Electrolux 296EN Service Manual

SERVICE MANUAL

DISHWASHERS

			"NEW STRUCTURE"
			DISHWASHER
© ELECTROLUX ZANUSSI	Publication n°
			ITRONIC « LL » 60cm
ELETTRODOMESTICI S.p.A.
Corso Lino Zanussi			(FUNCTIONAL
I - 33080 Porcia (ITALY)	599 33 62-96/ 0		DESCRIPTION)
Fax [phone]	980828
	EN/SERVICE/LF

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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

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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.

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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)

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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

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CONTROL PANEL

DESCRIPTION OF THE CONTROLS

→ON/OFF SWITCH

PROGRAMME SELECTOR SWITCHES

→ "ON/OFF" LED (GREEN)

→ "SALT" LED (RED)

"PROGRAMME" LEDS (GREEN)

→ "END OF CYCLE" LED (GREEN)

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