Power Supply And Programme Selection; Door Interlock; Voltmetric Interlock With Ptc - Electrolux washing machine Service Manual

7.2 Power supply and programme selection

The main board (3) is powered by the
interference suppressor (1) and by the
closure of the contacts of the main switch
(2). The affected connectors are J6-2
(neutral) and J10-1 (line).
The control/display board (4) is powered
at 5V by the main board: through the
programme selector (5) it is possible to
select the programme. The selection of
the options / start is performed through
the board buttons (4).
The buzzer (if featured) (6) is powered by
the display board.

7.3 Door interlock

There are two types of door interlock:
•
voltmetric with PTC: it is always necessary to wait from 1 to 3 minutes before opening the door.
•
instantaneous: the door can be opened as soon as the cycle ends.
7.3.1

Voltmetric interlock with PTC

1. Suppressor
2. Main switch (button or
programme selector)
3. Door interlock
4. Main PCB
5. Door pilot lamp closed
•
Operating principle
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 (J6-2 connector): after 2 – 4 seconds, this closes the
switch (5-4) which powers the electrical components of the appliance (only if the door is closed).
The door interlock prevents aperture of the door while the appliance is in operation.
At the end of the washing programme, the PCB disconnects the interlock from the power supply, but
the door remains locked for 1 to 2 minutes (PTC cooling time).
Door locked" pilot lamp
Certain models feature a pilot lamp which lights to indicate that the door is locked. This pilot lamp
switches off when the door can be opened
SOI/DT 2005-01 dmm 25 599 36 86 11