Displays and Messages LED Fault Indicators
7-8 SMA America SB3000US-4000US-11-SE1607
Grid Failure
5s
3s 1s
LED on
LED off
Yellow LED blinks
shortly twice
The signal is repeated 3 times and
then starts from the beginning.
The yellow LED is on for 5 seconds, out for 3 seconds and then blinks twice. The
code is repeated 3 times. This code sequence will repeat as long as there is a grid
fault condition.
This code can be caused by any of the following conditions:
• Low Grid Voltage (<Vac Min)
• High Grid Voltage (>Vac Max)
• Low Grid Frequency (< fac Min)
• High Grid Frequency (>fac Max)
• Rapid change in grid frequency or voltage
Check the condition of the grid at the AC terminal blocks within the Sunny Boy. Also
inspect the AC disconnect between the Sunny Boy and the grid.
CAUTION: Have the grid connection to the Sunny Boy
checked only by qualified personnel.
WARNING: If opening the Sunny Boy is required,
do so only after disconnecting all sources of power
and waiting at least 5 minutes.
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