CONTENTS 1 PURPOSE OF THIS SERVICE MANUAL .............................................................................................. 6 2 IMPORTANT NOTES ............................................................................................................................. 6 3 WASHING PRINCIPLES ........................................................................................................................ 7 3.1 Washing.............................................................................................................................................
7 3.1.1 Results of the wash.................................................................................................................... 7 3.2 Fabrics ............................................................................................................................................... 8 3.2.1 Natural and artificial fibres.......................................................................................................... 8 3.2.2 Washing the various types of fibres...........................................................................................
8 3.2.3 Washing animal fibres:............................................................................................................... 8 3.2.4 International symbols for washing of fabrics.............................................................................. 9 3.3 Classification of soiling .................................................................................................................... 10 3.4 Mechanical action ............................................................................................................................
10 3.5 Duration of the washing cycle.......................................................................................................... 10 3.6 Water ............................................................................................................................................... 11 3.6.1 Formation of lime scale and ferrous oxide............................................................................... 11 3.6.2 Hardness of the water..............................................................................................................
11 3.6.3 Total water hardness................................................................................................................ 12 3.7 Detergents ....................................................................................................................................... 13 3.7.1 Composition of a detergent...................................................................................................... 13 3.7.2 Functions of the principal components of a detergent............................................................. 13 3.7.3 Functions of other components of a detergent ........................................................................
14 3.7.4 Detergent quantities................................................................................................................. 15 3.7.5 Washing additives.................................................................................................................... 16 3.7.6 Bleaching.................................................................................................................................. 16 3.8 The function of the water temperature.............................................................................................
17 3.8.1 Using the correct temperature..................................................................................................17 3.9 Washing machine programmes....................................................................................................... 18 4 FRONT-LOADING WASHING MACHINE “HEC” ............................................................................ 19 4.1 Washing system............................................................................................................................... 19 4.1.1 “ECO-BALL” ball valve.............................................................................................................
20 4.1.1.1 Ball valve: operating principle ............................................................................................20 4.1.2 “JETSYSTEM” washing system............................................................................................... 21 4.1.2.1 JETSYSTEM Hydraulic circuit............................................................................................21 4.2 Cabinet.............................................................................................................................................
22 4.3 Door ................................................................................................................................................. 22 4.3.1 Handle assembly...................................................................................................................... 22 4.4 Control panels.................................................................................................................................. 23 4.4.1 Examples of control panels......................................................................................................
23 4.5 Washing groups............................................................................................................................... 24 4.5.1 Types of washing groups ......................................................................................................... 24 4.5.2 Washing group .........................................................................................................................
25 4.5.2.1 Support for bearings...........................................................................................................25 4.5.2.2 Drum...................................................................................................................................26 4.5.2.3 Damper...............................................................................................................................26 4.5.2.4 Drum rotation drive belt......................................................................................................27 4.6 Detergent dispenser.........................................................................................................................
28 4.6.1 Detergent dispenser with multiple-outlet solenoid valve..........................................................
28 4.6.1.1 Operating principle of 3-compartment duct........................................................................29 4.6.1.2 3-compartment drawer .......................................................................................................29 4.6.1.3 Operating principle of 4-compartment duct........................................................................30 4.6.1.4 3-compartment drawer .......................................................................................................30 4.7 Washing machine with traditional washing system and “ECO-BALL” ball valve.............................
31 4.8 “NEW JET” circulation circuit........................................................................................................... 31 4.8.1 Drain filter................................................................................................................................. 31 5 ELECTRICAL COMPONENTS............................................................................................................. 32 5.1 Suppressor.......................................................................................................................................
32 5.1.1 General characteristics ............................................................................................................ 32 5.1.2 Electrical symbols .................................................................................................................... 32 5.1.3 Circuit diagrams ....................................................................................................................... 32 5.1.4 Checking for efficiency.............................................................................................................
32 5.2 Push-button...................................................................................................................................... 33 SOI/DT 2006-03 dmm 3/70 599 37 67-82