Electrolux 296EN Service Manual

SERVICE MANUAL

DISHWASHERS

Publication n°

599 33 62-96/

EN/SERVICE/LF

"NEW STRUCTURE"

DISHWASHER

ITRONIC « LL » 60cm

(FUNCTIONAL

DESCRIPTION)

INDEX

INTRODUCTION 5

GENERAL 6

CONTROL PANEL 7

FUNCTIONAL CHARACTERISTICS OF THE CONTROLS 8 - 10

WASHING SYSTEM 11 -12

SELECTING THE LEVEL OF REGENERATION 13

SAFETY FEATURES 14

SAFETY DEVICES / ALARMS 15 - 17

ELECTRONIC CONTROL SYSTEM 18

CIRCUIT DIAGRAM 19

FUNCTIONAL CIRCUIT DIAGRAM 20

CYCLES DIAGRAM 21

CONFIGURATION OF THE ELECTRONIC BOARD 22

PERSONALIZATION OF THE ELECTRONIC BOARD 23

TROUBLESHOOTING 24

FUNCTIONAL DIAGRAM 25

ALARM CONDITIONS 26

FUNCTION TEST CYCLE 27

PURPOSE OF THIS SERVICE MANUAL

The purpose of this Manual is to provide service technicians who are already trained in the repair of "NEW STRUCTURE" dishwashers with specific technical information relative to the new "ITRONIC LL" range.

The structural and hydraulic characteristics, as well as the basic circuitry, are similar to those used in the traditional appliances, and are therefore not discussed in this Service Manual.

For information relative to the specific models - technical characteristics, circuit diagrams, exploded drawings and parts lists - refer to the SERVICE NOTES issued separately for each specific model.

PRESENTATION

The new "ITRONIC" electronically-controlled dishwasher, with a modular 60 cm BUILT-IN structure, is produced in the FULLY-INTEGRATED version for manufacturers of kitchen furniture.

Its personalized styling features modern lines designed to match perfectly with the surrounding kitchen units; the simplicity of the control panel facilitates operation by the user.

The electronic control unit is the heart of the control system, which governs and monitors the operation of the appliance in order to ensure that the desired performance is achieved. The control unit consists of a control board and a power & display board, which are integrated into a single component.

This appliance is designed to facilitate and simplify servicing and repair. As in the previous series, these dishwashers with electronic control systems can be configured according to requirements. Checks and diagnostics can be effected quickly and easily by following a series of simple procedures (trouble-shooting, alarms etc.).

GENERAL CHARACTERISTICS

POWER SUPPLY: - 220-240 V / 50HZ (limits: 187 ÷ 254 V)

POWER ABSORPTION: - 2300 W (heating element: 2100 w)

WATER SUPPLY: - Min. / Max. pressure: 5 - 80 N/cm²

CAPACITY: - 12 place settings

CONSUMPTION : - WATER 19 LITRES

- ELECTRICITY 1.4 KWh

DURATION OF CYCLE: - 85 - 90 min ( UNIVERSAL Nº 3 )

NOISE LEVEL: - 52 - 53 db(A)

GENERAL INFORMATION

WASHING SYSTEM

SPRAY ARM MOVEMENT → SIMULTANEOUS

ACTIONING → SINGLE BIDIRECTIONAL MOTOR

WATER FILL LEVEL → VOLUMETRIC CONTROL &

→ PRESSURE SWITCH CONTROL

WATER HEATING → VISIBLE HEATING ELEMENT or

→ HIDDEN HEATING ELEMENT

TEMPERATURE CONTROL → TEMPERATURE SENSOR (NTC)

SAFETY FEATURES / ALARMS → HYDRAULIC DEVICES &

→ SOFTWARE PROTECTION

FIELD OF APPLICATION

ELECTRONIC MODULE FOR CONTROL OF:

POWER BOARD → MAIN CONTROL SYSTEM (built-in microprocessor)

