- 142 -
000845BG
7 - Operation
• The negative string fuses plate
20
are located behind the positive
string fuses plate
19
. In order to access at this board it is needed
to remove two screws and open the positive metal plate by tilting it
from the right to left side as described in the chapter “Access the
negative side string fuses board”.
R S T N
20
CH1
CH3
CH5
CH2
CH4
CH6
PE
• Check the absence of voltage on the DC terminal block measuring
between “Negative-ground”.
• In case of absence of voltage between “Positive-ground” and
“Negative-ground” check that there is no voltage on the all DC
branches coming from the photovoltaic eld, measuring between all
the points: +DC input / -DC input.
12. Voltage absence check on AC side
• Check there is no voltage on the AC branch bus bars downstream
of the AC breaker, measuring between: each phase to PE - Neutral
to PE - each Phase to other Phases – each Phase to Neutral
R S T N
21
R S T N
27
27
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