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10 Troubleshooting
Lethal voltages are present inside the inverter when a fault occurs.
Only qualified personnel can perform the troubleshooting described in this
chapter. Qualified means that the operator has received professional training on
devices troubleshooting.
Do not perform any troubleshooting other than that specified in this manual.
Respect all safety instructions during troubleshooting.
Disconnect all AC and DC Main Switches and external power supplies before
troubleshooting.
Please contact Sungrow if voltage withstanding test is required during
troubleshooting.
Should any questions or doubts arise that are not covered by this manual, please contact
us.
If you provide our customer service assistant with the following information, it will be of
great help for us to diagnose and solve the problem in your system:
Type of inverter
Serial number of the inverter
Manufacturer, model and configuration of the PV arrays connected to the inverter
Inverter communication solution
Fault and brief description of the fault phenomenon
A picture of the fault if necessary
10.1 Fault Checking
If any power output anomaly is observed, you may check the following items before
contacting Sungrow.
Open-circuit voltage of the PV arrays
State of the emergency stop button
Power limitation state
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