SMA STP 12000TL-US - Manual (Page 62)

6. Switch on all DC disconnectors between the inverter and the PV array.
7. Switch on the circuit breaker and all AC disconnectors.
☑ The green LED is glowing. Feed-in operation begins.
✖ Green LED is flashing?
The DC input voltage is still too low.
• Once the DC input voltage is sufficiently high, feed-in operation begins.
✖ The red LED is glowing?
There is probably an error.
• Rectify the error (see Section 10 "Troubleshooting", page 43).
11 Recommissioning the Inverter SMA Solar Technology AG
Installation Manual STP12-24TL-US-IA-en-16 62