesystem is based on a vane which acts as a gate installed inside the pumpvolute. Depending on which rack you want to use, this vane will be movedby the small motor.At the beginning of each new cycle the machine will find the right position byresetting the system. This also serves to avoid starting in the wrong position. Athree-way connector is used for the electrical connection. It has three cablesfastened together, with terminals and installed inside the same connector asthe wash pump supply cables. The duo programme is piloted by three cables,a neutral and two phased cables. The system that recognizes the variouspositions and relative water supplies is underpinned by a mathematical modelbased on the rotation circumference of the vane.




6 NEW DRYING SYSTEM WITH TURBO DRY (EVO 3)

6.1 CHARACTERISTICS

The new turbo dry drying system installed on EVO3 consists of acondensation chamber which the motor fan is mounted on. This fan suckssteam from inside the wash compartment and dry air from the wall cavity /wash compartment where the chamber is located thereby facilitating theformation of condensation. This condensation is emptied through a drain pipethat connects the lower part of the chamber with the sump when the drainpump is activated.The steam extracted, practically moisture-free at this point, is subsequentlyremoved by way of a second water line within the chamber itself.

6.2 EXTRA DRY BUTTON

When you select the Extra Dry option (installed on LCD models) the washingmachine adds an extra five minutes of natural ventilation onto the end of thedrying cycle taking the temperature 3°C higher than the normal rinse: from 63to 66°C.

6.3 POSSIBLE FAILURES

Due to assembly imperfections, the drain tube may not be connected properlyat one end or the other, or there may be a hole in it. This type of fault would allow water to leak causing the dishwasher tooverflow.The tube could be twisted which would hinder the normal condensation flow. This would not be a serious fault as the water level in the chamber wouldonly ever reach the water level of the wash compartment and would notcause damage or a machine alarm. Another potential cause of failure could be that the exhaust motor has shortcircuited, overheated or the seal on the motor shaft is not perfect.

Nota: drying is based on a natural ventilation system in dishwashers where turbo dry has not beenfitted. The drying cycle lasts 30 mins for both the dryer and the natural ventilation system.




In this instance drying performance would be significantly impaired and thedishes would not be dried.

NEW DRYER CHAMBER

DRYAIR

PROCESSED AIR

ANYCONDENSATION

h




7 SALT INDICATOR LIGHT

First installation, new dishwasherThe salt container is empty and the indicator light stays on for fiveconsecutive cycles (only the first time, even if you were to fill salt at the 1st,2nd, 3rd and 4th cycles) for both the 60cm and the 45cm widths. Fill the salt container with water and add 1.5 - 2 kg of salt.

Salt meterThe algorithm (in the BIT 100) counts the activation of the regenerationsolenoid at the end of each cycle. At the end of the 29th cycle the dishwasherfills 600cc of water and turns on the “S” (salt) indictor light.

At the start of the next cycle fill the salt container as follows:

• Open cap

N.B. Add salt to the salt container before starting the next cycle.

600ccwater

SUMP

WATER SOFTENER




• Fill the container with approx. 1.5-2kg of salt so that approx. 600cc ofwater comes out. This water added to the water filled previously will causethe pressure switch contacts to switch from open to closed. As soon as thecycle starts, the timer recognizes the pressure switch closed impulseand switches off the salt indicator light, clearing the salt meter.

N.B.• If salt is not added before the end of the fifth cycle during the first

installation, the indicator light will switch off anyway.

• Following the first installation, each time the indicator light switches on itwill not go off until salt has been added as explained above in the sectionentitled “Salt meter”.

• At the first installation, the salt meter must be filled to the top with waterfirst and then salt.

• With the salt container you can adapt the quantity of salt used (+ / -) to thehardness of the water. As a result, if the arrow on the neck of the containeris set to “-” less salt will be consumed and vice versa if it is set to the “+”sign. The meter will switch on the indicator light in any case at the 29thcycle.

• If you top up the salt at the beginning of the 29th cycle (indicator light off)the light will still come on during the next cycle. In theory you should addthe salt again. However, given that it's already been added (water softenerfull of salt) the indicator light will stay on.

• If you add salt before the 29th cycle, at the 15th for example, the indicatorlight will still come on at the end of the 29th cycle.

600cc.

1200cc.

