SMA SSM-U-1615 - Manual (Page 50)

LED Status Cause and corrective measure
COM (yellow) Off* At present no data exchange in progress.
On At present data exchange in progress.
flashing At present no data exchange in progress.
* If the LED ERR is on, an error has occurred.
9.1.2 LEDs of the Network Connection
LED Status Cause and corrective measure
LK/ACT (green) Off No network connection established.
The DC subdistribution is not connected to the volt-
age supply.
Corrective measures:
• Connect the DC subdistribution to the voltage
supply.
No network connection established.
The network cable is not properly connected to the
DC subdistribution or other devices in the communica-
tion bus.
Corrective measures:
• Ensure that the network cables are correctly
connected to the DC subdistribution (see
Section 6.4, page 36).
• Ensure that the network cables are correctly
connected to the other devices in the
communication bus.
No network connection established.
One or more network components, network cables or
connectors are defective or damaged.
Corrective measures:
• Replace the defective or damaged network
components, network cables or connectors.
on Network connection established.
flashing Network connection established.
Data is being sent or received.
SPEED (yellow) Off Network connection established.
The data transfer rate is up to 10 Mbit/s.
on Network connection established.
The data transfer rate is up to 100 Mbit/s.
9 Troubleshooting SMA Solar Technology AG
Operating Manual SSMUXX15-BE-en-10 50