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Displays and Messages
Grid Failure
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 SB3800U. Also
inspect the AC disconnect between the Sunny Boy and the grid.
CAUTION: Have the grid connection to the SB3800U checked
only by qualified personnel.
7-8
Yellow LED blinks
shortly twice
LED on
LED off
5 s
3 s
The signal is repeated 3 times and
then starts from the beginning.
WARNING: If opening the SB3800U is required, do so
only after disconnecting all sources of power and waiting
at least 5 minutes.
1 s
SMA America
SB3800U-12:SE2006
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