Power, Alarm, Gfi Leds Behavior - ABB UNO-DM-TL-PLUS-US Product Manual

P
ower, Alarm, GFI LEDs behavior
= LED On
= LED flashing
= LED Off
= Anyone of the conditions described above
LED status Operating state
Power:
Firmware programming
Alarm:
The inverter firmware is being programmed
GFI:
Power: Night mode (inverter automatically switches off)
Alarm: The inverter is in night time switch-off mode (input voltage less than 70% of the set start-up
GFI: voltage).
Power: Inverter initialisation
Alarm:
This is a transitional state due to the verification of the operating conditions. During this stage
GFI:
the inverter checks that the conditions for connecting to the grid are met.
Power: The inverter is connected and is feeding power into the grid
Alarm: Normal operation. During this stage, the inverter automatically tracks and analyses the
GFI: photovoltaic generator's maximum power point (MPP).
Power: Disconnection from the grid
Alarm: Indicates no grid voltage. This condition does not allow the inverter to connect to the grid (the
GFI: inverter display shows the message "Missing Grid").
Power: Indication of Warning (W message codes) or Error (E message codes)
Alarm: Indicates that the inverter control system has detected a warning (W) or error (E). The display
GFI: shows a message indicating the type of problem found (see Alarm messages).
• Ventilation anomaly
Indicates an anomaly in the operation of the internal ventilation system that could limit output
power at high ambient temperatures.
• Failed association of internal inverter components (after replacement)
Indicates that the installed wiring box (only in the event of a replacement) was already
associated with another inverter and cannot be associated with the new inverter
Power:
• Overvoltage surge arresters triggered (where fitted)
Alarm:
Indicates that any class II overvoltage surge arresters installed on the AC or DC side have
GFI:
been triggered
• String protection fuses triggered (where fitted)
Indicates that one or more input string protection fuses that may be installed have been
triggered
• Autotest (for Italian grid standards only)
The inverter is performing an Autotest
Power: Anomaly in the insulation system of the photovoltaic generator
Alarm: Indicates that a leakage to ground from the PV generator has been detected, causing the
GFI: inverter to disconnect from the grid.
The following table shows all the possible activation combinations of
"Power" "Alarm" and "GFI" LEDs on the LED panel
operating status of the inverter.
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7 - Operation
according to the
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