Page 63
Electrical tests
Service Manual Deli Multisserie form 9123560 rev. 02/2017
Working principle.
The 3 way valve is turned into the drain (sewer) posi-
tion at the moment that the cleaning program is
started. Waste water goes into the sewer.
As soon as the cleaning program ends or is interrupted,
the valve is turned into opposite direction back to
the default cooking position. Grease wil go down
into the container.
The cooking position is activated by output X3 on the
slave I/O board. (relay in OFF position)
As soon as the cooking position is reached, the contact
inside the motor housing disconnects the motor and
activates relay K7.
The contact of relay K7 closes and connects terminal
X30 to X31 on the Pwr and I/O board. This is the
feed back signal for the processor that the valve
reached the cooking position
The cleaning position is activated by output X4 on the
slave I/O board. (relay ON). When in position, the
motor contact activates relay K8, the contact of K8
closes and connects terminal X16 to X17.
A 7-core cable provides the power and the signal wires
for the 3 way valve.
Note that wire nr 2 is not used. It has been cut out the
cable. The terminal block inside the motor housing
has the same numbers as the wires inside the cable.
Passive measurements
(resistance)
Disconnect the mains supply first!
The picture overview shows which measurements can
be expected without disconnecting wires.
Disconnect wire “1” from the terminalblock (TB2-1) for
further measurements!
The 3 way valve in cooking position.
(normal position)
Between 1 and 3
∞
Ω
Between 1 and 4
5000 Ω (Motor of valve)
Between 3 and 4
∞
Ω
Between 3 and 5
± 0 Ω (Feed back signal)
Between 4 and 6
∞
Ω
The 3 way valve in cleaning position.
Between 1 and 3
5000 Ω (Motor of valve)
Between 1 and 4
∞
Ω
Between 3 and 4
∞
Ω
Between 3 and 5
∞
Ω
Between 4 and 6
± 0 Ω (Feed back signal)
The 3w. valve in between cooking and cleaning pos.
Between 1 and 3
5000-6000 Ω (Motor of valve)
Between 1 and 4
5000-6000 Ω (Motor of valve)
Between 3 and 4
1000-1200
Ω (Motor of valve)
Between 3 and 5
∞
Ω
Between 4 and 6
∞
Ω
Note that the resistances of the motor can reach 6000Ω
and 1200 Ω after a run. The motor is thermally
protected.
X30
X31
X17
X16
11
14
21
24
K7
K8
54
53
98
95
drain
cooking
pos.
pos.
cleaning
drain
5V
Power and I/O board
MEASURING ON THE 3 WAY VALVE
X4
X3
drain valve
cooking
pos.
cleaning
pos.
M4
50
48
36
A2
A1
4
3
A2
K8
1
K7
5
6
A1
107
101
101
TB2-1
TB2-2
TB2-3
Slave board
X10
38
39
X11
N
L
40
X3
X4
50
48
X16
X17
X30
X31
54
53
98
95
1 3 4
5
6
PE
101
107
54
53
95
98
101
36 48 50
Note that wire
nr. 3 is on terminal 2
and wire
nr 4 on terminal 3!!!
K7 K8
TB2
± 5kΩ
± 5kΩ
50-200Ω
± 36kΩ
± 0 Ω
± 36kΩ
± 36kΩ
± 0 Ω
Cooking position->
Cleaning position->
± 36kΩ
Cooking position->
Cleaning position->
Typical resistance
values without dis-
connecting wires!
