EN
123
- Error code
- Error message
- LED status
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
- 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 sufficient 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
sufficient irradiation and the correct composition of the system.
- If it exceeds Vstart, contact customer assistance.
- W012
- Batt. Low
- Flashing yellow LED
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
Clock Fail:
The alarm occurs when there is a
difference of more than 1 minute in
the time shown on the Web User
Interface 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.
- W015
- Island Detect.
- Yellow LED
Disconnection due to Anti-Islanding:
The inverter has been improperly
connected to an island grid.
• Check that the grid to which the inverter is connected is not
an island grid.
- If the grid to which the inverter is connected is an island
grid, switch the inverter off and then on again: if the problem
persists, contact customer assistance.