ABB UNO-DM-2.0-TL-PLUS Manual page 180

- Code on display
- Error message Name of Alarm and Cause
- Signal
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
- E036
grid voltage in the point connected to the inverter is too
- Vout Avg error
high. This may be caused by too high a grid impedance.
- Alarm LED
In the final 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
Error during the automatic check of the string
voltages (only in models with the "fuse-control"
board):
E046
In some inverter models it is possible to carry out the
- String self test fail
check test of the polarity of the strings connected to the
- No LED
input (e.g.:TRIO-20.0/27.6kW).
This error signal occurs when, during the test stage, an
inverted string is recorded
E049
Error in the "AC feed-forward" circuit:
- AC FF Error
Error inside the inverter
- Alarm LED
E050
Arc Fault protection activated:
- AFDD Activated
Possible photovoltaic arc detected on the DC side.
- GFI LED
E053 Arc Fault board autotest failed:
- AFDD Fault Problem detected during the AFDD board autotest
- Alarm LED phase.
E054 Arc Fault board communication error:
- AFDD comm. Fault
Error on the RS485 serial communication detected be-
- Alarm LED tween the inverter and the AFDD board.
E055
Arc Fault board parameter reading error:
- AFDD wrong conf.
Error in the parameter reading by the system.
- Alarm LED
Excessive temperature measured inside the invert-
E056
er's wiring box:
- Over Temp. (from
High internal temperature.
external box)
This error relates to the temperature measured on ex-
- Alarm LED
ternal boxes (e.g.:TRIO-20.0/27.6kW).
Input voltage (Vin) higher than booster voltage
E057 (Vbulk):
- Vbulk reading error The error occurs if the input voltage exceeds the Bulk
-
Alarm LED voltage (voltage on the DC-DC circuit inside the in-
verter)
E058 Error in the check of Pin vs Pout:
- Pin vs Pout check
The error occurs if the difference between the meas-
error ured value of input power and that of output power is
- Alarm LED greater than the limit imposed internally to the inverter.
E077
Error in the system configuration:
- Internal Error
Error inside the inverter
- Alarm LED
E078
Riso test error:
- Riso Test fail
Problem detected during the Riso test phase.
- Alarm LED
E079 Incorrect Phases connection
- Wrong Sequence
(Only triphase models) The phases have not been con-
- Alarm LED nected correctly to the AC output
Solution
• 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
• Section the inverter and check the polarity of the string(s)
which the inverter has recorded as inverted.
- Once all the strings have been correctly connected, activate
the system once again; the inverter will once again check the
correct polarity of the string inputs at the end of which it will
carry out the checks for the grid connection.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
• 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.
• If it is the first time this problem has occurred, press the ESC
button for 5 seconds and wait for the unit to restart.
- If the problem persists (once the inverter has been switched
off and back on again), contact customer assistance.
• 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.
• 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.
• 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.
• Check that the inverter is not exposed to direct sunlight. Wait
for the temperatures to which the inverter is exposed to return
to the operating range and for the inverter to cool down.
- If the problem (once the ambient temperature has returned to
the range) persists, contact customer assistance. Remember
to wait the time needed to allow the inverter to cool down
• It is necessary to measure the input voltage inside the inverter
with a voltmeter.
- If it is higher than the maximum voltage of the operating range,
the alarm is genuine and it is necessary to check the configura-
tion of the PV generator. If the voltage has also exceeded the
maximum input threshold the inverter could be damaged.
- If it is lower than the maximum voltage of the operating range,
the alarm is caused by an internal malfunction and it is neces-
sary to contact customer assistance.
• 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.
• 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.
• 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.
• Invert two of the phases of the network wiring to the AC termi-
nal block of the inverter.
- 180 -
8 - Maintenance