16 Multicluster Operation SMA America, LLC
146 SI4548_6048-US-TB_en-13 Technical description
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. To do this, the DC circuit breakers
of all Sunny Islands in the extension cluster must be set to "ON".
Proceed as follows:
1. Perform steps 1 to 4 of the start-up procedure on the master of the main cluster (see Section 9.1
"Switching On", page 73).
☑ The masters of the extension clusters show the
following message:
2. Press and hold <ENTER> on the main cluster
master.
☑ The remaining time is displayed as a bar.
☑ A beep 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 master of the main cluster as described in Sections (see Section 9.2 "Stopping the Sunny Island
(Standby)", page 74) and (see Section 9.3 "Switching Off", page 75).
Starting the Multicluster system
The Multicluster system is started once the main master has started. All extension clusters follow
the main master.
Error occurrence
If the Sunny Island displays an error message, this must be remedied before the Sunny Island
is commissioned (see Section 20 "Troubleshooting", page 204).
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