Service
Manual
Type
12 12. Function Sequence
12 9005
Edition Page
1554
8
1234567891011 1 2 13 14 1516 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 3839 40 4142 43 44 45 46 47 48 4950 51 52 53 54Prerinse
Drain
Mainwash Cool down
Rinse 1
Drain/
Spin
Rinse 2
Rinse 4 Tumbling
Open
Start
Prewash
Drain
Drain
Drain/
Spin
Rinse 3
Drain/
Spin
Drain/Spin
(30'')
30''
P+
L+ 1'
3''
27''
30''
P+ T+
3'
1'
1'
L+ 1'
3''
1'
1'
T+ 1'
P+ 3'
30''
27''
1'
4'
1'
1'
1'
1'
2'
T- 1'
L+ 1'
1'
P+ 1'
30''
30''
L+ 1'
P+ 1'
L+ 1'
30''
P+ 1'
30''
L+ 1'
30''
30''
1'
L+ 1'
1'
3'
3''
L+ 27''
30''
30''
3''
2'
Off/Start
P+ 1'
1a. Door solenoid open
1b. Door solenoid close
10b. Doorlock
Sequence diagram

Safety Lock

The machine can not be started until the door is closed. When the start

button on the machine is pressed, or the correct number of coins are

inserted into the coin meter, the timer advances to stage 1. Row 1b (1) then

closes and the solenoid which locks the door (4) receives voltage. When

the lock piston has locked the door, the delay unit switch (6) closes and

point C receives voltage. It is only then that the drum can begin to

revolve and water begin to fill.

At program stage 1, row 10b (2) closes up which means that the bimetal

spring in the delay unit heats up. Once the spring is heated, the delay unit

holds the door locked. Row 10b is closed during the entire wash program.

In the case of a power failure, it takes approx. 2 minutes for the delay unit

spring to cool down and the door to open. This is a security measure that

guarantees the drum has ample time to stop and that water can drain (the

drain valve opens automatically in the event of a power failure).

During the last phase of the tumble cycle (program stage 49 -51) row 10b

(2) opens. When the program is completed (program stage 52), row 1a (1)

opens and the solenoid which opens the lock (3) withdraws the lock piston

so that the door can be opened immediately. This program stage lasts 2

minutes. During this time and the time allotted to stages 49 -51, the delay

unit is able to cool down enough so that the door does not lock when row

1a opens after 2 minutes.