- 151 -
001058AG
8 - Maintenance
A
larm Messages of the Inverter
In order to understand and resolve warning (Wxxx) or error (Exxx)
signals that appear in the Alarm section of the internal webserver or on
the inverter’s display, follow the table given in the following paragraph.
The equipment can notify errors/warnings in the Alarm section of the
internal webserver or on the display (where present) only if the input
voltage is greater than the Vdcmin voltage (POWER Led flashing or lit;
see chapter on operation)
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
-
Red LED
Ground fault of photovoltaic generator:
The alarm is generated when a leakage current to
ground is detected in the DC section of the system.
• Measure the isolation resistance using a megohmmeter
positioned in the photovoltaic array (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.
- No code
- NEW SYSTEM PART
REFUSED!
-
Flashing yellow
LED
Lack of linkage of the new system part:
The components inside the inverter (e.g. display, fuse
board, communication and control board, etc.) are not
inter-linked. This occurs following the replacement of
one of the components inside the inverter.
• Link the components inside the inverter by accessing the
“Settings > Service > Accept boards” (refer to the procedure
given in this manual).
- If the signal persists also following the linking of the
components, contact customer assistance.
- No code
- SET COUNTRY or
NO NATION
-
No LED
SET COUNTRY or NO NATION:
Indicates that in the installation phase the grid
standard was not set on the inverter.
• Set the grid standard of the country of installation following
the instructions given in this manual for the inverter.
- If the signal persists also after the grid standard has been
set, contact customer assistance.
- No code
- Missing Grid
-
Yellow LED
Missing Grid:
The inverter does not detect grid voltage (AC side).
• Check the 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
-
Flashing yellow
LED
Memory fault:
The inverter has detected a communication problem
with the memory board on which the inverter saves
the daily value of energy produced.
• Remove the memory board and check the welding of all
the 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
-
Flashing green
LED
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).
• 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
- W001
- Sun Low
-
Yellow LED
Insufficient irradiation (Low input voltage on
switching on the inverter):
Incorrect configuration of the PV generator or an “on
the limit” configuration for the inverter's minimum input
voltage.
• 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
- W002
- Input UV
-
Yellow LED
Insufficient irradiation (Low input voltage on
switching off):
Incorrect configuration of the photovoltaic generator
or an “on the limit” configuration for the inverter's
minimum
input voltage.
• 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
