ABB UNO-2.0-TL-OUTD - Page 112

- 112 -
000515AG
8 - Maintenance
- Code on display
- Error message
- Signal
Name of Alarm and Cause Solution
- E027
- Error Meas V
-
Yellow 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
-
Yellow 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
-
Yellow 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
-
Yellow 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
-
Yellow 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
-
Yellow 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
-
Yellow 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
-
Yellow 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
-
Yellow 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.
- E036
- Vout Avg error
-
Yellow LED
Average of the measurements of grid voltage out-
side of range:
The average value of the grid voltage (sampled every 10
minutes) does not fall within the permitted ranges. The
grid voltage in the point connected to the inverter is too
high. This may be caused by too high a grid impedance.
In the nal stage of the timeout, the inverter limits the
power to check whether the grid voltage has stabilised
into regular parameters. If this does not happen, the in-
verter disconnects from the grid
• Check the grid voltage in the connection point to the inverter.
- If the grid voltage differs from the range due to the conditions
of the distribution grid, ask the operator to adjust the grid volt-
age. If the operator authorises a change to the inverter's param-
eters, agree the new limits with customer assistance
- E037
- Riso Low
-
Red LED
Low value of the insulation resistance (only with
the “Amorphous” mode activated):
This error can occur only should the “Amorphous”
mode be on. This function is on only in inverters
equipped with a grounding kit and serves to monitor
the voltage at the heads of the grounding resistance.
The error occurs when the voltage at the heads of the
resistance connected between ground and the pole of
the photovoltaic generator exceeds 30V for more than
30 minutes or 120V for more than one second.
• Check for the presence and correct contact between the two
terminals of the grounding resistance installed inside the in-
verter
• Measure the insulation resistance using a megohmmeter posi-
tioned in the photovoltaic eld (positive terminal short-circuited
at the negative pole) compared to ground. The measurement is
strongly inuenced 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.
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