Electrolux 990EN Service Manual

ELECTROLUX ZANUSSI S.p.A.

Spares Operations Italy Corso Lino Zanussi,30

I - 33080 PORCIA /PN (ITALY) Fax +39 0434 394096

Edition: 10.2003

Publication

number

599 36 09-90

SERVICE MANUAL

DISHWASHERS

DISHWASHER

“DIVA” 45cm

Free-Standing (F. S.) Partially integrated (B. I.) Fully integrated (F. I.)

Basic characteristics

Production ZM

Solaro (MI) - ITALY

911 6xx xxx

SOI/TD - PR 1/34 599 36 09-90

SOI/TD - PR 2/34 599 36 09-90

TABLE OF CONTENTS

INTRODUCTION ................................................................................................................................................. 4

1.1 PURPOSE OF THIS SERVICE MANUAL....................................................................................................... 4

1.2 PRESENTATION........................................................................................................................................... 5

1.3 GENERAL CHARACTERISTICS....................................................................................................................6

1.4 FIELD OF APPLICATION .............................................................................................................................. 6

1.5 ELECTRONIC MODULE................................................................................................................................6

1.6 DEFINITION OF STYLINGS AND FUNCTIONS ............................................................................................. 7

1.7 STRUCTURAL CHARACTERISTICS ............................................................................................................. 9

2 STRUCTURAL CHARACTERISTICS ................................................................................................................. 10

2.1 BASE .......................................................................................................................................................... 10

2.2 DOOR......................................................................................................................................................... 10

2.3 TUB ............................................................................................................................................................ 12

2.4 HYDRAULIC SYSTEM................................................................................................................................. 13

3 HYDRAULIC AND FUNCTIONAL CHARACTERISTICS ..................................................................................... 14

3.1 WATER FILL TANK..................................................................................................................................... 15

3.2 WATER SOFTENING SYSTEM ................................................................................................................... 15

3.3 SUMP ASSEMBLY ...................................................................................................................................... 16

3.4 DRYING DUCT............................................................................................................................................ 16

4 ELECTRICAL COMPONENTS...........................................................................................................................17

4.1 TERMINAL BLOCK ..................................................................................................................................... 17

4.2 PUSHBUTTON............................................................................................................................................ 17

4.3 TIMER......................................................................................................................................................... 17

4.4 LATCH ASSEMBLY..................................................................................................................................... 17

4.5 WASHING PUMP........................................................................................................................................ 18

4.6 CAPACITOR ...............................................................................................................................................18

4.7 DRAIN PUMP.............................................................................................................................................. 18

4.8 FILL SOLENOID VALVE.............................................................................................................................. 18

4.9 TUBE-ENCASED HEATING ELEMENT .......................................................................................................19

4.10 TEMPERATURE THERMOSTAT ................................................................................................................ 19

4.11 TEMPERATURE SENSOR.......................................................................................................................... 19

4.12 TEMPERATURE SENSOR + TURBIDITY SENSOR..................................................................................... 19

4.13 INTEGRATED DISPENSER......................................................................................................................... 20

4.14 LEVEL & ANTI-OVERFLOW PRESSURE SWITCH...................................................................................... 20

4.15 ANTI-FLOODING DEVICE...........................................................................................................................20

5 WASHING SYSTEM..........................................................................................................................................21

5.1 DEFINITION OF THE WASHING CYCLE..................................................................................................... 21

6 HYDRAULIC CIRCUIT....................................................................................................................................... 22

6.1 PATH OF WATER INTAKE - "SHORT TANK" .............................................................................................. 22

6.2 PATH OF WATER INTAKE - "LONG TANK"................................................................................................. 23

6.3 WATER FILL SYSTEM - FUNCTIONAL DESCRIPTION ............................................................................... 24

6.4 ANTI-OVERFLOW SAFETY LEVEL............................................................................................................. 24

6.5 WATER SOFTENING SYSTEM ................................................................................................................... 25

6.6 DEFINITION OF THE REGENERATION SYSTEM ....................................................................................... 27

7 DEFINITION OF THE DRYING CIRCUIT ...........................................................................................................28

7.1 "NORMAL - DRY" DRYING.......................................................................................................................... 28

7.2 "ACTIVE - DRY" DRYING............................................................................................................................ 29

7.3 "TURBO - DRY" DRYING SYSTEM .............................................................................................................30

7.4 CHECKING THE EFFICIENCY OF THE COMPONENTS ............................................................................. 31

7.5 ELECTRICAL CIRCUIT DIAGRAM - DIVA_ ELM -........................................................................................ 32

7.6 BASIC ELECTRICAL DIAGRAM - DIVA_ ELM - ........................................................................................... 33

7.7 TIMER DIAGRAM - DIVA_........................................................................................................................... 34

SOI/TD - PR 3/34 599 36 09-90

1 INTRODUCTION

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 information of a general nature regarding the new 45 "DIVA" range of dishwashers.

