50 SB3-5TL-21-BE-en-10 Operating Manual
11 Recommissioning the Inverter SMA Solar Technology AG
6. If an ESS is used, the ESS has to be plugged in firmly. The ESS must be aligned parallel to and
flush with the enclosure.
7. If an external DC load-break switch is installed, switch it on.
8. Switch on the circuit breaker.
9. If the multi-function relay is used, switch on the load supply voltage, if necessary.
☑ The green LED is glowing and the display alternates between the device type, the firmware
version, the serial number or designation of the inverter, the NetID, the configured country data
set and the display language.
✖ Green LED is flashing?
Possible cause of error: the DC input voltage is still too low, or the inverter is monitoring the utility
grid.
• Once the DC input voltage is sufficiently high and the grid connection conditions are met,
the inverter will start operation.
✖ The red LED is glowing and an error message and event number appear in the display?
An error has occurred.
• Rectify the error (for troubleshooting see service manual at www.SMA-Solar.com).
Currents in the DC cabling after connecting the ESS
After connecting the ESS, DC currents may occur in the DC cabling, even when there is
no AC-side supply. This is not an error but normal behavior of the inverter when in
operation.
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