Troubleshooting; Inverter Troubleshooting; Viewing Fault/Alarm Information; Check Method - Sungrow SG1100UD System Manual

11 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 PVS and PV modules that connected 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)

11.1 Inverter Troubleshooting

11.1.1 Viewing Fault/Alarm Information

View the fault and alarm information referring to
Viewing Alarm

11.1.2 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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Information".
"8.4.2 Viewing Fault Information" and "8.4.3