SMA SUNNY BOY - Manual (Page 12)

Operating Modes SMA Solar Technology AG
12 SB_SMC-BEN092840 User Manual
3.1 Activating the Display Illumination
The background illumination is switched on by tapping on the enclosure lid. Tapping again switches
the display on to the next message.
After 2 minutes, the illumination switches off automatically.
3.2 Initial Phase
3.2.1 All LEDs are on
Initialization
The inverter's on-board computer is now in the initializing
phase. The on-board power supply is present, but there is
insufficient energy for feeding the grid. Data transmission
is also not possible yet.
3.3 Normal Operation
If no LED, or only the green LED is on or blinking, the inverter is operating normally. If all 3 LEDs are
lit up simultaneously, this is also an indication of normal operation ("initialization"). All other signals
are a sign of faulty operation.
3.3.1 All LEDs are off
Overnight Shutdown
The inverter is in the so-called overnight shutdown mode.
This situation occurs if the inverter's input voltage is too
low both for feeding into the grid and for satisfying the on-
board voltage requirements.
If this operating mode occurs during a sunny day with
good irradiation, have the PV voltage checked by your
installer.
All LEDs are blinking
If during the initialization phase the energy fed into the inverter is not sufficient to power
the on-board computer, all LEDs are extinguished. After this, initialization restarts. If there
is very weak solar irradiation, the LEDs appear to blink. This apparent blinking indicates a
normal operating mode. No fault has occurred in the system.