SMA SC 250U - Manual (Page 62)

7 Operating the Disconnect Unit SMA America, LLC
62 DISU_SCUS-IA-IUS111711 Installation Guide
7.2 Switching on the Disconnect Unit
1. Turn all switches of the DC load break switch to the
right into position ”On”. You need to push/pull
sharply in order to move the switches.
2. For Disconnect Unit for Sunny Central 250U⁄500U:
• Turn the AC breaker to the right into position
”On”. You need to push/pull sharply in order to
move the switch.
3. For Disconnect Unit for Sunny Central 500HE-US/
CA and Sunny Central CP:
• Operate the lever of the circuit-breaker a few
times.
☑ The mechanical indicator below the red button
changes its color to yellow.
• Push the green button.
/05*$&
Only switch on the Disconnect Unit after all parts of the PV power system are set up.
The Disconnect Unit is only one part of the PV power system. The commissioning of the Disconnect
Unit must not be performed until all parts of the PV power system are set up. A complete description
of commissioning can be found in the commissioning protocol of the Sunny Central.