SMA America, LLC
Messages
Installation Guide
SB20_25_30HFUS-eng-IUS113711
83
10.3 Error Messages
Appropriate display messages will be shown in the scrolling lines of the display if an event occurs.
By tapping on the enclosure lid the multi-line messages can be switched further.
If an error exists over a long period of time, the red LED begins to light and the multi-function relay is
switched (if available).
Event No. Display message and cause
Corrective measures
1
< Grid fault >
The grid voltage has over-stepped the
permissible range. This error can have the
following causes:
• The grid voltage at the connection
point of the Sunny Boy is too high.
• The grid impedance at the
connection point of the Sunny Boy is
too high.
For safety reasons, the Sunny Boy
disconnects itself from the grid.
• Check the grid voltage and the grid
connection to the Sunny Boy.
If the grid voltage lies outside the
acceptable range because of local grid
conditions, ask the grid operator if the
voltage can be adjusted at the feed-in point
or if he agrees to changes in the values of
the monitored operational limits.
If the grid voltage lies within the tolerance
range, yet this error is still being displayed,
contact the SMA Service Line.
2
< Grid fault >
The grid voltage has fallen below the
permissible range. This error can have the
following causes:
• Grid disconnected
• AC cable damaged
• The grid voltage at the connection
point of the Sunny Boy is too low.
For safety reasons, the Sunny Boy
disconnects itself from the grid.
• Check for tripping of the line circuit
breaker.
• Check the grid voltage and the grid
connection to the Sunny Boy.
If the grid voltage lies outside the
acceptable range because of local grid
conditions, ask the grid operator if the
voltage can be adjusted at the feed-in point
or if he agrees to changes in the values of
the monitored operational limits.
If the grid voltage lies within the tolerance
range, yet this error is still being displayed,
contact the SMA Service Line.
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