110
12.4 Other Fault and Troubleshooting
F
Fa
au
ulltt
P
Po
ossssiib
blle
e R
Re
ea
asso
on
n
M
Me
ea
assu
urre
ess
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.
System Manual
Summary of Contents for SG3125HV-20
Page 2: ......
