Function - Electrolux W465H Service Manual

90

Function

The door lock locks the door
When the door is closed (closed door lock switch S3), the programme unit
2
may request door locking by applying a voltage of 200-240 V on the door
lock controller A31 input X92.
The following check is made by the A31 card prior to locking of the door:
• No water in drum - input "level" from level guard B2 is closed = 0 V
• Drum not turning - pulse frequency on input "Tacho" from rotation
sensor B3 less than 0.4 Hz.
When the above conditions are met, the card A1 outputs a closing pulse
on output D0 to the door lock actuator/coil, which then locks the door. The
micro switches S4a and S4b in the actuator/door lock are closed when the
door is locked. These micro switches feed voltage to:
• The output relays on the programme unit card. The relays control the
machine's drain and water valves as well as heater switch-on.
• Interlock signal for motor control (input X302) that releases the motor
start prevention state.
Programme operation is now possible.
2
5
E1 – E3
6
K21
14
Door and door lock
9
7
M1
8
1. Program unit A1
2. Temperature sensor B1
3, Level switch B2
4, Level switch B4
5. Display A2
6. Heater element E1 -3
7. Motor control U1
1
10
8.
9.
10. Voltage unit A5
11.
12.
13.
14.
2 3
4
11
13
12
Rotation sensor B3
Door lock module A41
I/O board
Watervalves
Drain valve
Power supply PSU
6659