9 Recommissioning the Inverter SMA Solar Technology AG
44 SB13_21TL-IA-en-65 Installation Manual
9. Switch the miniature circuit-breaker on.
10. If an external DC switch-disconnector is installed, switch it on.
☑ The start-up phase begins.
☑ The green LED is on and the display consecutively shows the device type, the firmware
version, the configured country data set.
✖ Green LED flashing
Possible cause of error: the DC input voltage is still too low or the inverter is checking the
electricity grid.
• Once the DC input voltage is sufficiently high and the grid connection conditions are met,
the inverter starts operation.
✖ Red LED on
The inverter has detected an earth fault or one of the varistors is defective.
• Eliminate the error (see Section10.5 "Red LED Permanently On", page54).
✖ Yellow LED flashing
• Rectify the fault (see Section10 "Troubleshooting", page45).
8.
Damage to the inverter due to moisture and dust penetration
If the ESS is not plugged in or incorrectly plugged in during operation, moisture and dust can
penetrate the inverter. If the ESS is not correctly plugged in, the ESS contacts may be subject to
wear, or the ESS may detach from the socket. This can result in yield loss and damage to the
ESS.
Always plug the ESS in as follows:
• Firmly plug the ESS in until it is flush with the enclosure.
• Ensure that the gap between the ESS and the enclosure is no more than 1 mm.
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