Installation Guide

Power Optimizer Troubleshooting
Problem
Possible cause and
troubleshooting
Pairing failed
Power optimizers are shaded.
If you connected the inverter to the monitoring
platform, retry pairing remotely (during
sunlight). Make sure to leave the inverter
ON/OFF switch ON and that S_OK appears in
the status screen.
String voltage is 0V
Power optimizer (s) output is disconnected.
Connect all power optimizer outputs.
String voltage not 0V but lower than number of optimizers
Power optimizer(s) not connected in the string.
Connect all power optimizers
Module(s) not connected properly to power
optimizer inputs (not applicable to smart
modules).
Connect the modules to the optimizer inputs
String reverse polarity.
Check string polarity using a voltmeter and
correct if needed.
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.
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.
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.
o
Disconnect the wires connecting the power
optimizers in the string.
o
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.
o
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
-Single Phase Inverter with HD-Wave Technology Installation MAN-01-00541-1.0
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