The aspects described in this document relative to the structural and hydraulic characteristics and the basic circuits are common to all the appliances in the range, both with electromechanical and electronic control systems.

More detailed information regarding individual models may be found in the specific information documents for each specific functionality.

This information covers:

- Technical characteristics

- Circuit diagrams

- Exploded diagrams and Lists of spare parts

may be found in the Service Notes and Service Manuals issued separately for each specific model.

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1.2 PRESENTATION

NEW TECHNOLOGY: DISHWASHERS CREATED WITH COMPUTER-AIDED DESIGN SYSTEMS

AND BUILT USING MODERN INDUSTRIAL TECHNOLOGY.

RESULT:

Drawing on our vast experience and resources, combined with the latest technical and structural techniques, we have produced this range of innovative appliances to meet the demands of a market that is constantly evolving.

1.2.1 MAIN CHARACTERISTICS

1.2.1.1 STRUCTURAL CHARACTERISTICS:

- Modular and convertible, in three versions: Free-standing, Partially built-in, Fully built-in

- Monobloc load-bearing base in sound-absorbing plastic material.

- Two removable side panels.

- Styling variable to meet the various configurations requested.

- Simplification of free-standing and built-in installation.

- On built-in models, the rear foot can be adjusted from the front of the appliance.

1.2.1.2 HYDRAULIC CHARACTERISTICS:

- Newly-designed integrated hydraulic circuit.

- New integrated sump.

- New water softening system.

- Softening of regeneration water up to 90°F - 50°D.

- Optimization of the regeneration system with 5 to 10 levels of regeneration.

- Manual regulation of the regeneration level on electromechanical models, software regulation for electronic models.

1.2.1.3 ELECTRICAL CHARACTERISTICS:

- New washing pump motor.

- New drain pump motor.

- New types of timer.

- New types of electronic boards (PCB).

1.2.1.4 CONTROL AND SAFETY SYSTEMS:

- Measurement of water temperature by means of thermostats or temperature sensors for electronic models.

- Measurement of water fill level by means of a pressure switch.

- Anti-overflow safety system using a pressure switch.

- Anti-leakage safety system using an anti-flooding device.

- Protection against overheating using a safety thermostat (software for electronic models).

- Electrical door aperture safety system.

- Functional protection with constant monitoring (with software control for electronic models).

1.2.1.5 SOUND-PROOFING:

- Improved silence thanks to the use of new materials and new construction technologies.

1.2.1.6 SERVICE:

- Easier access to components thanks to careful positioning, from the two removable side panels and from the frontal plinth.

Electronic models:

- Facilitation of repairs using diagnostics tests and trouble-shooting procedures.

- The washing parameters can be modified to improve washing performance.

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1.3 GENERAL CHARACTERISTICS

Power supply ⇒ 230 V / 50 Hz (limits 187−254 V) Total power absorption ⇒ 2300 W (with 2100 W heating element) Water supply ⇒ Min. / Max. Pressures: 5 − 80 N/cm

Load capacity ⇒ 8/9 place settings Noise level ⇒ db 50 / 56 (A) sound pressure (electromechanical)

⇒ db 46 / 50 (A) sound pressure (electronic) Class ⇒ [AAA] - [AAB] (electronic models)

* Declared consumption [BIO AAB programmes]

- Water - Energy - Duration of cycle ⇒ 14Lt. - 1,10 KWh - 150 Min

* Example of programme declared to the various consumer institutes (electronic models).

