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- 158 -
001058AG
8 - Maintenance
- Error code
- Error message
- Warning
Name of Alarm and Cause
Solution
- 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. You
must remember to wait for the time necessary 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
Inverter awaiting “remote ON” command:
The inverter has been switched off remotely (remote
OFF) and remains in waiting state for the signal that
will switch it on again (remote ON).
• Switch the inverter back on remotely. If the unit does not
switch on, disable the remote on/off function and switch the
equipment off completely and then switch it on again.
- If the problem persists (once the Remote ON/OFF function
has been reactivated), contact customer assistance.
- E036
- Vout Avg error
-
Yellow LED
Average of the measurements of grid voltage
outside 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 a grid impedance that
is too high. 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 inverter 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
voltage. If the operator authorises a change to the inverter's
parameters, agree the new limits with customer assistance.
- E037
- Riso Low
-
Red LED
Low value of the isolation resistance (only with
the “Amorphous” mode activated):
This error can appear only if the “Amorphous” mode
is enabled. This function is enabled only in inverters
equipped with grounding kit and is used to monitor
the voltage at the ends of the grounding resistor. The
error appears when the voltage at the ends of the
resistor connected between ground and 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
inverter
• Measure the isolation resistance using a megohmmeter
positioned in the photovoltaic array (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 generator to identify and eliminate the problem.
- If the value measured is higher than 1 megaohm and the
error signal persists, contact customer assistance.
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
-
Yellow LED
Arc Fault protection activated:
Possible photovoltaic arc detected on the DC side.
• 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.
E051
- Safety mem. Fault
-
Yellow LED
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.
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
between 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.