10 Troubleshooting
10.1 LED Signals
The LEDs indicate the operating state of the inverter.
LED Status Explanation
Green LED glowing Feed-in operation
If an event occurs during feed-in operation, the event mes-
sage is shown on the display (see Section10.3, page27
).
flashing The grid connection conditions are not met.
Red LED glowing Error
The display shows an error message and an event number
(see Section10.2, page21).
Blue LED glowing Bluetooth communication is active.
10 Troubleshooting
SMA Solar Technology AG
Service ManualSTP5-12TL-20-SG-en-1220
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