SMA Solar Technology AG
Commissioning
Installation Guide
SB11_17-IEN084820
29
Feeding Operation
After a fault-free grid connection of the Sunny Boy, it takes approximately one minute until the green
LED is continuously on. The blink codes shown before only have the purpose of indicating the
initialization of the Sunny Boy and the process of controlling whether the power supply requirements
are fulfilled.
Disturbance or Fault
If the Sunny Boy detects a disturbance or fault, this is indicated through a blink code of the yellow
and, where applicable, the red LEDs.
For example, if the yellow LED glows for 5 seconds immediately after connection, then goes out for 3
seconds and then flashes briefly twice, there is a grid fault. This could be because either the AC cable
has not yet been connected correctly or the line circuit breaker has not yet been switched on.
Explanation of the Blink Codes
For a detailed description of the blink codes, see the provided user manual of the Sunny
Boy.
The green LED is
continuously on
The yellow LED flashes twice in
succession
LED on
LED off
