Appendix A: Troubleshooting; For Installations With Solaredge Inverters - SolarEdge Power Optimizer Installation Manual

Appendix A: Troubleshooting

For Installations with SolarEdge Inverters

Problem
String voltage is 0V
String voltage not 0V but
lower than no. of
optimizers
String voltage 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.
18
Possible Cause
Output of one or more power
optimizers is disconnected
One or more of the power
optimizers are not connected
in the string
One or more of the modules
are not connected properly to
their power optimizer inputs
Wrong polarity connection on
one of the strings
An extra power optimizer is
connected in the string
A module is connected directly
to the string, without a power
optimizer.
A malfunction of one of the
power optimizers
SafeDC mode was disabled
using the SolarEdge Key
SolarEdge Power Optimizers Installation Guide – MAN-01-00112-1.2
Appendix A: Troubleshooting
Possible Solution
Connect all power optimizer outputs
Connect all power optimizers
Connect the modules to the optimizer
inputs
Check polarity of the string output using
a voltmeter and correct if needed.
Check if an extra power optimizer is
connected in the string. If not – proceed
to next solution.
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.
Disconnect the wires that connect
the power optimizers in the string.
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.
If a malfunction cannot be
bypassed or resolved, skip the
malfunctioning power optimizer,
thus connecting a shorter string.
Do not continue before finding
the problem and replacing the
malfunctioning power optimizer.
Enable the SafeDC.