SOI/DT 2007-02 dmm 36/56 599 38 60-23
10.2 Door interlock
There are two types of door interlock:
• voltmetric with PTC
• instantaneous
10.2.1 Voltmetric interlock with PTC
10 Suppressor
19 Door interlock
20 PCB
ON/OFF = Main switch (programme
selector)
10.2.1.1 Operating principle
ª When the washing programme is started by pressing the START/PAUSE button, the bi-metal PTC (contacts
3-5) is powered by the triac on the PCB: after 2 – 4 seconds, this closes the switch (5-4) which powers the
electrical components of the appliance (only if the door is closed).
ª The door interlock prevents aperture of the door while the appliance is in operation.
ª At the end of the washing programme, the PCB disconnects the interlock from the power supply, but the
door remains locked for 1 to 3 minutes (PTC cooling time).
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