ABB UNO-DM-TL-PLUS-US - Page 137

- 137 -
000729AG
8 - Maintenance
- Code on display
- Error message
- Signal
Name of Alarm and Cause Solution
- W026 *
- AFDD user reset
- No LED
*not visualised on dis-
play
Reset of the Arc Fault error:
Manual reset of the Arc Fault error; this operation can
be made through the display or advanced conguration
software.
• The reset of the Arc Fault error is done directly by the cus-
tomer/installer and is not an error. The information is only saved
on the historic record of the events memorized by the inverter
- W027 *
- Latch-Manual reset
- No LED
*not visualised on dis-
play
Resetting of the Latch alarm conditions:
Manual reset of the Latch alarm conditions; this opera-
tion can be made through the display or advanced con-
guration software.
• The reset of the Latch alarm conditions is done directly by
the customer/installer and is not an error. The information is
only saved on the historic record of the events memorized by
the inverter
- W046
- Grid conn. fault
- Alarm LED
Connection to the grid unsuccessful
The alarm is logged when a Missing grid or Input UV
error occurs or due to the manual disconnection of the
inverter during the grid connection sequence.
• Once the error occurs, the inverter tries to return to normal
operation.
If the problem persists after a number of attempts to connect
the inverter, switch the inverter off and then on again.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- W047
- Update Incomplete
- Alarm LED
FW update method unsuccessful
The alarm occurs when a rmware update has not
been completed.
• Complete any pending rmware updates.
- If the problem persists once the rmware updates have been
completed, switch the inverter off and on again.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- W048
- Periodic GridOff
- Alarm 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 memorized
by the inverter
- W058
- System Frozen
- Alarm 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.
- E001
- Input OC
- Alarm 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
- Alarm 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
- Alarm 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
- Alarm 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.