Problem Possible cause and troubleshooting
String voltage is higher than
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.
Extra power optimizer(s) connected in the
string (not applicable to smart modules).
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 (not applicable to
smart modules).
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.
Power optimizer(s) malfunction.
1. Disconnect the wires connecting the power
optimizers in the string.
2. Measure the output voltage of each power
optimizer to locate the power optimizer that
does not output 1V safety voltage. If a
malfunctioning power optimizeris located,
check its connections, polarity, module, and
voltage.
3. Contact SolarEdge Support. 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 79
Three Phase Inverter with Synergy Technology Installation MAN-01-00402-1.2
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