1.4 FIELD OF APPLICATION

Washing system ⇒ CONTINUOUS (electromechanical) ⇒ CONTINUOUS /IMPULSE OPERATION (electronic)

Control system ⇒ TIMER (electromechanical) ⇒ CONTROL BOARD (electronic)

Water fill level ⇒ PRESSURE SWITCH CONTROL (electromechanical) ⇒ PRESSURE SWITCH+SOFTWARE CONTROL (electronic)

Water heating ⇒ HEATING ELEMENT IN PROTECTIVE TUBE

Temperature control ⇒ THERMOSTATS (electromechanical) ⇒ NTC TEMPERATURE SENSOR (electronic)

Drying system ⇒ NORMAL DRY (electromechanical) ⇒ ACTIVE DRY (electronic)

⇒ TURBO DRY (electronic)

Safety systems ⇒ HYDRAULIC/ELECTRICAL SYSTEMS (electromechanical) ⇒ TOTAL PROTECTION: HYDRAULIC/ELECTRICAL +

SOFTWARE (electronic)

Alarms ⇒ SOFTWARE SYSTEM WITH VISUAL DISPLAY (electronic)

1.5 ELECTRONIC MODULE

Power board ⇒ MAIN OPERATIONAL CONTROL (built-in microprocessor)

Comandi / Visualizzazione ⇒ USER-MACHINE INTERFACE

SOI/TD - PR 6/34 599 36 09-90

1.6 DEFINITION OF STYLINGS AND FUNCTIONS

1.6.1 Control panel: - DIVA_ ELM [electromechanical] PNC 911 6

Ö Option keys Ö Salt level indicator Ö Programme selector knob Ö ON/OFF key

1.6.1.1 DEFINITION OF FUNCTIONS

Structure Function Type of control Programmes Options

1>3 1>4 xxx

Free- Standing / Built- in

Electro-

mechanical

ON/OFF key

> 3 keys

+ knob

> 6

programmes

[Temp. selection 70ºC, 60ºC,

50ºC] - [Intensive] - [Bio/Eco] -

1.6.2 Control panel: - DIVA_ EDW1100 PNC 911 6

Control panel versions Ö HORIZONTAL Ö VERTICAL

Structure

Free- Standing / Built- in

Electronic Functions

EDW_1001

Type of control Programmes Options

ON/OFF key

> 6_keys / leds

3 > 6

programmes

[Delay /9h] - [ ½C] - [Tablet (3/1)]

1.6.3 Control panel: - DIVA_ EDW1003 PNC 911 6

Control panel versions Ö UPPER / HORIZONTAL

Structure

Fully built-in EDW_1003

Electronic Functions

Type of control Programmes Options

ON/OFF key

> 6 keys / LEDs

> 6

programmes

[Delay /9h] - [ ½C] - [Tablet (3/1)]

[½C] -

1>2 5 xxx

3 5 xxx

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1.6.4 Control panel: - DIVA_ EDW1500 PNC 911 6 1>2 6 xxx

Control panel versions Ö HORIZONTAL Ö VERTICAL

Structure

Free- Standing / Built- in

Electronic Functions

EDW_1500

Type of control Programmes Options

ON/OFF key

3 >

6 keys / LEDs

+ display

> 6

programmes

[Delay /19h] - [ ½C] - [Tablet (3/1)]

1.6.5 Control panel: - DIVA_ EDW1503 PNC 911 6

3 6 xxx

Control panel versions Ö UPPER / HORIZONTAL

Structure

Fully built-in EDW_1503

Electronic Functions

Type of control Programmes Options

ON/OFF key

3 >

6_ keys / LEDs

+ display

> 6_

programmes

[Delay /19h] - [ ½C] - [Tablet (3/1)]

1.6.6 Control panel: - DIVA_ EDW2000 PNC 911 6

1>2 7 xxx

Control panel versions Ö FRONTAL / HORIZONTAL

Structure

Free- Standing / Built- in

Electronic Functions

EDW_2000

Type of control Programmes Options

ON/OFF key

11 keys /

+ display

LEDs

6 [Delay /19h] - [ ½C] - [Tablet (3/1)]

SOI/TD - PR 8/34 599 36 09-90

1.7 STRUCTURAL CHARACTERISTICS

This convertible modular dishwasher is designed for maximum flexibility, and can be installed in the FREE-STANDING or BUILT-IN versions.

FREE-STANDING BUILT-IN

Ø Ø

1.7.1 INTERNAL CHARACTERISTICS

1. Upper basket guide

2. Water softening level selector

3. Salt container cap

4. Detergent/rinse-aid dispenser

5. Control panel

6. Serial number plate

7. Central filter (drain)

8. Main filter (washing)

9. Lower spray arm

10. Upper spray arm

11. Upper basket

12. Work-top (free-standing versions only)

By removing the work top, the dishwasher can be inserted beneath a sink or a pre-existing work-top in marble or wood, on condition that the dimensions of the compartment are as shown in the figure.

