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- 173 -
000700CG
8 - Maintenance
A
larm Messages of the Inverter
In order to understand and resolve warning (Wxxx) or error (Exxx) sig-
nals that appear in the Alarm section of the web user interface 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 web
user interface or on the display only if the input voltage is greater than the
Vdcmin voltage (POWER Led flashing or lit; see chapter on operation)
The messages and related codes are shown in the Alarm section of the
web user interface or on the display.
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.
- Code on display
- Error message
- Signal
Name of Alarm and Cause
Solution
- R-Iso Low
- Ground Fault
-
GFI 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 insulation resistance using a megohmmeter po-
sitioned in the photovoltaic field (positive terminal short-circuit
-
ed at the negative pole) respect 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 gen-
erator 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
- 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
-
Alarm LED
Missing Grid:
The inverter displays the “Missing Grid” message when
it does not record output 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 Fail
-
Alarm LED flash.
Memory fail:
The inverter displays the “Memory Fail” message when
it records 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
-
Power LED flash.
Waiting Sun:
The inverter displays the “Waiting Sun” message when,
following a W001 and/or W002 notice, 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 suffi
-
cient irradiation and the correct composition of the system.
- If it exceeds Vstart, contact customer assistance
- W001
- Sun Low
-
Alarm 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 suffi
-
cient irradiation and the correct composition of the system.
- If it exceeds Vstart, contact customer assistance
- W002
- Input UV
-
Alarm 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 mini
-
mum input voltage
Check the input voltage on the inverter.
- If it does not exceed Vstart, check for the presence of suf-
ficient irradiation and the correct composition of the system.
- If it exceeds Vstart, contact customer assistance