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 connectors used are J6-2
(neutral) and J10-1 (line).
The control/display board (4) is powered
at 5V by the main board: the buttons can
therefore be used for selection of the
programmes and the options.

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 closed pilot lamp
•
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 (connector J6-2): 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 2005-07 dmm 36/59 599 37 22-15