SALT

SUMP

WATER SOFTENER




• To get round this, add a litre of water to the wash compartment at the endof the cycle. This will make the timer read the pressure switch contactsclosed impulse and switch off the indicator light.

High pressure sensorThis is a new and important element in the SW management of seriouslysoiled dishes. This switch is mounted on the lower water inlet coupling,which in normal operating conditions reads 0.26bars.The sensor consists of a microswitch connected to a membrane that isactivated on contact with water.When the pressure in the dishwater goes below the level required to washdishes sufficiently (below 0.15 bars), as a result perhaps of clogged filters, themembrane disables the microswitch which then sends a signal to the timer.The SW triggers the jog-type “filter cleaning” cycle (programme A or Bdepending on the programme set - see relative table) to rinse the dirt from thefilters and enable the main cycle to proceed without the dishwasherregistering an alarm.

1 litrewater

SUMP




7.1 Regeneration process

Resins are regenerated (regeneration) during the rinse stage (the precisemoment depends on the programme).When the regeneration solenoid is activated, the water in the air breakchamber (approx. 200cc) runs into the salt container whereas the wateralready in the salt container runs into the resin container to regenerate thecontents (exchange of calcium and magnesium ions with sodium ions in thesalt). This ionic exchange lasts 20-25 minutes. Two resin washes will then beperformed; 1 litre of water at a time is filled that removes the salt waterpresent by way of the resins. One litre at a time is filled to prevent the saltwater escaping from the sump and reacting with the stainless steel tub.

7.2 ITR(safety thermostat)

A safety thermostat is used to protect the dishwasher, or more specifically, theheating element. The purpose of this device is to disconnect the electricalsupply to the heating element should the temperature exceed the safe limit.There are two different ITRs, one on the open heating element which can beseen between the bars of the element. On the concealed heating element ithas been integrated with the element itself.Cutoff values are listed in the following table:

7.3 Dispenser

A coil actuator activates the dispenser to dispense both detergent and rinseaid. The actuator device consists of the following components:coil Adoor lever Brocker arm Crinse aid lever Dpump EThe energised coil engages the door lever opening it.

Nota: if salt is not added when the indicator light comes on the resins will ensure the water is softenedfor a maximum of 5 more cycles. After this limescale will begin to form.

ITR (concealed heating element) TR (open heating element)98±5°C 78±1.5°C

ITR




When the current is removed the lever returns to its previous position andengages the rocker arm. When it energises again, the rocker arm moves therinse aid lever which opens the pump causing rinse aid to be dispensed intothe wash compartment. The rinse aid to be dispensed is stored in an adjustable container that fills tothe top when the door is FULLY opened. When the pump opens, gravitycauses the rinse aid to fall into the wash compartment.

Possible failures:the dishwasher doesn't dispense rinse aid and therefore the dishes are notdried properly or the rinse aid light won't go off.

• check if there is rinse aid in the container.

• check that the lever is working properly.

• check that the pump rises.

• check that the coil energises.

REAR VIEW DISPENSER

Dispenser




8 EVO3 TABLE OF ALARMS

KeySelector switch: selector switch modelsLED: LED modelsDisplay LCD: LCD readout modelsDuration of fault: the time between the occurrence of the fault and when it is signalled

Overflow alarmThe overflow alarm is signalled 9 seconds after the base pan float switchesfrom normally open to closed. All water fill processes are stopped, only thedrain pump stays on.

ALARM NAMEDISPLAY

DURATION OF FAULTProgramme selector LED LCD readout

Overflow LED 1 LED programme 3 TO 01 9 sec.Solenoid broken LED 2 LED programme 4 TO 02 9 sec.

NTC circuit Led 3 LED Programme 5 TO 04 9 sec.Timeout heating water LED 4 LED programme 6 TO 08 60 min.

Timeout draining LEDs 1 and 2 LEDs programmes 3 and 4 TO 03 4 min.

Timeout filling LEDs 2 and 3 LEDs programmes 4 and 5 TO 06 1 min. 30 sec.

Clogged filters LEDs 1 and 3 LEDs programmes 3 and 5 TO 05 After filter cleaning cycle

failsSoftware setup LEDs 1 and 4 LEDs 1 and 4 TO 09 1 sec.

Heating element circuit LEDs 2 and 4 LEDs programmes 4 and 6 TO 10 9 sec. if closed

pressure switchHardware version LEDs 3 and 4 LEDs 3 and 4 TO 12 1 sec.

