ABB UNO-2.0-TL-OUTD - Page 109

- 109 -
000515AG
8 - Maintenance
- Code on display
- Error message
- Signal
Name of Alarm and Cause Solution
- W048
- Periodic GridOff
-
Yellow LED
Automatic disconnection from the grid due to time
limit:
If the inverter exceeds the set grid connection time limit
set by the grid standard, it will automatically have to
carry out a disconnection and reconnection to the grid
to carry out the Riso test.
• The presence of this alarm is not an error as the automatic
disconnection is prescribed by safety regulations.
- If the inverter disconnects in a shorter time than expected,
contact customer assistance.
- W049 *
-
Global-Settings Event
- No LED
*not visualised on dis-
play
Variation of the grid standard
Variation of the inverter's grid standard; this change
can be made through the display or advanced congu-
ration software.
• The variation in the inverter's grid standard is done directly
by the customer/installer and is not an error. The information
is only saved on the historic record of the events memorised
by the inverter
- W051
- Exit from Stand
Alone connection
-
Yellow LED
Exit from Stand-alone mode:
The alarm is logged when the "Stand Alone" mode is
deactivated or the inverter reconnects to the grid (this
can only be seen if the Stand Alone accessory board
has been installed).
• Deactivation of the Stand Alone mode is done directly by the
customer/installer or automatically by the inverter and is not an
error.
- W058
- System Frozen
-
Yellow LED
Converter in locked state:
The converter lock state is connected to an installation
phase in which the starts-up and grid connection condi-
tions are not yet present.
• Complete the commissioning phase of the inverter.
- If the problem persists (once the commissioning phase has
been completed and the inverter has been switched off and
back on again), contact customer assistance.
- W059
- Output power Over-
load
-
Yellow LED
Overload on Stand-alone output:
The alarm occurs when there is an excessive request
for power by the grid with the inverter in "Stand Alone"
mode (this can only be seen if the Stand Alone acces-
sory board has been installed).
• Disconnect one or more loads from the Stand Alone output.
- If the problem persists (once all loads have been disconnect-
ed and the inverter has been switched off and back on again),
contact customer assistance.
- E001
- Input OC
-
Yellow LED
Input over-current (photovoltaic generator):
The alarm occurs when the inverter's input current ex-
ceeds the inverter's threshold for maximum input cur-
rent.
• Check whether the composition of the PV generator enables
input current which exceeds the maximum threshold allowed by
the inverter and that the conguration of the inputs (independ-
ent or in parallel) is carried out correctly.
- If both checks are positive, contact customer assistance.
- E002
- Input OV
-
Yellow LED
Input overvoltage (photovoltaic generator):
The alarm is generated when the input voltage (from
the PV generator) exceeds the inverter's threshold of
maximum input voltage.
The alarm occurs before reaching the absolute thresh-
old over which the inverter is damaged.
When the inverter's input voltage exceeds the overvolt-
age threshold, the inverter will not start up due to the
generation of the alarm.
• It is necessary to measure the input voltage inside the inverter
with a voltmeter.
- If it is higher than the maximum voltage of the operating range,
the alarm is genuine and it is necessary to check the congura-
tion of the PV generator. If the voltage has also exceeded the
maximum input threshold the inverter could be damaged.
- If it is lower than the maximum voltage of the operating range,
the alarm is caused by an internal malfunction and it is neces-
sary to contact customer assistance.
- E003
- No Parameters
-
Yellow LED
DSP initialisation error:
The main microcontroller cannot initialise correctly the
two DSPs (booster stage and inverter stage). The error
is caused by communication problems on the inverter's
internal bus.
• Error inside the inverter and cannot be checked externally.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E004
- Bulk OV
-
Yellow LED
“Bulk” over-voltage (DC-DC circuit):
Error inside the inverter. The alarm is raised when the
voltage at the heads of the bulk capacitors exceeds the
overvoltage threshold (internal unchangeable thresh-
old).
• The alarm may be triggered by causes external to the inverter:
- An excessive input voltage can be recorded as a condition for
bulk overvoltage. In this case it is advisable to check the invert-
er's input voltage and should this value be close to the input OV
threshold, review the conguration of the photovoltaic generator.
- Excessive grid voltage could cause the bulk voltage to rise in
uncontrolled fashion with a consequent protection intervention
and hence generation of the alarm. In these cases the alarm is
transitory and the inverter automatically restarts
- The alarm may be triggered by causes inside the inverter and
in this case it is necessary to contact customer assistance.
- E005
- Comm.Error
-
Yellow LED
Communication error inside the inverter:
The alarm occurs when there are communication prob-
lems between the control devices inside the inverter.
• Error inside the inverter and cannot be checked externally.
- If the problem (once the inverter has been switched off and
back on) persists, contact customer assistance.
- E006
- Output OC
-
Yellow LED
Output overcurrent:
The alarm occurs when the inverter's output current
exceeds the inverter's threshold for maximum output
current.
• Error inside the inverter and cannot be checked externally.
- If the problem (once the inverter has been switched off and
back on) persists, contact customer assistance.
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