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ELECTRICAL TESTS
Page 59
Service Manual Deli Multisserie form 9123667 rev. 20220317
500V
!
Insulation test
>50 MΩ
*
*
500V
!
6 µF
2,73
Ω
2,70
Ω
2,62
Ω
2,32
Ω
2,67
Ω
2,59
Ω
2,15
Ω
0V
240V
230V
220V
208V
165V
145V
200V
Violet
Blue
Green
Yellow
Orange
Red
Brown
Black
The speed transformer.
General.
This transformer has big copper wires and therefore
the resistance is very low.
For this reason it is difficult to measure the right value
because of deviations in the multimeter and contact
resistances of the test probes.
Therefore it is recommended to define this measu-
rement error as good as possible with the following
instruction.
Defining the measurement error!
• Put both test probes on the same terminal or in
this case the same wire.
• Write down the reading. For example 0,22 Ω.
• Subtract this value from the next measurements.
For example, the reading of the total coil (Black-Vio-
let) is 2,95 Ω. The real value is 2,95 - 0,22 = 2,73 Ω.
Tip: Insulation testers (Megger) often have a very
good resistance meter.
Measuring the transformer coils. (see overview)
Disconnect the wires from the terminal block first!
The transformer has 6 coils which are all put in series.
Therefore, insulation test is not possible.
Resistances measured against the black (0V) wire.
Vilolet:
2,73 Ω (240V~ in)
Blue:
2,70 Ω (230V~ in) Used
Green:
2,67 Ω (220V~ out) Used
Yellow:
2,62 Ω (208V~ out)
Orange:
2,59 Ω (200V~ in)
Red:
2,32 Ω (165V~ out) Used
Brown:
2,15 Ω (145V~ out)
The 6µF capacitors
General
Even with a capacitance meter it is impossible to de-
termine for sure if the capacitor is ok or not, because
it can be leaking when it is connected to mains power.
A quick optical check often tells more. Search for
leaking oil and / or bulges (lumps).
Measuring with an insulation tester in 500V position.
Work under
safe conditions according local legisla-
tion!
The value will not reach
∞
Ω, but will go up and down
a little. When it is above 50MΩ it wil be ok. Disconnect
the test leads while the value is at the highest posi-
tion. The capacitor is now charged with ± 500VDC!!
Leave it for a few seconds and then put the wires to-
gether. A loud spark must arise. If not, the capacitor is
leaking (loosing its charge).
It is also possible to charge the capacitor by shortly con
Define the measure-
ment error.
Electrical diagram
speed transformer
Loosening wires:
Push a small slotted screwdriver (max
4mm)in the square hole, while moving
it to the center of the terminal block,
and take out the wire.
Blck
Vi
Bl
Grn Ye
Or
Rd
Brn
Содержание Deli Multisserie
Страница 2: ...TABLE OF CONTENTS Page 2 Service Manual Deli Multisserie form 9123667 rev 20220317 EMPTY PAGE...
Страница 69: ...ELECTRICAL TESTS Page 69 Service Manual Deli Multisserie form 9123667 rev 20220317...
Страница 85: ...TROUBLE SHOOTING Page 85 Service Manual Deli Multisserie form 9123667 rev 20220317 EMPTY PAGE...
Страница 127: ...Page 127 ELECTRICAL DIAGRAMS Service Manual Deli Multisserie form 9123667 rev 20220317 EMPTY PAGE...
Страница 132: ...Page 132 Service Manual Deli Multisserie form 9123667 rev 20220317...