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- 144 -
000908AG
8 - Maintenance
- Error code
- Error message
- Warning
Name of Alarm and Cause
Solution
- E025
- Riso Low
-
(On)
Low value of insulation resistance:
Before connecting to the grid the inverter measures the
insulation resistance of the PV generator compared
to ground. Should the measurement of the insulation
resistance be below 1Mohm, the inverter does not
connect to the grid and shows the “Riso Low” error. The
causes may be:
- Damaged PV panel(s).
- Junction box(es) of the panels not correctly sealed,
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humidity;
- Problems in connections between panels (not
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- Poor quality of cable joints;
- Presence in the DC section of unsuitable or
damaged overvoltage surge arresters outside the
inverter (reduced ignition voltage compared to the
characteristics of the strings of the PV generator);
- Presence of humidity inside any junction box
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insulation resistance using a megohmmeter
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circuited at the negative pole) compared to ground. The
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conditions, so must be made under the same conditions in
which the error occurred.
- If the value measured is lower than 1 megaohm, a
check must be carried out by a technician/installer on the
photovoltaic generator to identify and eliminate the problem.
- If the value measured is higher than 1 megaohm and the
error signal persists, contact customer assistance.
- E029
- Mid Bulk OV
-
(On)
Internal overvoltage on the measurement of the
“Mid bulk”:
Error inside the inverter (only triphase models)
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- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E031
- Error Read V
-
(On)
Output relay damaged:
Measurement of internal voltage on heads of the
output relay outside of range. There is too great a
difference in voltage between the input and output of
the grid connection relay.
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- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E032
- Error Read I
-
(On)
Imbalanced output currents:
Measurement of the unbalance in the output voltage
(made across the three phases) outside of range (only
in three-phase models)
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- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E033
- UTH
-
(On)
Low ambient temperature:
Temperature outside the inverter below -25°C
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return to the operating range.
- If the problem persists, contact customer assistance. You
must remember to wait for the time necessary to allow the
inverter to warm up.
- E034
- Interlock fail
-
(On)
“IGBT” circuitry not ready:
Error inside the inverter
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- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
- E035*
- Remote Off
-
(On)
Inverter awaiting “remote ON” command:
The inverter has been switched off remotely (remote
OFF) and remains in waiting state for the signal that
will switch it on again (remote ON).
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switch on, disable the remote on/off function and switch the
equipment off completely and then switch it on again.
- If the problem persists (once the Remote ON/OFF function
has been reactivated), contact customer assistance.
- E037
- Riso Low
-
(On)
Low value of the insulation resistance (only with
the “Amorphous” mode activated):
This error can appear only if the “Amorphous” mode
is enabled. This function is enabled only in inverters
equipped with grounding kit and is used to monitor
the voltage at the ends of the grounding resistor. The
error appears when the voltage at the ends of the
resistor connected between ground and pole of the
photovoltaic generator exceeds 30V for more than 30
minutes or 120V for more than one second.
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two terminals of the grounding resistance installed inside the
inverter
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insulation resistance using a megohmmeter
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circuited at the negative pole) compared to ground. The
PHDVXUHPHQWLVVWURQJO\LQÀXHQFHGE\WKHHQYLURQPHQWDO
conditions, so must be made under the same conditions in
which the error occurred.
- If the value measured is lower than 1 megaohm, a
check must be carried out by a technician/installer on the
photovoltaic generator to identify and eliminate the problem.
- If the value measured is higher than 1 megaohm and the
error signal persists, contact customer assistance.
E049
- AC FF Error
-
(On)
Error in the “AC feed-forward” circuit:
Error inside the inverter
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- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
E067
- Charger - OV
-
(On)
Overvoltage of "battery charger" ("Charger" circuit):
Error inside the charger (battery unit). The alarm is
raised when the battery charger voltage exceeds
the overvoltage threshold (internal unchangeable
threshold).
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disconnected, contact customer assistance.
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