Operation Manual 10. Troubleshooting
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10.2 Fault and Troubleshooting of LED
Disconnect the AC/DC voltage for 5 minutes. Reconnect the
AC/DC voltage.
If the LEDs keep off, repair or replace them.
Contact Sungrow if the malfunction cannot be removed following
these instructions.
No power supply to the inverter.
First, ensure the power supply and the grid-connection are
normal.
Disconnect the AC/DC voltage for 5 minutes and reconnect them.
If the LED keeps off, please contact Sungrow.
The grid is not in grid-connection state.
First, check all the AC/DC connection. Make sure, using
multimeter, that the DC input voltage exceeds the inverter startup
voltage.
Make sure the grid and parameters meet the requirements of safe
operation.
If the malfunction cannot be removed by following these
instructions, please contact Sungrow.
A fault is not removed yet.
Please refer to the touch screen for the detailed fault information
and take corresponding troubleshooting.
If the malfunction cannot be removed by following these
instructions, please contact Sungrow.
10.3 Fault and Troubleshooting on the LCD screen
This section is dedicated to the faults shown on the LCD, possible reasons and
troubleshooting. In case the fault cannot be removed following the instructions in this
section, please contact Sungrow.
DC voltage exceeds the max. DC voltage
Check the configuration of the PV array and reduce the open-circuit voltage of
the PV array
Please contact the installers of the PV arrays
The grid voltage is above the maximum grid voltage
Check the grid voltage (or if the grid-connected wire is too thin)
Inverter automatically reconnects to the grid once the grid voltage recovers
normal
The grid voltage is below the minimum grid voltage
Check the grid voltage
Check if the AC cables are securely connected.
Inverter automatically reconnects to the grid once the grid voltage recovers
normal
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