Service manual

91
6659
7
6
14
K21
M1
9
1
10
11
12
13
2
E1 – E3
8
3
3
4
5
Door and door lock
The door lock unlocks the door
Theprogrammeunitrequestsdoorunlockingbyapplying0VoninputX92
of the door lock controller.
The following check is made prior to unlocking 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 is less than 0.4 Hz.
When the above conditions are met, the door lock controller outputs an
opening pulse on output D0 to the door lock actuator/coil, which then
unlocks the door. Micro switches S4a and S4b now interrupt the actuator/
door lock and the I/O card 1 relays lose all voltage to prevent the motor
from starting (interlock signal on motor controller input X302). The drain
and water valves of the machine are now disabled and the heater and mo-
tor cannot be switched on.
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
8. Rotation sensor B3
9. Door lock module A41
 10. VoltageunitA5
11. I/O board
12. Watervalves
13. Drain valve
14. Power supply PSU
3