Growatt SPF-3500ES - Page 27

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For professional client, suggest deliverying some IGBT or Optocouplers to them and try to repair it.
Malfunction Reason:
Most of time, it is caused by DC-AC Circuit. Especially, IGBT, driving circuit etc.
Repairing Method:
a. please kindly turn to diode position on multimeter.
Fig.5 Diode Position