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How to troubleshoot low production on PVxxx S series inverters?

Inverter was not making normal production level and array checked out fine
Product Line:
PVxxx S series
One of the F4-F6 fuse might be bad
First, perform LOTO then check at the DC contactor located on the right door of the inverter. Check for looseness on the connection of the wires going into the contactor.
Next, check the fuses F4, F5 and F6. If anyone of them are bad, then this can cause the power production to be much lower than normal.
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