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7 CommissioningSMA Solar Technology AG <br />Installation Manual SBxx-1SP-US-41-IA-xx-12 53 <br />7.2 Commissioning the Inverter <br />Requirements: <br />☐ The AC circuit breaker must be correctly rated and mounted. <br />☐ A means of disconnecting the inverter from the PV array must be present. <br />☐ The inverter must be correctly mounted. <br />☐ All conductors must be correctly connected. <br />☐ Unused enclosure openings must be sealed tightly with sealing plugs. <br />Procedure: <br />1. Lead the enclosure lid to the Connection Unit and <br />plug the ribbon cable into the socket on the <br />communication assembly. <br />2. Ensure that the ribbon cable is securely plugged into the sockets at both ends. <br />3. Position the enclosure lid of the Connection Unit on the enclosure and tighten all 6 screws <br />crosswise (TX 25, torque: 3 Nm ± 0.3 Nm (26.55 in-lb ± 2.65 in-lb)). <br />4. Turn the DC load-break switch of the inverter to <br />position I. <br />5. Switch on the AC circuit breaker. <br />☑ All three LEDs light up and the display is illuminated. The start-up phase begins. <br />☑ After approximately 90 seconds, all three LEDs will go out again and the display will <br />show a succession of different messages with inverter data. <br />☑ Depending on the available power, the green LED pulses or is continuously illuminated. <br />The inverter is feeding in. <br />6. If the LEDs do not start to glow and the display remains dark, the ribbon cable between the <br />assembly in the enclosure lid and the communication assembly in the inverter is most likely not <br />properly plugged in. Ensure that the ribbon cable is securely plugged into the sockets at both <br />ends. <br />EN <br />G <br />L <br />I <br />S <br />H <br />534 S Sycamore St <br />- 10110979707/01/22