SMA SC 500HE-US Maintenance Manual - Manual (Page 37)

SMA America, LLC 4 Maintenance
Maintenance Manual SC500HEUS-eng-WH-IUS120411 37
4.4 Performing Maintenance Work on Inverters with Activated
Control Voltage
This section describes maintenance of the Sunny Central when the control voltage is switched on. The
inverter's component parts are energized. During the maintenance tasks described in this section it
may be necessary to turn the inverter off and then back on several times.
4.4.1 Connecting the Control Voltage
Figure 11: Position of the miniature circuit-breaker
%"/(&3
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Electric shock from live voltage
High voltages are present in the inverter and its component parts. Failure to heed this safety
message can result in severe or lethal injuries due to electric shock.
• Wear personal protective equipment.
• Follow instructions precisely.
• Observe safety messages.
Position Designation
A Miniature circuit-breaker for the external control voltage
B Miniature circuit-breaker for the internal control voltage
C Miniature circuit-breaker for the voltage meter