SolarEdge RESU10H Prime Series Installation Manual page 72

Malfunction
PV string Voltage is higher than
number of Power 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 PV
string is reasonable.
AVERTISSEMENT!
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.
Single Phase Energy Hub Inverter with Prism Technology MAN-01-00842-1.3
Appendix A: Errors and Troubleshooting
Possible Cause and Corrective Action
Extra Power Optimizer(s) connected in the PV
string (not applicable to smart panels).
Check if an extra Power Optimizer is connected
in the PV string. If not – proceed to next solution.
A panel is connected directly to the PV string,
without a Power Optimizer (not applicable to
smart panels).
Verify that only Power Optimizers are connected
in the PV string and that no panel 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 PV 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 Optimizers located,
check its connections, polarity, panel, 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 PV string.
71