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5.5
Pressure switch ................................................................................................................................ 36
5.5.1
General characteristics.............................................................................................................. 36
5.5.2
Pressure switch hydraulic circuit ............................................................................................... 36
5.5.3
Electrical symbol........................................................................................................................ 37
5.5.4
Circuit diagram .......................................................................................................................... 37
5.5.5
Checking for efficiency .............................................................................................................. 37
5.6
Analogue (electronic) pressure switch.............................................................................................. 38
5.6.1
General characteristics.............................................................................................................. 38
5.6.2
Operating principle .................................................................................................................... 38
5.6.3
Electrical symbol........................................................................................................................ 39
5.6.4
Circuit diagrams and operating frequency................................................................................. 39
5.6.5
Checking for efficiency .............................................................................................................. 39
5.7
Induction (asynchronous) motors ..................................................................................................... 40
5.7.1
General characteristics.............................................................................................................. 40
5.7.2
Operating principle .................................................................................................................... 40
5.7.3
Checking the efficiency.............................................................................................................. 40
5.8
Commutator motor............................................................................................................................ 41
5.8.1
General characteristics............................................................................................................. 41
5.8.2
Operating principle .................................................................................................................... 41
5.8.3
Electrical symbols...................................................................................................................... 43
5.8.4
Circuit diagram .......................................................................................................................... 44
5.8.5
Checking for efficiency .............................................................................................................. 44
5.9
Heating element................................................................................................................................ 45
5.9.1
General characteristics.............................................................................................................. 45
5.9.2
Electrical symbol........................................................................................................................ 45
5.9.3
Checking for efficiency .............................................................................................................. 45
5.10
NTC temperature sensor integrated in the heating element......................................................... 46
5.10.1
General characteristics.............................................................................................................. 46
5.10.2
Electrical symbol........................................................................................................................ 46
5.11
Drain pump.................................................................................................................................... 47
5.11.1
General characteristics.............................................................................................................. 47
5.11.2
Electrical symbol........................................................................................................................ 47
5.11.3
Checking for efficiency .............................................................................................................. 47
5.12
Circulation pump ........................................................................................................................... 48
5.12.1
General characteristics.............................................................................................................. 48
5.12.2
Electrical symbol........................................................................................................................ 48
5.12.3
Checking for efficiency .............................................................................................................. 48
6
ACCESS TO COMPONENTS ................................................................................................................. 49
6.1
Work-top ........................................................................................................................................... 49
6.1.1
Pressure switch ........................................................................................................................ 49
6.1.2
Suppressor ................................................................................................................................ 49
6.1.3
Solenoid valve .......................................................................................................................... 49
6.2
Control panel..................................................................................................................................... 50
6.2.1
Push-button ............................................................................................................................... 50
6.3
Electronic control .............................................................................................................................. 50
6.3.1
Main electronic control (EWM2000EVO-EWM3000NEW) ........................................................ 50
6.3.2
Control/display board................................................................................................................. 51
6.3.3
Electronic pressure switch......................................................................................................... 51
6.4
Access from the door........................................................................................................................ 51
6.4.1
Door ........................................................................................................................................... 51
6.4.2
Door hinge ................................................................................................................................. 51
6.4.3
Door safety interlock.................................................................................................................. 52
6.4.4
Bellow seal ................................................................................................................................ 52
6.5
Rear cabinet shell ............................................................................................................................. 53
6.5.1
Motor.......................................................................................................................................... 53
6.5.2
Heating element ........................................................................................................................ 53
6.5.3
Detergent dispenser .................................................................................................................. 54
6.5.4
Removing the duct from the dispenser...................................................................................... 54
6.5.5
Damper ...................................................................................................................................... 54
6.5.6
Drum pulley ............................................................................................................................... 55
6.5.7
Pressure chamber ..................................................................................................................... 55
6.6
Washing group.................................................................................................................................. 55
6.7
Drum and tub shells.......................................................................................................................... 55
6.7.1
Drum shaft bearings .................................................................................................................. 56
6.7.2
Drum spider ............................................................................................................................... 56
2005.11 dmm
4/60
599 37 38-46
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