Operation and installation manual
Page 91 of 96
(PVI-STRINGCOMB (-S, -MC, -S-MC) - Rev:1.0)
PROBLEM
POSSIBLE CAUSE
SOLUTION
Burnt fuse
Too much current flowed
to the string
Change the fuse (§10.2.2)
If the problem arises again, check for
anomalies on the string.
The single monitor
window shows no
parameter or
signal
The button [Start
StringComb
Monitoring] button has
not been pressed.
Press the [Start StringComb
Monitoring] button.
Environment and Visual Controls
Red led
On
The Micro is blocked
Contact the supplier
Red led off
a) Board power failure
b) Probable board fault
a) The board is fed directly from the
panels. Check that the environmental
conditions are adequate (e.g.: that
there is sunlight).
Also check that at least one string (+
and -) is connected and that the string
fuses are connected.
b) Contact the supplier
There is water
inside the box
a) The box was not
correctly closed.
b) The cable glands were
not tightened correctly.
c) The box is damaged
a) Check correct sealing and that the
surface supporting the PVI-
STRINGCOMB(-S) is not warped.
b) Tighten all cable glands and make
sure that the internal rubber
protection is present and intact.
Unused cable glands must be sealed
with appropriate caps or silicon.
c) Contact the supplier
Inverter
The inverter is not
getting DC from
the panels
a) The switch on the PVI-
STRINGCOMB-S is
open.
b) Interruption on the DC
line
a) Close the DC switch inside the
PVI-STRINGCOMB-S.
b) Are the DC output wires
connected?
Are the string fuses inserted?
The inverter
signals a generic
fault on a
stringcomb.
Check the cause on the
inverter display
Check whether the following points
cover this case.
Otherwise contact the supplier.
