SMA America, LLC
Multicluster Operation
Technical Description
SI5048U-TUS121440
141
16.3 Switching a Multicluster System On and Off
16.3.1 Activation / Startup
Switching on a Multicluster system can only take place at the master of the main cluster. The extension
clusters will be started automatically after starting the main cluster. A requirement is that the DC circuit
breakers of all Sunny Island inverters in the extension cluster are set to ”ON”.
Proceed as follows:
1. Carry out steps 1 - 4 in section 9.1 ”Switching on” (page 72) on the master of the main cluster.
☑ The extension cluster masters show the message
shown here.
2. Press and hold <ENTER> on the main cluster
master.
☑ The remaining time is displayed as a bar.
☑ A peep is heard. The main master is on and in
operation. The green LED is on.
16.3.2 Stopping and Switching off
The Sunny Island Multicluster system can only be stopped at the master of the main cluster. Proceed
at the main cluster master as described in sections 9.2 ”Stopping (Standby)” (page 73) and
9.3 ”Switching off” (page 74)
.
Starting the Multicluster System
The Multicluster system is started once the main master has started. All extension clusters
follow the main master.
Occurrence of an Error
If the device displays an error message unexpectedly, this error must be fixed before the
Sunny Island can be put into operation. For this purpose, refer to section
20 ”Troubleshooting” (page 195).