CONTROL / DISPLAY BOARD → USER / MACHINE INTERFACE

LOADS AND SENSORS

THE POWER BOARD PILOTS THE FOLLOWING LOADS:

COMPONENT POWER CONTROL

 WASHING / DRAIN PUMP → 250 W TRIAC & RELAY  HEATING ELEMENT → 2100 W RELAY  FILL SOLENOID → 10 W TRIAC  RESET SOLENOID → 10 W TRIAC  REGENERATION SOLENOID → 20 W TRIAC  INTEGRATED DISPENSER → 10 W TRIA

AND MONITORS THE MACHINE PARAMETERS USING THE FOLLOWING SENSORS:

SENSOR TYPE

 TEMPERATURE → NTC  LEVEL → PRESSURE SWITCH  DOOR CLOSURE → SWITCH  ANTI-FLOODING DEVICE → SWITCH  SALT → REED

DESCRIPTION OF THE CONTROLS

→ ON/OFF SWITCH

CONTROL PANEL

PROGRAMME SELECTOR SWITCHES

→ "ON/OFF" LED (GREEN)

→ "SALT" LED (RED)

"PROGRAMME" LEDS (GREEN)

→ "END OF CYCLE" LED (GREEN)

FUNCTIONAL CHARACTERISTICS OF CONTROLS

USER INTERFACE

N.B. Keys SW1 - SW2 - SW3 - SW4 - SW5 are enabled only when the door is open.

SW0 ) "ON / OFF" KEY →→→→ - Press this key to switch the appliance on and off.

- LED La lights to show that the appliance is switched on.

"PROGRAMME" keys SW 1 ) SOAK SW 2 ) VIGOROUS WASH

SW 3 ) UNIVERSAL WASH SW 4 ) ECO / BIO SW 5 ) BREVE

- Each key selects a different washing programme.

- Press one of the keys to select the desired cycle.

- When a key is pressed, the corresponding LED lights.

"PROGRAMME" LEDs

L1 - L2 - L3 - L4 - L5 )

- As well as lighting normally to indicate whether the appliance is "ON" or "OFF", the various LEDs may also FLASH at different speeds depending on the type of situation and the operating conditions of the appliance:

- FLASHING_F N = Normal frequency (500 ms ON, 500 ms OFF).

- FLASHING_F V = Rapid frequency (125 ms ON, 125 ms OFF)

- OFF → function not operational

- LIT → function selected (during execution of the washing cycle)

- FLASHING_F N → function selected (during cycle selection phase)

- FLASHING_F V → non-operational condition (alarm condition, selection of regeneration level

etc.)

L s ) "SALT" LED

- ON → lights to indicate that the regeneration salt requires topping up.=

L f ) "END OF CYCLE" LED

- FLASHING_F N → lights to indicate that the washing cycle has ended.

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"BUZZER" - The piezoelectric buzzer is mounted on the control board.

- The buzzer sounds to indicate the beginning and the end of the cycle, and also when one of the keys is pressed (to confirm correct actioning).

operation of the buzzer:

Sequence_A (when a key is pressed): Sounds for 80 ms. Sequence_B (start of cycle): Sounds for 500 ms. Sequence_C (end of cycle): Sounds intermittently for 5 seconds (500 ms on, 500 ms off).

If it is preferred to exclude the buzzer, this option can be selected either in the PROGRAMME SELECTION phase or in the CYCLE EXECUTION phase as described below:

ACTIVATING AND DISACTIVATING THE BUZZER

With the door open and the DW switched on:

EXCLUDE BUZZER

- Press SW3 and SW4 at the same time, and hold both keys down for three seconds; the buzzer will sound (sequence_C) for three seconds, after which it will be disabled.

RESET BUZZER

- Press SW3 and SW4 at the same time, and hold both keys down for three seconds; after the three seconds have elapsed, the buzzer will sound (sequence_C) to indicate that the buzzer is again

enabled.

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