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Error Code - 166-168 (v3.18xx) or 18xA6-8 (v3.19xx)

CPU v3.18xx and below - Error Code - 166-168

CPU v3.19xx and above - Error Code - 18xA6-8

Error Message: Tz Over voltage Cap 1/2/3/


  • Verify that the inverter is set to the correct country.
  • Turn OFF the inverters in the site and verify AC grid voltage.
  • If the inverter is located far from the connection point to the grid, use a larger gauge AC wire.
  • Consult the grid operator.
  • If permitted by local authorities, change the grid protection values.

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