Inverter Alarm Codes - ABB UNO-DM-TL-PLUS-US Product Manual

I
nverter alarm codes
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 Name of Alarm and Cause
- Signal
- R-Iso Low Ground fault of photovoltaic generator:
- Ground Fault The alarm is generated when a leakage current to
- GFI LED ground is detected in the DC section of the system.
- No code
SET COUNTRY or NO NATION:
- SET COUNTRY or
Indicates that in the installation phase the grid standard
NO NATION
was not set on the inverter.
- No LED
- No code Missing Grid:
- Missing Grid The inverter displays the "Missing Grid" message when
- Alarm LED it does not record output voltage (AC side).
Memory fail:
- No code The inverter displays the "Memory Fail" message when
- Memory Fail it records a communication problem with the memory
- Alarm LED lamp. board on which the inverter saves the daily value of
energy produced.
Waiting Sun:
- No code The inverter displays the "Waiting Sun" message when,
- Waiting Sun following a W001 and/or W002 notice, the voltage from
- Power LED lamp. the photovoltaic generator is less than the activation
voltage (Vstart).
Insufficient irradiation (Low input voltage on
- W001 switching on the inverter):
- Sun Low Incorrect configuration of the PV generator or an "on
- Alarm LED the limit" configuration for the inverter's minimum input
voltage.
Insufficient irradiation (Low input voltage on
switching off):
- W002
Incorrect configuration of the photovoltaic generator
- Input UV
or an "on the limit" configuration for the inverter's mini-
- Alarm LED
mum input voltage
In order to understand and resolve warning (Wxxx) or error (Exxx) sig-
nals 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 in-
ternal webserver 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
internal webserver or on the display.
Solution
• 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.
• 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.
• 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.
• 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.
• 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
• 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
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
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8 - Maintenance