SOI/DT 2007-02 dmm
48/66
599 38 61-92
9.2 Door
interlock
There are two types of door interlock:
•
voltmetric with PTC
•
instantaneous
9.2.1 Voltmetric
interlock
with
PTC
10 Suppressor
19 Door
interlock
20 PCB
ON/OFF = Main switch (programme
selector)
9.2.1.1 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).