Fri-Jado Deli Multisserie, Руководство по обслуживанию

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ELECTRICAL TESTS
Page 65
Service Manual Deli Multisserie form 9123667 rev. 20220317
X10
X9
A1 A1
A2 A2
3
3
1
1
K6 K3
41 42
58
44
56
X14
37
40
X15
N
L
Power and I/O board
500V
!
Insulation test
>1MΩ
±600Ω
L1
L2
L3
N
N
N
1 2 3 1 2 3
1 2 3 1 2 3
V~
V~
230V~
400V~
1 2 3 1 2 3
3x
16 -17Ω
L1 L1
L2 L2
L3 L3
N N
N N
N N
V~
230V~
L1-L2-L3
L-N
Working principle.
The temperature is measured by two PT1000 sensors.
The upper sensor controls the top heater and the lo-
wer sensor controls the lower heater.
Therefore, two separate contacters are controlled by
the board.
Blower malfunction overheat protection!
• A vane switch is mounted on each blower to de-
tect the minimum rotationspeed.
• Both switches are put in series with the neutral
side of the contactors.
• The contacts only close when the blowers speed is
high enough.
Passive measurements.
Contactor
Between A1 and A2 ±600Ω
Heating element (10kW -> 3x 3,33kW)
The picture shows how the heating elements are con-
nected on the terminals.
• Each element is ± 16,5Ω
• The insulation of each element has to be >1MΩ.
Active measurements
On the contactor coils 230V
On the heater 230V on each element.
On the heater 400V between L1-L2, L1-L3 and L2-L3
Trouble shooting.
Open the MFMB outputs of the I/O test facility
Activate output x6 -> the Blowers start.
Proceed as follows:
(X9-N means “between X9 and Neutral”)
Activate output X9
Measure Value If Not ok
X9 - N 230V~ Board failure or N & L ex-
changed on X14 and X15.
K3(A1) - N 230V~ Wire 42 disconnected
K3(A2) - N 0V~
Open vane switch or loose wire.
K3 = On? Broken contacter
Activate output X10 ( switch off X9 !! )
X10 - N 230V~ Board failure or N & L ex-
changed on X14 and X15.
K6(A1) - N 230V~ Wire 41 disconnected
K6(A2) - N 0V~
Open vane switch or loose wire.
K6 = ON? Broken contacter
Switch OFF X10
3 separate
heaters