ABB PVS-50-TL

- 152 -
000761AG
8 - Maintenance
- Error code
- Error message
- Warning
Name of Alarm and Cause Solution
- E022
- Self Test Error 4
- Yellow LED
Timeout of the tests undertaken on the relays
inside the inverter:
Execution time for the self-test carried out on the
relay of the DC_AC (inverter) circuit too high. It may
indicate a problem connected to the aforementioned
relays
• Error inside the inverter and cannot be checked externally.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E023
- DC in error
- Yellow LED
Feeding of direct current to grid outside 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.
In any case, the inverter does not stop because of the
E023 error, but tries to connect to the grid again.
The sporadic repetition of the error is a sign of serious
grid distortions or sharp irradiation changes, while
systematic repetition of the error signal will indicate a
breakdown on the inverter
Once the error appears, the inverter attempts to resume
normal operation.
- Should the error occur sporadically, it may be caused by a
brusque transition of the grid voltage or of the input voltage,
but is not due to a malfunction by the inverter.
- If the error is connected to an internal fault, it will continue to
appear and so it is necessary to contact customer assistance.
- E024
- Internal error
- Yellow LED
Error inside the inverter:
Error inside the inverter
• Error inside the inverter and cannot be checked externally.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E025*
- Riso Low
- Red LED
*not visualised on
display
Low value of isolation resistance:
Before connecting to the grid the inverter measures
the isolation resistance of the PV generator compared
to ground. Should the measurement of the isolation
resistance be below 1Mohm, the inverter does not
connect to the grid and shows the “Riso Low” error. The
causes may be:
- Damaged PV panel(s).
- Junction box(es) of the panels not correctly sealed,
so as to permit inltration by water and/or humidity;
- Problems in connections between panels (not
perfectly t);
- Poor quality of cable joints;
- Presence in the DC section of unsuitable or
damaged overvoltage surge arresters outside the
inverter (reduced ignition voltage compared to the
characteristics of the strings of the PV generator);
- Presence of humidity inside any junction box
• Measure the isolation resistance using a megohmmeter
positioned in the photovoltaic array (positive terminal short-
circuited at the negative pole) compared to ground. The
measurement is strongly inuenced by the environmental
conditions, so must be made under the same conditions in
which the error occurred.
- If the value measured is lower than 1 megaohm, a
check must be carried out by a technician/installer on the
photovoltaic generator to identify and eliminate the problem.
- If the value measured is higher than 1 megaohm and the
error signal persists, contact customer assistance.
- E026
- Vref Error
- Yellow LED
Internal reference voltage outside of range:
Wrong measurement of reference voltage inside
inverter
• Error inside the inverter and cannot be checked externally.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E027
- Error Meas V
- Yellow LED
Grid voltage outside of range:
Error in the internal measurement of grid voltage
(set by law) to have a redundant measurement (2
measurements on the same parameter made by two
different circuits)
• Error inside the inverter and cannot be checked externally.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E028
- Error Meas F
- Yellow LED
Grid frequency outside of range:
Error in the internal measurement of the grid
frequency (imposed by regulations) to have a
measurement redundancy (2 measurements on the
same parameter carried out by two different circuits).
• Error inside the inverter and cannot be checked externally.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E029
- Mid Bulk OV
- Yellow LED
Internal overvoltage on the measurement of the
“Mid bulk”:
Error inside the inverter (only triphase models)
• Error inside the inverter and cannot be checked externally.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E030
- Error Meas Ileak
- Yellow LED
High leakage current (DC side):
- Error on the internal measurement (performed when
the inverter is connected to the grid) of the DC side
(PV generator) leakage current with respect to ground
(required by regulations) to have a measurement
redundancy (2 measurements of the same parameter
carried out by two independent circuits)
• Error inside the inverter and cannot be checked externally.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.