If the alarm occurs occasionally,
then the reason may be the power
grid. The inverter automatically
returns to its normal operating
state when the power grid is back
to normal.
If the alarm is occurring frequently,
check whether the grid
voltage/frequency is within a
permissible range. If it is, check the
AC circuit breaker and the AC
cables of the inverter.
If the alarm occurs repeatedly,
contact the technical support
department in order to adjust the
voltage and frequency limits after
you have obtained the approval of
the local power grid operator.
Check whether too few PV modules
have been switched in series and
correct this if required. The inverter
automatically returns to its normal
operating state.
Check whether too many PV
modules have been switched in
series and correct this if required.
The inverter automatically returns
to its normal operating state
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