SMA Solar Technology AG
8 Commissioning
Installation Manual
STP5-9TL-IA-en-10
59
8 Commissioning
8.1 Commissioning the Inverter for the First Time
When commissioning the inverter for the first time, proceed as follows.
Requirements:
☐ The miniature circuit-breaker must be correctly rated.
☐ The inverter must be correctly mounted and closed.
☐ All cables must be correctly connected.
☐ Unused DC inputs must be sealed using the corresponding DC connectors and sealing plugs.
☐ The protective cover must be correctly mounted.
☐ The ESS must be securely plugged in.
1. Switch on the miniature circuit-breaker.
2. If a multi-function relay is used, switch on the load supply voltage.
☑ The start-up phase begins. All three LEDs are lit or flashing.
☑ The green LED is lit and the display alternates automatically between the firmware version,
the serial number of the inverter, the NetID, the IP address, the subnet mask, the configured
country data set and the display language.
✖ Is the green LED flashing?
Possible cause of the error: The DC input voltage is still too low.
• If the DC input voltage is sufficiently high, the inverter starts to operate.
✖ The red LED is lit and an error message and event number appear in the display?
• Eliminate the error (see Section 11 "Troubleshooting", page 68).
