ABB UNO-2.0-TL-OUTD - Page 113

- 113 -
000515AG
8 - Maintenance
- Code on display
- Error message
- Signal
Name of Alarm and Cause Solution
E046
- String self test fail
-
No LED
Error during the automatic check of the string
voltages (only in models with the “fuse-control”
board):
In some inverter models it is possible to carry out the
check test of the polarity of the strings connected to the
input (e.g.:TRIO-20.0/27.6kW).
This error signal occurs when, during the test stage, an
inverted string is recorded
• 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.
E049
- AC FF Error
-
Yellow LED
Error in the “AC feed-forward” circuit:
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.
E050
- AFDD Activated
-
Red LED
Arc Fault protection activated:
Possible photovoltaic arc detected on the DC side.
• If it is the rst 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.
E053
- AFDD Fault
-
Yellow LED
Arc Fault board autotest failed:
Problem detected during the AFDD board autotest
phase.
• 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.
E054
- AFDD comm. Fault
-
Yellow LED
Arc Fault board communication error:
Error on the RS485 serial communication detected be-
tween the inverter and the AFDD board.
• 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.
E055
- AFDD wrong conf.
-
Yellow LED
Arc Fault board parameter reading error:
Error in the parameter reading by the system.
• 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.
E056
- Over Temp. (from
external box)
-
Yellow LED
Excessive temperature measured inside the invert-
er's wiring box:
High internal temperature.
This error relates to the temperature measured on ex-
ternal boxes (e.g.:TRIO-20.0/27.6kW).
• 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
E057
- Vbulk reading error
-
Yellow LED
Input voltage (Vin) higher than booster voltage
(Vbulk):
The error occurs if the input voltage exceeds the Bulk
voltage (voltage on the DC-DC circuit inside the in-
verter)
• 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 congura-
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.
E058
- Pin vs Pout check
error
-
Yellow LED
Error in the check of Pin vs Pout:
The error occurs if the difference between the meas-
ured value of input power and that of output power is
greater than the limit imposed internally to 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.
E077
- Internal Error
-
Yellow LED
Error in the system conguration:
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.
E078
- Riso Test fail
-
Yellow LED
Riso test error:
Problem detected during the Riso test phase.
• 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.
E079
- Wrong Sequence
-
Yellow LED
Incorrect Phases connection
(Only triphase models) The phases have not been con-
nected correctly to the AC output
• Invert two of the phases of the network wiring to the AC termi-
nal block of the inverter.
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