The Door Lock Locks The Door - Electrolux W4400H Service Manual

The door lock locks the door
When the door is closed (closed door lock
3
switch S), the programme unit may request
door locking by applying a voltage of 200-
240 V on door lock controller A1 input X92.
The following check is made by the A1 card
prior to locking of the door:
• No water in drum - input X9 from level
guard B2 is closed = 0 V
• Motor not engaged - input X94 from motor
control U1 open = 5 V
• Drum not rotating - pulse frequency on
input X95 from rotation sensor B less than
0.4 Hz.
When the above conditions are met, the card
A1 outputs a positive pulse on output X96 to
the door lock actuator, which then locks the
door. The micro switches S4a and S4b in the
actuator are closed when the door is locked.
These micro switches feed voltage to:
• The output relays on I/O card 1. The relays
govern the machine's drain and water valves
as well as heater switch-on.
• Interlock signal for motor control (input
X02 via I/O card 1) that releases the motor
start prevention state.
Programme operation is now possible.
Door and door lock
3
Door lock
control A1
X92
X9 X94 X96
X95
Level gu-
Motor
X04
ard B2
control U1
M1
Rotation sensor B
151
Programme unit
A1
I/O card
X4
A11
X5
X10
X02
Door lock
A41
5225