212 Troubleshooting guide
Manual Energy Storage Inverter ESI-S
Fault message
Cause
What to do
Overvolt. Transient
(SW)
The software transient
network overvoltage
protection has been
triggered.
If the errors occur sporadically and the
system rides through, nothing has to be
done. If the system does not ride
through (too many transient errors in a
short time):
−
Measure the line voltages with a
device capable of measuring the peak
voltage (e.g. scopemeter) and verify
that this value is within acceptable
limits.
−
Measure the RMS value of the network
voltage and compare with the line
voltages given by the inverter (ESI-
Manager or PQF-Link).
−
Ensure that the AC voltage is properly
measured. Do the checks discussed
for the ‘Loss of phase’ fault.
−
Check the earthing of the unit.
Overcurrent
RMS
The
system
has
detected
RMS overcurrent in the
inverter.
−
Verify that the inverter CTs are
properly installed and are not
shorted.
−
Verify that the unit current ratings
and order programmed at the
commissioning stage corresponds to
the rating and order physically
present.
−
Verify the inverter cooling system and
check the IGBT temperature using the
ESI-Manager.
−
Deactivate all features
Overcurrent peak
(SW)
The software peak
current protection has
been triggered.
−
Verify that the inverter CTs are
properly installed and are not
shorted.
−
Verify that the unit current ratings
and order programmed at the
commissioning stage corresponds to
the rating and order physically
present.
−
Verify the inverter cooling system and
check the IGBT temperature using the
ESI-Manager.
−
Deactivate all features
