SMA SUNNY BOY - Manual (Page 18)

Operating Modes SMA Solar Technology AG
18 SB_SMC-BEN092840 User Manual
3.4.4 The yellow LED blinks twice
Grid fault
The yellow fault LED lights up for 5 seconds when the fault occurs, and then starts emitting the
following blink code. 3 seconds off and then 2 brief consecutive blinks. This code is emitted 3 times
in succession. If this fault is still present, the fault signal starts over again.
With this fault signal the inverter indicates a grid fault which can have the following causes:
• Grid undervoltage (voltage drop protection)
• Grid overvoltage (voltage rise protection)
• Grid underfrequency (frequency decrease protection)
• Grid overfrequency (frequency increase protection)
• Grid frequency change ("dFac")
• Voltage increase protection activated
• Faulty grid connections, e.g. N and L swapped or PE not connected
(SMC 9000TL(RP) / 10000TL(RP) / 11000TL(RP): Display message )
• In systems which consist of 3 or more Sunny Mini Centrals, the Power Balancer has detected a
fault.
Correction of error by installer
Contact your installer to have the following points checked:
• Check whether there is a general power failure (check function of other energy
consumers).
• Check the fuse of the inverter power supply.
• Check whether the circuit breaker is switched on.
• Check the inverter's grid connection.