ABB UNO-DM-3.3-TL-PLUS Product Manual page 161

- Code on display
- Error message Name of Alarm and Cause
- Signal
Low "Bulk" voltage (DC-DC circuit):
- W011
The alarm (which is a warning and not an error) is gen-
- Bulk UV erated when the voltage at the heads of the bulk ca-
- Alarm LED pacitors does not reach the threshold for the operation
of the inverter (internal unchangeable threshold).
- W012 *
Battery Low:
- Batt. Low
The inverter displays the "Battery Low" message when
- Alarm LED
it records a voltage for the buffer battery which is too
*not visualised on dis-
low.
play
- W013 * Clock Fail:
- Clock Fail The alarm occurs when there is a difference of over 1
- Alarm LED lamp. minute in the time displayed compared to the internal
*not visualised on dis- time of the microprocessors and indicates a malfunc-
play tion of the clock circuit.
- W015 Disconnection due to Anti-Islanding:
- Island Detect.
The inverter has been improperly connected to an is-
- Alarm LED land grid.
- W017*
- String Err.
Error recorded in measuring string currents:
-
Alarm LED lamp.
Damaged string protection fuse(s)
* (only for models with
monitored string fuses)
- W018 *
Intervention of overvoltage surge arresters on DC
- SPD DC Err
side:
- Alarm LED lamp.
Damaged overvoltage surge arresters positioned on
* (only for models with
DC side
monitored SPD)
- W019 *
Intervention of overvoltage surge arresters on AC
- SPD AC Err
side:
- Alarm LED lamp.
Damaged overvoltage surge arresters positioned on
* (only for models with
AC side
monitored SPD)
- W022 *
- Reactive power Variation in means of managing reactive power:
mode changed Variation in the means of managing reactive power;
-
No LED this change can be made through the display or ad-
*not visualised on dis- vanced configuration software.
play
- W023 *
Variation in the inverter's date and time:
- date/time changed
Variation of the inverter's date and time; this change
- No LED
can be made through the display or advanced configu-
*not visualised on dis-
ration software.
play
- W024 * Zeroing of the statistical energy data memorised in
- Energy data reset the EEPROM:
- No LED Reset of the energy data saved in the inverter; this
*not visualised on dis- operation can be handled through the display or ad-
play vanced configuration software.
Solution
• Raise the value of the activation voltage (Vstart) if the prob-
lem at the time of the inverter's grid connection (Using the for-
mulas 0,7*Vmp,stc or 0,6*Voc,stc).
• If the problem occurs in the morning, try to raise the value of
the activation voltage (Vstart) (Using the formulas 0,7*Vmp,stc
or 0,6*Voc,stc).
• 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
• Check that the date/time are set correctly and, if they are not,
set them.
Subsequently arrange to completely switch off the inverter (on
both AC and DC) and wait a few minutes.
Finally, restart the inverter and check whether the date/time are
now correctly set or whether they have reset to 01/01/2000.
In this case replace the battery with the inverter completely
switched off (section AC and DC side) being careful to maintain
the polarity
• completely switch off the inverter (on both AC and DC) and
wait a few minutes.
Finally, restart the inverter and check whether the date/time are
now correctly set or whether they have reset to 01/01/2000.
In this case replace the battery with the inverter completely
switched off (section AC and DC side) being careful to maintain
the polarity.
- If the alarm repeats persistently, contact customer assistance.
• Check that the grid to which the inverter is connected is not
an island grid.
- If the grid to which the inverter is connected is an island grid,
switch the inverter off and then on again: if the problem persists,
contact customer assistance.
• Check with a multimeter the state of the fuses (positioned on
the fuse boards).
- If one or more fuses is open, arrange to replace them and
check that the input current on the string(s) does not exceed
the rating of the fuses (should parallel strings have been made
outside the inverter).
- If there are no damaged string fuses and the inverter contin-
ues to show the alarm message check whether the settings
to be made through the Aurora Manager software are correct
(presence or absence of one or more input strings).
• Observe the inspection window on each surge arrester (DC
side). If it is red, the surge arrester is damaged and the car-
tridge must be replaced.
- If the alarm status persists, even if all the surge arresters have
a green inspection window, contact customer assistance.
• Observe the inspection window on each surge arrester (AC
side). If it is red, the surge arrester is damaged and the car-
tridge must be replaced.
- If the alarm status persists, even if all the surge arresters have
a green inspection window, contact customer assistance.
The variation in the means of managing reactive power is done
directly by the customer/installer and is not an error. The infor-
mation is only saved on the historic record of the events memo-
rised by the inverter
• The variation in the inverter's date and time 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
The zeroing of the partial energy values memorised by the in-
verter 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
• The notice may also occur on substitution of the Memory Card
where the statistical production data is saved
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8 - Maintenance