Sunny Boy 2000
Technical Description
SB2000-11:EE
- 31 -
SMA Regelsysteme GmbH
5 Operation and Failure Indication LEDs
The inverter normally operates automatically, without user interaction and without
any maintenance. The inverter automatically turns itself off when a grid feeding is not
possible (e.g. at night).
The Sunny Boy automatically starts grid feeding the next day once the solar radiation
is high enough. The inverter switches to idle mode if the radiation and the resulting
electric input energy are too low.
Each time the Sunny Boy starts up it runs a number of self test and safety proce-
dures which the user does not notice.
The user can obtain the inverters operating status from the three LEDs integrated in
the lid. (See Table 5.1: Operation indication overview).
The green LED ‘Operation’ describes the current operation of the inverter, see para-
graph ‘Operation Indicator’ starting on page 35.
The red LED warns the user that an ‘Earth Fault’ has occurred. A description of this
situation and what has to be done in that case is given in paragraph ‘Earth Fault In-
dicator’ starting on page 38.
The yellow LED ‘Failure’ indicates an internal or external failure that keeps the in-
verter from feeding the grid. The specific causes for this and how to avoid them are
described in paragraph ‘Failure Indicator’ starting on page 42.
