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C01
1C5
5 - Troubleshooting
Display Message Causes
Solution
E025
Riso Low
Low insulation
resistance
Before connecting to the grid, the
inverter measures the insulation
resistance of the PV array com-
pared to ground. If the insulation
resistance measured by the in-
verter is less than 1 MOhm, the
inverter does not connect to the
grid and shows the “Riso Low” er-
ror. The causes may be:
- Damaged PV panel(s).
- Junction box(es) not properly
sealed, allowing water and /or
damp seepage ;
- Loose connections between
panels allowing humidity leak-
age;
- Poor quality cable junctions;
- Presence of unsuitable (trigger
voltage lower than the character-
istics of the PV array strings) or
damaged overvoltage surge ar-
resters outside the inverter in the
DC section.
- Presence of damp inside the
field panel, if there is one.
If possible, measure the insulation resistance us-
ing a megohmmeter positioned between the pho-
tovoltaic field (positive terminal short-circuited to
the negative pole) and ground (as described in the
relevant section: “checking the ground insulation of
the PV array”). If the measured value is less than 1
mega ohm, the photovoltaic array must be checked
by a technician/installer to identify and eliminate
the problem If the measured value is greater than
1 mega ohm and the error warning continues to be
present, contact customer service.
(Damp increases leakage and can therefore be the
cause of a reduction in insulation resistance).
E026
Vref Error
Bad internal
reference voltage
Wrong measurement of the ref-
erence voltage inside the equip-
ment.
Internal error that cannot be checked externally.
If the problem persists (even after switching the
inverter off and then on again), contact customer
service.
E027
Error Meas V
VGrid Measures
Fault
Error in the internal measurement
of the grid voltage (imposed by
regulations) to have a measure-
ment redundancy (2 measure-
ments on the same parameter
carried out by two different cir-
cuits).
This is an error inside the inverter that cannot be
checked externally. If the problem is persistent
(even after switching the inverter off and then on
again), contact customer service.
E028
Error Meas F
FGrid Measures
Fault
Error in the internal measurement
of the grid frequency (imposed by
regulations) to have a measure-
ment redundancy (2 measure-
ments on the same parameter
carried out by two different cir-
cuits).
This is an error inside the inverter that cannot be
checked externally. If the problem is persistent
(even after switching the inverter off and then on
again), contact customer service.
Содержание PVI-3.0-TL-OUTD-S-US
Страница 1: ...ABB solar inverters Product manual PVI 3 0 3 6 3 8 4 2 TL OUTD S US A 3 0 to 4 2 kW ...
Страница 16: ... 16 3005CC2 2 Installation location ...
Страница 32: ... 32 3007CC3 3 Mounting and wiring ...
Страница 62: ... 62 C011C5 5 Troubleshooting ...
Страница 66: ... 66 C012C6 6 Maintenance ...
Страница 72: ... 72 C013C7 7 Appendix Output power with one DC section operating ...