SMA SUNNY BOY - Manual (Page 16)

Operating Modes SMA Solar Technology AG
16 SB_SMC-BEN092840 User Manual
3.4.1 The red LED is continuously on
Insulation Fault or Defective Varistor
The red LED on the Sunny Boy / Sunny Mini Central is
permanently on. With this blink code it is irrelevant
whether the green or yellow LEDs are on or blinking. A
grounding error has occurred, or one of the thermally
monitored varistors on the DC input side is defective as a
result of overvoltage or ageing.
Sunny Mini Central 9000TL / 10000TL / 11000TL
Sunny Mini Central 9000TL / 10000TL / 11000TL with Reactive Power Control.
When the red LED lights up continuously, the inverter has detected a ground fault. A
separate blink code indicates a defective varistor or string fuse (see Section 3.4.2 "The
Red LED is blinking" (page 17)).
Inverter equipped with integrated grounding set
If the inverter is equipped with a "grounding set", a continuously lit red LED signals an
unwanted ground fault in the PV generator or a defect in the grounding set itself.
Further information on this subject can be found in the installation guide of the grounding
set.
Correction of error by installer
Contact your installer to have the error corrected. Instructions on correction errors can be
found in the inverter installation guide.