Communication not possible TO 99

N.B. When a fault occurs with the dishwasher in Stand By mode (models with LCD readout andgraphics display), the fault is indicated on the display and a “safety procedure” started whereapplicable. This does not happen when the dishwasher is Off (models with Selector switch or LED).

LED programme 1 LED programme 6 LED 1 LED 4




Solenoid valve broken alarmAny time the machine detects movement of the turbine for ten seconds withthe fill solenoid off, a fault will be signalled. It stops all water fill processes and activates the drain pump.

NTC circuit alarmThe NTC circuit alarm is signalled after the electrical circuit is open or closedfor 9 seconds. It stops all water fill cycles and activates the drain pump.

Time out water heating alarmThe water temperature not reached timeout alarm is given when the watertemperature does not increase during 60 minutes of washing. It stops all water fill processes and activates the drain pump.

Time out drain alarmIf the machine does not detect open pressure switch contacts 4 minutes intothe drain cycle, the fault is signalled. All water fill processes are deactivated, only the drain pump stays on.

Time out fill alarmIf the machine does not detect turbine rotation and the pressure switchcontacts close 1 minute and 30 seconds into the drain cycle, the fault issignalled. It disactivates all water fill cycles and activates the drain pump.

Clogged filters alarmIf the pressure switch contacts do not close after a water fill cycle the filtercleaning programme will be run. After serving the pressure switch bycontinuing to fill up to 6 litres, the machine will start to wash for 6 minutes.After this the water will be drained. A further two litres are then filled to checkif the pressure switch contacts close. If this continues to remain open, thealarm is signalled. It disactivates all water fill cycles and activates the drainpump.

Software setup alarmThe type of software is not recognized in Eeprom. The cycle status LEDssignal the alarm.

Heating element circuit alarm The heating element circuit alarm is signalled when the timer sees thewashing heating element circuit open for 9 seconds. These 9 seconds start from the moment the pressure switch contacts close. Allwater fill processes are disactivated, only the drain pump stays on.




Hardware version alarmA user interface hardware model connected to the Bit100 is not recognized.The cycle status LEDs signal the alarm.

The following table lists the various faults (that may occur) and thecorresponding alarms on the new LVS EVO III. If the same alarm is mentionedmore than once (in separate rows of the table) this is due to the fact that morethan one failure can generate this particular fault.

TIMER MODEL EVO 3

ELECTRONIC TABLESN.B.:Count from left to right to identify the number of the flashing LED. Check the machine type, dimensions, number of programmes available and the installed timer before using the code.

SPARE PART CODE XXXXX XXXXX XXXXX

LVS TYPE Free Standing Free Standing

Free Standing

LED NO. -PROG. 4 6 LCD readout

POSSIBLE FAULT ALARM flashing LED flashing LED Alarm

Leak from water line OVERFLOW (water in base pan) 1 3 AL 01

cables have come loose in heating element circuit, timer relay faulty, heating element ITR not calibrated.

HEATING ELEMENT CIRCUIT not compliant 2-4 4-6 AL 10

Replace timer (NTC faulty). THERMISTOR (NTC) circuit not compliant (no continuity) 3 5 AL 04

NTC detached from casing or not calibrated.

Max. time to reach wash temp. exceeded (40 minutes) 4 6 AL 08

Drain pump faulty/cables disconnected or false contact, drain pipe blocked, timer faulty.

Max. time (4 minutes) for drainage exceeded (pressure sensor open).

1-2 3-4 AL 03

Valve closed, inlet SV faulty, SV cables disconnected.

Max. time for turbine rotation (3 minutes) exceeded or pressure sensor closed.

2-3 4-5 AL 06

cables disconnected, drain pump faulty, TRIAC timer broken.

ser. conn.

DRAIN PUMP electrical connection circuit not compliant 1-2 3-4 AL 03

cables on connector, motor or timer disconnected or inverted, aux. starter wash motor faulty, faulty, timer broken.

PRIMARY STARTER WASH MOTOR electrical connection circuit not compliant

1-3 3-5 AL 05

Condenser connection cables loose or condenser faulty.

AUX. STARTER WASH MOTOR electrical connection circuit not compliant

1-3 3-5 AL 05

cables disconnected, inlet SV faulty, TRIAC timer broken.