6 7 8 5 4 3

SOI/TD - PR 9/34 599 36 09-90

2 STRUCTURAL CHARACTERISTICS

The appliance consists of four main assemblies:

2.1 BASE

2.2 DOOR

2.2.1 CONTROL PANEL

2.2.2 INNER DOOR

2.2.3 DOOR

- BASE - DOOR - TUB - HYDRAULIC SYSTEM

These four assemblies are enclosed in a cabinet designed with the following removable parts:

- Front panel (secured by two screws)

- Two side panels (secured by six screws)

- A work-top (free-standing versions only) secured to the structure by two screws at the rear.

The specially-shaped base is moulded in sound-absorbing plastic material.

- The base, which supports the body of the appliance, is fixed structurally to the tub.

The following components are located in the base

- The fill valve

- The integrated terminal block, power cable and anti-interference capacitor

- The washing pump capacitor

- The anti-flooding device

- The support system (rubber support blocks) for the washing pump

- The counterweight (free-standing versions only)

The door consists of the following sub-assemblies:

The control panel is in moulded plastic, and is secured to the inner door by six self-tapping screws. The control panel may be customized for the various stylings, with different colours and silk-screened markings, or by the application of a transparent or stainless steel panel mask.

The following components are screwed or pressure-fitted to the inside of the control panel:

- The timer or electronic board

- The door aperture handle

- The pushbutton array

- The pilot lamp diffusers.

The inner door is in non-magnetic 304 stainless steel, and is secured by two lateral hinges (using four screws), which are secured to the two front uprights of the tub.

The following components are fitted to the interior of the inner door:

- The door latch with a built-in door aperture microswitch

- The integrated dispenser (detergent and rinse-aid)

- In the lower section, a seal with the bottom of the tub.

The door is in enamelled sheet steel, and is secured to the inner door by six screws around the perimeter and two lateral screws. On certain stylings (free-standing) a perimetral surround is fitted for application of a front décor panel. The doors of built-in appliances have holes, slots and shaped sections for application of an outer door in wood.

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2.2.4 DOOR HINGE

In galvanized pressed steel, with a series of mechanisms (springs, levers, spindles) which form the system of movement for aperture/closure of the door.

- Secured externally to the two lateral uprights (D) by pressure-fitted couplings and screws with metric thread.

- Hinges with different functional characteristics and settings are used, depending on the styling of the appliance.

2.2.4.1 CHARACTERISTICS & FUNCTIONS Aperture and closure of the door is by means of a pair of self-adjusting hinges (A) and a tensioning spring (B). The movement is self-balancing and features an automatic "braking

" system.

The self-balancing system consists of a helical spring which is calibrated to a fixed setting.

- The calibration depends on the overall weight of the door fitted to the

appliance.

- The helical spring is secured to the upper extremity of the upright

and to the hinge mechanism.

The automatic "braking

" system consists of a mechanical clutch.

- The clutch consists of a sliding element (C) fitted to the hinge

mechanism which, during aperture and closure of the door, slides vertically along the surface of the hinge.

- Some hinges are fitted with a double clutch system (two sliding

elements) in order to provide a greater "braking" effect, so that doors of greater weight are balanced in the same way.

2.2.4.2 OPERATION AND CALIBRATION

In order to cover the entire range according to the overall weight of the door (from 5.5 kg min. to 14.2 kg max.), a series of combinations has been created, and consists of three types of hinge and five types of spring. According to the possible combinations of hinges and springs, the characteristics of the hinge/spring assemblies

Dishwasher

structure

Type of

hinge (C)

are shown in the table below:

Type of

spring

(B)

Weight of

panel/door

Ä Ä Ä Ä Ä

FreeStanding FreeStanding

Single

clutch

Single

clutch

Light

(blue mark)

Normal

(no mark)

-- 5,5 > 6,5 Kg

> 2 Kg 6 > 8,9 Kg

Ä Ä Ä Ä Ä

FreeStanding

Built- in

Double

clutch

Double

clutch

Light

(red mark)

Normal

(no mark)

> 5,5 Kg 6,4 > 12,3 Kg

2 > 7,5 Kg 7,9 > 14,2 Kg

Ä Ä Ä Ä Ä

Double

Built- in

clutch

(*) Variable

fulcrum

(*) The dual-action hinge (simultaneous aperture and lifting of the door) facilitates built-in installation, since there is no interference with the plinth. It is not necessary to cut the plinth to allow rotation of the door panel.

Normal

(no mark)

2 > 7,5 Kg 7,9 > 14,2 Kg

Total weight of

door

SOI/TD - PR 11/34 599 36 09-90

+ 23 hidden pages