188 Troubleshooting guide
Manual Energy Storage Inverter ESI-S
Fault message
Cause
What to do
IGBT check cooling
The software IGBT
temperature protection
has been triggered.
−
Check the cooling of the inverter
system (fans and air flow, heatsink).
−
Check the cooling of the location
where the inverter is installed (air
conditioning system etc.)
−
Ensure that the correct derating
factor is applied noting the ambient
temperature and altitude.
IGBT
permanent
The
IGBT
module
reports
an error that cannot be
cleared by the system.
This error can be due to
peak overcurrent, too low
control voltage for the
IGBT drivers or IGBT
module failure.
−
Identify unit for which the red LED (3)
is on.
−
Inspect the corresponding IGBT
module (bridge and DC capacitors)
for visual traces of damage. If they
are present, exchange the IGBT
module.
−
Verify flat cable connection between
the Control board and the IGBTs.
−
Ensure that the Control board power
supply is around 24 V. If significantly
lower, check the 24 V power supply
and the wiring between this supply
and the Control board.
IGBT temporary
The IGBT modules report
a transient error that
could be automatically
cleared by the system.
This error can be due to
peak overcurrent or a too
low control voltage for
the IGBT drivers.
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):
−
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.
−
Desactivate All features
−
Inspect the items discussed for the
‘IGBT permanent’ message.
