ABB PVS-100-TL-B-SY2 Product Manual page 165

- Error code
- Error message Name of Alarm and Cause
- LED status
Failure of the test on the relay of the "Booster"
(DC-DC circuit):
Before connecting to the grid, the inverter carries
- E020 out some internal tests. One of these tests concerns
- Internal error the correct operation of the booster relay. The test is
- Yellow LED carried out by "forcing" the switching of the relay and
checking its operation.
The error is generated if a problem is found in
actioning the relay.
Failure of the test on the inverter's relay (DC-AC
circuit):
Before connecting to the grid, the inverter carries
- E021 out some internal tests. One of these tests concerns
- Internal error the correct operation of the inverter relay. The test is
- Yellow LED carried out by "forcing" the switching of the relay and
checking its operation.
The error is generated if a problem is found in
actioning the relay.
Timeout of the tests undertaken on the relays
inside the inverter:
- E022
Execution time for the self-test carried out on the
- Internal error
relay of the DC_AC (inverter) circuit too high. It may
- Yellow LED
indicate a problem connected to the aforementioned
relays
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.
- E023
In any case, the inverter does not stop because of the
- DC injection
E023 error, but tries to connect to the grid again.
- Yellow LED
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
- E024
Error inside the inverter:
- Internal error
Error inside the inverter
- Yellow LED
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:
- E025
- Damaged PV panel(s).
- Riso Low - Junction box(es) of the panels not correctly sealed,
- Red LED so as to permit infiltration by water and/or humidity;
- Problems in connections between panels (not
perfectly fit);
- 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
- E026 Internal reference voltage outside of range:
- Internal error Wrong measurement of reference voltage inside
- Yellow LED inverter
Grid voltage outside of range:
- E027 Error in the internal measurement of grid voltage
- Internal error
(set by law) to have a redundant measurement (2
-
Yellow LED measurements on the same parameter made by two
different circuits)
Solution
• Error inside the inverter and cannot be checked externally.
By its nature, the alarm only occurs prior to connection to the
grid
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
• Error inside the inverter and cannot be checked externally.
By its nature, the alarm only occurs prior to connection to the
grid
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
• 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.
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.
• 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.
• 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 influenced 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.
• 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.
• 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.
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8 - Maintenance