Wascomat W620 Classic, Service Manual

Page: 68 / 132

29
29. Door and door lock
4
Service
Manual
Fig.
3
3
Function
The door lock locks the door
When the door is closed (closed door lock switch
S3), the programme unit may request door
locking by applying a voltage of 110-240 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 X93 from level
guard B2 is closed = 0 V
• Mot or not engaged - input X94 from motor
control A107 open = 5 V
• Drum not turning - no pulses on input X95
from rotation sensor B3.
When the above conditions are met, the card
A31 outputs a closing pulse on output X96 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 switches on the programme unit.
The switches control the machine’s drain and
water valves as well as heater switch-on.
• Interlock signal enables motor operation.
Programme operation is now possible.
Door lock
control
A31
Level
guard
B2
M1
Door lock
A41
Programme
unit A1
X92
X31
X96 X95 X93
X30
X94
Motor
module
A107
Rotation sensor B3
X304
X302
X27
5191 B
X24