Display Message Causes Solution
E023
DC injection
(DC-Injection out of
range)
The error is generated if the
direct component of the current
supplied to the grid exceeds the
threshold of 0.5% of the rated
operating current.
The error does not stop the
inverter; instead the inverter
tries to connect to the grid again.
Sporadic repetition of the error
is a sign of large grid distortions
or sudden changes in sunlight;
whereas systematic repetition of
the error warning will be a sign of
an inverter fault.
If the grid voltage is strongly distorted, report this
anomaly to the utility company for the resolution of
the problem. If there is an inverter fault, contact ABB
technical support.
E024
Internal error
Error inside the inverter. Error inside the inverter that cannot be checked
externally. If the problem persists (after switching the
inverter off and then on again), contact ABB technical
support.
E025
Riso Low
(Low insulation
resistance)
Before connecting to the grid,
the inverter measures the
insulation resistance of the PV
array compared to ground. If the
insulation resistance measured
by the inverter is less than 1
MOhm, the inverter does not
connect to the grid and shows
the “Riso Low” error. The causes
may be:
- Damaged PV module(s).
- Junction box(es) not properly
sealed, allowing water intrusion;
- Loose connections between
modules allowing humidity
leakage;
- Poor quality cable junctions;
- Presence of unsuitable
(trigger voltage lower than the
characteristics of the PV array
strings) or damaged overvoltage
surge arresters outside the
inverter in the DC section.
- Presence of humidity inside the
photovoltaic module.
If possible, measure the insulation resistance using a
megohmmeter positioned between the photovoltaic
eld (positive terminal short-circuited to the negative
pole) and ground (as described in the relevant
section: “checking the ground insulation of the PV
array”). If the measured value is less than 1 mega
ohm, the photovoltaic array must be checked by
a technician/installer to identify and eliminate the
problem. If the measured value is greater than 1
mega ohm and the error warning continues to be
present, contact ABB technical support.
(High humidity increases leakage and can therefore
be the cause of a reduction in insulation resistance).
To Next Page
Loading...
