P400 Installation

Problem Possible Cause Possible Solution
String voltage is higher than
the number of optimizers
WARNING!
If the measured voltage is
too high, the installation may
not have a safe low voltage.
PROCEED WITH CARE! A
deviation of ±1% per string is
reasonable.
Si la tension mesuree est
trop haute, la tension basse
de securite pourrait
manquer dans l’installation.
REDOUBLEZ DE
PRECAUTION. Une
deviation de ±1% par string
est raisonnable.
One or more extra power optimizer
are connected in the string
Check if an extra power
optimizer is connected in the
string. If not – proceed to next
solution.
A module is connected directly to the
string, without a power optimizer.
Verify that only power
optimizers are connected in the
string and that no module
outputs are connected without
a power optimizer. If the
problem persists, proceed to
the next step.
A malfunction of one of the power
optimizers
o
Disconnect the wires that
connect the power
optimizers in the string.
o
Measure the output voltage
of each power optimizer in
order to locate the power
optimizer that does not
output the 1V safety
voltage.If a malfunctioning
power optimizer is located,
check its connections,
polarity, module, and
voltage.
o
Do not continue before
finding the problem and
replacing the malfunctioning
power optimizer.If a
malfunction cannot be
bypassed or resolved, skip
the malfunctioning power
optimizer, thus connecting
a shorter string.
Appendix A: Errors and Troubleshooting
SolarEdge-Installation Guide MAN-01-00002-4.0
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