ABB UNO-DM-1.2-TL-PLUS, Руководство пользователя

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- 179 -
000700CG
8 - Maintenance
- Code on display
- Error message
- Signal
Name of Alarm and Cause Solution
- E025*
- Riso Low
- Alarm LED
*not visualised on dis-
play
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 con-
nect to the grid and shows the “Riso Low” error. The
causes may be:
- PV panel(s) damaged;
- Junction box(es) of the panels not correctly sealed, so
as to permit infiltration by water and/or humidity;
- Problems in connections between panels (not per-
fectly fit);
- Poor quality of cable joints;
- Presence in the DC section of unsuitable or damaged
overvoltage surge arresters outside the inverter (re-
duced ignition voltage compared to the characteristics
of the strings of the PV generator);
- Presence of humidity inside any junction box
• Measure the insulation resistance using a megohmmeter posi-
tioned in the photovoltaic field (positive terminal short-circuited
at the negative pole) compared to ground. The measurement is
strongly influenced by the environmental 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 gen-
erator to identify and eliminate the problem.
- If the value measured is higher than 1 megaohm and the error
signal persists, contact customer assistance.
- E026
- Vref Error
- Alarm LED
Internal reference voltage outside of range:
Wrong measurement of reference voltage inside in-
verter
• 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.
- E027
- Error Meas V
- Alarm LED
Grid voltage outside of range:
Error in the internal measurement of grid voltage (set
by law) in order to have a redundant measurement (2
measurements on the same parameter made by two
different circuits)
• 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.
- E028
- Error Meas F
- Alarm LED
Grid frequency outside of range:
Error in the internal measurement of grid frequency
(set by law) in order to have a redundant measurement
(2 measurements on the same parameter made by two
different circuits)
• 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.
- E029
- Mid Bulk OV
-
Alarm LED
Internal overvoltage on the measurement of the
“Mid bulk”:
Error inside the inverter (only triphase models)
• 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.
- E030
- Error Meas Ileak
- Alarm LED
High leakage current (DC side):
Error in the internal measurement (made when the
inverter is grid connected) of the leakage current of
the DC side (PV generator) compared to ground (set
by law) in order to have a redundant measurement (2
measurements on the same parameter made by two
different circuits)
• 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.
- E031
- Error Read V
- Alarm LED
Output relay damaged:
Measurement of internal voltage on heads of the out-
put relay outside of range. There is too great a differ-
ence in voltage between the input and output of the grid
connection relay.
• 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.
- E032
- Error Read I
- Alarm LED
Imbalanced output currents:
Measurement of the imbalance in the output voltage
(carried out across the three phases) outside of range
(only in triphase models)
• 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.
- E033
- UTH
-
Alarm LED
Low ambient temperature:
Temperature outside the inverter below -25°C
• Wait for the temperatures to which the inverter is exposed to
return to the operating range.
- If the problem persists, contact customer assistance. Remem-
ber to wait the time needed to allow the inverter to warm up
- E034
- Interlock fail
- Alarm LED
“IGBT” circuitry not ready:
Error inside the inverter
• 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.
- E035*
- Remote Off
- Alarm LED
*not visualised on dis-
play
Inverter awaiting “remote ON” command:
The inverter has been switched off remotely (remote
OFF) and remains awaiting the signal which will switch
it back on (Remote ON)
• Switch the inverter back on remotely. If the unit does not
switch back on, disable the remote off/on function and switch
the equipment off completely and subsequently switch it back
on.
- If the problem persists (once the Remote ON/OFF function
from the display has been reactivated), contact customer as-
sistance.