18 Troubleshooting
18.1 LED States
18.1.1 Operation LEDs
Assignment of the Status LED
(
):
The status LED can display the following statuses:
• Status of the Cluster Controller
• Status of the connected inverters
• Status of the system communication
• Status of the grid management services
If the status LED is not glowing green after commissioning, refer also to the event log of the
Cluster Controller to determine the precise cause of the error. The details of each error are logged
in the event log (see Section 9.1, page 51).
LED
Status
Cause and corrective measure
All
off
The Cluster Controller is not connected to the volt-
age supply.
Corrective measures:
• Connect the Cluster Controller to the voltage
supply (see the Cluster Controller installation
manual).
The voltage supply is reverse-connected or the
power supply unit is defective.
Corrective measures:
• Ensure that the voltage supply is correctly
connected (see the Cluster Controller
installation manual).
• If the voltage supply is connected correctly,
replace the power supply unit.
Power (
) and status
(
)
Power glowing
red, status glow-
ing yellow or red
The voltage supply is too low.
Corrective measures:
• Ensure that the connected voltage supply is
sufficient (see the Cluster Controller
installation manual).
• If the problem persists, contact the Service
Power (
)
glowing green
The start procedure is complete. The Cluster Con-
troller is ready for operation.
18 Troubleshooting
SMA Solar Technology AG
User Manual
ClusterController-BA-en-15
90
