SMA Solar Technology AG 7 Commissioning
Installation Manual SB30-50TL-21-IA-en-21 57
7 Commissioning
7.1 Commissioning the Inverter
1. The following conditions must be fulfilled before commissioning:
– Correct mounting (see Section 5)
– Correct country setting (see Section 6.5.1)
– AC cable is correctly connected (electricity grid)
– Protective conductor is correctly connected (see Section 6.3.3)
– DC cables (PV strings) are correctly connected
– Unused DC inputs are closed using the corresponding DC connectors and sealing plugs
– All enclosure openings are closed
– The enclosure lid is securely screwed into place
– An external DC switch-disconnector is connected or, if applicable, the ESS is firmly in place
– The AC distribution is correctly installed
– The miniature circuit-breaker is correctly sized
2. Switch the miniature circuit-breaker on.
☑ Green LED is lit: commissioning successful.
or
☑ Green LED will flash if irradiation is insufficient: grid connection conditions have not yet been
reached. Wait for sufficient irradiation.
or
☑ Red LED is lit: a disturbance has occurred. Localise and eliminate the fault (see Section12
"Troubleshooting", page72).
3. If a multi-function relay is connected, switch on the supply voltage to the relay.
Self-test in accordance with CEI 0-21 during initial start-up (applies to Italy only)
The Italian standard prescribes that an inverter can only operate on the electricity grid after the
disconnection times for overvoltage, undervoltage, minimum frequency and maximum
frequency have been checked.
If the country data set is configured to CEI0-21 Int / CEI 0-21 intern, start the self-test
(see Section7.3.1 "Starting the Self-Test", page59).