Electrolux LAUNDRY Service Manual page 4

5.2.2 Electrical symbol ...................................................................................................................... 34
5.2.3 Checking for efficiency ............................................................................................................. 34
5.3 Door safety interlock (traditional version) ........................................................................................ 35
5.3.1 General characteristics ............................................................................................................ 35
5.3.2 Electrical symbol ...................................................................................................................... 35
5.3.3 Circuit diagrams ....................................................................................................................... 35
5.3.4 Checking for efficiency ............................................................................................................. 36
5.4 Instantaneous door safety interlock ................................................................................................. 36
5.4.1 General characteristics ............................................................................................................ 36
5.4.2 Operating principle ................................................................................................................... 36
5.4.2.1 "Door open" conditions....................................................................................................... 37
5.4.2.2 Automatic release device ................................................................................................... 37
5.4.2.3 Protective cut-out for solenoid valve .................................................................................. 37
5.4.3 Electrical symbol ...................................................................................................................... 37
5.4.4 Circuit diagram ......................................................................................................................... 37
5.5 Solenoid valve.................................................................................................................................. 38
5.5.1 General characteristics ........................................................................................................... 38
5.5.2 Electrical symbol ...................................................................................................................... 38
5.5.3 Checking for efficiency ............................................................................................................. 38
5.6 Pressure switch................................................................................................................................ 39
5.6.1 General characteristics ............................................................................................................ 39
5.6.2 Pressure switch hydraulic circuit.............................................................................................. 39
5.6.3 Operating principle ................................................................................................................... 40
5.6.4 Electrical symbol ...................................................................................................................... 40
5.6.5 Circuit diagram ......................................................................................................................... 40
5.6.6 Checking for efficiency ............................................................................................................. 40
5.7 Analogue (electronic) pressure switch............................................................................................. 41
5.7.1 General characteristics ............................................................................................................ 41
5.7.2 Operating principle ................................................................................................................... 41
5.7.3 Electrical symbol ...................................................................................................................... 42
5.7.4 Circuit diagrams and operating frequency ............................................................................... 42
5.7.5 Checking for efficiency ............................................................................................................. 42
5.8 Commutator motor ........................................................................................................................... 43
5.8.1 General characteristics ............................................................................................................ 43
5.8.2 Operating principle ................................................................................................................... 43
5.8.2.1 Control of the speed of the motor....................................................................................... 44
5.8.2.2 Direction of motor rotation .................................................................................................. 44
5.8.2.3 Tachymetric generator ....................................................................................................... 45
5.8.3 Electrical symbols .................................................................................................................... 45
5.8.4 Circuit diagram ......................................................................................................................... 46
5.8.5 Checking for efficiency ............................................................................................................. 46
5.9 Induction motors (asynchronous) .................................................................................................... 47
5.9.1 General characteristics ............................................................................................................ 47
5.9.2 Operating principle ................................................................................................................... 47
5.9.3 Checking the efficiency ............................................................................................................ 47
5.10 Inverter (if featured) ......................................................................................................................... 48
5.11 Heating element............................................................................................................................... 49
5.11.1 General characteristics ............................................................................................................ 49
5.11.2 Electrical symbol ...................................................................................................................... 49
5.11.3 Checking for efficiency ............................................................................................................. 49
5.12 NTC temperature sensor (incorporated in the heating element) ..................................................... 50
5.12.1 General characteristics ............................................................................................................ 50
5.12.2 Electrical symbol ...................................................................................................................... 50
5.12.3 Checking for efficiency ............................................................................................................. 50
5.13 Drain pump ...................................................................................................................................... 51
5.13.1 General characteristics ............................................................................................................ 51
5.13.2 Electrical symbol ...................................................................................................................... 51
5.13.3 Checking for efficiency ............................................................................................................. 51
5.14 Water control (if featured) ................................................................................................................ 52
5.15 Circulation pump (if featured) .......................................................................................................... 53
5.15.1 General characteristics ............................................................................................................ 53
5.15.2 Electrical symbol ...................................................................................................................... 53
5.15.3 Checking for efficiency ............................................................................................................. 53
5.16 Circuit diagrams ............................................................................................................................... 54
5.16.1 Wiring diagram ......................................................................................................................... 54
SOI/DT 2006-01 dmm
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