Commissioning the Inverter

Qualified person

Requirements:

  • The inverter must be correctly mounted.
  • The circuit breaker must be correctly rated and mounted.
  • All cables must be completely and correctly connected.
  • Unused DC inputs must be sealed using the corresponding DC connectors and sealing plugs.
  • The country data set must be set correctly for the country or the purpose.

Procedure:

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  1. Insert the lower enclosure lid from above and flip it down. The screws must protrude from the lower enclosure lid.
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  2. Tighten all screws of the lower enclosure lid using an Allen key (AF 3) in the order 1 to 6 (torque: 2 Nm ± 0.3 Nm).

  3. If the ESS is available, plug it in. The ESS must be aligned parallel to and flush with the enclosure.

  4. Currents in the DC cabling after plugging in the ESS

    After plugging in the ESS, DC currents may occur in the DC cabling, even when there is no AC-side supply. This is not an error but normal behavior of the inverter when in operation.

  5. Attach the supplied warning labels so that they are clearly visible on the disconnection point on the AC side.
  6. Switch on the circuit breaker.
  7. If an external DC load-break switch is installed, switch it on.
  8. If the multifunction relay is used, connect the supply voltage to the load.
  • All three LEDs start to glow and the start-up phase begins. The start-up phase may take several minutes.

    • Self-test in accordance with CEI 0-21 during commissioning (applies to Italy only)

    The Italian standard prescribes that an inverter can only be operated on the utility grid after the disconnection times for overvoltage, undervoltage, minimum frequency and maximum frequency have been checked.

    1. If the country data set is configured to CEI 0-21 Int / CEI 0-21 internal, start the self-test as soon as the display shows the country data set ( > Starting the Self-Test).
  • The green LED is glowing and the display alternates automatically between the device type, firmware version, the serial number or designation of the inverter, the NetID, the configured country data set and the display language.

    • The green LED is flashing?

    Possible cause of error: the DC input voltage is still too low or the inverter is monitoring the utility grid.

    • Once the DC input voltage is sufficiently high and the grid-connection conditions are met, the inverter will start operation.

    The red LED is glowing and an error message and event number appear in the display?

    An error has occurred.

    <  Setting the NetID
    >  Self-Test in Accordance with CEI 0-21 for PV Systems ≤6 kW