Power Optimizer Troubleshooting - SolarEdge SE50K Installation Manual

Power Optimizer Troubleshooting

Power Optimizer Troubleshooting
Problem
Pairing failed
String voltage is 0V
String voltage not 0V but lower than number of
optimizers
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.
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Extended Power Commercial Inverter Installation Guide MAN-01-00402-1.0
Possible cause and troubleshooting
Power optimizers are shaded.
If you connected the inverter to the SolarEdge 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.
Power optimizer(s) output is disconnected.
Connect all power optimizer outputs.
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.
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.
Disconnect the wires connecting the power optimizers in
o
the string.
Measure the output voltage of each power optimizer to
o
locate the power optimizer that does not output 1V safety
voltage. If a malfunctioning power optimizer is located,
check its connections, polarity, module, and voltage.
Contact SolarEdge Support. Do not continue before
o
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.