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10
Troubleshooting
If the inverter fails to output as expected or the power yield changes abnormally, check the
following items before consulting SUNGROW:
• The open-circuit voltage of PV arrays
• Whether the emergency stop button is pressed
• Whether the inverter limits the output of active power
If the problem still persists or there are any other questions, please contact SUNGROW. It
would be helpful if the following information is provided during a call:
• Model and S/N of the inverter and internal equipment
• Manufacturer and model of the upstream PV combiner box and PV modules that con-
nected to the inverter
• Communication and connection scheme of the inverter
• Fault information and a brief description of the fault
• Pictures of the fault occurrence site (if on-site conditions permit)
10.1 Inverter Troubleshooting
10.1.1 Viewing Fault/Alarm Information
View the fault and alarm information referring to "8.4.2 Viewing Fault Information" and "8.4.3
Viewing Alarm Information".
10.1.2 Check Method
There are three levels of anomalies:
• Important fault: The inverter fails, shuts down, and stops grid-connected power
generation.
• Secondary fault: Some parts of the inverter fail, but the inverter can still generate power
in a grid-connected state.
• Prompt for fault: The inverter works normally, but its output power decreases due to ex-
ternal factors.
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