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8 Disconnecting the Inverter from Voltage Sources SMA Solar Technology AG <br />Installation ManualSBxx-1SP-US-41-IA-xx-12 62 <br />3. Secure the DC load-break switch against <br />reconnection using a suitable padlock. <br />4. If the multifunction relay is used, switch off any supply voltage to the load. <br />5. Wait until the LEDs have gone out. <br />6. Unscrew all six screws of the enclosure lid of the Connection Unit and remove the enclosure lid <br />carefully towards the front (TX25). When doing so, note that the LED assembly in the <br />enclosure lid and the communication assembly in the inverter are connected via a ribbon <br />cable. <br />7. Pull the ribbon cable connecting the LED assembly in <br />the enclosure lid to the communication assembly out <br />of the jack located on the communication assembly. <br />8. Use a current clamp to ensure that no current is present in the DC conductors. <br />9. Ensure there is no voltage on the AC-out terminal block between L1 and N and L2 and N <br />using a suitable measuring device. To do this, stick the test probe in each rectangular opening <br />of the terminal. <br />10. Ensure there is no voltage on the AC-out terminal block between L1 and the equipment <br />grounding conductor and L2 and the equipment grounding conductor using a suitable <br />measuring device. To do this, stick the test probe in each rectangular opening of the terminal. <br />EN <br />G <br />L <br />I <br />S <br />H <br />534 S Sycamore St <br />- 10110979707/01/22