Alarm 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 internal web user interface,
follow the table given in the following paragraph.
The equipment can notify errors/warnings in the Alarm section of the inter-
nal web user interface only if the input voltage is greater than the Vdcmin
voltage (POWER Led ashing 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
- 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 eld (positive terminal short-circuit-
ed at the negative pole) respect to ground. The measurement is
strongly inuenced 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 ash.
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 ash.
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 suf-
cient irradiation and the correct composition of the system.
- If it exceeds Vstart, contact customer assistance
- W001
- Sun Low
-
Alarm LED
Insufcient irradiation (Low input voltage on
switching on the inverter):
Incorrect conguration of the PV generator or an “on
the limit” conguration 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 suf-
cient irradiation and the correct composition of the system.
- If it exceeds Vstart, contact customer assistance
- W002
- Input UV
-
Alarm LED
Insufcient irradiation (Low input voltage on
switching off):
Incorrect conguration of the photovoltaic generator
or an “on the limit” conguration 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-
c i e n t i r r a d i a t i o n a n d t h e c o r r e c t c o m p o s i t i o n o f t h e s y s t e m .
- If it exceeds Vstart, contact customer assistance
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