Sunway NT 2600 - Manual (Page 51)

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3.4 Fault diagnosis
Fault display
Overtemperature
UDC
Overvoltage
Causes
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.
The maximum DC voltage
has been exceeded.
Too many modules are con-
nected in series.
Remedies
The installation location is not suitable.
Please find another installation location.
Clean the solar inverter if dirt is
impeding the cooling unit.
Remove the objects.
Check the dimensioning of your
PV generator.
Reduce the number of modules and
re-commission the system.