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3.4 Fault
diagnosis
Fault display
Fault 3
DC overvoltage
Fault 4
Frequency error
Fault 5
Overheating
Causes
The maximum DC voltage
has been exceeded.
Too many modules are
connected in series.
The grid frequency is out-
side the permissible range.
The maximum permissible
ambient temperature of
40°C has been exceeded.
The necessary air circulation
was not taken into account
during installation.
Objects have been stored
on the heat sink, impeding
free convection.
Remedies
Check the dimensioning of your
PV generator.
Reduce the number of modules and
re-commission the system.
Ask your electricity board about grid
stability and design.
The installation location is not suitable.
Please find another installation location.
Clean the solar inverter if dirt is impe-
ding the cooling unit.
Remove the objects.
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