Technical Support - MDM
4/104
599 77 39-16 Rev. 00
11.2
Display board ................................................................................................................................... 42
11.3
Drainage pump................................................................................................................................. 43
11.3.1
General characteristics .............................................................................................................. 43
11.4
Heating element ............................................................................................................................... 44
11.4.1
General characteristics .............................................................................................................. 44
11.5
Temperature probe........................................................................................................................... 45
11.5.1
General characteristics .............................................................................................................. 45
11.6
Analogue pressure switch................................................................................................................. 46
11.6.1
General characteristics .............................................................................................................. 46
11.7
Door safety interlock PTO (Pull To Open) ......................................................................................... 47
11.7.1
General characteristics .............................................................................................................. 47
11.7.2
Operating principle .................................................................................................................... 47
11.7.2.1
Mechanical operation.......................................................................................................... 48
11.7.3
Manual opening of the appliance door........................................................................................ 49
11.8
Universal motor ................................................................................................................................ 50
11.8.1
General characteristics .............................................................................................................. 50
11.8.2
Operating principle .................................................................................................................... 50
11.8.2.1
Motor speed control ............................................................................................................ 50
11.8.2.2
Direction of rotation of the motor ......................................................................................... 51
11.8.2.3
Tachometric generator........................................................................................................ 51
11.8.3
Power supply to motor ............................................................................................................... 52
11.9
Three-phase asynchronous motor – Inverter..................................................................................... 53
11.9.1
General characteristics .............................................................................................................. 53
11.9.2
Power supply to motor ............................................................................................................... 53
11.10
Inverter............................................................................................................................................. 54
11.10.1
General characteristics .............................................................................................................. 54
11.11
Anti-foam control system .................................................................................................................. 55
11.12
Solenoid valves ................................................................................................................................ 56
11.12.1
General characteristics .............................................................................................................. 56
11.12.2
Operating principle .................................................................................................................... 56
11.12.3
Mechanical jamming of the solenoid valve ................................................................................. 56
11.12.4
Low water pressure ................................................................................................................... 56
12
ALARM SUMMARY TABLE ................................................................................................................. 57
13
DIAGRAMS.......................................................................................................................................... 61
13.1
Operating Circuit Diagram EWX13611 (with universal motor)............................................................ 61
13.2
Key to operating circuit diagram EWX13611 (with universal motor) ................................................... 62
13.3
Operating Circuit Diagram EWX11831 (with three-phase motor) ....................................................... 63
13.4
Key to operating circuit diagram EWX11831 (with three-phase motor) .............................................. 64
14
ACCESSIBILITY (appliances with universal motor) .............................................................................. 65
14.1
Worktop............................................................................................................................................ 65
14.2
From the worktop, you can access.................................................................................................... 65
14.2.1
Main board ................................................................................................................................ 65
14.2.2
Solenoid valve ........................................................................................................................... 68
14.2.3
Display board assembly............................................................................................................. 68
14.2.4
Control panel ............................................................................................................................. 70
14.2.5
Analogue pressure switch .......................................................................................................... 73
14.2.6
Detergent dispenser .................................................................................................................. 74
14.2.7
Upper counterweight.................................................................................................................. 75
14.3
Accessing the front part .................................................................................................................... 76
14.3.1
Door hinge – Door ..................................................................................................................... 76
14.3.2
Door safety interlock.................................................................................................................. 76
14.3.3
Blade......................................................................................................................................... 79
14.3.4
Front panel ................................................................................................................................ 81
14.4
From the front panel, you can access ............................................................................................... 82
14.4.1
Front counterweight ................................................................................................................... 82
14.4.2
Bellow seal ................................................................................................................................ 82
14.4.3
Welded tub assembly ................................................................................................................ 82
14.4.4
Tub suspension springs............................................................................................................. 83
14.5
Accessing the rear part..................................................................................................................... 84
14.5.1
Back panel ................................................................................................................................ 84
14.6
From the back panel, you can access ............................................................................................... 84
14.6.1
Belt............................................................................................................................................ 84
14.6.2
Plastic pulley (Ø 273 mm).......................................................................................................... 85
14.6.3
Motor........................................................................................................................................85
14.6.4
Heating...................................................................................................................................... 85
14.7
From the base of the appliance, you can access............................................................................... 86