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Fault - 1 - Blank Screen

Cause - 

  •  input voltage low/missing
  • Polarity reversed
  • Main board damaged

Solution - 

  • Test - DC switch off
  • Check PV connections
  • Check polarity
  • Check voltage > 120V Single, >350V three
  • Test - DC switch ON
  • Check voltage > 120V Single, > 350V three
  • If DC voltage is "0" replace inverter

Troubleshooting - Inverter is not receiving signal from DSP or a power board may be broken. Check the DSP signal interface and power board for any equipment faults. 

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