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- Error code
- Error message
Name of Alarm and Cause
- Warning
High leakage current measured on the DC side
(photovoltaic generator):
The alarm is generated when, during normal operation
- E018
of the inverter, a ground leakage current is detected
- Ground Fault
in the DC section of the system. It is also possible
-
Red LED
that the inverter generates the alarm E018 message
also due to AC leakage currents connected to the
capacitive nature of the photovoltaic generator
compared to ground.
Failure of test on sensor to measure the leakage
current (DC side):
Before connecting to the grid the inverter runs an
autotest regarding the sensor for the leakage current.
- E019
The test is carried out by "forcing", in the sensor of
- Ileak sense.fail
the leakage current, a current with a known value:
-
Yellow LED
the microprocessor compares the value read with the
known value.
The error is generated if the comparison between the
read value and the known value during the test does
not fall within the allowed tolerance.
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
- Self Test Error 1
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
- Self Test Error 2
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 autotest carried out on the
- Self Test Error 4
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 in error
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
fault in the inverter
- E024
Error inside the inverter:
- Internal error
Error inside the inverter
Yellow LED
-
- 157 -
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Solution
• Measure the insulation resistance using a megohmmeter
positioned in the photovoltaic field (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.
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.
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.
8 - Maintenance
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