- Error code
- Error message
- Signal
Name of Alarm and Cause Solution
- W003
- Grid Fail
-
Alarm LED
Parameters of grid voltage outside range:
This error signal occurs when during the inverter's nor-
mal operation the grid parameters exceed the limits
imposed by the grid standard set on the inverter and by
the grid operator or the utility:
- Grid voltage absent (after the signal the inverter goes
to "Missing Grid")
- Unstable grid voltage (down or up)
- Unstable grid frequency
• Check the grid voltage on the inverter.
- Should it be absent, check for absence of grid voltage on the
supply point.
- If, on the other hand, the voltage tends to rise (when the in-
verter is connected) there is 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, you can set
the new limits into “Setup>Setup AC side” of the internal web
user interface (refer to dedicated sections of this manual for
further information).
- If the voltage at the point of supply is much lower than that
measured on the inverter, it is necessary to adjust the line (in-
verter-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
- W004
- Grid OV
-
Alarm LED
Grid overvoltage:
This error signal occurs when during the inverter's nor-
mal 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, you can set
the new limits into “Setup>Setup AC side” of the internal web
user interface (refer to dedicated sections of this manual for
further information).
- If the voltage at the point of supply is much lower than that
measured on the inverter, it is necessary to adjust the line (in-
verter-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
-
Alarm LED
Grid undervoltage:
This error signal occurs when during the inverter's nor-
mal 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 opera-
tor 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 (in-
verter-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
-
Alarm LED
Grid over-frequency:
This error signal occurs when during the inverter's
normal operation the grid frequency exceeds the maxi-
mum 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
-
Alarm LED
Grid under-frequency:
This error signal occurs when during the inverter's nor-
mal 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
- W010 *
- Fan Fail
-
Alarm LED ash.
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.
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