INLET SV electrical connection circuit not compliant 2-3 4-5 AL 06

cables disconnected on timer or heating element, timer faulty, ITR obstructed.

HEATING ELEMENT RELAY open. 2-4 4-6 AL 10

Drain pipe out of position, outlet valve too low.

PRESSURE SENSOR contacts open during wash cycle. 1-3 3-5 AL 05

Mesh plate, filter or microfilter clogged. Filters clogged. 1-3 3-5 AL 05

Inlet SV faulty. SV broken. 2 4 AL 02

Timer not programmed - Wrong keypad Software recognition error 1-4 1-4 AL 09

Cable or timer problems Communication not possible AL 99




9 TEST AND AUTOTEST CYCLES

9.1 To run the Test/Autotest programme follow the steps below:

• reset the dishwasher, door closed and empty, and keep it off for30 seconds

• switch it on (you will hear a beep), select PROGRAMME 1(in selector switchmodels move the programme selector round one position, in LED or displaymodels press the P key once), SWITCH IT OFF and wait 30 seconds.

• switch it on (you will hear a beep), select PROGRAMME 2 (in selector switchmodels move the programme selector round one position, in LED or displaymodels press the P key once), SWITCH IT OFF and wait 30 seconds.

• switch on (a beep will sound), the following indicator lights with blink together:

• 3 and 6 for LED models

• 1 and 4 for selector switch models

• you can now select either the TEST and AUTOTEST programmes

• Test programme: in selector switch models, turn the programme selectorround one position and press the P key once (the cycle lasts 20 minutes)

• Autotest programme: in selector switch models, turn the programmeselector round two positions and press the P twice, (the cycle lasts 4minutes)

• a beep will sound after a few seconds and the selected trial will start.

N.B. If there is a fault stored in the dishwasher memory, the card will light the corresponding LEDsfor the fault, or on machines with a display the fault will be shown on the readout. Make the necessary repair (disconnect dishwasher from power supply) and set a new Autotestcycle to check the outcome.

Indicator light 6

Indicator light 3

Programme 1 Programme 2




9.2 RESET CODE

With the machine powered up, hold the “P” key down for 5 seconds until youhear 4 beeps.To select a new test/Autotest cycle, wait for 20 seconds with the DW reset,off and door closed.

9.3 Test and Autotest specifications

1. Switch on the dishwasher. 2. Turbidity sensor reads only if the pressure switch is open (switch input

receives alternating current only when open).

• if the max. turbidity reading is detected (clean, connected), the rinse aidindicator light switches on until the end of the cycle.

• if the min. turbidity reading is detected (dirty, disconnected), the rinseaid indicator light switches off until the end of the cycle.

• if the rinse aid indicator lights stays off, the turbidity sensor is not working. Probable cause of malfunction: turbidity sensor disconnected or faultyor pipe section with light source is dirty, rinse aid indicator light notworking - disconnected.

3. Salt indicator light switches on until end of cycle (at the same time as therinse aid indicator light)

• if the salt indicator light stays off, it is not working. Probable cause of malfunction: salt indicator light disconnected orfaulty connection.

4. 3 litres water filled between rinses via the TURBINE + (search duo washparameters, wash top and bottom racks)

• if the timer does not receive the signal from the turbine but water isbeing filled, when the between-rinse pressure switch closes (at 1.2l), itwill switch on the wash motor and fill water until the in-cycle pressureswitch threshold is reached, for a maximum of 153 seconds fromenergization of the solenoid valve. Probable cause of malfunction: turbine disconnected or faulty.

5. 10 second pause, check HIGH PRESSURE sensor status, (must be closed)

• if the HP sensor is found to be open the dishwasher will show the filtercleaning alarm. Probable cause of malfunction: HP sensor disconnectedor faulty.

6. WASH MOTOR on.7. 1 litre water filled in-cycle through the TURBINE (4 litres in total), (with

wash motor on)8. pressure switch interrogation (O-C) (with wash motor on)

N.B. The Autotest starts at point 18




• if C (closed), stops filling and just washes

• if O (open), fills and washes until water level threshold reached or upto a max. of 8 litres If the switch is still open at 8 litres, the dishwasher shows the water level alarm. Probable cause of malfunction: faulty switch or cables disconnected/inverted.

