5 Operation
52
Display message Description Cause and possible remedies
304:Grid re. The NT Solar Inverter checks the opera-
tion of the mains relay prior to every
switch-on. An error was detected during
this check.
· Restart the Solar Inverter.
If the error still occurs, please contact the
technical hotline. The phone number is
provided on the back of the manual.
305:AFI test The NT Solar Inverter checks the opera-
tion of its residual-current monitoring
device prior to every switch-on. An error
was detected during this check.
· Restart the Solar Inverter.
If the error still occurs, please contact the
technical hotline. The phone number is
provided on the back of the manual.
306:T. meas. The NT Solar Inverter is equipped with
a temperature sensor that monitors the
heat sink temperature. This message
appears if the sensor reports a value out-
side its value range or in case of a sensor
cable break.
The ambient temperature of the Solar
Inverter is outside the permissible range
(< -25°C).
· Wait until the temperature reaches
the permissible operating range.
A cable break has occurred in the
sensor which monitors the heat sink
temperature.
· Please contact the technical hotline.
The phone number is provided on the
back of the manual.
307:Overtmp.
(Warning)
Your Solar Inverter is designed for an
ambient temperature of up to +45°C.
When a specified temperature threshold
of the heat sink is reached, the output
power is reduced linearly. Should the
heat sink temperature nevertheless
continue to increase, feeding is stopped.
This warning appears when the current
heat sink temperature is just below the
switch-off threshold.
The maximum permissible ambient tem-
perature has been exceeded.
· The installation location is not suit-
able. Please find another installation
location.
The necessary air circulation was not
taken into account during installation.
· Clean the Solar Inverter, if dirt pre-
vents cooling.
· Observe the installation distances
specified in the manual.
Objects were laid on the heat sink and
unimpaired convection was prevented.
· Remove the objects.
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