SMA SIC 50 - Manual (Page 39)

SMA Solar Technology AG Meaning of the Light Emitting Diodes (LEDs)
Installation Guide SIC50-IA-en-11 39
10 Meaning of the Light Emitting Diodes (LEDs)
10.1 Multicolored LED
10.2 Internal LEDs
LED Meaning
Green Operation
(PV voltage > battery voltage)
Red Fault/error
Orange Low PV voltage
(PV voltage < battery voltage)
Internal LEDs
The internal LEDs are located inside the charge
controller and are only visible to the installer.
Yellow
(ERROR) Yellow
(ERROR) Green (RXD) Green (TXD) Meaning
Is glowing Is glowing – – error/stop
– – – – charge controller is
charging
– – Is blinking – charge controller is
receiving data from
Sunny Island
– – – Is blinking charge controller is
transmitting data