Appendix A: Errors and Troubleshooting
SolarEdge Installation Guide - MAN-01-00060-2.6
60
Troubleshooting power optimizers
Problem
Possible reason
Possible solution
The string voltage is 0V
The output of one or more power optimizer
is disconnected
Connect all power optimizers outputs
The chain tension is not to 0V but
is less than the
number of optimizers
One or more power optimizers are not connected to the
chain
Connect all power optimizers
One or more modules are not properly connected to the
inputs of power optimizers
Connect the modules to inputs optimizers
Incorrect polarity of the connection on one of the chains
Check the polarity of the output of the string using a multimeter
and correct if necessary.
The tension on the chain is higher
than the number of system
optimizers
WARNING !
If the measured voltage
is too high, the system may not be
security voltage. PROCEED WITH
CAUTION! A deviation of ± 1% per
chain is reasonable ..
One or more optimizers supplementary system are
connected to the chain
Check whether an additional power optimizer is connected to
the chain. If not, skip to the next solution.
A module is directly connected to the chain, without a
power optimizer.
Verify that only power optimizers connected to the chain and
that no module output is connected without a power optimizer. If
the problem persists, proceed to the next step.
Failure of a power optimizers
•
Disconnect the cables connecting the power optimizer on
the chain.
•
Measure the output voltage of each power optimizer to
locate the power optimizer that does not 1V output voltage
safety.
•
If a fault on a power optimizer is detected, check its
connections, polarity, modulus, and tension.
•
Do not continue before finding the problem and replace
the defective power optimizer.
•
If a malfunction can not be bypassed or resolved, skip
the defective power optimizer, thus connecting a shorter
string.
The SafeDC mode
previously been disabled using the key SolarEdge
Enable SafeDC using SolarEdge key
The coupling of the UPS
failed
Power optimizers are shaded
If you have connected the inverter to the SolarEdge Monitoring
Portal using one of the communication options, you can perform
remote coupling. Before leaving the site, make sure the power
inverter on / off or on and the S_OK indication appears on the
LCD screen to indicate connection to the Monitoring Portal.