9. WASH MOTOR switched on for 1 minute, ready to fill water if pressureswitch contacts open

• never more than a max. of 8 litres; more than this and the DW shows thewater level alarm. Probable cause of malfunction: pressure switch faulty or cablesdisconnected/inverted.

10.WASH MOTOR, HEATING ELEMENT, DIRECTIONAL CONTROL VALVE onfor 10 seconds

11.Check HIGH PRESSURE sensor status 5 seconds (top and bottom rackswash), (must be open)

• if the HP sensor stays closed, the DW will show the filter cleaning alarm. Probable cause of malfunction: HP sensor faulty.

12.Search duo wash parameters, wash only top rack 13.Check HIGH PRESSURE sensor status 15 seconds, (upper rack wash only)

(must be closed)

• if the HP sensor stays closed, the duo wash will not work, the DW will registeran alarm. Probable cause of malfunction: duo wash module faulty, cablesinverted. closed, the duo wash will not work, the DW will register an alarm. Probable cause of malfunction: duo wash module faulty, cables inverted.

14.Search duo wash parameters, wash upper and lower racks15.Water heated to 55°C

• if the heating element fails to heat up or the NTC does not register thetemperature, the dishwasher will show the temperature timeout alarm. Probable cause of malfunction: heating element disconnected or faulty,or NTC disconnected or faulty, or timer relay jammed

16.Drain O +15 seconds

• if the switch does not open in a max. 4 minutes, the DW will show thedrain timeout alarm. Probable cause of malfunction: drain pump disconnected or faulty,pressure switch faulty/cables inverted.

17.….START AUTOTEST CYCLE…… CONTINUE LONG TEST CYCLE…18.2 litres filled via the TURBINE between rinses

• if the timer does not receive the signal from the turbine but water isbeing filled, when the between-rinse pressure switch reaches its threshold(1.2 litres), it switches the wash motor on and fills water until thein-cycle pressure switch threshold is reached, for a maximum of 153seconds from energization of the solenoid valve. Probable cause of malfunction: turbine disconnected or faulty.

19.WASH MOTOR switched on



20.2 litres water filled in-cycle through the TURBINE (4 litres in total) 21.Pressure switch interrogated (O - C) (with wash motor on)

• if C (closed), stops filling

• if O (open), fills until pressure switch threshold reached or up to amaximum of 6 litres

• if the pressure switch has still not opened by 6 litres, the DW will showthe water level alarm. Probable cause of malfunction: pressure switch faulty or cablesdisconnected/inverted

22.1 minute wait while dishwasher prepares to fill with WASH MOTOR on

• never more than a max. 6 litres. More than this and the DW will showthe water level alarm. Probable cause of malfunction: pressure switch faulty or cablesdisconnected/inverted

23.5 seconds WASH MOTOR, HEATING ELEMENT on24.10 seconds DIRECTIONAL CONTROL VALVE on25.10 seconds WASH MOTOR26.REGENERATION solenoid energized 15 seconds27.HEATING ELEMENT on 10 seconds28.DUO WASH on 10 seconds29.drain O + 5 secs.

• if the pressure switch does not open by max. 4 minutes, the DW will showthe drain timeout alarm. Probable cause of malfunction: drain pump disconnected or faulty orpressure switch faulty/cables inverted.

30.WASH MOTOR (switch open) on 5 seconds31.MOTOR FAN on 10 seconds32.FILL SOLENOID VALVE on 20 seconds33.END CYCLE

Nota: the test cycle must fully reset as happens with the wash cycle.


10 CORRECT DISHWASHER FUNCTIONING

• no. revolutions lower spray arm38+-5

• no. revolutions upper spray arm20+-5

• wash compartment low water levelSame level as filter removal handle (3.6 litres - 3.8 litres)

• Lower rack water pressure 0.26+-0.02 bars, measured in upper water inlet pipe

• Upper rack water pressure 0.13+-0.02 bar, measured in top rack/spray arm shaped attachment




Merloni Elettrodomestici S.p.A.viale Aristide Merloni, 47 - 60044 Fabriano - Italytel. 0732/6611 - telex 560196 - fax 0732/662954www.Merloni.com


All parts of this document are the property of Merloni Elettrodomestici S.p.A. All rights reserved.The manufacturer will not be held responsible for any error or omissions regarding this manual and all information contained therein. It may not be reproduced, used orextracted either in full or in part unless authorization has been given in writing or by a contractual clause.

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