SMA SUNNY BOY - Manual (Page 21)

SMA Solar Technology AG Operating Modes
User Manual SB_SMC-BEN092840 21
3.4.7 The yellow LED blinks 5 times
Device 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 5 brief consecutive blinks. This code is emitted 3 times
in succession. If after this the fault is still present, the fault signal starts over again.
For all transformerless devices this blink code can occur in combination with the display warning
(with the exception of SMC 9000TL(RP)-10, 10000TL(RP)-10,
11000TL(RP)-10, for which the warning is ) and is caused by a fault
in the insulation monitoring system.
Correction of error by installer
If the device failure has a severe negative impact on normal operation, you must contact
your installer, who will check the inverter and the entire plant installation. It is essential to
ensure that devices without transformers (with "TL" in the device name) are correctly
grounded!