- 138 -
000908AG
8 - Maintenance
A
larm Messages
The equipment can notify errors/warnings and can be checked via web
server user interface.
The following table gives the complete list of errors/warnings relating to string inverters. Some
error/warning codes may not be used depending on the inverter model installed.
- Error code
- Error message
- Warning
Name of Alarm and Cause
Solution
- No code
- Ground F
-
(On)
Ground fault of photovoltaic generator:
The alarm is generated when a ground leakage
current is detected in the DC section of the system.
0HDVXUHWKH
insulation resistance using a megohmmeter
SRVLWLRQHGLQWKHSKRWRYROWDLF¿HOGSRVLWLYHWHUPLQDOVKRUW
circuited at the negative pole) compared to ground. The
PHDVXUHPHQWLVVWURQJO\LQÀXHQFHGE\WKHHQYLURQPHQWDO
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.
- No code
- Missing Grid
-
(On)
Missing Grid:
The inverter does not detect grid voltage (AC side).
&KHFNWKH
grid voltage on the inverter's AC terminal block.
- Should it be absent, check any protection work on the line
and the presence of grid voltage on the supply point.
- No code
- Memory fault
-
ÀDVKLQJVORZ
Memory fault:
The inverter has detected a communication problem
with the memory board on which the inverter saves
the daily value of energy produced.
5HPRYHWKHPHPRU\ERDUGDQGFKHFNWKHZHOGLQJRIDOOWKH
connector's terminals. Subsequently reinsert the memory board
and check that it is correctly inserted into the dedicated slot
- If the signal persists also following the above checks, contact
customer assistance.
- No code
- Waiting Sun
-
ÀDVKLQJVORZ
Waiting Sun:
The inverter goes into the “Waiting Sun” stage when,
following a W001 and/or W002 warning, the voltage
from the photovoltaic generator is less than the
activation voltage (Vstart).
&KHFNWKH
input voltage on the inverter.
- If it does not exceed Vstart, check for the presence of
VXI¿FLHQWLUUDGLDWLRQDQGWKHFRUUHFWFRPSRVLWLRQRIWKHV\VWHP
- If it exceeds Vstart, contact customer assistance
- W001
- Sun Low
-
(On)
,QVXI¿FLHQWLUUDGLDWLRQ/RZ
input voltage on
switching on the inverter):
,QFRUUHFWFRQ¿JXUDWLRQRIWKH
PV generator or an “on
WKHOLPLW´FRQ¿JXUDWLRQIRUWKHLQYHUWHUVPLQLPXP
input
voltage.
&KHFNWKH
input voltage on the inverter.
- If it does not exceed Vstart, check for the presence of
VXI¿FLHQWLUUDGLDWLRQDQGWKHFRUUHFWFRPSRVLWLRQRIWKHV\VWHP
- If it exceeds Vstart, contact customer assistance
- W002
- Input UV
-
(On)
,QVXI¿FLHQWLUUDGLDWLRQ/RZ
input voltage on
switching off):
,QFRUUHFWFRQ¿JXUDWLRQRIWKH
photovoltaic generator
RUDQ³RQWKHOLPLW´FRQ¿JXUDWLRQIRUWKHLQYHUWHUV
minimum input voltage.
&KHFNWKH
input voltage on the inverter.
- If it does not exceed Vstart, check for the presence of
VXI¿FLHQWLUUDGLDWLRQDQGWKHFRUUHFWFRPSRVLWLRQRIWKHV\VWHP
- If it exceeds Vstart, contact customer assistance
- W004
- Grid OV
-
(On)
Grid overvoltage:
This error signal occurs when during the inverter's
normal operation the grid voltage exceeds the
maximum limit set by the operator.
&KHFNWKH
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.
&KHFNWKH
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
-
(On)
Grid undervoltage:
This error signal occurs when during the inverter's
normal operation the grid voltage exceeds the
minimum limit set by the operator.
&KHFNWKH
grid voltage on the inverter.
&KHFNWKH
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
