SMA Solar Technology AG
10 Troubleshooting
Installation Manual
SB13_21TL-IA-en-65
45
10 Troubleshooting
10.1 LED Signals
Description
Status
Explanation
Green LED
glowing
Operation
The specific status message is shown in the display
(see Section 10.2.2 "Status Messages", page 46).
flashing
Conditions for grid connection are not yet fulfilled.
Red LED
glowing
Earth fault or varistor defective
The specific fault or disturbance message is shown in the display
(see Section 10.2.3 "Errors, Disturbances, Warnings", page 47).
Yellow LED
glowing
Permanent operation inhibition
The specific fault or disturbance message is shown in the display
(see Section 10.2.3 "Errors, Disturbances, Warnings", page 47).
flashing
Fault or disturbance
The specific fault or disturbance message is shown in the display
(see Section 10.2.3 "Errors, Disturbances, Warnings", page 47).
All LEDs are flashing
If the DC voltage is very low in the start-up phase, all three LEDs go out and the start-up phase
recommences. If irradiation is very low, all three LEDs flash. This flashing indicates a normal
operating state. It does not mean that a fault has occurred.
All LEDs have gone out
If all three LEDs have gone out, the inverter is switched off because the ESS is not plugged in,
the external DC switch-disconnector is not switched on, or there is no irradiation.
