Electrolux WE170P, Service Manual, Page: 43 / 85

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10.14 Door lock safety interlock
10.14.1 General characteristics
The instantaneous door interlock allows the door to be opened as soon as the drum stops.
If the conditions described further are met.
In appliances with a drum light, a door safety interlock is fitted with an integrated switch (piloted via a slide
from the door latch). The information about the position of the switch is sent to the main circuit board and
consequently powers the LED or not.
1 Main circuit board
2 Door safety interlock (with micro-switch for the drum
light – WE170P/V)
10.14.2 Operating principle
1. Solenoid protection PTC
2. Solenoid
3. Lifting assembly
4. Cam
5. PTC - bi-metal
6. Electrical contacts (main switch)
7. Ratchet

When the programme starts (start/pause button), the main circuit board sends a voltage pulse, lasting
20 msec, to the solenoid (at least 6 seconds must have passed since the appliance was turned on),
which turns the position of the cam: the ratchet which locks the cursor of the door safety interlock is
raised and simultaneously closes the contacts of the main switch, which powers all the appliance
components.

When the programme ends, the circuit board sends two additional 20 msec pulses (200 msec apart):
-
the first pulse moves the cam by another position, without releasing the ratchet.