An Optimizer Is Offline And The Impedance Is Abnormal (R1 Is Much Greater Than N1) - Huawei SUN2000-450W Series Troubleshooting Manual

SUN2000-450W and SUN2000-600W-P Series
Troubleshooting Guide
4.
3.4.5 An Optimizer Is Offline and the Impedance is Abnormal (R1 Is
Much Greater Than N1)
Symptom: The measured impedance of the PV string where the offline optimizer is located
is infinite. After the inverter begins to work in on-grid mode, the PV string current is always
0.
Cause: A disconnection occurs in the PV string.
Issue 01 (2024-1-2)
After the upgrade for each PV string is successful, connect all the PV strings to the
inverter and search for optimizers again.
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