SMA CLUSTER CONTROLLER - Manual (Page 103)

Problem Cause and corrective measure
The login page does not open. The Cluster Controller is not connected to the voltage sup-
ply.
Corrective measures:
• Ensure that the three-pole plug for the voltage supply
is connected to terminal X1 of the Cluster Controller.
The voltage supply is reverse-connected or the power sup-
ply 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.
A firewall is blocking the connection.
Corrective measures:
• Adjust the firewall settings in order to allow the
required connection.
If the Cluster Controller is connected to the LAN via DHCP
and the voltage supply of the Cluster Controller was
briefly interrupted, it is possible that the DHCP server has
assigned the Cluster Controller a new IP address.
Corrective measures:
• Select the display view External communication
and read out the current IP address of the
Cluster Controller.
• Call up the IP address via the web browser.
18 Troubleshooting SMA Solar Technology AG / SMA America, LLC
User Manual 103 ClusterController-BA-en-14