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- 175 -
000700CG
8 - Maintenance
- Code on display
- Error message
- Signal
Name of Alarm and Cause
Solution
- W011
- Bulk UV
-
Alarm LED
Low “Bulk” voltage (DC-DC circuit):
The alarm (which is a warning and not an error) is gen-
erated when the voltage at the heads of the bulk ca-
pacitors does not reach the threshold for the operation
of the inverter (internal unchangeable threshold).
• 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
- W012
*
- Batt. Low
-
Alarm LED
*not visualised on dis-
play
Battery Low:
The inverter displays the “Battery Low” message when
it records a voltage for the buffer battery which is too
low.
• 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
- W013
*
- Clock Fail
-
Alarm LED flash.
*not visualised on dis-
play
Clock Fail:
The alarm occurs when there is a difference of over 1
minute in the time displayed compared to the internal
time of the microprocessors and indicates a malfunc-
tion of the clock circuit.
• 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.
- W015
- Island Detect.
-
Alarm LED
Disconnection due to Anti-Islanding:
The inverter has been improperly connected to an is-
land grid.
• 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.
- W017*
- String Err.
-
Alarm LED flash.
* (only for models with
monitored string fuses)
Error recorded in measuring string currents:
Damaged string protection fuse(s)
• 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).
- W018
*
- SPD DC Err
-
Alarm LED flash.
* (only for models with
monitored SPD)
Intervention of overvoltage surge arresters on DC
side:
Damaged overvoltage surge arresters positioned on
DC side
• 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.
- W019
*
- SPD AC Err
-
Alarm LED flash.
* (only for models with
monitored SPD)
Intervention of overvoltage surge arresters on AC
side:
Damaged overvoltage surge arresters positioned on
AC side
• 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.
- W022 *
- Reactive power
mode changed
-
No LED
*not visualised on dis-
play
Variation in means of managing reactive power:
Variation in the means of managing reactive power;
this change can be made through the display or ad-
vanced configuration software.
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
- W023 *
- date/time changed
-
No LED
*not visualised on dis-
play
Variation in the inverter's date and time:
Variation of the inverter's date and time; this change
can be made through the display or advanced configu
-
ration software.
• 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
- W024 *
- Energy data reset
-
No LED
*not visualised on dis-
play
Zeroing of the statistical energy data memorised in
the EEPROM:
Reset of the energy data saved in the inverter; this
operation can be handled through the display or ad-
vanced configuration software.
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