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11.4 Other Fault and Troubleshooting
Fault Possible Reason Measures
The inverter shuts down
shortly after start-up.
DC input voltage just
reaches the inverter start-
up voltage. Voltage will
decrease and the inverter
will stop when it is under
load.
Design the serial and
parallel connection in
accordance with the open
circuit voltage; increase the
input DC voltage; avoid
adopting the critical voltage
Failure to start or stop the
inverter via the LCD.
Communication malfunction
between the LCD display
and the DSP; LCD power
supply malfunction
Check the connection
between the LCD display
and the DSP when the
inverter is voltage-free
Failure to communicate with
PC.
Possible reasons are
various. Refer to the
"Measures".
Check if the address and
the Baud rate of the LCD
are the same as those of
PC.
Check to ensure the circuits
are properly connected and
if the RS485
communication is adopted,
the A and B ports are
connected correctly.
Check if the communication
converters are matched.
Communicate again after
replacing the converter.
The monitor software is
installed incorrectly. It is
recommended to reinstall
the software.
If all the above-mentioned
items are correct and this
fault continues, contact
Sungrow.
11 Troubleshooting System Manual
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