- Error code
- Error message
- Warning
Name of Alarm and Cause Solution
- W004
- Grid OV
-
Yellow LED
Grid overvoltage:
This error signal occurs when during the inverter's
normal operation the grid voltage exceeds the
maximum limit set by the operator.
• Check the grid voltage on the inverter.
If the voltage tends to rise (when the inverter is connected),
there is a problem of high line or grid impedance.
• Check the grid voltage also on the supply.
- If it is high, it means that there is high grid impedance. In
this case, ask the operator to adjust the grid voltage. If the
operator authorises a change to the inverter's parameters,
agree the new limits with customer assistance
- If the voltage at the point of supply is much lower than that
measured on the inverter, it is necessary to adjust the line
(inverter-contactor).
- If the voltage and the grid frequency come back within the
limits (also when the inverter is connected to the grid), contact
customer assistance
- W005
- Grid UV
-
Yellow LED
Grid undervoltage:
This error signal occurs when during the inverter's
normal operation the grid voltage exceeds the
minimum limit set by the operator.
• Check the grid voltage on the inverter.
• Check the grid voltage also on the supply.
- If it is high, it means that there is high grid impedance. In
this case, ask the operator to adjust the grid voltage. If the
operator authorises a change to the inverter's parameters,
agree the new limits with customer assistance
- If the voltage at the point of supply is much lower than that
measured on the inverter, it is necessary to adjust the line
(inverter-contactor).
- If the voltage and the grid frequency come back within the
limits (also when the inverter is connected to the grid), contact
customer assistance
- W006
- Grid OF
-
Yellow LED
Grid over-frequency:
This error signal occurs when during the inverter's
normal operation the grid frequency exceeds the
maximum limit set by the operator.
• Check the grid frequency in the inverter.
• Check the grid frequency also on the supply:
- If the voltage and the grid frequency come back within the
limits (also when the inverter is connected to the grid), contact
customer assistance
- W007
- Grid UF
-
Yellow LED
Grid under-frequency:
This error signal occurs when during the inverter's
normal operation the grid frequency exceeds the
minimum limit set by the operator.
• Check the grid frequency in the inverter.
• Check the grid frequency also on the supply:
- If the voltage and the grid frequency come back within the
limits (also when the inverter is connected to the grid), contact
customer assistance
- W009
- Empty Table
-
Yellow LED
Characterisation board for the wind generator not
compiled (only WIND models)
(only WIND models)
- W010 *
- Fan Fail
-
Flashing yellow
LED
*not visualised on
display
Fan Fail:
This error occurs when there is a malfunction in the
fan/fans inside the inverter.
• Error inside the inverter and cannot be checked externally.
- If the alarm repeats persistently, contact customer
assistance.
- W011
- Bulk UV
-
Yellow LED
Low “Bulk” voltage (DC-DC circuit):
The alarm (which is a warning and not an error)
is generated when the voltage at the heads of the
bulk capacitors does not reach the threshold for
the operation of the inverter (internal unchangeable
threshold).
• Raise the value of the activation voltage (Vstart) so as to
have sufcient power from the PV generator at the time of the
inverter's grid connection.
• Check the input voltage on the inverter.
- If it does not exceed Vstart, check for the presence of
sufcient irradiation and the correct composition of the system.
- If it exceeds Vstart, contact customer assistance.
- W012 *
- Batt. Low
-
Flashing yellow
LED
*not visualised on
display
Battery Low:
The inverter has detected a backup battery voltage
that is too low.
• Check that the date/time are set correctly and, if they are not,
set them.
Subsequently arrange to completely switch off the inverter (on
both AC and DC) and wait a few minutes.
Finally, restart the inverter and check whether the date/
time are now correctly set or whether they have reset to
01/01/2000. In this case replace the battery with the inverter
completely switched off (isolate AC and DC side) being careful
to maintain the polarity
- W013 *
- Clock Fail
-
Flashing yellow
LED
*not visualised on
display
Clock Fail:
The alarm occurs when there is a difference of more
than 1 minute in the time shown on the display or via
the advanced conguration software compared to the
internal time of the microprocessors and indicates a
malfunction of the clock circuit.
• Error inside the inverter and cannot be checked externally.
- If the alarm repeats persistently, contact customer
assistance.
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