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Fault - 302


PV1 and PV2 insulation resistance to the ground exceeds the set value.


  1. Check whether the PV connection cables are intact. 
  2. Check whether the ambient humidity of PV components is too high.
  3. Check whether the "PE" cable and the N cable are well-contacted.
  4. Wait until the inverter reverters to normal
  5. Contact Sungrow if fault reoccurs.

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