7 Commissioning
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 57
4. Connect the DC connector to the inverter in its original position.
☑ The DC connectors snap into place.
5. Ensure that all DC connectors are securely in place.
6. Turn the DC load-break switch of the inverter to
position I.
7. Switch on the AC circuit breaker.
8. If the green and red LEDs flash simultaneously during initial commissioning, operation is
stopped because no country data set has been set yet. For the inverter to begin operation, the
configuration must be completed and a country data set must be set.
9. If the green LED is still flashing, the conditions for activating feed-in operation are not yet met.
As soon as the conditions for feed-in operation are met, the inverter starts with feed-in
operation and, depending on the available power, the green LED will light up continuously or
it will pulse.
10. If the red LED lights up, an event has occurred. Find out which event has occurred and, if
necessary, initiate countermeasures.
11. Ensure that the inverter feeds in correctly.
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